Overall Solution of Educational Big Data (5)

(4) Correction of wrong questions

Collect the students' wrong questions in this exam, and extract the stems and correct answers of all the questions.

(5) Improvement plan

Analyze students' mastery of knowledge points, calculate students' room for improvement and predict higher scores for the next exam. According to the wrong knowledge points of the students in this test, the students with higher grades compared to the same period of time are divided into students, and the knowledge points with the same knowledge points are found to have a large gap.

(6) Personal recommendation

According to the analysis of the students' exams, accurate test questions are recommended according to the mastery of the students' knowledge points. For each knowledge point that needs to be mastered, three types of test questions are personalized: basic, advanced, and training. Three-stage test questions to help students Efficient self-directed learning.

• report publication

The student's intelligence performance improvement report is published in the form of a paper exercise book, which is organized and distributed to students by the school, grade or class.

1. 1. 1. Big data application in teaching process
         1. Wisdom Classroom ( Xiaowo Classroom )

Xiaowo classroom integrates information technology into the teaching environment and teaching activities, builds an intelligent teaching and learning environment in which technology, resources, and service subjects are coordinated with each other, and further promotes the smooth development of information-based classroom education and teaching activities. Provide accurate hierarchical teaching services and good personalized learning support. Provide students with a personalized accompanying learning terminal based on security control, which fully covers the whole process of "teaching" and "learning" such as pre-class guidance, in-class interaction, and after-class evaluation, and accurately locates individual differences of students through data collection and analysis. Provide new spaces and services for teachers' hierarchical teaching, students' individualized learning, and parental supervision, and realize the improvement of teaching and learning efficiency in the information technology environment.

1. 1. 1. 1. 1. classroom interaction
2. preview

Pre-class preview is an important prerequisite for improving the quality of classroom teaching. However, pre-class preview in traditional classrooms often makes students unable to grasp the key points of preview. Students preview blindly, and the preview effect is relatively poor. Through a learning guide or a learning task list, students can conduct pre-class preview in a purposeful and planned way according to the key learning points, and improve the quality and efficiency of students' preview. Xiaowo classroom can help teachers and students to carry out effective pre-class preview work. Teachers push high-quality teaching plans made by themselves or downloaded from other teachers to students, and students can use smart terminal PAD to preview courses in advance.

1. Multi-screen Interactive Demonstration

Realize wireless screen projection, three-screen interaction, and screen sharing in classroom teaching, and support the authority control of wireless screen projection by teachers, so that teachers' tablets, students' tablets and electronic whiteboards can be synchronized to encourage students to focus on classroom learning. In the classroom, in addition to the teacher teaching on the same screen, the teacher can also choose the students, use the student tablet to explain on the same screen, or randomly check the current learning content of the student pad.

1. Classroom blackboard writing and annotation

In classroom teaching, teachers can use whiteboard or PPT courseware to teach, and can perform operations such as blackboard writing and annotation, and can freely choose brushstrokes, eraser, vector tools, etc., which are as convenient as blackboards and electronic whiteboards. Teachers who use tablet teaching are no longer limited to the scope of activities of the podium, but can walk among students to have close contact and interaction.

1. Class Notes

In the classroom, while listening to the teacher's teaching explanation, students can quickly add notes and tags on the tablet by saving blackboard writing, taking photos, screenshots, etc., to ensure that students have sufficient time to follow the teacher's knowledge explanation to think. Save notes with one click, so that students have more time to think about what they have learned, which helps to improve learning efficiency.

1. Various interactions

In the process of explaining knowledge, the test form of question and answer can effectively understand the learning situation of students. Xiaowo Classroom supports multiple forms of real-time question-and-answer, such as random questioning and instant answering, which solves the problems of less interactive means and rigid interaction modes in traditional classrooms, which helps to activate the classroom atmosphere and improve students' learning enthusiasm.

1. class quiz

After the classroom knowledge points are explained, the teacher can intercept the content of the courseware or blackboard as a topic, and send it to the students for answering immediately; the teacher can also prepare test papers and test materials in advance through the collection and sharing platform of resources, and send them to the students in the classroom. Class quiz. The objective questions are automatically reviewed by the system, and the subjective questions can be reviewed by students themselves and interactively. The test results are fed back to teachers and students in real time. Teachers improve teaching in a timely manner through feedback results and give learners personalized guidance. Students use feedback results to keep abreast of their own learning status and make up for their own deficiencies to optimize the learning process.

1. teaching record

After the classroom teaching is completed, Xiaowo Classroom will automatically generate a classroom behavior record to record the behavior data generated by the interaction between the teacher and the students in this classroom. Teachers can use the timeline to review the classroom's control over the teaching focus, as well as the rationality of classroom design and time arrangement, so as to reflect on the shortcomings in the teaching process and improve teaching in a timely manner; students can review and consolidate the content that needs to be strengthened , Understand your own learning status and optimize the learning process.

1. data synchronization

Teaching behavior records, quizzes, wrong questions, notes and other data will be automatically synchronized to cloud storage.

1. 1. 1. 1. 1. Extracurricular study
2. assignment

In the past, teachers could only rely on the exercises in textbooks or workbooks. There were relatively few resources for test questions, and the method of setting questions was relatively simple. And Xiaowo extracurricular can provide teachers with a variety of convenient question-making modes, and has built-in a large number of test question resources for teachers to choose and use:

1. Teachers can choose to take pictures and ask questions, solve one picture to many questions, multiple pictures to one question, and let students find the connection through the question number;

1. The teacher can choose the attachment to make the question, and the teacher only needs to set the answer sheet;
2. Teachers can also choose to write questions together. Teachers in the same subject group can take turns to write a set of questions, and other teachers can directly use the application to publish assignments, tests and other tasks.

 A variety of efficient questioning methods provide convenience for teachers to test students' pre-class preview, in-class knowledge learning, and after-class knowledge consolidation, which greatly improves the efficiency and quality of teachers' questioning.

1. homework review

The traditional method of correcting homework is done manually by teachers, which greatly increases the workload of teachers. Therefore, teachers urgently need information-based and intelligent marking methods to help complete a large number of exercises and test papers. Xiaowo is a teacher outside of class Provide a variety of review methods.

1. The objective question system automatically marks and grades, without manual correction by the teacher;
2. Teachers can choose to mark subjective questions by themselves. Not only can they give students a score to judge whether they are right or wrong, but they can also make annotations in the form of voice to directly evaluate students' answering conditions;
3. Teachers of subjective questions can also choose to allow students to mark by themselves. This method can set a student's answer as a reference answer, so that students can review by comparison;
4. Subjective question teachers can also allow students to review each other. The system randomly assigns the student list to prevent students from favoritism. This method also supports setting a student's answer as a reference answer.

 After the teacher completes the review, he can explain the questions in a targeted manner. It supports four forms: text, pictures, voice, and short videos. Students can also learn the ideas of problem-solving outside of the classroom. The analysis not only supports what the teacher himself publishes, but also supports other teachers and students to participate in the analysis.

1. wrong practice

Wrong question practice is the key to students' improvement in performance. In the past, students had to manually make wrong question sets by themselves, which wasted a lot of time and energy, and the problems encountered in the learning process were often not immediately resolved, which greatly hindered students from improving their learning. efficiency and academic performance.

The data of students' wrong questions generated by Xiaowo Extracurricular, Xiaowo Classroom, and Xiaowo Growth, which is the quality monitoring platform, will be included in the student's own wrong question collection. Students can independently practice wrong questions. Each student can raise their own questions during the learning process For questions, teachers or other students can answer them until the questioner gets a satisfactory answer.

1. knowledge map

In the past, if teachers wanted to know the learning situation of students' knowledge points, they could only test the teaching effect, and could not test and evaluate the students' learning process. Due to the limited teaching conditions, teachers could not obtain instant feedback of classroom teaching information. To a certain extent, it hinders the improvement of teaching quality and efficiency. Xiaowo can provide teachers with the monitoring of the teaching process and teaching effect after class, assist teachers to adjust the teaching direction according to the class, and train the excellent and supplement the poor for individual students.

1. For material tasks, you can count the learning time, number of questions, and answers for each student;
2. Test tasks can count the answering time, scoring rate, and answer distribution data of each small question, and can also conduct comparative analysis of individual students to understand the answering time and scoring rate data of a single student;
3. The knowledge map collects a large amount of teaching and learning data, including the test data generated by Xiaowo Classroom and the test data generated by Xiaowo Growth, the quality monitoring platform, as well as the data generated by students practicing wrong questions independently. These data are related to the corresponding subject chapters or knowledge Points, form the overall distribution of subject knowledge points, the degree of mastery, periodic fluctuations and other data.
   1. 1. 1. 1. Intelligent control

1. open

1. PAD application is pushed to students by school administrators and teachers

School administrators and teachers can configure applications on student pads on the cloud, select some application software that can help students learn, and directly filter out game applications that are not related to learning. In order to meet the different needs of application push, the application software can be pushed in batches for classes, grades, etc., or a single push can be made for a certain student.

1. Smart terminal PAD and cloud applications are updated synchronously

The application software on the student PAD is updated synchronously with the application software on the cloud of the management and control platform that matches the same account, and the school proxy server performs synchronous transfer. The school administrator or teacher only needs to push the application for each grade, each class or a certain student on the cloud, instead of downloading and installing the application for each tablet, just select the name of the student to be pushed on the management and control platform. The application software pushed by it is automatically updated to the student PAD.

1. controllable

1. Xiaowo classroom bottom management and control

No matter before class, during class, or after class, students’ PAD is always under control and cannot perform any operations unrelated to learning. For example, games and other applications are prohibited from being downloaded and installed, and all operations of students on the PAD are recorded. In the classroom, the student-side PAD is always controlled by the teacher-side PAD. For functions such as screens, students can only view the same tablet screen as the teacher, which effectively restricts students from performing other operations that are not related to learning.

1. Smart terminal PAD and cloud management and control strategies are updated synchronously

The cloud management and control strategy matching the student PAD synchronization and account, and the school proxy server for the transfer of synchronization. School administrators can configure student PAD management and control policies on the cloud, and impose corresponding restrictions on PAD. Control strategies include: application whitelist, application blacklist, URL whitelist, and URL blacklist. The management and control policies limit the application software and websites that students can install on the PAD.

1. 1. 1. 1. AI classroom
            1. classroom structure

The users of the system business design are: teachers, students, parents and school administrators, with the classroom as the core scene, using the latest technology and products to build three categories of applications: "teaching", "learning" and "management". The architecture is detailed as follows:

AI Smart Classroom System: It consists of teacher cameras, student cameras, 2 pickups and an intelligent recording host. The system is simple but not simple. One system can support multiple functions such as recording, broadcasting, attendance, and behavior analysis.

6 kinds of applications: Break through application barriers such as attendance, recording and broadcasting, teaching analysis, etc., realize facial recognition attendance management, visual class tour supervision, video resource management, accompanying classroom analysis, accurate message push and other functions, to meet the needs of teachers, students, parents and management multi-role requirements.

4 types of users: The school is a relatively closed ecosystem with the core purpose of "teaching" and "learning". All work revolves around improving students' comprehensive quality and learning all kinds of knowledge. Teachers, students and school administrators constitute the basic elements of campus operation. At the same time, as the interaction between home and school becomes closer, parents are eager to keep abreast of their children's learning and growth and help them in time.

1. 1. 1. 1. 1. classroom features
               1. Leading Video Image Processing Technology

The image acquisition equipment is embedded with an intelligent tracking algorithm, and adopts a unique combination of face detection and head and shoulder model detection, which can more effectively realize the tracking of teachers and the detection of student positioning. At the same time, the device has efficient wide dynamic and noise floor effects, which can effectively prevent high-brightness ambient light interference.

1. 1. 1. 1. 1. 1. Non-inductive face roll call for students

The student face capture machine continuously scans and captures, and transmits to the background for comparison and analysis in real time, which can accurately analyze attendance results and report abnormal attendance in time.

1. 1. 1. 1. 1. 1. Accurate teacher-student behavior analysis

Using face comparison and video structuring technology, the system can realize the identification and analysis of 3 kinds of teacher behaviors and 7 kinds of student behaviors, which can be used as the basic data for students' growth and lay a new starting point for future education big data.

1. 1. 1. 1. 1. 1. High Value Business Data

Through professional underlying equipment, the system can accurately collect teacher and student attendance data (can be combined with pictures and videos), teacher and student classroom behavior data (wonderful pictures of different behaviors, short videos of each behavior), and student concentration. These data can be connected to the upper-level schools, districts, counties, and city-level education big data platforms to help the continuous deepening of these businesses.

1. 1. 1. 1. 1. System composition

The whole system is composed of teacher camera, student camera, anti-echo pickup, recording and broadcasting touch keyboard and K series intelligent recording and broadcasting host.

1. 1. 1. 1. 1. 1. Intelligent recording host

As the core module of the system, this device adopts a new generation of high-definition recording and broadcasting all-in-one machine. This device integrates a number of IT patented technologies, and integrates functions such as video coding, audio mixing control, automatic broadcasting, recording and broadcasting control, and meets normalization and high-quality products. Teaching requirements, can be widely used in the construction of high-quality campus courses, distance teaching, live broadcast of campus activities and other occasions.

1. 1. 1. 1. 1. 1. teacher camera (poe)

l The teacher's smart camera is composed of a trinocular fixed-focus camera and a high-performance GPU module, embedded with a binocular stereo vision algorithm and a deep learning algorithm, and supports the teacher's behavior detection function: when there are teachers walking, running, or writing on the blackboard in the detection area , the client software can give a corresponding alarm prompt.

1. 1. 1. 1. 1. 1. student camera

According to different functions, student cameras are divided into second-generation student face capture cameras and intelligent analysis cameras. The student face capture machine combines the advantages of viewing the panorama at a fixed point and details at a moving point, and adopts an integrated design to achieve the effect that a single product can be seen both fully and clearly.

1. 1. 1. 1. 1. 1. anti-echo pickup

Audio collection uses anti-echo pickups to collect audio from teachers and students. The number of pickups can be arranged according to the size of the classroom. Generally, two standard classrooms (about 70 square meters) are installed. Suction ceiling installation, installation height 2.5 meters.

1. 1. 1. 1. 1. 1. Recording touch keyboard

The recording and broadcasting touch keyboard is a network-controlled tablet keyboard with a 10.1-inch touch-sensitive LCD screen. It is perfectly combined with the teaching recording and broadcasting system, enabling teachers to control the teaching recording process in real time, conveniently and with zero burden.

1. 1. 1. 1. 1. system function
               1. classroom attendance

Teacher face attendance

The teacher's Deep Eye camera has a built-in deep learning algorithm, which can analyze the teacher's attendance results through the front-end recognition and comparison method, as shown in the following figure:

Student face roll call

Statistical analysis of each student's attendance status requires higher-definition front-end equipment and more efficient face analysis and comparison back-end equipment. Due to the limited resolution of ordinary cameras, the imaging pixels of students in the back row or corners are relatively low, so it is difficult to compare For analysis, the student face capture machine consists of two parts: a static point and a dynamic point. The static point is responsible for capturing the overall picture of the students in the classroom, and the moving point is responsible for capturing the partial picture of the students. The output screen is more suitable for the comparison and analysis of the back-end face analysis equipment, so as to ensure its high accuracy. The back-end face analysis and comparison equipment is also very important, and the lack of performance of the comparison will affect the final comparison efficiency and accuracy.

The management platform can summarize and display the attendance status of each student. If it is not captured, it can be recorded in time.

Attendance Analysis Report

By summarizing the attendance data of each class, it is possible to analyze the class attendance rate and abnormal number of people (absenteeism, lateness, early leave, etc.); at the same time, the long-term statistical data can be analyzed for trends to see the overall situation of each class.

1. 1. 1. 1. 1. 1. classroom supervision

Real-time manual tour

Traditional teaching tours require tour staff to go to each classroom to conduct on-the-spot checks and statistics, and to make statistics and records on whether the class is taught according to the schedule, the situation of teachers in class, and classroom requirements. This will cause some problems, including affecting the performance of teachers and giving teachers Bring psychological pressure, student performance and so on. Through this system, teachers can conduct real-time online class tours without being restricted by time, region, and method, avoiding the above problems,

For schools with a large screen in the monitoring center, you can easily drag the classroom screen that needs attention to the wall to achieve convenient operation.

For each visiting classroom, you can record and evaluate directly on the platform, and the dimensions and weight of the evaluation can be set according to the actual situation, as shown in the figure below:

Intelligent tour

If a class inspector is responsible for inspecting multiple classrooms at the same time, it is difficult to find out the disciplinary problems in the classroom in time. By automatically analyzing the key behaviors in the classroom: lying on the table, standing up, etc., it can assist the class inspector to be more efficient to a certain extent carry out work.

Tour Analysis Report

By summarizing the class tour records of all classes, it is possible to clearly display the number of manual class tours, intelligent class tours, and the results of each class tour.

1. 1. 1. 1. 1. 1. resource management

The application functions of course video resources mainly include course display, full resource on-demand, online live broadcast, excellent course selection, personal space, online editing and other functions.

Course Show

By displaying all the course video resources recorded by the whole school in categories according to grade, subject, teacher and other conditions, it is beneficial to form a video resource library in the school, and users can quickly search according to the filter conditions.

live online

Due to limited space and time, it has gradually become a trend to live broadcast courses through the Internet. The system provides 3 viewing methods: CS client, BS client, and mobile client.

The picture below is the CS client:

The picture below is the BS client:

The picture below is the mobile client: it provides basic functions such as live broadcast, on-demand, and personal center.

All resources on demand

Support "three-dimensional" resource integration, around the classroom video, users can upload corresponding documents, such as: teaching plans, courseware, course design, case documents, auxiliary pictures, etc., the format supports PDF, office, jpg, etc., to realize the sharing of classroom resource packages Relevant documents can also be viewed online like classroom videos, and through three-dimensional resource package sharing, users can fully understand and learn courses.

Excellent course selection

The school-level platform is equipped with an excellent course evaluation module, which can support school-level excellent course evaluation activities. During the appraisal activity, teachers can view the details of the appraisal activity, such as activity name, activity progress, activity introduction, entries (displayed when results are not set), and results display (displayed after setting results).

personal space

The platform supports the personal space of teachers and students. In the personal space, teachers can manage their own courses and videos, and can also view their favorite courses, view viewing history, modify personal information, and modify personal passwords.

video editing

Knowledge point marking: The platform supports knowledge point marking technology to achieve the effect of linking knowledge point information and video progress. Users can search for what they search for, and can easily search for each knowledge point of the 45-minute classroom video at will. You don't need to read the entire course for a certain knowledge point, which fully meets the needs of mobile learners.

Online editing: The platform supports online editing of videos, mainly for video cropping and adding titles and endings. Through the video cropping function, teachers can select reserved video clips and discard unnecessary video clips; they can also add opening and closing credits to the video.

The video editing function meets the most commonly used functions of teachers, and there is no complicated client operation, which is beneficial to the efficient generation of teaching resources.

1. 1. 1. 1. 1. 1. classroom analysis

With the rapid development of technologies such as face recognition, behavior analysis, and video structuring, it is increasingly becoming a trend to use these technologies for "accompanied" and "instant" collection of classroom data. This AI+ classroom teaching mode has the following advantages:

1) Quantifiable: Every move of teachers and students in the classroom can be statistically analyzed, accurately showing various activities in the classroom, and making it possible to change from "subjective feelings" to "objective data";

2) Easy to manage: By quantifying the behavior and emotions of teachers and students into data, students with problems (low learning efficiency, negative expressions, etc.) can be clearly found, and timely intervention and guidance can be carried out;

3) Refinement: In the past, due to the limited energy of teachers, it was difficult to deeply understand the learning situation of each student. Now with these quantifiable reports, it is possible to teach more accurately and in a targeted manner.

AI Analysis Dimensions

Based on the existing technical conditions, it mainly focuses on two categories: classroom behavior analysis and classroom concentration analysis.

Classroom Behavior Analysis includes:

Ø Statistical analysis of class behavior

Ø Comparative analysis of class behavior

Ø Class behavior trend analysis

Ø Statistical analysis of school-wide behavior

Classroom focus analysis includes:

Ø Comparative analysis of students' concentration

Ø Comparative analysis of class concentration

Ø Class concentration trend analysis

Ø Collision analysis of test scores and concentration

Classroom Behavior Analysis

Types of Behavior Analysis

3 teacher behaviors: stepping off the podium, writing on the blackboard, and multimedia lectures;

7 kinds of student behaviors: reading, writing, listening to lectures, raising hands, standing up, lying on the table and playing with mobile phones;

Statistical Analysis of Class Behavior

  By continuously scanning and capturing the behavior data of teachers and students in the classroom, it summarizes and displays 3 kinds of teacher behavior and 7 kinds of student behavior data, which can reflect the classroom atmosphere and teaching effect.

Comparative Analysis of Class Behavior

By integrating and comparing the data of each class, we can see the differences between each class, which are reflected in the classroom atmosphere, violation of discipline, and teacher-student interaction. Such data provide a basic basis for the analysis of "heterogeneity in the same class" .

Class behavior trend analysis

Through long-term observation and recording of classroom behavior data, the classroom behavior trend of each class can be seen, thus providing a basis for the head teacher or school leader to assist decision-making.

Statistical Analysis of Whole School Behavior

By summarizing the behavior data of teachers and students in each class of the school, we can see the overall teaching effect of the school classroom and provide a basis for school leaders to assist in decision-making.

Classroom Concentration Analysis

Concentration was originally just an emotional word to describe the degree of concentration of students in class. It is limited by technical conditions and cannot be quantified. Using the student face capture machine to scan and patrol between preset points can reflect the students' concentration status in real time and accurately.

Data cleaning: Since the student’s face capture machine has repeated fields of view at each preset point, the same student will upload multiple snapshots at short intervals. If no filtering is performed, the statistics will be inaccurate, and the obtained index will be inaccurate. Unable to characterize actual concentration.

Assign weight: The more pictures of students captured at the same time, the greater the weight assigned to these students. During the class, the weight is continuously assigned and accumulated.

Normalization processing: Since the final statistical data range may not be in the same range, it is necessary to convert these data into the same range to be comparable.

Comparative analysis of students' concentration

As shown in the figure below: set the horizontal axis as students and the vertical axis as the student concentration index, you can find out the concentration of students and find outlier students in time.

1) Median: Through certain modeling operations, the median of this type of index can be obtained, especially pointing out that the index is not an average, but represents a realistic "standard value";

2) By finding "outlier students" (students who deviate from the median range), conduct offline conversations with such students to assist teaching management.

Comparative analysis of class concentration

Set the horizontal axis as the class, and the vertical axis as the class concentration index. Classes that deviate from the group will receive special attention.

The concentration index of each class at the same time is displayed in one coordinate, which is mainly used to find "outlier" classes, which obviously deviate from the median and deserve special attention.

Class concentration trend analysis

Setting the horizontal axis as time and the vertical axis as the class concentration index, a trend graph of the class index can be formed, and problematic classes can be accurately found according to the overall trend.

By displaying the concentration index of each class in each subject on a curve, you can see the teaching effect of this subject in the class. If the overall trend is offline for a long time, you can communicate with the relevant teacher and supervise. It improves the way of teaching.

Collision analysis of test scores and concentration

Set the horizontal axis as the student concentration index, and the vertical axis as the test scores. When the system imports the grades of students in the class, it can form a corresponding graph of concentration index and grades, so as to find students with outlier coordinates.

Through the collision analysis of grades and concentration index, it is mainly to find "outlier" students:

1) Type 1: Concentrate in class and have good academic performance;

2) Type 2: not serious in class, poor grades;

3) Type 3: Although the class is more serious, the students' performance is poor and the grades are not good;

4) Type 4: Although they are not serious in class, they have strong learning ability and good learning effect.

1. 1. 1. 1. 1. Data Fusion

The AI ​​classroom data is integrated with the big data platform, and the teacher and student behavior data: concentration, teacher and student behavior statistics, etc.; attendance records: real-time feedback of teacher and student attendance records and other data are released on the electronic class board and mobile platform.

1. 1. 1. 1. Smart sports

Through the physical education course, the students' movement indicators and heart rate indicators are monitored in real time during the process of achieving the goal, so as to better guide the teaching, record the student's movement situation in seconds, and then carry out big data on the students in the class through the background Analysis helps physical education teachers achieve teaching goals and provides more scientific and accurate data support for educational management decision makers. Using the information platform, parents can improve students’ health records and master sports safety before class; use data analysis to try to support layered teaching with data, so that the exercise load is safe and reasonable; use smart devices to realize early warning of sports risks and ensure classroom safety Assure. Realize teaching big data collection and analysis Comprehensive collection of teaching data, lesson preparation data, classroom data, sports data, performance data, all automatically collected. Comprehensive data analysis, find more valuable information from multi-dimensional data analysis, and make teaching more scientific.

1. 1. 1. 1. 1. Teaching and research management

Teaching plan/unit plan/school-based lesson plan/automatic lesson preparation/collective lesson preparation/teaching reflection.

1. 1. 1. 1. 1. Physical Education Classroom Monitoring

Use smart devices to monitor the quality of physical education classes, presenting various indicators such as exercise intensity, practice density, class average heart rate curve, student heart rate curve, and heart rate warning.

1. 1. 1. 1. 1. Physique data guide teaching

In the form of radar charts, students' physical fitness and sports fitness are intuitively displayed. Students are grouped according to their physical conditions and physical fitness data, and teachers are supported in hierarchical teaching.

1. 1. 1. 1. 1. performance management

Enter student test scores, view and export score data, which is convenient for teachers to organize and compare scores as a whole. The teacher sets the scores and proportions of the content of the test items, and the system automatically calculates the relationship between the content of different items and the scores. The teacher's operation is convenient and the shackles of redundant data are released.

1. 1. 1. 1. 1. High school entrance examination sports evaluation

For the group of junior high school entrance examination students, we conduct multiple tests and follow-up on students to observe the growth of students' performance, so as to help students, teachers and schools to carry out targeted improvement and practice, make up for the shortcomings of performance, and develop superior projects.

1. 1. 1. 1. 1. Interest class management (by class and sub-item)

Support cross-class/cross-grade, hierarchical according to physical fitness data, teachers' dynamic adjustment, and students' WeChat registration.

1. 1. 1. 1. 1. sports homework

Quickly arrange homework, video demonstration, student self-evaluation, parent evaluation, teacher evaluation, student completion record display, and semester homework completion statistics.

1. 1. 1. 1. 1. Student Health Records

The system records children's healthy growth files through various methods such as student and parent information entry, and questionnaire self-testing, helping teachers to achieve hierarchical teaching in class, and at the same time prevent the occurrence and handling of special situations.

1. 1. 1. 1. 1. education resources

A large number of physical education teaching plans for primary and secondary schools are compiled by a group of professors and experts from physical education colleges, and the most professional content covers the ultimate end of physical education. In the teacher's teaching plan for each lesson, the action video that needs to be taught is automatically matched, and presented in the form of video, graphic explanation, and language explanation, which can meet the needs of teachers in multi-scenario applications such as lesson preparation before class, demonstration during class, and homework after class.

1. 1. 1. 1. 1. Student Quality Analysis

Scores are converted according to the scores of various indicators of students, and the trend of physical development is continuously tracked. Individual display, class display, and school-wide display can be switched to meet the supervision and reporting needs of different levels.

1. 1. 1. 1. 1. exercise prescription

According to the analysis data of students' physique, the system automatically matches the exercise prescription suitable for students to exercise. The youth physical fitness exercise prescription algorithm was developed with the participation of an expert group from the Institute of Physical Education.

1. 1. 1. 1. 1. Principal Management Cockpit

Display the comprehensive teaching and educational information of physical education teachers in the school, such as lesson preparation, teaching plan revision, class, reflection, and homework, conduct statistical analysis on the quality of physical education teaching of teachers, adjust teacher course allocation based on data, optimize teacher resource allocation, and improve the overall physical education level of the school; Conduct comprehensive analysis on students' physical health and academic level to help schools accurately monitor the school's students' physical health and sports ability; conduct statistical analysis on students' sports process evaluation items;

1. 1. 1. 1. 1. City , district and county management interface

Provide comprehensive analysis data of physical health of schools in the jurisdiction, statistical analysis data of physical health of the whole region; provide comprehensive analysis data of academic evaluation of schools in the jurisdiction, statistical analysis data of academic evaluation of the whole region; assist the Education Bureau to accurately monitor the physical health level of students in the region and sports ability, formulate a scientific and reasonable physical education policy in line with regional students.

Provide comprehensive analysis of the development of physical education courses in each school, comprehensive analysis of teaching and teaching quality, help teaching researchers to control the quality of physical education teaching of teachers in each school in real time, make targeted adjustments, train regional physical education teachers, and improve teachers' physical education teaching ability and quality , and then improve the overall level of physical education in the region.

1. 1. 1. 1. High-quality recording and broadcasting system
            1. System Topology

1. 1. 1. 1. 1. Teaching recording and broadcasting system
               1. Embedded recording and broadcasting workstation
2. local storage

When recording high-definition courses, the data volume of course files is relatively large, especially when multiple recording classrooms record courses at the same time. If there is no local storage device, the video must be transmitted to the main server in real time, which will take up a lot of resources. Network resources, on the one hand, affect the normal network application of the school, on the other hand, when the network cannot support data transmission, it will inevitably lead to incomplete course videos.

Different from most distributed recording and broadcasting devices that do not configure local storage modules, this system is equipped with a 1T data hard disk at the end of the recording and broadcasting module. The recorded courses can be stored in the local hard disk in advance, and then uploaded when the network is idle, reducing the pressure of data transmission on the network and avoiding the loss of video files and other problems.

1. Scheduled automatic upload

While high-definition video has high picture quality, it inevitably brings a problem, that is, a large amount of data. When multiple recording and broadcasting classrooms record courses at the same time, the amount of data will be very large. If these data are uploaded at the same time, it will inevitably affect the The network forms an extremely heavy load. Once there is a problem with the network, it will directly affect the recording of the course. In order to avoid uploading a large amount of data at the same time, we have developed a scheduled upload function. Users can set the video transmission time by themselves, and upload the video to the server when the network is idle, reducing the pressure on network data transmission.

1. The whole process, full HD video shooting

Full HD is not a simple high-definition display. It requires starting from full-HD shooting, going through full-HD digital acquisition, compression, editing, recording, transmission, etc., to the client-side decoding and playback for final display, and full HD is reflected in this whole process among. Supports 1920×1080 resolution video capture, and is backward compatible with 1280×720 resolution and SD resolution.

1. DSP microprocessor

Digital signal processing is a process of converting real analog signals (Analog signals) in the real world into digital information (Digital signals) that computers can process. These signals are converted into digital signals through an analog-to-digital conversion process (called AD) and sent to the processor for digital calculation. After the processing is completed, the results are converted back into continuous signals through the digital-to-analog conversion process ( Call it DA). These tasks can be done with general-purpose microprocessors, but the problem is that to meet such a high computing speed, it is difficult to ensure that the power consumption is very low, and it is even more difficult to ensure that the price is cheap enough. Therefore, another microprocessor came into being: Digital Signal Processor, referred to as DSP (Digital Signal Processor).

Due to the low power consumption of DSP technology, when the recording and broadcasting equipment is recording high-definition video files, the working state of the whole machine is very stable, and the CPU occupation rate is below 50%. However, when most recording and broadcasting products on the market only record resource mode, the CPU occupies The rate has reached about 70%. Low power consumption ensures the excellent performance of the whole machine, and there will be no problems such as frame loss, audio and video out of sync.

1. H.264 video codec technology

H.264 is a high-performance video codec technology. Thanks to H.264's powerful compression capability, versatility, and tolerance to network performance, H.264 has a very wide range of applications and has become an international One of the most mainstream video codec technologies in the world. The target application of H.264 covers most of the current video services, such as cable TV remote monitoring, interactive media, digital TV, video conferencing, video on demand, streaming media services, etc. Most high-definition videos are encoded in the H.264 format.

my country's radio and television systems and telecom operators have taken H.264 as the main direction of promotion. In the current IPTV projects that have been implemented by telecom, almost all of them have adopted H.264; major TV stations in the radio and television system are converting from analog to digital , and in the two-way transformation of the network, a large number of H.264 technologies have also been adopted.

The Ministry of Education is also very concerned about the format of the video. It clearly stipulates in the technical standards for the shooting and production of high-quality video open courses that the video compression format requires the use of H.264 encoding technology. Our company's products are in full compliance with the requirements of the Ministry of Education, and we are the first manufacturer to fully respond to the relevant technical requirements of the Ministry of Education.

1. Automatic Voice Gain Technology

The teacher is constantly moving during the teaching process, so the distance between the microphone and the sound collection microphone is also constantly changing during the speech, which will also have a certain impact on the sound collection. If it is not processed, the sound will be loud and small. . The automatic voice gain technology means that regardless of the distance of the sound source, the device can adjust the collected sound by itself to ensure that the sound level is consistent. The recorded classroom video sound is natural and smooth, and the sound of the teaching scene is perfectly restored.

1. 1. 1. 1. 1. 1. Automatic recording and broadcasting system
2. class recording

The system uses high-definition cameras, pointing microphones and other acquisition equipment to record the teacher's teaching situation. Each recording and broadcasting terminal can access up to 5 high-definition cameras and 1 classroom computer video signal to complete the teacher's area, student area, blackboard writing area, The recording of the whole scene class situation such as the close-up area, the live recording of the teaching is saved as a standard MP4 format video file, including multiple video files of 1-channel movie mode + 5-channel resource mode, and the recorded content can include teachers, students, and teacher panoramas , student panorama, blackboard writing and VGA signals such as computer screens and digital booths.

class recording

Users can conduct local broadcasting by connecting monitors, mouse keyboards and broadcasting consoles locally, or remotely access recording and broadcasting workstations through the network. The home page of the broadcasting director interface lists the current recording status, recording time, storage usage, etc. It is convenient for users to quickly understand the current status of the system and perform remote operations.

Director mode: There are three modes of "movie", "resource" and "movie+resource"; movie mode: the user can only see one video image during live broadcast, and only one video file is generated for recording; resource mode: D3700 supports 5 Channel video collection, you can see 6 channels of video images, 1 channel of VGA images, and 5 channels of camera video images during live broadcast and broadcasting. When recording, each video image generates a video file; movie + resource mode: you can watch it during live broadcast There are 7 channels of video images, 1 channel of VGA images, 5 channels of camera video images, and 1 channel of video images displayed in movie mode. When recording, each channel of video images generates a video file.

1. live broadcast

The system can broadcast live classroom records in real time through the network, and users can watch the live courses in real time through the IE browser.

During the live broadcast, you can switch the live mode; select the live screen for full-screen playback. Switch main and auxiliary screens.

1. Director management

The flexible control of the PTZ can be realized on the director page, and the mode switching and the switching of the main and auxiliary screen videos can be performed. guide

Here you can switch the video mode; you can choose when to click the "Start Recording" button according to the current video status.

The live broadcast can be turned off and on in the director interface.

In the director interface, you can "turn on and off the automatic tracking" to realize the automatic switching of the teacher's screen or remote manual operation;

If you want to adjust the position of the video shooting screen, you can use the six buttons "up", "down", "left", "right", "+" and "—" on the page to adjust the pan/tilt direction of the camera and the distance of the focal length Stretch for manipulation.

On the director page, use the number shortcut keys 1, 2, 3 to switch the video window.

1. video management

The recorded video files are listed on the "Record Files" page, and you can download, click, modify and delete video files through this page.

On the "Record Management" page, you can view the school year, semester (grade), subject name, teacher, subject, recording mode, recording date, file size, recording status and upload status of the recording file.

In this page, users can upload video files manually.

1. 1. 1. 1. 1. 1. Fully automatic tracking system

Using advanced embedded technology, built-in Web Service platform, with hundreds of strategies and control mode options, it is an intelligent device for automatic tracking, responsible for receiving and analyzing the data sent back by the detection equipment, and commanding the camera to track and shoot according to the analysis results .

In order to ensure the recording effect of teaching videos, the system provides a web-based access platform. The system has built-in a batch of templated application strategies, which can be changed and customized by users. Its characteristics include the following points:

1. The convergence of various intelligent image analysis technologies realizes spatial grid positioning, high recognition accuracy, strong anti-interference ability, and is safer and more efficient.

2. Hardware ARM+DSP embedded architecture, stable and reliable, standard 1U device, power consumption is only 5W.

3. "Restore the classroom", which embodies the teaching philosophy to the greatest extent, and intelligent strategies can be fully realized. And the strategy can be customized according to different teaching modes to make the shooting mode more flexible.

4. An integrated system of automatic tracking and broadcast guide switching, a comprehensive mode of multiple areas, multiple targets, and multi-level strategies.

5. The modular structure of teachers, students, and blackboard writing on the hardware platform, the modules can work independently or in combination to achieve richer and more complete automatic tracking and directing switching effects.

6. Wide static and dynamic, to ensure smooth and stable picture without shaking, making the picture more comfortable.

7. Based on the comprehensive and fine control of the camera, the intelligent depth of field adjustment according to the moving speed and range of the target can be realized, avoiding junk shots to the greatest extent, and improving the visual experience.

8. Support flexible multi-camera combined directing strategy, you can enable student panoramic and teacher panoramic cameras as needed, adopt a rich panoramic directing strategy, add a stable panoramic lens during the moving push-pull process of teacher or student close-up shots, and comprehensively improve The stability of the recording and broadcasting screen.

9. Support manual/automatic switching control, and realize camera control on the software interface.

10. Support mouse click tracking, click the part to be tracked on the video preview screen, the camera will automatically move in place, accurate positioning, fine control, convenient and simple.

1. 1. 1. 1. 1. 1. Director's station

The director console can better achieve the purpose of precise control and recording, and it is more convenient for users to record the video effects they need.

Professional recording teachers can see the complete teaching scene in the preview screen of the director console or monitor, and quickly switch and control multiple cameras through the hotkeys defined on the control keyboard. In movie mode , according to the defined prefab, the recording of the specified scene can be completed.

The broadcast guide station is professionally developed for classroom recording needs. The broadcast guide station supports simultaneous control of 5 cameras and can be linked with automatic tracking equipment; the start, pause, and stop functions of recording can be completed through the broadcast guide station. It has manual and automatic switching functions and broadcasts images. Buttons for selection function, picture-in-picture screen selection function, camera cloud mirror control, etc.; no less than 7 preset positions can be set for each camera, which is convenient for quick positioning; the operation can be completed without the cooperation of a keyboard and mouse, and Switch between manual and automatic modes at any time.

1. 1. 1. 1. 1. 1. Line Array Speaker

It is aimed at the phenomenon that most school speakers are not effective and the sound amplification is uneven. Proposed directional sound reinforcement technology, using the advanced linear sound source theory array speaker system, designed a line array speaker professionally used for classroom sound reinforcement, effectively avoiding the loud sound heard by the people in front, and the sound behind The situation where the person hears the sound is very small.

1. Adopt advanced linear sound source theory array speaker system;

2. Traditional speakers are "point sound sources", while line array speakers are "line sound sources". The sound emitted by traditional speakers will diffuse in both horizontal and vertical directions, while line array speakers do not diffuse in the vertical direction, but only in the horizontal direction;

3. The sound of traditional speakers diffuses from a point into a spherical surface, and will be reflected by the ceiling and the ground. The delayed sound is superimposed with the direct wave, which not only affects the clarity of the sound, but also easily causes howling;

4. The sound wave of the line array speaker does not spread in the vertical direction, so the generation of reverberation sound is effectively controlled, and the clarity of the sound is improved;

5. For traditional speakers, the sound pressure attenuation is 6dB every time the distance from the speaker is doubled, and the attenuation of line array speakers is only 3dB. For example, the same distance from the speaker is 8 meters, the sound pressure of the traditional speaker is -18dB. The line array speaker only attenuates 9dB, and the volume difference between the front and rear of the venue is reduced due to the reduced distance attenuation. In other words, it can also make the people behind hear clearly, and the output power of the line array speaker power amplifier is reduced by at least 4 times. It will also not cause the voices of the people in front to be loud and the voices of the people behind to be very low.

Line array speakers have excellent directivity and powerful power output, and can easily cope with large and medium-sized (reverberant) indoor environments, especially environments with strict requirements on sound effects. It is commonly used in venues, conference rooms and classrooms.

1. 1. 1. 1. 1. 1. interactive teaching system

In addition to solving the problem of point-to-point teaching application, a complete interactive classroom application system has been created. The system runs through the entire process of pre-class preparation, in-class interaction, and after-class statistics, thus providing a powerful tool for educational institutions to fully tap the use value of interactive classrooms. weapons.

When the interactive classroom has formed a certain scale, the entire teaching process will no longer be a simple point-to-point interaction, but a complete system. In addition to the construction of ordinary lecture classrooms and listening classrooms, overall management and application should also be emphasized , and the reuse of interactive courses, etc.

In the process of interactive classroom development, there are two parts involved, one is the main lecture classroom, the other is the listening classroom, and the interactive classroom can be directly established between the two. At present, the main lecture classroom can add up to three listening classrooms to achieve 1 to 3 remote interactive teaching.

1. class interaction

Through this system course, the main lecture classroom and the listening classroom are integrated to realize real-time interaction between each other. The receiving classroom can listen to the voice and picture of the teacher and PPT in real time in the main lecture classroom, and the main lecture classroom can listen to the voice of the students in the receiving classroom and watch the students screen. During the class, the lecture classroom and the reception classroom can ask and answer each other, realizing the real "face-to-face" interactive Q&A.

Among them, what the lecturer classroom sees is the picture of the students listening to the lecture, and what the lecturer classroom sees is the movie mode picture of the lecturer classroom.

1. live online

During the course, we can watch the live interactive teaching course on the platform. Watching the live course does not affect the normal progress of the course. During the watching process, online personnel can conduct text discussions, which is convenient for the development of various teaching and research activities .

1. 1. 1. 1. 1. Resource cloud platform
               1. personal space service

Personal space service supports message service, resource service, social service, instant messaging service and integration of teaching and research applications. Teachers and students can log in to the cloud platform through specific real-name user accounts, and operate according to different permission settings. Teachers can apply for course recording, manage recording videos, publish micro-lessons, participate in various evaluation activities and other functional operations; students can use personal space to collect, comment on, download and other targeted Youke videos, and promote the online learning space. .

1. information service

The personal space supports the management of basic personal information, including: editing personal data, changing uploaded avatars, resetting passwords, etc.

1. message service

The personal space provides message sending and receiving services. The success or failure of the teacher’s video upload, whether it has passed the review of the administrator, the video is ordered or evaluated, and the invitation to teaching and research activities, etc., are all sent to the teacher through the message service, and the agile message feedback mechanism is used to encourage teachers to actively participate in resource construction and teaching and research. active.

1. resource service

Support administrators to set up cloud storage-based network space for personal space, and administrators can set initial network storage space for personal spaces of different roles and positions. Users with different roles can manage private resources in the personal space. Personal resource service support:

Resource upload: Automatic transcoding to MP4 format during uploading, and document automatic transcoding to Baidu Wenku format without downloading and online preview.

Resource management: Users can browse/play, delete, and edit personal resources. For video resources, users can click to play, and support pause, play, stop and volume control. For document resources, users can preview online without downloading. Users can edit educational attributes of resources, including resource title, speaker, subject, grade, keywords and remarks.

Video attachment editing: Support adding document attachments and picture attachments to video resources, including teaching plans, lesson plans, teaching courseware, exercises, self-tests, etc., to form a complete video teaching resource.

Micro-video cropping: Users can crop video resources to form micro-videos of 5-10 minutes. Cropping supports virtual cutting technology, that is, cropping without damaging the source file, and supports simultaneous online editing of the same video by multiple people without affecting each other.

Video index of knowledge points and teaching links: Support teachers to add indexes of knowledge points and teaching links to video resources, which is convenient for on-demand users.

Resource collection and sharing: All public resources on the platform can be collected and saved in personal space, so that users can collect useful reference and learning materials for themselves. Information sharing. Support resource sharing in personal space, and provide online discussion and communication.

1. social service

Social Service Support:

Friend management: apply for friends, add friends, remove friends.

Instant messaging: supports online text communication between friends.

1. appointment service

Support teachers to directly make reservations for recording and broadcasting classrooms directly from the personal space. Teachers can check the reservation status of recording and broadcasting classrooms through the recording and broadcasting class schedule, and can see the reserved classrooms and the recording and broadcasting classrooms that they can book. Fill in the detailed appointment information, including: speaker, course name, class time, class location, subject, grade, description and other information, and you can set whether it is a live class. After the live class is over, the video will be automatically returned to the teacher's personal space.

1. Teaching and research application integration

The teacher's personal space can be used as a unified entrance for all application systems, and supports all teaching and research applications to be called in the personal space through a standardized interface.

1. Website Management Services

When the country mourns or commemorates on special dates, in order to cooperate with the country and the Education Bureau's advocacy, the platform supports one-click graying of the cloud platform page.

1. 1. 1. 1. 1. 1. Public resource platform
2. Excellence Center

The excellent course center is used for unified management and display of excellent course resources. Excellent course center supports:

Educational resource cloud storage: supports large-scale resource cloud management and distributed cloud storage. Resources are managed by reference, and a single physical resource can support separate management and use in multiple applications without duplication. Automatically recycle useless resources and make reasonable use of storage space.

Lesson resource construction: Provide standard http and ftp interfaces, support equipment such as recording and broadcasting, snapshot devices, and third-party applications to automatically upload relevant resources.

Resource cataloging: Support resource management by cataloging methods of subject, school period, version, grade, volume, chapter, and section. Catalog display order and catalog name can be set online. Supports the field custom label function of the directory, and users can perform operations such as adding, modifying, and deleting a directory. The catalog is inherited and will be used uniformly after the platform is built.

Resource classification: support user-defined resource classification and resource labels. The same resource can belong to multiple categories, and the categories support independent management of school platforms at all levels.

Resource release and review: Support users to set the review switch, which can be turned off, and resources will be released automatically after submission. The subject resource administrator can set the management scope of the subject of this school period. After setting, the subject administrator will only receive the resource review information submitted by the subject teacher.

Resource display: Support resource cataloging and classification to display resources. Support teachers to recommend excellent resources and display them in the recommendation area. The system automatically sorts the resources according to the number of on-demand (popularity), and automatically sorts the latest resources according to the upload time. The detailed functions are as follows:

A. Popular and latest resources can be classified and sorted according to subject attributes, grade attributes, and custom attributes.

B. Document resource requirements can be previewed online without downloading.

C. Support the ranking of institutions according to the amount of resources provided by the affiliated schools.

D. Display of theme resources. Lecture videos can be associated with document resources such as courseware, question banks, and teaching plans. While supporting video on demand, you can click on the document resource to directly view the content of the document.

Support the playback of movies and resource modes: it can support up to 5 channels of video playback at the same time, such as synchronously playing the teacher's close-up screen, the student's close-up screen, the teacher's panoramic screen, the student's panoramic screen, and the courseware screen in a split-screen manner. Careful observation of student behavior and teacher behavior.

Resource search: Support multiple search criteria for combined search, and also support users to quickly search for resources through title, speaker, and tag text.

resource application

A. Video reference. You can make off-site references to the viewed videos and recommend them to others;

B. Resource collection and download. Users can store favorite videos in their personal space, and download resources to local hard drives.

C. Resource comments, users can make subjective comments on resources. After the resource is commented, the comment information must be pushed to the personal space, and the corresponding message will be displayed. Admins can delete any comment, and users can delete their own comments.

D. Scale scoring: The videos watched by users on demand can be scored and evaluated online through the scale provided by the system, and the scoring and evaluation will be automatically pushed to the speaker space for teachers to learn and reflect.

E. Dots and clip comments: Users can make online dots and records of wonderful teaching session points and clips while watching course videos on demand, and can intercept and record a certain clip, so that they can learn and watch quickly next time.

F. Scan code to watch: the platform can also support scanning code sharing and mobile phone viewing through the use of mobile devices.

Resource evaluation: The platform supports quantitative evaluation of classroom video recordings, and multiple sets of evaluation standards can be set according to actual teaching evaluation requirements, such as evaluation standards for Chinese classes, evaluation standards for mathematics classes, evaluation standards for English classes, and teaching skills training for different subjects Use evaluation criteria. Different total scores can be set for each set of evaluation criteria, multiple evaluation items can be set, and multiple evaluation sub-items can be set for each evaluation item, which can meet various evaluation requirements. Support evaluation criteria editing function.

Micro-video interception: Teachers can cut a part of the video resources under the platform to generate new micro-videos. Micro video editing supports virtual cutting technology, on the basis of not damaging the source files, it supports simultaneous online interception of the same video by multiple people without affecting each other. The interception process supports filling in titles, fragmented teaching reflection records, etc., and the intercepted micro-videos can be saved in the teacher's personal space to meet the teacher's self-reflection and learning requirements.

Resource statistics analysis: provide personal resource statistics and platform resource statistics respectively.

1. Video resource editing platform

Supports online editing of video lesson resources, users can virtualize and edit videos online, and the edited resources can enter the resource center for management and use as high-quality resources. Video resource editing support:

Station logo: The player can add a station logo, and the station logo format supports PNG image format files.

Mouseover thumbnail: hover the mouse anywhere in the video playback bar, and the thumbnail of the video at the moment will be automatically displayed for users to quickly locate the playback position.

Index: You can add an index to the video, and the user can click the index to automatically play the video at the corresponding time point when watching the video.

Video and document binding: users can add document resources such as teaching plan design, courseware, and reserved exercises in the middle of the video, and bind with the video to form a completed lesson resource package.

1. live class

Classroom live broadcasts that lack evaluation, feedback, and reflection are just video transmissions, and have no obvious effect on improving teachers' professional development and better collaborative teaching and research. Through the three mechanisms of interaction, evaluation and feedback, the platform live classroom overcomes the above-mentioned disadvantages, and transforms the traditional live video into a live classroom with the characteristics of the education industry. Live classroom support:

Live broadcast protocol: support Adobe RTMP protocol for transmitting audio and video streaming media.

Live mode: Provide single-screen movie mode live broadcast and multi-screen resource mode live broadcast. Resource mode live broadcast requires multi-screen live broadcast. The screen includes teacher screen, student screen, panorama screen, and VGA screen. During the live broadcast, you can manually choose to zoom in on a certain screen, or you can select a single screen to display in full screen.

Reservation of recording and broadcasting classrooms: If the school is equipped with recording and broadcasting classrooms, teachers can make online reservations for recording and broadcasting classrooms. According to the reservation information, the system automatically generates a live broadcast list and a live broadcast preview.

Anonymous viewing: The system provides anonymous users with the right to watch live broadcasts to meet the needs of different regions and schools.

Customized appointment time: The system provides users with the ability to choose the start time and end time of the live broadcast. It is not limited to only booking according to the class schedule, which is convenient for users to use flexibly.

Live preview: preview the live broadcast class in advance, and provide advance notice of live broadcast time, course duration, speaker, course name and other information.

Live interaction: During the live broadcast, users who watch the live broadcast at the same time are displayed in a list form, and they can discuss with each other in text similar to the QQ group chat function.

Live Feedback: After the live broadcast event ends, the speaker’s video, evaluation results, and evaluation statistics are automatically associated with the system and uploaded to the personal space of the speaker for the teacher’s reflection.

Analysis of ST teaching behavior: The platform automatically analyzes ST teaching behavior according to the actual classroom situation, automatically analyzes the proportion of teacher behavior, student behavior, and teacher-student interaction in the classroom behavior of this lesson, and automatically draws the Behavior curve; according to the data, automatically analyze which class type is the class among practice, lecture, inquiry, and hybrid, and provide reference for teachers to change the teaching mode. Provide a standard interface to support third-party data generation related charts.

Live time shifted. During the live broadcast, users can pause, rewind, and forward the video, which is convenient for teachers to watch.

Live encryption. You can set a viewing password when booking a live broadcast, and you need to enter the correct password to watch the live broadcast.

1. Famous teacher classroom

Famous Teacher Class is to systematically integrate famous teacher teaching videos, teaching design, courseware and other teaching resources, and present teaching resources through the network platform by famous teachers or special series, so that high-quality resources can be shared and disseminated in a wider range, and the demonstration effect of Famous Teacher Class can be expanded. The public resource platform displays famous teacher resources in series in the form of albums in accordance with the structure of teaching materials, theme resources, etc., which is convenient for junior teachers to observe and learn according to the teaching progress.

Famous teacher classroom support:

Famous teacher management: Managers can edit famous teacher information, upload famous teacher pictures, edit famous teacher profiles, and create famous teacher resource spaces.

Album maintenance: Make different albums according to the teaching material structure, set the album page, album introduction; create the course catalog under the album.

Famous teacher resource management: upload famous teacher resources for each album, and edit relevant course information.

Famous Teacher Resource Pack: Classroom videos under the album can be associated with related courseware, lesson plans, exercises and other documents. Users can directly watch documents online while playing video on demand.

Micro-video interception: Support users to intercept a certain section of the famous teacher's video, and fill in personal comments, reflections and other information. For teachers to observe and study.

1. micro portal

The education cloud micro-portal has multiple functions such as QR code scanning and support for on-demand live commentary. Not only can the official announcement of the school be published, but also the WeChat interactive classroom can be established by using the education cloud micro-portal.

Platform QR code: Users can directly scan the WeChat QR code to log in to the micro-portal; the micro-portal supports live broadcast list, on-demand list and announcement news list.

Play page QR code: Users scan the QR code on the play page to directly enter the specific play page, and support comments on the played video.

Wechat portal live broadcast: support to view the class information of the live broadcast reservation through the micro portal. After the live broadcast starts, you can directly watch the live broadcast through WeChat and post relevant comments at the same time.

On-demand micro-portal: The classification of all resources is displayed through the resource directory, and users can quickly search for and watch videos on demand, and can also post WeChat comments while watching.

Micro-portal and micro-classes: Support users to watch micro-classes online, support classification and screening of resource catalogs for micro-classes, and support comments on micro-classes.

Micro-portal document preview: Users can preview and view the associated teaching design, teaching plans and other document resources online while watching the lesson video. Watch the video play.

Micro-portal sharing and collection: Users can send course videos or live broadcast previews to Moments or push them to designated friends, and can save live broadcast previews and videos for quick viewing.

Micro-portal announcements: Users can also browse the announcements through the micro-portal.

1. theme resources

Users can customize the topic classification of resources, and can submit and publish resources.

Two-level resource classification: The system provides users with two-level resource classification that allows users to add channels and topics, which is convenient for users to implement subdivided management and display of resources.

Submit and publish: Users can submit resources and pass the review, and then publish and display them in the corresponding topic module for other users to learn and watch.

Topic list: The system supports the display of published topics on the homepage. After logging in to the platform, users can directly enter their favorite topics for browsing and on-demand viewing. It provides great convenience for users.

1. live streaming

The live broadcast module can support users to push the live stream through the mobile client, and watch the pushed live video on the WEB side.

Mobile client: support mobile devices with ios and android systems to install clients.

Start the live broadcast on the mobile terminal: through the mobile device client, the user can select the recorded classroom in the list to add live broadcast.

Live viewing: Through the live broadcast initiated by the mobile terminal, you can immediately watch the live stream pushed by the mobile terminal on the web terminal, and support online discussions.

1. announcement

Schools can publish the latest announcements on the homepage of the platform in real time, so that users can keep abreast of the latest activities and prepare in advance.

Announcement editing: The system provides administrators with the ability to edit and modify announcements in the background.

Announcement release: support the rapid release of announcements, and the published announcements are directly displayed on the home page, which is convenient for users to quickly understand.

Announcement list: All published announcement information platforms are displayed in the form of a list. Users can turn pages to view and so on.

Announcement search: The system provides users with a way to quickly retrieve announcements. Users can quickly search by selecting the announcement type and then entering keywords in the announcement title.

1. 1. 1. 1. Normal recording and broadcasting system

For a normal recording and broadcasting classroom, only four hardware modules need to be installed to realize the functions of tracking, positioning, recording and broadcasting, and broadcasting of the entire classroom. The functional modules are introduced as follows:

(1) Touch recording and broadcasting host: The recording and broadcasting host is built on a 10.1-inch capacitive touch screen. By touching the recording and broadcasting host, functions such as full-automatic/semi-automatic/manual guidance switching, recording, and live broadcasting of the screen can be realized . After the class recording is completed, it can be automatically uploaded to the cloud resource platform through the network.

(2) 4K camera: It can intelligently analyze the entire teaching scene, record four high-definition images in real time, including teacher panorama/close-up and student panorama/close-up, and intelligently realize teacher image tracking and student positioning functions.

(3) Omnidirectional pickup microphone: The pickup radius is 6 meters, and the pickup area exceeds 100 square meters. It has a built-in noise reduction function, and can focus on the current speaker without human intervention.

1. 1. 1. 1. 1. System advantage

(1) The fourth generation of image tracking technology - electronic PTZ technology

No need for separate tracking and analysis auxiliary equipment, through two 4K cameras and intelligent tracking algorithms, a total of five channels of 1080P high-definition image output can be realized for teachers' panorama/close-up, student panorama/close-up, and multimedia computers, realizing seamless and smooth switching of five scenes .

(2) Professional audio processing technology

The touch recording host has a built-in digital audio processing module, which supports functions such as volume adjustment, automatic mixing, EQ balance adjustment, echo suppression, and automatic gain. Restore the real sound of the classroom without manual adjustment.

(3) Efficient deployment and convenient operation

Support one-line communication function, between the normalized recording and broadcasting host and 2 high-definition cameras and 1 microphone, only one standard network cable can realize simultaneous interpretation of image and audio signals, control signals, and power supply. Optimize the transmission system, improve deployment efficiency, and reduce failure risks.

(4) Low network bandwidth occupation, greatly reducing the campus network burden

Adopt the High Profile method with the highest intensity in the advanced H.264 video coding algorithm, reduce the network bandwidth by 35~50% while maintaining the original definition, and also save 35~50% of the disk storage space. Support dual-stream technology, flexible configuration from 384K to 50M, suitable for Internet transmission.

(5) Strong scalability

Powerful system expansibility, supports the expansion of interactive functions based on the international standard H.323 protocol and SIP protocol through software upgrades, and realizes the application of remote interactive teaching and research based on the Internet.

(6) Simple maintenance and upgrade

Standardized products, modular equipment, simple wiring, support remote network maintenance and upgrade.

1. 1. 1. 1. 1. system function
               1. Multiple integration

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