We all know that Microsoft Teams 1080P video quality to achieve results, and adaptive network based on the client reduced quality video picture resolution to protect the entire conversation shared fluency.
Teams then the conference series first blog just like to emphasize the importance Teams conferencing network connection, just recently delivered several projects Teams meeting, talk to everyone to share in-depth network requirements Teams meeting, as well as some of the best practice, the ultimate goal is to make better quality conference Teams!
The article mentions Teams Rooms and Teams client meeting the same overall effect environment that much difference, if used Teams client and Office365 subscribers over 500'd be free to apply for Azure Express Route to improve the quality of the meeting, then in addition there are other solution? The answer is yes!
Let me share with you two things:
1, the media bit rate (KB)
2, Teams bandwidth requirements
We first look at Microsoft bandwidth requirements Teams is how to say, can be found at the following website (in fact there mentioned in Teams conference series first blog, here again the detailed recap)
https://docs.microsoft.com/en-us/microsoftteams/prepare-network#bandwidth-requirements
For easy viewing, I intercepted the original Microsoft's official website, the following
Note the picture above, high-definition audio and video outside the red box are point to point and shared downlink bandwidth requirements of Skype for Business familiar to you much they should be able to understand the requirements are relatively low, because the audio and video transmission point of fact, do not go server, Teams also follows this strategy. The focus of our look at the contents inside the red Marina:
To initiate a Teams audio and video conferencing, the minimum requirement: up 500KB, 1MB speed downlink network, where video quality is not how high the requirements
要发起一个高清的Teams音视频会议，最低要求是：上行1MB，下行2MB的网络速度，最重要的是看最后括号里面的说明：这个网络速度只能在1920*1080分辨率的显示器上呈现540P的视频质量，是不是觉得很坑！很多人第一眼肯定只看到了HD高清音视频，而忽略了括号里面的说明，其实只有540P！！！
同时，要达到以上的效果，还要有另外一个前提条件就是网络丢包率，这个可以从Teams会议系列第一篇博客中找到要求的最低丢包率。
以上是第一个要分享的重要知识点，下面我们再来看下媒体比特率（Media bit rate）
这是个什么鬼呢？在Teams中这个是一个用户策略（严格意义上讲应该是一个Meeting Policy），用于确定每个用户的呼叫或者音视频会议传输的媒体比特率，换句话说这个策略直接决定了最终用户在Teams会议中的音视频质量。
那么什么是比特率呢？
比特率是指每秒传送的比特(bit)数。单位为 bps(Bit Per Second)，比特率越高，每秒传送数据就越多，画质就越清晰。声音中的比特率是指将模拟声音信号转换成数字声音信号后，单位时间内的二进制数据量，是间接衡量音频质量的一个指标。 视频中的比特率（码率）原理与声音中的相同，都是指由模拟信号转换为数字信号后，单位时间内的二进制数据量。比特率的单位为比特/秒(bit/s或bps)、千比特/秒（kbit/s或kbps，k=1000）或兆比特/秒（Mbit/s或Mbps，M=1000000）。比特率越高，表示单位时间传送的数据就越多。
Here it should also explain to understand this higher bit rates then our end-user audio and video quality will be better! Teams then inside this unit, what is it? And where to set it? If you are an administrator or you are a global Office365 Teams administrator, then go directly to the management center Teams: https://admin.teams.microsoft.com then turn into the "conference" - "strategy meeting" At this point you can choose to create a new policy or select "global policies" - "media bit rate", the default unit is KB, the value is 50,000, conversion out of about 49MB, which means your downstream speed requirements go almost to the requirements of 4mb / s, integrated above Why network bandwidth requirements will also be able to explain through open Teams in the general meeting quality laptop well, Teams just go to a meeting on the resolution of 1080P or higher resolution monitor quality is very blurred.
Can be seen from the strategy, Teams set this threshold, your immediate network downlink speeds higher than 5Mb / s the quality of your Teams meeting also high up, contrary if your immediate network bandwidth downlink speed reached 5Mb / s, If there are fluctuations in the quality of your network Teams conference will fall!
So at this time if it is to open a high-quality audio and video conferencing Teams, then it must ensure that the network downlink speeds of at least 10Mb / s, in other words you have to have at least 100MB of broadband lines support (not the entire network bandwidth requirements , Teams program is to use the network downlink speed, how important is configured here QOS ah!)
With the support of bandwidth, then you can go and change this policy, and will direct the media to set the bit rate of 100,000 or more, the current can be set up 99999999
If your network bandwidth is below the threshold set in the policy of the customer will be prompted Teams: poor network quality. If your network bandwidth is not high enough to instantly set up such a high bit-rate media value Microsoft will automatically give you down, as shown below illustrates
Once you've created a strategy can assign policies to different users to adapt to different network bandwidth requirements (So now understand why the strict sense of this strategy is meeting right)