【语音识别】基于matlab GUI DWT+MFCC数字语音识别【含Matlab源码 2491期】

⛄一、DTW简介

一个应用DTW的说话人识别系统如图8-4所示。它是与文本有关的说话人确认系统。它采用的识别特征是BP FG(附听觉特征处理) ，匹配时采用DTW技术。其特点为：①在结构上基本沿用语音识别的系统。②利用使用过程中的数据修正原模板，即当在某次使用过程
中某说话人被正确确认时使用此时的输人特征对原模板作加权修改(一般用1/10加权)。
这样可使模板逐次趋于完善。
在这里插入图片描述
采样时间间隔为2.5ms，所存的字音模板数为15x16，即15个说话人各自的16个规定音。建立模板时，每个说话人对各字音各发音10次再经适当平均得到上述的各模板。在确认过程中，要求待确认者在他已知的116个字音中任选2~4个。先任选2个字，将2个字所得的“计分”(距离的倒数)相加，若已超过判决逻辑中所设定的阈值则予以肯定。否则，令待确认者另选16个字中其它字音并将计分加权累计，直到共发4个字音。若仍未达到阈值，则给以拒绝。
这里提供一个典型的实验结果：对于1732个真的待确认者，经此系统的错误拒绝率为
0.6%；对于630个假的待证实者，错误接受率为0.3%。当然，适当改变阈值可以调整这
两种比率。

⛄二、部分源代码

function varargout = main(varargin)
% MAIN MATLAB code for main.fig
% MAIN, by itself, creates a new MAIN or raises the existing
% singleton*.
%
% H = MAIN returns the handle to a new MAIN or the handle to
% the existing singleton*.
%
% MAIN(‘CALLBACK’,hObject,eventData,handles,…) calls the local
% function named CALLBACK in MAIN.M with the given input arguments.
%
% MAIN(‘Property’,‘Value’,…) creates a new MAIN or raises the
% existing singleton*. Starting from the left, property value pairs are
% applied to the GUI before main_OpeningFcn gets called. An
% unrecognized property name or invalid value makes property application
% stop. All inputs are passed to main_OpeningFcn via varargin.
%
% *See GUI Options on GUIDE’s Tools menu. Choose “GUI allows only one
% instance to run (singleton)”.
%
% See also: GUIDE, GUIDATA, GUIHANDLES

% Edit the above text to modify the response to help main

% Last Modified by GUIDE v2.5 23-Jun-2022 23:03:34

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct(‘gui_Name’, mfilename, …
‘gui_Singleton’, gui_Singleton, …
‘gui_OpeningFcn’, @main_OpeningFcn, …
‘gui_OutputFcn’, @main_OutputFcn, …
‘gui_LayoutFcn’, [] , …
‘gui_Callback’, []);
if nargin && ischar(varargin{1})
gui_State.gui_Callback = str2func(varargin{1});
end

if nargout
[varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT

% — Executes just before main is made visible.
function main_OpeningFcn(hObject, ~, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject handle to figure
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% varargin command line arguments to main (see VARARGIN)

% Choose default command line output for main
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes main wait for user response (see UIRESUME)
% uiwait(handles.figure1);

% — Outputs from this function are returned to the command line.
function varargout = main_OutputFcn(~, ~, handles)
% varargout cell array for returning output args (see VARARGOUT);
% hObject handle to figure
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

% Get default command line output from handles structure
varargout{1} = handles.output;