Matlab【特征提取】心音信号特征提取Matlab系统

1 简介

​语音识别是处理语音信号的重要问题,当今社会,人工智能技术发展迅速,语音识别技术已经发展成为行业领域前列的先进技术.在以后的发展过程语音识别技术仍将发挥重大作用.语音信号是一种冗余度较高的非平稳随机信号,只有在短时间内才认为变化时缓慢的,在这个短的时间区间内语音信号特征保持稳定.因此,本课题提取小波变换、EMD分解、MEL倒谱特征、傅里叶变换信号。

2 部分代码

function varargout = GUI_2(varargin)% GUI_2 MATLAB code for GUI_2.fig%      GUI_2, by itself, creates a new GUI_2 or raises the existing%      singleton*.%%      H = GUI_2 returns the handle to a new GUI_2 or the handle to%      the existing singleton*.%%      GUI_2('CALLBACK',hObject,eventData,handles,...) calls the local%      function named CALLBACK in GUI_2.M with the given input arguments.%%      GUI_2('Property','Value',...) creates a new GUI_2 or raises the%      existing singleton*.  Starting from the left, property value pairs are%      applied to the GUI before GUI_2_OpeningFcn gets called.  An%      unrecognized property name or invalid value makes property application%      stop.  All inputs are passed to GUI_2_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 GUI_2% Last Modified by GUIDE v2.5 29-Jan-2022 11:02:32% Begin initialization code - DO NOT EDITgui_Singleton = 1;gui_State = struct('gui_Name',       mfilename, ...                   'gui_Singleton',  gui_Singleton, ...                   'gui_OpeningFcn', @GUI_2_OpeningFcn, ...                   'gui_OutputFcn',  @GUI_2_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 GUI_2 is made visible.function GUI_2_OpeningFcn(hObject, eventdata, 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 GUI_2 (see VARARGIN)% Choose default command line output for GUI_2handles.output = hObject;% Update handles structureguidata(hObject, handles);% UIWAIT makes GUI_2 wait for user response (see UIRESUME)% uiwait(handles.figure1);​% --- Outputs from this function are returned to the command line.function varargout = GUI_2_OutputFcn(hObject, eventdata, 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 structurevarargout{1} = handles.output;​% --- Executes on button press in pushbutton1.function pushbutton1_Callback(hObject, eventdata, handles)% hObject    handle to pushbutton1 (see GCBO)% eventdata  reserved - to be defined in a future version of MATLAB% handles    structure with handles and user data (see GUIDATA)global str;global s1;global fs1;[filename,pathname]=...    uigetfile({'*.wav';'*.bmp';'*.gif'},'choose');str=[pathname filename];[s1,fs1] = audioread(str);%读取figure(1)s1=s1(1:3000,:);plot(s1)title('心音信号')% --- Executes on button press in pushbutton2.on, after setting all properties.function edit2_CreateFcn(hObject, eventdata, handles)% hObject    handle to edit2 (see GCBO)% eventdata  reserved - to be defined in a future version of MATLAB% handles    empty - handles not created until after all CreateFcns called% Hint: edit controls usually have a white background on Windows.%       See ISPC and COMPUTER.if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))    set(hObject,'BackgroundColor','white');end​

3 仿真结果

4 参考文献

[1]董梅, 廖云霞, 刘海山,等. 基于Matlab的语音信号特征提取系统的设计[J]. 电脑知识与技术：学术版, 2018(7Z):4.

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