Matlab【特征提取】心音信号特征提取Matlab系统

原创

matlab科研助手 2022-03-15 10:27:56 博主文章分类：信号处理 ©著作权

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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 EDIT
gui_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_2
handles.output = hObject;
% Update handles structure
guidata(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 structure
varargout{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