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①Matlab语音处理（进阶版）
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⛄一、语音处理简介
MATLAB GUI是用户与计算机或计算机程序的接触点或交互方式,是用户与计算机进行信息交流的方式。图形用户界面（Graphical User Interfaces,GUI）则是由窗口、光标、按键、菜单、文字说明等对象（Object）构成的一个用户界面。用户通过一定的方法（如鼠标或键盘）选择、激活这些图形对象,使计算机产生某种动作或变化,比如实现计算、绘图等。本设计基于MATLAB GUI技术,完成了语音信号处理的界面平台,可进行语音的选取、线性预测分析（LPC）、语谱图、频谱等相关波形的显示。这样可以更直观、更方便地分析和处理语音信号,得到用户需要的实验结果。
具体理论知识参考：基于MATLAB GUI的语音处理界面设计
⛄二、部分源代码
function varargout = yonghujiemain(varargin)
% YONGHUJIEMAIN M-file for yonghujiemain.fig
% YONGHUJIEMAIN, by itself, creates a new YONGHUJIEMAIN or raises the existing
% singleton*.
%
% H = YONGHUJIEMAIN returns the handle to a new YONGHUJIEMAIN or the handle to
% the existing singleton*.
%
% YONGHUJIEMAIN(‘CALLBACK’,hObject,eventData,handles,…) calls the local
% function named CALLBACK in YONGHUJIEMAIN.M with the given input arguments.
%
% YONGHUJIEMAIN(‘Property’,‘Value’,…) creates a new YONGHUJIEMAIN or raises the
% existing singleton*. Starting from the left, property value pairs are
% applied to the GUI before yonghujiemain_OpeningFunction gets called. An
% unrecognized property name or invalid value makes property application
% stop. All inputs are passed to yonghujiemain_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 yonghujiemain
% Last Modified by GUIDE v2.5 02-Jan-2021 16:50:18
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct(‘gui_Name’, mfilename, …
‘gui_Singleton’, gui_Singleton, …
‘gui_OpeningFcn’, @yonghujiemain_OpeningFcn, …
‘gui_OutputFcn’, @yonghujiemain_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 yonghujiemain is made visible.
function yonghujiemain_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 yonghujiemain (see VARARGIN)
% Choose default command line output for yonghujiemain
handles.output = hObject;
% Update handles structure
guidata(hObject, handles);
% UIWAIT makes yonghujiemain wait for user response (see UIRESUME)
% uiwait(handles.figure1);
% — Outputs from this function are returned to the command line.
function varargout = yonghujiemain_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 turn_down.
function turn_down_Callback(hObject, eventdata, handles)
% hObject handle to turn_down (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% — Executes on button press in turn_up.
function turn_up_Callback(hObject, eventdata, handles)
% hObject handle to turn_up (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% — Executes on selection change in popupmenu1.
function popupmenu1_Callback(hObject, eventdata, handles)
% hObject handle to popupmenu1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hints: contents = get(hObject,‘String’) returns popupmenu1 contents as cell array
% contents{get(hObject,‘Value’)} returns selected item from popupmenu1
% — Executes during object creation, after setting all properties.
function popupmenu1_CreateFcn(hObject, eventdata, handles)
% hObject handle to popupmenu1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
% Hint: popupmenu 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
% — Executes on button press in speed_up.
function speed_up_Callback(hObject, eventdata, handles)
% hObject handle to speed_up (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% — Executes on button press in slow_down.
function slow_down_Callback(hObject, eventdata, handles)
% hObject handle to slow_down (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% — Executes on selection change in popupmenu2.
function popupmenu2_Callback(hObject, eventdata, handles)
% hObject handle to popupmenu2 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hints: contents = get(hObject,‘String’) returns popupmenu2 contents as cell array
% contents{get(hObject,‘Value’)} returns selected item from popupmenu2
% — Executes during object creation, after setting all properties.
function popupmenu2_CreateFcn(hObject, eventdata, handles)
% hObject handle to popupmenu2 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
% Hint: popupmenu 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
% — Executes on button press in insert.
function insert_Callback(hObject, eventdata, handles)
% hObject handle to insert (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
global fn x Fs bits;
[fn,dirpath]=uigetfile(‘*.wav’);
[x,Fs,bits] = wavread(fn);
t=(0:length(x)-1)/Fs;
plot(handles.axes1,t,x);
legend(‘Waveform’);
xlabel( ‘Time(s)’);
ylabel(‘Amplitude’);
xlength=length(x);
y=fft(x,xlength);
Pyy =y.conj(y)/xlength;
f = 22050(0:(xlength/2))/xlength;
plot(handles.axes2,f,Pyy(1:xlength/2+1));
title(‘Frequency content of y’);
xlabel(‘frequency (Hz)’);
% — Executes on button press in play.
function play_Callback(hObject, eventdata, handles)
% hObject handle to play (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
global x Fs bits;
sound(x,Fs,bits);
% — Executes on button press in save.
function save_Callback(hObject, eventdata, handles)
% hObject handle to save (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
global x;
[filname,pathname]=uiputfile(‘.wav’);
wavwrite(x,22050,8,filname);
% — Executes on button press in radiobutton1.
function radiobutton1_Callback(hObject, eventdata, handles)
% hObject handle to radiobutton1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hint: get(hObject,‘Value’) returns toggle state of radiobutton1
% — Executes on button press in radiobutton2.
function radiobutton2_Callback(hObject, eventdata, handles)
% hObject handle to radiobutton2 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hint: get(hObject,‘Value’) returns toggle state of radiobutton2
% — Executes on button press in fuwei.
function fuwei_Callback(hObject, eventdata, handles)
% hObject handle to fuwei (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
global fn x Fs bits;
[x,Fs,bits] = wavread(fn);
t=(0:length(x)-1)/Fs;
plot(handles.axes1,t,x);
legend(‘Waveform’);
xlabel( ‘Time(s)’);
ylabel(‘Amplitude’);
xlength=length(x);
y=fft(x,xlength);
Pyy =y.conj(y)/xlength;
f = 22050(0:(xlength/2))/xlength;
plot(handles.axes2,f,Pyy(1:xlength/2+1));
title(‘Frequency content of y’);
xlabel(‘frequency (Hz)’);
% — Executes on button press in daofang.
function daofang_Callback(hObject, eventdata, handles)
% hObject handle to daofang (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
global x Fs ;
i=1:length(x);
j=length(x)👎1;
x_reversal(j)=x(i); %实现声音数据颠倒
t=(0:length(x)-1)/Fs;
plot(handles.axes1,t,x);
title(‘original signal’);
xlabel( ‘Time(s)’);
ylabel(‘Amplitude’);
plot(handles.axes2,t,x_reversal);
title(‘reversal signal’);
xlabel( ‘Time(s)’);
ylabel(‘Amplitude’);
x=x_reversal;
⛄三、运行结果
⛄四、matlab版本及参考文献
1 matlab版本
2014a
2 参考文献
[1]韩纪庆,张磊,郑铁然.语音信号处理（第3版）[M].清华大学出版社，2019.
[2]柳若边.深度学习:语音识别技术实践[M].清华大学出版社，2019.
[3]宋云飞,姜占才,魏中华.基于MATLAB GUI的语音处理界面设计[J].科技信息. 2013,(02)
3 备注
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