基于MATLAB GUI的IIR数字滤波器语音信号去噪处理平台的设计与实现-M文件.7z

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 25-Dec-2017 23:52:39 % 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, 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 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(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) %---------------------------利用函数wavread对语音信号的采集--------------------------------% global wav_in; global wav_in_1; global Fs; global bits; global n; global f1; [filename pathname]=uigetfile({'*.wav'}, 'File Selector'); [wav_in,Fs,bits] = wavread([pathname '\' filename]); handles.wav_in = wav_in; guidata(hObject, handles); axes(handles.axes1); % aa=abs(fftshift(wav_in)); % plot(aa);title('') N=length(wav_in); n=0:N-1; plot(n,wav_in); %画出原始语音信号的波形 xlabel('n'); ylabel('x(n)'); title('原始语音信号'); f1=fft(wav_in,N); %对语音号进行快速傅里叶变换,得出频谱 % GX=fft(wav_in,512); sound(wav_in,Fs); function pushbutton2_Callback(hObject, eventdata, handles) % hObject handle to pushbutton2 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) global wav_in; global wav_in_1; global Fs; global bits; global n; global f1; % SNR=40; % wav_in=awgn(wav_in,SNR); y1=fft(wav_in,512); f=Fs*(0:511)/512; Au=0.03; wav_in=wav_in(:,1); t=0:1/Fs:(size(wav_in)-1)/Fs;%将所加噪声信号的点数调整到与原始信号相同 d=[Au*cos(2*pi*5000*t)]';%噪声为5kHz的余弦信号 wav_in_1=10*wav_in+d; y2=fft(wav_in_1,512); handles.wav_in = wav_in_1;% ¨¨¨ guidata(hObject, handles); axes(handles.axes2); plot(t,wav_in_1) title('加噪后的信号'); xlabel('time n'); ylabel('fuzhi n'); guidata(hObject, handles); axes(handles.axes3); plot(abs(n),abs(f1)); xlabel('k'); ylabel('|y(k)|'); title('FFT后的波形'); % guidata(hObject, handles); % axes(handles.axes3); % plot(f,abs(y1(1:512))); % title('原始语音信号频谱'); % xlabel('Hz'); % ylabel('fuzhi'); guidata(hObject, handles); axes(handles.axes4); plot(f,abs(y2(1:512))); title('加噪后的信号频谱'); xlabel('Hz'); ylabel('fuzhi'); sound(wav_in_1,Fs); % --- Executes on button press in pushbutton3. function pushbutton3_Callback(hObject, eventdata, handles) % hObject handle to pushbutton3 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) global wav_in; global wav_in_1; global Fs; global bits; mc(wav_in_1,Fs,bits,hObject, handles) % --- Executes on button press in pushbutton4. function pushbutton4_Callback(hObject, eventdata, handles) % hObject handle to pushbutton4 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) global wav_in; global wav_in_1; global Fs; global bits; sx(wav_in_1,Fs,bits,hObject, handles) function edit1_Callback(hObject, eventdata, handles) % hObject handle to edit1 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) % Hints: get(hObject,'String') returns contents of edit1 as text % str2double(get(hObject,'String')) returns contents of edit1 as a double % --- Executes during object creation, after setting all properties. function edit1_CreateFcn(hObject, eventdata, handles) % hObject handle to edit1 (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 % --- Executes on button press in pushbutton6. function pushbutton6_Callback(hObject, eventdata, handles) % hObject handle to pushbutton6 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) close(gcf);