语音信号的采集和处理 matlab

function varargout = gangbadai(varargin) % GANGBADAI M-file for gangbadai.fig % GANGBADAI, by itself, creates a new GANGBADAI or raises the existing % singleton*. % % H = GANGBADAI returns the handle to a new GANGBADAI or the handle to % the existing singleton*. % % GANGBADAI('CALLBACK',hObject,eventData,handles,...) calls the local % function named CALLBACK in GANGBADAI.M with the given input arguments. % % GANGBADAI('Property','Value',...) creates a new GANGBADAI or raises the % existing singleton*. Starting from the left, property value pairs are % applied to the GUI before gangbadai_OpeningFcn gets called. An % unrecognized property name or invalid value makes property application % stop. All inputs are passed to gangbadai_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 gangbadai % Last Modified by GUIDE v2.5 17-Nov-2012 12:26:04 % Begin initialization code - DO NOT EDIT gui_Singleton = 1; gui_State = struct('gui_Name', mfilename, ... 'gui_Singleton', gui_Singleton, ... 'gui_OpeningFcn', @gangbadai_OpeningFcn, ... 'gui_OutputFcn', @gangbadai_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 gangbadai is made visible. function gangbadai_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 gangbadai (see VARARGIN) % Choose default command line output for gangbadai handles.output = hObject; % Update handles structure guidata(hObject, handles); % UIWAIT makes gangbadai wait for user response (see UIRESUME) % uiwait(handles.figure1); % --- Outputs from this function are returned to the command line. function varargout = gangbadai_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) %he=get(handles.edit2,'string'); [filename,pathname]=uigetfile('*.wav','选择一个声音文件'); voice=[pathname,filename]; [y,fs,nbits]=wavread(voice); N= length(y) % [y,fs,nbits]=wavread('E:\kaoyan.wav'); set(handles.edit2,'string',fs); set(handles.edit3,'string',N);%%%131072是2的17次方 axes(handles.axes1); plot(y);grid; title('原始信号时域波形'); axes(handles.axes2); w = linspace(-fs/2,fs/2,N); plot(w,fftshift(abs(fft(y))));grid; title('原始信号频域波形'); setappdata(handles.figure1,'y',y); setappdata(handles.figure1,'fs',fs); setappdata(handles.figure1,'nbits',nbits); setappdata(handles.figure1,'N',N); % --- Executes on button press in pushbutton2. 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) %b1=getappdata(handles.figure1,'b1'); y=getappdata(handles.figure1,'y'); fs=getappdata(handles.figure1,'fs'); nbits=getappdata(handles.figure1,'nbits'); sound(y,fs,nbits); function edit2_Callback(hObject, eventdata, handles) % hObject handle to edit2 (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 edit2 as text % str2double(get(hObject,'String')) returns contents of edit2 as a double % --- Executes during object creation, 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 function edit3_Callback(hObject, eventdata, handles) % hObject handle to edit3 (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 edit3 as text % str2double(get(hObject,'String')) returns contents of edit3 as a double % --- Executes during object creation, after setting all properties. function edit3_CreateFcn(hObject, eventdata, handles) % hObject handle to edit3 (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 pushbutton5. function pushbutton5_Callback(hObject, eventdata, handles) % hObject handle to pushbutton5 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) N=getappdata(handles.figure1,'N'); b=getappdata(handles.figure1,'b'); y=getappdata(handles.figure1,'y'); fs=getappdata(handles.figure1,'fs'); nbits=getappdata(handles.figure1,'nbits'); b1=filter(b,1,y); axes(handles.axes1); plot(b1); title('滤波信号时域波形'); axes(handles.axes2); w = linspace(-fs/2,fs/2,N); plot(w,fftshift(abs(fft(b1)))); title('滤波信号频域波形'); % sound(b1,fs); setappdata(handles.figure1,'b1',b1); % --- Executes on selection change in xiala. function xiala_Callback(hObject, eventdata, handles) % hObject handle to xiala (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) % Hints: contents = cellstr(get(hObject,'String')) returns xiala contents as cell array % contents{get(hObject,'Value')} returns selected item from xiala value=get(handles.xiala,'value'); y=getappdata(handles.figure1,'y'); switch value case 2 Ft=4000; Fp=get(handles.edit_3,'string') ; Fp=str2num(Fp); Fs=get(handles.edit_4,'string'); Fs=str2num(Fs); wp=2*Fp/Ft; ws=2*Fs/Ft; As=get(handles.edit_1,'string');As=str2num(As); wdel = ws - wp; %过渡带宽 Wn = (wp + ws)/2 ; %截止频率即Wc % N取奇数 M=ceil((As-7.95)/(2.285*wdel)+1)+1; axes(handles.axes3); b = fir1(M-1,Wn,kaiser(M,11)); [h1,w1]=freqz(b,1); plot(w1/pi,20*log10(abs(h1))); axis([0,1,-140,10]); grid; xlabel('归一化频率/p') ; ylabel('幅度/dB') ; case 3 Ft=20000; %最高截止频率要低于2000 Fp=get(handles.edit_4,'string') ; Fp=str2num(Fp);