【滤波器】基于汉宁窗FIR滤波器实现语音信号加噪去噪含Matlab源码

function varargout = filter_config(varargin) % FILTER_CONFIG M-file for filter_config.fig % FILTER_CONFIG, by itself, creates a new FILTER_CONFIG or raises the existing % singleton*. % % H = FILTER_CONFIG returns the handle to a new FILTER_CONFIG or the handle to % the existing singleton*. % % FILTER_CONFIG( ’CALLBACK’ ,hObject,eventData,handles,...) calls the local % function named CALLBACK in FILTER_CONFIG.M with the given input arguments. % % FILTER_CONFIG( ’Property’ , ’Value’ ,...) creates a new FILTER_CONFIG or raises the % existing singleton*. Starting from the left, property value pairs are % applied to the GUI before filter_config_OpeningFcn gets called. An % unrecognized property name or invalid value makes property application % stop. All inputs are passed to filter_config_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 filter_config % Last Modified by GUIDE v2.5 20-Nov-2012 22:45:50 % Begin initialization code - DO NOT EDIT gui_Singleton = 1; gui_State = struct(’gui_Name’, mfilename, ... ’gui_Singleton’, gui_Singleton, ... ’gui_OpeningFcn’, @filter_config_OpeningFcn, ... ’gui_OutputFcn’, @filter_config_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 filter_config is made visible. function filter_config_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 filter_config (see VARARGIN) % Choose default command line output for filter_config handles.output = hObject; % Update handles structure guidata(hObject, handles); % UIWAIT makes filter_config wait for user response (see UIRESUME) % uiwait(handles.panal1); % --- Outputs from this function are returned to the command line. function varargout = filter_config_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; axes(handles.axes1); plot(20*log10(abs(fft(bs)))); axis([0 3*Wn -inf inf]); axes(handles.axes2); plot(angle(fft(bs))); axis([-inf inf -inf inf]); setappdata(handles.panal1,’bl1’,bl1); setappdata(handles.panal1,’bl2’,bl2); setappdata(handles.panal1,’bf_window’,bf_window); setappdata(handles.panal1,’bh’,bh); setappdata(handles.panal1,’bs’,bs); setappdata(handles.panal1,’Wn’,Wn); setappdata(0,’bs’,bs); setappdata(0,’bh’,bh); setappdata(0,’bl1’,bl1); % --- 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) % --- Executes on button press in close. function close_Callback(hObject, eventdata, handles) % hObject handle to close (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) clc; close filter_config; function Wn_Callback(hObject, eventdata, handles) % hObject handle to Wn (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 Wn as text % str2double(get(hObject,’ String ’)) returns contents of Wn as a double % --- Executes during object creation, after setting all properties. function Wn_CreateFcn(hObject, eventdata, handles) % hObject handle to Wn (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 band_Callback(hObject, eventdata, handles) % hObject handle to band (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 band as text % str2double(get(hObject,’ String ’)) returns contents of band as a double % --- Executes during object creation, after setting all properties. function band_CreateFcn(hObject, eventdata, handles) % hObject handle to band (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 Wdel_Callback(hObject, eventdata, handles) % hObject handle to Wdel (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 Wdel as text % str2double(get(hObject,’ String ’)) returns contents of Wdel as a double % --- Executes during object creation, after setting all properties. function Wdel_CreateFcn(hObject, eventdata, handles) % hObject handle to Wdel (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 selection change in filter_choose. function filter_choose_Callback(hObject, eventdata, handles) % hObject handle to filter_choose (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 filter_choose contents as cell array % contents{get(hObject,’ Value ’)} returns selected item from filter_choose bl1=getappdata(handles.panal1,’bl1’); bl2=getappdata(handles.panal1,’bl2’); bf_window=getappdata(handles.panal1,’bf_window’); bh=getappdata(handles.panal1,’bh’); bs=getappdata(handles.panal1,’bs’); Wn=getappdata(handles.panal1,’Wn’); select=get(handles.filter_choose,’value’); switch select case 1 axes(handles.axes1); plot(20*log10(abs(fft(bs)))); axis([0 3*Wn -40 1]); axes(handles.axes2); plot(angle(fft(bs))); axis([0 Wn -4 1]); case 2 axes(handles.axes1); plot(20*log10(abs(fft(bl1)))); axis([0 3*Wn -40 1]); axes(handles.axes2); plot(angle(fft(bl1))); axis([0 Wn -4 1]); case 3 axes(handles.axes1); plot(20*log10(abs(fft(bl2)))); axis([0 3*Wn -40 1]); axes(handles.axes2); plot(angle(fft(bl2))); axis([0 Wn -4 1]); case 4 axes(handles.axes1); plot(20*log10(abs(fft(bf_window)))); axis([0 3*Wn -40 1]); axes(handles.axes2); plot(angle(fft(bf_window))); axis([0 Wn -4 1]); case 5 axes(handles.axes1); plot(20*log10(abs(fft(bh)))); axis([0 3*Wn -40 1]); axes(handles.axes2); plot(angle(fft(bh))); axis([Wn 2*Wn -4 1]); end % --- Executes during object creation, after setting all properties. function filter_choose_CreateFcn(hObject, eventdata, handles) % hObject handle to filter_choose (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