【数字信号处理课程设计】基于MATLAB的语音降噪技术、加密解密技术以及GUI成果展示

function varargout = myGui(varargin) % MYGUI MATLAB code for myGui.fig % MYGUI, by itself, creates a new MYGUI or raises the existing % singleton*. % % H = MYGUI returns the handle to a new MYGUI or the handle to % the existing singleton*. % % MYGUI('CALLBACK',hObject,eventData,handles,...) calls the local % function named CALLBACK in MYGUI.M with the given input arguments. % % MYGUI('Property','Value',...) creates a new MYGUI or raises the % existing singleton*. Starting from the left, property value pairs are % applied to the GUI before myGui_OpeningFcn gets called. An % unrecognized property name or invalid value makes property application % stop. All inputs are passed to myGui_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 myGui % Last Modified by GUIDE v2.5 06-Nov-2022 13:02:52 % Begin initialization code - DO NOT EDIT gui_Singleton = 1; %保证只打开一个窗口，为0则可以打开多个窗口 gui_State = struct('gui_Name', mfilename, ... 'gui_Singleton', gui_Singleton, ... 'gui_OpeningFcn', @myGui_OpeningFcn, ... 'gui_OutputFcn', @myGui_OutputFcn, ... 'gui_LayoutFcn', [] , ... 'gui_Callback', []); %该结构描述了该GUI的状况，包括gui的名字、运行实例、初始化函数、输出函数、布局以及回调函数。 if nargin && ischar(varargin{1}) gui_State.gui_Callback = str2func(varargin{1}); %分别取得figure和包含的控件的CreateFcn回调函数，创建各个控件。 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 myGui is made visible. function myGui_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 myGui (see VARARGIN) % Choose default command line output for myGui handles.output = hObject; % Update handles structure guidata(hObject, handles); % UIWAIT makes myGui wait for user response (see UIRESUME) % uiwait(handles.figure1); % --- Outputs from this function are returned to the command line. function varargout = myGui_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 myspeech1 Fs Fs = 44100; t = eval(get(handles.edit1,'String')); %录音时长 recObj = audiorecorder(Fs,16,1); %创建一个录音，调用麦克风 recordblocking(recObj,t); %开始录音 play(recObj); myspeech1 = getaudiodata(recObj); % --- 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) global myspeech1 sound(myspeech1,44100); % --- 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 myspeech1 axes(handles.axes1); %定位到坐标系1 plot((0:length(myspeech1)-1)/44100,myspeech1); %绘制语音信号波形 xlabel('t(s)'); ylabel('幅值'); legend('原始语音波形'); axes(handles.axes2); Y = abs(fft(myspeech1,length(myspeech1))/(length(myspeech1))/2); %频谱分析 f = (0:length(myspeech1)/2-1)*44100/length(myspeech1); %频率 plot(f,Y(1:length(myspeech1)/2)); %绘制语音信号频谱图 xlabel('f(Hz)'); ylabel('幅值'); legend('原始语音频谱'); 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 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 = cellstr(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 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 myspeech x Bz Az wn switch get(handles.popupmenu1,'Value') case 1 x = filter(wn,1,myspeech);% 滤波 case 2 x = filter(Bz, Az, myspeech); 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) global x sound(x,44100); % --- 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) global x axes(handles.axes3); %定位到坐标系3 plot((0:length(x)-1)/44100,x); %绘制语音信号波形 xlabel('t(s)'); ylabel('幅值'); axes(handles.axes4); Y = abs(fft(x,length(x))/(length(x))/2); %频谱分析 f = (0:length(x)/2-1)*44100/length(x); %频率 plot(f,Y(1:length(x)/2)); %绘制语音信号频谱图 xlabel('f(Hz)'); ylabel('幅值'); % --- Executes on button press in pushbutton8. function pushbutton8_Callback(hObject, eventdata, handles) % hObject handle to pushbutton8 (see GCBO) % eventdata res