zjd_lvbo.m

语音信号滤波程序（低通、带通、多带通、fft卷积滤波 自己动手做的

% --- Executes during object creation, after setting all properties.
function low_CreateFcn(hObject, eventdata, handles)
% hObject    handle to low (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 high_Callback(hObject, eventdata, handles)
high = str2double(get(hObject, 'String'));
if isnan(high)
    set(hObject, 'String', 0);
    errordlg('Input must be a number','Error');
end

% Save the new density value
handles.metricdata.high = high;
guidata(hObject,handles)
% hObject    handle to high (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 high as text
%        str2double(get(hObject,'String')) returns contents of high as a double


% --- Executes during object creation, after setting all properties.
function high_CreateFcn(hObject, eventdata, handles)
% hObject    handle to high (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 pushbutton3.
function pushbutton3_Callback(hObject, eventdata, handles)
a = handles.metricdata.a;
b = handles.metricdata.b;
c = handles.metricdata.c;
d = handles.metricdata.d;
e = handles.metricdata.e;
f = handles.metricdata.f;
[x,fs,bits]=wavread('input.wav');
x=x(:,2);
f=[0 0.99*a ,a b,1.01*b 0.99*c, c d,1.01*d 0.99*e,e f,1.01*f 1];
a=[0 0 ,1 1, 0 0, 1 1,0 0,1 1,0 0];
bb = firpm(20,f,a,'h');   % Bandpass Hilbert
y = filter(bb,1,x);
wavwrite(y,fs,bits,'lvbo.wav');
t=(0:length(y)-1)/fs;
subplot(222);plot(t,y);
sigLength=length(y); 
Y = fft(y,sigLength); 
Pyy = Y.* conj(Y) / sigLength; 
halflength=floor(sigLength/2); 
f=2*(0:halflength)/sigLength; 
subplot(224);plot(f,Pyy(1:halflength+1));
% 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)


% --- Executes on button press in pushbutton4.
function pushbutton4_Callback(hObject, eventdata, handles)
lenN = handles.metricdata.lenN;
[x,fs,bits]=wavread('input.wav');
x=x(:,1);
h = ones(1,lenN)/lenN; 
y = conv(h,x);
wavwrite(y,fs,bits,'lvbo.wav');  
t=(0:length(y)-1)/fs;
subplot(222);plot(t,y);
sigLength=length(y); 
Y = fft(y,sigLength); 
Pyy = Y.* conj(Y) / sigLength; 
halflength=floor(sigLength/2); 
f=2*(0:halflength)/sigLength; 
subplot(224);plot(f,Pyy(1:halflength+1));
% 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)


% --- Executes on button press in pushbutton8.
function pushbutton8_Callback(hObject, eventdata, handles)
prompt={'请输入起始数字通带:','请输入截止数字通带:'};
name='多带通滤波';
numlines=1;
defaultanswer={'0.01','0.1'};
options.Resize='on';
options.WindowStyle='normal';
options.Interpreter='tex';
answer=inputdlg(prompt,name,numlines,defaultanswer,options);
a=str2num(char(answer(1,1)));
b=str2num(char(answer(2,1)));
handles.metricdata.a = a;
handles.metricdata.b = b;
guidata(hObject,handles)
% hObject    handle to pushbutton8 (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 pushbutton9.
function pushbutton9_Callback(hObject, eventdata, handles)
prompt={'请输入起始数字通带:','请输入截止数字通带:'};
name='多带通滤波';
numlines=1;
defaultanswer={'0.2','0.3'};
options.Resize='on';
options.WindowStyle='normal';
options.Interpreter='tex';
answer=inputdlg(prompt,name,numlines,defaultanswer,options);
c=str2num(char(answer(1,1)));
d=str2num(char(answer(2,1)));
handles.metricdata.c = c;
handles.metricdata.d = d;
guidata(hObject,handles)
% hObject    handle to pushbutton9 (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 pushbutton10.
function pushbutton10_Callback(hObject, eventdata, handles)
prompt={'请输入起始数字通带:','请输入截止数字通带:'};
name='多带通滤波';
numlines=1;
defaultanswer={'0.8','0.9'};
options.Resize='on';
options.WindowStyle='normal';
options.Interpreter='tex';
answer=inputdlg(prompt,name,numlines,defaultanswer,options);
e=str2num(char(answer(1,1)));
f=str2num(char(answer(2,1)));
handles.metricdata.e = e;
handles.metricdata.f = f;
guidata(hObject,handles)
% hObject    handle to pushbutton10 (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 pushbutton11.
function pushbutton11_Callback(hObject, eventdata, handles)
[x,fs,bits]=wavread('lvbo.wav');
sound(x,fs,bits); 
time=length(x)/fs;
for i=0:0.1:time;
    set(findobj('tag','jindu2'),'Value',i/time);
    set(findobj('tag','xianshi2'),'String',fix(i));
    pause(0.1);
end;
% hObject    handle to pushbutton11 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)


% --- Executes on slider movement.
function jindu2_Callback(hObject, eventdata, handles)
% hObject    handle to jindu2 (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,'Value') returns position of slider
%        get(hObject,'Min') and get(hObject,'Max') to determine range of slider


% --- Executes during object creation, after setting all properties.
function jindu2_CreateFcn(hObject, eventdata, handles)
% hObject    handle to jindu2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: slider controls usually have a light gray background.
if isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor',[.9 .9 .9]);
end



function edit5_Callback(hObject, eventdata, handles)
lenN = str2double(get(hObject, 'String'));
if isnan(lenN)
    set(hObject, 'String', 0);
    errordlg('Input must be a number','Error');
end

% Save the new density value
handles.metricdata.lenN = lenN;
guidata(hObject,handles)
% hObject    handle to edit5 (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 edit5 as text
%        str2double(get(hObject,'String')) returns contents of edit5 as a double


% --- Executes during object creation, after setting all properties.
function edit5_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit5 (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