dif_fft.m

用matlab实现的DTMF解码3种算法

function varargout = dif_fft(varargin)
% DIF_FFT M-file for dif_fft.fig
%      DIF_FFT, by itself, creates a new DIF_FFT or raises the existing
%      singleton*.
%
%      H = DIF_FFT returns the handle to a new DIF_FFT or the handle to
%      the existing singleton*.
%
%      DIF_FFT('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in DIF_FFT.M with the given input arguments.
%
%      DIF_FFT('Property','Value',...) creates a new DIF_FFT or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before dif_fft_OpeningFunction gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to dif_fft_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 dif_fft

% Last Modified by GUIDE v2.5 19-Jan-2008 21:43:30

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @dif_fft_OpeningFcn, ...
                   'gui_OutputFcn',  @dif_fft_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin & isstr(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 dif_fft is made visible.
function dif_fft_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 dif_fft (see VARARGIN)

% Choose default command line output for dif_fft
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes dif_fft wait for user response (see UIRESUME)
% uiwait(handles.figure1);


% --- Outputs from this function are returned to the command line.
function varargout = dif_fft_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 b1.
function b1_Callback(hObject, eventdata, handles)
% hObject    handle to b1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

n=0:255;
fs=8000;
f1=697;f2=1209;
N=256;
y1=sin(2*pi*f1*n/fs);
y2=sin(2*pi*f2*n/fs);
yn=y1+y2;
sound(yn,fs)
axes(handles.fig1);
plot(n,yn);
set(handles.fig1,'XMinorTick','on');
title('DTMF Input');xlabel('Time');
ylabel('Amplitude');grid;
fft1;
% --- Executes on button press in b2.
function b2_Callback(hObject, eventdata, handles)
% hObject    handle to b2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
n=0:255;
fs=8000;
f1=697;f2=1336;
N=256;
y1=sin(2*pi*f1*n/fs);
y2=sin(2*pi*f2*n/fs);
yn=y1+y2;
sound(yn,fs)
axes(handles.fig1);
plot(n,yn);
set(handles.fig1,'XMinorTick','on');
title('DTMF Input');xlabel('Time');
ylabel('Amplitude');grid;
fft1;

% --- Executes on button press in A.
function A_Callback(hObject, eventdata, handles)
% hObject    handle to A (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

n=0:255;
fs=8000;
f1=697;f2=1633;
N=256;
y1=sin(2*pi*f1*n/fs);
y2=sin(2*pi*f2*n/fs);
yn=y1+y2;
sound(yn,fs)
axes(handles.fig1);
plot(n,yn);
set(handles.fig1,'XMinorTick','on');
title('DTMF Input');xlabel('Time');
ylabel('Amplitude');grid;
fft1;
% --- Executes on button press in b3.
function b3_Callback(hObject, eventdata, handles)
% hObject    handle to b3 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
n=0:255;
fs=8000;
f1=697;f2=1477;
N=256;
y1=sin(2*pi*f1*n/fs);
y2=sin(2*pi*f2*n/fs);
yn=y1+y2;
sound(yn,fs)
axes(handles.fig1);
plot(n,yn);
set(handles.fig1,'XMinorTick','on');
title('DTMF Input');xlabel('Time');
ylabel('Amplitude');grid;
fft1;

% --- Executes on button press in b4.
function b4_Callback(hObject, eventdata, handles)
% hObject    handle to b4 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
n=0:255;
fs=8000;
f1=770;f2=1209;
N=256;
y1=sin(2*pi*f1*n/fs);
y2=sin(2*pi*f2*n/fs);
yn=y1+y2;
sound(yn,fs)
axes(handles.fig1);
plot(n,yn);
set(handles.fig1,'XMinorTick','on');
title('DTMF Input');xlabel('Time');
ylabel('Amplitude');grid;
fft1;

% --- Executes on button press in b5.
function b5_Callback(hObject, eventdata, handles)
% hObject    handle to b5 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
n=0:255;
fs=8000;
f1=770;f2=1336;
N=256;
y1=sin(2*pi*f1*n/fs);
y2=sin(2*pi*f2*n/fs);
yn=y1+y2;
sound(yn,fs)
axes(handles.fig1);
plot(n,yn);
set(handles.fig1,'XMinorTick','on');
title('DTMF Input');xlabel('Time');
ylabel('Amplitude');grid;
fft1;


% --- Executes on button press in B.
function B_Callback(hObject, eventdata, handles)
% hObject    handle to B (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
n=0:255;
fs=8000;
f1=770;f2=1633;
N=256;
y1=sin(2*pi*f1*n/fs);
y2=sin(2*pi*f2*n/fs);
yn=y1+y2;
sound(yn,fs)
axes(handles.fig1);
plot(n,yn);
set(handles.fig1,'XMinorTick','on');
title('DTMF Input');xlabel('Time');
ylabel('Amplitude');grid;
fft1;


% --- Executes on button press in b6.
function b6_Callback(hObject, eventdata, handles)
% hObject    handle to b6 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
n=0:255;
fs=8000;
f1=770;f2=1477;
N=256;
y1=sin(2*pi*f1*n/fs);
y2=sin(2*pi*f2*n/fs);
yn=y1+y2;
sound(yn,fs)
axes(handles.fig1);
plot(n,yn);
set(handles.fig1,'XMinorTick','on');
title('DTMF Input');xlabel('Time');
ylabel('Amplitude');grid;
fft1;


% --- Executes on button press in b7.
function b7_Callback(hObject, eventdata, handles)
% hObject    handle to b7 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

n=0:255;
fs=8000;
f1=852;f2=1209;
N=256;
y1=sin(2*pi*f1*n/fs);
y2=sin(2*pi*f2*n/fs);
yn=y1+y2;
sound(yn,fs)
axes(handles.fig1);
plot(n,yn);
set(handles.fig1,'XMinorTick','on');
title('DTMF Input');xlabel('Time');
ylabel('Amplitude');grid;
fft1;

% --- Executes on button press in b8.
function b8_Callback(hObject, eventdata, handles)
% hObject    handle to b8 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

n=0:255;
fs=8000;
f1=852;f2=1336;
N=256;
y1=sin(2*pi*f1*n/fs);
y2=sin(2*pi*f2*n/fs);
yn=y1+y2;
sound(yn,fs)
axes(handles.fig1);
plot(n,yn);
set(handles.fig1,'XMinorTick','on');
title('DTMF Input');xlabel('Time');
ylabel('Amplitude');grid;
fft1;
% --- Executes on button press in C.
function C_Callback(hObject, eventdata, handles)
% hObject    handle to C (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

n=0:255;
fs=8000;
f1=852;f2=1633;
N=256;
y1=sin(2*pi*f1*n/fs);
y2=sin(2*pi*f2*n/fs);
yn=y1+y2;
sound(yn,fs)
axes(handles.fig1);
plot(n,yn);
set(handles.fig1,'XMinorTick','on');
title('DTMF Input');xlabel('Time');
ylabel('Amplitude');grid;
fft1;
% --- Executes on button press in b9.
function b9_Callback(hObject, eventdata, handles)
% hObject    handle to b9 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
n=0:255;
fs=8000;
f1=852;f2=1477;
N=256;
y1=sin(2*pi*f1*n/fs);
y2=sin(2*pi*f2*n/fs);
yn=y1+y2;
sound(yn,fs)
axes(handles.fig1);
plot(n,yn);
set(handles.fig1,'XMinorTick','on');
title('DTMF Input');xlabel('Time');
ylabel('Amplitude');grid;
fft1;

% --- Executes on button press in ba.
function ba_Callback(hObject, eventdata, handles)
% hObject    handle to ba (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

n=0:255;
fs=8000;
f1=941;f2=1209;
N=256;
y1=sin(2*pi*f1*n/fs);
y2=sin(2*pi*f2*n/fs);
yn=y1+y2;
sound(yn,fs)
axes(handles.fig1);
plot(n,yn);
set(handles.fig1,'XMinorTick','on');
title('DTMF Input');xlabel('Time');
ylabel('Amplitude');grid;
fft1;
% --- Executes on button press in b0.
function b0_Callback(hObject, eventdata, handles)
% hObject    handle to b0 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
n=0:255;
fs=8000;
f1=941;f2=1336;
N=256;
y1=sin(2*pi*f1*n/fs);
y2=sin(2*pi*f2*n/fs);
yn=y1+y2;
sound(yn,fs)
axes(handles.fig1);
plot(n,yn);
set(handles.fig1,'XMinorTick','on');
title('DTMF Input');xlabel('Time');
ylabel('Amplitude');grid;
fft1;

% --- Executes on button press in D.
function D_Callback(hObject, eventdata, handles)
% hObject    handle to D (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

n=0:255;
fs=8000;
f1=941;f2=1477;
N=256;
y1=sin(2*pi*f1*n/fs);
y2=sin(2*pi*f2*n/fs);
yn=y1+y2;
sound(yn,fs)
axes(handles.fig1);
plot(n,yn);
set(handles.fig1,'XMinorTick','on');
title('DTMF Input');xlabel('Time');
ylabel('Amplitude');grid;
fft1;
% --- Executes on button press in bn.
function bn_Callback(hObject, eventdata, handles)
% hObject    handle to bn (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)


n=0:255;
fs=8000;
f1=941;f2=1633;
N=256;
y1=sin(2*pi*f1*n/fs);
y2=sin(2*pi*f2*n/fs);
yn=y1+y2;
sound(yn,fs)
axes(handles.fig1);
plot(n,yn);
set(handles.fig1,'XMinorTick','on');
title('DTMF Input');xlabel('Time');
ylabel('Amplitude');grid;
fft1;