大连理工大学数字信号处理实验二——电话拨号音的合成与识别

大连理工大学实验报告学院（系）：电信专业：电子信息工程班级：电子1204 姓名：梁宇学号：201281001 组：___ 实验时间：实验室：实验台：指导教师签字：成绩：实验二、电话拨号音的合成与识别一、实验题目和代码实现对电话通信系统中拨号音合成与识别的仿真实现。

系统界面设计：源程序：function varargout = sy2(varargin)% SY2 MATLAB code for sy2.fig% SY2, by itself, creates a new SY2 or raises the existing% singleton*.%% H = SY2 returns the handle to a new SY2 or the handle to% the existing singleton*.%% SY2('CALLBACK',hObject,eventData,handles,...) calls the local% function named CALLBACK in SY2.M with the given input arguments. %% SY2('Property','Value',...) creates a new SY2 or raises the% existing singleton*. Starting from the left, property value pairs are% applied to the GUI before sy2_OpeningFcn gets called. An% unrecognized property name or invalid value makes property application% stop. All inputs are passed to sy2_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 sy2% Last Modified by GUIDE v2.5 03-Jun-2015 23:06:41% Begin initialization code - DO NOT EDITgui_Singleton = 1;gui_State = struct('gui_Name', mfilename, ...'gui_Singleton', gui_Singleton, ...'gui_OpeningFcn', @sy2_OpeningFcn, ...'gui_OutputFcn', @sy2_OutputFcn, ...'gui_LayoutFcn', [] , ...'gui_Callback', []);if nargin && ischar(varargin{1})gui_State.gui_Callback = str2func(varargin{1});endif nargout[varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});elsegui_mainfcn(gui_State, varargin{:});end% End initialization code - DO NOT EDIT% --- Executes just before sy2 is made visible.function sy2_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 sy2 (see VARARGIN)% Choose default command line output for sy2handles.output = hObject;handles.fs=8192;handles.DTMFsum=820;handles.DTMFnum=410;handles.NUM=[];handles.numshow2=[];% Update handles structureguidata(hObject, handles);% UIWAIT makes sy2 wait for user response (see UIRESUME)% uiwait(handles.figure1);% --- Outputs from this function are returned to the command line. function varargout = sy2_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 structurevarargout{1} = handles.output;% --- Executes on button press in num1.function num1_Callback(hObject, eventdata, handles)% hObject handle to num1 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)n1=strcat(get(handles.numshow,'string'),'1') %»ñÈ¡Êý×ÖºÅÂëset(handles.numshow,'string',n1); %ÏÔʾºÅÂën=[1:handles.DTMFnum];d1=sin(2*pi*697/handles.fs*n)+sin(2*pi*1209/handles.fs*n);%¶ÔÓ¦ÐÐÁÐƵÂÊspace=zeros(1,handles.DTMFnum);%410¸ö0Ä£Äâ¾²ÒôÐźÅtemp=[d1,space];handles.NUM=[handles.NUM,temp];%´æ´¢Á¬ÐøµÄ²¦ºÅÒôÐźÅguidata(hObject,handles);audioplayer(d1,8192);% --- Executes on button press in num2.function num2_Callback(hObject, eventdata, handles)% hObject handle to num2 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)n2=strcat(get(handles.numshow,'string'),'2') %»ñÈ¡Êý×ÖºÅÂëset(handles.numshow,'string',n2); %ÏÔʾºÅÂën=[1:handles.DTMFnum];d2=sin(2*pi*697/handles.fs*n)+sin(2*pi*1336/handles.fs*n);%¶ÔÓ¦ÐÐÁÐƵÂÊspace=zeros(1,handles.DTMFnum);%410¸ö0Ä£Äâ¾²ÒôÐźÅtemp=[d2,space];handles.NUM=[handles.NUM,temp];%´æ´¢Á¬ÐøµÄ²¦ºÅÒôÐźÅguidata(hObject,handles);audioplayer(d2,8192);% --- Executes on button press in num3.function num3_Callback(hObject, eventdata, handles)% hObject handle to num3 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)n3=strcat(get(handles.numshow,'string'),'3') %»ñÈ¡Êý×ÖºÅÂëset(handles.numshow,'string',n3); %ÏÔʾºÅÂën=[1:handles.DTMFnum];d3=sin(2*pi*697/handles.fs*n)+sin(2*pi*1477/handles.fs*n);%¶ÔÓ¦ÐÐÁÐƵÂÊspace=zeros(1,handles.DTMFnum);%410¸ö0Ä£Äâ¾²ÒôÐźÅtemp=[d3,space];handles.NUM=[handles.NUM,temp];%´æ´¢Á¬ÐøµÄ²¦ºÅÒôÐźÅguidata(hObject,handles);audioplayer(d3,8192);% --- Executes on button press in num4.function num4_Callback(hObject, eventdata, handles)% hObject handle to num4 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)n4=strcat(get(handles.numshow,'string'),'4') %»ñÈ¡Êý×ÖºÅÂëset(handles.numshow,'string',n4); %ÏÔʾºÅÂën=[1:handles.DTMFnum];d4=sin(2*pi*770/handles.fs*n)+sin(2*pi*1209/handles.fs*n);%¶ÔÓ¦ÐÐÁÐƵÂÊspace=zeros(1,handles.DTMFnum);%410¸ö0Ä£Äâ¾²ÒôÐźÅtemp=[d4,space];handles.NUM=[handles.NUM,temp];%´æ´¢Á¬ÐøµÄ²¦ºÅÒôÐźÅguidata(hObject,handles);audioplayer(d4,8192);% --- Executes on button press in num5.function num5_Callback(hObject, eventdata, handles)% hObject handle to num5 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)n5=strcat(get(handles.numshow,'string'),'5') %»ñÈ¡Êý×ÖºÅÂëset(handles.numshow,'string',n5); %ÏÔʾºÅÂën=[1:handles.DTMFnum];d5=sin(2*pi*770/handles.fs*n)+sin(2*pi*1336/handles.fs*n);%¶ÔÓ¦ÐÐÁÐƵÂÊspace=zeros(1,handles.DTMFnum);%410¸ö0Ä£Äâ¾²ÒôÐźÅtemp=[d5,space];handles.NUM=[handles.NUM,temp];%´æ´¢Á¬ÐøµÄ²¦ºÅÒôÐźÅguidata(hObject,handles);audioplayer(d5,8192);% --- Executes on button press in num6.function num6_Callback(hObject, eventdata, handles)% hObject handle to num6 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)n6=strcat(get(handles.numshow,'string'),'6') %»ñÈ¡Êý×ÖºÅÂëset(handles.numshow,'string',n6); %ÏÔʾºÅÂën=[1:handles.DTMFnum];d6=sin(2*pi*770/handles.fs*n)+sin(2*pi*1477/handles.fs*n);%¶ÔÓ¦ÐÐÁÐƵÂÊspace=zeros(1,handles.DTMFnum);%410¸ö0Ä£Äâ¾²ÒôÐźÅtemp=[d6,space];handles.NUM=[handles.NUM,temp];%´æ´¢Á¬ÐøµÄ²¦ºÅÒôÐźÅguidata(hObject,handles);audioplayer(d6,8192);% --- Executes on button press in num7.function num7_Callback(hObject, eventdata, handles)% hObject handle to num7 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)n7=strcat(get(handles.numshow,'string'),'7') %»ñÈ¡Êý×ÖºÅÂëset(handles.numshow,'string',n7); %ÏÔʾºÅÂën=[1:handles.DTMFnum];d7=sin(2*pi*852/handles.fs*n)+sin(2*pi*1209/handles.fs*n);%¶ÔÓ¦ÐÐÁÐƵÂÊspace=zeros(1,handles.DTMFnum);%410¸ö0Ä£Äâ¾²ÒôÐźÅtemp=[d7,space];handles.NUM=[handles.NUM,temp];%´æ´¢Á¬ÐøµÄ²¦ºÅÒôÐźÅguidata(hObject,handles);audioplayer(d7,8192);% --- Executes on button press in num8.function num8_Callback(hObject, eventdata, handles)% hObject handle to num8 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)n8=strcat(get(handles.numshow,'string'),'8') %»ñÈ¡Êý×ÖºÅÂëset(handles.numshow,'string',n8); %ÏÔʾºÅÂën=[1:handles.DTMFnum];d8=sin(2*pi*852/handles.fs*n)+sin(2*pi*1336/handles.fs*n);%¶ÔÓ¦ÐÐÁÐƵÂÊspace=zeros(1,handles.DTMFnum);%410¸ö0Ä£Äâ¾²ÒôÐźÅtemp=[d8,space];handles.NUM=[handles.NUM,temp];%´æ´¢Á¬ÐøµÄ²¦ºÅÒôÐźÅguidata(hObject,handles);audioplayer(d8,8192);% --- Executes on button press in num9.function num9_Callback(hObject, eventdata, handles)% hObject handle to num9 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)n9=strcat(get(handles.numshow,'string'),'9') %»ñÈ¡Êý×ÖºÅÂëset(handles.numshow,'string',n9); %ÏÔʾºÅÂën=[1:handles.DTMFnum];d9=sin(2*pi*852/handles.fs*n)+sin(2*pi*1477/handles.fs*n);%¶ÔÓ¦ÐÐÁÐƵÂÊspace=zeros(1,handles.DTMFnum);%410¸ö0Ä£Äâ¾²ÒôÐźÅtemp=[d9,space];handles.NUM=[handles.NUM,temp];%´æ´¢Á¬ÐøµÄ²¦ºÅÒôÐźÅguidata(hObject,handles);audioplayer(d9,8192);% --- Executes on button press in num10.function num10_Callback(hObject, eventdata, handles)% hObject handle to num10 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)n=[1:1000];num=get(handles.numshow,'string');l=length(num);n10=strrep(num,num,num(1:l-1));d10=sin(0.7217*n)+sin(0.9273*n);set(handles.numshow,'string',n10);L=length(handles.NUM);handles.NUM=handles.NUM(1:L-820);guidata(hObject, handles);audioplayer(d10,8192);% --- Executes on button press in num0.function num0_Callback(hObject, eventdata, handles)% hObject handle to num0 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)n0=strcat(get(handles.numshow,'string'),'0') %»ñÈ¡Êý×ÖºÅÂëset(handles.numshow,'string',n0); %ÏÔʾºÅÂën=[1:handles.DTMFnum];d0=sin(2*pi*941/handles.fs*n)+sin(2*pi*1336/handles.fs*n);%¶ÔÓ¦ÐÐÁÐƵÂÊspace=zeros(1,handles.DTMFnum);%410¸ö0Ä£Äâ¾²ÒôÐźÅtemp=[d0,space];handles.NUM=[handles.NUM,temp];%´æ´¢Á¬ÐøµÄ²¦ºÅÒôÐźÅguidata(hObject,handles);audioplayer(d0,8192);% --- Executes on button press in num11.function num11_Callback(hObject, eventdata, handles)% hObject handle to num11 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)set(handles.numshow,'string',[get(handles.numshow,'string'),'#']); fs=8192;fL=941;fH=1477;wL=2*pi*fL/fs;wH=2*pi*fH/fs;n=1:410;d12=sin(wL*n)+sin(wH*n);sound=[d12,zeros(1,410)];audioplayer(sound,fs)pause(.5);if ~isempty(handles.NUM)audioplayer(handles.NUM,fs);all_numdata=handles.NUM;n=length(handles.NUM)/820;rowf_mat=zeros(1,n);colf_mat=zeros(1,n);identify_result='';for i=1:nd=all_numdata((i-1)*820+1:i*820);f=fft(d,fs);a=abs(f);p=a.*a/fs;[value,rowf_mat(i)]=max(p(1:1000));[value,colf_mat(i)]=max(p(1000:1700));colf_mat(i)=colf_mat(i)+1000;endfor i=1:nrowf=rowf_mat(i);colf=colf_mat(i);if rowf<730;row=1;elseif rowf<810row=2;elseif rowf<900row=3;elserow=4;endif colf<1272.5;col=1;elseif colf<1406.5col=2;elsecol=3;endif row==4&&col==2row=1;col=0;endidentify_result=strcat(identify_result,num2str(3*(row-1)+col));endset(handles.numshow2,'string',identify_result);end实验结果：1.拨号2.删除二、总结、讨论和建议本次实验开始时用的wavplay函数实现拨号音，但是在电脑上运行时因为MA TLAB版本较高，wavplay函数已删除，改为了audioplayer函数实现，但是audioplayer函数需要参数定义，查阅了很多资料也没有学到，以至于运行程序的时候，总是在“#”回显是因为audioplayer的缘故不能实现回显，没有完成语音信号的识别。