Question

在录音机MATLAB 2014版功能中，我有与尺寸有关的问题吗？

我无法在2014版中使用waverecorder。我试着寻找答案，但我找不到。

请告诉我应该做出哪些更改，以便它们具有相同的大小

Error using  + 
Matrix dimensions must agree.

Error in FM (line 52)
fm1=cos( W1*t  +   f_dev1*a1 );  %The FM modulation
function fm1


Did you mean:
>> size(a1)

ans =

           1      352800

>> size(t)

ans =

           1     1411200



    % FM MO.mod&DE.mod code 
    fs=352800;
    x = 88200;                     % The sample frequency
    ts=1/fs;                        % time steps size
    t=0:ts:4-ts;                    % The time interval, it starts from zero
    No= length(t);                  % length of the time vector

    x1 = audiorecorder(x, 16, 1); 
    disp('Start speaking.') 
    recordblocking(x1, 4);
    disp('End of Recording.');   


    m1=getaudiodata(x1);              

    %The transpord to avoid mismatch size of vectors
    m1=m1'

    cutoff=4000;
    [a b]=butter(6,2*cutoff*ts);

    y1=filter(a,b,m1)  ;
    fc1=50000    ;         % carrier frequency for fm1&fm3
    f_dev1=(2./max(y1))*pi*8000       ; 

    W1=2*pi*fc1;                

    a1=(cumsum(y1).*ts); %here size of a1 352800


    fm1=cos( W1*t  +   f_dev1*a1 );  % here is the problem size t of 1411200
                                          wilea1 352800

下面的行将与waverecorder一起使用

fs=352800;


x= 88200; %whatever sampling frequency your system supports


m1=wavrecord(4*x,x) % The length of this vector or speech signal will be 4x which will creat a lot of problems at the code.


m1=resample(m1,fs,x); % Now the length of the vector has been converted to No and everything will work.

我可以将其用于audiorecorder吗？

错误向量必须与使用重新采样时的长度相同？

0 个答案: