Framing and windowing audio signal

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gowthami kommineni
gowthami kommineni 2016-2-14
回答： Walter Roberson 2016-2-14
Iam using the code
Y=waveread(' ');
w_length=128;
m=length(Y);
numFrames=floor(m/w_length);
frameData=zeros(numFrames,w_length);
for k=1:numFrames
startAtIdx=(k-1)*w_length+1;
if k~=numFrames
frameData(k,:)=Y(startAtIdx+w_length-1);
else
frameData(k,1:m-startAtIdx+1)=Y(startAtIdx:end);
end
end
I am getting error in else part. The dimensions mismatch. So can any one help. I need to frame an audio signal and allocate memory for it.
Thanks in advance

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回答（1 个）

Walter Roberson
Walter Roberson 2016-2-14
numFrames=floor(m/w_length); is wrong. Suppose your signal length is 160 and your frame length is 128 like you show, then floor(160/128) would be 1, but clearly there should be 2 frames.

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