Could not determine the size of this expression.
- by Søren
Hi, I have resently started to use MATLAB Simulink, and my problem is that i can't implement an AMDF function, because simulink compiler cannot determine the lengths.
Simulink errors:
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Could not determine the size of this expression.
Function 'Embedded MATLAB Function2' (#38.728.741), line 33, column 32:
"1:flength-k+1"
Errors occurred during parsing of Embedded MATLAB function 'Embedded MATLAB
Function2'(#38)
Embedded MATLAB Interface Error: Errors occurred during parsing of Embedded MATLAB function 'Embedded MATLAB Function2'(#38) .
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MY CODE:
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persistent sLength
persistent fLength
persistent amdf
% Length of the frame
flength = length(frame);
% Pitch period is between 2.5 ms and 19.5 ms for LPC-10 algorithm
% This because this algorithm assumes the frequencyspan is 50 and 400 Hz
pH = ceil((1/min(fspan))*fs);
if(pH flength)
pH = flength;
end;
pL = ceil((1/max(fspan))*fs);
if(pL <= 0 || pL = flength)
pL = 0;
end;
sLength = pH - pL;
% Normalize the frame
frame = frame/max(max(abs(frame)));
% Allocating memory for the calculation of the amdf
%amdf = zeros(1,sLength); %%%%%%%%
amdf = 0;
% Calculating the AMDF with unbiased normalizing
for k = (pL+1):pH
amdf(k-pL) = sum(abs(frame(1:flength-k+1) - frame(k:flength)))/(flength-k+1);
end;
% Output of the AMDF
if(min(amdf) < lvlThr)
voiced = 1;
else
voiced = 0;
end;
% Output of the minimum of the amdf
minAMDF = min(amdf);
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HELP
Kind regards
Søren
