[Mp4-tech] Question on enhanced aacPlus stereo parameter estimation

[#SAMSUDIN#]

Hi!
A question related to Parametric Stereo tool as defined in ISO/IEC
14496-3 Amd.2 and 3GPP standard on enhanced aacPlus. 
In the parameter estimation for current frame, in left, right and
cross-channel excitation calculation, why is there a term (-L/2)+1?
           kh     L-1
el(b) = sum  sum | l(k, (-L/2) + 1 + n)^2 | + epsilon
           k=kl  n=0 
Is it related to time synchronization? Please help.
Thanks and Regards,
Sam.  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: /pipermail/mp4-tech/attachments/20041213/a1ca6404/attachment.html