[Mp4-tech] Enhanced HE-AAC baseline version

[Andreas Schneider]

Hello Anup,
mp4-tech-bounces lists.mpegif.org wrote on 25/10/2023 12:30:31 PM:
> Hi all
> I have a doubt about baseline version of enhanced HE-AAC ( enhanced 
> aac Plus). What is the maximum number of envelopes allowed in the 
> baseline version. MPEG spec says it is 4 in the case of full 
> version, and the 3GPP spec says that for the baseline version the 
> maximum number of envelopes allowed is 1,but the MPEG standard does 
> not mention anything about this in the explanation of the baseline 
version
Could you please point out to which part of the 3GPP specification you are 
referring?
There is no difference in the number of envelopes between baseline and 
unrestricted parametric stereo. For both versions the maximum number of 
envelopes is 4. Any statement to the opposite is wrong and should be 
fixed.
Best regards,
Andreas Schneider
> Could anyone of you please clarify
> With Regards
> -Anup
> 
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Andreas Schneider, Research Engineer
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