[Ffmpeg-devel] Dubious field in AAC-ADTS

Måns Rullgård mru
Fri Jun 10 18:19:03 CEST 2005

"Nico Sabbi" <nsabbi at fastwebnet.it> writes:

> Hi,
> I don't fully understand what's the meaning of the field 
> "no_raw_data_blocks_in_frame" described here:
> http://www.audiocoding.com/modules/wiki/?page=ADTS
> Is it the number of audio frames carried in the current 
> ADTS packet or what else? If not, can I always assume that
> an ADTS packets always carries exactly 1 AAC frame?

That field specifies the number of raw_data_block elements that
follow.  Each raw_data_block decodes into 1024 or 960 samples for each
channel.  See ISO 14496-3, section 4.5.2.  Does this answer your

M?ns Rullg?rd
mru at inprovide.com

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