[M4IF Technotes] Re: 14496-3:2001 Corrigendum 2002

[Ralph Sperschneider]

menno wrote:
> Hello,
>
> Can anyone clarify why the "emphasis" field has been removed from the ADTS
> specification in 14496-3? This makes it impossible to decode older ADTS files
> that comply with the standard before Corrigendum 2002.
>
> (and I'm not looking for this answer: "Because then it is the same as in
> 13818-7 (MPEG-2 AAC)")

Dear Menno,
the emphasis field found it´s way into the MPEG-4 ADTS specification by failure. 
Most likely, it was removed from the MPEG-2 AAC specification after MPEG-4 was 
branched (about 1996/97), and the MPEG-4 editors missed to remove it as well. 
This has now been fixed by the mentioned corrigendum.
Best regards,
Ralph
-- 
Dipl.-Ing. Ralph Sperschneider  | Phone: +49 9131 776 344
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