[Mp4-tech] Re: AAC Conformance accuracy

Ralph Sperschneider ralph.sperschneider iis.fraunhofer.de
Wed Jul 21 03:33:33 EDT 2004


Alfred wrote:
> Thank you for the same.
> Information regarding the the coupling channel isn't
> clear in the standards.
So?
> My understanding is that CCE maybe present even for
> stereo data.
This depends on the AOT and on the number of main audio channels permitted in a
certain profile and level.
> The data stored in CCE improves the
> fidelity of the signal in SCE/CPE whichever it is
> coupled to.
This clearly depends on the CCE content.
> It is mainly useful in cases where the
> dynamic range of the encoded signal is higher.
I cannot retrace this conclusion.
> Also, refer to some material that gives a detail
> description about bufer_fullness in ADTS and ADIF
> formats.
ISO/IEC13818-7:2003
Best regards,
Ralph
-- 
Dipl.-Ing. Ralph Sperschneider  | Phone: +49 9131 776 344
Fraunhofer IIS                  | Fax:   +49 9131 776 398
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