[Mp4-tech] Re: MP4 file format specifications

[Ralph Sperschneider]

Hans-Juergen Bardenhagen wrote:
> On 29.10.03, 08:27 local time (received 30.10.03, 00:23 GMT+1) Ralph
> Sperschneider wrote:
> 
> 
>>Details can be found in the following output document (issued in
>>Trondheim):
>>
>>5717	Text of ISO/IEC 14496-3:2001/PDAM 3 (MP3onMP4)
>>
>>This PDAM is currently under ballot (being the first of four
>>ballots).
> 
> 
> That's interesting... by the way, are there any plans to include mp3PRO  
> in the MPEG Audio standards as well? This would make sense especially  
> when using it for multichannel encodings, because its higher efficiency  
> wouldn't blow up the size and overall bitrate of multichannel files as  
> much as plain MP3.
> _______________________________________________
> Mp4-tech mailing list
> Mp4-tech lists.mpegif.org
> http://lists.mpegif.org/mailman/listinfo/mp4-tech

Hans-Juergen,
there are currently no plans to standardize SBR for MPEG-1/2 Layer-3. However,
the Audio Subgroup is exploring the possibility of standardizing technology for 
coding multi-channel signals via “spatial audio coding”. Since this technology 
is somewhat orthogonal to the audio coded in use, it might be applied for 
several MPEG audio codecs, e.g. for AAC but also for mp3 (once mp3 can be used 
in the MPEG-4 audio framework). Check out N6023 for details.
Best regards,
Ralph
-- 
Dipl.-Ing. Ralph Sperschneider  | Phone: +49 9131 776 344
FhG IIS                         | Fax:   +49 9131 776 398
Am Wolfsmantel 33               | mailto:sps iis.fhg.de
D 91058 Erlangen                | http://www.iis.fhg.de/amm/