[Mp4-tech] Re: Query on Scalefactors in MPEG-4 AAC

Ralph Sperschneider sps iis.fhg.de
Wed Nov 5 17:14:15 EST 2003


Raj Narayana Gadde wrote:
> Hi,
>      Can any one tell me the maximum value of scalefactor used in AAC .
> Hoping some answers in this regard.
> Thanks
> Raj
> 
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Dear Faj,
this might help:
hcod_sf[ ]: Shall only be encoded with the values listed in the scalefactor 
Huffman table. Shall be encoded such that the decoded scalefactors sf[g][sfb] 
are within the range of zero to 255, both inclusive.
Best regards,
Ralph
-- 
Dipl.-Ing. Ralph Sperschneider  | Phone: +49 9131 776 344
FhG IIS                         | Fax:   +49 9131 776 398
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