[FFmpeg-devel] [RFC] AAC encoder optimizations

Gabriel Bouvigne bouvigne
Sun Sep 14 16:21:14 CEST 2008

Loren Merritt a ?crit :

> I understand that michael wants RD before heuristics, but what exactly are 
> you doing that makes this 1000x slower than faac, libvorbis, lame, and 
> 3000x slower than ffac3?
> Is this the first RDOed lossy audio codec anyone has ever written? 

When using RD, other encoders are mainly testing RD over scalefactors 
values, not over individual spectral coefficient. (exemple for mp3: 576 
spectral lines, but only 22 scalefactor bands)


Gabriel Bouvigne
personal page: http://gabriel.mp3-tech.org

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