[x264-devel] Re: CABAC performance

[Mathieu Monnier]

 > x264 computes RD costs with the selected entropy coder.

My bad

 > What would be the point of RDO if rate was wrong

Rate(CAVCL) is still strongly correlated to Rate(CABAC), so excepted for 
the lambda which would need to be adjusted, RDO with CABAC cost for 
CAVLC encoding should be almost as efficient, shouldn't it ?

 > http://akuvian.org/src/x264/entropy_mpegcif.png
 > http://akuvian.org/src/x264/entropy_mpegcif_avg.png

Interesting

 > While CAVLC is context-based, it's not really adaptive. So if you try 
to encode content other than what CAVLC was presumably tuned for, CABAC 
gets a bigger lead:
 > http://akuvian.org/src/x264/entropy_anime.png

Very interesting

Regards,

Mathieu

-- 
This is the x264-devel mailing-list
To unsubscribe, go to: http://developers.videolan.org/lists.html