[x264-devel] Explanation request for ME

[Teemu Tuominen]

Hi,

I just quikly looked at the ME implementation in x264. It's quite 
understandable code, i would say. However, it would be very nice if 
someone could explain if there is some tricks beneath or above the 
search pattern code. If we leave subpel search out of the question, can 
fullsearch be comparable with other implementations. I am considering to 
use x264 in small ME testing environment and i would be pleased for any 
support.

Here are some questions that i firstly wondered...
SAD-functions seemed not to use early break feature. Does x264 use some 
pixel desimation method for SAD.  In which phase is the interpolation 
done for subpel search. Is there any upper-level predictors for motion 
field that leaves BMA entirely out for certain blocks. In other words, 
how precisely can x264 cover the error surface if FS comparison is 
implemented. Is the implemented ESA comparable with fullsearch at 
fulpel-level ? And so on..



-TT-

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