[x264-devel] Re: 1/4 pixel resolution

[Tuukka Toivonen]

On Fri, 12 Aug 2005, leon jorgunsen wrote:

>You can even perform 1/8-pel motion compensation...

But not in H.264. Except possibly for chroma
(not sure how it works, but if you get 1/4 position
for luma, then you need to linearly interpolate 4:2:0 chroma
for 1/8 chroma pixel position).

1/8 luma interpolation was suggested for H.264
during the standardization but rejected before
final version.

I think even 1/3 pixel ME/MC was suggested at some stage.

Laurent's suggestion to emulate 1/8 MC with B-frames
was fabulous. When do we get that into x264? ;)

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