[XviD-devel] xvid hexagonal search

[Radek Czyz]

Hi Steve,

For p-frames, there is no SAD early termination inside of a search 
pattern, such as a diamond or square. Low SAD just prevents them from 
running at all, and also makes encoder bail out from predictor list if 
SAD is small enough.

For B-frames this is more complex, there are several thresholds based on 
comparison of current mode's SAD vs. best SAD found so far etc.

Could you explain what do you mean in the other two questions :)

Radek

wu steve wrote:
> Hi, there:
>  Not sure is this the place where I should put my idea.
> I am read something about Hexagonal Search and tested the hexagonal search
> provided by X264.
> First, are there anybody who has done the work? Now I am very interested in
> put hexagonal search into Xvid( two basic functions has been done). One is
> simple hexagonal search; another is hexagonal search with inner group
> refine.
> I am trying to put Uneven-cross Multi-Hexagon-grid Search implemented in
> X264 as X264_ME_UMH.
> Here is the question: 1, I have not found out is there any place in Xvid
> using SAD early termination?
> 2, Can anybody tell me where I can find it or I have to do the work?
> 3, I was confused by reading X264_ME_UMH provided by Xvid. They have
> different classes. Where or who I can approach for the references algorithm
> document?
> Still new to Xvid, but getting interested. So please be kind.
> Thanks.
> Steve
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