[x264-devel] Re: Regarding quarter pixel ME

[Radek Czyz]

 > U plz tell me whether this was correct or not.

Well yeah, it's a good (although wasteful in terms of memory) way of 
doing it.

You ask for "correct" but ME is never defined, so all methods are 
"correct". Just some are more efficient (give better or faster result) 
than others.

mahesh k wrote:
> I went through the JM reference code but I was not able to understand 
> it. Recently i implemented quarter pixel motion estimation. First I 
> interpolated the whole reference frame upto quarter pixel level and 
> stored this in a buffer. Then  I found the integer pixel motion vector 
> using the previos frame as reference frame (non interpolated reference 
> frame) and the search criterion i used was SAD. Then I performed the sub 
> pixel refinement using the best integer pixel motion vector coordinates 
> as center using the quarterly interpolated frame as reference.
> 
> U plz tell me whether this was correct or not.
> 
> Regards,
> Mahesh.
> 
> On 3/28/07, *Tomas Carnecky* <tom at dbservice.com 
> <mailto:tom at dbservice.com>> wrote:
> 
>     mahesh k wrote:
>      > I didnot get u exactly..Can u tell me in detail...
>      >
> 
>     RTFM means 'Read The Fucking Manual', see[1]. He replaced the 'M' with a
>     'S' which he afterwards explained to be, quote, 'sourcecode or
>     standard'. That means, he was trying to tell you 'Read The F***
>     sourcecode' or Read The F*** standard'.
>     IOW (you can use wikipedia, too,  to look up what that means), he told
>     you to read the sourcecode (which is freely available) or the H.264
>     standard. The information you're looking for is in both locations,
>     hence, quote, 'your choice'.
> 
>      >
>      > On 3/27/07, *Loren Merritt* <lorenm at u.washington.edu
>     <mailto:lorenm at u.washington.edu>
>      > <mailto: lorenm at u.washington.edu
>     <mailto:lorenm at u.washington.edu>>> wrote:
>      >
>      >     On Tue, 27 Mar 2007, mahesh k wrote:
>      >
>      >     > Can any one plz tell me how to choose the refernece frame for
>      >     > integer level and quarter pixel motion estimation.
>      >
>      >     RTFS. (sourcecode or standard, your choice)
>      >
> 
>     tom
> 
>     [1] http://en.wikipedia.org/wiki/RTFM
> 
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> 

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