[x264-devel] Re: Regarding quarter pixel ME

[mahesh k]

Ok, thx for ur reply.....Can u plz tell me whether the quarter pixel ME will
give the min SAD for all the macroblocks within a frame.? Also plz tell me
where I can find the test results regarding this?

regards,
mahesh

On 3/28/07, Radek Czyz <radoslaw at syskin.cjb.net> wrote:
>
> > 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
> >
> >     --
> >     This is the x264-devel mailing-list
> >     To unsubscribe, go to: http://developers.videolan.org/lists.html
> >
> >
>
> --
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