[XviD-devel] Re: qpel smearing/noise problem

Michael Niedermayer xvid-devel@xvid.org
Thu, 9 Jan 2003 16:41:45 +0100


Hi

On Thursday 09 January 2003 16:13, Christoph Lampert wrote:
> On Thu, 9 Jan 2003, Michael Niedermayer wrote:
> > Hi
> >
> > On Thursday 09 January 2003 13:56, James Hauxwell wrote:
> > > In qpel mode you can have 8x8 and 16x16 blocks
> > >
> > > The process is
> > > 8tap filter horizontal
> > > Bilinear filter horizontal
> > > 8tap filter vertical
> > > Bilinear filter vertical
> >
> > damn, i forgot that, ffmpeg does what the standart says, not what the
> > reference software does, so thats very likely the problem, only question
> > is which is correct?
>
> The reference software is correct (well, in fact the standard has been
> modified to be in compliance with the software. That's a clever way
> of debugging: leave the software as it is, instead modify the specs. )
ok, i believe u both, ill fix ffmpeg

btw, ISO sucks, 
1. because the standarts are not freely available
2. because they change them at random
3. these ugly patents ....
4. they are bloated with strange features which noone will ever use

i hope tarkin will be finished soon, allthough i havnt seen much activity on 
their mailinglist ...

[...]

Michael