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

Christoph Lampert xvid-devel@xvid.org
Thu, 9 Jan 2003 16:13:01 +0100 (CET)


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. ) 

gruel