[x264-devel] Re: [x264-devel]denoise in dct domain can improve visual quality?

[Guy Bonneau]

This is probably the original reference that was used for the
Implementation:

Quantization offsets for video coding
Wedi, T.; Wittmann, S.
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Volume , Issue , 23-26 May 2005 Page(s): 324 - 327 Vol. 1

The document JVT-K026.doc from JVT FTP site is also useful.

> -----Original Message-----
> From: x264-devel-bounce at videolan.org [mailto:x264-devel-
> bounce at videolan.org] On Behalf Of Guy Bonneau
> Sent: Friday, April 27, 2007 9:14 AM
> To: x264-devel at videolan.org
> Subject: [x264-devel] Re: [x264-devel]denoise in dct domain can improve
> visual quality?
> 
> 
> >
> > >   I try to turn on the denoise option and find that psnr is almost the
> > > same.  I think maybe it can't improve psnr but viual quality?
> >
> > Then you're not using it right. It should reduce psnr by a lot. psnr is
> > computed between the filtered output and the non-filtered input, and any
> > difference counts as psnr loss no matter whether the difference is an
> > improvement or an artifact.
> 
> I had a look at the denoise_dct function  and would like to learn more
> about the algorithm used. I saw that the code was borrowed from libavcodec
> Anyone can pinpoint for me the original publication that describes the
> algorithm ?
> 
> Thanks
> Guy Bonneau
> 
> 
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