Re: Analogue artifact estimation

On Sunday, Sep 1, 2002, at 09:54, [email protected] wrote:

> I think that the problem with all codecs to date is that they are
> designed to compress perfect material originating directly from a
> camera.  In my opinion, the above *analogue* artifacts are what give
> the digital codecs a hard time.

Yes, one generally does better with high quality source, if only 
because the most common analogue artifact is noise.

Note that vqeg.org has a collection of test sequences that have all 
been degraded in particular ways. They were developed to test video 
quality measurement proceedures and so (tangentially) address precisely 
this issue. You might look at that in terms of testing particular 
codecs.

BTW, we've also mirrored the unmodified sequences at media.xiph.org. At 
the moment we only have space for that subset.

Cheers,
  -r

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