[x264-devel] Regarding claiming for standard approval

[mahesh k]

Can you please tell me where I can find some better quantization algorithms.

Regards,
Mahesh.

On Jan 31, 2008 3:05 PM, Loren Merritt <lorenm at u.washington.edu> wrote:

> On Thu, 31 Jan 2008, mahesh k wrote:
>
> > I do find some difference in the quantization of X264 and our.
>
> http://mailman.videolan.org/pipermail/x264-devel/2007-November/003729.html
>
> > I think they are using function pointers. But my results are matching
> with
> > JM.
>
> Of course your results aren't identical to JM. Every encoder is different.
> What kind of screwed up standard would allow only a single possible
> encoder algorithm? Not even JM is identical to JM; it has tons of options,
> including multiple quantization algorithms.
>
> > please let me know whether X264 is as per H.264 standard or not.
>
> The definition of a compliant encoder is one that generates compliant
> bitstreams. So try this thought experiment: Given a h264 stream (and only
> the compressed stream, assume you don't have access to the original source
> video), can you tell what quantization algorithm was used to generate it?
> No? Then quantization can't have any impact on standards compliance.
>
> --Loren Merritt
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