[Xvid-devel] PSNR, Bitrate of Full Search and other algorithms

[Chien Tran]

Thank you for your advice, I will try to investigate the code more to find
out what is going on with that. I believe that my results are wrong
Regards,

2012/6/16 Jason Garrett-Glaser <jason at x264.com>

> On Fri, Jun 15, 2012 at 7:19 AM, Chien Tran <chien.study at gmail.com> wrote:
> > That's what makes me worry. I only implement the full pel motion
> estimation
> > and disable sub-pel on other algorithms. Not only the PSNR is higher, but
> > the bit rate is also significantly smaller (Ex: 520kbit/s with UMHexagon
> > and 430kbit/s with new algorithm). Actually, I implement this algorithm
> on
> > JM Reference Software, and the PSNR and the ME time are calculated
> > automatically when encoding the video. Therefore I think the PSNR and
> > bitrate are correct.
>
> You didn't even run a regression test to confirm that the bitstream
> was still valid?
>
> You might have also broken something by disabling subpel that you
> didn't intend to.
>
> Odds are very high (99.9%) that your results here are not real; you
> should go to your utmost efforts to show that they aren't, as anyone
> should do with any seemingly impossible results before assuming
> they're valid.
>
> Also, the JM reference is terrible; implement this in a real encoder first.
>
> Jason
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-- 
Best wishes,

Tran Xuan Chien
University of Information Technology
Phone: (+84) 1692 468 154