Sagittaire
7th May 2009, 18:22
that's what you get when you trust metrics as a measure of quality.
Anyway OPSNR say clearly that H264>VP7>VC1 and ASP>MPEG2 ...
you get cheated. you cant simply state encoder X is better than Y coz of a higher metric score...
Not with delta at 0.2 db but cleary yes with delta at 2.0 dB
as a matter of fact, as DS said, optimizing for SSIM lowers the PSNR... and probably optimizing for other metrics results in the same situation...
Not by large margin ... and generaly if you are the best with OPNSR it's the case with SSIM and other metric too.
so who's right? obviously your eyes... not some stupid numbers that represents NOTHING.
No ... see the DS blind test. There are incredible difference between each subjectif result. And for overall eyes result say ... exactly like OPSNR.
Anyway OPSNR say clearly that H264>VP7>VC1 and ASP>MPEG2 ...
you get cheated. you cant simply state encoder X is better than Y coz of a higher metric score...
Not with delta at 0.2 db but cleary yes with delta at 2.0 dB
as a matter of fact, as DS said, optimizing for SSIM lowers the PSNR... and probably optimizing for other metrics results in the same situation...
Not by large margin ... and generaly if you are the best with OPNSR it's the case with SSIM and other metric too.
so who's right? obviously your eyes... not some stupid numbers that represents NOTHING.
No ... see the DS blind test. There are incredible difference between each subjectif result. And for overall eyes result say ... exactly like OPSNR.