[opus] ODG (Objective Difference Grade) scores for Opus Encoder using PQEvalAudio Tool

[Rhishikesh Agashe]

Hi,

I checked the ODG (Objective Difference Grade) scores for a few reference vectors using the PQEvalAudio Tool and found that some of them show ODG scores as high as -3.5

If we look at the range as described in the link below, it looks unacceptable.
http://www-mmsp.ece.mcgill.ca/documents/Software/Packages/AFsp/PQevalAudio.html

Am I missing something or are these scores valid?

Thanks and Regards,
Rhishi

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.xiph.org/pipermail/opus/attachments/20131004/7e809a4e/attachment.htm