[theora] NHW Image codec - improvement of precision

Raphael Canut nhwcodec at gmail.com
Thu May 16 09:20:22 PDT 2013


Just a quick message to let you know that I have improved the compression
scheme of UV DC part, of 200octet in average... And so I use this space to
better select the wavelet coefficients in the higher bands (for Y
comp).This new version has then a little more precision.

Many thanks,

2013/4/8 Raphael Canut <nhwcodec at gmail.com>

> Hello,
> Just a quick message, I have improved precision on U and V components, and
> so this version is better if it may be of interest.Yes, for now the NHW
> codec is just an experimental test tool, that would be optimized for visual
> evaluation (more neatness-sharpness) rather than PSNR.
> If you could find time to test it, would be really interested in any
> feedback (about for example the overall approach, results,...).
> Many thanks again,
> Raphael
> 2013/3/25 Raphael Canut <nhwcodec at gmail.com>
>> Hello,
>> Just a very quick message, for those interested, I improved a
>> little precision of my codec.This version also has a better compression,
>> especially for some images.This version seems a little better.Any comment
>> is welcome.
>> Many thanks,
>> Raphael
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.xiph.org/pipermail/theora/attachments/20130516/93e2aae9/attachment.htm 

More information about the theora mailing list