quantization matrix for inter- picture

Hi folks,
I need to know whether there're any works on quantization matrices
design for residual image (inter- frame like P or B frame in H.26x). It
seems lots of theory on QM design could only apply to JPEG-like intra
frames. Anybody here could recommend any works or people? Thanks in
advance...

Rgds,
Schwarz

schwarz_rings@yahoo.com wrote:
> Hi folks,
> I need to know whether there're any works on quantization matrices
> design for residual image (inter- frame like P or B frame in H.26x). It
> seems lots of theory on QM design could only apply to JPEG-like intra
> frames. Anybody here could recommend any works or people? Thanks in
> advance...

Have a look at the CQM threads on www.doom9.org.
They invent new intra and inter matrices for MPEG4-ASP. Inter is what
you are looking for.
Most people there work empirically but some use profound theoretical
background as well.

bis besser,
Tobias

Hi Tobia,
Thanks for your reply! I went through the discussions in doom9
forum but did not find the CQM thread you mentioned above. It turns out
that some guys just adjusted QM manually, I wonder if you could post
the thread link. what I am interested in is design custom inter QM
based on HVS model. Hope you could help...thanks

REgards,
Schwarz

Schwarz_Rings wrote:
> Thanks for your reply! I went through the discussions in doom9
> forum but did not find the CQM thread you mentioned above. It turns out
> that some guys just adjusted QM manually, I wonder if you could post
> the thread link. what I am interested in is design custom inter QM
> based on HVS model. Hope you could help...thanks

Sharktooth is one of the more advanced people there. He uses HVS models
to generate his matrices. Look here for a thread where he introduces his
set of CQMs:
http://forum.doom9.org/showthread.php?s=&threadid=83125

But the quality judgement for a matrix has to be subjective! Those
models only help in generating good candidates.
"In our eyes we trust"

bis besser,
Tobias