RE: Misc Codec Questions....

Hi.

>> Oh, and i guess i should mention that my codec is intended
>> for usage in video games for their movie playback so my target is
>decent
>> compression at a low run-time decoding cost.
>
>For the gameboy advance? Or are you trying to avoid royaltee issues?

In essence it's for a XBox/GameCube game. The free solutions on that
platform aren't so good at the moment and the only viable 3rd party solution
is Bink but the codec costs 6500$ per-title/per-platform. I'v always had
some interests in Audio/Video compression so i'v decided to try and write my
own on my spare time.

Now, i'v got decent processor power considering the platforms the codec will
be running on, however since the codec isn't only for cut-scene style video
and it used within the user interface, it has to be reasonable about CPU
usage.

As for royalty issues... I'm not exactly sure what you're talking about...

>> Third and final question for now... Anybody have reference of good
>wavelet
>> motion compensation? I'v found a few ones so far but not much. I
>somehow
>> beleive that doing the motion in the wavelet domain would yield much
>better
>> results than in the image space.
>
>Shrug, motion boundaries are abrubt ... thats not to say it cant be a
>nice solution, just clearly not optimal IMO.

Not that i necessarily want to use mo-comp, however anything along the lines
of 3D Wavelets is generally too expensive memory wise because you need a GOP
big enough to take advanage of it.

What i was considering is some simple multi-resolution mocomp in wavelet
space. Then i'd take the remaining bits in my budget to encode the residuals
from the motion compensation. But i'm not sure how well this would work so
that's essentially why i'm looking for some research material.


>s for references ... see the section on Motion Compensated Subband and
>Wavelet Coding at
>http://dikkiedik.student.utwente.nl/~marco/tarkin/papers/

Thanks!! :D

Sebastien St-Laurent
[email protected]


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