[vorbis-dev] video codec

[Holger Waechtler]

On Fri, 9 Feb 2001, Holger Waechtler wrote:

> 
> On Fri, 9 Feb 2001, Gregory Maxwell wrote:
> 
> > On Sat, Feb 10, 2001 at 12:03:34AM +0800, Steve Underwood wrote:
> > [snip]
> > > Your useless data may not be mine. Years of DSP have taught me that I
> > > can predict only 80-90% of the outcome. The other 10-20% can be a
> > > killer! Don't wait too long to find out.
> > [snip]
> > 
> > For example, in my testing with 3d transforms, I found temporal ghosting to
> > be a big problem at sudden scene changes (I suspect because we have so
> > little temporal resolution compaired to spacial resolution and the
> > thresholding doesn't concentrate power in depth-space sufficently to cope
> > with the low resolution these). Perhaps we need to generalize SET
> > to 3d so we can clamp the depth of a transform to non-power of two sizes
> > with frame level granularity, then detect scene changes and chop the
> > transform.

Just to make it really clear -- the current wavelet code doesn't requires
power-of-2 sizes.

- Holger

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