[XviD-devel] some bframes ideas

[Christoph Lampert]

On Fri, 21 Mar 2003, Marco Al wrote:

> From: "Christoph Lampert" <chl at math.uni-bonn.de>
> 
> > > A different idea - which I haven't tried yet - is to substract a
> > > fraction of a quantization error form coefficients (up to half of
> > > maximum error). @ MfA: thanks for this, sounds very reasonble.
> >
> > Could you test this? I'm not so sure about this one...
> 
> The idea is that assuming a laplacian distribution for coefficients
> then for optimal reconstruction after mid-tread quantization you
> simply have to subtract a constant (depending on lambda, the free
> parameter of the laplacian) from the center of the quantization range
> during dequantization. 

Sorry, I may be a mathematician, but this is too fast for me. 
Do you want to modify dequantization? Or do you want to simulate this by 
already subtracting during encoding phase?

gruel