[XviD-devel] VHQ

[Christoph Lampert]

On Thu, 13 Feb 2003, Radek Czyz wrote:
> I think I like the way it is now - if cbp = 0, we count on SAD. If
> not, we count bits.

hm, but where is there difference between minimizing vector bits with 
fixed dct-bits between cbp!=0 and cbp==0 ?

In the second case, there is no chance to lower number of dct-bits, okay,
but still if we have several possibilites with same number of DCT-bits, 
vector bits don't give a clue which to choose, and minimizing them would
be bad. 
I guess your method works, because due to the nature of video signal, 
it's less likely that DCT bits stay constants and vector bits done, unless
everything is 0 from the beginning already, but still I have the
impression that a method 

* "Optimize DCT bits under the condition of total bits not getting larger
  than what ME had found", 

instead of 

* "optimize total number of bits" 

would be worth looking at. 

I'll check a few samples how "# of bits" evolves during this search
and see if it would make difference. 

gruel