[XviD-devel] Quantization
Marco Al
marco at simplex.nl
Sun Jul 20 17:21:00 CEST 2003
From: "Edouard Gomez" <ed.gomez at free.fr>
> At least the LUT idea seems to be good for h263 (the LUT would be
> something like 2*32*2048*2=256kB
Didnt you say the fixed point multiply by reciprocal approximation was
always correct for DC scaling? If that is true it should almost certainly
also be true for h263 quantization in general, though maybe not for MPEG-4
where the dividers are larger. Why use a bigger LUT to avoid one extra
multiplication?
Marco
More information about the XviD-devel
mailing list