[XviD-devel] SAD vs MSE for ME (warning! acronym overflow!)

[Christoph Lampert]

On 4 Sep 2002, skal wrote:

> 
> 	Hi everybody,
> 
> 	just wanted to know: is there any reason to prefer
> 	SAD as criterion for ME, instead of MSE, e.g.?
> 	I'd tend to think SAD was faster to compute than
> 	MSE with mults, but is there any other reasons?

No, actually MSE/SSE would be the better choice (at least that's what
theory says). MAD/SAD is only chosen because it's faster to compute and
experiment (not mine) showed that it's not much of a difference.

Christoph


P.S. If we used SSE assembler for SSE calcalation, would this be in
file sse_sse.s ? Or should we implement all, make a big file out of it 
and call that   mse_sse_mad_sad-mmx_xxm_sse_3dn_sse.s  ?