[XviD-devel] halfpel and maybe quarterpel interpolation questions

[Marco "elcabesa" Belli]

hi
another time i'm here to disturb you, sorry=)

i have some question, i'm looking at image_interpolation function and i see 
that when it's called for halfpel interpolation, it make new pixels simply 
using a linear interpolation.
i don't know if i'm right.. but using a FIR bigger than the one used for 
linear interpolation won't make it work better?

going back to one dimension formula you are using a fir with these coefficents
0.5   1    0.5 
may be using a bigger fir.. something like  a 9 coefficent FIR insthead of a 3 
coeff FIR it would make a better interpolation, and would guide xvid to a 
better motion estimation? (i don't know if the interpolated image is then 
used for motion estimation)

i don't know nothing about qpel interpolation algorithm.. but maybe it can 
also improve it


if you tell that it could help i could try to test it , for halfpel and report 
what i found

see you