[maybe OT] Macroblock compare functions

[CAFxX]

After a little googling i wasn't able to find any descritpion of the "Macroblock compare functions" used by ffdshow (SAD, SSE, SATD, PSNR and so on). Can someone point me a paper or something?
Thank you in advance, CAFxX.

(BTW, I hope this is the right section for such a question...)

[easyfab]

ok here some infos:

From the fastest to the slowest and from good to best quality

SAD=Sum of Absolute Differences
SSE=Sum of Squared Errors
SATD=Sum of Absolute Hadamard Transformed Differences
RD=Rate Distortion optimal

[CAFxX]

easyfab, thank you for the reply.
has this already been discussed here? and about all the other functions?