HELP ON MOTION ESTIMATION in VIDEO COMPRESSION

[swahlah]

Hi,
I am working on H.264 Video Encoder. I have tested several Motion Estimators like EPZS and UMHexagonS and lots others but i couldn't find anyone much closer to the full search. Can any one please tell me that which one motion estimator is best for this encoder architecture,
Thanks,

 

[the_penetrator]

do you mean in terms of PSNR quality? Some of them maight be close to full-search but none gets better PSNR its is obvious (i mean for the block-matching algorithms of course).

Try the three-step logarithmic search, it is quite good.

the_penetrator©

 

[swahlah]

Your proposal is totally bogus. I have tested lots of motion estimation algorithms and i know that three step search is a very bad algorithm for next generation encoders and as H.264 is a next generation encoder it requires a more robust algorithms. EPZS and UMHexagon are already outperforming the Other conventional algorithms like Three step search and conjugate direction searches. But i need a more robust and fast adaptive motion estimator.
And of course PSNR~Bitrate is one of the testing metrices.

Thanks but no thanks for your invaluable suggestion,

 

[the_penetrator]

Spiral-searches or diamond searches are close to what you want? What are these algorithms you refer to, block-matching or adaptive block area algos?

Look here pal, if you are not discussing the profile of your applications, and especially the type of input streams (fast-changing or not, high-contrast or not) you won't get much help.

BTW I have designed 2 FSMD architectures for motion estimation, in VHDL, the one of those featuring complex non-cached memory architecture. So I am qualified to discuss this stuff. Also, TSS is not that bad for low motion.

the_penetrator©

 

[swahlah]

Dear PIMR,
This paper seems to be nice. But can u please highlight the different DSP / Hardware implementation issues of this algorithm in context of memory and Data loads and stores and also parallel processing issues,

Sincerely,
SHAFIQUE

 

[east]

can everybody send to me the coding and documentation?

in c programming..

thanks

regards
IS

 

[the_penetrator]

KMA my friend

Hope this helps....

 

[east]

hi

sorry for asking..

do u hav the coding and the documentation?

 

[the_penetrator]

i am aware of a recent nice work on motion estimator designs.

Look here:
**broken link removed**

You will probably find a simulator. I'm not sure about HDL codes, but it is possible.