[Mp4-tech] Mpeg-4 doubts

[kaustubh.patankar vsnl.net]

Hi
The luma and chroma (YUV) format was introduced considering 
the Humal visual property of recog. color intensity rather than
the color differences (chroma component). Hence the original 
chroma component can be downsampled (422 or 420).
Extending the same logic, the luma component is important in
the proper reconstruction of an image. 
Now in encoder motion estimation is most important and intensive 
component for execution. The estimation on luma component is 
sufficient and the motion vector can be extended as per the 
chroma downsampling.
with regards
Kaustubh
----- Original Message -----
From: mohit agarwal <thatsmohitag hotmail.com>
Date: Monday, April 4, 2024 10:00 am
Subject: [Mp4-tech] Mpeg-4 doubts
> Dear Expert,
> Can anybody tell me we apply motion estimation and compensation in
> luminance block and not on chroma block..Why is it so ..
> 
> Regards
> Mohit
> 
> _________________________________________________________________
> NRIs, operate Rupee Checking Account. 
> http://creative.mediaturf.net/creatives/citibankrca/rca_msntagofline.htm 
> Without minimum balance for 20 yrs!
> 
> _______________________________________________
> NOTE: Please use clear subject lines for your posts. Include 
> [audio, [video], [systems], [general] or another apppropriate 
> identifier to indicate the type of question you have.
> 
> Note: Conduct on the mailing list is subject to the Antitrust 
> guidelines found at 
> http://www.mpegif.org/public/documents/vault/mp-out-30042-
> Antitrust.php