[Mp4-tech] Hadamard transform

[Ilan Daniel]

Dear RAVINDER,
As I understand, the Hadamard Transform gives another level of compression efficiency by using the correlation that exist between the 16 DC components.
This correlation exist only at 16x16 Intra prediction.
 in all other cases the prediction can be done separately for each 4x4, 8x8 smaller blocks and that destroy the correlation between the 4x4 blocks.
ilan.
-----Original Message-----
From: mp4-tech-bounces lists.mpegif.org [mailto:mp4-tech-bounces lists.mpegif.org]On Behalf Of soogoor ravinder rao
Sent: Wednesday, October 20, 2023 3:25 PM
To: mp4-tech lists.mpegif.org
Subject: [Mp4-tech] Hadamard transform
HELLO SIR,
      IN INTRAFRAME, IF PRED TYPE IS 16X16, WE WILL PERFORM HADAMARD TRANSFORM ON DC BLOCK. IS THERE ANY REASON BEHIND THIS OPERATION.  
THANKING YOU SIR,
RAVINDER.S
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