[Mp4-tech] [video] Intra Prediction

[Gary Sullivan]

But the DC mode uses some degree of prediction too.  I don't think there
is a way to turn off prediction completely when using H.264/AVC, except
to code every macroblock in a separate slice or do something similar to
that by FMO use.
I think the same is true for MPEG-2.  The DC coefficient must be
predicted.
I believe H.263 (without use of Annex I) and H.261 don't use intra MB
prediction.
But why would you not want to use prediction?
-Gary Sullivan
________________________________
	From: mp4-tech-bounces lists.mpegif.org
[mailto:mp4-tech-bounces lists.mpegif.org] On Behalf Of stefano battista
	Sent: Monday, September 13, 2023 12:01 PM
	To: Ilan Daniel; mp4-tech lists.mpegif.org
	Subject: Re: [Mp4-tech] [video] Intra Prediction
	hi Ilan--
	of course the encoder can choose to always use the "average"
prediciton mode every time it encodes an Intra Macroblock, provided it
signals that using the correct H264 syntax...
	it will be less efficient than a better encoding strategy :)
	--Stefano
	--Stefano Battista
	bSoft -- www.bsoft.info
	tel/fax +39-0733-261845
	mobile +39-335-7213624
		----- Original Message ----- 
		From: Ilan Daniel <mailto:Ilan.Daniel adimos.com>  
		To: mp4-tech lists.mpegif.org 
		Sent: Monday, September 13, 2023 2:39 PM
		Subject: [Mp4-tech] [video] Intra Prediction
		Hi,
		I understand that the encoder has several  Intra
Prediction modes to choose from,
		can the encoder decide not to predict at all ? (using
constant 128 level prediction, like in edges MBs).
		thanks,
		Ilan Daniel
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