[Mp4-tech] most probable intra mode

[Gary Sullivan]

The standard (when using CAVLC) uses one bit to indicate whether a
particular mode is selected, and if not, then uses 3 bits (for luma
prediction anyhow - something roughly similar for chroma) to indicate
which of the other modes is used.  So often the mode indicated by the
single bit is informally called the "most probable mode" since that is
the intent of the entropy coding design (although the text of the
standard does not use that term).  That is probably the mode you're
looking for.  The relevant section of the standard specifies how to
figure out which mode that is.
Best Regards,
Gary Sullivan
________________________________
	From: mp4-tech-bounces lists.mpegif.org
[mailto:mp4-tech-bounces lists.mpegif.org] On Behalf Of diablo p
	Sent: Thursday, January 27, 2024 3:35 AM
	To: h264codec yahoogroups.com; mp4-tech lists.mpegif.org
	Subject: [Mp4-tech] most probable intra mode 
	hi
	i have read a paper 
	'Efficient Intra-Prediction Algorithm in H.264' written by Bojun
Meng, Oscar C. Au*, Chi-Wah Wong, Hong-Kwai Lam.
	This tells one of the ways to predict the intra mode without
full-search (also with RDO)
	But while implementation, it need the 'most-probable mode'.
	If the cost of this most probable mode is more than the treshold
..we go for kinda full search.
	Does anyone has an idea how to construct this table depending
from the neighbouring macroblocks mode?
	plzz help
	thanx in advance
	bye
	tc
	D.
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