[Mp4-tech] Difference between H.263 and MP4 short header mode

[Gary Sullivan]

JK Kim et al,
The syntax is the same.  The syntax element that is called "zero_bit" in
MPEG-4 part 2 is called "CPM" in H.263.
Best Regards,
Gary Sullivan
+> -----Original Message-----
+> From: mp4-tech-bounces lists.mpegif.org 
+> [mailto:mp4-tech-bounces lists.mpegif.org] On Behalf Of 
+> JK(Jeong Kwon) Kim
+> Sent: Friday, September 02, 2023 12:02 AM
+> To: mp4-tech lists.mpegif.org
+> Subject: [Mp4-tech] Difference between H.263 and MP4 short 
+> header mode
+> 
+> Dear experts,
+> I have a question about the syntax of Picture layer of H.263.
+> 
+> At the end of the Picture layer header (i.e. before GBSC),
+> there are syntaxes like following:
+> =============================================================
+> =========
+> zero_bit
+> do{
+>    pei
+>    if (pei == "1")
+>       psupp
+> } while (pei == "1")
+> =============================================================
+> =========
+> 
+> In H.263 baseline,                   there is no "zero_bit".
+> In MPEG4 SHM (short header mode), there is "zero_bit".
+> 
+> Are not H.263 baseline and MPEG4 SHM compatible with each other?
+> Please let me know your opinions!
+> Thanks in advance.
+> 
+> 		JK Kim
+> 
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