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

[JK(Jeong Kwon) Kim]

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