[M4IF Technotes] H.264 bitstream

[cloverleafland mail.hongkong.com]

Dear all,
I would like to ask in h.264, how would I know which Conformance Point(i.e which version of the draft standard) a particular version of JM refer to? 
I am currently looking at the bitstream, I find that the method of coding LEVEL in CAVLC is different. Would any one advise me on it?
Thanks in advance.
Regards,
Carmen
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