[M4IF Technotes] B-frame in simple profile

Liang Cheng lcheng62 yahoo.com
Mon Nov 11 21:37:45 EST 2002


Hi,
Can anyone of you tell me why there is no B-frame in
mpeg4 simple profile?  How long is the mp4 suggested
maximum refresh period.  H.263 takes about 132 frames
before the next I-frame.
Thanks,
Liang
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