[Mp4-tech] h264 : MaxBR and MaxCBP

[Satendra]

Hi all,
what are the exact meaning of MaxBR and MaxCBP and how these two parameters
are inter-related.
I am having some understanding, but still there are few questions.
Here's my understanding:
MaxCBP is the max buffer size needed for input encoded stream.
and MaxBR is the maximum bitrate for the stream.
My question is how MaxBR in Kbps is governing the encoded stream.
Over what duration does stream has to be bounded by this MaxBR.
1) averaged over full encoded stream, or
2) averaged over GOP, or
3) averaged over a second, or
4) averaged over a frame
Also, is it a Max bound or Average bound?
Suppose, If it is a average bitrate over a GOP, then dividing this among
frames, intra frames will have higher bitrate to maintain same quality.
Or, if it is a frame level bound, then to preserve same quality among all
frames, we will never use the full range, as Intra frames will determine the
max bitrate.
I will be thankful, if someone can explain these parameters.
Best Regards
Satendra
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"We all agree on the necessity of compromise. We just can't agree on when
it's necessary to compromise."  ------Larry Wall
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