Re: MPEG2's Rate Control
Well not all encoders need to have a rate control mechanism, but still you can develop one for your encoder. MPEG-2's rate control mechanism is actually given in the verification model of the standard, and since MPEG-2 coded bitstream supports I-, P- and B-frames hence the model also discusses abt them. But anyway you can use some other rate control mechanisms also, like H.263's or any other which deals only with I- and P-frame encoding. You can do this because encoder is not standardised.
As far the use of MPEG-2's rate control is concerned, I feel that you can use this also.
Use only I- and P-frames part and skip things dealing with B-frames.
Hope this could be of help
gurpreet