[Mp4-tech] a problem about rate control

[zhweizh]

Hi,
all experts,
   MPEG-4 Q2 rate-control algorithm does with only the subsequent P-frame in Momusys VM18. When I apply the algorithm for IBBPBBPBBP....., it finds the bufer easily overflow or downflow while P-frames and B-frames all apply MB rate-control algorithm.     I want to know why  Q2 rate-control algorithm is available for the IPPPPPPP... coding type, but unavailable for the IBBPBBPBBP... coding type?  
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡zhweizh
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡zhweizh mailst.xjtu.edu.cn
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡2003-08-15