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		Chunwen LI,Peng ZHU.[en_title][J].Control Theory and Technology,2006,4(2):111~113.[Copy]

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ChunwenLI,PengZHU
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Received:April 21, 2005Revised:September 19, 2005

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Optimal source rate control for adapting VBR video over CBR channels

Chunwen LI, Peng ZHU

(Department of Automation, Tsinghua University, Beijing 100084, China;.Key Laboratory of Informationed Electric Apparatus, Zhengzhou Henan 450002, China)

Abstract:

In this paper we discuss the source rate control problem of adapting variable bit-rate (VBR) compressed video over constant bit-rate (CBR) channels. Firstly we formulate it as an optimal control problem of a discrete linear system with state and control constraints. Then we apply the discrete maximum principle to get the optimal solution. Experimental results are given in the end. Compared with traditional algorithms, the proposed algorithm is suitable for the coder with continuous output rates, and can achieve the better solution. Our algorithm can be used in both off-line and on-line coding.

Key words: Optimal control Rate control VBR video CBR channel