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A Robust and Adaptive Rate Control Algorithm for Real-time Video Communications

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2 Author(s)
Wei Fei ; Coll. of Electr. Eng., Zhejiang Univ., Hangzhou ; Shanan Zhu

This paper proposes a rate control algorithm for real-time video communications. The algorithm exploits feedback buffer control to achieve better buffer stability while improving the accuracy of bit regulation. The novel controller is proposed based on the proportional-integral-derivative (PID) technique, which is widely used in automatic control systems. This PID-based buffer controller can be effectively utilized to maintain a more stable buffer level and adjust the target bits of a frame based on the complexity of the frame and the buffer fullness. An improved R-D model and update scheme are also applied to achieve a more accurate rate regulation and maximize the picture quality. Overall, experimental results indicate that the proposed algorithm in this paper provides a better buffer stability, a more accurate rate regulation and a better picture quality

Published in:

Intelligent Control and Automation, 2006. WCICA 2006. The Sixth World Congress on  (Volume:2 )

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