Journal of South China University of Technology (Natural Science Edition) ›› 2008, Vol. 36 ›› Issue (9): 100-106.

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

A Novel Adaptive Rate Control Algorithm for H. 264 Frame Layer

Lan Tian  Gu Xue-mai  Guo Qing  Wang Zhen-yong   

  1. Communication Research Center, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China
  • Received:2008-03-25 Revised:2008-05-09 Online:2008-09-25 Published:2008-09-25
  • Contact: 兰天（1981-），男，博士生，主要从事视频通信、视频压缩和码率控制研究． E-mail:skywards_lan@hotmail．com
  • About author:兰天（1981-），男，博士生，主要从事视频通信、视频压缩和码率控制研究．
  • Supported by:

    国家“863”计划项目（2006AA701116）;国家自然科学基金资助项目（60532030）

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Abstract:

As the existing rate control algorithms for H. 264 frame layer do not consider the relationship between the encoding complexity of video sequence and the available channel bandwidth, a novel rate control algorithm is proposed. In this algorithm, each video sequence is divided into several scenes, and the channel bandwidth sufficiency is introduced to describe the relationship between the encoding complexity of each scene and the available channel bandwidth. Moreover, the target bit and the quantization parameter are adjusted according to the channel bandwidth sufficiency and the relative encoding complexity measurement based on block histogram. Simulated results show that, as compared with JVT-G012, the proposed algorithm can achieve better trade-off among compressed video quality, available channel bandwidth and encoder buffer fullness under different channel bandwidth sufficiencies.

Key words: image compression, H. 264 video coding, rate control, channel bandwidth sufficiency, block histogram difference