Journal of South China University of Technology (Natural Science Edition) ›› 2008, Vol. 36 ›› Issue (8): 11-17.

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

Novel Rate Control Algorithm of Real-Time Code-Stream Truncation and Its VLSI Architecture

Wu Zong-ze  Xie Sheng-li   

  1. School of Electronic and Information Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2007-07-04 Revised:2007-10-06 Online:2008-08-25 Published:2008-08-25
  • Contact: 吴宗泽（1975-），男，讲师，主要从事图像视频编码、图像处理研究． E-mail:zzwu@scut．edu．cn
  • About author:吴宗泽（1975-），男，讲师，主要从事图像视频编码、图像处理研究．
  • Supported by:

    广东省政府-国家自然科学基金委联合资助项目（U0635001）

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Abstract:

In order to implement the real-time code-stream truncation during the Tierl coding in JPEG2000, the rest rate-distortion information of an image tile is combined with the rate-distortion slope of the current coding pass to determine the truncation of the current coding pass, thus effectively guaranteeing the real-time coding and decoding of the JPEG2000 system. Moreover, the JPEG2000 VLSI architecture is built up based on the algorithm proposed in this paper, which can truncate the code stream real-time during the Tierl coding. Experimental results show that the proposed algorithm helps to truncate the code stream during the coding with high real-time performance, less working memory and excellent reconstructed image quality.

Key words: code-rate control, coding pass, rate-distortion slope, truncation, very large scale integration