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The Computer Journal 2004 47(6):701-707; doi:10.1093/comjnl/47.6.701
© 2004 by British Computer Society
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A Branch-and-Bound Algorithm for the Construction of Reversible Variable Length Codes

Hsien-Wen Tseng* and Chin-Chen Chang§

Department of Computer Science and Information Engineering, National Chung Cheng University, Chaiyi, Taiwan 621, R.O.C.

Reversible variable length codes (RVLCs) have been extensively studied. In recent years, many new coding standards such as H.263 MPEG-4 and JPEG-2000 have adopted RVLCs to enhance their error resilient capability. This paper presents a novel algorithm that can construct efficient RVLCs. Distinct from previous Huffman-based schemes, the proposed algorithm employs the branch-and-bound strategy to generate RVLCs. This strategy not only improvesthe coding efficiency but also provides a flexible codeword selection. The experimental results show that the RVLCs obtained by our algorithm outperform all existing RVLCs.

Received 20 February 2003. Revised 31 May 2004.

* Email: hwtseng{at}cs.ccu.edu.tw

§ Email: ccc{at}cs.ccu.edu.tw


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