19 April 2000 Modified symmetrical reversible variable length code and its theoretical bounds
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Abstract
The reversible variable length codes (RVLCs) have been adopted in the emerging video coding standards -- H.263+ and MPEG- 4, to enhance their error-resilience capability which is important and essential in the error-prone environments. The most appealing advantage of symmetrical RVLCs compared with asymmetrical RVLCs is that only one code table is required to forward and backward decoding, however, two code tables are required for asymmetrical RVLCs. In this paper, we propose a simple and efficient algorithm that can produce a symmetrical RVLC from a given Huffman code, and we also discuss theoretical bounds of the proposed symmetrical RVLCs.
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Chien-Wu Tsai, Ja-Ling Wu, Shu-Wei Liu, "Modified symmetrical reversible variable length code and its theoretical bounds", Proc. SPIE 3974, Image and Video Communications and Processing 2000, (19 April 2000); doi: 10.1117/12.382995; https://doi.org/10.1117/12.382995
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