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Dynamic Universal Variable Length Coding with Fixed Re-Association Table  

Choe, Ung-Il (Dept.of Electric Electronics Computer Engineering, Sungkyunkwan University)
Jeon, Byeong-U (Dept.of Electric Electronics Computer Engineering, Sungkyunkwan University)
Yu, Guk-Yeol (Dept.of Electronics Information Engineering, Yeungnam University)
Cheon, Gang-Uk (Samsung Electronics Corporation)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SP / v.39, no.2, 2002 , pp. 56-68 More about this Journal
Abstract
The Universal Variable Length Coding(UVLC) scheme in H.26L has nice features such as error resiliency and two-way decodability. However, it has lower coding efficiency than the conventional Huffman coding. To improve the coding efficiency of UVLC, we Propose to use a dynamic codeword mapping that changes association between symbols and codewords in order to utilize the statistical characteristics of symbols as much as possible but without losing any features of the UVLC. Both encoder and decoder use the same re-association table, and hence the encoder need not send additional overhead for the re-mapping relationship to the decoder. Simulation results show that without significant change of the current H.26L coding scheme, the proposed method additionally attains up to about 8% and about 5% bit reductions respectively in intra and inter frames over the current H.26L encoding method.
Keywords
variable length coding; entropy coding; H. 26L;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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