30 May 2000 Local statistics adaptive entropy coding method for the improvement of H.26L VLC coding
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Proceedings Volume 4067, Visual Communications and Image Processing 2000; (2000) https://doi.org/10.1117/12.386674
Event: Visual Communications and Image Processing 2000, 2000, Perth, Australia
Abstract
In this paper, we propose an adaptive entropy coding method to improve the VLC coding efficiency of H.26L TML-1 codec. First of all, we will show that the VLC coding presented in TML-1 does not satisfy the sibling property of entropy coding. Then, we will modify the coding method into the local statistics adaptive one to satisfy the property. The proposed method based on the local symbol statistics dynamically changes the mapping relationship between symbol and bit pattern in the VLC table according to sibling property. Note that the codewords in the VLC table of TML-1 codec is not changed. Since this changed mapping relationship also derived in the decoder side by using the decoded symbols, the proposed VLC coding method does not require any overhead information. The simulation results show that the proposed method gives about 30% and 37% reduction in average bit rate for MB type and CBP information, respectively.
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Kook-yeol Yoo, Jong Dae Kim, Byung-Sun Choi, Yung Lyul Lee, "Local statistics adaptive entropy coding method for the improvement of H.26L VLC coding", Proc. SPIE 4067, Visual Communications and Image Processing 2000, (30 May 2000); doi: 10.1117/12.386674; https://doi.org/10.1117/12.386674
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