自适应霍夫曼码的动态映射技术

Liang-Wei Lee, Liang-Ying Liu, Jhing-Fa Wang, Jau-Yien Lee
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引用次数: 2

摘要

提出了一种硬件成本低、压缩效率高的自适应霍夫曼码。该码的自适应原则是在保持所有码字不变的情况下,动态改变符号与码字之间的映射关系。将该编码应用于MPEG的“宏块类型”编码,实验结果表明,该编码比MPEG多节省20%/spl / sim/28%的编码位。与传统的自适应VLC相比,新代码的硬件成本和操作明显减少。因此,它适用于实时编码系统,特别是视频编解码器。>
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dynamic mapping technique for adaptive Huffman code
A new adaptive Huffman code which has low hardware cost and high compression efficiency is proposed. The adaptation principle of this code is to dynamically change the mapping relationship between symbols and codewords while keeping all codewords unchanged. The proposed code is applied to the coding of "macroblock types" of MPEG and the experimental results show that it can achieve a 20%/spl sim/28% more savings of coded bits than MPEG. The hardware cost and operations of the proposed hardware architecture for the new code are significantly less when compared to conventional adaptive VLC. Hence, it is suitable for real-time coding systems, especially the video codec.<>
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