| 一种新的AVS指数哥伦布码算法 |
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| 引用本文： | 文斌,何明华,黄敏琪.一种新的AVS指数哥伦布码算法[J].计算机工程,2011,37(15):218-220. |
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| 作者姓名： | 文斌 何明华 黄敏琪 |
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| 作者单位： | 福州大学电气工程与自动化学院,福州,350108 |
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| 基金项目： | 福建省自然科学基金重点项目，福建省新世纪优秀人才支持计划基金 |
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| 摘 要： | 指数哥伦布码是AVS 视频压缩标准中熵编码的重要组成部分。在研究指数哥伦布码的特点及其编解码算法的基础上，利用哥伦布码码字的二进制大小与编码码值的数学关系，提出一种新的指数哥伦布编解码算法。尤其是在指数哥伦布解码方面，摒弃变长码只能逐位读取、逐位判断计算的思路，采用32 bit读取并用设定公式计算的方法。实验结果表明，该算法比AVS参考代码中的指数哥伦布编、解码方法所用时间分别缩短约10%和30%。
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| 关 键 词： | AVS标准 指数哥伦布码 熵编码 视频编码 |
| 收稿时间： | 2011-01-25 |
AVS Exponential-Golomb Code Algorithm |
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| WEN Bin,HE Ming-hua,HUANG Min-qi.AVS Exponential-Golomb Code Algorithm[J].Computer Engineering,2011,37(15):218-220. |
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| Authors: | WEN Bin HE Ming-hua HUANG Min-qi |
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| Affiliation: | (School of Electrical Engineering & Automation,Fuzhou University,Fuzhou 350108,China) |
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| Abstract: | The exponential-Golomb code is a important part of entropy encoding in AVS video compression standard. This paper investigates the characteristics, encoding and decoding algorithm of exponential-Golomb code, and presents a new algorithm for Exponential-Golomb encoding and decoding according to the mathematic relation between binary value of exponential-Golomb code. Especially in exponential-Golomb decoding, the algorithm discards the idea of reading and judgement bit-by-bit, uses the method of 32 bit reading and given formula. Experimental result shows that the exponential-Golomb code algorithm shortens the encoding time by about 10% than the algorithm applied in AVS reference software, and shortens the decoding time by about 30% than the algorithm applied in AVS reference software. |
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| Keywords: | AVS standard exponential-Golomb code entropy coding video coding |
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