| 基于新的空胞腔策略的矢量量化码书设计方法 |
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| 引用本文： | 李碧,林土胜,刘清,范策.基于新的空胞腔策略的矢量量化码书设计方法[J].计算机工程与应用,2008,44(28):40-41. |
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| 作者姓名： | 李碧 林土胜 刘清 范策 |
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| 作者单位： | 1. 广东外语外贸大学,信息学院,广州,510420;华南理工大学,电信学院,广州,510641
2. 华南理工大学,电信学院,广州,510641 |
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| 基金项目： | 国家自然科学基金，广东外语外贸大学创新基金 |
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| 摘 要： | 为了克服传统LBG算法中的空胞腔现象,提出了一种基于码字间距最大化的新的空胞腔策略。利用离码书距离最大的输入矢量来修改胞腔中的码字,旨在形成码字的合理分布,减小矢量量化的平均失真。实验结果表明:提出的策略能有效地消除空胞腔现象,获得性能较好的码书,其峰值信噪比比传统的LBG算法提高了3dB。
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| 关 键 词： | 图像压缩 矢量量化 LBG算法 空胞腔 间距最大化 |
| 收稿时间： | 2008-4-7 |
| 修稿时间： | 2008-5-14
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New empty cell strategy based code book design algorithm for vector quantization |
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| LI Bi,LIN Tu-sheng,LIU Qing,FAN Ce.New empty cell strategy based code book design algorithm for vector quantization[J].Computer Engineering and Applications,2008,44(28):40-41. |
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| Authors: | LI Bi LIN Tu-sheng LIU Qing FAN Ce |
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| Affiliation: | 1.School of Informatics，Guangdong University of Foreign Studies，Guangzhou 510420，China 2.School of Electronic and Information Engineering，South China University of Technology，Guangzhou 510641，China |
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| Abstract: | To tackle the empty cell phenomenon in the LBG algorithm,this paper presents a new empty cell strategy which is based on maximization the distance between the code words.The empty cell is filled with the input vector which has the largest distance to the codebook.The goal is to get an even distribution of the code words,alleviating the overall distorting in vector quantization.Experimental results show:the presented strategy can resolve the empty cells problem effectively,outperforming the standard LBG and other competing algorithms.The improvement of peak signal-noise ratio is 3 dB compared with the conventional LBG algorithm. |
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| Keywords: | image compression vector quantization LBG algorithm empty cells maximization the distance |
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