| 基于组合码字的矢量量化编码算法 |
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| 引用本文： | 胡云,谢俊元,王崇骏. 基于组合码字的矢量量化编码算法[J]. 南京大学学报(自然科学版), 2011, 0(5) |
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| 作者姓名： | 胡云 谢俊元 王崇骏 |
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| 作者单位： | 南京大学计算机科学与技术系;淮海工学院计算机工程学院; |
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| 基金项目： | 国家自然科学基金(61105069); 江苏省自然科学基金(BK2008190) |
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| 摘 要： | 传统的矢量量化编码方法总是将待编码矢量以码书中唯一的最匹配码字作为其近似输出矢量,以实现数据压缩的目的.这种方法对远离码字的矢量无法避免显著的误差.本文提出组合编码的矢量量化方法,其思想是对远离码字的矢量进行主辅组合编码,对主码字编码造成的误差通过辅码字加以补偿.实验表明,该方法在很小降低压缩比率的条件下显著提高了矢量编码精度,能够在信号处理等领域发挥有效作用.
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| 关 键 词： | 组合编码 矢量量化 误差补偿 |
A combinational encoding algorithm for vector quantization |
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| Hu Yun,,Xie Jun-Yuan,Wang Chong-Jun. A combinational encoding algorithm for vector quantization[J]. Journal of Nanjing University: Nat Sci Ed, 2011, 0(5) |
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| Authors: | Hu Yun Xie Jun-Yuan Wang Chong-Jun |
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| Affiliation: | Hu Yun1,2,Xie Jun-Yuan1,Wang Chong-Jun1 (1.Department of Computer Science and Technology,Nanjing University,Nanjing,210093,China,2.School of Computer Engineering,Huaihai Institute of Technology,Lianyungang,222005,China) |
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| Abstract: | Vector quantization is an important technology in the field of information and coding theory.Traditionally,all the vector quantization algorithms encode a vector by assigning just one optimal matching codeword as its representative to attain the objective of data compressing.However,for vectors lay far away from the code words,this strategy will introduce significant error inevitably because of the Intrinsic shortage of code words in the codebook.In depth encoding experiments using LBG algorithm on standard... |
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| Keywords: | vector quantization combinational encoding adjuvant code word |
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