| 多矢量多模式量化中码本尺寸联合优化算法 |
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| 引用本文： | 徐敬德,李晔,崔慧娟,唐昆.多矢量多模式量化中码本尺寸联合优化算法[J].清华大学学报(自然科学版),2009(10). |
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| 作者姓名： | 徐敬德 李晔 崔慧娟 唐昆 |
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| 作者单位： | 清华大学电子工程系微波与数字通信技术国家重点实验室; |
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| 基金项目： | 国家自然科学基金资助项目(60272020) |
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| 摘 要： | 为了在基于模式的矢量量化中得到更好的量化效果,提出了一种有效的各模式码本尺寸分配算法以逼近全局最优。该算法对于各个模式分别计算每一种码本尺寸所带来的量化失真,在所有模式码本尺寸之和受限的条件下,寻找所有量化失真之和最小的码本尺寸分配方案。结果表明:该算法在运算量和存储量基本不变的情况下,可以有效地降低量化失真,提高量化精度,合成语音平均意见得分(MOS)提高0.02左右。
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| 关 键 词： | 语音信号处理 矢量量化 码本尺寸分配 |
Joint optimization algorithm of codebook size in multi-parameter,multi-mode quantization |
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| XU Jingde,LI Ye,CUI Huijuan,TANG Kun.Joint optimization algorithm of codebook size in multi-parameter,multi-mode quantization[J].Journal of Tsinghua University(Science and Technology),2009(10). |
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| Authors: | XU Jingde LI Ye CUI Huijuan TANG Kun |
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| Institution: | State Key Laboratory of Microwave and Digital Communication;Department of Electronic Engineering;Tsinghua University;Beijing 100084;China |
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| Abstract: | An efficient algorithm was developed to optimize codebook sizes to improve vector quantization based on different modes.This algorithm first selects several codebook sizes for each mode and then calculates the quantization distortion of each codebook size to find a codebook size allocation with the least quantization distortion for a given sum of all the codebook.Tests show that the method effectively reduces the quantization distortion in the case of invariable operation and storage and increases the mean ... |
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| Keywords: | speech signal processing vector quantization codebook size allocation |
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