一种设计语言信号波形矢量量化器的新算法
A NEW DESIGN ALGORITHM FOR WAVEFORM VECTOR QUANTIZER OF SPEECH SIGNAL
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摘要: 本文提出了波形矢量量化器码本的特征变量,对码本的分布特性进行了研究,提出了合理构造初始码本、快速训练码本和快速量化矢量的设计波形矢量量化器新算法。计算机模拟结果表明,新算法明显缩减了码本训练时间、提高了矢量量化的速度。
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关键词:
- 波形矢量量化器; 特征变量; 码本重构
Abstract: Characteristic varibles of waveform vector quantizer of speech signal are presented and used to analyze codebook and its training sequence. It includes three parts, i. e., constructing initial codebook efficiently, training codebook fast and quantizing input vectors fast. Computer simulations show that the training speed of codebook is quickened by the new design algorithm and the complexity of vector quantizer is reduced. -
Nakhol J, et al. Proc[J].of IEEE.1985, 73(12):1551-1685[2]Chen D Y, et al. Proc. of ICASSP84, California, USA: 1984, 9.11.1-9.11.4.[3]黄胜华,贝达昌.中国科学技术大学学报,1990,20(2): 171-176.[4]Linde Y, et al. IEEE Trans. on COM, 1980, COM-28(1): 55-66.[5]Gray R M. IEEE ASSP Magzine, 1984,1(1):4-29. -
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