一種設(shè)計(jì)語言信號(hào)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碼本的特征變量,對(duì)碼本的分布特性進(jìn)行了研究,提出了合理構(gòu)造初始碼本、快速訓(xùn)練碼本和快速量化矢量的設(shè)計(jì)波形矢量量化器新算法。計(jì)算機(jī)模擬結(jié)果表明,新算法明顯縮減了碼本訓(xùn)練時(shí)間、提高了矢量量化的速度。
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關(guān)鍵詞:
- 波形矢量量化器; 特征變量; 碼本重構(gòu)
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]黃勝華,貝達(dá)昌.中國科學(xué)技術(shù)大學(xué)學(xué)報(bào),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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