| 6.3kbit/s CELP语音编码的研究 |
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| 引用本文： | 韩向阳,周月臣. 6.3kbit/s CELP语音编码的研究[J]. 南京邮电大学学报(自然科学版), 2000, 20(1): 30-33 |
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| 作者姓名： | 韩向阳 周月臣 |
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| 作者单位： | 南京邮电学院通信工程系,江苏南京 210003 |
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| 摘 要： | 提出了一种新的6.3kbit/sCELP语音编码方案,其语音质量接近ITU-TG.729的合成语音质量,而编解码复杂度约为10MIPS.它在CELP的3个主要方面作了改进LSP参数的矢量量化;开环基音预测,长时预测滤波器系数的求解和量化一体化;代数码本激励.这些措施在保证合成语音质量的前提下大大降低了计算量,从而能够在单片TMS320C30系统上实时实现.
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| 关 键 词： | 码激励线性预测 线谱对 矢量量化 代数码本 |
| 文章编号： | 1000-1972(2000)01-0030-04 |
| 修稿时间： | 1999-04-13 |
A study on 6.3 kbit/s CELP Speech Coder |
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| HAN Xiang yang,ZHOU Yue chen. A study on 6.3 kbit/s CELP Speech Coder[J]. JJournal of Nanjing University of Posts and Telecommunications, 2000, 20(1): 30-33 |
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| Authors: | HAN Xiang yang ZHOU Yue chen |
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| Affiliation: | HAN Xiang yang,ZHOU Yue chen Department of Communication Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China |
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| Abstract: | This paper presents a novel 6.3 kbit/s CELP speech coder.Its speech quality approaches that of ITU T G.729 while its coding complexity is only 10 MIPS.The improvements of CELP include the vector quantization(VQ) of LSP parameters,open loop pitch prediction with combination of LTP(long term prediction)coefficients solution and quantization,and algebraic codebook excitation.All these improvements can reduce computation overhead greatly while keeping speech quality so that this scheme can be realtime realized on mono chip TMS320C30 system. |
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| Keywords: | Code excited linear prediction Linear spectrum pairs Vector ouantization Algebraic codebook |
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