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一种基于G.729语音编码的改进算法 被引量：1

An improved algorithm based on G.729 speech coding
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摘要 共轭代数码本激励线性预测(CS-ACELP)语音编码算法在8 kb/s速率上获得了比较理想的质量,是以10 ms为一短时语音帧作为处理对象.基于CS-ACELP语音编码算法,以20 ms为一语音帧,在编码器中引入脉冲散布技术,提出了一种使码速降低至4 kb/s的散布脉冲代数码本激励线性预测(PD-ACELP)编码算法.经仿真实验及主观听觉测试表明,这种算法的合成语音质量还是比较令人满意的. The quality of the conjugate-structure algebraic-code-excited linear-prediction （CS-ACELP） algorithm is fairly high at the bit-rate of 8 kb/s, which employs a 10 ms -short-time voice-frame as a processing object. On the basis of CS-ACELP algorithm, taking 20 ms-short-time as a voice-frame and using pulse-dispersion technique, a PD-ACELP algorithm is proposed that decreases the bit-rate to 4 kb/s. Both computer simulations and subjective hearing tests show that the synthetic speech quality of the coding algorithm is fairly satisfactory.
作者 巫洪伟 和应民
机构地区 哈尔滨工程大学信息与通信工程学院
出处 《应用科技》 CAS 2007年第4期16-19,共4页 Applied Science and Technology
关键词 语音编码 线性预测 脉冲散布 码本搜索 speech coding linear prediction pulse-dispersion codebook research
分类号 TN912.3 [电子电信—通信与信息系统]
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参考文献6

  • 1SCHROEDER M,ATAL B S.Code-excited linear prediction (CELP) high quality speech at very low bit rates[A].Proceedings of IEEE International Conference on Acoustics,Speech,and Signal Processing[C].Tampa,1985.
  • 2GERSON I A,JASIUK M A.Vector sum excited linear prediction (VSELP) speech coding at 8 kbps[A].Proceedings of IEEE Internat-ional Conference on Acoustics.Speech,and Signal Processing[C].Albuquerque,1990.
  • 3CCITT Recommendation G.728.Coding of Speech at 16 kbit/s Using Low-Delay Code Excited Linear Prediction[S].
  • 4ITU.Recommendation G.729.Coding of Speech at 8 kbit/s Using Conjugate-Structure Algebraic-Code-Excited Linear Prediction (CS-ACELP)[S].
  • 5鲍长春.高质量的4kb/s散布脉冲CELP语音编码算法[J].电子学报,2003,31(2):309-313. 被引量：12
  • 6YASUNAGA K,EHARA H,YOSHIDA K,et al.Dispersedpulse codebook and its application to a 4kb/s speech coder[A].Proceedings of IEEE International Conference on Acoustics,Speech,and Signal Processing[C].Istanbul,2000.

二级参考文献13

  • 1卓力 鲍长春.一种高效、透明的线谱频率参数矢量量化器[J].信号处理,1999,15:154-158.
  • 2ITU-T Recommendation G.729. Coding of Speech at 8 kbit/s Using Conjugate-Structure Algebraic-Code-Excited Linear-Prediction (CS-ACELP) [S].
  • 3ITU-T Recommendation G. 723.1. Dual Rate Speech Coder for Multimedia Communications Transmitting, at 5.3 and 6.3 kbit/s[S].
  • 41 Gerson, M A Jasiuk. Vector sum excited linear prediction (VSELP)speech coding at 8 kb/s[ A]. Proc. IEEE ICASSP[ C]. 1990. 461 -464.
  • 5W Gardner, P Jacobs, C Lee. QCELP: A Variable Rate Speech Coder for CDMA Digital Cellular. Speech and Audio Coding for Wireless Networks ( edited by B. S. Atal, V. Cuperman, and A. Gersho. ) [ M ].Boston, MA: Kluwer, 1993.85 - 92.
  • 6K Mano, T Moriya, S Miki, H Ohmuro, et al. Design of pitch synchronous innovation CELP coder for mobile communications[J]. IEEE Journal on Selected Areas in Communications, 1995,13(1) :31-40.
  • 7Jes Thyssen, Yang Gao, et al. A candidate for the ITU-T 4 kbit/s speech coding standard[A]. Proc. ICASSP .2001.681 - 684.
  • 8K K Paliwal, B S Atal. Efficient vector quantization of LPC parameters at 24 bits/frame[J]. IEEE Transactions on Speech and Audio Processing, 1993,1(1) :3- 14.
  • 9Juin-Hwey Chen, et al. Adaptive postfiltering for quality enhancement of coded speech[J]. IEEE Transactions on Speech and Audio Processing, 1995,3( 1 ) :59 - 71.
  • 10M R Schroeder, B S Atal. Code-excited linear predictive (CELP) : high qaulity speech at very low bit rates [ A ]. Proc. IEEE ICASSP [ C ].1985.937 - 940.

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应用科技
2007年 第4期

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