Dissertation > Excellent graduate degree dissertation topics show

G.729D Speech Codec Implementation on TMS320C64X

Author: LiYuTian
Tutor: YinFuLiang
School: Dalian University of Technology
Course: Communication and Information System
Keywords: G.729D Speech coding Linear Prediction Vector quantization DSP
CLC: TN912.3
Type: Master's thesis
Year: 2005
Downloads: 179
Quote: 1
Read: Download Dissertation

Abstract


Voice compression encoding technique is a very important in multimedia communication techniques, and it can significantly reduce the transmission rate of the speech signal, to improve the utilization of network bandwidth. In 1996, the International Telecommunication Union, Organization for Standardization (ITU-T) launched the codec algorithm based on the conjugate structure - code Excited Linear Prediction (CS-ACELP), and revised recommendations for G.729. The algorithm coding delay 1 5ms, the transmission rate is 8kbit / s, has a lower transmission rate and good quality of synthesized speech, can meet the requirements of multimedia communication. , ITU-T has launched several improved versions, the which G.729D proposal was launched in September 1998 the CS-ACEIP low rate version. Improved compared with G.729, G.729D in the structure of the codebook gain quantization, pitch delay and post-processing, to further reduce the coding complexity, 4 kbit / s transfer rate also dropped, comprehensive performance upgrade, the application prospect. G.729D is expected to replace the G.723. 1 in the framework of the H.324 standard and become a new speech coding standard. In recent years, the rapid development of the digital signal processor so that the digital signal processor as a platform to achieve a high degree of complexity of the speech encoder becomes possible. TI's TMS320C64X DSP instruction set two program and data cache, cross-data path, and eight pipeline structure using advanced very long instruction word, powerful computing capability, and the corresponding development tools with the high efficiency development. This paper describes the the G.729 algorithm the structural and G.729D algorithm improvements part, focusing on analysis of CS-ACELP algorithm LP analysis, the LP coefficient and the conversion of the LSP coefficients, the basic cycle analysis, adaptive codebook and fixed codebook search for complex calculation algorithm, optimized and improved part of the algorithm; brief introduction to the structural features and development tools for digital signal processors, presented the program to achieve G.729D voice codec TMS320C64X DSP platform; comprehensive using a variety of optimization methods to optimize the code. Finally, in the DSP hardware platform achieve codec complexity and codec performance were tested. From the experimental results, improve and optimize the program in memory footprint and computational complexity to achieve the desired objectives, the voice signal by the encoder codec distortion small.

Related Dissertations

  1. Design of Electronicalcontrol System for Electronic Jacquard Knitting Machine,TS183
  2. Research on the Integrated Grating Subdividing Digital Display Device Based on DSP,TH822
  3. Study on Two Dimensional of Auto-Collimator Based on DSP,TH741.14
  4. Study on the Control System for Automatic Aiming of HWIL Pitching Mechanism,TJ303
  5. Research on Synchronous Motor Excitation Control System,TM341
  6. Research on Lapped Transform and Vector Quantization Based Image Coding Algorithm and Applications,TN919.81
  7. Compensation Methods of Different Speech Coding for Speaker Recognition,TN912.34
  8. The AES Algorithm and Its Implementation in DSP,TN918.1
  9. The Design of a DSP-Based Robot Speech Command Recgnition System,TN912.34
  10. Research on Signal Receiving System of Phase Laser Range Finder,TN249
  11. Study on Implementation Technology of Channel Estimation in OFDM System Based on DSP,TN919.3
  12. Optimizing and Realising Research on Vedio Compression in TV Guidance System,TN919.81
  13. Voice Signal De-noise Base on Wavelet and Arithmetic Implement with DSP,TN912.3
  14. Research on Image Compression and Implementation Using TMS320C6713 Based on SPIHT Algorithm,TP391.41
  15. A Study on the Technology of the Infrared Image Matching,TP391.41
  16. Development of 3-Dimensional Scanning Probe Data Acquisition System Based on DSP,TP274.2
  17. Development of Vxibus Common Interface Module Based on DSP,TP274
  18. Research of Acoustic Signal Acquisition System Based on DSP,TP274.2
  19. Research of DSP-based Real-time Demodulation Method of One-frequency Laser Interferometer,TN911.3
  20. Laser alignment system posture measuring device developed,TN24
  21. ATV vehicle weapon control system,TP273

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Electro-acoustic technology and speech signal processing > Speech Signal Processing
© 2012 www.DissertationTopic.Net  Mobile