Dissertation > Excellent graduate degree dissertation topics show

Intelligent voice -based systems and related functions for acoustic echo cancellation algorithm

Author: EZhiFeng
Tutor: YangLuMing
School: Central South University
Course: Computer technology
Keywords: Echo cancellation Duplex environment Correlation function Split ratio SAR system
CLC: TN912.3
Type: Master's thesis
Year: 2010
Downloads: 101
Quote: 0
Read: Download Dissertation

Abstract


With the development of the information age, communication quality signal processing has become a hot topic in the field of one of the most important. For a long time, the echo issue has been affecting communication quality is a major problem. Echo can be classified according to their origin and acoustic echo echo circuit, in which the realization of acoustic echo cancellation is particularly difficult. This paper studies the acoustic echo cancellation algorithm. Has been widely applied to the main use of the echo canceller least mean square (LMS) algorithm is represented by the traditional adaptive filtering algorithms. Such conventional adaptive filtering algorithm biggest drawback is only applicable to single-station environment and can not apply to the current prevalence of duplex environments. In recent years, the emergence of the correlation function based adaptive filtering algorithm is designed specifically for duplex environment adaptive filtering algorithms. Such algorithms can be the information received from the microphone will separate the echo signal, thus effectively solve the conventional echo algorithm duplex environment failure. However, based on the correlation function of the existing adaptive filtering algorithm generally not efficient, low convergence speed, only at the theoretical stage, difficult to practical application. Based on the characteristics of the existing voice communications based on correlation function was improved adaptive filtering algorithm is proposed split ratio Hartley transform extended correlation least mean square (SPHECLMS) algorithms. Simulation results show that the new algorithm efficiency of the algorithm and convergence speed has improved dramatically, and more suitable for practical applications. Smart Sound (SAR) system is a novel acoustic control system with the impulse response of the sound control. Based on this correlation function by introducing an adaptive filtering algorithm proposed can achieve echo cancellation correlation function based SAR system model. This model differs from all current through the circuit method to eliminate acoustic echo echo canceller, which can be manufactured at the microphone echo zero, is a direct way through the acoustic echo canceller acoustic echo cancellation system. Finally, the SPHECLMS algorithm and related functions combined SAR system is proposed based on SAR systems and SPHECLMS acoustic echo canceller, which is a way of using the acoustic echo cancellation of the new echo canceller, simulation experiments show that the echo canceller has a good performance.

Related Dissertations

  1. Voice quality optimization wireless terminal design,TN912.3
  2. On-chip bias spatial correlation non-parametric estimation method,TN405
  3. Simulation of Fully Thermally Coupled Distillation Column and Its Energy Efficiency,TQ028.31
  4. Research on the Space-time Correlation Characteristics of Vector Noise Field in Boundary Conditions,TB52
  5. Research on the Paired Carrier Multiple Access Technique in Satellite Communication Systems,TN927.23
  6. Research of Adjustment Theory Based on Extended Correlation Least Mean Square Algorithm,TN713
  7. Non-intrusive Load Monitoring Based on Transient Characteristics,TM714
  8. Based on DSP acoustic echo cancellation system,TN911.7
  9. Realization and Optimization of Speech Enhancement Based on DM6446,TN912.35
  10. Development Studies for the Adaptive Filtering Algorithms Based on the Correlation Function,TN713
  11. Study on Soil Slope Reliability Based on Random Field Theory,TU43
  12. Are Emerging Financial Markets Efficient? Some Evidence from the Models of the Ghanaian Stock Exchange,F224
  13. Research on Extension Classification Knowledge Mining Based on Interval Manner,TP311.13
  14. ARM and Linux- based all-digital video intercom system design and implementation,TP391.41
  15. Wavelet Blind Equalization Algorithm Based Different Error Function and Simulation on DSP,TN911.5
  16. The Study of Adaptive Echo Cancellation Method in Communication Systems,TN914
  17. Research on Adaptive Echo Cancellation Based on Microphone Arrays,TN912.3
  18. Constructions and Analysis Some Low Correlation and High Linear Complexity Sequences,TN918.1
  19. Based on the relevant characteristics of stationary random signal filtering method,TN911.7
  20. ARM-based embedded VoIP terminal design and hardware implementation,TN916

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