Title :
Convergence analysis of stereophonic echo canceller with pre-processing-relation between pre-processing and convergence
Author :
Hirano, Akihiro ; Nakayama, Kenji ; Watanabe, Kazunobu
Author_Institution :
Fac. of Eng., Kanazawa Univ., Japan
Abstract :
This paper presents convergence characteristics of stereophonic echo cancellers with pre-processing. The convergence analysis of the averaged tap-weights show that the convergence characteristics depends on the relation between the impulse response in the far-end room and the changes of the pre-processing filters. Examining the uniqueness of the solution in the frequency domain leads us to the same relation. Computer simulation results show the validity of these analyses
Keywords :
Hi-Fi equipment; audio signal processing; convergence of numerical methods; echo suppression; filtering theory; frequency-domain analysis; teleconferencing; averaged tap-weights; computer simulation results; convergence analysis; far-end room; frequency domain analysis; impulse response; pre-processing; pre-processing filters; stereophonic echo canceller; teleconferencing; Adaptive filters; Application software; Convergence; Echo cancellers; Finite impulse response filter; Least squares approximation; Loudspeakers; Microphones; TV; Teleconferencing;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1999. Proceedings., 1999 IEEE International Conference on
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-7803-5041-3
DOI :
10.1109/ICASSP.1999.759807
