Title :
Research on shiftability of wavelet packet subbands decomposition for echo cancellation
Author :
Yongde, Wang ; Zhu Yanna
Author_Institution :
Dept. of Radio Electron., Sichuan Univ., Chengdu, China
Abstract :
Adaptive echo cancellation using the wavelet packet subband decomposition can reduce the computation burden significantly, but suffers from the problem of non-shiftability. An approach to adjust the original wavelet function intended to solve this problem is proposed. The relationship between perfect reconstruction (PR) and shiftability is also discussed
Keywords :
adaptive signal processing; echo suppression; signal reconstruction; wavelet transforms; adaptive echo cancellation; perfect reconstruction; shiftability; subband decomposition; wavelet packet subbands; Adaptive filters; Background noise; Discrete wavelet transforms; Echo cancellers; Electrostatic discharge; Fourier transforms; Microphones; Reconstruction algorithms; Speech enhancement; Wavelet packets;
Conference_Titel :
Signal Processing Proceedings, 1998. ICSP '98. 1998 Fourth International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-4325-5
DOI :
10.1109/ICOSP.1998.770210
