Title :
A stable and distortion-free IIR echo and howling canceler
Author :
Chao, Jinhui ; Tsujii, Shigeo
Author_Institution :
Dept. of Electr. & Electron. Eng., Tokyo Inst. of Technol., Japan
fDate :
8/1/1991 12:00:00 AM
Abstract :
The authors propose a configuration for an infinite impulse response (IIR) adaptive echo and howling canceller, which consists of a two-channel maximum entropy lattice filter and its inverse filter. The echo is canceled by the adaptive lattice filter, while the signal distortion is eliminated by the inverse lattice. With stability guaranteed without the necessity of testing, the structure costs O (N) multiplications per sampling period. The algorithm can also be greatly simplified for white input cases
Keywords :
adaptive filters; digital filters; echo suppression; telephone equipment; IIR filter; adaptive lattice filter; echo canceller; howling canceler; infinite impulse response; inverse filter; inverse lattice; stability; telephony; two-channel maximum entropy lattice filter; Adaptive filters; Costs; Distortion; Entropy; IIR filters; Lattices; Predistortion; Sampling methods; Stability; Testing;
Journal_Title :
Signal Processing, IEEE Transactions on
