Stereophonic acoustic echo canceller without pre-processing

• Published in: 2004 IEEE International Conference on Acoustics, Speech and Signal Processing Vol. 4; p. iv
• Main Authors: Hirano, A., Nakayama, K., Someda, D., Tanaka, M.
• Format: Conference Proceeding
• Language: English; Japanese
• Published: Piscataway, N.J IEEE 28.09.2004
• Subjects: Acoustic signal detection; Acoustical engineering; Adaptive filters; Applied sciences; Computer simulation; Detection, estimation, filtering, equalization, prediction; Echo cancellers; Exact sciences and technology; Information, signal and communications theory; Loudspeakers; Microphones; Niobium; Signal and communications theory; Signal, noise; Telecommunications and information theory; Teleconferencing; Adaptive detection; Acoustic noise; Acoustic signal; Computer simulation; Noise reduction; Stereophony; Convergence rate; Echo suppression; Algorithm
• ISBN: 9780780384842; 0780384849
• ISSN: 1520-6149
• DOI: 10.1109/ICASSP.2004.1326784

This paper proposes a stereophonic acoustic echo canceller without pre-processing which can identify the correct echo-paths. By dividing the filter coefficients into two portions and updating one part at a time, the filter coefficient have a unique solution. Convergence analysis clarifies the condition for correct echo-path identification. For fast convergence and stable adaptation, a convergence detection and an adaptive step-size are also introduced. The modification amount of the filter coefficients detects the convergence and also determines the step-size. Computer simulations show 10dB smaller coefficient error than those of the conventional algorithms.