Method and system for processing subband signals using adaptive filters

• Main Authors: BRENNAN ROBERT L, ABUTALEBI HAMID REZA, SHEIKHZADEH-NADJAR HAMID, SUN DEQUN
• Format: Patent
• Language: Chinese; English
• Published: 26.05.2010
• Subjects: ACOUSTICS; BASIC ELECTRONIC CIRCUITRY; DEAF-AID SETS; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS; MUSICAL INSTRUMENTS; PHYSICS; PUBLIC ADDRESS SYSTEMS; RESONATORS; SPEECH ANALYSIS OR SYNTHESIS; SPEECH OR AUDIO CODING OR DECODING; SPEECH OR VOICE PROCESSING; SPEECH RECOGNITION

A method and system for processing subband signals using adaptive filters is provided. The system is implemented on an oversampled WOLA filterbank. Inputs signals are oversampled. The system includesan adaptive filter for each subband, and the functionality of improving the convergence properties of the adaptive filter. For example, the convergence property is improved by whitening the spectra ofthe oversampled subband signals and/or affine projection algorithm. The system is applicable to echo and/or noise cancellation. Adaptive step size control, adaptation process control using Double-Talk detector may be implemented. The system may further implement a non-adaptive processing for reducing uncorrelated noise and/or cross-talk resistant adaptive noise cancellation.