Inventor · San Jose, CA, US

Wai Chung Chu

38Patents
10h-index
30Co-inventors
75Inventor score

Filing activity: Apr 29, 2002 → Nov 7, 2022

Most-cited inventions

PatentTitleAreaCited byStatus
US9489948B1 Sound source localization using multiple microphone arrays Electricity 388 Active
US8983089B1 Sound source localization using multiple microphone arrays Electricity 59 Active
US9560446B1 Sound source locator with distributed microphone array Electricity 44 Active
US9621984B1 Methods to process direction data of an audio input device using azimuth values Electricity 26 Active
US9818425B1 Parallel output paths for acoustic echo cancellation Physics 21 Active
US8885815B1 Null-forming techniques to improve acoustic echo cancellation Physics 19 Active
US7426470B2 Energy-based nonuniform time-scale modification of audio signals Physics 13 Expired
US9753119B1 Audio and depth based sound source localization Physics 13 Active
US8855295B1 Acoustic echo cancellation using blind source separation Physics 12 Active
US9767828B1 Acoustic echo cancellation using visual cues Electricity 10 Active
US10115411B1 Methods for suppressing residual echo Physics 9 Active
US9319787B1 Estimation of time delay of arrival for microphone arrays Electricity 6 Active
US11217235B1 Autonomously motile device with audio reflection detection Electricity 5 Active
US10867617B1 Techniques for processing audio data Electricity 5 Active
US11107492B1 Omni-directional speech separation Electricity 5 Active
US10966022B1 Sound source localization using multiple microphone arrays Electricity 4 Active
US9390723B1 Efficient dereverberation in networked audio systems Physics 4 Active
US10755727B1 Directional speech separation Electricity 4 Active
US11545172B1 Sound source localization using reflection classification Physics 3 Active
US9351089B1 Audio tap detection Physics 3 Active
US9373338B1 Acoustic echo cancellation processing based on feedback from speech recognizer Physics 3 Active
US9081083B1 Estimation of time delay of arrival Physics 2 Active
US11915698B1 Sound source localization Physics 2 Active
US7231344B2 Method and apparatus for gradient-descent based window optimization for linear prediction analysis Physics 2 Expired
US10242695B1 Acoustic echo cancellation using visual cues Electricity 2 Active

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.