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Home | Seminars and Symposia | Past seminars/symposia: Monday, December 3, 2018

DTC Seminar Series

Adaptive Noise Cancellers: Challenges, Solutions, and Successful Applications of a Classical Technique


Akihiko Sugiyama
NEC Data Science Research Labs

Monday, December 3, 2018
2:30 p.m. reception
3:00 p.m. lecture

401/402 Walter Library

Akihiko Sugiyama

IEEE Distinguished Lecture Series

This lecture presents A to Z of adaptive noise cancellers (ANCs) which was originally proposed by Widrow et al. in 1975. It has an inherent challenge that is interference by the target signal. Solutions to this problem are explained from a primitive one to the most sophisticated one. A common idea among those solutions is to control a coefficient-adaptation stepsize based on an estimated signal-to-noise ratio (SNR) at the primary input. Other techniques include design of SNR-stepsize conversion function, use of a relative coefficient magnitude normalized by the reference signal power for stepsize control, and conditional cancellation. A carefully designed adaptive stepsize provides robustness to interference by the target signal. Conditional cancellation guarantees that the noise signal power is reduced by noise-replica subtraction. Two applications, namely, robot audition and dual-microphone signal enhancement in mobile phone handsets, are presented with video and sound demonstrations.


Akihiko Sugiyama (a.k.a. Ken Sugiyama), affiliated with NEC Data Science Research Labs., has been engaged in a wide variety of research projects in signal processing such as audio coding and interference/noise control. His team developed the world's first Silicon Audio in 1994, a precursor of iPod. He served as Chair of Audio and Acoustic Signal Processing Technical Committee, IEEE Signal Processing Society (SPS) [2011-2012], as associate editors for several journals such as IEEE Trans. Signal Processing [1994-1996], as the Secretary and a Member at Large to the Conference Board of SPS [2010-2011], as a member of the Awards Board of SPS [2015-2017], as the Chair of Japan Chapter of SPS [2010-2011], and a member of IEEE Fellow Committee. He was a Technical Program Chair for ICASSP2012. He has contributed to 17 chapters of books and is the inventor of over 217 registered patents with more pending applications in the field of signal processing in Japan and overseas. He received 17 awards such as the 2002 IEICE Best Paper Award, the 2006 IEICE Achievement Award, and the 2013 Ichimura Industry Award. He has delivered 107 invited talks in 45 cities of 18 countries. He is Fellow of IEEE and IEICE, and a Distinguished Lecturer for IEEE SPS [2014-2015] and for IEEE CE (Consumer Electronics Society) [2017-2018].