25 Years of Audio Coding: How We Arrived at Audio Playback on iPhone and its Underlying Technology
| Details | ||
|---|---|---|
| Talker | Dr. Akihiko (Ken) Sugiyama |  |
| Date | 06.12.2016 | |
| Time | 17:15 h | |
| Place | Aquarium, Building D, Faculty of Engineering, Kaiserstr. 2., 24143 Kiel |
Abstract
This lecture presents the 25-year history of audio coding technology. Focusing on MPEG Audio Coding that is the most widely used international standard in our daily life, some im-portant techniques we contributed are explained along the history. Recent standardization activities are briefly touched to show the unlimited potential of audio coding. An encounter of the Silicon Audio, developed in 1994 and the real ancestor of iPod, is the highlight of this lecture, which cannot be experienced elsewhere. The audience will see how iPod started its function 20 years ago.
Short biography
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, the ancestor of iPod. He served as Chair of Audio and Acoustic Signal Processing Tech. Committee, IEEE Signal Processing Society (SPS) [2011-2012], as associate editors for several jour-nals such as IEEE Trans. SP [1994-1996], as the Secretary and a Member at Large to the Con-ference Board of SPS [2010-2011], as a member of the Awards Board of SPS [2015], and as the Chair of Japan Chapter of SPS [2010-2011]. He was a Technical Program Chair for ICASSP2012. He has contributed to 16 chapters of books and is the inventor of over 150 registered patents with more pending applications in the field of signal processing in Japan and overseas. He received 13 awards such as the 2002 IEICE Best Paper Award, the 2006 IEICE Achievement Award, and the 2013 Ichimura Industry Award. He is Fellow of IEEE and IEICE, and a Distinguished Lecturer in 2014 and 2015 for IEEE SPS. He is also known as a big host for a total of over 70 internship students.
Adaptive Noise Cancellers: Challenges, Solutions, and Successful Applications of a Classical Technique
| Details | ||
|---|---|---|
| Talker | Dr. Akihiko (Ken) Sugiyama |  |
| Date | 06.12.2016 | |
| Time | 15:00 h | |
| Place | Aquarium, Building D, Faculty of Engineering, Kaiserstr. 2., 24143 Kiel |
Abstract
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.
Short biography
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, the ancestor of iPod. He served as Chair of Audio and Acoustic Signal Processing Tech. Committee, IEEE Signal Processing Society (SPS) [2011-2012], as associate editors for several jour-nals such as IEEE Trans. SP [1994-1996], as the Secretary and a Member at Large to the Con-ference Board of SPS [2010-2011], as a member of the Awards Board of SPS [2015], and as the Chair of Japan Chapter of SPS [2010-2011]. He was a Technical Program Chair for ICASSP2012. He has contributed to 16 chapters of books and is the inventor of over 150 registered patents with more pending applications in the field of signal processing in Japan and overseas. He received 13 awards such as the 2002 IEICE Best Paper Award, the 2006 IEICE Achievement Award, and the 2013 Ichimura Industry Award. He is Fellow of IEEE and IEICE, and a Distinguished Lecturer in 2014 and 2015 for IEEE SPS. He is also known as a big host for a total of over 70 internship students.
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In the first week of September, we were delighted to host Dr. Isabel Schiller, an early-career researcher from RWTH Aachen University's Work and Engineering Psychology Lab. Isabel is a Clinical Linguist, holds a PhD in Psychology, and is passionate for auditory cognition and voice research. Together, we've embarked on a collaborative endeavor centered around auditory feedback modulation. Our goal is to develop and assess a real-time voice modification system, designed to explore vocal motor control in both healthy speakers and those with voice disorders. As we joined forces this week, we laid the groundwork for the technical implementation of our project and prepared the upcoming launch of our first experiment at RWTH Aachen University. Interdisciplinary collaborations like this one highlight the importance of merging knowledge from different domains, not only for advancing cutting-edge research but also for fostering an enjoyable and enriching experience.