Spatial Hearing vs. Signal Processing
James D. Johnston (Former Chief Scientist DTS, Inc)
APPLIED SIGNAL PROCESSING SERIESDATE: 2012-09-13
TIME: 10:00:00 - 11:00:00
LOCATION: RSISE Seminar Room, ground floor, building 115, cnr. North and Daley Roads, ANU
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ABSTRACT:
In the production and broadcast worlds, we see a lot of various kinds of signal processing, both linear and nonlinear. While the discussion of loudness and broadcast is important, this talk will be about the spatial hearing cues that the auditory system can actually detect, and how signal processing can be used to affect spatial sensation. The talk will briefly detail the auditory system, referring to 100+ years of research by many people at a high level. Along with this, various signal processing methods will be mentioned that do or do not create various of the sensations. Along the way, the difficulties with headphone auralization and envelopment will be covered at a high level. There will be quite a few obvious places where more research is called for.
BIO:
James D. Johnston (F) received his BSEE and MSEE from Carnegie-Mellon University.
Dr. Johnston joined DTS Inc., from his position at Neural Audio. Prior to that, he worked for 5 years at Microsoft Corporation in the "Codecs", "Core Media Processing" and finally the video services groups as Audio Architect.
Dr. Johnston retired from AT&T Labs - Research, quartered at Florham Park, NJ, Speech Processing Software and Technology Research Department. Before that, he was employed by AT&T Bell Laboratories, in the Acoustics Research Department under Dr. J. L. Flanagan, and in the Signal Processing Research Department.
Dr. Johnston was the primary researcher and inventor of the MPEG-2 AAC audio coding algorithm, and a principle contributor to the "MP3" algorithm. He also represented AT&T in the ANSI accredited group X3L3.1, and X3L3.1 in the ISO-MPEG-AUDIO (MP3, AAC) arena. Dr. Johnston was awarded the IEEE James L. Flanagan Signal Processing Field Award (2006); elected Fellow, Audio Engineering Society (1997); received AT&T Technology Medal and AT&T Standards Award (1998); received a New Jersey Inventor of the Year Award (2001); elected IEEE Fellow (2002).
Dr. Johnstonas current research interests include acoustic scene modelling, loudspeaker design, loudspeaker pattern control, cochlear modelling, masking threshold models, stereo imaging models and stereo imaging sensitivity models, methods of reproducing soundfields either literally or perceptually, microphone and soundfield capture techniques, both actively steered and time-invariant, and speech and audio coding methods in general.
