"California Coding: Early LPC Speech in Santa Barbara, Marina del Rey, and Silicon Valley and its Accidental Impact on the Internet Protocol"

Robert M. Gray, Electrical Engineering, Stanford University

April 27th (Friday), 3:00pm
Engineering Science Building (ESB), Rm 2001

This talk sketches the historical and technical threads of the early development in California and elsewhere of what is now known as linear predictive coding (LPC) of speech. The focus is on the 1970s, but the story begins in 1967 and the narrative covers through 1982. Personalities, institutions, and milestones are considered along with technical developments and interpretations. The focal event is the first real time communication of understandable digital speech on a packet network, the ARPAnet, in 1974 — arguably the first Voice over Internet Protocol (VoIP), except that the IP did not yet exist. Most histories of digital speech emphasize the contributions of Bell Labs, for half a century the Valhalla of science, engineering, and technology. In fact, the early development of real-time signal processing on the Internet was accomplished by a small group of less famous institutions, including SCRL, UCSB, and CHI in Santa Barbara, USC ISI in Marina del Rey, and SRI (formerly Stanford Research Institute) in Menlo Park.

About Robert M. Gray:

photo of robert m. gray Robert M. Gray is the Alcatel-Lucent Technologies Professor of Communications and Networking in the School of Engineering, Emeritus, and Professor of Electrical Engineering, Emeritus, at Stanford University. He is a Fellow of the IEEE and the Institute for Mathematical Statistics and he was a 1981--82 Fellow of the John Simon Guggenheim Foundation. His professional awards include an Education Award, Meritorious Service Award, Technical Achievement Award, and Society award from the IEEE Signal Processing Society, a Golden Jubilee Award for Technological Innovation and the Claude E. Shannon Award from the IEEE Information Theory Society, and the Jack S. Kilby Signal Processing Medal and Centennial and Third Millennium Medals from the IEEE. He received a Presidential Award for Excellence in Science, Mathematics and Engineering Mentoring (PAESMEM). He is a member of the National Academy of Engineering.

Hosted by: Jerry Gibson, ECE Chair - RSVP requested to