History of LPC Digital Speech and its impact on the Internet Protocol

Created 6 January 2011
Last modified: 30 December 2019

The following material is intended to supplement the article ``Digital speech and the Internet protocol: the 1974 origins of VoIP,'' which appeared in the IEEE Signal Processing Magazine, Vol. 22, July 2005, pp. 87-90, and the 2010 book Linear Predictive Coding and the Internet Protocol: A survey of LPC and a History of of Realtime Digital Speech on Packet Networks, A short book expanding on the basic story.

The book also appeared as a two part article in Foundations and Trends in Signal Processing published by Now Publishers:

"A survey of linear predictive coding: Part I of Linear Predictive Coding and the Internet Protocol," Foundations and Trends in Signal Processing, Vol. 3, No. 3, pp. 153-202.
"A history of realtime digital speech on packet networks: Part II of Linear Predictive Coding and the Internet Protocol," Foundations and Trends in Signal Processing, Vol. 3, No. 4, pp. 203-303153-203.

Supporting materials

Robert M. Gray
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