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A 4.8 kbps code-excited linear predictive coderA secure voice system STU-3 capable of providing end-to-end secure voice communications (1984) was developed. The terminal for the new system will be built around the standard LPC-10 voice processor algorithm. The performance of the present STU-3 processor is considered to be good, its response to nonspeech sounds such as whistles, coughs and impulse-like noises may not be completely acceptable. Speech in noisy environments also causes problems with the LPC-10 voice algorithm. In addition, there is always a demand for something better. It is hoped that LPC-10's 2.4 kbps voice performance will be complemented with a very high quality speech coder operating at a higher data rate. This new coder is one of a number of candidate algorithms being considered for an upgraded version of the STU-3 in late 1989. The problems of designing a code-excited linear predictive (CELP) coder to provide very high quality speech at a 4.8 kbps data rate that can be implemented on today's hardware are considered.
Document ID
19880016366
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Tremain, Thomas E.
(Department of Defense Fort Meade, MD, United States)
Campbell, Joseph P., Jr.
(Department of Defense Fort Meade, MD, United States)
Welch, Vanoy C.
(Department of Defense Fort Meade, MD, United States)
Date Acquired
September 5, 2013
Publication Date
May 1, 1988
Publication Information
Publication: Jet Propulsion Lab., Proceedings of the Mobile Satellite Conference
Subject Category
Communications And Radar
Accession Number
88N25750
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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