NDLI: A 4.8 kbps code-excited linear predictive coder

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A 4.8 kbps code-excited linear predictive coder

Content Provider	NASA Technical Reports Server (NTRS)
Author	Tremain, Thomas E. Campbell Jr., Joseph P. Welch, Vanoy C.
Copyright Year	1988
Description	A 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.
File Size	287082
Page Count	6
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19880016366
Archival Resource Key	ark:/13960/t9n34r96r
Language	English
Publisher Date	1988-05-01
Access Restriction	Open
Subject Keyword	Communications And Radar Coders Rates Per Time Algorithms Computation Coding Voice Communication Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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