Title :
An elevation of 4800 bps voice coders
Author :
Kemp, David P. ; Sueda, Retha A. ; Tremain, Thomas E.
Author_Institution :
Dept. of Defense, US Govt., Fort Meade, MD, USA
Abstract :
In May 1987 the US Department of Defense announced a survey of 4800-b/s voice coders and invited any interested parties to submit voice-coding algorithms for evaluation. The goals of the survey were to identify a 4800-b/s coder suitable for use in digital secure telephones and to provide a snapshot of the current state of voice-coding technology at that rate. Ten candidate algorithms were submitted by university, commercial, and government organizations. They were extensively tested for intelligibility, voice quality, and robustness, and rated on a set of criteria including complexity, error tolerance, coding delay, maturity, and expandability. A description is given of the evaluation process, and the results are presented
Keywords :
encoding; telephone equipment; vocoders; voice communication; voice equipment; 4800 bit/s; 4800 bps voice coders; algorithm testing; coding delay; complexity; digital secure telephones; error tolerance; evaluation; expandability; intelligibility; maturity; robustness; voice quality; voice-coding algorithms; voice-coding technology; Acoustic measurements; Acoustic testing; Background noise; Linear predictive coding; Loudspeakers; Microphones; Scheduling algorithm; Speech processing; Telephony; US Government;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1989. ICASSP-89., 1989 International Conference on
Conference_Location :
Glasgow
DOI :
10.1109/ICASSP.1989.266399
