Title :
An expandable error-protected 4800 bps CELP coder (US Federal Standard 4800 bps voice coder)
Author :
Campbell, Joseph P., Jr. ; Welch, Vanoy C. ; Tremain, Thomas E.
Author_Institution :
US Dept. of Defense, Fort Meade, MD, USA
Abstract :
The authors describe a code-excited linear predictive (CELP) coder that was recently selected as the US government standard 4800-b/s voice coder. The coder has the capability for future expansion and is robust to channel errors and noisy environments. Listening tests and DRT (diagnostic rhyme test) and DAM (diagnostic acceptability measure) scores show that the decoder exceeds the performance of all government standard speech coders operating at rates below 16 kb/s and is comparable to 32-kb/s continuously-variable-slope delta modulated coders
Keywords :
speech analysis and processing; vocoders; 4.8 kbit/s; CELP coder; US government standard; channel errors; code-excited linear predictive; continuously-variable-slope delta modulated coders; diagnostic acceptability measure; diagnostic rhyme test; noisy environments; vocoders; Code standards; Decoding; Delta modulation; Measurement standards; Modulation coding; Robustness; Speech; Testing; US Government; Working environment noise;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1989. ICASSP-89., 1989 International Conference on
Conference_Location :
Glasgow
DOI :
10.1109/ICASSP.1989.266532
