Title :
A high quality speech coder at 400 bps
Author :
Liu, Y.J. ; Rothweiler, Joseph
Author_Institution :
ITT Defense Commun. Div., Nutley, NJ, USA
Abstract :
A high-quality speech coder at 400 b/s has been developed. This coder is designed to provide reliable communication over an HF channel in a hostile environment. The major techniques utilized for coding include vector quantization, interpolation, and trellis coding. The test results in the presence of speaker variations, background noise, and acoustic impairments are discussed. The three speaker average DRT was 80 for this coder
Keywords :
codecs; encoding; telephone equipment; voice communication; voice equipment; 400 bit/s; HF channel; acoustic impairments; background noise; coding; hostile environment; interpolation; reliable communication; speaker variations; speech coder; three speaker average DRT; trellis coding; vector quantization; Acoustic testing; Background noise; Decoding; Filters; Loudspeakers; Protection; Reflection; Speech analysis; Speech coding; Vector quantization;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1989. ICASSP-89., 1989 International Conference on
Conference_Location :
Glasgow
DOI :
10.1109/ICASSP.1989.266400
