CELP coding for land mobile radio applications

Author

Rahikka, Douglas J. ; Tremain, Thomas E. ; Welch, Vanoy C. ; Campbell, Joseph P., Jr.

Author_Institution

Dept. of Defense, Fort Meade, MD, USA

fYear

1990

fDate

3-6 Apr 1990

Firstpage

465

Abstract

The performance of the Proposed Federal Standard 1024 8000-b/s system for digital land mobile radio on a 12.5- or 6.25-kHz channel is described. The system contains the Proposed Federal Standard 1016 4800-b/s code excited linear predictive (CELP) voice coder developed by the US DOD and AT&T Bell Laboratories. The system is error protected with 2400 b/s and has 800 b/s for overhead signaling. The system is intended to replace the 12 kHz continuous variable slope deltamod (CVSD) voice coder which is used in Federal Standard 1025. The error protection technique used is Golay coding with hard or soft decoding. The performance of this error protection over simulated fading radio channels is described

Keywords

digital radio systems; encoding; filtering and prediction theory; mobile radio systems; speech analysis and processing; vocoders; 12.5 kHz; 6.25 kHz; 8 kbit/s; CELP voice coder; Golay coding; Proposed Federal Standard 1016; Proposed Federal Standard 1024 8000-b/s system; code excited linear predictive voice coder; digital land mobile radio; error protection; simulated fading radio channels; Adaptive coding; Books; Code standards; Decoding; Fading; Forward error correction; Land mobile radio; Protection; Speech coding; Speech synthesis; Standards development; Stochastic processes; US Department of Defense;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1990. ICASSP-90., 1990 International Conference on

Conference_Location

Albuquerque, NM

ISSN

1520-6149

Type

conf

DOI

10.1109/ICASSP.1990.115750

Filename

115750