Single DSP implementation of a 16 kbps sub-band speech coder for portable communications

Author

Dixon, J.L. ; Varma, V.K. ; Sollenberger, N.R. ; Lín, D.W.

Author_Institution

Bellcore, Morristown, NJ, USA

fYear

1989

fDate

23-26 May 1989

Firstpage

184

Abstract

The authors present a real-time single DSP prototype of a 16-kb/s subband speech coder, using a single digital signal processor, for application to digital portable radio communications. The system architecture, coding algorithm, firmware, and hardware of this coder are addressed. Careful attention has been given to the many special design requirements for interfacing to a time-division multiple-access radio link. The coder uses nonlinear quantization improvement in speech quality with negligible added complexity. A single-board full-duplex prototype, based on a TMS320C25, has been designed and delivers good speech quality

Keywords

digital radio systems; digital signal processing chips; encoding; mobile radio systems; speech analysis and processing; vocoders; 16 kbit/s; TMS320C25; coding algorithm; digital portable radio communications; digital signal processor; firmware; hardware; nonlinear quantization improvement; real-time single DSP prototype; single-board full-duplex prototype; subband speech coder; system architecture; time-division multiple-access radio link; Digital signal processing; Digital signal processors; Hardware; Microprogramming; Prototypes; Quantization; Radio communication; Radio link; Signal processing algorithms; Speech processing;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1989. ICASSP-89., 1989 International Conference on

Conference_Location

Glasgow

ISSN

1520-6149

Type

conf

DOI

10.1109/ICASSP.1989.266394

Filename

266394