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

J. L. Dixon*, V. K. Varma, N. R. Sollenberger, David W. Lin

*Corresponding author for this work

    Research output: Contribution to journalConference articlepeer-review


    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.

    Original languageEnglish
    Pages (from-to)184-187
    Number of pages4
    JournalICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
    StatePublished - 1 Dec 1989
    Event1989 International Conference on Acoustics, Speech, and Signal Processing - Glasgow, Scotland
    Duration: 23 May 198926 May 1989


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