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A 9.6 kb/s speech coder using the Bell laboratories DSP integrated circuit

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4 Author(s)
Crochiere, R.E. ; Bell Laboratories, Murray Hill, New Jersey ; Cox, R. ; Johnston, J.D. ; Seltzer, L.

A digital speech coder has been designed for real-time operation for a data rate of 9.6 kb/s. The design is based on a combination of two speech compression techniques: Time-Domain Harmonic Scaling (TDHS) and Sub-Band Coding (SBC). It is a highly modularized hardware implementation using five Bell Laboratories Digital Signal Processor (DSP) integrated circuits as the key processing elements. Three DSPs are used in the encoder for pitch detection, TDHS compression and sub-band encoding. Another two DSPs are used in the receiver for sub-band decoding and TDHS expansion.

Published in:

Acoustics, Speech, and Signal Processing, IEEE International Conference on ICASSP '82.  (Volume:7 )

Date of Conference:

May 1982