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Convention Paper

An All Digital -Commentary Grade- Sub-Band Coder

Authors: Johnston, James D.; Crochiere, Ronald E.

AES Convention 63 · Paper 1463 · May 1979

Abstract

This paper presents a design for an all digital two band sub-band coder to provide "commentary quality" speech and music over a single slot in a Tl carrier system. It provides a 7 kHz bandwidth at a transmission rate of 56 kb/s with no noticeable distortions or noise under normal "casual listening" environments. It provides a better quality and a more robust performance than a previously discussed analog coder. The design incorporates a number of new digital techniques including quadrature mirror filtering, and high quality A/D and D/A conversion circuits.

Details

Published in
AES Convention 63
AES Convention
63
Paper number
1463
Publication date
May 6, 1979
Affiliation
Acoustic Research Department, Bell Laboratories, Murray Hill, NJ (See document for exact affiliation information.)
Type
Convention Paper