S.M.F. Smyth, J.V. McCanny

Research output: Contribution to journalArticle


A very high-quality sub-band ADPCM music coding scheme which compresses high-fidelity music signals, bandlimited to 15kHz, to an equivalent PCM representation of only 4 bits per sample, is described. By processing music sampled at 32 kHz, this coder exhibits a total bit rate of only 128kbit/s and is consequently applicable to the ISDN. Subjective tests conducted with this coder have shown that music recovered from the compression scheme is essentially indistinguishable from the original material. The results obtained are of major importance, not only for ISDN and broadcasting, but also for other digital audio technology such as compact disc (CD) and digital audio tape.
Original languageEnglish
Pages (from-to)493-495
Number of pages3
JournalElectronics Letters
Issue number8
Publication statusPublished - 01 Apr 1988

Bibliographical note

Copyright 2004 Elsevier B.V., All rights reserved.

Fingerprint Dive into the research topics of 'HIGH-FIDELITY MUSIC CODING AT 4 BITS.'. Together they form a unique fingerprint.

  • Cite this