G.722: a new CCITT coding standard for digital transmission of wideband audio signals

Author

Mermelstein, Paul

Author_Institution

McGill Univ., Montreal, Que., Canada

Volume

26

Issue

1

fYear

1988

Firstpage

8

Lastpage

15

Abstract

CCITT Study Group XVIII recognized the need for a new international coding standard on high-quality audio to allow interconnection of diverse switching, transmission, and terminal equipment and organized an expert group in 1983 to recommend an appropriate coding technique. A tutorial discussion is provided of the adaptive differential PCM (pulse-code modulation) coding method recommended by the group. The discussion covers the subjective performance tests performed, mode initialization and mode switching, data-speed multiplexing, and communication between narrowband and wideband terminals.<>

Keywords

audio systems; digital communication systems; encoding; pulse-code modulation; standards; CCITT coding standard; G.722; adaptive differential PCM; data-speed multiplexing; digital transmission; diverse switching; high-quality audio; international coding standard; mode initialization; mode switching; narrowband terminals; wideband audio signals; Bridges; Decoding; Encoding; Narrowband; Phase change materials; Speech coding; Speech recognition; Wideband;

fLanguage

English

Journal_Title

Communications Magazine, IEEE

Publisher

ieee

ISSN

0163-6804

Type

jour

DOI

10.1109/35.417

Filename

417