Title :
G.722: a new CCITT coding standard for digital transmission of wideband audio signals
Author :
Mermelstein, Paul
Author_Institution :
McGill Univ., Montreal, Que., Canada
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;
Journal_Title :
Communications Magazine, IEEE
