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SnmpTools.net > Glossaries > Networking > ADPCM

ADPCM (Adaptive Differential Pulse Code Modulation) - an explanation

1) Reduced bit rate variant of PCM audio encoding. (See also PCM.) This algorithm encodes difference between actual audio sample amplitude and predicted amplitude and adapts resolution based on recent differential values. (2) Coding scheme standardized by CCITT (See CCITT) that allows analog voice to be carried on 32 Kbps digital channel instead of standard 64 Kbps PCM channel.
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