Definitions for "Adaptive Differential Pulse Code Modulation"
Keywords:  adpcm, quantizing, pcm, itu, voice
A way to reduce the bandwidth needed by digitized voice channels by half (to 32 Kb from 64 Kb).
A method of speech encoding that calculates the difference between two consecutive coded speech samples, allowing voice signals to be encoded in half the space that standard PCM requires.
Differential pulse code modulation that also uses adaptive quantizing; an audio coding algorithm providing a modest degree of compression together with good quality.