Adaptive differential pulse-code modulation
TECHNIQUE USED TO ENCODE VOICES IN TELEPHONY
ADPCM; IMA ADPCM; Adaptive Differential Pulse Code Modulation; Adaptive quantization; Adaptive Differential Pulse-Code Modulation; SB-ADPCM; Sub-band ADPCM; Adaptive DPCM; Sub-band adaptive differential pulse-code modulation; Adaptive differential PCM
Adaptive differential pulse-code modulation (ADPCM) is a variant of differential pulse-code modulation (DPCM) that varies the size of the quantization step, to allow further reduction of the required data bandwidth for a given signal-to-noise ratio.