DPCM

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DPCM

DPCM

(Differential PCM) A PCM technique that codes the difference between sample points to compress the digital data. Because audio waves propagate in predictable patterns, DPCM predicts the next sample and codes the difference between the prediction and the actual point. The differences are smaller numbers than the numerical value of each sample on the full scale and thereby reduce the resulting bitstream. See PCM, ADPCM and sampling.
References in periodicals archive ?
The Entropia chip leads the market with the capability to process 336 channels of either Pulse Code Modulation (PCM) or Adaptive Differential PCM (ADPCM) on a single chip.
The 7300 ASAM's integrated VoDSL gateway will also support a range of voice encoding technologies including pulse code modulation (PCM) and adaptive differential PCM (ADPCM).
The Entropia chip leads the market with capability to process 336 channels of either Pulse Code Modulation (PCM) or Adaptive Differential PCM (ADPCM) on a single chip.
Telogy Software products support pulse code modulation (PCM) and adaptive differential PCM (ADPCM), low bit rate (LBR) CODECs and other key voice features including silence suppression and echo cancellation.
The Entropia chips for the enterprise market support industry-leading 64, 48, 32, or 24-channel densities using Pulse Code Modulation (PCM) or Adaptive Differential PCM (ADPCM).
TI's VoDSL solutions support pulse code modulation (PCM)/ adaptive differential PCM (ADPCM) implementations as well as low-bit rate CODEC technology.
Entropia provided support for 256 full duplex Adaptive Differential PCM (ADPCM32) AAL2 channels in its initial release in July 2000.
With Telogy Software(TM) Alcatel will be able to provide support for pulse code modulation (PCM)/adaptive differential PCM (ADPCM), as well as low bit rate CODECs that optimize the network's bandwidth resources to more efficiently deliver multiple toll-quality voice lines and data simultaneously.

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