differential pulse-code modulation
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differential pulse-code modulation[dif·ə′ren·chəl ′pəls ‚kōd ‚mäj·ə′lā·shən]
A type of pulse-code modulation proposed for television transmission, in which only the differences between the continuous picture elements on the scanning lines are transmitted, enabling the bandwidth of the signal to be reduced. Abbreviated DPCM.