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delta modulation (DM)

Delta modulation( DM) is a type of differential pulse code modulation( DPCM) which differs in that the adjacent samples can only differ from the real sample by the values +1 or -1.

Delta modulation

Delta modulation

This means that only one bit is used to encode adjacent samples. Fast and high signal changescan be captured by increasing the sampling rate. However, a good speech quality requires a bit rate of more than 200 kbit/s. If the step height is adapted to the signal to be sampled, delta modulation becomes adaptive delta modulation( ADM).

Among other things, delta modulation is used in the sigma-delta converter.

Englisch: delta modulation - DM
Updated at: 05.09.2011
#Words: 101
Links: modulation, data mart (DM), differential pulse code modulation (DPCM), differential pulse code modulation (DPCM), signal
Translations: DE

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