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Revision as of 19:31, 4 December 2001 by Ap (talk | contribs) (further expanded)(diff) ← Previous revision | Latest revision (diff) | Newer revision → (diff)Pulse Code Modulation (PCM) is a digital representation of an analog signal. The signal is sampled at a sampling frequency fs. This means the value of the signal, a sample, is captured at uniform distances T (= 1/fs). Every sample is quantised to a discrete number of possible values.
PCM is used in digital telephone systems or for digital audio recording on compact discs CD.
See modulation for other examples of modulation techniques.
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