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'''Pulse Code Modulation''' (PCM) is the technology used to digitally encode an analog signal, as used in digital ] systems or for digital audio recording on compact discs ]. '''Pulse Code Modulation''' (PCM) is a digital representation of an analog signal. The signal is sampled at a sampling frequency f<sub>s</sub>. This means the value of the signal, a sample, is captured at uniform distances T (= 1/f<sub>s</sub>). Every sample is quantised to a discrete number of possible values.






PCM is used in digital ] systems or for digital audio recording on compact discs ].
''This a rather poor description: more needed here.''






Revision as of 19:31, 4 December 2001

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.


/Talk