Pulse-code modulation

Pulse-code modulation (PCM) is a digital representation of an analog signal where the magnitude of the signal is sampled regularly at uniform intervals, then quantized to a series of symbols in a digital (usually binary) code. PCM is used in digital telephone systems and is also the standard form for digital audio in computers and various compact disc formats.

Related Topics:
Modulation - Digital - Signal - Sampled - Quantized - Binary - Telephone - Digital audio - Computers - Compact disc

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Several PCM streams may be multiplexed into a larger aggregate data stream. This technique is called time-division multiplexing, or TDM. TDM was invented by the telephone industry, but today the technique is an integral part of many digital audio workstations such as Pro Tools.

Related Topics:
Data stream - Time-division multiplexing - Digital audio workstations - Pro Tools

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