PCM

Abbreviation for pulse code modulation, a way of digitally recording an audio signal. Used in most 8mm decks and in some high-end VHS and S-VHS decks. Peak to Peak The measurement of any signal from the lowest value to the highest. In a composite or full video signal, this should be 1 Volt.

This is the form of the digital audio signal used for both CD and laserdisc. It is a serial data stream that is coded for transmission or recording. PCM is also used for many other types of serial data communications.