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Definition of "Pulse Code Modulation" |
Pulse Code Modulation is a method used to digitally represent sampled analog signals. It is the standard form of digital audio in computers, Compact Discs, digital telephony and other digital audio applications. / Multiple Frequency is a signaling system that was introduced by the Bell System after World War II. It uses a combination of tones for address and supervision signaling. The signaling is sent in-band over the same channel as the bearer channel used for voice traffic. |
Definition of "Pulse-Code Modulation" |
[PCM] A modulation system in which the standard values of a quantized wave are indicated by a series of coded pulses. PCM Code Definitions. Modulation in which a signal is sampled, and the magnitude (with respect to a fixed reference) of each sample is quantized and digitized for transmission over a common transmission medium. / Pulse-Code Modulation is a method used to digitally represent sampled analog signals. It is the standard form of digital audio in computers, Compact Discs, digital telephony and other digital audio applications. In a PCM stream, the amplitude of the analog signal is sampled regularly at uniform intervals, and each sample is quantized to the nearest value within a range of digital steps. / The amplitude level of the undesired background noise. |
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