What is pulse code modulation? - Networking

What is pulse code modulation?

Pulse Code Modulation:

- A digital representation of an analog signal.

- Signal sampling is done with the magnitude of the signal regularly at uniform intervals.

- Later quantized to a series of symbols in binary form.

- PCM is used in digital telephone systems and electronic musical keyboards.

- It is the standard form for digital audio in computer systems

- The signals are binary and are in two possible states i.e. logic 1(high) and logic 0 (low).

- At the receivers end a pulse code demodulator will convert the binary numbers into pulses having the same quantum levels.

- The pulses further are processed to restore the original analog waveform.
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