Pulse Code Modulation
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Pulse Code Modulation (PCM) is a method of recording sound as digital data. The amplitude of the audio signal is sampled at a regular sampling rate, and quantized with a fixed bit depth.
This technology was created by Alec Reeves in 1937.
See also
- Pulse-Density Modulation (PDM)
- Pulse-Amplitude Modulation (PAM)
- A page on PCM history (Archived as of April 6, 2003)