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Pulse-code-modulation (PCM) encoding of digital audio signals has had a long and successful history in the era of the Compact Disc (CD). This brief survey paper argues that it forms the logical way to extend either the bandwidth or the signal-to-noise ratio of a digital audio system, or both, to encompass even higher resolution. Underpinning its operation there are the iron-clad theorems that govern both the sampling-and-reconstruction and the ditheredquantizing processes that lie at its heart. It is adaptable enough to allow fully distortion-free noise shaping to be used if wordlength reduction is necessary, provided that the wordlength is not reduced so far as to cause quantizer overload when using proper dithering.
Author (s): Lipshitz, Stanley P.; Vanderkooy, John
Affiliation:
University of Waterloo, Waterloo, Ontario, Canada
(See document for exact affiliation information.)
Publication Date:
2004-03-06
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Lipshitz, Stanley P.; Vanderkooy, John; 2004; Pulse-Code Modulation--An Overview [PDF]; University of Waterloo, Waterloo, Ontario, Canada; Paper ; Available from: https://aes2.org/publications/elibrary-page/?id=12991
Lipshitz, Stanley P.; Vanderkooy, John; Pulse-Code Modulation--An Overview [PDF]; University of Waterloo, Waterloo, Ontario, Canada; Paper ; 2004 Available: https://aes2.org/publications/elibrary-page/?id=12991