Revision as of 08:04, 9 February 2024 edit InternetArchiveBot (talk \| contribs) Bots, Pending changes reviewers 5,683,617 edits Rescuing 1 sources and tagging 0 as dead.) #IABot (v2.0.9.5) (LeapTorchGear - 17129 ← Previous edit		Revision as of 08:09, 13 April 2024 edit undo 103.156.184.31 (talk) PCM steps includes: sampling, quantization and encoding. so，PCM processes analog signals, not sampled analog signals. Tag: Visual edit Next edit →
Line 30: {{Modulation techniques}} '''Pulse-code modulation''' ('''PCM''') is a method used to [[Digital signal (signal processing)\|digitally]] represent ~~sampled~~ [[analog signal]]s. It is the standard form of [[digital audio]] in computers, [[compact disc]]s, [[digital telephony]] and other digital audio applications. In a PCM [[Stream (computing)\|stream]], the [[amplitude]] of the analog signal is [[Sampling (signal processing)\|sampled]] at uniform intervals, and each sample is [[Quantization (signal processing)\|quantized]] to the nearest value within a range of digital steps. '''Linear pulse-code modulation''' ('''LPCM''') is a specific type of PCM in which the quantization levels are linearly uniform.<ref name="LOC_LPCM" /> This is in contrast to PCM encodings in which quantization levels vary as a function of amplitude (as with the [[A-law\|A-law algorithm]] or the [[μ-law\|μ-law algorithm]]). Though ''PCM'' is a more general term, it is often used to describe data encoded as LPCM.

Pulse-code modulation: Difference between revisions