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What's PCM?

  PCM audio (Pulse Code Modulation) is a process that is utilized to convert analog audio signals that are represented by wave forms to digital audio signals which are represented by ones and zeros without neither compression nor loss of information. Linear pulse-code modulation (LPCM) is a specific type of PCM where the quantization levels are linearly uniform. This is in contrast to PCM encodings where quantization levels vary as a function of amplitude (as with the A-law algorithm or the μ-law algorithm). Though PCM is a more general term, it is often used to describe data encoded as LPCM. Movies and devices often show audio as "LPCM" but sometimes PCM. A PCM stream has two basic properties that determine the stream's fidelity to the original analog signal: the sampling rate, which is the number of times per second that samples are taken; and the bit depth, which determines the number of possible digital values that can be used to represent each sample. To get a visual

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Types of PCM

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