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What does PCM mean?

Discussion in 'Archive' started by jlabsher, Mar 2, 2003.

  1. jlabsher

    jlabsher Mentor

    Aug 26, 2002
    I know what Dolby is, but what is PCM. When I am watching a channel that isn't Dolby Digital and listening through my receiver it displays "PCM 48". Also I have noticed that some of the STARZ channels have movies that are Dolby Digital but not listed that way in the program guide (at least that is what the receiver displays.)
  2. Frank Z

    Frank Z Godfather

    Nov 15, 2002
    PCM stands for Pulse Code Modulation.
  3. ibglowin

    ibglowin Godfather/Supporter DBSTalk Gold Club

    Sep 10, 2002
    And the 48 is the data bit rate/ seconds.
  4. Mike123abc

    Mike123abc Hall Of Fame/Supporter DBSTalk Gold Club

    Jul 19, 2002
    It is essentially uncompressed digital data. Dolby Digital is compressed, MP3 is compressed.
  5. Me

    Me Guest

    PCM - Pulse Code Modulation

    48 - 48kHz (sampling rate).

    This means that it's uncompressed PCM audio, with 48,000 audio samples a second, for an effective frequency response of 24kHz. Of course the resolution of those samples matters a lot also to quality...

    "And the 48 is the data bit rate/ seconds."

    Nope, it's not the data rate, it's the sampling rate in kHz.

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