Dolby Digital - Mono?

Discussion in 'Archived Threads 2001-2004' started by Robert Woods, Jan 24, 2002.

  1. Robert Woods

    Robert Woods Stunt Coordinator

    Jan 22, 2001
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    I've found some Region 2 discs marked with the official 'Dolby Digital' logo that are absolutely Mono.
    When you read Dolby's stuff at - this is certainly possible.
    But at the same time I see all kinds of menus where Dolby Digital is the alternative to Dolby Surround - yet never says it is 5.1. And I've seen Dolby promos that just say 'Dolby Digital' - and one gets a demo of 5.1/6.1
    How did this happen? Dolby Digital 'seems' to now mean 5.1/6.1 - yet it also can just as well be describing Mono?
    To make things much 'easier' for the consumer :) - have you people also noticed that you almost need a MAGNIFYING GLASS when looking at the back of a DVD to find out what sound system has been used? What's the deal with keeping it so 'secret?'
    It would seem to me that the system for denoting sound should be:
    Dolby Digital 1.0
    Dolby Digital 2.0
    Dolby Digital 5.1
    Dolby Digital 6.1EX
  2. Chuck Kent

    Chuck Kent Supporting Actor

    May 29, 1999
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    I see your point. But "Dolby Digital" is Dolby's name for what they once called AC-3. IOW, the decoding algorithm used to convert full range audio into a compressed digital state. The terms AC-3 or Dolby Digital never meant 5.1, 6.1, 2.0 or any other number of channels.

    Most of the region 1 DVD packages I've bought are marked with the number of channels used for the program inside. Unfortunately, the number of channels can often be very tiny and hard to read. (And, as you noted, sometimes it's not marked at all.)
  3. Michael Reuben

    Michael Reuben Studio Mogul

    Feb 12, 1998
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