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Dolby Digital Plus

Discussion in 'Arcam Owners' Forum' started by yves, May 24, 2005.

  1. yves

    yves
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    Hi,

    I read that new formats will be available when the new DVD will reach the market at the end of this year (HD DVD and Blue Ray).

    Are we going to get these new formats (Dolby Digital Plus and there is also an equivalent for DTS) by software upgrade for the AVR300?

    Yves
     
  2. Crustyloafer

    Crustyloafer
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    Possible but unlikely. Arcam's goal is to fully support current formats such as DVD. HD-DVD and Blu-Ray are a long way off being a mass market product, for a start there needs to be only one format.
     
  3. Nic Rhodes

    Nic Rhodes
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    I suspect that very few of the currently available receivers will be capable of doing DD plus and the equivalent DTS format, even the posh stuff.
     
  4. Matt Horne

    Matt Horne
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    Ok.. I'll ask.. whats the difference with the new formats ? Is it just higher bitrates ?

    Matt
     
  5. Stevesky

    Stevesky
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    In the case of Dolby Digital Plus:
    1. Bit rates up to 6Mbps (at the moment limited to 640kb on DD)

    2. Full discrete channel support of 7.1 and beyond (at the moment only 5.1 discrete on DD)

    3. Interactive mixing and streaming functionality.

    4. Multiple languages to be carried in a single bit stream.

    5. Backwards compatible as format can be down converted by source equipment to 640kbps to support S/PDIF.

    6. Improved audio performance on low bit rate material (more for the TV industry where one always wants to squeeze more into existing bandwidth)

    DTS-HD also adds lossless audio to the party so you hear it in all it's uncompressed glory.

    Remember that the new formats do have a backwards compatibility mode so will work on older kit BUT you won't get the full benefits. Also a AV processor that supports HDMI 1.1 audio could get DTS-HD and DD Plus if the source HD equipment does the decode (hence produces multi channel LPCM) before it sends it out the HDMI port.

    It may be unrealistic for many existing AV processor designs to decode DTS-HD and DD Plus due to insufficiently processing power in the decoder IC's or inability to upgrade the algorithms in them.
     

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