DTS on CD same as DTS on DVD?

Discussion in 'Archived Threads 2001-2004' started by PaulKH, Mar 5, 2002.

  1. PaulKH

    PaulKH Second Unit

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    Sorry for the dumb question. I expect the answer is 'no'.
     
  2. Michael Reuben

    Michael Reuben Studio Mogul

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    Your expectation is correct! [​IMG]
    DTS on CD looks like PCM to the player. Any player that can pass a CD's PCM digital output can pass the DTS signal (which means every DVD player ever made). The encoding format for DVD is quite different and wasn't finalized until after the first generation of players was released, which is why they can't "find" the DTS bitstream on a DTS DVD.
    I still have an original Sony 7000 player, and I use it to play DTS CDs all the time. But it wouldn't know a DTS DVD from a slice of pizza.
    M.
     
  3. Philip Hamm

    Philip Hamm Lead Actor

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    Actually your 7000 would work fine with DTS DVDs it just wouldn't be able tp play the DTS track. Even on the early DTS DVDs there's a "compatability" track that's either PCM or DD to meet the DVD spec.
     
  4. Wayne Bundrick

    Wayne Bundrick Cinematographer

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    Furthermore, DTS on CD is based on 44.1 kHz sampling and has a 1.411 Mbps data rate (since it is masquerading to be PCM on the CD). DTS on DVD is based on 48 kHz sampling and has a data rate of either 1.536 Mbps or half that, or perhaps like Dolby it may support a variety of rates in between.
     
  5. Michael Reuben

    Michael Reuben Studio Mogul

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  6. Andrew_Ballew

    Andrew_Ballew Second Unit

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    Question that I have always had-

    The CD (and laserdisc) PCM standard is 16 bit, 44khz. Now I know as you have said that DTS on CD and laserdisc adheres to the 44khz standard to maintain the 1411kbps data rate. But is it 16 bit or 20 bit? I have DTS CD's that are advertised as being 20 bit, but that would seem to deviate from the redbook PCM standard.

    Just a question I have always had and never had answered.

    Thanks

    Andrew Ballew
     
  7. PaulKH

    PaulKH Second Unit

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    Thanks - so is DTS audio off CD not as good as DTS audio off DVD? And is DTS audio off CD always 5.1?
     
  8. Philip Hamm

    Philip Hamm Lead Actor

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    Andrew,

    DTS CD is 20 bit.
     
  9. Jah-Wren Ryel

    Jah-Wren Ryel Stunt Coordinator

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    Furthermore, DTS CDs are a huge violation of the redbook standard. You won't find the compact disc logo on a DTS CD, because it is licensed by Phillips who won't license its use on non-conforming discs.
     
  10. rodneyH

    rodneyH Supporting Actor

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    just a note, you can burn a DTS cd in 2 channel AND surround sound discs (they must be CD NOT DVD!!!) off of a cd burner
     
  11. Michael Reuben

    Michael Reuben Studio Mogul

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  12. Philip Hamm

    Philip Hamm Lead Actor

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    Actually, there are a lot of 4.0 DTS CDs, I have at least three of them. One of the first thing that the DTS CD producers did when the format came out was to resurrect some of the original old Quadrophonic mixes from the 70s. I have the two Paul McCartney Quad DTS CDs (and I love them) and the Beck, Bogert, & Apice DTS Quadrophonic disc. They all sound really fantastic IMO.
     
  13. Michael Reuben

    Michael Reuben Studio Mogul

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  14. Andrew_Ballew

    Andrew_Ballew Second Unit

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  15. Philip Hamm

    Philip Hamm Lead Actor

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    I don't know if DTS can even work at 16 bit. It's a 20 bit audio format (as is Dolby Digital).
     
  16. Andrew_Ballew

    Andrew_Ballew Second Unit

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    Let me rephrase-

    How can a 20 bit DTS soundtrack can reside in a 1411 kbps PCM stream without an increase in bit rate? The DTS track is reduced from 48khz to 44khz to fit into the PCM stream. It would seem to me that likewise the 20bit audio would push the signal out of the 1411 kbps range, rendering it unable to reside on a CD or Laserdisc.

    I know that DTS audio is 20 bit- no argument. My question is about how the signal is able to fit into the 1411kbps stream at 20 bit, when the DTS 48khz signal does not fit into the 1411kbps stream- it has to be reduced to 44khz.

    All this in regards to the fact that 1411kbps PCM audio is normally 16 bit, 44 khz.

    Thanks

    Andrew Ballew
     
  17. Philip Hamm

    Philip Hamm Lead Actor

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    I think you need to direct your questions to DTS.
     
  18. RicP

    RicP Screenwriter

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  19. Larry Geller

    Larry Geller Supporting Actor

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  20. Larry Geller

    Larry Geller Supporting Actor

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    double post deleted
     

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