How long until there are digital connections for SACD/DVDA players? DVI vs Firewire?

Discussion in 'Archived Threads 2001-2004' started by james e m, Aug 8, 2002.

  1. james e m

    james e m Second Unit

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    I don't really know too much about thses subjects, so I'm sorry if this has been covered before. I know the use of analog connections with SACD and DVDA players is to stem piracy, but is there an end in sight? Also will the SACD or DVDA players with the digital connections sound better than the ones with analog connections?

    Also, what's the deal with the DVI vs. Firewire debate? Is there any timetable for the decision on that? What technology should I be "rooting" for? IEEE 1394?
    Thanks!
    James

    PS I have no idea why my thread was posted 4 times.
     
  2. Michael Reuben

    Michael Reuben Studio Mogul

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  3. jeff lam

    jeff lam Screenwriter

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    I too have been wondering this. I also wonder about why a special DVD-A player is needed to get multichannel music. What's the difference between the multichannel audio on DVD's through a digital cable and the multichannel audio from a DVD-A player though analog cables. Is there really a sonic difference because the DTS DVD of the Eagles sounds pretty good to me.

    I guess I'm just asking why they just don't keep things just the way they are and just use the standard DVD player with a digital cable to play multichannel audio the same as a video DVD without the video instead of go to all the trouble to make special players and such.
     
  4. james e m

    james e m Second Unit

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    Jeff I have been wondering the same thing as you have. I want to say that I've heard that DVDA is even better than regular dts and DD sound mixes, but I could be wrong.
    James
     
  5. Thomas_Berg

    Thomas_Berg Screenwriter

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    yes, the sound quality on DVD-A is higher than in standard DD/DTS recordings. check the forum FAQ (link is in Vince Maskeeper's sig) for a more in-depth explanation.
     
  6. jeff lam

    jeff lam Screenwriter

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    But is the quality difference worth the extra cost and trouble of getting a new player capable of DVD-A, 3 sets of analog cables, bass management worries, etc.???
     
  7. Pete Jennings

    Pete Jennings Second Unit

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    Jeff, in my opinion, no. Give it a couple of years and everything will finally fall into place... until then, let them have their fight. [​IMG]
    Pete
     
  8. John Kotches

    John Kotches Cinematographer

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    Here's a more meaningful explanation of the difference.

    It all boils down to bandwidth.

    Consider DD, delivered with a bandwidth of 448kbits/second for all 6 channels of data. Input rates vary, but can be as high as 24bit/48kHz. Compression of this datastream exceeds 10:1, and the compression is lossy. This means that input to the front end Dolby Digital decoder doesn't equal the output of the Dolby Digital decoder in your receiver/processor.

    DTS, can be delivered with a maximum bandwidth of 1.5mbit/second. Maximum encoder input is 24bit/96K. Compression of maximum input is a little less than 10:1, with the more common input of 24/48K being in the vicinity of 5:1. Again,

    Both DD and DTS employ a variety of strategies to determine which information is lost. Much of it is based on psychoacoustics and our tested perceptual abilities. However, neither is perfect.

    In comparison to either DVD-A or SACD, these two algorithms simply don't match up -- the more modest the system, the less difference you will hear. That being said, it can be quite daunting for a "normal person" to set up.

    There are standards that are getting closer to market, but I suspect it will be 1 to 2 years before we see them in widespread usage.

    You have to decide how much you value the performance improvement (and it is there).

    No one can dicatate to you your own value equation.

    Regards,
     
  9. jeff lam

    jeff lam Screenwriter

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    I understand this but we should at least be given the option to play DVD-A discs in our standard DVD players through our digital cables. Even though we have some loss in quality we can still get multichannel music without buying new gear. For those that need the absolute best, they can go with the new players and new cables to achieve the best sound with the highest bamdwidth.
     
  10. james e m

    james e m Second Unit

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    Thanks for the info guys, I appreciate your input. To get back to my original post, is there a time table for the digital connections between the player and the receiver? Also can someone give me a thumbnail version of the DVI vs. Firewire debate?
    Thanks!
    James
     
  11. GordonL

    GordonL Supporting Actor

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    From an article posted at High Fidelity Review on the recent gathering of hardware and software manufacturers at Dolby Labs on Aug 9th
     
  12. Justin Lane

    Justin Lane Cinematographer

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    Cary P Stunt Coordinator

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  14. jeff lam

    jeff lam Screenwriter

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    Cool, I didn't even know that. Maybe I'll have to look into some DVD-A discs now. What about SACD? Same deal???
     
  15. Justin Lane

    Justin Lane Cinematographer

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  16. Han

    Han Second Unit

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    As a side note, what you hear in the DD or DTS track may not be the same mix as the DVD-Audio track of the same disc. As evident in some reviews at www.highfidelityreview.com
    the DD and/or DTS tracks are not just lower quality versions of the MLP track, but are sometimes mixed in a different way. I'm not sure what the point is to that, but it seems to sometimes be the case.
     

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