EX decoding on non-EX discs.

Discussion in 'Archived Threads 2001-2004' started by EricW, Dec 27, 2002.

  1. EricW

    EricW Cinematographer

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    how does this work? i have the example of Ballistic: Ecks Vs. Sever. this is a non-EX disc. however, 1) my amp (Pioneer VSX-D811s) displays EX. and 2) there are scenes where the back center speaker plays stuff that isn't in the left or right backs. specifically, machine gun shots at the 31:08 minute mark. so in other words it sound like an EX disc.
     
  2. TimTurtino

    TimTurtino Stunt Coordinator

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    It's called matrixing. Basically, stuff that would have been sent to both speakers (to create the illusion of being right behind you) is instead sent to the rear center, and only the stuff unique to either side stays in that side.

    This is why DTS-ES (matrixed) is backwards compatible with Plain Old DTS.

    If you turned off that rear center speaker in the Pioneer's menuing system, you'd find that, in fact, that information was in both the left and right surrounds.

    Me
     
  3. EricW

    EricW Cinematographer

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    but i thought that only DD-EX discs had a matrixed back center channel? that's what i don't understand...
     
  4. John Garcia

    John Garcia Executive Producer

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    EX is a matrix mode only, not discrete, so even when you are watching an EX movie, the rear center is extracted the same way. Your receiver can matrix a rear center out of 5.1 material if set to that mode, though I have found that it doesn't sound quite as good as material that is mastered EX or ES Matrix/Discrete.
     
  5. Michael Reuben

    Michael Reuben Studio Mogul

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  6. TimTurtino

    TimTurtino Stunt Coordinator

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    Oops, my bad. I switched over to DTS-ES (matrixed) instead of DD-EX. The explanation stays exactly the same however, as others pointed out.

    Me
     
  7. Nick A. G.

    Nick A. G. Auditioning

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    DTS-ES comes in both matrixed and discrete modes. Depending on your receiver's decoding hardware, it might be able to do just Matrix mode or even both. There are a handful of movies that are actually encoded for true DTS-ES Discrete. Gladiator is one of the few. In this case, there was actually a real sixth channel encoded in the soundmix. Not too common yet, though.
     
  8. John Garcia

    John Garcia Executive Producer

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  9. Jeremy-J

    Jeremy-J Auditioning

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    Does this mean I should use the a & b speaker functionality of my reciever (denon avr 5802)? That I should use the a speakers (7.1) when I'm watching a es/ex movie, and use the b speakers (5.1) when watching any other movie?

    If I were to do this the speakers in the 7.1 setting should be directly left and right and behind, and in 5.1 the rear should be behing and to the right and left?

    Thanks.
     
  10. TimTurtino

    TimTurtino Stunt Coordinator

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    This is entirely off-topic, but WOWZERS does that thing have a lot of stuff on the back.

    I'm not going to take a strong position on this issue, but recommend looking at the nifty chart on P. 50 of your owner's manual (well, it's on p. 50 of the 5803's user manual, and I assume that's close...), where it lists what mode the receiver should be in for any given kind of source...

    There's also some neat stuff on p. 71 of that 5803 manual.

    Wowzers....

    Me
     

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