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Help - PCM or Bitstreaming

Discussion in 'Blu-ray & DVD Players & Recorders' started by Theriomophic, Sep 23, 2005.

  1. Theriomophic

    Theriomophic
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    Hi,

    I have just purchased a new Samsung HD950 and have it connected via HDMI to my LE40r51B HD set. I have it also connected via optical cable to my sony amp.

    Please can you let me which setting is best? :confused:

    Many thanks

    T
     
  2. MrNPG

    MrNPG
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    As you have it connected to your amp, you should use Bitstream.
     
  3. Theriomophic

    Theriomophic
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    Thanks for the reply.

    Just out of curiosity - can you please tell me why? As I really have no clue about this sort of stuff?

    Thanks again for the prompt response. :thumbsup:

    T
     
  4. MrNPG

    MrNPG
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    To be honest with you, I don't really know the reason why, just know that bitstream should be used when you connect your DVD player to an A/V amp.

    :)
     
  5. Theriomophic

    Theriomophic
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    Thanks anyway. :thumbsup:

    T
     
  6. Spacedog

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    As far as i know, you need to use Bitstream in order to enjoy 5.1 sound (DD or DTS). If you set the DVD player to PCM, you'll only get 2 channel audio from the DVD disc into the A/V amp (and also into the stereo downmix analog outs of the player), even if the audio soundtrack playing is 5.1.

    PCM is ok when you have only a stereo speaker setup. :thumbsup:
     
  7. pknarb

    pknarb
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    When set to "bitstream", the DVD player will stream sound data unaltered to the amplifier.

    When set to "PCM", the DVD player will "downmix" to two channel PCM (Stereo) and sound will only be heard from left and right speaker.
     
  8. MrNPG

    MrNPG
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    I thought it was something to do with the "downmixing" but wasn't sure. :)
     
  9. Spacedog

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    pknarb, if you're for example playing a DVD disc with a Dolby Digital soundtrack, which has a 96khz audio data sampling, and you choose "PCM", what will be the sampling of the stereo downmix?

    This question arises because of the option "LPCM out" that you also have in most players. This option lets you choose from 48khz, 96khz and 192khz but i'm not quite shure what it's used for... do you? Does this option only applies when you choose "PCM" instead of "Bitstream"?

    Thankx!
     
  10. Theriomophic

    Theriomophic
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    Thanks for the reply.


    T
     
  11. Spacedog

    Spacedog
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    Anyone?? :confused:
     
  12. pknarb

    pknarb
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    Spacedog, the HD950 has a setting called "PCM Down Sampling". Judging by the name of the setting it should only alter the sampling rate of a downmix and not a "bistream".
     
  13. Stingingwasp

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    Just for info Theriomophic, as you have the DVD connected via HDMI, when you select Bitstreaming you will get a message saying "HDMI audio not supported". it only stays there for a few seconds.
    You can ignore it this warning. its annoying bug that the HD850 has, and i belive it is present in the 950 also.
     
  14. Theriomophic

    Theriomophic
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    You guys are awesome and foooking clever :lesson:

    Thanks for all the help fellas. :clap:

    T
     
  15. Spacedog

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    What about Dolby Digital 2.0 (96Khz) or 2 channel DVD-Audio (192khz)?? Are they considered PCM (being 2 channel...) and hence affected by this setting (even if I'm configured to use "Bitstream")?? :confused:

    Or does PCM only apply to CDs and "stereo downmixes"? :confused: :confused:
     
  16. pknarb

    pknarb
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    I would imagine "bitstream" is straight through with no intervention at all from the DVD player.
     
  17. Spacedog

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    That's what makes sense to me too, but I just wanted to make sure :)

    Thank you! :thumbsup:
     

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