Does MiniDV capture 4 channels of audio that can be used for 5.1?

Discussion in 'Amateur Video Production' started by SC Miata, Jul 6, 2005.

  1. SC Miata

    SC Miata Guest

    I have a Sony DCR-HC1000 and the optional ECM-CQP1 four channel microphone.
    When all four audio channels are connected, the rear channels are somehow
    captured to the tape. Then, using a proprietary Sony application (Click To
    DVD) that is only available preinstalled on VAIO computers, you can then
    cerate a 5.1 DVD based on the four channels of sound. I am wondering how
    this information might be encoded onto the DV tape and how it might be
    extracted for use as 5.1 with an application other than Click To DVD. Would
    an application such as Adobe Premier Elements allow you to capture rear
    channels and apply them to the rear channels of a 5.1 sound track? Would any
    info on this topic.

    Thanks
     
    SC Miata, Jul 6, 2005
    #1
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  2. The miniDv spec allows for two 16-bit audio channels (left and right,
    of course) or four 12-bit audio channels, where two of these are used
    for left and right audio during taping, and the other two are not
    recorded. They are expected to be recorded to in editing, in camera or
    on the computer.

    Lots of miniDV camcorders come configured to record 12-bit from the
    factory, which lots of people don't like because the quality is
    inferior to the 16-bit recording.

    <SPECULATION>
    Finally to the point: perhaps the HC1000 uses the four 12-bit channels
    to record the four microphone channels.
    </SPECULATION>

    Gino
     
    Gene E. Bloch, Jul 6, 2005
    #2
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  3. SC Miata

    Markus Zingg Guest

    If the tape as you have recorded it is still a mini DV tape following
    this standarrd, that said can be played in other DV equipement, then
    its clear that Sony simply records the four channels as 12 bit audio.

    The room per frame (number of bytes per frame which is available for
    audio) is clearly defined. If they would do "in camera audio
    compression" or use a "bigger" frame the tape would no longer be
    playable in other equipement.

    There is no reason why other than Sony software in theory therefore
    could create 5.1 out of this information. I was thinking myself about
    such a feature back when I implemented DV video support in AVI_IO
    which mostly boiled down to writing code extracting audio out of the
    frame in order to create Type 2 DV avi files.

    Markus
     
    Markus Zingg, Jul 6, 2005
    #3
  4. Appears to use the DV-standard 4-track, 12-bit method of recording
    audio. This was never very popular because of the low-resolution (i.e.
    distorted) nature of the 12-bit audio. There are likely some capture
    software that will properly interperet the 4-track, 12-bit audio. But
    likely not very available as most of us stick to 2-track, 16-bit audio.
     
    Richard Crowley, Jul 6, 2005
    #4
  5. SC Miata

    SC Miata Guest

    Thank you for the replies everyone. It is indeed 12 bit audio when recording
    all four channels.
     
    SC Miata, Jul 7, 2005
    #5
  6. SC Miata

    GeekBoy Guest

    A company does sell surround sound microphone.
    I would have to look it up if you are interested.
     
    GeekBoy, Jul 7, 2005
    #6
  7. SC Miata

    SC Miata Guest

    Sure, that would be interesting to know. Thanks. I already have the Sony
    ECM-CQP1 four channel microphone, though. Is the one you are wanting to sell
    any better than the Sony?
     
    SC Miata, Jul 7, 2005
    #7
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