HDTV through projector problem

Discussion in 'Displays' started by Brendan Slagle, Sep 25, 2005.

  1. Brendan Slagle

    Brendan Slagle Auditioning

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    OK. I have a problem... I have an Epson Powerlite 7350 lcd projector capable of HDTV, and an HDTV Cable box with HDTV cable but I cant get from the cable box to the projector with it. The projector is a little older and has many inputs, they are as follows:

    RGBHV BNC
    YCbCr BNC
    single RCA video input
    2 VGA inputs

    The cable box also has several outputs:

    YPbPr RCA
    DVI-D
    IEEE something port
    USB

    Currently I am running the YPbPr RCA to BNC adapters into the YCbCr and regular cables work fine but HD channels blank out. Is it possible to get HD through the VGA input? I found a component to VGA adapter cheap. If not, what is the cheapest way to get HDTV from the box to the projector?
     
  2. John Whittle

    John Whittle Stunt Coordinator

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    You first need to find out from your cable company if they output HDTV on anything other than the DVI-D port. Many don't because of copy protection and new boxes output on HDMI.

    They MAY be able to turn on the component (Y Pb Pr) port.

    This is the problem many early adopters are finding now trying to get an HDTV signal to their sets which lack the DVI and HDMI inputs. There are adapters for DVI to HDMI but if you projector doesn't accept digital inputs, then any adapter is going to produce the same blacked out result.

    See what your cable company can come up with.
     
  3. Brendan Slagle

    Brendan Slagle Auditioning

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    The cable box does have HDMI out also, and does put out an analog HDTV signal through the component YPbPr. I heard that YCbCr is a digital input and is encoded differently than the YPbPr signal. I was just hoping that somebody else might have run into a simmilar problem. Is VGA a digital signal or at least capable of HDTV?
     
  4. ChrisWiggles

    ChrisWiggles Producer

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    This is correct, YCbCr is digital component video, while YPbPr is analog component video. *However!* many times equipment manufacturers mislabel their inputs outputs, so most likely the "YCbCr" input on your projector is YPbPr, they just labeled it wrong. That it's 3xBNC connectors tells me it's YPbPr, plus obviously you can see SD just fine.
     
  5. JeremyErwin

    JeremyErwin Producer

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    VGA is an analog RGB port. It's more or less equivalent to RGBHV-- you can buy cables with VGA on one end, and RGBHV on the other. (A few ATSC tuners--Samsung SIR-T165 for one--have VGA ports, but it's a relatively uncommon feature...) You might be able to use this HDCP compliant DVI-->VGA converter. Beats the hell out of me how dtrovision plans to retain a hdcp license, but hey...

    The manual did imply that you can set you projector to either automatically detect the video format, or to only display a single format. The setting looks like it's in the Advanced menu, under "Video Signal". Try setting it to Auto, if it's not already
     
  6. Allan Jayne

    Allan Jayne Cinematographer

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    I couldn't find out how you choose what output resolution you want from the Dtrovision gadget. From the physical size of the gadget I am guessing it delivers only regular VGA (640 x 480) regardless of the input (up to 1600 x 1200 non-interlaced or 1920 x 1080 interlaced). HDCP protected source material may be output as analog downconverted to 480p format within the HDCP compliant specs.

    Video hints:
    http://members.aol.com/ajaynejr/video.htm
     
  7. JeremyErwin

    JeremyErwin Producer

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