DVR video/audio sync with 4805

Discussion in 'Displays' started by Wes Nance, Sep 29, 2004.

  1. Wes Nance

    Wes Nance Stunt Coordinator

    Jan 1, 2002
    Likes Received:

    I couldn't help it, I hooked my new 4805 up tonight even though I don't have the right cables, and I'm projecting onto a grey paneled wall, so the picture has cool grooves in it. . .

    Watched regular cable Smallville recorded on my Time Warner DVR, and it seems like the audio/video sync would drift after a while. Resetting the input would help a bit, but still a little off.

    Anyone had this problem? It will be short lived, as I'm switching over to an HD DVR soon.

    I was using the cheap s-video cable that came with the projector, but I didn't have any problems with the same cable on my dvd player.


  2. Joseph Bolus

    Joseph Bolus Cinematographer

    Feb 4, 1999
    Likes Received:
    I've had this problem with a few channels with my cable-supplied DVR and my Infocus X1. It can be attributed to the Faroudja DCDi de-interlacer in the projector.

    If your cable is like mine, many of the lower channels are analog delivered which tends to exaggerate compression artifacts. These artifacts are then further compounded by the DVR recording process. Upon playback of the DVR recording from such a source, the Faroudja chip valiantly attempts to clean up all the resulting "jaggies" before presenting the de-interlaced picture. This can definitely lead to some audio sync problems. Fortunately, upgrading your cable and DVR to HD will render this problem moot.

    BTW, some of the more recent A/V receivers provide a "audio delay" option to help cope with this problem.

Share This Page