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Video security backup system

  • US 5,583,796 A
  • Filed: 06/06/1995
  • Issued: 12/10/1996
  • Est. Priority Date: 06/06/1995
  • Status: Expired due to Term
First Claim
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1. A video security system, comprising:

  • a video monitor connected to receive a monitor video signal and for displaying a video image represented by the monitor video signal;

    a plurality of cameras each disposed at a location remote from said video monitor for producing a camera video signal representing an image of the respective remote location;

    a first switching control unit for receiving configuration data and for generating first switching control signals in accordance with the configuration data;

    a second switching control unit for receiving configuration data and for generating second switching control signals in accordance with the configuration data;

    a video switching unit connected for receiving the camera video signal from each of said plurality of cameras, for receiving the first switching control signals, and for providing the monitor video signal to said video monitor from among the camera video signals in accordance with the received switching control signals;

    configuration selection means for generating the configuration data, said configuration selection means being connected for transmitting the configuration data to said first switching control unit;

    a backup controller connected with said configuration selection means for monitoring the configuration data transmitted to said first switching control unit and providing a duplicate of the configuration data to said second switching control unit in tandem with the transmission of the configuration data to said first switching control unit, said backup controller further comprises detection means for detecting a failure condition of said first switching control unit and for generating a transfer control signal in response thereto; and

    transfer means responsive to the transfer control signal for disconnecting said configuration selection means from said first switching control unit and connecting said configuration selection means to said second switching control unit, wherein said video switching unit further for receiving the second switching control signals generated by said second switching control unit upon the detection of a failure condition by said backup controller.

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