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CCTV system having improved detection function and detecting method suited for the system

  • US 5,671,009 A
  • Filed: 12/20/1995
  • Issued: 09/23/1997
  • Est. Priority Date: 08/14/1995
  • Status: Expired due to Term
First Claim
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1. An identification code recording apparatus for use in a closed circuit television (CCTV) system which includes a plurality of monitoring cameras which output camera signals to a plurality of channels, frame switching means for switching between the plurality of channels at a frame cycle rate, thereby selecting one of the camera signals, an image recording and reproducing apparatus for recording on a recording medium the camera signal selected by the frame switching means, reproducing the recorded signal from the recording medium, and outputting the reproduced signal to the frame switching means, display dividing means for displaying on a monitor the reproduced signal corresponding to the selected camera signal output through the frame switching means, wherein the reproduced signal is displayed as a multiscreen picture, wherein said frame switching means comprises:

  • a plurality of camera signal input means for inputting via the plurality of channels camera signals output from the plurality of monitoring cameras;

    switching means for switching between the plurality of channels, selecting one of the camera signals input to said plurality of camera signal input means, and outputting a selected camera signal, wherein said switching occurs at a predetermined frame cycle rate;

    sensing means for sensing with respect to predetermined conditions and outputting a sensing signal;

    first detecting means for detecting synchronization signals from said selected camera signal and outputting a first detection signal;

    second detecting means for detecting motion based on said selected camera signal and outputting a second detection signal;

    ID code generating means for generating an ID code in accordance with predetermined physical event and time-of-day conditions based on said sensing signal, said first detection signal and said second detection signal; and

    adding means for adding said ID code generated by said ID code generating means with said selected camera signal, and outputting the result to the image recording and reproducing apparatus.

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