Pull-down detection apparatus and pull-down detection method

Pull-down detection apparatus and pull-down detection method

  • CN 1,825,939 A
  • Filed: 02/22/2006
  • Published: 08/30/2006
  • Est. Priority Date: 02/22/2005
  • Status: Active Grant
First Claim
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1. pull-down detection apparatus, whether be used to detect incoming video signal is to handle the downconverted signal that is generated by down conversion, described device comprises:

  • The pixel comparator, first of in incoming video signal, comprising at least and between second of described first previous field, carry out pixel relatively, and judge between described first and described second, whether to exist pixel to change;

    Comparator is used for compiling the judged result of pixel comparator, and judges between described first and described second whether have image change according to the judged result in the pixel comparator;

    AndThe down conversion determining device judges according to the judged result in the comparator of field whether incoming video signal is downconverted signal,Whether be the history of the judgement of downconverted signal wherein, change the Rule of judgment that whether exists pixel to change in the pixel comparator, and/or change the Rule of judgment that whether has image change in the comparator according to incoming video signal.

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