| 摘要 |
The present invention relates to a video signal determining apparatus adapted to correctly detect a filmed video signal. A subtraction circuit 5 operates a difference between a color difference signal B-Y delayed one field outputted from a 1-field delay circuit 3 and a color difference signal B-Y before delay. In the case of a 4:2:0-formatted signal, the color difference signals in the corresponding positions of fields configuring the same frame are same in value. The output of the subtraction circuit 5 is 0 in the case that the input thereof is a signal of a field of the corresponding frame, and not 0 in the case that it is a signal of a field of the different frame. An addition circuit 6 cumulatively adds together, over one field, the output of the subtraction circuit 5. A comparator circuit 7 outputs 1 in the case that the addition value is greater than a reference value, and 0 in the case smaller than the reference value. A controller 8 determines whether the inputted signal is a filmed video signal or not, from a pattern of 1 and 0 outputted from the comparator circuit 7. The present invention can be applied to a DVD player.
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