| 摘要 |
PROBLEM TO BE SOLVED: To obtain optimum image quality in response to a noise quantity of a video signal by optimally controlling a gain and a coring amount of an image quality improvement circuit in response to the noise amount of a received video signal and providing a field cyclic type noise reduction circuit to a post- stage of the image quality improvement circuit so as to optimally control its cyclic coefficient depending on the noise amount. SOLUTION: Afield cyclic noise reduction circuit 101 detects a noise amount of a video signal from the A/D converted video signal and the detected noise amount is fed to a microcomputer 106 via an IIC bus 10. The field cyclic noise reduction circuit 101 uses a field memory 102 to detect a motion of each pixel of the video signal. The microcomputer 106 controls the cyclic coefficient of the noise reduction circuit in response to a degree of a motion of each pixel and the noise amount obtained through the IIC bus 10 to be an optimum noise reduction amount through the IIC bus. The video signal whose noise is optimally reduced is given to a plurality of circuits, where the image quality is improved.
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