发明名称 Noise reduction device and television receiver
摘要 A noise reduction circuit performs noise reduction by an arithmetic operation on an input video signal and its one-frame delayed video signal. At that time, a noise reduction level is always maintained at a constant value that suppresses a trail behind a moving image. An aperture correction circuit performs image-quality correction by using a high frequency component extracted from the video signal as a correction signal. When a detection level of a noise detection circuit exceeds a predetermined value, the level of the correction signal is controlled to decrease. A velocity modulation circuit supplies the high frequency component extracted from the video signal to an auxiliary deflecting coil of a cathode ray tube as a scanning velocity modulation signal so as to perform image-quality correction. When a detection level of the noise detection circuit exceeds a predetermined value, the level of the scanning velocity modulation signal is controlled to decrease.
申请公布号 US2005212972(A1) 申请公布日期 2005.09.29
申请号 US20050089022 申请日期 2005.03.25
申请人 KABUSHIKI KAISHA TOSHIBA 发明人 SUZUKI TAKASHI
分类号 H04N3/32;H04N5/208;H04N5/21;H04N5/213;(IPC1-7):H04N5/213 主分类号 H04N3/32
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