| 摘要 |
<p>A circuit is for detecting the quantity of the noise according to the strength of the received image signal and the alteration ratio of the screen, and for reducing the noise included in the image signal. The noise reduction circuit has a delay circuit (40) to delay the luminance signal divided from the image signal for a time, a compensating controller (70) for producing the compensating signal of the image alteration, and four multiplexer (60-63). A video IF detector (31) outputs the AGC signal corresponding to the received image signal.</p> |
