| 摘要 |
<p>A video signal processing circuit for aperture correction or picture restoration having a high frequency range emphasis filter (27, 41) which provides a signal whose high frequency range emphasized, a plurality of delay circuits (21, 27) connected serially which output signals having different delay times and a selector (22, 28) which effects level comparison among the input signal the output signals with delays and which supplies the maximum or minimum of them to a first limiter (24) as its thereshold level and the minimum or maximum of them to a second limiter (25) as its thereshold level. The first limiter limits the high frequency range emphasized signal and the second limiter limits the output signal of the first limiter. A high frequency component extraction circuit (42) and a noise suppressor (31) which suppress noise in high frequency component and adder (32) which adds together the output of the second limiter and the output of the noise suppressor may be used.</p> |
