| 摘要 |
PCT No. PCT/JP88/00288 Sec. 371 Date Jan. 10, 1989 Sec. 102(e) Date Jan. 10, 1989 PCT Filed Mar. 18, 1988 PCT Pub. No. WO88/07309 PCT Pub. Date Sep. 22, 1988.A noise reduction circuit in which a video signal (SI) is divided into a first signal (SL) having low frequency component and a second signal (SH1) having high frequency component, the above second signal (SH1) is divided into a third signal (SH2) having an amplitude more than a predetermined value and a fourth signal (SH3) having an amplitute less than the predetermined value, a noise reduction process using a delay circuit (12) is applied to the above fourth signal (SH3) to obtain a fifth signal (SH4), and the above first signal (SL), third signal (SH2) and fifth signal (SH4) are added, the noise reduction circuit being applicable to apply to a television receiver, etc.
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