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2-127291 | May 1990 | JPX |
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4355333 | Sato | Oct 1982 | |
4843457 | Yamagata | Jun 1989 | |
5019895 | Yamamoto et al. | May 1991 | |
5051818 | Mishima | Sep 1991 |
Entry |
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Takahashi, "Noise Reducer", The Journal of the Institute of Television Egineers of Japan, vol. 33, No. 4, pp. 296-300, 1979. |