发明名称 |
Circuit for detecting a drop-out of a frequency modulated video signal |
摘要 |
A drop-out detecting circuit forms a drop-out detecting signal on the basis of the result of comparing the frequency of a frequency modulated video signal reproduced from a slant track on a magnetic tape with a reference frequency. The level of a reproduction state detecting signal formed on the basis of the envelope of the reproduced frequency modulated video signal is compared with a predetermined level and the above reference frequency is varied on the basis of the compared result.
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申请公布号 |
US5050002(A) |
申请公布日期 |
1991.09.17 |
申请号 |
US19900511983 |
申请日期 |
1990.04.13 |
申请人 |
SONY CORPORATION |
发明人 |
SUZUKI, HIDETO;YOSHIDA, TERUYUKI;ARAI, HIDEKI |
分类号 |
H04N5/94 |
主分类号 |
H04N5/94 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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