发明名称 |
RECORDED RECORDING MEDIUM AND ITS PRODUCTION |
摘要 |
PURPOSE:To prevent dubbing by substituting the vertical synchronizing pulses in video signals with the false vertical synchronizing signals which are of not square waveform and whose integrating value is smaller than the integrating value of the vaertical synchronizing pulses. |
申请公布号 |
JPS52121306(A) |
申请公布日期 |
1977.10.12 |
申请号 |
JP19760038634 |
申请日期 |
1976.04.06 |
申请人 |
SONY CORP |
发明人 |
YONEYAMA SHIGEYUKI |
分类号 |
G11B20/02;G11B5/027;H04N5/91;H04N5/913 |
主分类号 |
G11B20/02 |
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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