发明名称 |
Generational copy control of a video signal |
摘要 |
Method and apparatus for providing generational copy control of a video signal. A digital video signal contains content information, first supplemental information and second supplemental information. The first supplemental information is represented by a watermark pattern, the second by a control pattern. Copying of the content information is only permitted if a predetermined combination of the first and second supplemental information is present. Pseudo-sync pulses are added to a blanking interval of an analog video signal converted from a digital video signal, the pulses representing the second supplemental information.
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申请公布号 |
US6701062(B1) |
申请公布日期 |
2004.03.02 |
申请号 |
US19990327996 |
申请日期 |
1999.06.08 |
申请人 |
MACROVISION CORPORATION |
发明人 |
TALSTRA JOHAN CORNELIS;HOLLAR MARK;KUROWSKI KORDIAN;COLLIER DAVID;WROBLESKI WILLIAM;HOLZGRAFE JAMES;KALKER ANTONIUS ADRIANUS CORNELIS MARIA;NELSON DEREK;CAPITANT PATRICE;RYAN JOHN O. |
分类号 |
G06T1/00;H04N5/913;(IPC1-7):H04N5/91 |
主分类号 |
G06T1/00 |
代理机构 |
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代理人 |
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地址 |
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