发明名称 |
APPARATUS AND METHOD FOR PREVENTING UNAUTHORIZED COPYING OF VIDEO SIGNALS |
摘要 |
In a digital video tape recorder (VTR) which reproduces digital video and audio signals from a magnetic tape, a copy protect bit in the reproduced digital video signal is detected, and on the basis of the copy protect bit, a code is generated and inserted into the vertical blanking interval of the reproduced video signal. When a video signal (which may be in analog or digital form) having the code in the vertical blanking interval is received in a digital VTR, the code is detected and recording of the video signal and an associated audio signal is inhibited if the code indicates that the received video signal is copy protected.
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申请公布号 |
CA2101200(A1) |
申请公布日期 |
1994.01.25 |
申请号 |
CA19932101200 |
申请日期 |
1993.07.23 |
申请人 |
SONY CORPORATION |
发明人 |
KANOTA, KEIJI;INOUE, HAJIME;KUBOTA, YUKIO |
分类号 |
G06F21/24;G11B15/087;G11B17/28;G11B20/00;G11B20/10;G11B27/031;G11B27/032;G11B27/28;G11B33/12;H04N5/7826;H04N5/91;H04N5/913;H04N5/92;H04N7/083;H04N7/087;H04N7/088;(IPC1-7):G11B3/64 |
主分类号 |
G06F21/24 |
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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