发明授权
- 专利标题： Data recording apparatus and method for preventing illegal copying
- 专利标题（中）： 用于防止非法复制的数据记录装置和方法
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申请号： US697794申请日： 1996-08-30
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公开(公告)号： US5991499A公开(公告)日： 1999-11-23
- 发明人: Yoichi Yagasaki , Hideki Koyanagi , Katsumi Tahara , Yasushi Fujinami
- 申请人： Yoichi Yagasaki , Hideki Koyanagi , Katsumi Tahara , Yasushi Fujinami
- 申请人地址： JPX Tokyo
- 专利权人： Sony Corporation
- 当前专利权人： Sony Corporation
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX7-225039 19950901
- 主分类号： H04N5/913
- IPC分类号： H04N5/913 ; H04N7/50 ; H04N5/91
摘要：
Unauthorized copying of a digital video program is prevented by designating a first block and a second block of data in a bit stream encoded by a fixed length code. A portion of the first block is selected as key data and inserted into the second block to indicate that the digital video program is a copy and to prevent illegal copying.
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