发明名称 |
Copy prevention method and apparatus for digital video system |
摘要 |
A copy prevention method and apparatus for a digital video system is disclosed including the steps of: (a) adding a header area of a header start code and key field to a reproduced bit stream: (b) decrypting and transmitting the bit stream to which the header area is added: (c) detecting a key field of the decrypted and transmitted bit stream and detecting copy prevention information; and (d) encrypting the bit stream according to information detected from stop (c) and recording it an tape. |
申请公布号 |
USRE42951(E1) |
申请公布日期 |
2011.11.22 |
申请号 |
US20040981797 |
申请日期 |
2004.11.05 |
申请人 |
PARK TAE JOON;LG ELECTRONICS INC. |
发明人 |
PARK TAE JOON |
分类号 |
A47L9/26;H04L9/00;G06F21/00;G09C1/00;G11B20/10;G11B20/12;H04L9/32;H04N5/91;H04N5/913;H04N5/92 |
主分类号 |
A47L9/26 |
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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