发明名称 |
METHOD AND SYSTEM FOR KEY INSERTION FOR STORED ENCRYPTED CONTENT |
摘要 |
<p>An encrypted content transport stream is received by a viewer's device and recorded for subsequent playback. During recording, keys in headers of packets of the stream are stripped and placed in sequence in a table. Also, the table indicates changes in key indicating bits. When it is desired to play the content, start-of-frame indicator bits such as PUSI and/or RAI bits are used to access the table of keys to retrieve the keys necessary to decrypt the transport stream packets sought to be played.</p> |
申请公布号 |
EP1547300(A4) |
申请公布日期 |
2011.08.03 |
申请号 |
EP20030752416 |
申请日期 |
2003.09.16 |
申请人 |
SONY CORPORATION;SONY ELECTRONICS, INC. |
发明人 |
UNGER, ROBERT, ALLAN |
分类号 |
H04L9/00;G06F21/00;G11B20/00;H04L29/06;H04N5/913;H04N7/167;H04N7/24 |
主分类号 |
H04L9/00 |
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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