发明名称 |
SLICE MASK AND MOAT PATTERN PARTIAL ENCRYPTION |
摘要 |
A selective encryption encoder consistent with certain embodiments of the invention has vertical and/or horizontal stripes encrypted. In one embodiment, packets are examined in the digital video signal to identify a specified packet type, the specified packet type being both packets carrying intra-coded data representing a pattern of horizontal stripes across an image and packets carrying intra-coded data representing a pattern of vertical stripes across an image. The packets identified as being of the specified packet type are encrypted using a first encryption method to produce first encrypted packets. These first encrypted packets are then used to replace the unencrypted packets in the digital video signal to produce a partially encrypted video signal. The packets of the specified type can also be multiple encrypted and replaced in the data stream to produce a multiple encrypted video data stream.
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申请公布号 |
CA2748412(A1) |
申请公布日期 |
2003.07.02 |
申请号 |
CA20022748412 |
申请日期 |
2002.12.10 |
申请人 |
SONY ELECTRONICS INC. |
发明人 |
CANDELORE, BRANT L.;DEROVANESSIAN, HENRY;PEDLOW, LEO M., JR. |
分类号 |
H04N21/2347;H04K1/00;H04L9/00;H04L9/28;H04N5/783;H04N5/913;H04N7/16;H04N7/167;H04N7/52;H04N9/79 |
主分类号 |
H04N21/2347 |
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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