发明名称 |
STAR PATTERN PARTIAL ENCRYPTION |
摘要 |
A selective encryption encoder consistent with certain embodiments of the invention has a packet identifier that identifies packets of a specified packet type, the specified packet type being defined by packets occurring in a star pattern approximately situated at an upper center of an image which contain intra- coded macroblocks. A packet duplicator duplicates the identified packets to produce first and second sets of the identified packets. The packets are sent to and from a primary encryption encoder to encrypt the first set of identified packets under a first encryption method A secondary encrypter encrypts the second set of identified packets under a second encryption method. |
申请公布号 |
CA2746625(C) |
申请公布日期 |
2014.12.09 |
申请号 |
CA20022746625 |
申请日期 |
2002.12.11 |
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;H04L9/28;H04L12/56;H04L29/06;H04N7/167;H04N21/2389 |
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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