发明名称 |
Method and apparatus for maintaining secure and nonsecure data in a shared memory system |
摘要 |
A graphics processor receives a compressed encrypted video stream. The graphics processor decrypts the compressed encrypted video stream and stores a decrypted version (i.e., a decrypted compressed video stream) in a protected portion of an on-chip or off-chip video memory. The graphics processor then permits processors and other bus masters on the graphics processor to access the on-chip video memory, but conditionally limits access to other bus masters that are located off-chip, such as a central processing unit located off-chip and coupled to the graphics processor via a bus.
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申请公布号 |
US7788505(B2) |
申请公布日期 |
2010.08.31 |
申请号 |
US20050300542 |
申请日期 |
2005.12.14 |
申请人 |
ATI TECHNOLOGIES ULC |
发明人 |
PORTER ALLEN J. C.;WANG CHUN;KECHICHIAN KEVORK;VARGA GABRIEL;STRASSER DAVID |
分类号 |
G06F11/30;G06F12/14;G09G5/36;G09G5/39;H04N5/44 |
主分类号 |
G06F11/30 |
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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