Encryption method of video stream based on H.264 coding standard with controllable quality |
Title： |
| Encryption method of video stream based on H.264 coding standard with controllable quality |
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Application Number： |
200610062937 |
Application Date： |
2006/09/29 |
Announcement Date： |
2007/07/11 |
Pub. Date： |
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Publication Number： |
1997159 |
Announcement Number： |
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Grant Date： |
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Granted Pub. Date： |
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ApplicationType： |
Invention |
State/Country： |
94[China|shenzhen] |
IPC： |
H04N 7/32, H04N 7/50, H04N 7/26, H04N 7/16 |
Applicant(s)： |
Graduate School at Shenzhen, Tsinghua University |
Inventor(s)： |
Yuan Chun, Hong Guangming, Zhong Yuzhuo |
Key Words： |
H.264 coding standard, controllable quality, video stream, encryption |
Abstract： |
This invention relates to one visual frequency flow coding method based on H. 264 codes standard, which comprises the following steps: system adopts coding formula to code the frame blocks for ruled sizes in the flow; user designs coding degree to select coding class according to the wide band status. This invention method can code different degrees of visual flow to ensure right user to get visual frequency content to conceal total visual frequency content. |
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| Last Update |
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2008-4-17 |
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Selected patents owned by Tsinghua University filed in 2005 are loaded. |
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2008-3-31 |
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Selected patents owned by Tsinghua University filed in 2006 and 2007 are load. |
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