发明授权
- 专利标题: Methods and apparatus for digital content protection
- 专利标题(中): 数字内容保护的方法和装置
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申请号: US10453407申请日: 2003-06-03
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公开(公告)号: US07006630B2公开(公告)日: 2006-02-28
- 发明人: Hong Heather Yu , Prabir Bhattacharya
- 申请人: Hong Heather Yu , Prabir Bhattacharya
- 申请人地址: JP Osaka
- 专利权人: Matsushita Electric Industrial Co., Ltd.
- 当前专利权人: Matsushita Electric Industrial Co., Ltd.
- 当前专利权人地址: JP Osaka
- 代理机构: Harness, Dickey & Pierce, PLC
- 主分类号: H04N7/167
- IPC分类号: H04N7/167
摘要:
A multilayer digital content protection system, particularly for a digital cinema application is provided. Detection of unauthorized activity at the time it is occurring is provided using a first protection layer. Two layers of imperceptible watermarks, one camcorder viewable and one camcorder invisible are inserted into unauthorized copies of the digital content with second and third protection layers. Strong near infrared is also used to degrade the quality of any attempted unauthorized recording of digital content using a camcorder.
公开/授权文献
- US20040247120A1 Methods and apparatus for digital content protection 公开/授权日:2004-12-09
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