Invention Grant
US08374491B2 Methods for reading watermarks in unknown data types, and DVD drives with such functionality
有权
用于读取未知数据类型的水印的方法，以及具有这种功能的DVD驱动器
- Patent Title: Methods for reading watermarks in unknown data types, and DVD drives with such functionality
- Patent Title (中): 用于读取未知数据类型的水印的方法，以及具有这种功能的DVD驱动器
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Application No.: US10841970Application Date: 2004-05-06
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Publication No.: US08374491B2Publication Date: 2013-02-12
- Inventor: Geoffrey B. Rhoads
- Applicant: Geoffrey B. Rhoads
- Applicant Address: US OR Beaverton
- Assignee: Digimarc Corporation
- Current Assignee: Digimarc Corporation
- Current Assignee Address: US OR Beaverton
- Main IPC: H04N9/80
- IPC: H04N9/80
Abstract:
To prevent playback of pirated, non-encrypted video, a DVD-based system examines data read from a DVD disk for MPEG-like characteristics. If such attributes are detected, the data is examined for the presence of a video usage-control watermark. The presence of such watermark indicates that the video should be distributed only in encrypted form, so playback of video from the disk is prevented.
Public/Granted literature
- US20050008334A1 Methods for reading watermarks in unknown data types, and DVD drives with such functionality Public/Granted day:2005-01-13
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