Invention Grant
- Patent Title: Conditional access using embedded watermarks
- Patent Title (中): 使用嵌入水印进行条件访问
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Application No.: US13324421Application Date: 2011-12-13
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Publication No.: US09323902B2Publication Date: 2016-04-26
- Inventor: Rade Petrovic , Jian Zhao , Joseph M. Winograd
- Applicant: Rade Petrovic , Jian Zhao , Joseph M. Winograd
- Applicant Address: US CA San Diego
- Assignee: Verance Corporation
- Current Assignee: Verance Corporation
- Current Assignee Address: US CA San Diego
- Agency: Perkins Coie LLP
- Agent Donald L. Wenskay
- Main IPC: H04L9/32
- IPC: H04L9/32 ; G06F21/10 ; H04N1/00 ; H04N1/32

Abstract:
Methods, devices and computer program products facilitate conditional access to a content embedded with watermarks. For such a content, when copy control rules associated with an embedded watermark message prohibits unconditional access to the content, it is determined whether or not an exception to the copy control rules exists, and if an exception to the copy control rules exists, the content is conditionally accessed. Additional watermark messages can be extracted while the content is being conditionally accessed, and based on the additionally extracted watermark messages, it is verified that conditional access to the content has been fulfilled.
Public/Granted literature
- US20130151856A1 CONDITIONAL ACCESS USING EMBEDDED WATERMARKS Public/Granted day:2013-06-13
Information query