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    • 42. 发明申请
    • CONTENT SHARING METHODS AND SYSTEMS
    • 内容共享方法和系统
    • WO2010144610A1
    • 2010-12-16
    • PCT/US2010/038020
    • 2010-06-09
    • DIGIMARC CORPORATIONRODRIGUEZ, Tony, F.
    • RODRIGUEZ, Tony, F.
    • G06K9/00
    • H04W4/16H04M1/0272H04M1/72522H04M1/72544H04M2250/52
    • A first device (such as a cell phone) is equipped with a micro-projector, and used to present imagery on a display surface. A second device (such as a second cell phone) is equipped with a digital camera, and used to capture some of the projected imagery. The captured imagery allows a user of the second device to access digital content of interest from a user of the first device, or from elsewhere. The content may be visual, or of other form (content examples include audio, games, maps, text documents, video, spreadsheets, etc.). In one particular arrangement, the projected imagery is encoded with digital watermark data. Through such arrangements, one user can readily share content, and also engage in collaborative activities - such as cooperative game play, with one or more other users.
    • 第一设备(例如手机)配备有微型投影仪,并用于在显示器表面上呈现图像。 第二设备(例如第二手机)配备有数码相机,并用于捕获一些投影图像。 所捕获的图像允许第二设备的用户从第一设备的用户或其他地方访问感兴趣的数字内容。 内容可以是视觉的,也可以是其他形式(内容示例包括音频,游戏,地图,文本文档,视频,电子表格等)。 在一个特定的布置中,投影图像用数字水印数据编码。 通过这样的安排,一个用户可以容易地共享内容,并且还与一个或多个其他用户进行协作活动,例如合作游戏。
    • 46. 发明申请
    • WATERMARK PAYLOAD ENCRYPTION METHODS AND SYSTEMS
    • WATERMARK PAYLOAD加密方法和系统
    • WO2005091547A2
    • 2005-09-29
    • PCT/US2005/009072
    • 2005-03-18
    • DIGIMARC CORPORATIONSHARMA, Ravi, K.RAMOS, Daniel, O.RODRIGUEZ, Tony, F.LEVY, Kenneth, L.
    • SHARMA, Ravi, K.RAMOS, Daniel, O.RODRIGUEZ, Tony, F.LEVY, Kenneth, L.
    • H04L9/00
    • G06T1/0071G10L19/018H04L9/3236H04L9/3247H04L2209/34H04L2209/608H04N1/32144H04N1/32149H04N2201/3236H04N2201/3281H04N2201/3284
    • The present invention provides a method of securing messages steganographically embedded in media (e.g., printed or electronic objects, audio and video). In one implementation, a message includes a first portion and a second portion. The first portion includes a first message and a first checksum, which are encrypted with a private key. The encrypted first portion is combined with the second portion. The second portion includes a second message and as second checksum. The combined encrypted first portion and the second portion form a signature. The signature is encrypted with a common or universal key, perhaps after error correction coding. The private key is uniquely associated with an entity such as a document issuing jurisdiction. In another implementation, a method appends information to a watermark message received from a remote device. In yet another implementation, a method provides standardized watermark payloads from various input data, regardless of the size of the input data. In another implementation, we encrypt one of two different cooperating watermark payloads, but the encryption and payload data structure help to authenticate both payloads. Another implementation provides a three encryption key pair system for managing messages and watermark embedding. Still another aspect of the invention is a watermark embedding process that uses encryption to whiten, randomize or spread message, instead of convention spread-spectrum modulation.
    • 本发明提供了一种保护隐藏在媒体(例如,印刷或电子对象,音频和视频)中的信息的方法。 在一个实现中,消息包括第一部分和第二部分。 第一部分包括用私钥加密的第一消息和第一校验和。 加密的第一项与第二部分组合。 第二部分包括第二消息和第二校验和。 组合加密的第一部分和第二部分形成签名。 签名在公共密钥或通用密钥之间进行加密,也许在纠错编码之后。 私钥与诸如发布管辖区的文档等实体唯一相关联。