利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

10 条记录 (耗时 0.016 秒)

    SYSTEMS AND METHODS FOR AUTHENTICATION OF PRINT MEDIA
    3.
    发明公开
    SYSTEMS AND METHODS FOR AUTHENTICATION OF PRINT MEDIA 有权
    VTEFAHREN ZUR AUTHENTIFIKATION VON DRUCKMEDIEN

    公开(公告)号：EP1579622A4

    公开(公告)日：2007-05-30

    申请号：EP03790079

    申请日：2003-11-26

    申请人： DIGIMARC CORP

    发明人： RODRIGUEZ TONY F ,  REED ALASTAIR M ,  SHARMA RAVI K ,  ALATTAR OSAMA M ,  HANNIGAN BRETT T ,  LEVY KENNETH L ,  BRUNK HUGH L

    IPC分类号： H04N1/00 ,  H04N1/32 ,  H04L9/00 ,  G06F11/30

    CPC分类号： H04N1/00846 ,  H04N1/00002 ,  H04N1/00005 ,  H04N1/00037

    摘要： This disclosure describes methods for using embedded auxiliary signals in documents for copy detection and other applications. In an application, the auxiliary signal is formed as an array of elements selected from a set of print structures (106) with properties that change differently in response to copy operations. These changes in properties of the print structures that carry the embedded auxiliary signal are automatically detectable. The extent to which the auxiliary data is detected forms a detection metric used in combination with one or more other metrics to differentiate copies from originals. Robust and fragile watermarks are used in Image Replacement Documents for a variety of applications. Digital watermarks act as on-board mediators in authentication of a variety of printed documents. Finally, digital watermarks are used to help manage quality of the scanners used in imaging systems.

    摘要翻译： 本公开描述了在用于复制检测和其他应用的文档中使用嵌入式辅助信号的方法。 在应用中，辅助信号被形成为从一组打印结构（106）中选择的元素的阵列，其具有响应于复制操作而改变的属性。 携带嵌入式辅助信号的打印结构的属性的这些变化是可以自动检测的。 检测辅助数据的程度形成与一个或多个其他度量结合使用的检测度量，以区分副本与原件。 图像替换文档中使用了强大而脆弱的水印，用于各种应用。 数字水印作为各种印刷文件认证中的板载介质。 最后，数字水印用于帮助管理成像系统中使用的扫描仪的质量。

    TRANSMARKING, WATERMARK EMBEDDING FUNCTIONS AS RENDERING COMMANDS, AND FEATURE-BASED WATERMARKING OF MULTIMEDIA SIGNALS
    9.
    发明公开
    TRANSMARKING, WATERMARK EMBEDDING FUNCTIONS AS RENDERING COMMANDS, AND FEATURE-BASED WATERMARKING OF MULTIMEDIA SIGNALS 审中-公开
    TRANS MARK水印嵌入特征回放命令和多媒体信号特征的水性标记的制造

    公开(公告)号：EP1266475A4

    公开(公告)日：2005-07-27

    申请号：EP01920399

    申请日：2001-03-16

    申请人： DIGIMARC CORP

    发明人： LEVY KENNETH L ,  DECKER STEPHEN K

    IPC分类号： G06T1/00 ,  H04N1/32 ,  H04N1/387 ,  H04N7/08 ,  H04N7/081 ,  H04K1/00

    CPC分类号： G06T1/0064 ,  G06T1/0028 ,  H04N1/32144 ,  H04N1/32229 ,  H04N1/32299 ,  H04N2201/3233 ,  H04N2201/327

    摘要： A watermarked media signal (20) is transmarked to adapt the watermark to the robustness and perceptibility constraints of the new environment (34). A first watermark is detected (22) in the media signal and the message information from the first watermark is embedded into a second watermark (44), before the media signal undergoes a transformation process. The second watermark (44) is adapted to survive the transformation process. In addition, a watermark embedding command is included in a set of rendering commands used during the process of creating a media object to specify how the media object is to be rendered. The watermark embedding command includes an identifier used to link to customer or related content information, the customer's web site, the intensity at which to embed the watermark, areas not to embed, batch processing options, printing preferences for images, watermark embedding methods to use on different media types, formats or different parts of the media object, and desired rendering quality.

    SIGNAL PROCESSING METHODS, DEVICES, AND APPLICATIONS FOR DIGITAL RIGHTS MANAGEMENT
    10.
    发明公开
    SIGNAL PROCESSING METHODS, DEVICES, AND APPLICATIONS FOR DIGITAL RIGHTS MANAGEMENT 审中-公开
    方法进行信号处理，设备和数字版权管理FOR应用

    公开(公告)号：EP1157499A4

    公开(公告)日：2003-07-09

    申请号：EP00916232

    申请日：2000-03-10

    申请人： DIGIMARC CORP ,  ACOUSTIC INFORMATION PROC LAB

    发明人： LEVY KENNETH L

    IPC分类号： G06T1/00 ,  G09C5/00 ,  G10K15/02 ,  G10L11/00 ,  H04N1/32 ,  H04N1/387 ,  H04N7/08 ,  H04N7/081 ,  H04N7/24 ,  G11B20/00 ,  H04N7/26

    CPC分类号： G06T1/0021 ,  H04N1/32203 ,  H04N1/32208 ,  H04N1/32229 ,  H04N1/32272 ,  H04N2201/3233 ,  H04N2201/327 ,  H04N2201/3281

    摘要： Techniques are detailed for steganographically embedding auxiliary data (1030) within electronic content (e.g., audio, video, still imagery, etc.) (1020) in manners that are computationally simple, yet highly inconspicuous (1010). The embedded data can convey copyright or other ownership information, or may be used for device control purposes (e.g., preventing unauthorized reproduction). A number of countermeasures against removal of the auxiliary data are contemplated, including keying use of the content to the presence of such data. The embedded data may be made dependent on the media encoded, e.g., by modifying the embedded data in accordance with characteristics from the media. Encryption can also advantageously be employed (1040). Playback devices may be equipped to track IDs from previously-accessed content, and enforce usage rules. Some embodiments employ multiple watermarks to advantage, e.g., a robust watermark is encoded prior to distribution and indicates the content is protected, and a second watermark is encoded by the playback device and serves to uniquely link that content to that device. Some applications benefit from scrambling of content, in a manner that leaves certain information (e.g., from a header) unscrambled and freely accessible.