公开(公告)号：WO0054453A9

公开(公告)日：2002-07-04

申请号：PCT/US0006296

申请日：2000-03-10

Applicant: DIGIMARC CORP ,  LEVY KENNETH L ,  ACOUSTIC INFORMATION PROC LAB

Inventor： LEVY KENNETH L

IPC: G06T1/00 ,  G09C5/00 ,  G10K15/02 ,  G10L11/00 ,  H04N1/32 ,  H04N1/387 ,  H04N7/08 ,  H04N7/081 ,  H04L9/00

CPC classification number: G06T1/0021 ,  H04N1/32203 ,  H04N1/32208 ,  H04N1/32229 ,  H04N1/32272 ,  H04N2201/3233 ,  H04N2201/327 ,  H04N2201/3281

Abstract: 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.

Abstract translation: 技术详细描述了在电子内容（例如，音频，视频，静止图像等）（1020）中隐藏地嵌入辅助数据（1030），其方式是计算上简单但高度不显眼的（1010）。 嵌入的数据可以传达版权或其他所有权信息，或者可以用于设备控制目的（例如，防止未经授权的再现）。 考虑了一些对除去辅助数据的对策，包括使用该内容来存在这样的数据。 嵌入数据可以取决于编码的媒体，例如通过根据来自媒体的特征修改嵌入数据。 也可以有利地采用加密（1040）。 播放设备可以配备来跟踪先前访问的内容的ID，并且强制使用规则。 一些实施例有利地使用多个水印，例如，鲁棒水印在分发之前被编码，并且指示内容被保护，并且第二水印由回放设备编码，并用于将该内容唯一地链接到该设备。 一些应用程序受益于内容的加扰，以某种方式使某些信息（例如，从标题）解扰并可自由访问。