公开(公告)号：US20030202660A1

公开(公告)日：2003-10-30

申请号：US10419495

申请日：2003-04-21

Applicant: THE BOEING COMPANY

Inventor： Wengsheng Zhou ,  Phoom Sagetong

IPC: H04N007/167

CPC classification number: H04N21/8358 ,  H04N7/1675

Abstract: A dynamic wavelet feature-based watermark for use with digital video. Scene change detection separates digital data into one or more scenes, wherein each of the scenes is comprised of one or more frames. A temporal wavelet transformation decomposes the frames of each scene into dynamic frames and static frames. The static frames of each scene are subjected to a spatial wavelet transformation, so that the watermark can be cast into middle frequency sub-bands resulting therefrom. Polyphase-based feature selection or local block-based feature selection is used to select one or more features. The watermark is cast into the selected features by means of either (1) a comparison of energy in polyphase transform components of the selected feature, or (2) a change in value of blocked wavelet coefficients of the selected feature.

Abstract translation: 一种用于数字视频的基于动态小波特征的水印。 场景变化检测将数字数据分离为一个或多个场景，其中每个场景由一个或多个帧组成。 时间小波变换将每个场景的帧分解为动态帧和静态帧。 对每个场景的静态帧进行空间小波变换，从而将水印投射到由此产生的中频子带中。 基于多相特征选择或基于区域的特征选择用于选择一个或多个特征。 通过（1）所选特征的多相变换分量中的能量比较，或（2）所选特征的阻塞小波系数的值的变化，将水印投射到所选择的特征中。

公开(公告)号：US20030204729A1

公开(公告)日：2003-10-30

申请号：US10419489

申请日：2003-04-21

Applicant: THE BOEING COMPANY

Inventor： Troy Rockwood ,  Wengsheng Zhou

IPC: H04L009/00

CPC classification number: H04H20/31 ,  G06F21/10 ,  G06F21/16 ,  H04L9/0822 ,  H04L9/3247 ,  H04L2209/608 ,  H04N1/32144 ,  H04N21/8358 ,  H04N2201/323 ,  H04N2201/3233 ,  H04N2201/3235 ,  H04N2201/3281

Abstract: A system for creating non-repudiation (undeniable) watermarks, wherein a content provider uses outside distribution entities to distribute media content supplied by the content provider. Content watermarked by a distribution entity using this system is undeniably recognizable by the content provider as originating with that particular distribution entity. In other words, given N distribution entities, the content provider is able to tell which particular distribution entity watermarked the media content. The system does not allow any distribution entity to watermark media content so that would appear to have been watermarked by another distribution entity and the system does also not allow the content provider to watermark media content so that would appear to have been watermarked by a particular distribution entity. Consequently, this allows the content provider to place a high degree of trust in the identification of the distribution entity by means of the watermark.