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。