公开(公告)号：US07260220B2

公开(公告)日：2007-08-21

申请号：US10532911

申请日：2003-09-22

申请人： Frits Anthony Steenhof ,  Gerrit Cornelis Langelaar

发明人： Frits Anthony Steenhof ,  Gerrit Cornelis Langelaar

IPC分类号： H04N7/167

CPC分类号： H04N21/23892 ,  G06T1/0035 ,  H04N21/8358

摘要： A method and apparatus (200) for embedding a watermark in an information signal bit-stream are described. The method comprises receiving a portion of an information signal bit-stream (MPEG2). A first copy of the received portion is stored in a first buffer (220). A second copy of the received portion is watermarked, and the resulting watermarked signal stored in a second buffer (240). At predetermined intervals, a check is performed to determine if the bit-rate of the received portion has been changed by being watermarked. If the check determines the bit-rate has changed, the first copy of the received portion from the first buffer is output. Otherwise the watermarked signal from the second buffer is output.

摘要翻译： 描述了一种用于在信息信号比特流中嵌入水印的方法和装置（200）。 该方法包括接收信息信号比特流（MPEG2）的一部分。 接收部分的第一副本被存储在第一缓冲器（220）中。 所接收部分的第二副本被加水印，并且所生成的水印信号存储在第二缓冲器（240）中。 以预定间隔，执行检查以确定接收部分的比特率是否已经通过加水印而改变。 如果检查确定比特率已经改变，则输出来自第一缓冲器的接收部分的第一副本。 否则输出来自第二缓冲器的水印信号。

公开(公告)号：US07124298B2

公开(公告)日：2006-10-17

申请号：US10167180

申请日：2002-06-11

申请人： Jan Johannes Petrus Maria Beekmans ,  Frits Anthony Steenhof

发明人： Jan Johannes Petrus Maria Beekmans ,  Frits Anthony Steenhof

IPC分类号： G06F1/26

CPC分类号： G06T1/005 ,  G06T2201/0065 ,  H04N19/467 ,  H04N21/23892 ,  H04N21/8358

摘要： Method of and system for detecting a watermark in MPEG-2 encoded video data during high-speed copying of the video data. A bus spy (120) selects independently coded frames, such as I-frames, from the video data and feeds the selected frames to a watermark detector (130) for detecting a watermark therein. By only supplying some of the frames to the watermark detector (130), the average input data rate for the watermark detector (130) is much lower than the data rate during the high-speed copying. Various embodiments present various ways to efficiently supply the contents of the selected frames to the watermark detector (130).

摘要翻译： 在视频数据的高速复制期间，用于检测MPEG-2编码视频数据中的水印的方法和系统。 总线间谍（120）从视频数据中选择诸如I帧的独立编码帧，并将所选择的帧馈送到用于检测其中的水印的水印检测器（130）。 通过仅向水印检测器（130）提供一些帧，水印检测器（130）的平均输入数据速率远低于高速复制期间的数据速率。 各种实施例呈现了将所选择的帧的内容有效地提供给水印检测器（130）的各种方式。