Patent ID: 8199969
Filing Date: 2012-06-12
Classification: G06T,H04B,H04N

Abstract:
1. A method comprising: receiving a color video signal comprising a first frame and a second frame; transforming the first frame by separating the first frame into at least first data representing a first color channel of the first frame and second data representing a second color channel of the first frame, in which the first data representing a first color channel of the first frame comprises a digital watermark signal embedded therein with a first signal polarity and the second data representing a second color channel of the first frame comprises the digital watermark signal embedded therein with a second signal polarity that is inversely related to the first signal polarity of the digital watermark signal in the first data; transforming the second frame by separating the second frame into at least third data representing a first color channel of the second frame and fourth data representing a second color channel of the second frame, in which the third data representing a first color channel of the second frame comprises the digital watermark signal embedded therein with the second signal polarity and the fourth data representing a second color channel of the second frame comprises the digital watermark signal embedded therein with the first signal polarity; subtracting the third data from the first data to yield first subtracted data; subtracting the fourth data from the second data to yield second subtracted data; subtracting the second subtracted data from the first subtracted data to yield third subtract data; using one or more programmed electronic processors, analyzing the third subtracted data to detect the digital watermark signal; and once detected, providing information associated with the digital watermark signal.