Patent ID: 8860883

Claim:
A method for generating a video signature representative of a content of a video signal, the method comprising: receiving pixel data of each of a plurality of given pixels in a first image of the video signal, receiving pixel data of each of the plurality of given pixels in a second image subsequent to the first image, for each given pixel of the plurality of given pixels, comparing corresponding pixel data of the given pixel of the first image with the corresponding pixel data of the given pixel in the second image to provide a corresponding indication of a difference between the pixel data of the given pixel of the first image and the pixel data of the given pixel in the second image; if the difference is greater than a threshold, incrementing a counter; normalizing the indication of the counter by dividing the counter signal by a value proportional to N, wherein N is the number of given pixels; and providing the normalized indication of the counter to thereby generate said video signature.