Patent ID: 7650624

Claim:
A method comprising: splitting a first field and a second field of a frame of a video signal into a plurality of segments, a particular segment of the plurality of segments having no overlap with other segments of the plurality of segments and being adjacent to at least one of the plurality of segments; and modulating at least one first field segment of the plurality of segments of the first field and at least one second field segment of the plurality of segments of the second field with auxiliary data by altering the pixel value of the plurality of pixels of the first field segment and the second field segment, wherein at least one second corresponding field segment in the second field that corresponds to the first modulated field segment is not modulated, at least one first corresponding field segment in the first field that corresponds to the second modulated field segment is not modulated, and the plurality of pixels in a corresponding field segment of a field of the frame that correspond to the plurality of pixels in a particular modulated field segment of the other field of the frame have a different pixel value based on the modulating of the first field segment and the second field segment.