Patent ID: 7779361

Claim:
A method comprising: receiving, by a computer system, a plurality of display signals from a plurality of electrical devices, the plurality of display signals comprising two display signals physically disparate in form sufficiently to be incompatible with one another, at least one display signal of the plurality of display signals communicating a plurality of sequential screen images; translating, by the computer system, one or both of the two display signals into a common form such that the two display signals are compatible with one another; generating, by the computer system after the translating, a composite display signal defining a plurality of windows, wherein each display signal of the plurality of display signals corresponds to at least one window of the plurality of windows; transmitting, by the computer system, the composite display signal to at least one display; comparing, by the computer system, a first screen image of the plurality of sequential screen images with a second screen image of the plurality of sequential screen images, the second screen image being subsequent in time to the first screen image; determining, by the computer system, whether a number of contiguous pixels that change color between the second screen image and the first screen image exceeds a threshold; and initiating, by the computer system, an alarm when it is determined that the number of contiguous pixels that change color between the second screen image and the first screen image exceeds the threshold.