Patent ID: 7966640

Claim:
A method of controlling the display of combined image at a receiver station, said image including the combination of a first image portion and a locally generated image portion, said receiver station including a receiver, an image output device, at least one memory operatively connected to at least one of said receiver and said image output device, and a control signal detector operatively connected to said at least one memory, said method comprising the steps of: storing in said at least one memory, information which is for communicating at least a portion of said combined image; receiving one of a broadcast and a cablecast information transmission, said one of a broadcast and a cablecast information transmission including said first image portion and a first control signal; determining the absence in said at least one memory of complete locally generated image data based on said step of receiving said first control signal, said complete locally generated image data identifying completion of said locally generated image portion, said complete locally generated image data and said locally generated image portion generated by processing data generated locally and stored at said receiver station prior to receiving said first control signal at said receiver station; and clearing at least a portion of said at least one memory based on said step of determining the absence of said complete locally generated image data.