Abstract: In a television system, the display by a monitor forms a high resolution window-like frame that is selectively movable about a larger scene which is transmitted as an array of contiguous frames. Separate tracks on a disc-type recorder are used to store a video signal from a camera corresponding to each frame making up the array of contiguous frames in the scene. Either the camera or the scene is repositioned to view each frame in the scene. The video signals are recorded at phase-displaced relations by phase shifting the sweep waveform supplied to the camera while scanning each component of the scene. The replayed video signals corresponding to the array of contiguous frames in the scene are blanked by gates controlled by adjustable delay circuits to select a single frame of unblanked video signal for display by a monitor which corresonds to a portion of the entire scene.

Abstract: Undesirable interference beat patterns in the displayed video signals produced by a magnetic record/reproduce head are substantially eliminated by appropriately changing the amplitude of the writing current to the head in synchronism with the polarity reversal to establish a current ratio which will result in uniform spacing between zero crossovers in the voltage output of the magnetic recording system.

Abstract: Apparatus for transmitting and receiving a plurality of separate pictures or scenes on a single television carrier signal such that a different picture appears in each quadrant of a television receiving tube, and including means for blanking out all but one quadrant and for centering and expanding that quadrant to fill the entire screen of the receiving tube. This is accomplished by separating the sync signals from the video, followed by delaying the sync signals and recombining them with the video such that the video portion, representing one quadrant, is essentially centered between horizontal and vertical sync pulses. Expansion of the single quadrant after it is centered on the tube is achieved by increasing the amplitude of the vertical and horizontal sweep waveforms.