Interactive computer-based information display system
Patent 4599611 Issued on July 8, 1986. Estimated Expiration Date: 
July 8, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
July 8, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References Re30785 3757037 3849773 3891792 3900887 Data display systems Television camera arrangement in which electrically generated data is superimposed on the video picture information Pictorial information retrieval system Time registration arrangement provided with a television camera Apparatus for reproducing multiplex video data InventorsAssigneeApplicationNo. 06/384409 filed on 06/02/1982US Classes:345/636, Character and graphics348/552, COMBINED WITH DIVERSE ART DEVICE (E.G., COMPUTER, TELEPHONE)348/589Including insertion of characters or graphics (e.g., titles)ExaminersPrimary: Curtis, Marshall M.Attorney, Agent or FirmInternational ClassesG09B 5/00 (20060101)G09G 5/36 (20060101) G09B 5/06 (20060101) G09G 5/39 (20060101) G09G 5/02 (20060101) G06F 3/153 (20060101) AbstractAn interactive, computer-based system for combining on a common display, as overlaid images, video signals from a source of video images (such as a video disc) with graphics and text from a computer, particularly for use in computer-aided instruction, computer-based information retrieval and visual annotation or supplementation of video images. The video signals are converted to RGB format (or some other non-phase-modulated format) if not already so encoded. They are then supplied to a switch which receives the text and graphic-signals, also in RGB format, as another input. The output of the switch is supplied to a video display. The switch is controlled by an attribute of the text and graphics signals, for controlling the selection of the video source on a pixel-by-pixel basis. A keyboard or other device connected to the computer allows the user to provide input and, responsive thereto, the computer directs the operation of the video source, such as changing frames on a video disc, providing image enhancement or masking, etc.Other References
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