Lockheed Martin Corporation

United States of America As Represented by the Secretary of the Air Force

Unisys Corporation

Samuel A Meddaugh

Raymond C Hedin

Gerald L Brown

Ernest J Torok

David Gordon Hanson

Dennis L Amundson

Kenneth L Graber

Mark Allen Owen

A circuit arrangement and method are disclosed for providing a video signal to a video display from a selectable subset of a plurality of digital video data carried on a plurality of video data channels. The digital video data is generated from video signals from a plurality of video sources, and each video channel selectably carries either color or monochrome video data. A processor is configured and arranged to interpret display commands, and a selector circuit is coupled to the processor. The selector circuit is arranged for connection to the plurality of video data channels and selects digital video data from a subset of the channels responsive to an input selection signal from the processor. A video data sequencer is coupled to the selector circuit and decodes color and monochrome video data from the video channels responsive to configuration signals indicating selected data formats for the channels and merges the selected video data into frames of video data. A digital-to-analog converter generates an analog video signal from the frames of video data.

Multi-mode video processor

A block replicate magnetic bubble memory organization is disclosed in which a number of storage loops are arranged between write and read tracks. Data in the read track is supplied to a deskewing circuit under the control of one section of an EAPROM so that the deskewing circuit outputs one page at a time, where each bit of the page is derived from a different storage loop, to a buffer and error correcting circuit which supplies corrected information to a data processing system as long as only one error bit has occurred on a page. If an error does occur in a page, the processor which has stored in it information relating to all of the used and unused loops of the system, controls another section of the EAPROM so that the defective loop will be exchanged for a good loop after a predetermined number of failures have occurred for the particular bad loop. The write side of the EAPROM is subsequently updated by the processor or remote processor that utilizes the read-out data. Data which is stored in the buffer and has been corrected by the error correcting circuitry is supplied to the skewing circuit under the control of the write side of the EAPROM so it may be written back into the loops of the bubble memory.

Self-healing bubble memories

A beam recombiner is used to parallelize two first order beams emanating from an magneto-optic stripe domain light deflector. One arrangement uses a concave cylindrical mirror with a negative meniscus lens attached thereon to redirect a conjugate beam. The other arrangement uses a concave cylindrical mirror with a cylindrical rod lens placed at the radius of curvature of the mirror to redirect the conjugate beam.

Beam recombination via cylindrical mirror

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Eagan, MN, United States of America

Samuel A Meddaugh