Multiple image video display system
First Claim
Patent Images
1. In a multiple image video display system, having a plurality of video images displayed and a single composite image, wherein each video image originates from a separate corresponding incoming video signal and is substantially simultaneously displayed in a separate non-overlapping section of said single composite image, the improvement comprising:
- means for repetitively selecting a successive one of a plurality of incoming video signals and writing at least one pixel value from said selected incoming video signal into a frame store memory during one of a plurality of succesive memory write operations involving said frame store memory;
means for repetitively selecting at least one successive pixel value stored in said frame store memory and reading said selected successive pixel value from said frame store memory during read operation interleaved between two successive ones of said memory write operations; and
the frame store memory, responsive to said repetitive selecting and writing means, and to said repetitive selecting and reading means, for storing values of pixels comprising said composite image and for repetitively performing a memory read operation interleaved between two successive ones of said memory write operations whereby said frame store memory operates at a sufficiently high data transfer rate to permit each of said video images to be substantially simultaneously displayed in a corresponding non-overlapping portion of the composite image.
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Abstract
An image processing system, which receives asynchronous analog video output signals from a plurality of independently operating video cameras (preferably four) and simultaneously displays the image obtained from each camera, dimensionally reduced by a factor of two, on a non-overlapping basis on one video monitor, is described.
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Citations
27 Claims
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1. In a multiple image video display system, having a plurality of video images displayed and a single composite image, wherein each video image originates from a separate corresponding incoming video signal and is substantially simultaneously displayed in a separate non-overlapping section of said single composite image, the improvement comprising:
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means for repetitively selecting a successive one of a plurality of incoming video signals and writing at least one pixel value from said selected incoming video signal into a frame store memory during one of a plurality of succesive memory write operations involving said frame store memory; means for repetitively selecting at least one successive pixel value stored in said frame store memory and reading said selected successive pixel value from said frame store memory during read operation interleaved between two successive ones of said memory write operations; and the frame store memory, responsive to said repetitive selecting and writing means, and to said repetitive selecting and reading means, for storing values of pixels comprising said composite image and for repetitively performing a memory read operation interleaved between two successive ones of said memory write operations whereby said frame store memory operates at a sufficiently high data transfer rate to permit each of said video images to be substantially simultaneously displayed in a corresponding non-overlapping portion of the composite image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. In a method for use in a multiple image video display system having a plurality of video images displayed as a single composite image wherein each video image originates from a separate corresponding incoming video signal and each of said video images is stored in a frame store memory and thereafter substantially simultaneously displayed in a separate non-overlapping section of said single composite image, the improvement comprising the steps of:
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repetitively selecting a successive one of a plurality of incoming video signals and writing at least one pixel value from said selected incoming video signal into the frame store memory during one of a plurality of successive memory write operations, and repetitively selecting at least one successive pixel value stored in said frame store memory and reading said selected successive pixel value from said frame store memory during each memory read operation interleaved between two successive ones of said memory write operations, whereby said frame store memory operates at a sufficiently high data transfer rate to permit each of said video images to be substantially simultaneously displayed in corresponding non-overlapped portions of the composite image. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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Specification