Video signal processing systems
First Claim
Patent Images
1. A video signal processing system for combining a plurality of images comprising:
- a plurality of sources each of which provides video signals representing a respective image and priority signals for the respective image;
a series of selector stages connected to each other and to the sources such that each selector stage in the series;
(i) receives as its inputs said video signals and priority signals from a respective one of said sources and video signals and priority signals from a preceding selector stage, if any, in the series, and(ii) selects from among said inputs selected video signals and priority signals on the basis of the priority signals received as said inputs, and provides as its outputs the selected video signals and priority signals, and transmits said outputs to a next selector stage, if any, in the series; and
means for combining the selected video signals provided as said outputs by the last selector stage in the series to produce output video signals, and wherein each said selector stage comprises means for selecting from among said inputs and for providing as its first and second outputs, the video signals which have the highest and the second highest priority signals but not video signals which have lower priority signals.
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Abstract
A video signal processing system in which a number of video image signals are combined to provide an output which is such that where several objects of the input images overlay so they appear to be at different distances. Each input video signal is provided with a priority signal and a series of contests are held within the processor so that the final image consists of the two video signals with the highest priority. A key signal is provided for the video signal with the highest priority.
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Citations
13 Claims
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1. A video signal processing system for combining a plurality of images comprising:
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a plurality of sources each of which provides video signals representing a respective image and priority signals for the respective image; a series of selector stages connected to each other and to the sources such that each selector stage in the series; (i) receives as its inputs said video signals and priority signals from a respective one of said sources and video signals and priority signals from a preceding selector stage, if any, in the series, and (ii) selects from among said inputs selected video signals and priority signals on the basis of the priority signals received as said inputs, and provides as its outputs the selected video signals and priority signals, and transmits said outputs to a next selector stage, if any, in the series; and means for combining the selected video signals provided as said outputs by the last selector stage in the series to produce output video signals, and wherein each said selector stage comprises means for selecting from among said inputs and for providing as its first and second outputs, the video signals which have the highest and the second highest priority signals but not video signals which have lower priority signals. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of video signal processing for combining a plurality of video images comprising the steps of:
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providing a sequence of digital video signals and associated priority signals relating to respective images; selecting digital video signals representing two or more iamges at one selector stage and transmitting the selected digital video signals to a further selector stage, said selection being dependent upon the priority signals associated with said respective images; and combining said selected digital video signals transmitted to a last selector stage to produce a sequence of output video signals.
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8. A system comprising:
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video sources providing respective video signals representing respective images and priority signals for said images; selector stages arranged in a series in which each selector stage receives as its inputs (i) video signals and priority signals provided by a respective video source and (ii) video signals and priority signals provided as outputs of a preceding selector stage, if any, in the series, and provides as its outputs a subset of more than one of said inputs, selected on the basis of the priority signals received as said inputs; and a network for combining the video signals provided as outputs by the last selector stage in the series to thereby produce video signals representing a combined image. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification