Interfield image motion detector for video signals
First Claim
1. A motion detector for detecting image motion in a video signal from sampled data signals representing differences between pixels separated by substantially integral numbers of field intervals, comprising:
- a source of said sampled data signals representing pixel differences;
means coupled to said source for concurrently providing a plurality of said sampled data signals corresponding to an array of pixel differences disposed about and including a pixel difference under examination for image motion;
detection means coupled to said means for providing a plurality of sample data signals, for examining subarrays of said sampled data signals, each subarray including the sampled data signal corresponding to the pixel difference under examination and at least one sample data signal exclusive of the other subarrays, and providing a motion signal if all of the sampled data signals in any one of the subarrays exhibit a like predetermined characteristic.
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Accused Products
Abstract
A motion detector for determining image motion in a video signal develops an array of signals representing the difference between pixels from adjacent frames. The array of signals are grouped into subarrays, each of which include the signal corresponding to the pixel under examination for motion. Each of the subarrays are independently examined to determine if the magnitude of all of the pixel differences represented in a particular subarray exceed a predetermined threshold and/or the pixel differences have like polarity. If these conditions are met in any one of the subarrays, a motion signal is produced.
131 Citations
12 Claims
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1. A motion detector for detecting image motion in a video signal from sampled data signals representing differences between pixels separated by substantially integral numbers of field intervals, comprising:
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a source of said sampled data signals representing pixel differences; means coupled to said source for concurrently providing a plurality of said sampled data signals corresponding to an array of pixel differences disposed about and including a pixel difference under examination for image motion; detection means coupled to said means for providing a plurality of sample data signals, for examining subarrays of said sampled data signals, each subarray including the sampled data signal corresponding to the pixel difference under examination and at least one sample data signal exclusive of the other subarrays, and providing a motion signal if all of the sampled data signals in any one of the subarrays exhibit a like predetermined characteristic. - View Dependent Claims (2, 3, 4, 5)
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6. A motion detector for detecting image motion in a video signal from sampled data signals representing differences between pixels separated by substantially integral numbers of field intervals, comprising:
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a source of said sampled data signal representing pixel differences; means including means coupled to said source and having a plurality of output ports for providing a plurality of said sampled data signals, said plurality of signals corresponding to an array of pixels disposed about and including a pixel under examination for image motion; a plurality of detection means each having a plurality of input terminals less in number than said plurality of output ports, and coupled to said plurality of output ports so that signals coupled to each of said detection means correspond to a subarray, including said pixel under examination, of said array of pixels, for producing an output signal having a first state when all of the signals in said subarray have a like property and a second state otherwise; and means coupled to said plurality of detection means for producing a motion signal whenever any one of said detection means produces an output signal in said first state. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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Specification