H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/32
H04N 5/44 (2006.01) H04N 5/262 (2006.01)
Patent
CA 1133113
C-1411 ABSTRACT A system for producing television signals for displaying simultaneously a succession of time-separated images of an object moving over a selectable time period in an otherwise static scene which causes the latest image of the moving object to take precedence over the next previous image. The system of the invention provides an improved display over that of a similar system described in Canadian patent application Serial No. 307,167, particularly in situations where there is partial overlap of successive images of the moving object; because the other system gives precedence to the earlier images, the latest image is partially occluded. The improved system includes a reference frame delay, an update frame delay, a comparator, and a pair of multiplexers independently controlled in such a way that update information is not inserted in the reference frame delay during the "action interval", whereby to retain the integrity of the initially stored reference frame. Separate control of the multiplexers allows capture of a reference frame at the start of the "action interval", and precludes information from being written into the reference frame during such interval, and following capture of the reference frame, causes update information resulting from comparisons of the immutable reference frame with selected subsequently arriving frames to be accumulated in the update frame delay. As a result, earlier update information cannot obscure later update information; that is, the latest update information takes precedence over earlier update information.
327538
Cbs Inc.
Gowling Lafleur Henderson Llp
LandOfFree
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