Video signal blending apparatus

Details Video signal blending apparatus Video signal blending apparatus

1990-03-12

1991-07-16

Shepperd, John W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 22, H04N 5262

Patent

active

050329170

ABSTRACT:
A first video signal component and a second video signal component represent constituent portions of an image to be displayed. An analog signal blending network blends these components together along a boundary region several pixels wide to reconstitute a video signal representing the image to be displayed. The blending network includes first and second active analog devices which exhibit mutually opposite gain over the boundary region to response to a common gain control signal, to produce a virtually invisible seam along the boundary region.

REFERENCES:
patent: 4395733 (1983-07-01), Elenbaas
patent: 4827344 (1989-05-01), Astle et al.
patent: 4855811 (1989-08-01), Isnardi
patent: 4951144 (1990-08-01), Des Jardins
patent: 4970595 (1990-11-01), Bloomfield
Cavallerano, "Decomposition and Recombination of a Wide Aspect Ratio Image for ENTSC Two-Channel Television", IEEE Transactions on Consumer Electronics, vol. CE-33, No. 3, Aug. 1987, pp. 162-172.
LoCicero, "Edge Stitching of a Wide-Aspect Ratio HDTV Image", IEEE Transactions, 1986, pp. 436-440.
LoCicero, "Image Reconstruction in a Wide Aspect Ratio HDTV System", IEEE Transactions, 1986.

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