Apparatus for combining a video signal with graphics and text fr

Facsimile and static presentation processing – Static presentation processing – Attribute control

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

358310, H04N 9535

Patent

active

044980981

ABSTRACT:
Apparatus for combining video signals from a video source, such as a video disc player, with computer-generated graphics/text output on a single display, for overlaying the two. The computer-generated video is provided in RGB format; the other video is converted to RGB format if not already in that form and the two sets of RGB signals are provided to a switch. The switch (i.e., multiplexer) selects which one of the two RGB signal sets to display; this selection is made separately for each pixel. In one embodiment, the color of the computer-generated signals controls the switch's selection of source. A master-slave synchronization system maintains registration between the two sets of RGB signals. When the video source is unstable (as, for example, with a video disc player), a master sync generator provides a house (coarse) synchronization signal to the video disc player. (For stable sources, this is unnecessary) The slave synchronization generator locks the video switch, display and computer video generator to the timing of the video image source (such as video disc player). Thus, the rest of the system tracks the jitter of the video source. When the video disc player is scanning or is being spun up or down, the slave sync generator locks onto the house sync signal of the master sync generator, instead of the video disk player's output, to avoid rolling and tearing of the display.

REFERENCES:
patent: Re30785 (1981-10-01), Lovercheck et al.
patent: 3900887 (1975-08-01), Soga et al.
patent: 3993864 (1976-11-01), Pye et al.
patent: 4028733 (1977-06-01), Ulicki
patent: 4064540 (1977-12-01), Jetten
patent: 4074315 (1978-02-01), Kawamura et al.
patent: 4122477 (1978-10-01), Gallo
patent: 4135182 (1979-01-01), Bell et al.
patent: 4145719 (1979-03-01), Hand et al.
patent: 4178613 (1979-12-01), Takahashi et al.
patent: 4179703 (1979-12-01), Abbott
patent: 4213124 (1980-07-01), Barda et al.
patent: 4215369 (1980-07-01), Iijima
patent: 4218698 (1980-08-01), Bart et al.
patent: 4233628 (1980-11-01), Ciciora
patent: 4237484 (1980-12-01), Brown et al.
patent: 4240101 (1980-12-01), Michael et al.
patent: 4245252 (1981-01-01), Nagumo
patent: 4264924 (1981-04-01), Freeman
patent: 4264925 (1981-04-01), Freeman et al.
patent: 4278973 (1981-07-01), Hughes et al.
patent: 4278993 (1981-07-01), Suzuki
patent: 4283736 (1981-08-01), Morio et al.
patent: 4283738 (1981-08-01), Rutishauser
patent: 4287528 (1981-09-01), Levy
patent: 4290062 (1981-09-01), Marti et al.
patent: 4425581 (1984-01-01), Schweppe et al.
Byte Magazine, vol. 7, No. 6 (Jun. 1982).

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Apparatus for combining a video signal with graphics and text fr does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for combining a video signal with graphics and text fr, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for combining a video signal with graphics and text fr will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2084938

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.