Apparatus for simulating a perspective view of a video image and

Details Apparatus for simulating a perspective view of a video image and Apparatus for simulating a perspective view of a video image and

1978-01-12

1979-09-25

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

35 11R, 35 12N, 358 1, 358 81, 358104, H04N 322

Patent

active

041692721

ABSTRACT:
A simulated perspective view of a landscape is provided on a video display screen used, for example in a video game where a player by means of manual control seeks out various moving targets on the landscape. Specifically, the perspective is achieved by converging the landscape toward the top of the display screen. This is done from a vertical standpoint by distorting in a concave manner the vertical drive voltage. From a horizontal line standpoint a change of horizontal line length is accomplished by a voltage controlled oscillator which has an output frequency which controls readout of video display data. In addition, each line of the specific image is formed by segments and defined by binary bytes to specify either color or level of gray in one portion and the length of the segment in the other.

REFERENCES:
patent: 3833759 (1974-09-01), Yatabe
patent: 3911597 (1975-10-01), Millard

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