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EP0431845A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Video signal convertion

Assignee: Pinnacle Systems Inc
•
Filing: 1990-11-30
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Granted: —
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Expires: 2010-11-30
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Abstract

Abstract A general purpose scan converter for converting video signals from one scan rate to another scan rate accepts NTSC, PAL, EGA, VGA, or other inputs in standard video formats and convert them to be displayed on a monitor. Several modes of operation including continuous frame grabbing, grab and hold image, and dynamic scaling are provided. In addition, window sizing and window location options are under user control. The input sources for video may be selected, and a robust voltage controlled oscillator is provided for timing. The converter device operates continuously in real time and provides a high resolution output signal to a monitor. Special effects such as clipping of overlapping windows, superimposing graphics or text, and animation are supported.

Inventors

  • 👤 Michael Maietta
  • 👤 David M. Smith

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-05 16:11
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/64; H04N9/642; G; G09; G09G; G09G5/00; G09G5/14; G09G5/36; G09G5/39; G09G5/391; G09G5/393; G09G2340/00; G09G2340/12; G09G2340/125

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 124 words
A converter for converting a video signal comprising: a buffer for storing a portion of the video signal; an address generator for determining a display location for the video signal; a frame buffer operatively connected to the buffer for storing the video signal and the display location; memory containing data on locations of each of a plurality of display windows stored in the frame buffer; means for using the data to control an appearance of the plurality of display windows relative to one another; and a control sequencer operatively connected to the buffer and to the address generator for providing the portion of the video signal stored in the buffer and the display location to the frame buffer upon occurrence of a predetermined event.
Claim 2
Independent Claim 103 words
A method of converting a video signal comprising the steps of: storing a portion of the video signal; providing the stored portion of the video signal to a frame buffer upon occurrence of a predetermined event; determining a location on a display for the video signal; storing data relating to a location of each of a plurality of display windows stored in the frame buffer; controlling by the stored data an appearance of each of the plurality of display windows relative to one another; and providing the portion of the video signal in the frame buffer to the display at the determined location.

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