×

Character information display apparatus for a partial and a full-screen display

  • US 5,671,019 A
  • Filed: 12/23/1994
  • Issued: 09/23/1997
  • Est. Priority Date: 12/24/1993
  • Status: Expired due to Term
First Claim
Patent Images

1. A character information display apparatus comprising:

  • first generator means for generating a first video signal for a full-screen image including character information;

    second generator means for generating a second video signal for a partial-screen image including character information;

    change-over means for exchanging said first video signal for said full-screen image from said first generator means with said second video signal for said partial-screen image from said second generator means;

    demodulation means for demodulating said character information extracted from one of said first video signal for said full-screen image and said second video signal for said partial-screen image output from said change-over means;

    partial-screen image processing means for compressing said second video signal for said partial-screen image from said second generator means in at least one of a horizontal direction and a vertical direction;

    first compositing means for compositing said first video signal for said full-screen image from said first generator means and a compressed video signal for said partial-screen image from said partial-screen image processing means to form first composite signals for a first composite image;

    second compositing means for compositing said first composite signals from said first composite image and a character signal from said demodulation means to form second composite signals for a second composite image;

    display means for displaying said second composite signals from said second compositing means;

    controller means provided with a first key for turning ON and OFF a display of said partial-screen image and a second key for turning ON and OFF a display of the character information;

    control processor means for controlling said second generator means, said change-over means and said demodulation means under control of said controller means, and further for turning ON and OFF said display of said character information corresponding to said full-screen image when said second key is pressed and said first key is OFF and said partial-screen image is not displayed, and for controlling a cyclic operation to turn ON said display of said character information corresponding to said full-screen image, to turn on said display of said character information corresponding to said partial-screen image and to turn OFF said display of said character information when said second key is pressed and said first key is ON and said partial-screen image is displayed.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×