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Video processing apparatus

  • US 5,327,158 A
  • Filed: 04/10/1991
  • Issued: 07/05/1994
  • Est. Priority Date: 08/01/1989
  • Status: Expired due to Term
First Claim
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1. A video processing apparatus which displays a background picture, on display means having a display screen, composed of a plurality of pixels in a horizontal direction and a vertical direction, respectively, comprising:

  • position data generating means for generating first position data representative of a position in said horizontal direction and said vertical direction on said display screen;

    parameter data applying means for applying parameter data for rotation of said background picture, said parameter data being sequentially changed within an angular range by which said background picture is to be rotated;

    position data operation means for operating on second position data after performing said rotation on said display screen on the basis of said first position data and said parameter data;

    first storage means for storing a plurality of character codes representative of a plurality of characters each composed of a plurality of pixels, said position operation means operating on said second position data for each of said plurality of pixels;

    first reading means for generating a reading address for reading said character code from said first storage means on the basis of said second position data operated on by said position data operation means;

    second storage means for storing color data of respective pixels constituting said character, said character having a plurality of pixels;

    second reading means for reading said color data from said second storage means on the basis of the character code read by said first reading means and said second position data; and

    video signal generating means for generating a video signal on the basis of the color data read by said second reading means.

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