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Picture processing apparatus

  • US 4,812,836 A
  • Filed: 12/05/1986
  • Issued: 03/14/1989
  • Est. Priority Date: 04/30/1985
  • Status: Expired due to Fees
First Claim
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1. A picture processing apparatus for shifting picture data corresponding to a picture displayed on a display screen to a predetermined position, comprising:

  • (a) first frame memory means for storing one frame of picture data;

    (b) second frame memory means for storing another frame of picture data;

    (c) first SAM (serial access memory) means for receiving the picture data from said first frame memory means and for providing the picture data in accordance with a first shift clock;

    (d) second SAM means for receiving the picture data from the first SAM means and for providing the picture data in accordance with a second shift clock;

    (e) X- and Y-address counter means for designating addresses of the first and second frame memory means;

    (f) register means for storing an X offset and a Y offset; and

    (g) SAM controller means for providing the first shift clock in accordance with the X offset so that the first SAM means provides the picture data offset by an amount corresponding to the X offset, and providing the second shift clock in accordance with the Y offset so that the second SAM provides the picture data to an address of the second frame memory means offset by an amount corresponding to the Y offset.

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