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Frame reconstruction for video data compression

  • US 5,757,670 A
  • Filed: 07/28/1995
  • Issued: 05/26/1998
  • Est. Priority Date: 07/28/1995
  • Status: Expired due to Term
First Claim
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1. A frame reconstruction circuit for reconstructing a block of video data that has been subject to compression, the block of video data including a plurality of pixels arranged in a horizontal and vertical array, and comprising:

  • a first interpolation element having an input terminal for receiving data representing the pixels of the block of video data, wherein the first interpolation element averages data representing a first pixel of the block of data with data representing a second pixel adjacent in a first direction in the block of data to the first pixel, and providing the averaged value at an output terminal;

    a second interpolation element having an input terminal coupled to the output terminal of the first interpolation element, wherein the second interpolation element averages an averaged value from the first interpolation element with an averaged value from the first interpolation element associated with a set of pixels of the block of data adjacent in a second direction orthogonal to the first direction, the second interpolation element having an output terminal for providing the average of the two averaged values at the output terminal; and

    a selector element having an input terminal coupled to the output terminal of the second interpolation element, wherein the selector element selectably provides at its output terminal a value representing one of;

    a) an externally provided signal;

    b) the average of the two averaged values from the second interpolation element;

    c) a sum of the externally provided signal and the average of the two averaged values.

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