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Digital signal processing system

  • US 5,446,456 A
  • Filed: 12/29/1993
  • Issued: 08/29/1995
  • Est. Priority Date: 04/30/1993
  • Status: Expired due to Term
First Claim
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1. A digital signal processing system comprising:

  • error-correction-decoder means for error-correction-decoding data for generating an error flag for errors beyond an error correction capability;

    data restoring means for compensating motion of the error-correction-decoded data according to a motion signal which is generated between sequential frames for restoring the error-correction-decoded data into an original video signal; and

    error concealment means for replacing a video signal for an area where the error is not corrected among the error-correction-decoded data with a previous frame video signal,wherein the error concealment means comprises;

    a first frame memory for storing luminance data output from the data restoring means in frame units;

    a second frame memory for storing color data output from the data restoring means in frame units;

    selection means for selecting outputs of the first and second frame memories or the data restoring means responsive to an error flag output from the error-correction-decoder means; and

    address generation means for generating an address obtained by adding a position corresponding to the motion signal to a current frame position or an address of the current frame position responsive to the error flag and for outputting the address generated as an address signal of the first and second frame memories.

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