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Image encoder, image decoder, and image encoding system

  • US 8,218,652 B2
  • Filed: 06/17/2009
  • Issued: 07/10/2012
  • Est. Priority Date: 09/25/2008
  • Status: Active Grant
First Claim
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1. An image encoder comprising:

  • an encoding unit for encoding an input image to obtain encoded data;

    a comparison unit for comparing the input image with at least one reference image to identify a part of the input image that is significantly changed with respect to the at least one reference image;

    an information generating unit for generating error information identifying the changed part identified by the comparison unit; and

    an output unit for outputting the encoded data and the error information,wherein the information generating unit divides the input image into bit planes and generates the error information identifying, as the changed part, image blocks in each bit plane that have bit values differing in at least fifty percent of bit positions from bit values in the at least one reference image.

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