Recording medium having recorded thereon coded information using plus and/or minus rounding of images
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United States of America Patent
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Oct 13, 2015
Grant Date -
Aug 27, 2015
app pub date -
Apr 28, 2015
filing date -
Jun 9, 1997
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Abstract
A computer-readable medium having stored thereon an image decoding program which, when executed by a computer, implements operations including: extracting motion vector information, and rounding method information from input information to be decoded; synthesizing a prediction image by performing motion compensation using the motion vector information and a reference image which is a previously decoded image; and synthesizing a decoded image by adding the prediction image to an error image; wherein a rounding method used for pixel value interpolation in performing the motion compensation for synthesizing the prediction image is one of a positive rounding method and a negative rounding method which is different from a one of a positive rounding method and a negative rounding method used for pixel value interpolation in performing the motion compensation for synthesizing a last prediction image.
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