Method and apparatus for image encoding and decoding using intra prediction
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United States of America Patent
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Nov 7, 2017
Grant Date -
May 15, 2014
app pub date -
Jun 28, 2012
filing date -
Jun 28, 2011
priority date (Note) -
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Abstract
Provided are a method and apparatus for intra predicting an image, which generate a prediction value via linear interpolation in horizontal and vertical directions of a current prediction unit. The method includes: generating first and second virtual pixels by using at least one adjacent pixel located upper right and lower left to a current prediction unit; obtaining a first prediction value of a current pixel via linear interpolation using an adjacent left pixel located on the same line as the first virtual pixel and the current pixel; obtaining a second prediction value of the current pixel via linear interpolation using an adjacent upper pixel located on the same column as the second virtual pixel and the current pixel; and obtaining a prediction value of the current pixel by using the first and second prediction values.
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