Adaptively sub-sampling luma and chroma reference pixels in intra-frame prediction for video encoding and decoding
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United States of America Patent
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Jul 17, 2018
Grant Date -
Apr 28, 2016
app pub date -
Jan 7, 2016
filing date -
Jul 10, 2013
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Abstract
In the case where an input image is an image of a non-YUV420 format and an encoding unit is the smallest CU block, an adaptive-sub-sampling luma reference pixel acquisition unit sub-samples reference pixels existing neighboring a luma block corresponding to a chroma prediction target block based on a luma intra prediction mode, and acquires a pixel value of each of the sub-sampled reference pixels. In the case where the input image is an image of a non-YUV420 format and the encoding unit is the smallest CU block, an adaptive-sub-sampling chroma reference pixel acquisition unit sub-samples reference pixels existing neighboring the chroma prediction target block based on the luma intra prediction mode, and acquires a pixel value of each of the sub-sampled reference pixels.
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