IMAGE DECODING METHOD, IMAGE CODING METHOD, IMAGE DECODING APPARATUS, IMAGE CODING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS
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United States of America Patent
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Issued Date -
Jan 3, 2013
app pub date -
Jun 28, 2012
filing date -
Jun 30, 2011
priority date (Note) -
Abandoned
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Abstract
An image decoding method for decoding, on a block-by-block basis, image data included in a coded bitstream includes: obtaining a fixed number of merging candidates each of which is a candidate set of a prediction direction, a motion vector, and a reference picture index which are to be referenced in decoding of a current block (S303); and obtaining, from the coded bitstream, an index for identifying a merging candidate for the current block (S304), wherein the fixed number of merging candidates include: one or more first candidates each derived based on a prediction direction, a motion vector, and a reference picture index which have been used for decoding a neighboring block spatially or temporally neighboring the current block; and one or more second candidates having a predetermined fixed. The fixed number is greater than or equal to two.
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