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US 11,153,600 B2Granted
Motion vector generation device, prediction image generation device, video decoding device, and video coding device
AssigneeSharp Kabushiki Kaisha
InventorsTomohiro Ikai, Tomoyuki Yamamoto
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Abstract
To improve a coding efficiency. There are included a PU level search unit configured to search for a motion vector for each prediction block by using a matching process, and a sub-block level search unit configured to search for a motion vector of each of sub-blocks in the prediction block, wherein a precision of a local search by the PU level search unit is lower than a precision of a local search by the sub-block level search unit.
Claims6
A motion vector generation device for generating a motion vector in a current picture, the motion vector generation device comprising:
- a merge candidate derivation circuitry that derives a first motion vector for a coding block by using (i) a motion vector of a neighboring block neighboring to the coding block and (ii) a merge index for the coding block;
- and
- a matching prediction parameter derivation circuitry that derives a second motion vector of each sub-blocks for the coding block by the first motion vector,
- wherein:
- the second motion vector is searched by performing a second local search after performing a first local search for the sub-blocks by using the first motion vector and two reference pictures which are on different sides across the current picture, and
- a second a precision of the second local search is higher precision than a precision of the first local search.
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