Method of determining a motion vector for deriving motion vectors of bi-predictive block
AssigneeLG Electronics Inc.
InventorByeong Moon Jeon
Life of this patent
Estimating the term…
Abstract
In the method of determining a motion vector for deriving motion vectors of a bi-predictive image block, a list 1 motion vector of a co-located image block for a bi-predictive image block is selected as a motion vector for deriving motion vectors of the bi-predictive image block when the co-located image block only has a list 1 motion vector.
Claims9
A method of deriving motion vectors of a bi-predictive block in a current picture from a motion vector of a co-located block in a reference picture, comprising:
- selecting a list 1 motion vector of the co-located block in a first list 1 reference picture as the motion vector for deriving list 0 and list 1 motion vectors of the bi-predictive block, if the co-located block only has the list 1 motion vector, the first list 1 reference picture being a type of reference picture permitted to be located temporally before or after the current picture, and the selected list 1 motion vector pointing to a second list 1 reference picture which is a reference picture of the first list 1 reference picture;
- and
- deriving the list 0 and list 1 motion vectors of the bi-predictive block based on the selected list 1 motion vector of the co-located block.
A method of deriving motion vectors of a bi-predictive block in a current picture from a motion vector of a co-located block in a reference picture, comprising:
- selecting a list 1 motion vector of the co-located block in a list 1 reference picture as the motion vector for deriving list 0 and list 1 motion vectors of the bi-predictive block, if only the list 1 motion vector of the co-located block is available, the first list 1 reference picture being a type of reference picture permitted to be located temporally before or after the current picture, and the selected list 1 motion vector pointing to a second list 1 reference picture which is a reference picture of the first list 1 reference picture;
- and
- deriving the list 0 and list 1 motion vectors of the bi-predictive block based on the selected list 1 motion vector of the co-located block.
Dependencies are inferred from the claim text.