US 12,075,083 B2
Image encoding and decoding method with merge flag and motion vectors
Taichiro Shiodera, Tokyo (JP); Akiyuki Tanizawa, Kawasaki (JP); Tomoo Yamakage, Yokohama (JP); and Takeshi Chujoh, Kawasaki (JP)
Assigned to KABUSHIKI KAISHA TOSHIBA, Tokyo (JP)
Filed by KABUSHIKI KAISHA TOSHIBA, Tokyo (JP)
Filed on Mar. 24, 2023, as Appl. No. 18/189,364.
Application 17/406,738 is a division of application No. 17/038,847, filed on Sep. 30, 2020, granted, now 11,323,735, issued on May 3, 2022.
Application 18/189,364 is a continuation of application No. 17/406,738, filed on Aug. 19, 2021, granted, now 11,647,219.
Application 17/038,847 is a continuation of application No. 16/665,103, filed on Oct. 28, 2019, granted, now 10,841,606, issued on Feb. 20, 2020.
Application 16/665,103 is a continuation of application No. 15/864,468, filed on Jan. 8, 2018, granted, now 10,511,851, issued on Dec. 17, 2019.
Application 15/864,468 is a continuation of application No. 14/021,357, filed on Sep. 9, 2013, granted, now 9,900,594, issued on Feb. 20, 2018.
Application 14/021,357 is a continuation of application No. PCT/JP2011/055504, filed on Mar. 9, 2011.
Prior Publication US 2023/0232033 A1, Jul. 20, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/51 (2014.01); H04N 19/426 (2014.01); H04N 19/52 (2014.01)
CPC H04N 19/51 (2014.11) [H04N 19/428 (2014.11); H04N 19/52 (2014.11)] 2 Claims
OG exemplary drawing
 
1. An image decoding method of dividing a first frame included in an input image signal into pixel blocks, and performing inter prediction on a divided first pixel block, comprising:
deriving a plurality of first motion vector candidates from a plurality of motion vectors in a decoded region including motion information of a neighboring pixel block of the first pixel block in the first frame, and a second pixel block which exists in a same region of the first pixel block, the second pixel block being included in a second frame different from the first frame, when a merge flag specifies that the motion vector of the inter prediction is derived from another block; and
predicting a first motion vector which is motion information of the first pixel block, the first pixel block being a decoding target block in the first frame, by using the first motion vector candidates,
wherein one of the first motion vector candidates selected according to a merge index which is first information is used in the inter prediction on the first pixel block,
the motion information of the second pixel block is derived from either a same position of a center position of the first pixel block in the second frame or a same position of a corner position of the first pixel block in the second frame, and
whether the motion information of the second pixel block is derived from the same position of the center position or the same position of the corner position is determined based on at least one of a position or a size of the first pixel block.