Granted Patent B2

US 12,294,735 · App. 18/743,382 · Granted May 6, 2025

Inventors: Kiyofumi Abe (Osaka, JP); Takahiro Nishi (Nara, JP); Tadamasa Toma (Osaka, JP); Ryuichi Kanoh (Osaka, JP); Takashi Hashimoto (Hyogo, JP)

Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA

H04N19/52H04N19/124H04N19/159H04N19/176

Abstract

Claims (22)

1. An encoding method, comprising:

determining whether an inter prediction mode is a merge mode; and

when the inter prediction mode is the merge mode:

deriving a first motion vector of a first current block to be processed, using a motion vector of a previous block which has been previously processed;

deriving a second motion vector of the first current block by performing motion estimation in vicinity of a position specified by the first motion vector;

generating a prediction image of the first current block by performing motion compensation using the second motion vector;

deriving a third motion vector of a second current block to be processed after the first current block, using the first motion vector of the first current block, when the second current block is included in a first picture including the first current block;

deriving a third motion vector of the second current block, using the second motion vector of the first current block, when the second current block is included in a second picture different from the first picture;

deriving a fourth motion vector of the second current block by performing motion estimation in vicinity of a position specified by the third motion vector; and

generating a prediction image of the second current block by performing motion compensation using the fourth motion vector.

2. An encoder, comprising:

circuitry; and

memory, wherein using the memory, the circuitry, in inter prediction processing:

determines whether an inter prediction mode is a merge mode; and

when the inter prediction mode is the merge mode:

derives a first motion vector of a first current block to be processed, using a motion vector of a previous block which has been previously processed;

derives a second motion vector of the first current block by performing motion estimation in vicinity of a position specified by the first motion vector;

generates a prediction image of the first current block by performing motion compensation using the second motion vector;

derives a third motion vector of a second current block to be processed after the first current block, using the first motion vector of the first current block, when the second current block is included in a first picture including the first current block;

derives a third motion vector of the second current block, using the second motion vector of the first current block, when the second current block is included in a second picture different from the first picture;

derives a fourth motion vector of the second current block by performing motion estimation in vicinity of a position specified by the third motion vector; and

generates a prediction image of the second current block by performing motion compensation using the fourth motion vector.

Continuity (7)

References Cited (25)