# US 2021/0243436 A1 · Moving-picture coding device, moving-picture coding method, moving-picture coding program, moving-picture decoding device, moving-picture decoding method, and moving-picture decoding program

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- Number: US 2021/0243436 A1
- Document ID: US20210243436A1
- Status: Published application
- Kind: A1
- Application number: 17/269,971
- Filed: 2019-12-20
- Published: 2021-08-05
- Earliest claimed: 2018-12-28
- Assignees: JVCKENWOOD Corporation
- Applicants: JVCKENWOOD Corporation
- Inventors: Shigeru FUKUSHIMA; Hiroya NAKAMURA; Toru KUMAKURA; Hideki TAKEHARA; Satoru SAKAZUME; Hiroyuki KURASHIGE
- Web page: https://patentgrep.com/patent/US20210243436A1

## CPC

- H04N 19/105: Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction
- H04N 19/196: being specially adapted for the computation of encoding parameters, e.g. by averaging previously computed encoding parameters (processing of motion vectors H04N19/513)
- H04N 19/176: the region being a block, e.g. a macroblock
- H04N 19/52: by predictive encoding
- H04N 19/54: using feature points or meshes
- H04N 19/70: characterised by syntax aspects related to video coding, e.g. related to compression standards
- H04N 19/159: Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
- H04N 19/46: Embedding additional information in the video signal during the compression process (H04N19/517, H04N19/68, H04N19/70 take precedence)
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

Technology for improving coding efficiency by performing a block split suitable for picture coding and decoding is provided. A moving-picture coding device for performing an affine transform in units of coding blocks includes an affine inheritance merging candidate derivation unit configured to derive an affine inheritance merging candidate for inheriting an affine model of blocks neighboring a coding target block in a space domain, an affine construction merging candidate derivation unit configured to derive an affine construction merging candidate from a plurality of motion information elements of blocks neighboring the coding target block in a space or time domain, and an affine fixation merging candidate derivation unit configured to derive an affine fixation merging candidate in which motion information of an affine control point is fixed. A motion vector of each affine control point is fixed to (0, 0) in the affine fixation merging candidate.

## Claims

### Claim 1

A moving-picture coding device for performing an affine transform in units of coding blocks, the moving-picture coding device comprising:
an affine inheritance merging candidate derivation unit configured to derive an affine inheritance merging candidate for inheriting an affine model of blocks neighboring a coding target block in a space domain;
an affine construction merging candidate derivation unit configured to derive an affine construction merging candidate from a plurality of motion information elements of blocks neighboring the coding target block in a space or time domain; and
an affine fixation merging candidate derivation unit configured to derive an affine fixation merging candidate in which motion information of an affine control point is fixed,
wherein a motion vector of each affine control point is fixed to (0, 0) in the affine fixation merging candidate.

### Claim 2

A moving-picture coding method of performing an affine transform in units of coding blocks, the moving-picture coding method comprising:
an affine inheritance merging candidate derivation step of deriving an affine inheritance merging candidate for inheriting an affine model of blocks neighboring a coding target block in a space domain;
an affine construction merging candidate derivation step of deriving an affine construction merging candidate from a plurality of motion information elements of blocks neighboring the coding target block in a space or time domain; and
an affine fixation merging candidate derivation step of deriving an affine fixation merging candidate in which motion information of an affine control point is fixed,
wherein a motion vector of each affine control point is fixed to (0, 0) in the affine fixation merging candidate.

### Claim 3

A moving-picture coding program for performing an affine transform in units of coding blocks stored in a computer-readable non-transitory recording medium, the moving-picture coding program causing a computer to execute:
an affine inheritance merging candidate derivation step of deriving an affine inheritance merging candidate for inheriting an affine model of blocks neighboring a coding target block in a space domain;
an affine construction merging candidate derivation step of deriving an affine construction merging candidate from a plurality of motion information elements of blocks neighboring the coding target block in a space or time domain; and
an affine fixation merging candidate derivation step of deriving an affine fixation merging candidate in which motion information of an affine control point is fixed,
wherein a motion vector of each affine control point is fixed to (0, 0) in the affine fixation merging candidate.

### Claim 4

A moving-picture decoding device for performing an affine transform in units of decoding blocks, the moving-picture decoding device comprising:
an affine inheritance merging candidate derivation unit configured to derive an affine inheritance merging candidate for inheriting an affine model of blocks neighboring a decoding target block in a space domain;
an affine construction merging candidate derivation unit configured to derive an affine construction merging candidate from a plurality of motion information elements of blocks neighboring the decoding target block in a space or time domain; and
an affine fixation merging candidate derivation unit configured to derive an affine fixation merging candidate in which motion information of an affine control point is fixed,
wherein a motion vector of each affine control point is fixed to (0, 0) in the affine fixation merging candidate.

### Claim 5

A moving-picture decoding method of performing an affine transform in units of decoding blocks, the moving-picture decoding method comprising:
an affine inheritance merging candidate derivation step of deriving an affine inheritance merging candidate for inheriting an affine model of blocks neighboring a decoding target block in a space domain;
an affine construction merging candidate derivation step of deriving an affine construction merging candidate from a plurality of motion information elements of blocks neighboring the decoding target block in a space or time domain; and
an affine fixation merging candidate derivation step of deriving an affine fixation merging candidate in which motion information of an affine control point is fixed,
wherein a motion vector of each affine control point is fixed to (0, 0) in the affine fixation merging candidate.

### Claim 6

A moving-picture decoding program for performing an affine transform in units of decoding blocks stored in a computer-readable non-transitory recording medium, the moving-picture decoding program causing a computer to execute:
an affine inheritance merging candidate derivation step of deriving an affine inheritance merging candidate for inheriting an affine model of blocks neighboring a decoding target block in a space domain;
an affine construction merging candidate derivation step of deriving an affine construction merging candidate from a plurality of motion information elements of blocks neighboring the decoding target block in a space or time domain; and
an affine fixation merging candidate derivation step of deriving an affine fixation merging candidate in which motion information of an affine control point is fixed,
wherein a motion vector of each affine control point is fixed to (0, 0) in the affine fixation merging candidate.