US 2025/0159243 A1Published application

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

AssigneeJVCKENWOOD Corporation

InventorsShigeru FUKUSHIMA, Hideki TAKEHARA, Hiroya NAKAMURA, Satoru SAKAZUME, Toru KUMAKURA, Hiroyuki KURASHIGE

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Abstract

There is provided a technique that includes a merging candidate list constructor that constructs a merging candidate list including spatial merging candidates, and a triangle merging candidate selector that selects, from the merging candidate list, a first triangle merging candidate that is uni-prediction and a second triangle merging candidate that is uni-prediction, in which the triangle merging candidate selector derives a uni-prediction motion information candidate having a same priority in the first triangle merging candidate and the second triangle merging candidate.

Claims8

Dependent claims

A moving picture coding device using a merge mode, comprising:

a spatial merging candidate derivation unit structured to derive a spatial merging candidate from motion information of a block neighboring a coding target block in a space domain and add it to a merging candidate list;
a temporal merging candidate derivation unit structured to derive a temporal merging candidate from motion information of a block neighboring the coding target block in a time domain and add it to the merging candidate list;
a history-based merging candidate derivation unit structured to derive a history-based merging candidate from a memory for retaining motion information of a coded block and add it to the merging candidate list;
a normal merging candidate selector structured to select a normal merging candidate that is uni-prediction or bi-prediction from the merging candidate list;
a triangle merging candidate selector structured to select, from the merging candidate list, a first triangle merging candidate that is uni-prediction and a second triangle merging candidate that is uni-prediction;
and
a coding unit structured to code a first index that specifies the first triangle merging candidate and a second index that specifies the second triangle merging candidate,
wherein the triangle merging candidate selector derives the first triangle merging candidate from the merging candidate list that includes a merging candidate that is bi-prediction using the first index that specifies the first triangle merging candidate that is uni-prediction, and derives the second triangle merging candidate from the merging candidate list that includes a merging candidate that is bi-prediction using the second index that specifies the second triangle merging candidate that is uni-prediction, and
wherein the triangle merging candidate selector determines whether a candidate in the merging candidate list has L0 motion information and sets the L0 motion information as a triangle merging candidate in a case where the candidate in the merging candidate list has the L0 motion information, and subsequently determines whether the candidate in the merging candidate list has L1 motion information and sets the L1 motion information as another triangle merging candidate in a case where the candidate in the merging candidate list has the L1 motion information to select the first triangle merging candidate and the second triangle merging candidate,
wherein the merging candidate list constructor adds two or more merging candidates to the merging candidate list.

7 more elements

A moving picture coding method using a merge mode, comprising:

a spatial merging candidate derivation step of deriving a spatial merging candidate from motion information of a block neighboring a coding target block in a space domain and adding it to a merging candidate list;
a temporal merging candidate derivation step of deriving a temporal merging candidate from motion information of a block neighboring the coding target block in a time domain and adding it to the merging candidate list;
a history-based merging candidate derivation step of deriving a history-based merging candidate from a memory for retaining motion information of a coded block and adding it to the merging candidate list;
a normal merging candidate selecting step of selecting a normal merging candidate that is uni-prediction or bi-prediction from the merging candidate list;
a triangle merging candidate selecting step of selecting, from the merging candidate list, a first triangle merging candidate that is uni-prediction and a second triangle merging candidate that is uni-prediction;
and
a coding step of coding a first index that specifies the first triangle merging candidate and a second index that specifies the second triangle merging candidate,
wherein the triangle merging candidate selecting step derives the first triangle merging candidate from the merging candidate list that includes a merging candidate that is bi-prediction using the first index that specifies the first triangle merging candidate that is uni-prediction, and derives the second triangle merging candidate from the merging candidate list that includes a merging candidate that is bi-prediction using the second index that specifies the second triangle merging candidate that is uni-prediction, and
wherein the triangle merging candidate selector determines whether a candidate in the merging candidate list has L0 motion information and sets the L0 motion information as a triangle merging candidate in a case where the candidate in the merging candidate list has the L0 motion information, and subsequently determines whether the candidate in the merging candidate list has L1 motion information and sets the L1 motion information as another triangle merging candidate in a case where the candidate in the merging candidate list has the L1 motion information to select the first triangle merging candidate and the second triangle merging candidate,
wherein the merging candidate list construction step adds two or more merging candidates to the merging candidate list.

7 more elements

A non-transitory computer-readable medium storing an executable moving picture coding program using merge mode instructions that, in response to execution, cause a computer to perform operations comprising:

a spatial merging candidate derivation step of deriving a spatial merging candidate from motion information of a block neighboring a coding target block in a space domain and adding it to a merging candidate list;
a temporal merging candidate derivation step of deriving a temporal merging candidate from motion information of a block neighboring the coding target block in a time domain and adding it to the merging candidate list;
a history-based merging candidate derivation step of deriving a history-based merging candidate from a memory for retaining motion information of a coded block and adding it to the merging candidate list;
a normal merging candidate selecting step of selecting a normal merging candidate that is uni-prediction or bi-prediction from the merging candidate list;
a triangle merging candidate selecting step of selecting, from the merging candidate list, a first triangle merging candidate that is uni-prediction and a second triangle merging candidate that is uni-prediction;
and
a coding step of coding a first index that specifies the first triangle merging candidate and a second index that specifies the second triangle merging candidate,
wherein the triangle merging candidate selecting step derives the first triangle merging candidate from the merging candidate list that includes a merging candidate that is bi-prediction using the first index that specifies the first triangle merging candidate that is uni-prediction, and derives the second triangle merging candidate from the merging candidate list that includes a merging candidate that is bi-prediction using the second index that specifies the second triangle merging candidate that is uni-prediction, and
wherein the triangle merging candidate selector determines whether a candidate in the merging candidate list has L0 motion information and sets the L0 motion information as a triangle merging candidate in a case where the candidate in the merging candidate list has the L0 motion information, and subsequently determines whether the candidate in the merging candidate list has L1 motion information and sets the L1 motion information as another triangle merging candidate in a case where the candidate in the merging candidate list has the L1 motion information to select the first triangle merging candidate and the second triangle merging candidate,
wherein the merging candidate list construction step adds two or more merging candidates to the merging candidate list.

7 more elements

A moving picture decoding device using a merge mode, comprising:

a decoding unit structured to decode a first index that specifies a first triangle merging candidate and a second index that specifies a second triangle merging candidate;
a spatial merging candidate derivation unit structured to derive a spatial merging candidate from motion information of a block neighboring a decoding target block in a space domain and add it to a merging candidate list;
a temporal merging candidate derivation unit structured to derive a temporal merging candidate from motion information of a block neighboring the decoding target block in a time domain and add it to the merging candidate list;
a history-based merging candidate derivation unit structured to derive a history-based merging candidate from a memory for retaining motion information of a decoded block and add it to the merging candidate list;
a normal merging candidate selector structured to select a normal merging candidate that is uni-prediction or bi-prediction from the merging candidate list;
and
a triangle merging candidate selector structured to select, from the merging candidate list, the first triangle merging candidate that is uni-prediction and the second triangle merging candidate that is uni-prediction,
wherein the triangle merging candidate selector derives the first triangle merging candidate from the merging candidate list that includes a merging candidate that is bi-prediction using the first index that specifies the first triangle merging candidate that is uni-prediction, and derives the second triangle merging candidate from the merging candidate list that includes a merging candidate that is bi-prediction using the second index that specifies the second triangle merging candidate that is uni-prediction, and
wherein the triangle merging candidate selector determines whether a candidate in the merging candidate list has L0 motion information and sets the L0 motion information as a triangle merging candidate in a case where the candidate in the merging candidate list has the L0 motion information, and subsequently determines whether the candidate in the merging candidate list has L1 motion information and sets the L1 motion information as another triangle merging candidate in a case where the candidate in the merging candidate list has the L1 motion information to select the first triangle merging candidate and the second triangle merging candidate,
wherein the merging candidate list constructor adds two or more merging candidates to the merging candidate list.

7 more elements

A moving picture decoding method using a merge mode, comprising:

a decoding step of decoding a first index that specifies a first triangle merging candidate and a second index that specifies a second triangle merging candidate;
a spatial merging candidate derivation step of deriving a spatial merging candidate from motion information of a block neighboring a decoding target block in a space domain and adding it to a merging candidate list;
a temporal merging candidate derivation step of deriving a temporal merging candidate from motion information of a block neighboring the decoding target block in a time domain and adding it to the merging candidate list;
a history-based merging candidate derivation step of deriving a history-based merging candidate from a memory for retaining motion information of a decoded block and adding it to the merging candidate list;
a normal merging candidate selecting step of selecting a normal merging candidate that is uni-prediction or bi-prediction from the merging candidate list;
and
a triangle merging candidate selecting step of selecting, from the merging candidate list, the first triangle merging candidate that is uni-prediction and the second triangle merging candidate that is uni-prediction,
wherein the triangle merging candidate selecting step derives the first triangle merging candidate from the merging candidate list that includes a merging candidate that is bi-prediction using the first index that specifies the first triangle merging candidate that is uni-prediction, and derives the second triangle merging candidate from the merging candidate list that includes a merging candidate that is bi-prediction using the second index that specifies the second triangle merging candidate that is uni-prediction, and
wherein the triangle merging candidate selector determines whether a candidate in the merging candidate list has L0 motion information and sets the L0 motion information as a triangle merging candidate in a case where the candidate in the merging candidate list has the L0 motion information, and subsequently determines whether the candidate in the merging candidate list has L1 motion information and sets the L1 motion information as another triangle merging candidate in a case where the candidate in the merging candidate list has the L1 motion information to select the first triangle merging candidate and the second triangle merging candidate,
wherein the merging candidate list construction step adds two or more merging candidates to the merging candidate list.

7 more elements

A non-transitory computer-readable medium storing executable instructions of a moving picture decoding program using a merge mode that, in response to execution, cause a computer to perform operations comprising:

a decoding step of decoding a first index that specifies a first triangle merging candidate and a second index that specifies a second triangle merging candidate;
a spatial merging candidate derivation step of deriving a spatial merging candidate from motion information of a block neighboring a decoding target block in a space domain and adding it to a merging candidate list;
a temporal merging candidate derivation step of deriving a temporal merging candidate from motion information of a block neighboring the decoding target block in a time domain and adding it to the merging candidate list;
a history-based merging candidate derivation step of deriving a history-based merging candidate from a memory for retaining motion information of a decoded block and adding it to the merging candidate list;
a normal merging candidate selecting step of selecting a normal merging candidate that is uni-prediction or bi-prediction from the merging candidate list;
and
a triangle merging candidate selecting step of selecting, from the merging candidate list, the first triangle merging candidate that is uni-prediction and the second triangle merging candidate that is uni-prediction,
wherein the triangle merging candidate selecting step derives the first triangle merging candidate from the merging candidate list that includes a merging candidate that is bi-prediction using the first index that specifies the first triangle merging candidate that is uni-prediction, and derives the second triangle merging candidate from the merging candidate list that includes a merging candidate that is bi-prediction using the second index that specifies the second triangle merging candidate that is uni-prediction, and
wherein the triangle merging candidate selector determines whether a candidate in the merging candidate list has L0 motion information and sets the L0 motion information as a triangle merging candidate in a case where the candidate in the merging candidate list has the L0 motion information, and subsequently determines whether the candidate in the merging candidate list has L1 motion information and sets the L1 motion information as another triangle merging candidate in a case where the candidate in the merging candidate list has the L1 motion information to select the first triangle merging candidate and the second triangle merging candidate,
wherein the merging candidate list construction step adds two or more merging candidates to the merging candidate list.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 19/025,598Filed 16 Jan 2025
Priority: JP 2019-0425778 Mar 2019
Published: 15 May 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

H04N 19/513
Motion estimation or motion compensation: processing of motion vectors
H04N 19/52
By encoding: by predictive encoding
H04N 19/109
Selection of coding mode or of prediction mode: among a plurality of temporal predictive coding modes
H04N 19/172
The unit being an image region, e.g. an object: the region being a picture, frame or field

Family

Application17/356,714Continuation · filed 24 Jun 2021
Application18/665,808Continuation · filed 16 May 2024
Application19/025,598Continuation
US 12,022,104 B2Related patent
US 12,549,758 B2Related patent
US 2021/0321129 A1Published application
US 2024/0305810 A1Published application
US 2025/0159243 A1This patent

From the US filing history. Foreign family members aren’t listed.

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