JPWO2020096755A5

JPWO2020096755A5 -

Info

Publication number: JPWO2020096755A5
Application number: JP2021521515A
Authority: JP
Publication date: 2022-10-20

Description

幾つかの実施形態を記載してきた。これらの実施形態の特徴は、単独で又は任意の組み合わせで提供され得る。更に、実施形態は、様々な請求項のカテゴリ及び種類にわたり、以下の特徴、装置又は態様の１つ又は複数を単独で又は任意の組み合わせで含み得る。
［付記１］
ビデオをコード化する方法であって、
－画像のブロックがサブブロックに分割される（５０４）とき、
－前記サブブロックの面を表す値を関連付けること（５０５）、及び
－前記サブブロックの前記面を表す前記値に基づいて、前記サブブロックの量子化パラメータを決定すること
を含む方法。
［付記２］
ビデオを復号する方法であって、
－画像のブロックがサブブロックに分割される（５０４）とき、
－前記サブブロックの面を表す値を関連付けること（５０５）、及び
－前記サブブロックの前記面の前記面を表す前記値に基づいて、前記サブブロックの逆量子化パラメータを決定すること
を含む方法。
［付記３］
ビデオを符号化する装置であって、
－画像のブロックがサブブロックに分割される（５０４）とき、
－前記サブブロックの面を表す値を関連付けること（５０５）、及び
－前記サブブロックの前記面の前記面を表す前記値に基づいて、前記サブブロックの量子化パラメータを決定すること
を行う手段を含む装置。
［付記４］
ビデオを復号する装置であって、
－画像のブロックがサブブロックに分割される（５０４）とき、
－前記サブブロックの面を表す値を関連付けること（５０５）、及び
－前記サブブロックの前記面の前記面を表す前記値に基づいて、前記サブブロックの逆量子化パラメータを決定すること
を行う手段を含む装置。
［付記５］
前記サブブロックの前記面を表す前記値は、画像のブロックがサブブロックに分割されるとき、前記サブブロックの分割の種類を表す値だけインクリメントされる（４０３、４０５、４０７）再分割レベルカウンタである、付記１若しくは２に記載の方法又は付記３若しくは４に記載の装置。
［付記６］
－サブブロックの前記再分割レベルカウンタが再分割の最大値以下である間、前記分割の種類に従って新たな量子化グループを有効にすること
を更に含む、付記５に記載の方法又は装置。
［付記７］
－新たな量子化グループが有効にされるとき、前記ブロックの位置を記憶すること（５０３）
を更に含む、付記６に記載の方法又は装置。
［付記８］
－画像のブロックがターナリ分割に従ってサブブロックに分割され、且つ最も小さいサブブロックの前記再分割レベルカウンタが再分割の最大値を上回るとき、新たな量子化グループを無効にすること
を更に含む、付記６又は７に記載の方法又は装置。
［付記９］
前記インクリメント値は、
クワッド分割の全てのサブブロックについて、２、
バイナリ分割の全てのサブブロックについて、１、
ターナリ分割の横のサブブロックについて、２、及び
ターナリ分割の中央のサブブロックについて、１
に等しい、付記５～８の何れか一項に記載の方法又は付記５～８の何れか一項に記載の装置。
［付記１０］
前記インクリメント値は、
クワッド分割の全てのサブブロックについて、４、
バイナリ分割の全てのサブブロックについて、２、
ターナリ分割の横のサブブロックについて、４、及び中央のサブブロックについて、２、
非対称１／４バイナリ分割の最小のサブブロックについて、４、及び最大のサブブロックについて、１、並びに
非対称１／３バイナリ分割の最小のサブブロックについて、３、及び最大のサブブロックについて、１
に等しい、付記５～８の何れか一項に記載の方法又は付記５～８の何れか一項に記載の装置。
［付記１１］
記憶媒体であって、サブブロックの面を表す値を表す少なくとも構文データ要素を含む、その上で符号化されたビデオビットストリームデータを有し、前記サブブロックは、ビデオの画像のブロックを分割することの結果である、記憶媒体。
［付記１２］
前記サブブロックの前記面を表す前記値は、画像のブロックがサブブロックに分割されるとき、前記サブブロックの分割の種類を表す値だけインクリメントされる再分割レベルカウンタである、付記１１に記載の記憶媒体。
［付記１３］
前記インクリメント値は、
クワッド分割の全てのサブブロックについて、２、
バイナリ分割の全てのサブブロックについて、１、
ターナリ分割の横のサブブロックについて、２、及び
ターナリ分割の中央のサブブロックについて、１
に等しい、付記１２に記載の記憶媒体。
［付記１４］
付記１、２又は５～１０の何れか一項に記載の方法のステップを実施する、プロセッサ（１０１０）によって実行可能なプログラムコード命令を含むコンピュータプログラム。
［付記１５］
非一時的コンピュータ可読媒体上に記憶され、且つプロセッサ（１０１０）によって実行されるとき、付記１、２又は５～１０の何れか一項に記載の方法を装置（１０００）が実施することを可能にするプログラムコード命令を含むコンピュータプログラム製品。 A number of embodiments have been described. Features of these embodiments may be provided singly or in any combination. Furthermore, embodiments may include one or more of the following features, apparatus or aspects, singly or in any combination, across the various claim categories and types.
[Appendix 1]
A method of encoding a video, comprising:
- when blocks of the image are divided (504) into sub-blocks,
- associating (505) values representing faces of said sub-blocks, and
- determining a quantization parameter for the sub-block based on the values representing the faces of the sub-block;
method including.
[Appendix 2]
A method of decoding video, comprising:
- when blocks of the image are divided (504) into sub-blocks,
- associating (505) values representing faces of said sub-blocks, and
- determining an inverse quantization parameter for said sub-block based on said value representing said face of said face of said sub-block;
method including.
[Appendix 3]
An apparatus for encoding video, comprising:
- when blocks of the image are divided (504) into sub-blocks,
- associating (505) values representing faces of said sub-blocks, and
- determining a quantization parameter for said sub-block based on said value representing said face of said face of said sub-block;
a device comprising means for performing
[Appendix 4]
An apparatus for decoding video, comprising:
- when blocks of the image are divided (504) into sub-blocks,
- associating (505) values representing faces of said sub-blocks, and
- determining an inverse quantization parameter for said sub-block based on said value representing said face of said face of said sub-block;
a device comprising means for performing
[Appendix 5]
Said value representing said face of said sub-block is incremented (403, 405, 407) by a value representing the type of division of said sub-block when a block of an image is divided into sub-blocks in a sub-division level counter. A method according to appendix 1 or 2 or a device according to appendix 3 or 4.
[Appendix 6]
- enabling a new quantization group according to the type of partitioning while the sub-block's sub-block level counter is less than or equal to the maximum value of the partitioning;
6. The method or apparatus of clause 5, further comprising:
[Appendix 7]
- Storing the position of said block when a new quantization group is enabled (503);
7. The method or apparatus of clause 6, further comprising:
[Appendix 8]
- disabling a new quantization group when a block of an image is divided into sub-blocks according to ternary division and said sub-division level counter of the smallest sub-block exceeds the maximum value of sub-division;
8. The method or apparatus of clause 6 or 7, further comprising:
[Appendix 9]
The increment value is
2, for every sub-block of the quad partition
1, for every sub-block of the binary partition
2 for sub-blocks across the ternary division, and
1 for the middle sub-block of the ternary partition
A method according to any one of clauses 5-8 or a device according to any one of clauses 5-8, which is equal to
[Appendix 10]
The increment value is
4, for every sub-block of the quad partition;
For every sub-block of the binary partition, 2,
4 for the lateral sub-blocks of the ternary division and 2 for the central sub-blocks,
4 for the smallest sub-block and 1 for the largest sub-block of the asymmetric 1/4 binary partition, and
3 for the smallest sub-block and 1 for the largest sub-block of the asymmetric 1/3 binary split
A method according to any one of clauses 5-8 or a device according to any one of clauses 5-8, which is equal to
[Appendix 11]
A storage medium having video bitstream data encoded thereon including at least syntactic data elements representing values representing planes of sub-blocks, said sub-blocks dividing blocks of an image of a video. A storage medium that is the result of
[Appendix 12]
12. The method of claim 11, wherein said value representing said face of said sub-block is a sub-division level counter incremented by a value representing a type of division of said sub-block when a block of an image is divided into sub-blocks. storage medium.
[Appendix 13]
The increment value is
2, for every sub-block of the quad partition
1, for every sub-block of the binary partition
2 for sub-blocks across the ternary division, and
1 for the middle sub-block of the ternary partition
13. The storage medium of clause 12, which is equal to
[Appendix 14]
A computer program comprising program code instructions executable by a processor (1010) for performing the steps of the method of any one of clauses 1, 2 or 5-10.
[Appendix 15]
When stored on a non-transitory computer-readable medium and executed by a processor (1010), enabling the apparatus (1000) to perform the method of any one of Appendixes 1, 2 or 5-10. computer program product containing program code instructions to

Claims

A method of encoding a video, comprising:
- when a block of an image is divided into sub-blocks,
- associating a sub-block with a sub -division level counter ;
- determining a quantization parameter for said sub-block based on said subdivision level counter ;
- coding said sub-block based on said determined quantization parameter;
wherein said sub-division level counter represents the size of said sub-blocks and is incremented by a value representing a type of division of said sub-blocks when blocks of an image are divided into sub-blocks .

A method of decoding video, comprising:
- when a block of an image is divided into sub-blocks,
- associating a sub-block with a sub -division level counter ;
- determining a quantization parameter for said sub-block based on said subdivision level counter ;
- decoding the sub-block based on the determined quantization parameter;
wherein said sub-division level counter represents the size of said sub-blocks and is incremented by a value representing a type of division of said sub-blocks when blocks of an image are divided into sub-blocks .

An apparatus for encoding video , comprising an encoder,
- when a block of an image is divided into sub-blocks,
- associating a sub-block with a sub -division level counter ;
- determining a quantization parameter for said sub-block based on said subdivision level counter ;
- coding said sub-block based on said determined quantization parameter;
wherein the subdivision level counter represents the size of the sub-blocks and is incremented by a value representing the type of division of the sub-blocks when blocks of an image are divided into sub-blocks. .

An apparatus for decoding video , comprising a decoder,
- when a block of an image is divided into sub-blocks,
- associating a sub-block with a sub -division level counter ;
- determining a quantization parameter for said sub-block based on said subdivision level counter ;
- decoding the sub-block based on the determined quantization parameter;
wherein the subdivision level counter represents the size of the sub-blocks and is incremented by a value representing the type of division of the sub-blocks when blocks of an image are divided into sub-blocks. .

- a method or claim according to claim 1 or 2 , further comprising enabling a new quantization group according to the type of partitioning while the sub-block's sub-block level counter is less than or equal to a maximum value for sub-partitioning. 5. The device according to Item 3 or 4 .

- A method or apparatus according to claim 5 , further comprising storing the position of said block when a new quantization group is enabled.

- further comprising disabling a new quantization group when a block of the image is divided into sub-blocks according to ternary division and said sub-block level counter of the smallest sub-block exceeds the maximum value of sub-division. 7. The method or apparatus according to Item 5 or 6.

The increment value is
2, for every sub-block of the quad partition
1, for every sub-block of the binary partition
2 for the side sub-blocks of the ternary division and 1 for the middle sub-block of the ternary division
A method according to any one of claims 1, 2 or 5-7 or a device according to any one of claims 3-7 , which is equal to .

The increment value is
4, for every sub-block of the quad partition;
For every sub-block of the binary partition, 2,
4 for the lateral sub-blocks of the ternary division and 2 for the central sub-blocks,
4 for the smallest sub-block and 1 for the largest sub-block of the asymmetric 1/4 binary partition and 3 for the smallest sub-block and 1 for the largest sub-block for the asymmetric 1/3 binary partition
A method according to any one of claims 1, 2 or 5-7 or a device according to any one of claims 3-7 , which is equal to .

A method according to any one of claims 1, 2 or 5-9 or an apparatus according to any one of claims 3-9, wherein quantization is applied to luma or chroma components.

A computer program comprising program code instructions executable by a processor for performing the steps of the method of any one of claims 1, 2 or 5-10.

A non-transitory computer readable memory storing instructions which, when executed by a processor, enable the apparatus to perform the method of any one of claims 1, 2 or 5-10. medium .