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US 11,451,786 B2Granted
Image coding method using buffer compression in CTU unit, and apparatus therefor
AssigneeLG Electronics Inc.
InventorsHyeongmoon Jang, Junghak Nam
Life of this patent
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Abstract
Provided is an image decoding method performed by a decoding apparatus, which includes: decoding a first coding tree unit (CTU) in a current picture; storing motion information of the first CTU in a line buffer; and decoding a second CTU in the current picture by using the motion information of the first CTU stored in the line buffer, in which the first CTU is located around a left side of the second CTU or located around a top of the second CTU.
Claims10
An image decoding method performed by a decoding apparatus, the method comprising:
- decoding a first coding tree unit (CTU) in a current picture;
- storing motion information of the first CTU in a line buffer;
- and
- decoding a second CTU in the current picture by using the motion information of the first CTU stored in the line buffer,
- wherein the decoding of the second CTU in the current picture comprises:
- performing prediction on a current block in the second CTU, and
- deriving prediction samples for the current block in the second CTU based on the prediction,
- wherein a CTU includes at least one or more coding units,
- wherein the first CTU is located around a left side of the second CTU or located around a top of the second CTU,
- wherein the storing of the motion information of the first CTU in the line buffer comprises:
- compressing the motion information of the first CTU stored in the line buffer in units of a predetermined block,
- wherein the compressing of the motion information of the first CTU in units of the predetermined block comprises:
- selecting a candidate block at a representative location among blocks included in the predetermined block unit, wherein the candidate block is a block included in the first CTU, and
- including a motion vector of the candidate block in motion information stored on behalf of blocks included in the predetermined block unit.
11 more elements
An image encoding method performed by an encoding apparatus, the method comprising:
- encoding a first coding tree unit (CTU) in a current picture;
- storing motion information of the first CTU in a line buffer;
- and
- encoding a second CTU in the current picture by using the motion information of the first CTU stored in the line buffer,
- wherein the encoding of the second CTU in the current picture comprises:
- performing prediction on a current block in the second CTU, and
- deriving prediction samples for the current block in the second CTU based on the prediction,
- wherein a CTU includes at least one or more coding units,
- wherein the first CTU is located around a left side of the second CTU or located around a top of the second CTU,
- wherein the storing of the motion information of the first CTU in the line buffer comprises:
- compressing the motion information of the first CTU stored in the line buffer in units of a predetermined block,
- wherein the compressing of the motion information of the first CTU in units of the predetermined block comprises:
- selecting a candidate block at a representative location among blocks included in the predetermined block unit, wherein the candidate block is a block included in the first CTU and
- including a motion vector of the candidate block in motion information stored on behalf of the blocks included in the predetermined block unit.
11 more elements
Dependencies are inferred from the claim text.