Video coding and decoding
AssigneeCanon Kabushiki Kaisha
InventorsGuillaume Laroche, Christophe Gisquet, Patrice Onno, Jonathan Taquet
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Abstract
A method of encoding a motion vector predictor index, in particular a Merge index, comprises generating a list of motion vector predictor candidates, in particular merge candidates. The list includes an ATMVP candidate. One of the motion vector predictor candidates in the list is selected. A motion vector predictor index for the selected motion vector predictor candidate is generated using CABAC coding. One or more bits of the motion vector predictor index are bypass CABAC coded. For example, only the first bit of the motion vector predictor index is CABAC coded using a single context.
Claims10
A method of encoding a motion vector predictor index, comprising:
- generating a list of motion vector predictor candidates including a candidate for subblock collocated temporal prediction and a candidate for subblock Affine prediction;
- selecting one of the motion vector predictor candidates in the list;
- and
- encoding a motion vector predictor index for the selected motion vector predictor candidate using CABAC coding, a first bit of the motion vector predictor index being CABAC coded and all bits except for the first bit of the motion vector predictor index being bypass CABAC coded.
A method of decoding a motion vector predictor index, comprising:
- generating a list of motion vector predictor candidates including a candidate for subblock collocated temporal prediction and a candidate for subblock Affine prediction;
- decoding the motion vector predictor index using CABAC decoding, a first bit of the motion vector predictor index being CABAC decoded and all bits except for the first bit of the motion vector predictor index being bypass CABAC decoded;
- and
- identifying one of the motion vector predictor candidates in the list, using the decoded motion vector predictor index.
An encoding apparatus for encoding a motion vector predictor index, comprising:
- a generator which generates a list of motion vector predictor candidates including a candidate for subblock collocated temporal prediction and a candidate for subblock Affine prediction;
- a selector which selects one of the motion vector predictor candidates in the list;
- and
- an encoder which encodes a motion vector predictor index for the selected motion vector predictor candidate using CABAC coding, a first bit of the motion vector predictor index being CABAC coded and all bits except for the first bit of the motion vector predictor index being bypass CABAC coded.
A decoding apparatus for decoding a motion vector predictor index, comprising:
- a generator which generates a list of motion vector predictor candidates including a candidate for subblock collocated temporal prediction and a candidate for subblock Affine prediction;
- a decoder which decodes the motion vector predictor index using CABAC decoding, a first bit of the motion vector predictor index being CABAC decoded and all bits except for the first bit of the motion vector predictor index being bypass CABAC decoded;
- and
- an identifying unit which identifies one of the motion vector predictor candidates in the list, using the decoded motion vector predictor index to identify one of the motion vector predictor candidates in the list.
A non-transitory computer-readable storage medium carrying a computer program comprising program instructions adapted to perform, when executed in a computing device, a method of encoding a motion vector predictor index, comprising:
- generating a list of motion vector predictor candidates including a candidate for subblock collocated temporal prediction and a candidate for subblock Affine prediction;
- selecting one of the motion vector predictor candidates in the list;
- and
- encoding a motion vector predictor index for the selected motion vector predictor candidate using CABAC coding, a first bit of the motion vector predictor index being CABAC coded and all bits except for the first bit of the motion vector predictor index being bypass CABAC coded.
A non-transitory computer-readable storage medium carrying a computer program comprising program instructions adapted to perform, when executed in a computing device, a method of decoding a motion vector predictor index, comprising:
- generating a list of motion vector predictor candidates including a candidate for subblock collocated temporal prediction and a candidate for subblock Affine prediction;
- decoding the motion vector predictor index using CABAC decoding, a first bit of the motion vector predictor index being CABAC coded and all bits except for the first bit of the motion vector predictor index being bypass CABAC decoded;
- and
- identifying one of the motion vector predictor candidates in the list, using the decoded motion vector predictor index.
Dependencies are inferred from the claim text.