Video coding method and apparatus
AssigneesDigitalinsights Inc., Kwangwoon University Industry-Academic Collaboration Foundation
InventorsYongjo AHN, Donggyu SIM, Hochan RYU, Seanae PARK, Woong LIM
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Abstract
The present invention relates to a method and apparatus for performing encoding and decoding using a variably-sized quantization coefficient group, in quantization coefficient group encoding and decoding of video compression technology.
Claims9
A video decoding method, performed by a video decoding apparatus, comprising:
- obtaining sub-group usage information indicating whether sub-group partitioning of a coding unit is usable from a bitstream;
- obtaining partition type information indicating partition of a current coding unit based on the sub-group usage information;
- identifying at least one sub-group by partitioning the current coding unit based on the partition type information;
- and
- inverse-quantizing the current coding unit,
- wherein, when the partition type information indicates that the current coding unit is partitioned into a plurality of sub-groups having a non-square shape, the current coding unit is inverse-quantized by inverse-quantizing each of the plurality of sub-groups having the non-square shape.
A video decoding apparatus, comprising:
- a memory;
- and
- a processor configured to:
- obtain sub-group usage information indicating whether sub-group partitioning of a coding unit is usable from a bitstream,
- obtain partition type information indicating partition of a current coding unit based on the sub-group usage information,
- identify at least one sub-group by partitioning the current coding unit based on the partition type information, and
- inverse-quantize the current coding unit,
- wherein, when the partition type information indicates that the current coding unit is partitioned into a plurality of sub-groups having a non-square shape, the current coding unit is inverse-quantized by inverse-quantizing each of the plurality of sub-groups having the non-square shape.
A video encoding method, performed by a video encoding apparatus, comprising:
- determining whether sub-group partitioning of a coding unit is usable;
- determining partition of a current coding unit;
- identifying at least one sub-group by partitioning the current coding unit based on the determined partition of the current coding unit;
- quantizing the current coding unit;
- and
- encoding the sub-group usage information and the partition type information into a bitstream,
- wherein, when the current coding unit is partitioned into a plurality of sub-groups having a non-square shape, the current coding unit is quantized by quantizing each of the plurality of sub-groups having the non-square shape.
A non-transitory computer readable recording medium storing a bitstream which is generated by a video encoding method,
- wherein the video encoding method comprises
- determining whether sub-group partitioning of a coding unit is usable;
- determining partition of a current coding unit;
- identifying at least one sub-group by partitioning the current coding unit based on the determined partition of the current coding unit;
- quantizing the current coding unit;
- and
- encoding the sub-group usage information and the partition type information into a bitstream,
- wherein, when the current coding unit is partitioned into a plurality of sub-groups having a non-square shape, the current coding unit is quantized by quantizing each of the plurality of sub-groups having the non-square shape.
Dependencies are inferred from the claim text.