PH NAL unit coding-related image decoding method, and device for same
AssigneeLG Electronics Inc.
InventorHendry Hendry
Life of this patent
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Abstract
An image decoding method performed by a decoding device according to the present document is characterized by comprising the steps of: acquiring a flag indicating whether a picture header (PH) network abstraction layer (NAL) unit including a PH for the current picture is present; acquiring a video coding layer (VCL) NAL unit including a slice header and slice data for the current slice of the current picture; acquiring the PH on the basis of the flag; and decoding the current picture on the basis of the PH, the slice header, and the slice data.
Claims12
An image decoding method performed by a decoding apparatus, the method comprising:
- obtaining a flag for whether a Picture Header (PH) Network Abstraction Layer (NAL) unit including a PH for a current picture is present;
- obtaining a Video Coding Layer (VCL) NAL unit including a slice header and slice data for a current slice in the current picture;
- obtaining the PH based on the flag;
- and
- decoding the current picture based on the PH, the slice header and the slice data,
- wherein based on the flag representing that the PH NAL unit is not present, the current picture includes only the current slice.
An image encoding method performed by an encoding apparatus, the method comprising:
- generating a Video Coding Layer (VCL) Network Abstraction Layer (NAL) unit including a slice header and slice data for a slice in a current picture;
- determining whether a Picture Header (PH) NAL unit including a PH for the current picture is present;
- generating the PH and a flag for whether the PH NAL unit is present based on a result of the determination;
- and
- encoding image information including the VCL NAL unit, the PH and the flag,
- wherein based on the flag representing that the PH NAL unit is not present, the current picture includes only the current slice.
A non-transitory computer-readable storage medium storing a bitstream generated by a method, the method comprising:
- generating a Video Coding Layer (VCL) Network Abstraction Layer (NAL) unit including a slice header and slice data for a slice in a current picture;
- determining whether a Picture Header (PH) NAL unit including a PH for the current picture is present;
- generating the PH and a flag for whether the PH NAL unit is present based on a result of the determination;
- encoding image information including the VCL NAL unit, the PH and the flag;
- and
- generating the bitstream including the image information,
- wherein based on the flag representing that the PH NAL unit is not present, the current picture includes only the current slice.
Dependencies are inferred from the claim text.