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US 2026/0303838 A1Published application
Image decoding method and apparatus for coding image information including picture header
AssigneeLG Electronics Inc.
InventorHendry HENDRY
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Abstract
An image decoding method performed by a decoding apparatus according to the present document comprises the steps of: acquiring a flag indicating whether a picture header (PH) network abstraction layer (NAL) unit exists; acquiring a PH on the basis of the flag; and decoding a current picture related to the PH on the basis of the PH.
Claims3
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 is present;
- based on the flag representing that the PH NAL unit is present, obtaining a PH for a current picture from the PH NAL unit;
- based on the flag representing that the PH NAL unit is not present, obtaining the PH for the current picture from a video coding layer (VCL) NAL including a slice header for the current picture;
- and
- decoding the current picture based on the PH,
- wherein based on the flag representing that the PH NAL unit is not present, the current picture includes only one slice.
3 more elements
An image encoding method performed by an encoding apparatus, the method comprising:
- determining whether a Picture Header (PH) Network Abstraction Layer (NAL) unit including a PH related to a current picture is present;
- based on the determination that the PH NAL unit is present, generating the PH NAL unit including the PH;
- based on the determination that the PH NAL unit is not present, generating a video coding layer (VCL) NAL including a slice header for the current picture including the PH;
- generating a flag for whether the PH NAL unit is present based on a result of the determination;
- and
- encoding image information including the flag,
- wherein based on the flag representing that the PH NAL unit is not present, the current picture includes only one slice.
4 more elements
A transmission method of data for image, the method comprising:
- obtaining a bitstream, based on the image information comprising a flag for whether a Picture Header (PH) Network Abstraction Layer (NAL) unit is present;
- and
- transmitting the data including the bitstream of the image information comprising the flag,
- wherein based on the flag representing that the PH NAL unit is present, a PH for a current picture is obtained from the PH NAL unit,
- wherein based on the flag representing that the PH NAL unit is not present, the PH for the current picture is obtained from a video coding layer (VCL) NAL including a slice header for the current picture, and
- wherein based on the flag representing that the PH NAL unit is not present, the current picture includes only one slice.
3 more elements
Dependencies are inferred from the claim text.