Image decoding method for coding DPB parameter, and device therefor
AssigneeLG Electronics Inc.
InventorHendry Hendry
Life of this patent
Estimating the term…
Abstract
A method by which a decoding device decodes an image, according to the present document, comprises the steps of: acquiring image information including decoded picture buffer (DPB) parameter information and an output layer set (OLS) DPB parameter index for a target OLS; deriving the DPB parameter information about the target OLS on the basis of the OLS DPB parameter index; updating a DPB on the basis of the DPB parameter information about the target OLS; and decoding the current picture on the basis of the updated DPB.
Claims6
An image decoding apparatus comprising:
- a memory;
- and
- at least one processor connected to the memory, the at least one processor configured to:
- obtain image information including Decoded Picture Buffer (DPB) parameter information and an Output Layer Set (OLS) DPB parameter index for a target OLS, the OLS DPB parameter index being obtained from a Video Parameter Set (VPS);
- derive DPB parameter information for the target OLS based on the OLS DPB parameter index;
- update a DPB based on the DPB parameter information for the target OLS;
- and
- decode a current picture based on the updated DPB,
- wherein the OLS DPB parameter index specifies the DPB parameter information applied to a multi-layer OLS,
- wherein the obtaining of the OLS DPB parameter index is performed for the multi-layer OLS that includes two or more layers, and
- wherein the obtaining of the OLS DPB parameter index from the VPS is skipped for an OLS that includes only one layer.
An image encoding apparatus comprising:
- a memory;
- and
- at least one processor connected to the memory, the at least one processor configured to:
- generate Decoded Picture Buffer (DPB) parameter information;
- generate an Output Layer Set (OLS) DPB parameter index for DPB parameter information of a target OLS;
- and
- encode image information including the OLS DPB parameter index and the DPB parameter information, the OLS DPB parameter index being encoded into a Video Parameter Set (VPS),
- wherein the OLS DPB parameter index specifies the DPB parameter information applied to a multi-layer OLS,
- wherein the generating of the OLS DPB parameter index is performed for the multi-layer OLS that includes two or more layers, and
- wherein the encoding of the OLS DPB parameter index into the VPS is skipped for an OLS that includes only one layer.
An apparatus for transmitting a bitstream for an image, the apparatus comprising:
- at least one processor configured to obtain the bitstream generated by an encoding apparatus;
- and
- a transmitter configured to transmit the bitstream;
- the bitstream is generated by:
- generating Decoded Picture Buffer (DPB) parameter information;
- generating an Output Layer Set (OLS) DPB parameter index for DPB parameter information of a target OLS;
- and
- encoding image information including the OLS DPB parameter index and the DPB parameter information, the OLS DPB parameter index being encoded into a Video Parameter Set (VPS),
- wherein the OLS DPB parameter index specifies the DPB parameter information applied to a multi-layer OLS,
- wherein the generating of the OLS DPB parameter index is performed for the multi-layer OLS that includes two or more layers, and
- wherein the encoding of the OLS DPB parameter index into the VPS is skipped for an OLS that includes only one layer.
Dependencies are inferred from the claim text.