Image decoding method and device
AssigneeLG Electronics Inc.
InventorHendry HENDRY
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Abstract
An image decoding method performed by a decoding device according to the present document comprises the steps of: obtaining image information; and updating a decoded picture buffer (DPB) on the basis of the image information, wherein the step of obtaining the image information comprises the steps of: obtaining an output layer set (OLS) DPB parameter index for a target OLS; and obtaining DPB parameter information relating to the target OLS on the basis of the OLS DPB parameter index.
Claims7
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;
- and
- update a decoded picture buffer (DPB) based on the image information,
- wherein the at least one processor, to obtain the image information, further configured to:
- obtain an output layer set (OLS) DPB parameter index for a target OLS;
- and
- obtain DPB parameter information for the target OLS based on the OLS DPB parameter index,
- wherein the OLS DPB parameter index is obtained based on a number of the OLS.
An image encoding apparatus comprising:
- a memory;
- and
- at least one processor connected to the memory, the at least one processor configured to:
- update a decoded picture buffer (DPB);
- and
- encode image information,
- wherein the at least one processor, to encode the image information, further configured to:
- encode DPB parameter information for output layer sets (OLSs);
- and
- encode an OLS DPB parameter index for DPB parameter information for a target OLS among the DPB parameter information for the OLSs,
- wherein the OLS DPB parameter index is encoded based on a number of the OLS.
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:
- updating a decoded picture buffer (DPB);
- and
- encoding image information,
- wherein the encoding the image information includes:
- encoding DPB parameter information for output layer sets (OLSs);
- encoding an OLS DPB parameter index for DPB parameter information for a target OLS among the DPB parameter information for the OLSs;
- and
- generating the bitstream including the OLS DPB parameter index and the DPB parameter information for the OLSs,
- wherein the OLS DPB parameter index is encoded based on a number of the OLS.
Dependencies are inferred from the claim text.