Method and device for configuring MPM list
A method for decoding a video performed by a decoding device according to the present disclosure, comprises: a step for deriving a prediction mode of a neighboring block of a current block; a step for deriving an intra prediction mode candidate for configuring an MPM list on the basis of the derived prediction mode of the neighboring block; a step for configuring the MPM list on the basis of the derived intra prediction mode candidate; a step for determining an intra prediction mode for the current block on the basis of the configured MPM list; a step for deriving prediction samples for the current block on the basis of the determined intra prediction mode for the current block; and a step for generating a reconstructed picture on the basis of the prediction samples.
1. A decoding apparatus for an image decoding, the decoding apparatus comprising:
a memory; and
at least one processor connected to the memory, the at least one processor configured to:
derive a prediction mode of a neighboring block of a current block;
derive an intra prediction mode candidate for configuring a most probable mode (MPM) list based on the derived prediction mode of the neighboring block;
configure the MPM list based on the derived intra prediction mode candidate;
determine an intra prediction mode for the current block based on the configured MPM list;
derive prediction samples for the current block based on the determined intra prediction mode for the current block; and
generate a reconstructed picture based on the prediction samples,
wherein an INTRA PLANAR mode is derived as the intra prediction mode candidate based on a determination that the prediction mode of the neighboring block is not for an intra prediction and the prediction mode of the neighboring block is for a combined intra inter prediction (CIIP).
2. An encoding apparatus for an image encoding, the encoding apparatus comprising:
a memory; and
at least one processor connected to the memory, the at least one processor configured to:
derive a prediction mode of a neighboring block of a current block;
derive an intra prediction mode candidate for configuring an MPM list based on the derived prediction mode of the neighboring block;
configure the MPM list based on the derived intra prediction mode candidate;
determine an intra prediction mode for the current block based on the configured MPM list;
derive prediction samples for the current block based on the determined intra prediction mode for the current block;
derive residual samples for the current block based on the prediction samples; and
encode image information including information on the residual samples,
wherein an INTRA PLANAR mode is derived as the intra prediction mode candidate based on a determination that the prediction mode of the neighboring block is not for an intra prediction and the prediction mode of the neighboring block is for a CIIP.
3. An apparatus for transmitting data for an image, the apparatus comprising:
at least one processor configured to obtain a bitstream for the image, wherein the bitstream is generated based on deriving a prediction mode of a neighboring block of a current block, deriving an intra prediction mode candidate for configuring an MPM list based on the derived prediction mode of the neighboring block, configuring the MPM list based on the derived intra prediction mode candidate, determining an intra prediction mode for the current block based on the configured MPM list, deriving prediction samples for the current block based on the determined intra prediction mode for the current block, deriving residual samples for the current block based on the prediction samples, and encoding the image information to generate the bitstream, wherein the image information includes information on the residual samples; and
a transmitter configured to transmit the data comprising the bitstream,
wherein an INTRA PLANAR mode is derived as the intra prediction mode candidate based on a determination that the prediction mode of the neighboring block is not for an intra prediction and the prediction mode of the neighboring block is for a CIIP.