Image encoding/decoding method and device for utilizing simplified MPM list generation method, and method for transmitting bitstream

An image encoding method performed by an image encoding apparatus, the image encoding method comprising:

• identifying a prediction mode of a current block;
• identifying whether an intra prediction mode of the current block is an MIP (matrix-based intra prediction) mode, based on the prediction mode of the current block being the intra prediction mode;
• determining a candidate intra prediction mode based on a prediction mode of a neighboring block located around the current block, based on the intra prediction mode of the current block not being the MIP mode;
• generating a candidate intra prediction mode list of the current block based on the candidate intra prediction mode;
• and
• encoding an intra prediction mode indicator specifying the intra prediction mode of the current block based on the candidate intra prediction mode list,
• wherein the candidate intra prediction mode is determined to be a predetermined intra prediction mode, based on the prediction mode of the neighboring block being an MIP mode,
• wherein the candidate intra prediction mode is determined to be the predetermined intra prediction mode, based on the neighboring block not being available.

A method of transmitting a bitstream generated by an image encoding method, the image encoding method comprising:

• identifying a prediction mode of a current block;
• identifying whether an intra prediction mode of the current block is an MIP (matrix-based intra prediction) mode, based on the prediction mode of the current block being the intra prediction mode;
• determining a candidate intra prediction mode based on a prediction mode of a neighboring block located around the current block, based on the intra prediction mode of the current block not being the MIP mode;
• generating a candidate intra prediction mode list of the current block based on the candidate intra prediction mode;
• and
• encoding an intra prediction mode indicator specifying the intra prediction mode of the current block based on the candidate intra prediction mode list,
• wherein the candidate intra prediction mode is determined to be a predetermined intra prediction mode, based on the prediction mode of the neighboring block being an MIP mode,
• wherein the candidate intra prediction mode is determined to be the predetermined intra prediction mode, based on the neighboring block not being available.