Video encoding/decoding method, apparatus, and recording medium having bitstream stored thereon

A method of encoding an image, comprising:

• determining an intra prediction mode of a chroma block;
• and
• generating a prediction block of the chroma block by performing prediction based on the intra prediction mode of the chroma block,
• wherein the determining of the intra prediction mode of the chroma block includes:
• determining whether or not CCLM (Cross-Component Linear Mode) is available for the chroma block, and
• deriving a linear model of the CCLM based on a plurality of reconstructed neighboring samples of a luma block related to the chroma block.

A non-transitory computer readable recording medium storing a bitstream generated by an image encoding method, the image encoding method comprising:

• determining an intra prediction mode of a chroma block;
• and
• generating a prediction block of the chroma block by performing prediction based on the intra prediction mode of the chroma block,
• wherein the determining of the intra prediction mode of the chroma block includes:
• determining whether or not CCLM (Cross-Component Linear Mode) is available for the chroma block, and
• deriving a linear model of the CCLM based on a plurality of reconstructed neighboring samples of a luma block related to the chroma block.