Video encoding/decoding method and apparatus for performing PDPC and method for transmitting bitstream

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

• generating prediction samples by performing intra prediction on a current block;
• determining whether to apply position dependent intra prediction combination (PDPC) to the prediction samples;
• and
• generating final prediction samples of the current block, by applying PDPC to the prediction samples based on the determination,
• wherein, based on a size of the current block satisfying a predetermined condition, it is determined to apply PDPC to the prediction samples,
• wherein the predetermined condition is that a width of the current block is greater than or equal to 4 and a height of the current block is greater to or equal to 4, and
• wherein, based on block difference pulse code modulation (BDPCM) being not applied to the current block, the current block being a chroma block and the intra prediction mode of the current block being an angular prediction mode having an index of 18 or less, it is determined to apply PDPC to the prediction samples.

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

• generating prediction samples by performing intra prediction on a current block;
• determining whether to apply position dependent intra prediction combination (PDPC) to the prediction samples;
• and
• generating final prediction samples of the current block, by applying PDPC to the prediction samples based on the determination,
• wherein, based on a size of the current block satisfying a predetermined condition, it is determined to apply PDPC to the prediction samples,
• wherein the predetermined condition is that a width of the current block is greater than or equal to 4 and a height of the current block is greater to or equal to 4, and
• wherein, based on block difference pulse code modulation (BDPCM) being not applied to the current block, the current block being a chroma block and the intra prediction mode of the current block being an angular prediction mode having an index of 18 or less, it is determined to apply PDPC to the prediction samples.

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

• generating prediction samples by performing intra prediction on a current block;
• determining whether to apply position dependent intra prediction combination (PDPC) to the prediction samples;
• and
• generating final prediction samples of the current block, by applying PDPC to the prediction samples based on the determination,
• wherein, based on a size of the current block satisfying a predetermined condition, it is determined to apply PDPC to the prediction samples,
• wherein the predetermined condition is that a width of the current block is greater than or equal to 4 and a height of the current block is greater to or equal to 4, and
• wherein, based on block difference pulse code modulation (BDPCM) being not applied to the current block, the current block being a chroma block and the intra prediction mode of the current block being an angular prediction mode having an index of 18 or less, it is determined to apply PDPC to the prediction samples.