Image encoding/decoding method and device, and recording medium having bitstream stored therein

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

• determining an intra prediction mode of a current block;
• configuring a reference sample of intra prediction for the current block by selecting a reference sample line among a plurality of reference sample lines adjacent to the current block;
• generating an intra-predicted block of the current block by performing intra prediction for the current block based on the intra prediction mode and the reference sample;
• determining whether to perform filtering the intra-predicted block based on the reference sample line;
• and
• filtering the intra-predicted block based on whether to perform filtering.

A non-transitory computer-readable recording medium storing a bitstream which is generated by an image encoding method,

• wherein the image encoding method comprises:
• determining an intra prediction mode of a current block;
• configuring a reference sample for intra prediction of the current block by selecting a reference sample line among a plurality of reference sample lines adjacent to the current block;
• generating an intra-predicted block of the current block by performing intra prediction for the current block based on the intra prediction mode and the reference sample;
• determining whether to perform filtering the intra-predicted block based on the reference sample line;
• and
• filtering the intra-predicted block based on whether to perform filtering.