Image encoding/decoding method of processing virtual boundary to be picture boundary, method of transmitting bitstream, and recording medium in which bitstream is stored

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

• determining whether a virtual boundary of a reference picture is treated as a picture boundary;
• and
• padding some areas in the reference picture, based on the virtual boundary of the reference picture being treated as the picture boundary,
• wherein first information indicating whether the virtual boundary of the reference picture is treated as the picture boundary is encoded in a bitstream.

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

• determining whether a virtual boundary of a reference picture is treated as a picture boundary;
• and
• padding some areas in the reference picture, based on the virtual boundary of the reference picture being treated as the picture boundary,
• wherein first information indicating whether the virtual boundary of the reference picture is treated as the picture boundary is encoded in a bitstream.