Picture encoding/decoding method and related apparatus

A picture encoding method, comprising:

• obtaining a current picture, wherein the current picture is a to-be-encoded picture;
• selecting, from a knowledge base, K reference pictures of the current picture, wherein at least one reference picture in the knowledge base does not belong to a random access segment in which the current picture is located, K being an integer greater than or equal to 1, the random access segment comprising a picture sequence arranged in a decoding order from a closest random access point before the current picture to a closest random access point after the current picture;
• encoding the current picture according to the K reference pictures, wherein the encoding the current picture according to the K reference pictures includes:
• adding the K reference pictures to a reference picture list of the current picture;
• and
• encoding the current picture according to a reference picture in the reference picture list.

A picture decoding apparatus, comprising:

• a memory storing instructions;
• and
• at least one processor in communication with the memory, the at least one processor configured, upon execution of the instructions, to perform the following steps:
• obtain a current picture of a video, wherein the current picture is a to-be-decoded picture;
• select, from a knowledge base, K reference pictures of the current picture, wherein at least one reference picture in the knowledge base does not belong to a random access segment in which the current picture is located, K being an integer greater than or equal to 1, the random access segment comprising a picture sequence arranged in a decoding order from a closest random access point before the current picture to a closest random access point after the current picture;
• and
• decode the current picture according to the K reference pictures, wherein the decoding the current picture according to the K reference pictures includes:
• adding the K reference pictures to a reference picture list of the current picture;
• and
• decoding the current picture according to a reference picture in the reference picture list.