Method and apparatus for coding video, and method and apparatus for decoding video accompanied by inter prediction using collocated image

摘要

Provided is an inter prediction method including determining a collocated block of a current block of a current image from among blocks of an image that is restored prior to the current image; preferentially checking whether a first reference list from among reference lists of the collocated block is referred to and selectively checking whether a second reference list is referred to according to whether the first reference list is referred to; based on a result of the checking, determining a single collocated reference list from among the first reference list and the second reference list; determining a reference block of the current block by using motion information of the collocated reference list; and performing inter prediction on the current block by using the determined reference block.

主权项

1. A method of video decoding, the method comprising:
when prediction of a collocated block of a current block is available by using a reference list L0 of the collocated block and prediction of the collocated block is available by using a reference list L1 of the collocated block, and when reference pictures of the current block, are to be output prior to a current picture including the current block, selecting a motion vector corresponding to a reference list of the current block, among an L0 motion vector of the collocated block corresponding to a reference picture determined from the list L0 and an L1 motion vector of the collocated block corresponding to a reference picture determined from the list L1; determining, by using the selected motion vector, the motion vector predictor candidate according to the collocated block; and obtaining a motion vector predictor of the current bock among predictor candidates including the motion vector predictor candidate according to the collocated block.