INTER-LAYER VIDEO DECODING METHOD AND APPARATUS THEREFOR PERFORMING SUB-BLOCK-BASED PREDICTION, AND INTER-LAYER VIDEO ENCODING METHOD AND APPARATUS THEREFOR PERFORMING SUB-BLOCK-BASED PREDICTION

摘要

Provided is an inter-layer video decoding method including: obtaining motion inheritance information from a bitstream; when the motion inheritance information indicates that motion information of a block of a first layer, which corresponds to a current block of a second layer, is usable as motion information of the second layer, determining whether motion information of a sub-block including a pixel at a predetermined location of the block of the first layer from among sub-blocks of the block of the first layer, which correspond to sub-blocks of the current block, is usable; when it is determined that the motion information of the sub-block including the pixel at the predetermined location of the block of the first layer is usable, obtaining motion information of the sub-blocks of the block of the first layer; and determining motion information of the sub-blocks of the current block based on the obtained motion information of the sub-blocks of the block of the first layer.

主权项

1. An inter-layer video decoding method comprising: obtaining motion inheritance information from a bitstream; when the motion inheritance information indicates that motion information of a block of a first layer, which corresponds to a current block of a second layer, is usable as motion information of the second layer, determining whether motion information of a sub-block comprising a pixel at a predetermined location of the block of the first layer from among sub-blocks of the block of the first layer, which correspond to sub-blocks of the current block, is usable;
when it is determined that the motion information of the sub-block comprising the pixel at the predetermined location of the block of the first layer is usable, obtaining motion information of the sub-blocks of the block of the first layer; and determining motion information of the sub-blocks of the current block based on the obtained motion information of the sub-blocks of the block of the first layer.