VIDEO ENCODING METHOD AND APPARATUS USING TRANSFORMATION UNIT OF VARIABLE TREE STRUCTURE, AND VIDEO DECODING METHOD AND APPARATUS

摘要

A video encoding method is provided, the method includes: encoding a current region of a video by performing a transformation on the current region by using transformation units in a variable tree-structure which are determined from among transformation units that are hierarchically split from a base transformation unit with respect to the current region and which are generated based on a maximum split level of a transformation unit; and outputting encoded data of the current region, information about an encoding mode, and transformation-unit hierarchical-structure information comprising maximum size information and minimum size information of the transformation unit with respect to the video.

主权项

1. A video decoding apparatus comprising:
an extracting unit which obtains, from a bitstream, maximum split information for an inter mode, information about a prediction mode for a coding unit, and sub-split information about a transformation unit; and a decoding unit which determines a maximum split level of the transformation unit based on the maximum split information for the inter mode when the information about the prediction mode indicates the inter mode, wherein the transformation unit is determined from the coding unit, wherein the extracting unit obtains a sub-split information about a current transformation unit from the bitstream when a current split level of the current transformation unit is less than the maximum split level, and wherein the decoding unit splits the current transformation unit into transformation units of a next split level when the sub-split information about the current transformation unit indicates a split of the current transformation unit, wherein the next split level is greater than the current split level.