ENCODING METHOD AND DEVICE OF VIDEO USING DATA UNIT OF HIERARCHICAL STRUCTURE, AND DECODING METHOD AND DEVICE THEREOF

摘要

Provided are a method and a device for encoding a video by using a data unit of a hierarchical structure, and a method and a device for decoding the same. A video encoding device includes: a hierarchical encoder configured to encode a picture of a video based on a data unit of a hierarchical structure; and an entropy coder configured to determine a context model used for entropy coding of a symbol based on hierarchical information of a data unit to which the symbol of the encoded picture belongs, and to entropy encode the symbol using the determined context model.

主权项

1. A video decoding method comprising:
receiving a bitstream including a transformation unit split flag indicating whether a transformation unit is split, the transformation unit being included in a coding unit; determining a context model based on a size of the transformation unit; obtaining the transformation unit split flag by entropy decoding the bitstream based on the determined context model; and when the transformation unit split flag indicates a split of the transformation unit, splitting the transformation unit into a plurality of transformation units having lower depth, wherein the context model includes an information to determine a most probable symbol (MPS).