METHOD AND APPARATUS FOR ENTROPY ENCODING USING HIERARCHICAL DATA UNIT, AND METHOD AND APPARATUS FOR DECODING

摘要

Provided are video encoding and decoding methods and apparatuses. The video encoding method includes: encoding a video based on data units having a hierarchical structure; determining a context model used for entropy encoding a syntax element of a data unit based on at least one piece of additional information of the data units; and entropy encoding the syntax element by using the determined context model.

主权项

1. A video decoding method comprising:
obtaining, from a bitstream, a split transformation flag indicating whether a transformation unit included in a coding unit is split; determining a size of at least one transformation unit based on the split transformation flag; determining a context model based on the size of the at least one transformation unit and a color component of a picture to which the at least one transformation unit belongs; obtaining a transformation coefficient flag indicating whether there exists a non-zero coefficient in the at least one transformation unit by entropy decoding the bitsteam based on the context model; and obtaining a transformation coefficient included in the at least one transformation unit based on the transformation coefficient flag.