Method and apparatus for video decoding by chroma multiple conversion, video encoding method and apparatus by chroma multiple conversion

摘要

A method and an apparatus for performing conversion and inverse transformation on a chroma block using a variable conversion kernel among video encoding and decoding are proposed. According to an aspect of the present invention, there is provided a video decoding method comprising: obtaining chroma multiple conversion kernel information indicating whether or not a chroma conversion kernel for inverse transformation of a chroma block is determined as one of a plurality of chroma conversion kernels,; Determining whether to determine the chroma transform kernel using the luma transform kernel when the chroma transform kernel is determined to be one of the plurality of chroma transform kernels according to the multiple transform kernel information; And performing an inverse transform on the chroma block using the chroma transform kernel.