Video decoding and encoding equipment, video encoding methods, and computer-readable media (not temporary)

Abstract

The invention relates to a video decoding and encoding device, a video encoding and decoding method, and a non-temporal computer-readable device for video decoding. A video decoding method, which includes the following steps: receiving from a bit stream, a split information flag indicating whether the transformation unit is present in the encoded unit is split; receiving the current transformation unit from the encoded unit based on the split information flag; Define the contextual model by using a contextual model index determined based on the size of the current transformation unit and the value of the color component share of the image to which the current transformation unit belongs, without using any syntactic elements from neighboring blocks of the encoding unit, where the color component index is set for the luminance color component, the first degree color component, and the second degree color component. and the color rendering index for the luminance component has a value of zero, the color rendering index for the first degree color component has a value of one, and the color rendering index for the second degree color component has a value of two; The transformation coefficient flag indicates whether other coefficients exist within the current transformation unit block by decoding the bit stream using Context Adaptive Binary Arithmetic Coding (CABAC) based on a context-aware model; and the transformation coefficient present in the current transformation unit is obtained based on this transformation coefficient flag.