METHOD, MEDIUM, AND APPARATUS ENCODING AND/OR DECODING AN IMAGE USING THE SAME CODING MODE ACROSS COMPONENTS

摘要

A method, medium, and apparatus encoding and/or decoding an image in order to increase encoding and decoding efficiency by performing binary-arithmetic coding/decoding on a binary value of a syntax element using a probability model having the same syntax element probability value for respective context index information of each of at least two image components.

主权项

1. A method of decoding an image, the method comprising:
obtaining a predicted direction of a luma component of a current block; obtaining a predicted direction of a chroma component corresponding to the predicted direction of the luma component according to one of predetermined decoding modes; obtaining a predicted block based on the predicted direction of the chroma component; obtaining information indicating whether at least one non-zero coefficient is included in a transform block of a predetermined size; obtaining a residue by inverse-transforming the transform block using the information; and restoring a current image by using the predicted block and the residue, wherein the predicted direction of the chroma component is identical to the predicted direction of the luma component.