IMAGE ENCODING AND DECODING METHOD AND APPARATUS

摘要

PURPOSE: A video encoding and decoding method and an apparatus thereof are provided to reduce the complexity of calculation by calculating a final correction value through arithmetical right movement without division or multiply. CONSTITUTION: In case an image encoding and decoding apparatus corrects a prediction value according to an intra prediction mode, a brightness signal, color difference information, or the size of a block, the apparatus obtains a first prediction value in a method for utilizing a reference pixel value (S810). The apparatus determines an initial correction value for the first prediction value of the prediction target pixel (S820). The apparatus calculates a final correction value based on the initial correction value (S830). The apparatus calculates the final prediction value on the basis of the summation of the first prediction value and the final correction value (S840). [Reference numerals] (AA) Start; (BB) End; (S810) Obtain a first prediction value; (S820) Determine an initial correction value; (S830) Calculate a final correction value; (S840) Calculate a final prediction value