METHOD AND APPARATUS FOR ENCODING VIDEO, AND METHOD AND APPARATUS FOR DECODING VIDEO

摘要

PURPOSE: A coding method of an image, a device thereof, a decoding method thereof, and a device thereof are provided to generate a new prediction block by changing a pixel value of each pixel in the inside of a prediction block through postprocessing for the prediction block, thereby improving compression efficiency of the image. CONSTITUTION: An image coding device generates a first prediction coding unit for a current coding unit(2110). The image coding device generates a second prediction coding unit by changing a pixel value of each pixel of the first prediction coding unit by using each pixel which comprises the first prediction coding unit and one or more surrounding pixels(2120). The image coding device transforms, quantizes, and codes a difference value between the current coding unit and the second prediction coding unit(2130). [Reference numerals] (2110) Generate a first prediction coding unit for a coded current coding unit; (2120) Generate a second prediction coding unit by changing a pixel value of each pixel using each pixel which comprises the first prediction coding unit and one or more surrounding pixels; (2130) Code a difference value between the current coding unit and the second prediction coding unit; (AA) Start; (BB) End