METHOD AND APPARATUS FOR IMAGE ENCODING/DECODING USING HIGH RESOLUTION FILTER

摘要

PURPOSE: A method and apparatus for encoding and decoding an image using a high resolution filter are provided to improve the efficiency of encoding by reducing the difference between an actual block and a predicted block. CONSTITUTION: An apparatus for encoding and decoding an image using a high resolution filter generates a sub sample prediction pixel value of a chrominance content using the movement vector value of a present block of an image (S910). The apparatus generates a residual signal by calculating the difference between the original pixel value of the present block and the prediction pixel value (S920) and converts the generated residual signal to a frequency domain (S930). The apparatus quantizes the converted residual signal (S940) and encodes the quantized residual signal to bitstream (S950). [Reference numerals] (AA) Start; (BB) End; (S910) Generate a prediction pixel value by interpolating a chrominance content to a sub sample according to a movement vector value predicted to an inter mode; (S920) Generate a residual signal by calculating the difference between the original pixel value of the present block and the prediction pixel value; (S930) Convert the generated residual signal to a frequency domain; (S940) Quantize the converted residual signal; (S950) Encode the quantized residual signal to bitstream