METHOD AND APPARATUS FOR INTERPOLATING REFERENCE PICTURE AND METHOD AND APPARATUS FOR ENCODING/DECODING IMAGE USING SAME

摘要

The present invention relates to a method and an apparatus for interpolating a reference picture and a method and an apparatus for encoding/decoding an image using the same. The apparatus for interpolating the reference picture of the present invention is characterized in that a plurality of filters for interpolating the reference picture is selected and the reference picture having target accuracy is generated by gradually filtering the reference picture using the filters. The present invention can improve the compression efficiency of the image by interpolating the reference picture through determination of the filter or a filter coefficient for interpolating the reference picture according to the characteristic of the image and interpolating the reference picture through multistage filtering or adaptively changing motion vector resolution in predetermined region units of the image.