DCT DCT BASED SUBPIXEL ACCURACY MOTION ESTIMATION UTILIZING SHIFTING MATRIX

摘要

A motion prediction method for a 1/4 sub-pixel for video encoding, the method comprising: performing DCT (Discrete Cosine Transform) transformation on an input image frame; Performing motion prediction in a frequency domain to obtain a prediction block having a minimum matching error with a current block through block matching between a DCT transformed current image frame and a previous image frame, The prediction block may include a horizontal / vertical shifting matrix applied with a 1/4 sub-pixel interpolation using a three-dimensional interpolation function, a search range of the previous image frame, Is obtained through a matrix operation using a DCT coefficient matrix of four blocks in the vicinity of the prediction block.