METHOD AND APPARATUS FOR ENCODING ADAPTIVE INTRA PREDICTION BASED ON MODE OF VALUABLE SIZE PARTITION IN A MACRO BLOCK

摘要

When applying an intra prediction mode according to the macroblock division, the representative value of the corresponding macroblock is not used as an average value of all pixels of the macroblock, but a representative value is applied differently according to the size of the macroblock And a method and an apparatus capable of maintaining a compression ratio as well as preventing deterioration in image quality by reducing a difference between a representative value and each pixel value.To this end, an encoding method using an intra prediction of a macroblock variable size division scheme according to an embodiment of the present invention calculates an average value of a macroblock when the horizontal and vertical sizes of the macroblock are equal to or smaller than a reference size, If the horizontal or vertical size of the macro block exceeds the reference size, the macro block is divided to divide the macro block to generate a minor macro block. The average value is calculated for each of the minor macro blocks, A macro block is divided into horizontal and vertical directions to generate a minor macro block, and each of the minor macroblocks is divided into a plurality of macro blocks, And a representative value for each of the minor macro blocks is set by using the calculated average value.;