IMAGE INTRA PREDICTION METHOD AND APPARATUS

摘要

Disclosed are an image intra prediction method and apparatus. An intra prediction method according to an embodiment of the present invention comprises the steps of: obtaining parameters indicating a correlation between a chrominance block and a luminance block on the basis of neighboring pixels restored in the chrominance block which is intra predicted and neighboring pixels restored in the luminance block corresponding to the chrominance block; and predicting the chrominance block from the luminance block by using the obtained parameters. Also, according to an embodiment of the present invention, the step of obtaining parameters comprises obtaining parameters through a predetermined operation process using neighbor pixels restored in the chrominance and luminance blocks, where the operation process comprises a scaling process changing bit depths of the parameters to prevent overflow.