PREDICTION METHOD AND APPARATUS FOR CHROMA COMPONENT OF IMAGE USING LUMA COMPONENT OF IMAGE

摘要

A METHOD AND APPARATUS FOR PREDICTING A CHROMINANCE SIGNAL FROM A LUMINANCE SIGNAL BY USING A CORRELATION BETWEEN THE LUMINANCE AND CHROMINANCE SIGNALS. A METHOD OF PREDICTING A CHROMINANCE COMPONENT IMAGE GENERATES A DOWN-SAMPLED LUMINANCE SIGNAL MATCHING A CHROMINANCE SIGNAL BY INDEPENDENTLY APPLYING VARIOUS DOWN-SAMPLING METHODS ACCORDING TO A LOCATION OF A LUMINANCE SIGNAL, AND PREDICTS A CHROMINANCE SIGNAL FROM THE DOWN-SAMPLED LUMINANCE SIGNAL, WHILE CONSIDERING A SIZE OF A LUMINANCE PREDICTION UNIT AND A SIZE OF A CHROMINANCE PREDICTION UNIT CORRESPONDING TO EACH OTHER ACCORDING TO A COLOR FORMAT. FIGURE 21