A new intra prediction method using channel correlations for the H.264/AVC intra coding
Sang Heon Lee, Jae Won Moon, Jae Woan Byun, Nam Ik Cho · 2009
This paper introduces a new intra prediction algorithm that exploits the correlations between the color channels, for the H.264/AVC intra coding. The main idea is to use the weighted sum of neighboring pixels as a new chroma prediction tool, where the weighting coefficients are determined considering the inter-channel correlations. Specifically the weighting coefficients are determined under the assumption that the similarity of a chrominance channel intensity increases as the distance of the luminance channel intensity decreases. The proposed method is added to the conventional chroma prediction modes with a little modification in the chroma prediction mode binarization. The experiments show that the proposed method provides up to 1.0 dB gain for the color-abundant images.