Analysis of color transforms for lossless frame memory compression

摘要

This paper describes the analysis of color transforms for lossless compression and proposes a line-based lossless frame memory compression using a color transform. Line-based compression methods are required to save frame memory in display devices. A color transform is not included in the existing lossless frame memory compression based on the modified Hadamard transform (MHT) and adaptive Golomb-Rice (AGR) coding. Here we propose a color transform for the existing method by use of analyzing candidate color transforms such as YCoCg-R and RCT. Experimental results indicate that the proposed method gives a shorter bitrate compared with the existing method.