Improved residual data coding for high efficiency video coding lossless extension

This paper describes an extension of the new high efficiency video coding (HEVC) standard for supporting lossless video coding. Since HEVC is originally designed for lossy video compression, it cannot provide outstanding performances in lossless video coding. In this paper, we propose new residual data coding methods based on the statistical characteristics of lossless intra coding. The proposed method consists of improved level coding and the binarization table selection with the weighted sum of previously encoded level values. Experimental results show that the proposed method achieves approximately 2.41% bit saving and reaches up to 5.34% bit saving, compared to HEVC lossless intra coding.