In this paper, a residual differential pulse code modulation (RDPCM) coding technique using a weighted linear combination of neighboring residual samples is proposed to provide coding efficiency in the screen content video coding. The RDPCM performs the sample-based prediction of residue to reduce spatial redundancies. The proposed method uses the l₁ optimization in the weight derivation by considering the statistical characteristics of graphical components in videos in an intracoding. Specifically we use the least absolute shrinkage and selection operator to derive the weights because the solution is accurate in high variance residue. Furthermore, we enhance parallelism in a line processing by restricting the support to the row-wise prediction to above samples or the column-wise prediction to the left samples. The proposed method uses an explicit RDPCM scheme, so a coding mode determined by rate-distortion optimization is transmitted to a decoder. For coding the overhead, we develop a context design in CABAC based on correlation between an intraprediction direction and an RDPCM prediction mode. It is demonstrated with the experimental results that the proposed method provides a significant coding gain over the state-of-the-art reference codec for screen content video coding.

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reduce spatial redundancies line processing parallelism correlation between an intraprediction direction statistical characteristics of graphical components in videos ratedistortion optimization weight derivation least absolute shrinkage and selection operator high variance residue method context design coding mode weighted linear combination of neighboring residual samples stateoftheart reference codec overhead samplebased prediction of residue screen content video residual differential pulse code modulation rdpcm coding technique columnwise prediction cabac

Min-Joo Kang, Na-Young Kim,Je-Won Kang, Soo-Kyung Ryu,.Efficient Residual DPCM Using an Robust Linear Prediction in Screen Content Video Coding. 18 (10),2054-2065.

Min-Joo Kang, et al."Efficient Residual DPCM Using an Robust Linear Prediction in Screen Content Video Coding" 18

Min-Joo Kang, Na-Young Kim,Je-Won Kang, Soo-Kyung Ryu,"Efficient Residual DPCM Using an Robust Linear Prediction in Screen Content Video Coding"