Cross residual transform for lossless intra-coding for HEVC |
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Authors: | Sung-Wook Hong Jae Hee Kwak Yung-Lyul Lee |
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Affiliation: | Digital Media System Laboratory, Department of Computer Engineering, Sejong University, Seoul, Korea |
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Abstract: | A new lossless intra-coding method based on a cross residual transform is applied to the next generation video coding standard HEVC (High Efficiency Video Coding). HEVC includes a multi-directional spatial prediction method to reduce spatial redundancy by using neighboring pixels as a prediction for the pixels in a block of data to be encoded. In the new lossless intra-coding method, the spatial prediction is performed as pixelwise DPCM but is implemented as block-based manner by using cross residual transform on the HEVC standard. The experimental results show that the new lossless intra-coding method reduces the bit rate of approximately 8.43% in comparison with the lossless-intra coding method in the HEVC standard and the proposed method results in slightly better compression ratio than the JPEG200 lossless coding. |
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Keywords: | HEVC Intra-coding Lossless video coding Differential pulse code modulation (DPCM) Residual transform Cross residual transform |
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