This paper proposes a residual secondary prediction(RSP)algorithm to further reduce residual energy.The algorithm performs a secondary prediction on the residual samples generated through intra prediction to obtain the sec-ondary residual,and selects the residual group with lower absolute sum as the final prediction residual.Applying the RSP algorithm on the WC test model(VTM)12.3 can save 5.65％bit-rate on average,increase encoding time by 14.6％,and decrease decoding time by 17.5％compared to the basic lossless intra coding.RSP efficiently improves the performance of VVC lossless intra coding at the cost of increasing low coding complexity.
关键词
无损编码/帧内预测/预测残差/二次预测/通用视频编码(VVC)
Key words
lossless coding/intra prediction,prediction residual,secondary prediction,versatile video coding(WC)
维普
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