Intra Block-DPCM with Layer Separation of Screen Content in VVC

An intra coding algorithm with layer separation is proposed. This algorithm is designed on top of an adopted tool in VVC, called Block DPCM (BDPCM), and benefits from texture information in a neighborhood to derive intensity levels of background and foreground layers. This information is used to reduce large rate of residual in case of incorrect layer prediction by BDPCM. For this purpose, three inter-layer transition states are defined that are either implicitly or explicitly conveyed to the decoder. Once a transition is signaled, the decoder corrects the prediction value using the derived layer information. Experiments on screen contents show a BD-rate gain of about 10% percent over VVC Test Model (VTM) and 1% over the regular BDPCM, with the cost of computational complexity.

[1]  Mohammad Ghanbari,et al.  Gaussian mixture model-based contrast enhancement , 2015, IET Image Process..

[2]  Shan Liu,et al.  Intra Block Copy in HEVC Screen Content Coding Extensions , 2016, IEEE Journal on Emerging and Selected Topics in Circuits and Systems.

[3]  Yue Wang,et al.  Compound Palette Mode for Screen Content Coding , 2019, 2019 Picture Coding Symposium (PCS).

[4]  Frederic Dufaux,et al.  Transform Coefficient Coding for Screen Content in Versatile Video Coding (VVC) , 2019, ICASSP 2019 - 2019 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP).

[5]  Pierre Duhamel,et al.  Short-Distance Intra Prediction of Screen Content in Versatile Video Coding (VVC) , 2018, IEEE Signal Processing Letters.

[6]  Gary J. Sullivan.  Video Coding Standards Progress Report: Joint Video Experts Team Launches the Versatile Video Coding Project , 2018 .

[7]  Guillermo Sapiro,et al.  The LOCO-I lossless image compression algorithm: principles and standardization into JPEG-LS , 2000, IEEE Trans. Image Process..

[8]  G. Bjontegaard,et al.  Calculation of Average PSNR Differences between RD-curves , 2001 .

[9]  Marta Mrak,et al.  Improving screen content coding in HEVC by transform skipping , 2012, 2012 Proceedings of the 20th European Signal Processing Conference (EUSIPCO).

[10]  Jizheng Xu,et al.  Overview of the Emerging HEVC Screen Content Coding Extension , 2016, IEEE Transactions on Circuits and Systems for Video Technology.

[11]  Pierre Duhamel,et al.  Intra prediction using in-loop residual coding for the post-HEVC standard , 2017, 2017 IEEE 19th International Workshop on Multimedia Signal Processing (MMSP).