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JVET-C0077 EE2.2: Non Square TU Partitioning [K. Rapaka, J. Chen, L. Zhang, W.–J. Chien, M. Karczewicz (Qualcomm)] [late]
This contribution reports the results of Exploration Experiment (EE) 2.2 on non-square TU partitioning for intra and inter prediction modes. Two partition types (2NxN and Nx2N) are added for intra mode. For non-square partitions, a binary split is allowed at root level (level 0) for intra and inter prediction modes. Further TU splitting process follows the HEVC mechanism. It is reported that the proposed method provides 1.5%, 1.0%, 0.7%, and 0.8% BD-rate saving for AI, RA, LDB and LDP configurations, respectively, over HM 16.6.
There was no need for separate presentation, as this was already covered in the EE summary report. Non-square TU partitioning is implicitly included in QTBT, and there was no need to continue this EE at this time. However, further study is recommended whether elements of the proposal could be beneficial in combination with QTBT.