JVET-AM0065 Non-EE2: Joint reordering of GPM with intra prediction [Z. Sun, Y. Yu, L. Zhang, H. Yu, D. Wang (OPPO)]

This contribution proposes modifications to the joint reordering of GPM split modes and partition indices, where intra-prediction mode candidates are introduced to the reordering GPM. With the proposed method JRGPM-Intra, the GPM modes consisting of intra-prediction, regular GPM and TM-GPM will be reordered jointly. Simulation results of the proposed method on top of ECM-17.0 are reported below:

RA: -0.08%, -0.06 %, -0.11 %, EncT 101.5%, DecT 100.7%

LB: -0.09%, -0.01 %, 0.06 %, EncT 101.8%, DecT 100.8%

Results confirmed by crosscheckers. Relevant coding gain, consistent over classes.

Interest was expressed by other experts to investigate this in an EE. Better tradeoff with encoding time should be achieved.