JVET-Q0461 QP-independent and slice type-independent initialization of context models for the high throughput CABAC mode of JVET-P0300 [H. Kirchhoffer, B. Bross, T. Nguyen, D. Marpe, H. Schwarz, T. Wiegand (HHI)]

A QP-independent and slice type-independent initialization method is proposed for the high throughput CABAC mode of JVET-P0300. This opens up the possibility for simplifications in a hardware or software implementation. For example, instead of deriving a context model index (for a certain bin), the context model state (which corresponds to a probability value) can directly be derived. For QPs 2-17, the BD-rates are 4.96% for AI, x.xx% for RA, 5.37% for LB, and 5.72% for LP. For the lossless setup, the bit rates increase by 7.78% for AI, 7.34% for RA, and 6.78% for LB.

Further study and better understanding of the problem is needed before considering specific technology. See notes under JVET-Q0387.