JVET-AM0127 EE2-3.6 related: Advanced Budget Control for TSRC [R. Xu, W. Zhang, F. Yang (Xidian Univ.), B. Li, F. Xing, P. Han, Z. Wang, W. Song (Hisense)]

In TSRC, allocating the context budget with higher priority to syntax elements that have high coding efficiency can yield performance gains, as demonstrated in EE2-3.6b [1][2]. Following this principle, this contribution proposes to increase the priority of coeff_sign_flag, which also possesses a relatively high coding efficiency.

On top of ECM-17.0, simulation results of the proposed method + EE2-3.6b are reported as below:

The proposed method + EE2-3.6b over ECM-17.0 :

All-Intra:

Class F: {-0.12%, -0.01%, -0.10%, xx.x%, xx.x%}

Class TGM: {-0.23%, -0.29%, -0.28%, xx.x%, xx.x%}

The proposed method + EE2-3.6b over EE2-3.6b :

All-Intra:

Class F: {-0.01%, 0.03%, 0.19%, xx.x%, xx.x%}

Class TGM: {-0.04%, -0.03%, -0.02%, xx.x%, xx.x%}

Further study was requested (not in an EE) to demonstrate that the loss that EE2-3.6b has in the low QP range can be avoided by this method.