JVET-AG0287 Non-EE2: Rice parameter derivation for transform skip residual coding [M. Coban, M. Karczewicz (Qualcomm)] [late]
Adaptive template-based Rice parameter derivation for transform skip residual coding in VTM-6.0 was later replaced by usage of a constant Rice parameter value in VVC. This contribution proposes to use the Rice parameter derivation method in VTM-6.0 for transform skip residual coding. The proposed method provided following results on top of ECM-11.0:
For class F sequences:
AI { -0.05%, -0.16%, -0.01%}, RA { -0.06%, -0.13%, 0.28%}
For TGM sequences:
AI { -0.23%, -0.27%, -0.31%}, RA { -0.21%, -0.26%, -0.18%}
This proposal suggests to bring back a Rice parameter derivation method that was available in an early-stage VTM (VTM-6.0) but replaced by a different method in VVC standard.
The reported gain is rather small esp. considering it only works on screen content.
No action at this time.