Back to Search Document details
12th Meeting: Macao, October 2018 2018-09-25 04:42
CE8-related: CPR mode with merge mode improvements
Authors: Xiaozhong Xu Tencent Xinwei Li Tencent Min Gao Tencent J. Ye Tencent Shan Liu Tencent
Abstract
In this contribution, the CPR mode is combined with some improvements from merge mode, i.e., non-adjacent and history-based merge candidates (CE4.4.2, CE4.4.7). Combination of the two are tested.
Meeting Notes
JVET-L0299 CE8-related: CPR mode with merge mode improvements [X. Xu, X. Li, M. Gao, J. Ye, S. Liu (Tencent)]

In this contribution, the CPR mode is combined with some improvements from merge mode, i.e., non-adjacent and history-based merge candidates (CE4.4.2, CE4.4.7). Combination of the two are tested.

With the improved merge mode CE4.4.2, the reported BD rate changes from the base method (BMS-CPR) are as follows:

  • In AI, -0.09%/-0.33%/-1.71% for CTC/Class F/SCC 1080p classes, separately.
  • In RA, -0.58%/-0.61%/-2.06% for CTC/Class F/SCC 1080p classes, separately.
  • In LB, -0.37%/-0.63%/-1.93% for CTC/Class F/SCC 1080p classes, separately.

With the improved merge mode CE4.4.2, the reported BD rate changes from the base method (CPR with 1 CTU search range, CE8.3.1b) are as follows:

  • In AI, -0.06%/-0.21%/-0.95% for CTC/Class F/SCC 1080p classes, separately.
  • In RA, -0.57%/-0.56%/-1.69% for CTC/Class F/SCC 1080p classes, separately.
  • In LB, -0.43%/-0.50%/-2.12% for CTC/Class F/SCC 1080p classes, separately.

With the improved merge mode CE4.4.2+CE4.4.7, the reported BD rate changes from the base method (BMS-CPR) are as follows:

  • In AI, -0.23%/-0.78%/-2.69% for CTC/Class F/SCC 1080p classes, separately.
  • In RA, -0.87%/-1.14%/-2.99% for CTC/Class F/SCC 1080p classes, separately.
  • In LB, -0.52%/-0.94%/-2.87% for CTC/Class F/SCC 1080p classes, separately.

With the improved merge mode CE4.4.2+CE4.4.7, the reported BD rate changes from the base method (CPR with 1 CTU search range, CE8.3.1b) are as follows:

  • In AI, -0.16%/-0.57%/-1.83% for CTC/Class F/SCC 1080p classes, separately.
  • In RA, -0.84%/-1.00%/-2.56% for CTC/Class F/SCC 1080p classes, separately.
  • In LB, -0.56%/-0.94%/-2.74% for CTC/Class F/SCC 1080p classes, separately.

The proposal provided the information showing that the CPR mode combined the merge mode improvement adopted in this meeting has additional gain.

The proponent suggested that if the CE4.4.7 (adopted merge improvement) is applied to CPR, the addional gain is expected to be similar as the one tested using CE4.4.2 in this contribution.

References:
JVET-K1028 JVET-L0266 JVET-L0321 JVET-L0323
Cited:
JVET-L0011 JVET-L0028 X JVET-L0626 X JVET-L0688
ARCHIVE v1 :
JVET-L0299-CPR Full Frame with NonAdj Merge and HMVP_v1.xlsm JVET-L0299-CPR Full Frame with NonAdj Merge_v1.xlsm JVET-L0299-CPR in CE8.3.1b with NonAdj Merge and HMVP_v1.xlsm JVET-L0299-CPR in CE8.3.1b with NonAdj Merge_v1.xlsm JVET-L0299_v1.docx
Decisions
adopted
The proponent suggested that if the CE4.4.7 (adopted merge improvement) is applied to CPR, the addional gain is expected to be similar as the one tested using CE4.4.2 in this contribution.
Citation