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Further work on top of Tencent’s CfP response
Abstract
This contribution summarizes the recent work on top of Tencent’s CfP response on SDR contents. Three elements of the response, i.e., block structure, intra block copy and merge candidate list construction, are reportedly refined. One encoder only feature, i.e., adaptive chroma QP offset, is newly introduced. It is reported that 7.67% and 38.16% luma BD rate reduction over JEM and HM RA anchor was obtained, respectively.
JVET-J0047 Improvement on top of Tencent’s CfP response [X. Li, X. Xu, X. Zhao, J. Ye, L. Zhao, S. Liu, M. Xu, G. Li (Tencent)]
This contribution was presented Saturday 0950 (chaired by GJS and JRO).
This contribution summarizes the more recent work on top of the CfP response in the SDR category by Tencent. Three elements of the response, i.e., block structure, intra block copy and merge candidate list construction, were reportedly refined. One encoder-only feature, i.e., adaptive chroma QP offset, was introduced. It is reported that 7.67% and 38.16% luma BD rate reduction over the JEM and HM RA anchors was obtained, respectively.
Elements of the presented additional developments:
- “Split to square” – split into same-size square blocks whatever the aspect ratio of non-square higher level is
- Deriving automatic split options at the picture boundary to save signalling
- IBC aligned with inter (as in SCM, via refindex) (see JVET-J0050)
- Merge list construction (see JVET-J0058)
- Adaptive chroma QP offset (see JVET-J0055)
(These elements were all further discussed in separate documents.)
References:
Cited:
PATENTS:
20220224894
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20200014920
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20200404261
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20200014919
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20240187574
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20230403393
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20250330592
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20230336770
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Decisions
(These elements were all further discussed in separate documents.)
Citation