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16th Meeting: Geneva, October 2019 2019-10-04 14:34
Non-CE1: A fix on reference sample offset for RPR
Authors: Kai Zhang ByteDance Li Zhang ByteDance H. Liu ByteDance Zhipin Deng ByteDance Jizheng Xu ByteDance Yifan Wang ByteDance
Abstract
With RPR in VVC, a reference sample position is derived assuming that the offset between the top-left corner of the conformance window in the current picture and that in the reference picture is zero. However, the offset may be signalled to be non-zero. In this contribution, it is proposed to derive the reference sample position considering the non-zero offsets. Experimental results reportedly show that the proposed method achieves 16.91%, (PSNR1), 18.53%(PSNR2) BD-rate reductions for scaling ratio 1.5 and 14.89% (PSNR1), 15.25% (PSNR2) BD-rate reductions for scaling ratio 2.0, when the top-left corner of the conformance window in low-resolution pictures is at (64, 64).
Meeting Notes
JVET-P0381 Non-CE1: A fix on reference sample offset for RPR [K. Zhang, L. Zhang, H. Liu, Z. Deng, J. Xu, Y. Wang (Bytedance)]

With RPR in VVC, a reference sample position is derived assuming that the offset between the top-left corner of the conformance window in the current picture and that in the reference picture is zero. However, the offset may be signalled to be non-zero. In this contribution, it is proposed to derive the reference sample position considering the non-zero offsets. Experimental results reportedly show that the proposed method achieves 16.91% (PSNR1), 18.53% (PSNR2) BD-rate reductions for scaling ratio 1.5 and 14.89% (PSNR1), 15.25% (PSNR2) BD-rate reductions for scaling ratio 2.0, when the top-left corner of the conformance window in low-resolution pictures is at (64, 64).

JVET-P0119 / JVET-P0241 / JVET-P0381, JVET-P0219 / JVET-P0590 are closely related.

It was said that this proposal is the same as in JVET-P0119.

References:
JVET-O2001 JVET-O2021
Cited:
JVET-P0021 JVET-P0938 X
ARCHIVE v3 :
JVET-P0381-RPR1.5-PSNR1.xlsm JVET-P0381-RPR1.5-PSNR2.xlsm JVET-P0381-RPR2.0-PSNR1.xlsm JVET-P0381-RPR2.0-PSNR2.xlsm JVET-P0381.docx JVET-P0381.pdf
Decisions
It was said that this proposal is the same as in JVET-P0119.
Citation