Back to Search Document details
15th Meeting: Gothenburg, SE, July 2019 2019-07-08 21:20
CE2-related: Removal of luma-chroma dependency in LMCS
Authors: Zhipin Deng ByteDance Li Zhang ByteDance H. Liu ByteDance Kai Zhang ByteDance Yifan Wang ByteDance
Abstract
This contribution proposes to remove the luma-chroma dependency for chroma residual scaling in the luma mapping with chroma scaling (LMCS). Instead of using the reconstructed luma samples to derive a scaling factor on-the-fly, a fixed chroma scaling factor for each LMCS model is used. This fixed chroma scaling factor is calculated once according to a representative luma sample, and then used for all blocks that refer to the same LMCS model. Two methods are provided to select the representative luma sample, including using a selected LMCS bin index and a luma value in the reshaped domain.
Meeting Notes
JVET-O0618 CE2-related: Removal of luma-chroma dependency in LMCS [Z. Deng, L. Zhang, H. Liu, K. Zhang, Y. Wang (Bytedance)]
Cited:
JVET-O0767 X
ARCHIVE :
JVET-O0618.docx JVET-O0618.pdf JVET-O0618_HDRLqp0Lmcs1 vs. HDRCTCLqp1Lmcs0.xlsm JVET-O0618_r1.docx JVET-O0618_r2.docx JVET-O0618_Test1_DualTree.xlsm JVET-O0618_Test1_DualTree_Lqp0Lmcs1 vs. HDRCTCLqp1Lmcs0.xlsm JVET-O0618_Test1_DualTree_Lqp0Lmcs1 vs. Lqp0Lmcs1.xlsm JVET-O0618_Test1_SingleTree.xlsm JVET-O0618_Test2_DualTree.xlsm JVET-O0618_Test2_DualTree_Lqp0Lmcs1 vs. HDRCTCLqp1Lmcs0.xlsm JVET-O0618_Test2_DualTree_Lqp0Lmcs1 vs. Lqp0Lmcs1.xlsm JVET-O0618_Test2_SingleTree.xlsm
Decisions
JVET-O0618 CE2-related: Removal of luma-chroma dependency in LMCS [Z. Deng, L. Zhang, H. Liu, K. Zhang, Y. Wang (Bytedance)]
Citation