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Luma Mapping with Chroma Scaling in Versatile Video Coding

Abstract: 

This paper describes a new video coding tool in the Versatile Video Coding standard (VVC) named as luma mapping with chroma scaling (LMCS). Experimental compression performance results for LMCS and non-normative examples for deriving LMCS parameter values are also provided. LMCS has two main components: 1) a process for mapping input luma code values to a new set of code values for use inside the coding loop; and 2) a luma-dependent process for scaling chroma residue values. The first process, luma mapping, aims at improving the coding efficiency for standard and high dynamic range video signals by making better use of the range of luma code values allowed at a specified bit depth. The second process, chroma scaling, manages relative compression efficiency for the luma and chroma components of the video signal. The luma mapping process of LMCS is applied at the pixel sample level, and is implemented using a piecewise linear model. The chroma scaling process is applied at the chroma block level, and is implemented using a scaling factor derived from reconstructed neighboring luma samples of the chroma block.

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Paper Details

Authors:
Taoran Lu, Peng Yin, Sean McCarthy, Walt Husak, Tao Chen, Edouard Francois, Christophe Chevance, Franck Hiron, Jie Chen, Ru-Ling Liao, Yan Ye, Jiancong Luo
Submitted On:
23 March 2020 - 11:59pm
Short Link:
Type:
Presentation Slides
Event:
Presenter's Name:
Fangjun Pu
Paper Code:
DCC2020-ID189
Session:
Session 7
Document Year:
2020
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Document Files

DCC2020_ID189_LMCS_present.pdf

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[1] Taoran Lu, Peng Yin, Sean McCarthy, Walt Husak, Tao Chen, Edouard Francois, Christophe Chevance, Franck Hiron, Jie Chen, Ru-Ling Liao, Yan Ye, Jiancong Luo, "Luma Mapping with Chroma Scaling in Versatile Video Coding", IEEE SigPort, 2020. [Online]. Available: http://sigport.org/5026. Accessed: Jul. 10, 2020.
@article{5026-20,
url = {http://sigport.org/5026},
author = {Taoran Lu; Peng Yin; Sean McCarthy; Walt Husak; Tao Chen; Edouard Francois; Christophe Chevance; Franck Hiron; Jie Chen; Ru-Ling Liao; Yan Ye; Jiancong Luo },
publisher = {IEEE SigPort},
title = {Luma Mapping with Chroma Scaling in Versatile Video Coding},
year = {2020} }
TY - EJOUR
T1 - Luma Mapping with Chroma Scaling in Versatile Video Coding
AU - Taoran Lu; Peng Yin; Sean McCarthy; Walt Husak; Tao Chen; Edouard Francois; Christophe Chevance; Franck Hiron; Jie Chen; Ru-Ling Liao; Yan Ye; Jiancong Luo
PY - 2020
PB - IEEE SigPort
UR - http://sigport.org/5026
ER -
Taoran Lu, Peng Yin, Sean McCarthy, Walt Husak, Tao Chen, Edouard Francois, Christophe Chevance, Franck Hiron, Jie Chen, Ru-Ling Liao, Yan Ye, Jiancong Luo. (2020). Luma Mapping with Chroma Scaling in Versatile Video Coding. IEEE SigPort. http://sigport.org/5026
Taoran Lu, Peng Yin, Sean McCarthy, Walt Husak, Tao Chen, Edouard Francois, Christophe Chevance, Franck Hiron, Jie Chen, Ru-Ling Liao, Yan Ye, Jiancong Luo, 2020. Luma Mapping with Chroma Scaling in Versatile Video Coding. Available at: http://sigport.org/5026.
Taoran Lu, Peng Yin, Sean McCarthy, Walt Husak, Tao Chen, Edouard Francois, Christophe Chevance, Franck Hiron, Jie Chen, Ru-Ling Liao, Yan Ye, Jiancong Luo. (2020). "Luma Mapping with Chroma Scaling in Versatile Video Coding." Web.
1. Taoran Lu, Peng Yin, Sean McCarthy, Walt Husak, Tao Chen, Edouard Francois, Christophe Chevance, Franck Hiron, Jie Chen, Ru-Ling Liao, Yan Ye, Jiancong Luo. Luma Mapping with Chroma Scaling in Versatile Video Coding [Internet]. IEEE SigPort; 2020. Available from : http://sigport.org/5026