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1. WO2021009004 - LUMA TO CHROMA QUANTIZATION PARAMETER TABLE SIGNALING

Publication Number WO/2021/009004
Publication Date 21.01.2021
International Application No. PCT/EP2020/069407
International Filing Date 09.07.2020
IPC
H04N 19/124 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
102characterised by the element, parameter or selection affected or controlled by the adaptive coding
124Quantisation
H04N 19/186 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
169characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
186the unit being a colour or a chrominance component
H04N 19/70 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
70characterised by syntax aspects related to video coding, e.g. related to compression standards
CPC
H04N 19/124
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
102characterised by the element, parameter or selection affected or controlled by the adaptive coding
124Quantisation
H04N 19/186
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
169characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
186the unit being a colour or a chrominance component
H04N 19/70
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
70characterised by syntax aspects related to video coding, e.g. related to compression standards
Applicants
  • INTERDIGITAL VC HOLDINGS FRANCE, SAS [FR]/[FR]
Inventors
  • DE LAGRANGE, Philippe
  • FRANCOIS, Edouard
  • HIRON, Franck
  • CHEVANCE, Christophe
Agents
  • STAHL, Niclas
  • MORAIN, David
  • ROLLAND, Sophie
  • HUCHET, Anne
Priority Data
19305938.312.07.2019EP
19306122.318.09.2019EP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) LUMA TO CHROMA QUANTIZATION PARAMETER TABLE SIGNALING
(FR) SIGNALISATION DE TABLE DE PARAMÈTRES DE QUANTIFICATION DE LUMINANCE À CHROMINANCE
Abstract
(EN)
Compression technology comprises deriving chroma quantization parameter (Qpc) based on luma Qp using luma-to-chroma Qp mapping table. Such a table may be shared by the encoder and the decoder. However, in some cases, signaling such a table in the data stream instead of having it fixed by a standard may be advantageous. The syntax used to encode, signal and decode this table has a cost in terms of bitrate. The present principles propose to signaling of a luma-to-chroma mapping table in the data stream according to different embodiments.
(FR)
Technologie de compression qui comprend la déduction d'un paramètre de quantification de chrominance (Qpc) sur la base de la luminance Qp à l'aide d'une table de mappage de luminance à chrominance Qp. Une telle table peut être partagée par le codeur et le décodeur. Cependant, dans certains cas, la signalisation d'une telle table dans le flux de données au lieu d'avoir été fixée par un standard peut être avantageuse. La syntaxe utilisée pour coder, signaler et décoder cette table présente un coût en termes de débit binaire. Les présents principes proposent la signalisation d'une table de mappage de luminance à chrominance dans le flux de données selon différents modes de réalisation.
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