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1. WO2020007167 - VIDEO SIGNAL PROCESSING METHOD AND APPARATUS

Publication Number WO/2020/007167
Publication Date 09.01.2020
International Application No. PCT/CN2019/090709
International Filing Date 11.06.2019
IPC
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
N
PICTORIAL COMMUNICATION, e.g. TELEVISION
21
Selective content distribution, e.g. interactive television, VOD [Video On Demand]
40
Client devices specifically adapted for the reception of, or interaction with, content, e.g. STB [set-top-box]; Operations thereof
43
Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronizing decoder's clock; Client middleware
44
Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to MPEG-4 scene graphs
4402
involving reformatting operations of video signals for household redistribution, storage or real-time display
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
N
PICTORIAL COMMUNICATION, e.g. TELEVISION
9
Details of colour television systems
77
Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
N
PICTORIAL COMMUNICATION, e.g. TELEVISION
9
Details of colour television systems
64
Circuits for processing colour signals
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
N
PICTORIAL COMMUNICATION, e.g. TELEVISION
5
Details of television systems
44
Receiver circuitry
57
Control of contrast or brightness
H04N 21/4402 (2011.01)
H04N 9/77 (2006.01)
H04N 9/64 (2006.01)
H04N 5/57 (2006.01)
CPC
H04N 21/440218
H04N 5/57
H04N 9/64
H04N 9/643
H04N 9/77
Applicants
  • 华为技术有限公司 HUAWEI TECHNOLOGIES CO., LTD. [CN/CN]; 中国广东省深圳市 龙岗区坂田华为总部办公楼 Huawei Administration Building Bantian, Longgang District Shenzhen, Guangdong 518129, CN
Inventors
  • 袁乐 YUAN, Le; CN
  • 王正 WANG, Zheng; CN
  • 吴仁坚 WU, Renjian; CN
  • 黄芳 HUANG, Fang; CN
Priority Data
201810743840.505.07.2018CN
201810799589.419.07.2018CN
Publication Language Chinese (ZH)
Filing Language Chinese (ZH)
Designated States
Title
(EN) VIDEO SIGNAL PROCESSING METHOD AND APPARATUS
(FR) PROCÉDÉ ET APPAREIL DE TRAITEMENT DE SIGNAL VIDÉO
(ZH) 视频信号的处理方法及装置
Abstract
(EN)
The embodiments of the present application provide a video signal processing method and apparatus. The method comprises: after performing color space conversion and conversion from a nonlinear space to a linear space on a video signal to be processed, performing luminance mapping and color gamut conversion; and performing conversion from the linear space to the nonlinear space and color space conversion on the signal subjected to the color gamut conversion, and then performing saturation mapping on the signal subjected to the conversions to obtain a video signal matching a format supported by a display device, so that the video signal to be processed can be correctly displayed on the display device, thereby avoiding the problems of image distortion, inaccurate color performance, loss of details and the like.
(FR)
Les modes de réalisation de la présente invention concernent un procédé et un appareil de traitement de signal vidéo. Le procédé comprend les étapes suivantes : après la réalisation d'une conversion d'espace de couleur et d'une conversion d'un espace non linéaire à un espace linéaire sur un signal vidéo à traiter, effectuer un mappage de luminance et une conversion de gamme de couleurs ; et effectuer une conversion de l'espace linéaire à l'espace non linéaire et une conversion d'espace de couleur sur le signal soumis à la conversion de gamme de couleurs, puis effectuer un mappage de saturation sur le signal soumis aux conversions pour obtenir un signal vidéo correspondant à un format pris en charge par un dispositif d'affichage, de sorte que le signal vidéo à traiter puisse être affiché correctement sur le dispositif d'affichage, ce qui évite les problèmes de distorsion d'image, de performance de couleur inexacte, de perte de détails et analogues.
(ZH)
本申请实施例提供了一种视频信号的处理方法及装置,该方法包括:对待处理视频信号进行色彩空间转换以及非线性空间到线性空间的转换后,进行亮度映射及色域转换,并将色域转换后的信号进行线性空间到非线性空间的转换及色彩空间的转换,再对转换后的信号进行饱和度映射,获得与显示设备支持的格式匹配的视频信号,使待处理视频信号能够正确的显示在显示设备上,避免画面失真,颜色表现不准确及细节丢失等问题。
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