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1. WO2020140889 - QUANTIZATION AND DEQUANTIZATION METHOD AND DEVICE

Publication Number WO/2020/140889
Publication Date 09.07.2020
International Application No. PCT/CN2019/130400
International Filing Date 31.12.2019
IPC
H04N 19/176 2014.1
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
17the unit being an image region, e.g. an object
176the region being a block, e.g. a macroblock
H04N 19/134 2014.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
134characterised by the element, parameter or criterion affecting or controlling the adaptive coding
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 19/134
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10using adaptive coding
134characterised by the element, parameter or criterion affecting or controlling the adaptive coding
H04N 19/176
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
17the unit being an image region, e.g. an object
176the region being a block, e.g. a macroblock
Applicants
  • 华为技术有限公司 HUAWEI TECHNOLOGIES CO., LTD. [CN]/[CN]
  • 清华大学 TSINGHUA UNIVERSITY [CN]/[CN]
Inventors
  • 余全合 YU, Quanhe
  • 郑建铧 ZHENG, Jianhua
  • 王力强 WANG, Liqiang
  • 何芸 HE, Yun
Agents
  • 北京龙双利达知识产权代理有限公司 LONGSUN LEAD IP LTD.
Priority Data
201910005657.X03.01.2019CN
Publication Language Chinese (ZH)
Filing Language Chinese (ZH)
Designated States
Title
(EN) QUANTIZATION AND DEQUANTIZATION METHOD AND DEVICE
(FR) PROCÉDÉ DE QUANTIFICATION ET DE DÉQUANTIFICATION ET DISPOSITIF
(ZH) 量化、反量化方法及装置
Abstract
(EN)
The present application provides a quantization method, a dequantization method and a device. The method comprises the following steps: obtaining a size parameter of a current sub-block; and according to the size parameter, determining a first quantization parameter used to quantize the current sub-block. In an embodiment of the present application, the first quantization parameter is determined according to the size parameter of the current sub-block, which is beneficial to improving the quantization effect, and to ensuring a definite image accuracy while improving the amount of information that can be compressed during the quantization process. The invention avoids a configuration method based on the traditional quantization parameter and dequantization parameter, and the quantization parameter and the dequantization parameter corresponding to each sub-block in the entire LCU are the same with each other, thereby limiting the amount of information that can be compressed in the quantization process.
(FR)
La présente invention concerne un procédé de quantification, un procédé de déquantification et un dispositif. Le procédé comprend les étapes suivantes consistant à : obtenir un paramètre de taille d'un sous-bloc courant ; et conformément au paramètre de taille, déterminer un premier paramètre de quantification servant à quantifier le sous-bloc courant. Selon un mode de réalisation de la présente invention, le premier paramètre de quantification est déterminé conformément au paramètre de taille du sous-bloc courant, ce qui est avantageux pour améliorer l'effet de quantification, et pour garantir une précision d'image définie tout en améliorant la quantité d'informations qui peut être compressée lors du traitement de quantification. L'invention évite un procédé de configuration basé sur les paramètres de quantification et de déquantification classiques, et les paramètres de quantification et de déquantification correspondant à chaque sous-bloc de la LCU complète sont identiques l'un à l'autre, ce qui limite la quantité d'informations qui peut être compressée lors du traitement de quantification.
(ZH)
本申请提供了一种量化方法、反量化方法及装置,该方法包括:获取当前子块的尺寸参数;根据所述当前子块的尺寸参数确定对所述当前子块进行量化时使用的第一量化参数。在本申请实施例中,根据当前子块的尺寸参数确定第一量化参数,有利于提高量化的效果,有利于达到在提高量化过程能够压缩的信息量的同时,保证一定的图像精度。避免了基于传统的量化参数、反量化参数的配置方式,整个LCU中每个子块对应的量化参数和反量化参数相同,限制了量化过程能够压缩的信息量。
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