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1. WO2021042232 - METHODS AND SYSTEMS FOR IMPROVED IMAGE ENCODING

Publication Number WO/2021/042232
Publication Date 11.03.2021
International Application No. PCT/CN2019/103949
International Filing Date 02.09.2019
IPC
H04N 19/436 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
42characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
436using parallelised computational arrangements
H04N 19/60 2014.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
60using transform 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 19/186
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 19/42
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
42characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
H04N 19/436
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
42characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
436using parallelised computational arrangements
H04N 19/60
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
60using transform coding
H04N 19/63
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
60using transform coding
63using sub-band based transform, e.g. wavelets
Applicants
  • BEIJING VOYAGER TECHNOLOGY CO., LTD. [CN]/[CN]
Inventors
  • WANG, Fenglei
  • YAN, Zhenqiang
Agents
  • METIS IP (CHENGDU) LLC
Priority Data
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHODS AND SYSTEMS FOR IMPROVED IMAGE ENCODING
(FR) PROCÉDÉS ET SYSTÈMES DE CODAGE D'IMAGE AMÉLIORÉ
Abstract
(EN)
Methods and systems are provided herein for compressing an image. The method may include preprocessing, by a first processor, a source image to obtain a preprocessed image, the preprocessed image including a plurality of tiles. The method may also include processing, by a second processor, the plurality of tiles in parallel by, for each tile of the plurality of tiles: performing a space-to-frequency transformation operation on each tile to obtain a transformation matrix that represents each tile in a frequency domain; and performing a quantization operation on the transformation matrix to obtain a quantization matrix. The method may further include encoding, by the first processor, the quantization matrixes to obtain encoded data of the source image to form a compressed image.
(FR)
Des procédés et des systèmes sont fournis ici pour compresser une image. Le procédé peut comprendre le prétraitement, par un premier processeur, d'une image source afin d'obtenir une image prétraitée, l'image prétraitée comprenant une pluralité de pavés. Le procédé peut également comprendre le traitement, par un second processeur, de la pluralité de pavés en parallèle par la réalisation, pour chaque pavé de la pluralité de pavés d'une opération de transformation espace-fréquence sur chaque pavé afin d'obtenir une matrice de transformation qui représente chaque pavé dans un domaine de fréquence; et la réalisation d'une opération de quantification sur la matrice de transformation afin d'obtenir une matrice de quantification. Le procédé peut en outre comprendre le codage, par le premier processeur, des matrices de quantification afin d'obtenir des données codées de l'image source pour former une image compressée.
Also published as
CN201980045130.8
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