1. WO2026085663 - TRANSFORM METHODS, APPARATUS, CODER, DECODER AND READABLE STORAGE MEDIUM

Publication Number WO/2026/085663

Publication Date 30.04.2026

International Application No. PCT/CN2024/126143

International Filing Date 21.10.2024

IPC

H04N 19/186 2014.1

H	ELECTRICITY
04	ELECTRIC COMMUNICATION TECHNIQUE
N	PICTORIAL COMMUNICATION, e.g. TELEVISION
19	Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10	using adaptive coding
169	characterised 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
186	the unit being a colour or a chrominance component

H04N 19/186 2014.1

H	ELECTRICITY
04	ELECTRIC COMMUNICATION TECHNIQUE
N	PICTORIAL COMMUNICATION, e.g. TELEVISION
19	Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
10	using adaptive coding
169	characterised 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
186	the unit being a colour or a chrominance component

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Applicants

• OPPO广东移动通信有限公司 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD. [CN]/[CN]

Inventors

• 黄航 HUANG, Hang

Agents

• 北京远志博慧知识产权代理有限公司 BOHUI INTELLECTUAL PROPERTY

Priority Data

Publication Language Chinese (zh)

Filing Language Chinese (zh)

Designated States

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AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CV, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IQ, IR, IS, IT, JM, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, MG, MK, MN, MU, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, WS, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, CV, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SC, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, ME, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)

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Title

(EN) TRANSFORM METHODS, APPARATUS, CODER, DECODER AND READABLE STORAGE MEDIUM

(FR) PROCÉDÉS DE TRANSFORMÉE, APPAREIL, CODEUR, DÉCODEUR ET SUPPORT DE STOCKAGE LISIBLE

(ZH) 变换方法、装置、编码器、解码器及可读存储介质

Abstract

(EN) The present application belongs to the technical field of video processing. Disclosed are transform methods, an apparatus, a coder, a decoder, and a readable storage medium, which can improve the accuracy of determining transform kernels for chrominance blocks, thereby enhancing the transform effect of chrominance blocks. A transform method in the embodiments of the present application comprises: a coder performing intra prediction on a chrominance block to obtain a prediction block of the chrominance block; determining a transform kernel of the chrominance block on the basis of the prediction block; and transforming a residual block of the chrominance block or a transform block of the chrominance block on the basis of the transform kernel. The transform methods in the embodiments of the present application may be applied to video coding and decoding.

(FR) La présente demande se rapporte au domaine technique du traitement vidéo. Sont divulgués des procédés de transformée, un appareil, un codeur, un décodeur et un support de stockage lisible, qui peuvent améliorer la précision de détermination de noyaux de transformée pour des blocs de chrominance, ce qui permet d'améliorer l'effet de transformée de blocs de chrominance. Un procédé de transformée dans les modes de réalisation de la présente demande comprend les étapes suivantes : un codeur effectue une prédiction intra sur un bloc de chrominance pour obtenir un bloc de prédiction du bloc de chrominance ; détermine un noyau de transformée du bloc de chrominance sur la base du bloc de prédiction ; et transforme un bloc résiduel du bloc de chrominance ou un bloc de transformation du bloc de chrominance sur la base du noyau de transformée. Les procédés de transformée dans les modes de réalisation de la présente demande peuvent être appliqués à un codage et un décodage vidéo.

(ZH) 本申请公开了一种变换方法、装置、编码器、解码器及可读存储介质，属于视频处理技术领域，提高确定色度块的变换核的准确性，从而提高色度块的变换效果，本申请实施例的变换方法包括：编码器对色度块进行帧内预测，得到色度块的预测块；基于预测块，确定色度块的变换核；基于变换核，对色度块的残差块或色度块的变换块进行变换。本申请实施例的变换方法可以应用于视频编解码中。

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