WO2025101477A1 - Methods and devices for adaptive loop filter and cross- component adaptive loop filter - Google Patents

Methods and devices for adaptive loop filter and cross- component adaptive loop filter Download PDF

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Publication number
WO2025101477A1
WO2025101477A1 PCT/US2024/054502 US2024054502W WO2025101477A1 WO 2025101477 A1 WO2025101477 A1 WO 2025101477A1 US 2024054502 W US2024054502 W US 2024054502W WO 2025101477 A1 WO2025101477 A1 WO 2025101477A1
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loop filter
adaptive loop
methods
devices
cross
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French (fr)
Inventor
Changyue MA
Xiaoyu XIU
Che-Wei Kuo
Wei Chen
Hong-Jheng Jhu
Ning Yan
Xianglin Wang
Qi Huang
Bing Yu
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Beijing Dajia Internet Information Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
    • H04N19/117—Filters, e.g. for pre-processing or post-processing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
    • H04N19/136—Incoming video signal characteristics or properties
    • H04N19/14—Coding unit complexity, e.g. amount of activity or edge presence estimation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding 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
    • H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding 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 the unit being an image region, e.g. an object
    • H04N19/176—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding 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 the unit being an image region, e.g. an object the region being a block, e.g. a macroblock
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding 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
    • H04N19/186—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding 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 the unit being a colour or a chrominance component
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/80—Details of filtering operations specially adapted for video compression, e.g. for pixel interpolation
    • H04N19/82—Details of filtering operations specially adapted for video compression, e.g. for pixel interpolation involving filtering within a prediction loop

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Liquid Crystal Substances (AREA)

Abstract

Methods and apparatus are provided for video decoding/encoding. In a method provided, a decoder may obtain an adaptive loop filter (ALF) classifier for a sub-block, determine an ALF based on the ALF classifier, and obtain a filtered sample of a chroma sample in the sub-block based on the ALF and a reconstructed sample of the chroma sample.

Description

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Claims

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PCT/US2024/054502 2023-11-06 2024-11-05 Methods and devices for adaptive loop filter and cross- component adaptive loop filter Pending WO2025101477A1 (en)

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Citations (5)

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WO2021083257A1 (en) * 2019-10-29 2021-05-06 Beijing Bytedance Network Technology Co., Ltd. Cross-component adaptive loop filter
US20230101318A1 (en) * 2021-09-29 2023-03-30 Qualcomm Incorporated Edge offset for cross component sample adaptive offset (ccsao) filter
US20230269371A1 (en) * 2019-07-08 2023-08-24 Lg Electronics Inc. In-loop filtering-based video or image coding
WO2023200966A1 (en) * 2022-04-13 2023-10-19 Beijing Dajia Internet Information Technology Co., Ltd Method and apparatus for cross-component prediction for video coding
US20230353790A1 (en) * 2019-08-08 2023-11-02 Panasonic Intellectual Property Corporation Of America System and method for video coding

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230269371A1 (en) * 2019-07-08 2023-08-24 Lg Electronics Inc. In-loop filtering-based video or image coding
US20230353790A1 (en) * 2019-08-08 2023-11-02 Panasonic Intellectual Property Corporation Of America System and method for video coding
WO2021083257A1 (en) * 2019-10-29 2021-05-06 Beijing Bytedance Network Technology Co., Ltd. Cross-component adaptive loop filter
US20230101318A1 (en) * 2021-09-29 2023-03-30 Qualcomm Incorporated Edge offset for cross component sample adaptive offset (ccsao) filter
WO2023200966A1 (en) * 2022-04-13 2023-10-19 Beijing Dajia Internet Information Technology Co., Ltd Method and apparatus for cross-component prediction for video coding

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