CN114830659A - 变换方法、编码器、解码器以及存储介质 - Google Patents

变换方法、编码器、解码器以及存储介质 Download PDF

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Publication number
CN114830659A
CN114830659A CN201980103082.3A CN201980103082A CN114830659A CN 114830659 A CN114830659 A CN 114830659A CN 201980103082 A CN201980103082 A CN 201980103082A CN 114830659 A CN114830659 A CN 114830659A
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China
Prior art keywords
lfnst
mip
current block
value
coefficient
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Pending
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CN201980103082.3A
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English (en)
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霍俊彦
李新伟
乔文涵
马彦卓
万帅
杨付正
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Publication of CN114830659A publication Critical patent/CN114830659A/zh
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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
    • H04N19/134—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
    • H04N19/157—Assigned coding mode, i.e. the coding mode being predefined or preselected to be further used for selection of another element or parameter
    • H04N19/159—Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
    • 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
    • H04N19/12—Selection from among a plurality of transforms or standards, e.g. selection between discrete cosine transform [DCT] and sub-band transform or selection between H.263 and H.264
    • H04N19/122—Selection of transform size, e.g. 8x8 or 2x4x8 DCT; Selection of sub-band transforms of varying structure or type
    • 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
    • H04N19/129—Scanning of coding units, e.g. zig-zag scan of transform coefficients or flexible macroblock ordering [FMO]
    • 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
    • H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
    • H04N19/593—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving spatial prediction techniques
    • 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
    • H04N19/85—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression
    • H04N19/88—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression involving rearrangement of data among different coding units, e.g. shuffling, interleaving, scrambling or permutation of pixel data or permutation of transform coefficient data among different blocks

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Discrete Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

本申请实施例公开了一种变换方法、编码器、解码器以及存储介质，该方法包括：确定当前块的预测模式参数；当所述预测模式参数指示所述当前块使用基于矩阵的帧内预测MIP确定帧内预测值时，确定MIP参数；根据MIP参数，确定当前块的帧内预测值，计算当前块与所述帧内预测值之间的预测差值；对预测差值进行第一次变换，得到第一系数矩阵；当所述当前块使用低频不可分离二次变换LFNST时，根据所述MIP参数，确定当前块使用的LFNST系数扫描顺序；根据LFNST系数扫描顺序，使用第一系数矩阵构造LFNST的输入系数矩阵；对输入系数矩阵进行LFNST处理，得到当前块的变换系数矩阵；其中，第一次变换是不同于LFNST的变换，LFNST系数扫描顺序包括水平扫描顺序和垂直扫描顺序。

Description

PCT国内申请，说明书已公开。

Claims (29)

  1. PCT国内申请，权利要求书已公开。
CN201980103082.3A 2019-12-30 2019-12-30 变换方法、编码器、解码器以及存储介质 Pending CN114830659A (zh)

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PCT/CN2019/130127 WO2021134303A1 (zh) 2019-12-30 2019-12-30 变换方法、编码器、解码器以及存储介质

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CN114830659A true CN114830659A (zh) 2022-07-29

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US (1) US20220329809A1 (zh)
EP (1) EP4109898A4 (zh)
CN (1) CN114830659A (zh)
WO (1) WO2021134303A1 (zh)

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US11218728B2 (en) * 2019-06-04 2022-01-04 Tencent America LLC Method and apparatus for video coding

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* Cited by examiner, † Cited by third party
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US10491922B2 (en) * 2015-09-29 2019-11-26 Qualcomm Incorporated Non-separable secondary transform for video coding
CA3019490A1 (en) * 2016-05-13 2017-11-16 Sony Corporation Image processing apparatus and method
CN118214877A (zh) * 2016-11-28 2024-06-18 韩国电子通信研究院 对图像编码/解码的方法和设备及存储比特流的记录介质
US11019355B2 (en) * 2018-04-03 2021-05-25 Electronics And Telecommunications Research Institute Inter-prediction method and apparatus using reference frame generated based on deep learning

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EP4109898A1 (en) 2022-12-28
WO2021134303A1 (zh) 2021-07-08
EP4109898A4 (en) 2023-01-11
US20220329809A1 (en) 2022-10-13

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