WO2012140889A1 - Image encoding apparatus, image encoding method, image encoding program, image decoding apparatus, image decoding method, and image decoding program - Google Patents

Image encoding apparatus, image encoding method, image encoding program, image decoding apparatus, image decoding method, and image decoding program Download PDF

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Publication number
WO2012140889A1
WO2012140889A1 PCT/JP2012/002525 JP2012002525W WO2012140889A1 WO 2012140889 A1 WO2012140889 A1 WO 2012140889A1 JP 2012002525 W JP2012002525 W JP 2012002525W WO 2012140889 A1 WO2012140889 A1 WO 2012140889A1
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WO
WIPO (PCT)
Prior art keywords
block
quantization parameter
sub
unit
encoding
Prior art date
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Ceased
Application number
PCT/JP2012/002525
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English (en)
French (fr)
Inventor
Mitsuru Maeda
Masato Shima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
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Canon Inc
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Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Publication of WO2012140889A1 publication Critical patent/WO2012140889A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H04N19/46—Embedding additional information in the video signal during the compression process
    • H04N19/463—Embedding additional information in the video signal during the compression process by compressing encoding parameters before transmission
    • 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
    • H04N19/189—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the adaptation method, adaptation tool or adaptation type used for the adaptive coding
    • H04N19/196—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the adaptation method, adaptation tool or adaptation type used for the adaptive coding being specially adapted for the computation of encoding parameters, e.g. by averaging previously computed encoding parameters
    • 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
    • H04N19/70—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by syntax aspects related to video coding, e.g. related to compression standards

Definitions

  • An LCU is further divided into small sub-blocks, that is, coding units (CUs) to be subjected to, for example, transform and quantization.
  • a quadtree partition structure is adopted.
  • a region is divided into two in the vertical direction and is divided into two in the horizontal direction.
  • Fig. 2A illustrates a quadtree partition structure.
  • a basic block 1000 is indicated by a bold line.
  • the basic block 1000 has a size of 64 pixels by 64 pixels.
  • Sub-blocks 1001 and 1010 of the basic block 1000 have a size of 32 pixels by 32 pixels.
  • Sub-blocks 1002 to 1009 of the basic block 1000 have a size of 16 pixels by 16 pixels. In this way, an LCU is divided into smaller blocks, and an ending process including transform is performed on each of the sub-blocks.
  • moving image data is received on a frame basis.
  • still image data for one frame may be received.
  • a terminal 1100 receives an encoded bit stream.
  • a decoding/separating unit 1101 decodes the header information of the bit stream and separates necessary code from the bit stream. Thereafter, the decoding/separating unit 1101 outputs the code to a unit disposed downstream thereof.
  • the decoding/separating unit 1101 performs an operation that is the reverse of the operation performed by the code integrating unit 11009.
  • a selection flag decoding unit 1109 decodes the qp_delta_select_flag code 20005 and reproduces the selection flag.
  • a quantization parameter decoding unit 1102 decodes the encoded data of the quantization parameter.
  • a block decoding unit 1103 decodes the quantization coefficient code of each of the sub-blocks and reproduces a quantization coefficient.
  • the division information (the split_coding_flag code 20010) is decoded by the decoding/separating unit 1101 on a basic block basis and is input to the quantization parameter decoding unit 1102. Subsequently, for each of the sub-blocks, the quantization parameter difference value code (the cu_qp_delta code) of the sub-block is input to the quantization parameter decoding unit 1102.
  • a sub-block quantization parameter addition unit 104 sums the prediction value of the determined sub-block quantization parameter and the sub-block quantization parameter difference value and reproduces the sub-block quantization parameter.
  • a terminal 105 outputs the reproduced sub-block quantization parameter to the block inverse quantization unit 1104 illustrated in Fig. 6.
  • the quantization parameter prediction value determination unit 108 determines, as the prediction value, the quantization parameter of a sub-block decoded in the decoding order of a block stored in the quantization parameter storage unit 106.
  • step S106 of the second exemplary embodiment illustrated in Fig. 8 if a referenceable sub-block is not present on the left of the sub-block to be decoded, prediction is performed in the decoding order.
  • steps S301, S105, and S302 illustrated in Fig. 12 may be performed instead of step S106.
  • Fig. 21 is a flowchart of the image encoding process performed by the image encoding apparatus according to the seventh exemplary embodiment. As illustrated in Fig. 21, the flowchart differs from that of the fifth exemplary embodiment illustrated in Fig. 15 in that steps S001, S003, and S403 are eliminated.
  • prediction of a quantization parameter can be adaptively changed by referencing the encoding mode of, for example, a slice that allows the difference value of each of the sub-block quantization parameters to be encoded.
  • the decoding apparatus can decode a bit stream providing a decrease in a delay of the processing time and an increase in the quality of an image.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computing Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
PCT/JP2012/002525 2011-04-15 2012-04-12 Image encoding apparatus, image encoding method, image encoding program, image decoding apparatus, image decoding method, and image decoding program Ceased WO2012140889A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-091346 2011-04-15
JP2011091346A JP6039163B2 (ja) 2011-04-15 2011-04-15 画像符号化装置、画像符号化方法及びプログラム、画像復号装置、画像復号方法及びプログラム

Publications (1)

Publication Number Publication Date
WO2012140889A1 true WO2012140889A1 (en) 2012-10-18

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WO (1) WO2012140889A1 (https=)

Cited By (1)

* Cited by examiner, † Cited by third party
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CN111937395A (zh) * 2018-04-01 2020-11-13 金起佰 用于编码/解码图像的方法和装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120016980A (ko) 2010-08-17 2012-02-27 한국전자통신연구원 영상 부호화 방법 및 장치, 그리고 복호화 방법 및 장치

Citations (4)

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WO2008126135A1 (ja) * 2007-03-20 2008-10-23 Fujitsu Limited 動画像符号化方法及び装置並びに動画像復号装置
JP2009531999A (ja) * 2006-03-29 2009-09-03 クゥアルコム・インコーポレイテッド スケーラビリティを有する映像処理
WO2009158113A2 (en) * 2008-06-03 2009-12-30 Microsoft Corporation Adaptive quantization for enhancement layer video coding
JP2010035146A (ja) * 2008-07-02 2010-02-12 Canon Inc 符号化装置および符号化方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009531999A (ja) * 2006-03-29 2009-09-03 クゥアルコム・インコーポレイテッド スケーラビリティを有する映像処理
WO2008126135A1 (ja) * 2007-03-20 2008-10-23 Fujitsu Limited 動画像符号化方法及び装置並びに動画像復号装置
WO2009158113A2 (en) * 2008-06-03 2009-12-30 Microsoft Corporation Adaptive quantization for enhancement layer video coding
JP2010035146A (ja) * 2008-07-02 2010-02-12 Canon Inc 符号化装置および符号化方法

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111937395A (zh) * 2018-04-01 2020-11-13 金起佰 用于编码/解码图像的方法和装置
EP3780620A4 (en) * 2018-04-01 2022-01-26 B1 Institute of Image Technology, Inc. METHODS AND APPARATUS FOR IMAGE ENCODING/DECODING
US11297309B2 (en) 2018-04-01 2022-04-05 B1 Institute Of Image Technology, Inc. Method and apparatus for encoding/decoding image
CN117692637A (zh) * 2018-04-01 2024-03-12 有限公司B1影像技术研究所 图像编码/解码方法、介质和传送比特流的方法
CN111937395B (zh) * 2018-04-01 2024-05-17 有限公司B1影像技术研究所 用于编码/解码图像的方法和装置
US12075026B2 (en) 2018-04-01 2024-08-27 B1 Institute Of Image Technology, Inc. Method and apparatus for encoding/decoding image
EP4443878A3 (en) * 2018-04-01 2024-12-18 B1 Institute of Image Technology, Inc. Method and apparatus for encoding/decoding image
AU2024205220B2 (en) * 2018-04-01 2026-02-12 B1 Institute Of Image Technology, Inc. Method and apparatus for encoding/decoding image
US12574496B2 (en) 2018-04-01 2026-03-10 B1 Institute Of Image Technology, Inc. Method and apparatus for encoding/decoding image
US12574495B2 (en) 2018-04-01 2026-03-10 B1 Institute Of Image Technology, Inc. Method and apparatus for encoding/decoding image
US12574497B2 (en) 2018-04-01 2026-03-10 B1 Institute Of Image Technology, Inc. Method and apparatus for encoding/decoding image
US12574498B2 (en) 2018-04-01 2026-03-10 B1 Institute Of Image Technology, Inc. Method and apparatus for encoding/decoding image
US12581056B2 (en) 2018-04-01 2026-03-17 B1 Institute Of Image Technology, Inc. Method and apparatus for encoding/decoding image
US12598289B2 (en) 2018-04-01 2026-04-07 B1 Institute Of Image Technology, Inc. Method and apparatus for encoding/decoding image

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JP2012227612A (ja) 2012-11-15
JP6039163B2 (ja) 2016-12-07

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