WO2015054816A1 - Options côté codeur pour mode de carte d'index de couleurs de base pour codage vidéo et d'image - Google Patents

Options côté codeur pour mode de carte d'index de couleurs de base pour codage vidéo et d'image Download PDF

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Publication number
WO2015054816A1
WO2015054816A1 PCT/CN2013/085180 CN2013085180W WO2015054816A1 WO 2015054816 A1 WO2015054816 A1 WO 2015054816A1 CN 2013085180 W CN2013085180 W CN 2013085180W WO 2015054816 A1 WO2015054816 A1 WO 2015054816A1
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WO
WIPO (PCT)
Prior art keywords
values
index
block
encoder
value
Prior art date
Application number
PCT/CN2013/085180
Other languages
English (en)
Inventor
Bin Li
Feng Wu
Jizheng Xu
Original Assignee
Microsoft Technology Licensing, Llc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Microsoft Technology Licensing, Llc filed Critical Microsoft Technology Licensing, Llc
Priority to PCT/CN2013/085180 priority Critical patent/WO2015054816A1/fr
Publication of WO2015054816A1 publication Critical patent/WO2015054816A1/fr

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T9/00—Image coding
    • 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
    • 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
    • H04N19/146—Data rate or code amount at the encoder output
    • H04N19/147—Data rate or code amount at the encoder output according to rate distortion criteria
    • 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
    • H04N19/90—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals

Definitions

  • Extensions to the HEVC standard e.g., for scalable video coding/decoding, for
  • Figure 4 is a diagram of an example decoder system.
  • Figures 5a and 5b are diagrams illustrating an example video encoder in conjunction with which some described embodiments can be implemented.
  • Figure 28 is a flowchart illustrating a generalized technique for selecting the direction of prediction of index values during encoding in BCIM mode.
  • Figures 2a and 2b show example network environments (201 , 202) that include video encoders (220) and video decoders (270).
  • the encoders (220) and decoders (270) are connected over a network (250) using an appropriate communication protocol.
  • the network (250) can include the Internet or another computer network.
  • An intra prediction module can spatially predict sample values of a current block from neighboring, previously reconstructed sample values.
  • the decoder reconstructs an intra-coded block with index values for base colors among the sample values of the block, using a base color table for the index values and using elements of an index map.
  • Figure 7 shows a block (730) in which sample values s are replaced with corresponding index values n.
  • the process of replacing sample values with index values is lossless.
  • a sample value can be replaced with the index value representing the base color closest to the sample value, if an exact match is not available. This can reduce the size of the base color table (720) but also introduce perceptible distortion.
  • Another approach to handling sample values not represented with index values is described below.
  • the encoder further maps (832) the index values to packed index values (840) for an index map, for example, as described in the next section.
  • the mapping operations (812, 832) in the BCIM mode do not include quantization or transform operations (except for encoding of exception values, in some implementations).
  • the encoder encodes (842) a base color table and elements of the index map, using a coefficient coding syntax structure (890) to signal the packed index values (840) of the index map.
  • the decoder decodes (942) a base color table and, using the coefficient coding syntax structure (990), also decodes (942) elements of an index map. This produces packed index values (940) for the index map.
  • the decoder maps (932) packed index values (940) to index values (930) for the index map, for example, as described in the next section.
  • the encoder maps (912) the index values (930) to spatial-domain values (910) ⁇ e.g., sample values) for a block.
  • the mapping operations (912, 932) in the BCIM mode do not include inverse quantization or inverse transform operations (except for decoding of exception values, in some implementations).
  • the decoder (a) decodes values for an index map from the coefficient coding syntax structure, (b) maps packed index values or packed index residual values to index values, each of the index values representing a base color, and (c) maps the index values to sample values for the block.
  • the encoder maps (1410) a sample value to an index value for a base color.
  • the encoder uses a base color table as described above to map a luma or chroma sample value to an index value.
  • the decoder maps (1520) the index value to a sample value.
  • the decoder uses a base color table as described above to map a luma or chroma index value to a sample value.
  • the decoder determines a packed index value as its packed index residual value XOR the predicted packed index value.
  • the decoder determines an index value as its index residual value XOR its predicted index value. Again, the predicted value can depend on the direction of prediction (e.g., horizontal, vertical, diagonal).
  • the rate-distortion cost can include a rate cost for a base color table, a rate cost for the block (index map) and a distortion cost for the block, with a weighting parameter (e.g., ⁇ ) that is adjustable by the encoder.
  • a weighting parameter e.g., ⁇

Landscapes

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

Abstract

La présente invention concerne des innovations dans l'utilisation du mode de carte d'index de couleurs de base (BCIM) pendant le codage. Par exemple, certaines innovations consistent à paramétrer le nombre de valeurs d'index à attribuer aux couleurs de base pendant le codage. D'autres innovations consistent à déterminer l'opportunité de coder des valeurs échantillons comme valeurs d'index ou valeurs d'exception. D'autres innovations consistent encore à sélectionner le sens de prédiction de valeurs d'index pendant le codage, ou à décider à quel moment séparer un bloc de valeurs d'index en blocs plus petits. En général, ces innovations améliorent l'efficacité de codage du mode BCIM.
PCT/CN2013/085180 2013-10-14 2013-10-14 Options côté codeur pour mode de carte d'index de couleurs de base pour codage vidéo et d'image WO2015054816A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2013/085180 WO2015054816A1 (fr) 2013-10-14 2013-10-14 Options côté codeur pour mode de carte d'index de couleurs de base pour codage vidéo et d'image

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2013/085180 WO2015054816A1 (fr) 2013-10-14 2013-10-14 Options côté codeur pour mode de carte d'index de couleurs de base pour codage vidéo et d'image

Publications (1)

Publication Number Publication Date
WO2015054816A1 true WO2015054816A1 (fr) 2015-04-23

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PCT/CN2013/085180 WO2015054816A1 (fr) 2013-10-14 2013-10-14 Options côté codeur pour mode de carte d'index de couleurs de base pour codage vidéo et d'image

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016202259A1 (fr) * 2015-06-16 2016-12-22 Huawei Technologies Co., Ltd. Techniques de codage avancées pour des extensions de codage de contenus d'écran (scc) pour codage vidéo à haute efficacité (hevc)
CN112291494A (zh) * 2020-10-28 2021-01-29 卓旺(安徽)航空科技产业股份有限公司 基于5g通信的无人机4k视频定向转发系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020168105A1 (en) * 2001-03-28 2002-11-14 Sharp Laboratories Of America, Inc. Method and apparatus for adaptive compression of scanned documents
US20050249283A1 (en) * 2004-05-07 2005-11-10 Canon Kabushiki Kaisha Image coding apparatus and image decoding apparatus and their control methods, and computer program and computer-readable storage medium
CN101816177A (zh) * 2007-09-13 2010-08-25 微软公司 文本图像编码

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020168105A1 (en) * 2001-03-28 2002-11-14 Sharp Laboratories Of America, Inc. Method and apparatus for adaptive compression of scanned documents
US20050249283A1 (en) * 2004-05-07 2005-11-10 Canon Kabushiki Kaisha Image coding apparatus and image decoding apparatus and their control methods, and computer program and computer-readable storage medium
CN101816177A (zh) * 2007-09-13 2010-08-25 微软公司 文本图像编码

Non-Patent Citations (1)

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Title
LAN, CUILING ET AL.: "IEEE TRANSACTIONS ON IMAGE PROCESSING", COMPRESS COMPOUND IMAGES IN H.264/MPGE-4 AVC BY EXPLOITING SPATIAL CORRELATION, vol. 19, no. 4, 30 April 2010 (2010-04-30) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016202259A1 (fr) * 2015-06-16 2016-12-22 Huawei Technologies Co., Ltd. Techniques de codage avancées pour des extensions de codage de contenus d'écran (scc) pour codage vidéo à haute efficacité (hevc)
US10148977B2 (en) 2015-06-16 2018-12-04 Futurewei Technologies, Inc. Advanced coding techniques for high efficiency video coding (HEVC) screen content coding (SCC) extensions
CN112291494A (zh) * 2020-10-28 2021-01-29 卓旺(安徽)航空科技产业股份有限公司 基于5g通信的无人机4k视频定向转发系统
CN112291494B (zh) * 2020-10-28 2022-12-16 卓旺(安徽)航空科技产业股份有限公司 基于5g通信的无人机4k视频定向转发系统

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