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GB201207176D0 - Methods of encoding and decoding an image, and corresponding devices - Google Patents

Methods of encoding and decoding an image, and corresponding devices

Info

Publication number
GB201207176D0
GB201207176D0 GBGB1207176.7A GB201207176A GB201207176D0 GB 201207176 D0 GB201207176 D0 GB 201207176D0 GB 201207176 A GB201207176 A GB 201207176A GB 201207176 D0 GB201207176 D0 GB 201207176D0
Authority
GB
United Kingdom
Prior art keywords
encoding
original
coding unit
prediction
residual
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
GBGB1207176.7A
Other versions
GB2501493B (en
GB2501493A (en
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
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to GB201207176A priority Critical patent/GB2501493B/en
Publication of GB201207176D0 publication Critical patent/GB201207176D0/en
Publication of GB2501493A publication Critical patent/GB2501493A/en
Application granted granted Critical
Publication of GB2501493B publication Critical patent/GB2501493B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • H04N19/124—Quantisation
    • 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
    • H04N19/124—Quantisation
    • H04N19/126—Details of normalisation or weighting functions, e.g. normalisation matrices or variable uniform quantisers
    • 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
    • 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
    • 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
    • H04N19/192—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 the adaptation method, adaptation tool or adaptation type being iterative or recursive
    • H04N19/194—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 the adaptation method, adaptation tool or adaptation type being iterative or recursive involving only two passes

Landscapes

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

Abstract

An original encoding method for a unit of pixels of an original image signal (101) is a two-stage probabilistic coding mode. The mode provides a first prediction-based encoding of an original coding unit to obtain a pre-coded coding unit, where the pre-coded coding unit comprises a prediction residual quantized in a frequency domain using predefined quantizers. The mode also provides a second encoding of a quantization residual resulting from the difference between the original coding unit and a decoded version of the obtained pre-coded coding unit. The second encoding includes quantizing in the frequency domain the quantization residual using quantizers selected based on statistics depending on the original image signal (101). A preliminary prediction-based encoding of at least one original encoding unit may be carried out, to generate a preliminary quantization residual from which statistics are obtained. The preliminary prediction-based encoding may involve competing between static coding modes to obtain segmentation of a preliminary prediction residual frame portion, where the static coding modes use pre-defined quantizers based on one quantization offset.
GB201207176A 2012-04-24 2012-04-24 Methods for encoding and decoding an image, and corresponding devices Expired - Fee Related GB2501493B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB201207176A GB2501493B (en) 2012-04-24 2012-04-24 Methods for encoding and decoding an image, and corresponding devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB201207176A GB2501493B (en) 2012-04-24 2012-04-24 Methods for encoding and decoding an image, and corresponding devices

Publications (3)

Publication Number Publication Date
GB201207176D0 true GB201207176D0 (en) 2012-06-06
GB2501493A GB2501493A (en) 2013-10-30
GB2501493B GB2501493B (en) 2015-05-13

Family

ID=46261789

Family Applications (1)

Application Number Title Priority Date Filing Date
GB201207176A Expired - Fee Related GB2501493B (en) 2012-04-24 2012-04-24 Methods for encoding and decoding an image, and corresponding devices

Country Status (1)

Country Link
GB (1) GB2501493B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3306922A1 (en) * 2016-10-05 2018-04-11 Thomson Licensing Method and apparatus for encoding a picture using rate-distortion based block splitting
US11381819B2 (en) * 2019-07-05 2022-07-05 Qualcomm Incorporated Chroma delta quantization parameter (QP) in video coding

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090225829A2 (en) * 2005-07-06 2009-09-10 Do-Kyoung Kwon Method and apparatus for operational frame-layerrate control in video encoder
US7876819B2 (en) * 2005-09-22 2011-01-25 Qualcomm Incorporated Two pass rate control techniques for video coding using rate-distortion characteristics

Also Published As

Publication number Publication date
GB2501493B (en) 2015-05-13
GB2501493A (en) 2013-10-30

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20170424