EP2625859A1 - Procédé et appareil de filtrage de boucle adaptatif à base de région - Google Patents

Procédé et appareil de filtrage de boucle adaptatif à base de région

Info

Publication number
EP2625859A1
EP2625859A1 EP11830225.6A EP11830225A EP2625859A1 EP 2625859 A1 EP2625859 A1 EP 2625859A1 EP 11830225 A EP11830225 A EP 11830225A EP 2625859 A1 EP2625859 A1 EP 2625859A1
Authority
EP
European Patent Office
Prior art keywords
alf
region
design
regions
filter
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.)
Withdrawn
Application number
EP11830225.6A
Other languages
German (de)
English (en)
Other versions
EP2625859A4 (fr
Inventor
Ching-Yeh Chen
Chih-Ming Fu
Chia-Yang Tsai
Yu-Wen Huang
Shaw-Min Lei
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.)
HFI Innovation Inc
Original Assignee
MediaTek 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
Priority claimed from US13/093,068 external-priority patent/US9094658B2/en
Priority claimed from US13/158,427 external-priority patent/US9055305B2/en
Priority claimed from US13/177,343 external-priority patent/US8861617B2/en
Application filed by MediaTek Inc filed Critical MediaTek Inc
Publication of EP2625859A1 publication Critical patent/EP2625859A1/fr
Publication of EP2625859A4 publication Critical patent/EP2625859A4/fr
Withdrawn legal-status Critical Current

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
    • H04N19/169—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
    • H04N19/80—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
    • 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
    • H04N19/146—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
    • H04N19/134—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
    • H04N19/156—Availability of hardware or computational resources, e.g. encoding based on power-saving 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
    • 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
    • H04N19/182—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 pixel
    • 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
    • H04N19/19—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 using optimisation based on Lagrange multipliers
    • 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
    • H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
    • H04N19/61—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive 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
    • H04N19/70—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
    • 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

Definitions

  • QC ALF Another ALF scheme (called QC ALF) was proposed by Qualcomm ("Video coding technology proposal by Qualcomm Inc.”, Karczewicz et al, Joint Collaborative Team on Video Coding (JCT-VC) of ITU-T SG16 WP3 and ISO/IEC JTC1/SC29/WG11, 1st Meeting: Dresden, DE, 15-23 April, 2010, Document: JCTVC-A121.
  • the ALF is applied to the deblocked video data on a block by block basis.
  • SLM Sum-modified Laplacian Measure
  • Fig. 1 illustrates an exemplary block diagram of a video coding system based on motion compensated prediction, where adaptive loop filter is applied to reconstructed video data.
  • Fig. 5 illustrates the scanning order through the 4x4 regions according to the deformed Hilbert curve.
  • Fig. 9 illustrates the scanning order through the 4x4 regions according to the spiral scan.
  • Fig. 11 illustrates the scanning order through the 4x4 regions according to the raster scan.
  • Fig. 12 illustrates an example of region splitting, where a region is split into five regions, i.e., Fo, Fi, F 2 , F 3 and a No-Filter region.
  • Fig. 13 illustrates an example where the five to-be-filtered regions are merged into three regions, Fo', and F and a No-Filter region.
  • the set of ALF filters may be pre-defined and the filter selection can be indicated by an index.
  • the filter can be derived in a time-delayed arrangement based on video data already reconstructed. Therefore, no side information or very little side information is needed.
  • Other means for reducing information associated with the filter can be used such as entropy coding of the filter coefficients and/or transmitting the coefficients differentially.
  • FIG. 1 illustrates a system block diagram 100 of motion- compensated video encoder with deblocking.
  • Compression system 100 illustrates a typical video encoder incorporating Intra/Inter-prediction, Discrete Cosine Transform (DCT) and entropy coding to generate compressed video data.
  • the input video data enters the encoder through input interface 112 and the input video data is predicted using Intra/Inter-prediction 110.
  • Intra prediction mode the incoming video data are predicted by surrounding data in the same frame picture or field picture that are already coded.

Abstract

Dans un système à compensation de mouvement à base de bloc, des bruits de codage peuvent apparaître en raison d'opérations avec pertes. Le filtrage de boucle adaptatif (ALF) est une technique utilisée pour améliorer la qualité. Un procédé ALF adaptatif aux pixels (PA) a été développé qui utilise la mesure de laplacien à somme modifiée (SLM) pour classifier des pixels et applique un filtre ALF respectif à chaque pixel en fonction de la SLM. Bien que l'ALF PA atteigne de meilleures performances qu'un ALF à base de filtre unique (SF) classique, l'ALF PA est source d'une plus grande complexité et consomme plus de puissance en raison de la forte complexité et d'une commutation de filtre pixel par pixel. En conséquence, l'invention porte sur une technique ALF à base de région qui permet une sélection de filtre adaptatif région par région et ne requiert pas de commutation de filtre pixel par pixel. Dans un mode de réalisation selon la présente invention, une image est divisée en MxN régions. L'ALF à base de région permet également une fusion de régions pour les MxN régions afin d'améliorer les performances. Selon un autre aspect de la présente invention, la conception ALF optimale prend également en considération la complexité du système par utilisation d'une optimisation débit-distorsion-complexité (RDCO). La technique RDCO est également appliquée à une conception de décalage adaptatif aux échantillons (SAO).
EP11830225.6A 2010-10-05 2011-09-30 Procédé et appareil de filtrage de boucle adaptatif à base de région Withdrawn EP2625859A4 (fr)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
US39006810P 2010-10-05 2010-10-05
US42172910P 2010-12-10 2010-12-10
US201161429313P 2011-01-03 2011-01-03
US201161454829P 2011-03-21 2011-03-21
US13/093,068 US9094658B2 (en) 2010-05-10 2011-04-25 Method and apparatus of adaptive loop filtering
US13/158,427 US9055305B2 (en) 2011-01-09 2011-06-12 Apparatus and method of sample adaptive offset for video coding
US13/177,343 US8861617B2 (en) 2010-10-05 2011-07-06 Method and apparatus of region-based adaptive loop filtering
PCT/CN2011/080408 WO2012045269A1 (fr) 2010-10-05 2011-09-30 Procédé et appareil de filtrage de boucle adaptatif à base de région

Publications (2)

Publication Number Publication Date
EP2625859A1 true EP2625859A1 (fr) 2013-08-14
EP2625859A4 EP2625859A4 (fr) 2016-03-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP11830225.6A Withdrawn EP2625859A4 (fr) 2010-10-05 2011-09-30 Procédé et appareil de filtrage de boucle adaptatif à base de région

Country Status (5)

Country Link
EP (1) EP2625859A4 (fr)
KR (1) KR101526349B1 (fr)
CN (3) CN106878729B (fr)
CA (1) CA2805722C (fr)
WO (1) WO2012045269A1 (fr)

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Publication number Publication date
EP2625859A4 (fr) 2016-03-02
CN103155557A (zh) 2013-06-12
CA2805722C (fr) 2016-03-29
CN103155557B (zh) 2017-03-01
KR101526349B1 (ko) 2015-06-05
CN107087180A (zh) 2017-08-22
CN106878729A (zh) 2017-06-20
CA2805722A1 (fr) 2012-04-12
CN107087180B (zh) 2019-10-29
KR20130030294A (ko) 2013-03-26
WO2012045269A1 (fr) 2012-04-12
CN106878729B (zh) 2019-09-24

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