WO2009044549A1 - ブロック歪みを減少させる方法および装置 - Google Patents

ブロック歪みを減少させる方法および装置 Download PDF

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Publication number
WO2009044549A1
WO2009044549A1 PCT/JP2008/002770 JP2008002770W WO2009044549A1 WO 2009044549 A1 WO2009044549 A1 WO 2009044549A1 JP 2008002770 W JP2008002770 W JP 2008002770W WO 2009044549 A1 WO2009044549 A1 WO 2009044549A1
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WIPO (PCT)
Prior art keywords
block boundary
vicinity
pixels
values
adjusted
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Ceased
Application number
PCT/JP2008/002770
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English (en)
French (fr)
Inventor
Chih Jung Lin
Pei Lin Hou
Satoshi Kondo
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Panasonic Corp
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Panasonic Corp
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Filing date
Publication date
Application filed by Panasonic Corp filed Critical Panasonic Corp
Priority to EP08835734A priority Critical patent/EP2197214A4/en
Priority to US12/515,802 priority patent/US8331717B2/en
Priority to JP2009513501A priority patent/JP5014423B2/ja
Priority to CN2008800012590A priority patent/CN101569199B/zh
Publication of WO2009044549A1 publication Critical patent/WO2009044549A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H04N19/117—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
    • H04N19/136—Incoming video signal characteristics or properties
    • H04N19/14—Coding unit complexity, e.g. amount of activity or edge presence estimation
    • 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
    • H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform 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
    • H04N19/60—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
    • H04N19/80—Details of filtering operations specially adapted for video compression, e.g. for pixel interpolation
    • 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
    • H04N19/86—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression involving reduction of coding artifacts, e.g. of blockiness

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Image Processing (AREA)
  • Compression Of Band Width Or Redundancy In Fax (AREA)
  • Picture Signal Circuits (AREA)

Abstract

　ブロック境界線における歪みを除去するが、オリジナル画像の輪郭線がブロック境界線と一致した場合は歪みの除去程度を調整し、画質を向上させる。適応フィルタは、高域通過フィルタによりブロック境界近傍の画素の重みを計算するステップと、その重みによりブロック境界近傍の画素に関する調整された値を決定するステップとからなる。ブロック境界近傍の画素値は調整され、ブロック歪みを除去する。低域通過フィルタが、フィルタ処理された値を決定するためブロック境界近傍の画素に適用される。ブロック境界近傍の画素に関する調整された値は、元の画素値とフィルタ値との加重和を求めることにより決定される。高域通過フィルタはブロック境界近傍の画素の鮮明度を認識し、低域通過フィルタはブロック境界近傍の画素間の差異を減少させるため、適応フィルタは調整された値を出力し、この値はブロック歪みを除去し、画像の鮮明度を保持する。
PCT/JP2008/002770 2007-10-03 2008-10-02 ブロック歪みを減少させる方法および装置 Ceased WO2009044549A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP08835734A EP2197214A4 (en) 2007-10-03 2008-10-02 METHOD AND DEVICE FOR REDUCING BLOCK DAMAGE
US12/515,802 US8331717B2 (en) 2007-10-03 2008-10-02 Method and apparatus for reducing block noise
JP2009513501A JP5014423B2 (ja) 2007-10-03 2008-10-02 ブロック歪みを減少させる方法および装置
CN2008800012590A CN101569199B (zh) 2007-10-03 2008-10-02 减少块状噪声的方法及装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-259475 2007-10-03
JP2007259475 2007-10-03

Publications (1)

Publication Number Publication Date
WO2009044549A1 true WO2009044549A1 (ja) 2009-04-09

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/002770 Ceased WO2009044549A1 (ja) 2007-10-03 2008-10-02 ブロック歪みを減少させる方法および装置

Country Status (5)

Country Link
US (1) US8331717B2 (ja)
EP (1) EP2197214A4 (ja)
JP (1) JP5014423B2 (ja)
CN (1) CN101569199B (ja)
WO (1) WO2009044549A1 (ja)

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JPWO2009037817A1 (ja) * 2007-09-19 2011-01-06 パナソニック株式会社 輪郭補正装置、輪郭補正方法、映像表示装置
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JP4703759B2 (ja) * 2009-11-27 2011-06-15 株式会社東芝 画像処理装置および同装置における画像処理方法
EP2599311B1 (en) 2010-07-28 2020-02-05 Synaptics Incorporated Block compression artifact detection in digital video signals
CN103049886B (zh) * 2011-10-12 2015-10-28 方正国际软件(北京)有限公司 一种图像纹理修复方法及系统
JP5971089B2 (ja) * 2012-11-14 2016-08-17 富士通株式会社 生体情報補正装置、生体情報補正方法及び生体情報補正用コンピュータプログラム
KR20140086632A (ko) * 2012-12-28 2014-07-08 삼성디스플레이 주식회사 영상 처리 장치 및 그것을 포함하는 표시 장치
US20140192266A1 (en) * 2013-01-04 2014-07-10 Qualcomm Incorporated Method and apparatus of reducing compression noise in digital video streams
TWI596573B (zh) * 2013-04-25 2017-08-21 財團法人工業技術研究院 影像處理裝置及其影像雜訊抑制方法
US10212006B2 (en) * 2016-03-01 2019-02-19 Mediatek Inc. Feed-forward filtering device and associated method
JP6964780B2 (ja) * 2017-12-29 2021-11-10 テレフオンアクチーボラゲット エルエム エリクソン（パブル） 参照値と関係するデバイスとを使用するビデオの符号化および／または復号を行う方法
JP7026065B2 (ja) * 2019-03-12 2022-02-25 Kddi株式会社 画像復号装置、画像復号方法及びプログラム
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See also references of EP2197214A4

Also Published As

Publication number Publication date
US20100061649A1 (en) 2010-03-11
EP2197214A4 (en) 2010-12-29
JPWO2009044549A1 (ja) 2011-02-03
CN101569199B (zh) 2012-06-27
EP2197214A1 (en) 2010-06-16
CN101569199A (zh) 2009-10-28
US8331717B2 (en) 2012-12-11
JP5014423B2 (ja) 2012-08-29

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