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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WO
WIPO (PCT)
Prior art keywords
block boundary
vicinity
pixels
values
adjusted
Prior art date
Application number
PCT/JP2008/002770
Other languages
English (en)
French (fr)
Inventor
Chih Jung Lin
Pei Lin Hou
Satoshi Kondo
Original Assignee
Panasonic Corporation
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 Panasonic Corporation filed Critical Panasonic Corporation
Priority to US12/515,802 priority Critical patent/US8331717B2/en
Priority to JP2009513501A priority patent/JP5014423B2/ja
Priority to EP08835734A priority patent/EP2197214A4/en
Priority to CN2008800012590A priority patent/CN101569199B/zh
Publication of WO2009044549A1 publication Critical patent/WO2009044549A1/ja

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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
    • H04N19/10—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)
  • Picture Signal Circuits (AREA)
  • Compression Of Band Width Or Redundancy In Fax (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 WO2009044549A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
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
EP08835734A EP2197214A4 (en) 2007-10-03 2008-10-02 METHOD AND DEVICE FOR REDUCING BLOCK DEFORMATION
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
JP2007259475 2007-10-03
JP2007-259475 2007-10-03

Publications (1)

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

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/002770 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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Also Published As

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

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