KR100708202B1 - 블록킹 효과를 제거하기 위한 필터링 방법 - Google Patents
블록킹 효과를 제거하기 위한 필터링 방법 Download PDFInfo
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- KR100708202B1 KR100708202B1 KR1020060016669A KR20060016669A KR100708202B1 KR 100708202 B1 KR100708202 B1 KR 100708202B1 KR 1020060016669 A KR1020060016669 A KR 1020060016669A KR 20060016669 A KR20060016669 A KR 20060016669A KR 100708202 B1 KR100708202 B1 KR 100708202B1
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- 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
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T5/00—Image enhancement or restoration
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- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
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- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
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- 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
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- 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
- H04N19/137—Motion inside a coding unit, e.g. average field, frame or block difference
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- H04N19/136—Incoming video signal characteristics or properties
- H04N19/14—Coding unit complexity, e.g. amount of activity or edge presence estimation
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- 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
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- 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
- H04N19/18—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 set of transform coefficients
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- 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
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- H04N19/625—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding using discrete cosine transform [DCT]
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- 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
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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
- H04N19/85—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
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- H—ELECTRICITY
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- 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
- H04N19/89—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression involving methods or arrangements for detection of transmission errors at the decoder
- H04N19/895—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression involving methods or arrangements for detection of transmission errors at the decoder in combination with error concealment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
- H04N5/213—Circuitry for suppressing or minimising impulsive noise
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
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- Computer Vision & Pattern Recognition (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
Abstract
Description
Info[0] = WEAK; if( (RF of current block ==0) && (RF of left block ==0) ) { if( HBF of current block ==1 ) Info[0] = STRONG; else Info[0] = WEAK; if( HBF of left block ==1 ) Info[1] = STRONG; else Info[1] = WEAK; } Let PtrImage[0] be the left-top pixel of current 4x4 block and width be the picture width. if (Info[0]==STRONG && Info[1]==STRONG) { for(m=0; m<4; m++) { o[0]=PtrImg[-4]; o[1]=PtrImg[-3]; o[2]=PtrImg[-2]; o[3]=PtrImg[-1]; o[4]=PtrImg[0]; o[5]=PtrImg[1]; o[6]=PtrImg[2]; o[7]=PtrImg[3]; PtrImg[-2] = (o[0]+2*o[1]+2*o[2]+2*o[3]+o[4]+4)/8; PtrImg[-1] = (o[1]+2*o[2]+2*o[3]+2*o[4]+o[5]+4)/8; PtrImg[0] = (o[2]+2*o[3]+2*o[4]+2*o[5]+o[6]+4)/8; PtrImg[1] = (o[3]+2*o[4]+2*o[5]+2*o[6]+o[7]+4)/8; PtrImg += width; } /* m end */ } /* STRONG && STRONG */ else { for(m=0; m<4; m++) { d = PtrImg[0] - PtrImg[-1]; if (ABS(d) <= QP){ if (QP >20 ) PtrImg[0]=PtrImg[0]-(d>>3); PtrImg[-1]=PtrImg[-1]+(d>>3); Else PtrImg[0]=PtrImg[0]-(d>>4); PtrImg[-1]=PtrImg[-1]+(d>>4); } PtrImg += width; } /* m end */ } |
Claims (6)
- 인접 블럭과 현재 블럭의 경계 영역에 위치한 픽셀들에 대해 블록킹 효과를 제거하기 위한 필터링 방법에 있어서,상기 인접 블럭의 변환 및 양자화된 계수값들 중 0이 아닌 값이 있는지를 검출하는 단계와,상기 현재 블럭의 변환 및 양자화된 계수값들 중 0이 아닌 값이 있는지를 검출하는 단계와,상기 검출 결과에 따라 필터링 정보를 생성하는 단계와,상기 생성된 필터링 정보를 기초로하여 현재 블럭에 대해 필터링을 수행하는 단계를 포함하는 것을 특징으로 하는 필터링 방법.
- 제1항에 있어서,상기 필터링 정보를 생성하는 단계는 디블럭킹 필터링을 수행할지 또는 수행하지 않을 지를 결정하는 필터링 정보를 생성하는 단계인 것을 특징으로 하는 필터링 방법.
- 제1항에 있어서,상기 필터링 정보를 생성하는 단계는 디블럭킹 필터링을 수행하는 경우에 해당할 때, 디블럭킹 필터링을 수행할 때 결정되는 픽셀 수를 결정하는 필터링 정보를 생성하는 단계임을 특징으로 하는 필터링 방법.
- 제1항에 있어서,상기 변환은 데이터 표현 방식의 변환을 나타내는 것을 특징으로 하는 필터링 방법.
- 제1항에 있어서,상기 변환 및 양자화된 계수 값은4×4 픽셀 블록을 DCT 변환하고 양자화하여 얻어진 4×4 DCT 블록의 계수 값임을 특징으로 하는 필터링 방법.
- 삭제
Applications Claiming Priority (2)
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KR1020020005742 | 2002-01-31 | ||
KR20020005742 | 2002-01-31 |
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KR1020050055898A Division KR100605290B1 (ko) | 2002-01-31 | 2005-06-27 | 블록킹 효과를 제거하기 위한 필터링 방법 |
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KR20060029645A KR20060029645A (ko) | 2006-04-06 |
KR100708202B1 true KR100708202B1 (ko) | 2007-04-16 |
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KR20020052457A Expired - Fee Related KR100584549B1 (ko) | 2002-01-31 | 2002-09-02 | 블록킹 효과를 제거하기 위한 필터링 방법 및 그 장치 |
KR1020050055898A Expired - Fee Related KR100605290B1 (ko) | 2002-01-31 | 2005-06-27 | 블록킹 효과를 제거하기 위한 필터링 방법 |
KR1020060016669A Expired - Fee Related KR100708202B1 (ko) | 2002-01-31 | 2006-02-21 | 블록킹 효과를 제거하기 위한 필터링 방법 |
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KR20020052457A Expired - Fee Related KR100584549B1 (ko) | 2002-01-31 | 2002-09-02 | 블록킹 효과를 제거하기 위한 필터링 방법 및 그 장치 |
KR1020050055898A Expired - Fee Related KR100605290B1 (ko) | 2002-01-31 | 2005-06-27 | 블록킹 효과를 제거하기 위한 필터링 방법 |
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Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1285214C (zh) * | 2004-01-14 | 2006-11-15 | 华中科技大学 | 一种环路滤波方法和环路滤波器 |
KR100683060B1 (ko) * | 2004-12-08 | 2007-02-15 | 한국전자통신연구원 | 영상 프레임의 블록화 현상 제거 장치 및 그 방법 |
KR100679035B1 (ko) | 2005-01-04 | 2007-02-06 | 삼성전자주식회사 | 인트라 bl 모드를 고려한 디블록 필터링 방법, 및 상기방법을 이용하는 다 계층 비디오 인코더/디코더 |
KR100764345B1 (ko) * | 2006-01-18 | 2007-10-08 | 주식회사 어니언텍 | 이동통신망에서의 동영상 화질 개선 방법 및 이를 구현하는장치 |
KR100803132B1 (ko) * | 2006-04-26 | 2008-02-14 | 엘지전자 주식회사 | 웨이브렛 변환을 이용한 엠펙 노이즈 제거 방법 및 장치 |
KR101452495B1 (ko) * | 2008-05-09 | 2014-10-21 | 비반테 코포레이션 | 복원된 비디오 데이터를 위한 디링잉 필터 |
KR101701342B1 (ko) | 2009-08-14 | 2017-02-01 | 삼성전자주식회사 | 적응적인 루프 필터링을 이용한 비디오의 부호화 방법 및 장치, 비디오 복호화 방법 및 장치 |
KR101901660B1 (ko) | 2015-11-25 | 2018-09-28 | 티비엠 주식회사 | 구강 지혈 및 상처 보호 필름 |
Citations (3)
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KR960039996A (ko) * | 1995-04-29 | 1996-11-25 | 김광호 | 영상신호 부호화/복호화장치에 있어서 블럭킹 효과 제거회로 |
KR100237636B1 (ko) * | 1995-11-02 | 2000-01-15 | 구자홍 | 블록킹효과 개선장치 |
KR20000012878A (ko) * | 1998-08-01 | 2000-03-06 | 윤종용 | 영상데이터 루프필터링방법 및 장치 |
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KR100243225B1 (ko) * | 1997-07-16 | 2000-02-01 | 윤종용 | 블록화효과 및 링잉잡음 감소를 위한 신호적응필터링방법 및신호적응필터 |
KR100269125B1 (ko) * | 1997-10-25 | 2000-10-16 | 윤덕용 | 양자화효과감소를위한영상데이터후처리방법및장치 |
KR100331331B1 (ko) * | 1998-11-02 | 2002-05-09 | 윤덕용 | 영상데이터 루프필터링 방법 |
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2002
- 2002-09-02 KR KR20020052457A patent/KR100584549B1/ko not_active Expired - Fee Related
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2005
- 2005-06-27 KR KR1020050055898A patent/KR100605290B1/ko not_active Expired - Fee Related
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2006
- 2006-02-21 KR KR1020060016669A patent/KR100708202B1/ko not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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KR960039996A (ko) * | 1995-04-29 | 1996-11-25 | 김광호 | 영상신호 부호화/복호화장치에 있어서 블럭킹 효과 제거회로 |
KR100237636B1 (ko) * | 1995-11-02 | 2000-01-15 | 구자홍 | 블록킹효과 개선장치 |
KR20000012878A (ko) * | 1998-08-01 | 2000-03-06 | 윤종용 | 영상데이터 루프필터링방법 및 장치 |
Non-Patent Citations (3)
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1002376360000 |
1019960039996 |
1020000012878 |
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KR20060029645A (ko) | 2006-04-06 |
KR20050077497A (ko) | 2005-08-02 |
KR100584549B1 (ko) | 2006-05-30 |
KR100605290B1 (ko) | 2006-07-31 |
KR20030065277A (ko) | 2003-08-06 |
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