JP5384330B2 - 重み付け符号化する方法及びシステム - Google Patents
重み付け符号化する方法及びシステム Download PDFInfo
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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
- H04N19/169—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
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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
- H04N19/115—Selection of the code volume for a coding unit prior to coding
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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
- H04N19/124—Quantisation
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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
- H04N19/124—Quantisation
- H04N19/126—Details of normalisation or weighting functions, e.g. normalisation matrices or variable uniform quantisers
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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
- H04N19/134—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
- H04N19/154—Measured or subjectively estimated visual quality after decoding, e.g. measurement of distortion
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- H—ELECTRICITY
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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
- H04N19/169—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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- 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
- H04N19/177—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 group of pictures [GOP]
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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
- H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
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Description
図6を参照すれば、図6は例証的には、本発明による、変換関数308を生成するための、伝達曲線310、312及び314の作成に使用される3つのヒストグラム302、304及び306を表す。図6では、各ヒストグラム302、304及び306は別々の色に対応し、ヒストグラム302は赤色に対応し、ヒストグラム304は緑色に対応し、ヒストグラム306は青色に対応する。図6の例では、各ヒストグラム302、304及び306は、8個のビン(x軸)を含む。ビンそれぞれは、それぞれのビンに対応する画像又は画像部分における画素値を有する画素の数(y軸上の画素カウント)を含む。図6の例では、ビンは、昇順に画素の輝度レベルと関連付けられる。図6の変換曲線310、312及び314は、LSB(最下位ビット)での変換関数(例えば、LUT)の入力ビデオ・レベル(横座標)を、LSB(最下位ビット)での出力ビデオ・レベル(縦座標)に対してプロットしている。
式(2)
本発明の一実施例では、本願のヒストグラム解析のピクチャ・サイズ(i×j)404よりも小さなスライディング・ウィンドウ402を実現することが可能である。例えば、スライディング・ウィンドウのステップ・サイズが、一画素(番号403で表す)に等しく、2次元で一線(番号405及び407で表す)に等しい場合、結果として、(i−a)×(j−b)値がビン毎に得られる。
Claims (14)
- 画像データを重み付け符号化する方法であって、
前記画像データの他の領域に使用される、より少ないビット深度と比較して、選択された領域を特徴付けるために高ビット深度を使用して、色精度の増加が望まれる前記画像データの選択された領域が符号化されるように前記画像データに適用される対象の非線形変換関数を求める工程を含み、
前記非線形変換関数は、
前記画像データの画素のビット深度による群に画素情報を編成する工程と、
前記群のそれぞれの利得を求める工程であって、前記それぞれの利得が、前記群におけるそれぞれの画素数に依存する工程と、
前記非線形変換関数を前記それぞれの利得に基づいて求める工程とによって求められる方法。 - 請求項1記載の方法であって、前記画像データの前記選択された領域が、量子化アーチファクトが生じる可能性が高い領域を含む方法。
- 請求項1記載の方法であって、
スライディング・ウィンドウを前記画像データに施して、前記群を作成するために前記画像データの部分集合を求める工程を更に含む方法。 - 請求項1記載の方法であって、前記利得を使用して、前記画像データの前記画素の前記選択された領域を重み付けして、前記画像データの前記画素の前記ビット深度を調節する方法。
- 請求項1記載の方法であって、前記非線形変換関数が前記画像データに、前記画像データの前記画素の別々の色について個別のルックアップ・テーブルを有するルックアップ・テーブルを使用して適用される方法。
- 請求項1記載の方法であって、前記画像データの復号化に使用するための逆変換関数を求める工程を更に含む方法。
- 画像データを重み付け符号化するシステムであって、
前記画像データの他の領域に使用される、より少ないビット深度と比較して、選択された領域を特徴付けるために高ビット深度を使用して、色精度の増加が望まれる前記画像データの選択された領域を符号化することが可能であるように前記画像データに適用される対象の非線形変換関数を求めるよう構成された変換装置
であって、
前記変換装置は、
前記画像データの画素のビット深度による群に画素情報を編成するよう構成された解析装置と、
前記編成された画素情報を受け取り、前記群のそれぞれの利得を求めるよう構成された後処理装置であって、前記それぞれの利得が、前記群におけるそれぞれの画素数に依存する後処理装置と、
前記それぞれの利得に基づいて前記非線形変換関数を求めるよう構成された変換生成装置と
を備える変換装置と、
前記画像データを符号化するよう構成された符号化装置とを備えるシステム。 - 請求項7記載のシステムであって、前記非線形変換関数は、対応する利得に基づいて、低ビット深度の第2の信号に前記画像データを変換する変換生成装置とを備えるシステム。
- 請求項7記載のシステムであって、前記解析装置は、前記画素のそれぞれの画素値に基づいてヒストグラムのビンに画素情報を編成するシステム。
- 請求項7記載のシステムであって、前記変換装置は、前記画像データに前記非線形変換関数を適用するためのルックアップ・テーブルを備え、
前記ルックアップ・テーブルは、前記画像データの前記画素の別々の色について個別のルックアップ・テーブルを含むシステム。 - 請求項7記載のシステムであって、逆変換関数を前記画像データに適用するよう構成された逆変換装置を更に備えるシステム。
- 請求項11記載のシステムであって、前記逆変換装置は、前記符号化画像データに前記逆変換関数を適用するためのルックアップ・テーブルを備え、
前記ルックアップ・テーブルは、前記画像データの前記画素の別々の色について個別のルックアップ・テーブルを含むシステム。 - 請求項8記載のシステムであって、前記解析装置は画素情報をスライディング・ウィンドウに基づいて編成し、前記スライディング・ウィンドウは、前記群を作成するために前記画像データの部分集合を求めるシステム。
- 請求項7記載のシステムであって、前記変換装置は、符号化する対象の前記画像データを重み付けするために前記画像データに前記非線形変換関数を適用するシステム。
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PCT/US2006/020423 WO2007139534A1 (en) | 2006-05-25 | 2006-05-25 | Method and system for weighted encoding |
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KR100668324B1 (ko) * | 2005-01-21 | 2007-01-12 | 삼성전자주식회사 | 화상 데이터 부호화시의 비트율 제어방법 및 장치 |
EP1989882B1 (en) * | 2006-01-23 | 2015-11-11 | Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. | High dynamic range codecs |
KR101314453B1 (ko) * | 2006-04-19 | 2013-10-07 | 파나소닉 주식회사 | 시각 처리 장치, 시각 처리 방법, 프로그램, 표시 장치 및 집적 회로 |
US9106914B2 (en) | 2006-05-25 | 2015-08-11 | Thomson Licensing | Method and system for weighted encoding |
-
2006
- 2006-05-25 US US12/226,856 patent/US9106914B2/en not_active Expired - Fee Related
- 2006-05-25 EP EP06760417A patent/EP2020146A1/en not_active Ceased
- 2006-05-25 WO PCT/US2006/020423 patent/WO2007139534A1/en active Application Filing
- 2006-05-25 CN CN2006800546917A patent/CN101449586B/zh not_active Expired - Fee Related
- 2006-05-25 JP JP2009511992A patent/JP5384330B2/ja not_active Expired - Fee Related
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9106914B2 (en) | 2006-05-25 | 2015-08-11 | Thomson Licensing | Method and system for weighted encoding |
JP2013214992A (ja) * | 2013-06-18 | 2013-10-17 | Thomson Licensing | 重み付け符号化する方法及びシステム |
Also Published As
Publication number | Publication date |
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KR101521041B1 (ko) | 2015-05-15 |
KR20090032031A (ko) | 2009-03-31 |
CN101449586B (zh) | 2012-08-29 |
EP2020146A1 (en) | 2009-02-04 |
KR101368120B1 (ko) | 2014-02-28 |
WO2007139534A1 (en) | 2007-12-06 |
JP2009538560A (ja) | 2009-11-05 |
KR20130135394A (ko) | 2013-12-10 |
US20090067506A1 (en) | 2009-03-12 |
US9106914B2 (en) | 2015-08-11 |
CN101449586A (zh) | 2009-06-03 |
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