JP5919405B2 - 映像復号化装置 - Google Patents
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- 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
- H04N19/103—Selection of coding mode or of prediction mode
- H04N19/11—Selection of coding mode or of prediction mode among a plurality of spatial predictive coding modes
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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
- H04N19/12—Selection from among a plurality of transforms or standards, e.g. selection between discrete cosine transform [DCT] and sub-band transform or selection between H.263 and H.264
- H04N19/122—Selection of transform size, e.g. 8x8 or 2x4x8 DCT; Selection of sub-band transforms of varying structure or type
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- 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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- H04N19/18—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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- Magnetic Resonance Imaging Apparatus (AREA)
Description
(付記1) 動画符号化装置において、
入力される映像を所定サイズの符号化単位ブロックに分割し、前記符号化単位ブロック別に予測符号化ブロックのサイズ及び予測モードを定める符号化モード決定部と、
符号化単位ブロックとイントラ予測またはインター予測を通じて生成された予測ブロックの残差ブロックを変換符号化及び量子化する変換符号化/量子化部と、
前記量子化された残差ブロックを逆量子化して逆変換し、周波数領域に変換する逆量子化/変換復号化部と、
前記逆量子化/変換復号化部から受信された映像データにブロッキングフィルタリングを適用するブロッキングフィルタリング部と、
予測符号化ブロックを生成する予測ブロック生成部と、
前記変換符号化/量子化部によって量子化された変換係数を符号化するエントロピー符号化部と、を備え、前記エントロピー符号化部は、変換符号化ブロックのサイズが所定サイズ以上である場合に量子化された変換係数を複数のサブセットに分割し、それぞれのサブセット単位で、0ではない量子化係数をスキャンしてエントロピー符号化することを特徴とする動画符号化装置。
(付記2) 前記サブセット内の0ではない量子化係数は、複数のスキャンパターンのうち一つによって逆方向にスキャンされることを特徴とする付記1に記載の動画符号化装置。
(付記3) 前記サブセット内の0ではない量子化係数をスキャンするスキャンパターンと、前記サブセットをスキャンするスキャンパターンとは同一であることを特徴とする付記1に記載の動画符号化装置。
(付記4) 前記サブセット内の0ではない量子化係数をスキャンするスキャンパターンは、イントラ予測モードによって定められることを特徴とする付記1に記載の動画符号化装置。
(付記5) 前記エントロピー符号化部は、前記変換符号化ブロック内の0ではない最後の量子化係数の位置、及び前記サブセット内の0ではない量子化係数を識別できる情報を前記量子化係数と別途に符号化することを特徴とする付記1に記載の動画符号化装置。
Claims (2)
- 映像復号化装置において、
映像符号化装置からイントラ予測モード及び1次元の量子化変換係数を受信して、前記1次元の量子化変換係数を用いて量子化ブロックを復元するエントロピー復号化部と、
前記イントラ予測モードによって予測ブロックを生成するイントラ予測部と、
前記量子化ブロックを逆量子化及び逆変換して、復元された残差ブロックを生成する逆量子化/変換復号化部と、
前記残差ブロック及び前記予測ブロックを加えて元ブロックを生成する加算部と、を備え、
前記量子化ブロックのサイズが8×8であれば、前記エントロピー復号化部は前記1次元の量子化変換係数に前記イントラ予測モードによって定められるスキャンパターンを適用してメインサブセット及び複数の残余サブセットを復元して、前記メインサブセット及び複数の残余サブセットに前記イントラ予測モードによって定められるスキャンパターンを適用して前記量子化ブロックを復元して、
前記1次元の量子化変換係数から前記メインサブセット及び複数の残余サブセットを復元するために適用されるスキャンパターンと、前記メインサブセット及び複数の残余サブセットから前記量子化ブロックを復元するために適用されるスキャンパターンとは同一で、
前記イントラ予測モードが垂直モードであれば、前記スキャンパターンは水平スキャンで、 前記イントラ予測モードが水平モードであれば、前記スキャンパターンは垂直スキャンで、
前記メインサブセット及び複数の残余サブセットは、逆方向にスキャンされることを特徴とする装置。 - 前記イントラ予測部は、参照画素が利用できなければ、参照画素を生成することを特徴とする請求項1に記載の装置。
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JP2013506093A Active JP5688136B2 (ja) | 2010-04-23 | 2011-04-22 | 映像を符号化する装置及び方法 |
JP2014217428A Active JP5877236B2 (ja) | 2010-04-23 | 2014-10-24 | 映像を符号化する装置及び方法 |
JP2015019646A Active JP5919404B2 (ja) | 2010-04-23 | 2015-02-03 | 映像符号化装置 |
JP2015019647A Active JP5919405B2 (ja) | 2010-04-23 | 2015-02-03 | 映像復号化装置 |
JP2015019650A Expired - Fee Related JP5928966B2 (ja) | 2010-04-23 | 2015-02-03 | 映像符号化装置 |
JP2015019649A Active JP5919407B2 (ja) | 2010-04-23 | 2015-02-03 | 映像復号化装置 |
JP2015019648A Active JP5919406B2 (ja) | 2010-04-23 | 2015-02-03 | 映像復号化装置 |
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JP2016082316A Active JP6084730B2 (ja) | 2010-04-23 | 2016-04-15 | 映像復号化装置 |
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US (11) | US9100651B2 (ja) |
EP (8) | EP2563020B1 (ja) |
JP (8) | JP5688136B2 (ja) |
KR (10) | KR20140057670A (ja) |
CN (11) | CN104717498B (ja) |
AU (6) | AU2011243334B2 (ja) |
BR (6) | BR122014030027A2 (ja) |
CA (9) | CA2934930C (ja) |
CY (6) | CY1116723T1 (ja) |
DK (6) | DK2947878T3 (ja) |
ES (8) | ES2602677T3 (ja) |
HR (6) | HRP20150964T1 (ja) |
HU (8) | HUE057125T2 (ja) |
IL (6) | IL222579A (ja) |
LT (5) | LT2945382T (ja) |
MX (6) | MX2012012333A (ja) |
MY (11) | MY162153A (ja) |
PE (8) | PE20170651A1 (ja) |
PH (5) | PH12014501184B1 (ja) |
PL (8) | PL2950534T3 (ja) |
PT (6) | PT2947878T (ja) |
RS (6) | RS55761B1 (ja) |
RU (7) | RU2523963C2 (ja) |
SG (11) | SG10201503183TA (ja) |
SI (6) | SI2950534T1 (ja) |
SM (2) | SMT201500244B (ja) |
WO (1) | WO2011133002A2 (ja) |
ZA (1) | ZA201208766B (ja) |
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