JP5766815B2 - 画像符号化方法、および画像符号化装置 - Google Patents
画像符号化方法、および画像符号化装置 Download PDFInfo
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- H04N19/44—Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
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- H04N19/513—Processing of motion vectors
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T9/00—Image coding
- G06T9/004—Predictors, e.g. intraframe, interframe coding
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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
- H04N19/105—Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction
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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
- H04N19/117—Filters, e.g. for pre-processing or post-processing
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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
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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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- H04N19/186—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 colour or a chrominance component
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- H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive 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
- H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
- H04N19/503—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction
- H04N19/51—Motion estimation or motion compensation
- H04N19/513—Processing of motion vectors
- H04N19/517—Processing of motion vectors by encoding
- H04N19/52—Processing of motion vectors by encoding by predictive encoding
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- H04N19/503—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction
- H04N19/51—Motion estimation or motion compensation
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- H—ELECTRICITY
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- H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
- H04N19/503—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction
- H04N19/51—Motion estimation or motion compensation
- H04N19/567—Motion estimation based on rate distortion criteria
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Description
L=(PredMode==PredBi)&&
(nPSW<=nLPSW)&&(nPSH<=nLPSH)&&
(mvL0[0]&(RW−1))&&
(mvL0[1]&(RH−1))&&
(mvL1[0]&(RW−1))&&
(mvL1[1]&(RH−1)); ・・・(1)
L=(nPSW<=nLPSW)&&(nPSH<=nLPSH)&&
((PredMode==PredBi)&&
(mvL0[0]&(RW−1))&&
(mvL0[1]&(RH−1))&&
(mvL1[0]&(RW−1))&&
(mvL1[1]&(RH−1)))||
((PredMode==PredL0)&&
(mvL0[0]&(RW−1))&&
(mvL0[1]&(RH−1)))||
((PredMode==PredL1)&&
(mvL1[0]&(RW−1))&&
(mvL1[1]&(RH−1)))); ・・・(2)
L=((PredMode==PredBi)&&
(nPSW<=nLPSW)&&(nPSH<=nLPSH)&&
(mvL0[0]&(RW−1))&&
(mvL0[1]&(RH−1))&&
(mvL1[0]&(RW−1))&&
(mvL1[1]&(RH−1)))||
(((nPSW<=nLPSW1)&&
(nPSH<=nLPSH1))||
((PredMode==PredL0)&&
(mvL0[0]&(RW−1))&&
(mvL0[1]&(RH−1))&&
((PredMode==PredL1)&&
(mvL1[0]&(RW−1))&&
(mvL1[1]&(RH−1))); ・・・(3)
L=((PredMode==PredBi)&&
(nPSW<=nLPSW)&&(nPSH<=nLPSH)&&
!((mvL0[0]&(RW−1)==0)&&
(mvL0[1]&(RH−1)==0)&&
(mvL1[0]&(RW−1)==0)&&
(mvL1[1]&(RH−1))==0))); ・・・(4)
mvL0[1]=((mvL0[1]+(RH>>1))/RH)×RH;
mvL1[0]=((mvL1[0]+(RW>>1))/RW)×RW;
mvL1[1]=((mvL1[1]+(RH>>1))/RH)×RH;
・・・(5)
MV_Cost=SAD+λ×MV_Code ・・・(5)
101 入力動画像信号
102 減算部
103 変換/量子化部
104 逆量子化/逆変換部
105 エントロピー符号化部
106 加算部
107 復号画像信号
108 フレームメモリ
109 参照画像信号
110 予測画像生成部
111 予測画像信号
112 予測制御部
113 符号化制御部
114 色フォーマット情報
115 ブロックサイズ制限情報
116 動きベクトル探索部
117 動きベクトル情報
118 予測制御情報
119 プロファイル・レベル情報
120 符号化データ
300 画像復号装置
301 符号化データ
302 エントロピー復号部
303 逆量子化/逆変換部
304 加算部
305 復号画像信号
306 フレームメモリ
307 再生動画像信号
308 参照画像信号
310 予測画像信号
311 予測制御情報
312 ベクトル情報
313 プロファイル・レベル情報
Claims (4)
- 輝度成分と色差成分とを含む画像を符号化する画像符号化方法であって、
参照画像を取得する取得ステップと、
前記輝度成分および前記色差成分ごとに、前記参照画像に対して動きベクトルに応じた補間処理を行って、予測画像を生成する生成ステップと、を含み、
前記生成ステップは、2つの前記参照画像から前記予測画像を生成する双方向予測と、1つの前記参照画像から前記予測画像を生成する単方向予測とのうちいずれかを、明示的または暗黙的に指定された予測モードに基づき選択し、前記補間処理の単位として指定されたブロックの大きさが第1の条件を満たす場合であって、前記双方向予測が選択されていた場合に、前記双方向予測を前記単方向予測に変更し、前記参照画像に対して前記動きベクトルに応じた前記補間処理を行って前記予測画像を生成する、
画像符号化方法。 - 前記生成ステップは、前記補間処理の単位として指定されたブロックの大きさが、前記第1の条件とは異なる第2の条件を満たす場合、前記単方向予測を行わない、
請求項1に記載の画像符号化方法。 - 輝度成分と色差成分とを含む対象画像を符号化する画像符号化装置であって、
前記輝度成分および前記色差成分ごとに、参照画像に対して動きベクトルに応じた補間処理を行って、予測画像を生成する生成部と、
前記対象画像に対する前記予測画像の誤差を表す予測誤差から得られる係数情報を符号化する符号化部と、を有し、
前記生成部は、2つの前記参照画像から前記予測画像を生成する双方向予測と、1つの前記参照画像から前記予測画像を生成する単方向予測とのうちいずれかを、明示的または暗黙的に指定された予測モードに基づき選択し、前記補間処理の単位として指定されたブロックの大きさが第1の条件を満たす場合であって、前記双方向予測が選択されていた場合に、前記双方向予測を前記単方向予測に変更し、前記参照画像に対して前記動きベクトルに応じた前記補間処理を行って前記予測画像を生成する、
画像符号化装置。 - 前記生成部は、前記補間処理の単位として指定されたブロックの大きさが、前記第1の条件とは異なる第2の条件を満たす場合、前記単方向予測を行わない、
請求項3に記載の画像符号化装置。
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US (9) | US9135717B2 (ja) |
EP (4) | EP3280139B1 (ja) |
JP (1) | JP5766815B2 (ja) |
KR (3) | KR101597059B1 (ja) |
CN (2) | CN107277511A (ja) |
AU (2) | AU2011380761C1 (ja) |
BR (4) | BR112014004645B1 (ja) |
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