JP2018029361A - スケーラブルビデオ符号化のための動きベクトルの予測の方法および装置 - Google Patents
スケーラブルビデオ符号化のための動きベクトルの予測の方法および装置 Download PDFInfo
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Abstract
【解決手段】レイヤ間の動きマッピング情報が、ビットストリームの拡張レイヤの時間的動きベクトル予測(TMVP)に使用される。レイヤ間ビデオブロックの基準画像および動きベクトル(MV)が決定される。基準画像は、並置された基本レイヤのビデオブロックに基づいて決定される。TMVPは、レイヤ間ビデオブロックのMVを使用して拡張レイヤの画像に対して実行される。
【選択図】図8B
Description
本出願は、2012年8月29日に出願された米国特許仮出願第61/694,555号明細書、2012年12月7日に出願された米国特許仮出願第61/734,650号明細書、および2013年8月16日に出願された米国特許仮出願第61/866,822号明細書の利益を主張するものであり、これらの仮出願の内容は、参照により本明細書に組み込まれる。
r(uh)=rl, l=argmaxi∈{0,1,...,K-1}C(ri) 式(2)
ここで、C(ri),i=0,1,...,K−1は、基準画像riが使用される可能性がある回数のカウンタである可能性がある。例えば、基本レイヤの画像が{0,1}と表記される2つの基準画像(M=2)を有し、処理された基本レイヤの画像内の所与のuhが{0,1,1,1}から予測された4つの(K=4)基本レイヤのSPUに対応する可能性がある(例えば、{r0,r1,...,r3}が{0,1,1,1}に等しい可能性がある)場合、r(uh)は、式(2)に従って1に設定され得る。例えば、(例えば、式(2)を適用するときにC(ri)が同じである状況を打開するために)より小さな時間的距離を有する2つの画像ほどより高い相関を有する可能性があるので、現在の処理された画像への最小のPOCの距離を有する基準画像riが選択される可能性がある。
r(uh)=rl, l=argmaxi∈{0,1,...,K-1}Si 式(3)
ここで、Siは、基本レイヤからのi番目の対応するSPU biによって覆われる面積である可能性がある。例えば、2つ以上の対応するSPUが同じ面積のサイズを覆うときに、式(3)のSiが同じである状況を打開するために、現在の処理された画像への最小のPOCの距離を有する基準画像riが選択される可能性がある。
MV’=N・MVl, l=argmaxi∈{0,1,...,K-1}Si 式(4)
MV’は、SPU uhの結果として得られるMVを表記する可能性があり、MViは、基本レイヤからの第iの対応するSPU biのMVを表す可能性があり、Nは、レイヤ(例えば、基本レイヤと拡張レイヤと)の間の空間的な比率(例えば、空間解像度)に応じたアップサンプリング係数である可能性がある(例えば、Nは、2または1.5に等しい可能性がある)。例えば、アップサンプリング係数(例えば、N)は、処理された基本レイヤの画像内のPUのMVを計算するために、基本レイヤのPUから決定された結果として得られるMVをスケーリングするために使用され得る。
Claims (1)
- 基本レイヤおよび拡張レイヤを含むビットストリームを受信し、
レイヤ間基準画像を、復号化された基本レイヤ画像から作成し、前記レイヤ間基準画像は、前記復号化された基本レイヤ画像のテクスチャから決定されたテクスチャ、前記復号化された基本レイヤ画像の動きベクトルから決定された動きベクトル、および前記復号化された基本レイヤ画像の基準画像インデックスから決定された基準画像インデックスを含み、
前記レイヤ間基準画像を、拡張レイヤ画像に対する基準画像リストに追加し、
前記拡張レイヤ画像を、動きベクトル予測を使用して復号し、前記レイヤ間基準画像は、動きベクトル予測を使用して前記拡張レイヤ画像を復号することにおける使用のために、前記基準画像リストを介して利用可能である
ように構成されたプロセッサを備えたことを特徴とするデコーダ。
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US201261694555P | 2012-08-29 | 2012-08-29 | |
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US201361866822P | 2013-08-16 | 2013-08-16 | |
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CN (3) | CN108156463B (ja) |
AU (2) | AU2013308719B2 (ja) |
MX (1) | MX341900B (ja) |
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