JP6046840B2 - 映像予測単位についてのイントラ予測モード符号化方法及び装置、並びに映像予測単位についてのイントラ予測モード復号化方法及び装置 - Google Patents
映像予測単位についてのイントラ予測モード符号化方法及び装置、並びに映像予測単位についてのイントラ予測モード復号化方法及び装置 Download PDFInfo
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Description
一実施形態によるビデオ復号化装置200の映像データ及び符号化情報抽出部220は、符号化単位900についての符号化深度及び予測単位に係る情報を抽出して、符号化単位912を復号化するのに利用する。一実施形態によるビデオ復号化装置200は、深度別の分割情報を利用して、分割情報が‘0’である深度を符号化深度として把握し、当該深度についての符号化モードに係る情報を利用して復号化する。
以下、図28を参照して、色差成分の予測単位についてのイントラ予測モード符号化過程を具体的に説明する。
また、符号化モード予測部2630は、既定の色差成分のイントラ予測モード候補グループのうち、輝度成分のイントラ予測モードと重なるイントラ予測モードに対しては、イントラ予測モード候補グループから除いて、別途のインデックシングを行わない。
Claims (1)
- 映像の復号化方法において、
ビットストリームから獲得された輝度予測単位のイントラ予測モード情報に基づいて、前記輝度予測単位のイントラ予測モードを決定するステップと、
前記ビットストリームから前記輝度予測単位に対応する色差予測単位のイントラ予測モード情報を獲得するステップと、
前記輝度予測単位のイントラ予測モードと同じイントラ予測モードを含む前記色差予測単位のイントラ予測モード候補グループを獲得するステップと、
前記色差予測単位のイントラ予測モード情報に基づいて、前記色差予測単位のイントラ予測モード候補グループに含まれたイントラ予測モードのうち前記色差予測単位のイントラ予測モードを決定するステップと、
前記決定されたイントラ予測モードによって前記色差予測単位に対するイントラ予測を行うステップを含み、
前記色差予測単位のイントラ予測モード情報は、前記色差予測単位のイントラ予測
モード候補グループに含まれたイントラ予測モードのうち一つを指すインデックス情報であり、
前記輝度予測単位のイントラ予測モードが前記色差予測単位のイントラ予測モード候補グループに含まれた所定のイントラ予測モードと同一である場合、前記輝度予測
単位と同じイントラ予測モードを指していた前記インデックス情報は前記輝度予測単位のイントラ予測モードとは異なるイントラ予測モードを指し、
前記所定のイントラ予測モードは、DCモード、水平モード及び垂直モードのうち一つであることを特徴とする映像の復号化方法。
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