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"./0123 4256789:; 4 ?@A. BCD789:; PBQ>RSN"46TUV (Error Concealment : EC) WXYZ OI A. OIB6WXYZ"46High Efficiency Video Coding (HEVC) E "4[\]#^=(_ `abQ 1 (Adaptive Prediction Unit-based Motion Vector Extrapolation : APMVE) c\]#^=(_ (Boundary Matching : BM) WXYZ (_ A. APMVE6[\]#^= dUef ( 1`abQ(Prediction Unit : PU)=(_Bg RbQ(Error Concealment Basic Unit : ECBU)=dUP BXBM c\]#^=(_Bg2hijk(Unreliable Block)l" Bgmn A. OIB6WXYZ oWXYZ"4pqp6jkrst=u d UOvBgw x#ty zg+A.AbstractRecently, most of the video services are usually transmitted in wireless networks. In networks environment, a packet of video is likely to be lost during transmission. For this reason, this paper proposes a new Error Concealment (EC) algorithm. For High Efficiency Video Coding (HEVC) bitstreams, the proposed algorithm includes Adaptive Prediction Unit-based Motion Vector Extrapolation (APMVE) and Boundary Matching (BM) algorithm, which employs both the temporal and spatial correlation. APMVE adaptively decides a Error Concealment Basic Unit (ECBU) by using the PU information of the previous frame and BM employing the spatial correlation is applied to only unreliable blocks. Simulation results show that the proposed algorithm provides the higher subjective quality by reducing blocking artifacts which appear in other existing algorithms.Keyword : Error Concealment, Boundary Matching, Motion Vector Extrapolation, HEVC, Prediction Unit |
