Abrupt cut shot cut detection Pearson correlation coefficient mutual information sign language Average face Bézier curves H.264 Key frame MSAD MSE Model-based coding Multiplex NURBS Objective quality metrics SSIM Triangulation VQM Video quality assessment adaptive threshold capacity content content based metrics error concealment fast algorithm finger alphabet frame group of pictures metric object-based image objective video quality quality region recognition saliency shape coding video visual attention weighted MSE