Adaptive global concealment of video up-conversion artefacts

Video field-rate conversion requires algorithms that improve dynamic resolu tion without degrading motion portrayal. Motion-compensated up-conversion i s the state-of-the-art in this field. But motion compensation sometimes int roduces objectionable artefacts into the output picture due to incorrect mo tion vectors. This paper describes a method of suppressing the image degrad ation due to motion compensation artefacts. It is unique in that it estimat es global image degradation to determine the required level of error concea lment or fallback. Two levels of fallback are implemented which take human perception properties into consideration. They are realized on a micro-proc essor's ROM connected to an up-converter ICI