1. A de-interlacer device comprising: a memory for receiving and storing picture information; a temporal de-interlacer for de-interlacing picture information from the memory; a spatial de-interlacer for de-interlacing picture information, said spatial de-interlacer calculates a reliability of a directional interpolation; and a mixer that mixes outputs of said temporal de-interlacer and said spatial de-interlacer according to a calculated mix factor.