1. An apparatus, comprising: a first unit configured to determine a first level of distortion associated with a first region of a reference first image and with a recovered second region of a second image that is being decoded with reference to the first image, the second region being adjacent to an unrecovered third region of the second image; a second unit configured to determine a first relationship between a reference motion vector and a motion vector for the second region; and a third unit configured to replace the unrecovered third region of the second image in response to the level of distortion associated with the first and second regions and in response to the relationship between the reference motion vector and the motion vector for the second region, wherein the third unit is configured to replace the unrecovered third region of the second image with the first region of the first image in response to a sum of the level of distortion associated with the first and second regions and the relationship between the reference motion vector and the motion vector for the second region.