Abstract
As the so-called motion-sharpening known in the field of psychology, a new phenomenon named "TFA (Temporaly-Free Aliasing) motion" was discovered, which is distorted with aliasing in still pictures, but is clear when moving. The resolution is twice higher than considered by the sampling theorem, which may lead to super-resolution. This is analyzed in the spatio-temporal frequency domain, and examined by watching computer-simulated pictures.