"HDTV processing lag ( also known as "input lag" ) is a phenomenon that is unique to modern televisions. In the pursuit of making the end picture better, TV manufacturers have built a myriad of video processing filters into their products. These filters have been designed to aesthetically benefit the playback of movies and broadcast TV."This video processing lengthens the time between a signal being passed from its source ( your DVD player, antenna, or game system ) and the resulting picture being displayed on the screen."