Technology / Television (TV) / Pixelization: Pixelization occurs due to errors in decoding the MPEG bit stream where areas or patches of color appear instead of the higher resolution image. It might be described as the picture 'breaking up'. The patches of blocks appear and disappear, and can happen anywhere on the screen but usually are part of an image that is in motion. Pixelization most often occurs during rain fade or if the satellite TV system has too low a signal strength to operate properly.
Search Google for Pixelization: