Tiling effect in quality assessment for high definition digital television

Although in the past decades bandwidth capacities have increased in existing networks, video compression techniques are still essential for managing high bit rates required by video services, especially those related with the trends on high definition video services. Using compression implies in most cases lossy processes that, in addition to reduce average video quality, create undesirable errors called artifacts. The treatment and removal of these artifacts from video sequences is a primary goal in nowadays coding standards. One of the most common and perceptually annoying artifacts is called tilling. Unwillingly produced by many digital coding systems, such as H.264, its particular treatment is a new investigation line that is described deeply in this paper.