Interactive TV
It is the name given to any television with what is called a “return path”. Information flows not only from the broadcaster to viewer, but also back from the viewer to the broadcaster. Another feature common to all iTV systems is the ability to offer each TV set, or each viewer who uses that TV set, a different choice of content. Interactive television describes any number of efforts to allow viewers to interact with television content as they view. It is sometimes called as interactive TV, iTV, idTV, or ITV. It is often described as “lean back” interaction, as users are typically relaxing in the living room environment with a remote control in one hand.