IPTV is television delivered over Internet Protocol. Traditional television service normally refers to linear programming (one-way scheduled audiovisual programming) of broadcast quality offered as a channel/channels designed to be viewed on a TV set. However, as technology develops, the definition of television may change in at least one of the areas cited below with implications as well for the definition of IPTV.
Linear Programming Electronic programming guides (EPG) and digital video recorders (DVR) allow viewers to easily record scheduled television programming for watching at times of their choices. Interactive functionality also enables viewers to escape from scheduled programming toward Video on Demand (VoD). Viewers may start to regard, in the future, DVR-recorded video and non-linear programming as television programmes.
Broadcast quality – Quality of video can also be a factor in determining if a programme is meant to be viewed on a PC or on a TV, but as bandwidth and processing power increase, the distinction between broadcast quality2 and non-broadcast quality is likely to disappear. Offered as a Channel/Channels Choosing an arbitrary threshold between a series of programming in a channel/channels and a video clip may provide a further distinction between TV programmes and non-TV programmes. However, as Internet video providers such as MSN Video3, CBS News Video4 provide playlist functions, stringing video clips together, viewers would simply tune in to a channel of custom-defined content.