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Concept
Video on demand
Summary
Video on demand (VOD) is a media distribution system that allows users to access to videos, television shows and films without a traditional video playback device and a typical static broadcasting schedule. In the 20th century, broadcasting in the form of over-the-air programming was the most common form of media distribution. As Internet and IPTV technologies continued to develop in the 1990s, consumers began to gravitate towards non-traditional modes of content consumption, which culminated in the arrival of VOD on televisions and personal computers.
Unlike broadcast television, VOD systems initially required each user to have an Internet connection with considerable bandwidth to access each system's content. In 2000, the Fraunhofer Institute IIS developed the JPEG2000 codec, which enabled the distribution of movies via Digital Cinema Packages. This technology has since expanded its services from feature-film productions to include broadcast television programmes and has led to lower bandwidth requirements for VOD applications. Disney, Paramount, Sony, Universal and Warner Bros. subsequently launched the Digital Cinema Initiative, in 2002.
Television VOD systems can stream content, either through a traditional set-top box or through remote devices such as computers, tablets, and smartphones. VOD users can permanently download content to a device such as a computer, digital video recorder (DVR) or a portable media player for continued viewing. The majority of cable and telephone company–based television providers offer VOD streaming, whereby a user selects a video programme that begins to play immediately, or downloading to a DVR rented or purchased from the provider, or to a PC or to a portable device for deferred viewing.
Streaming media has emerged as an increasingly popular medium of VOD provision. Desktop client applications such as the Apple iTunes online content store and Smart TV apps such as Amazon Prime Video allow temporary rentals and purchases of video entertainment content.
Official source
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