VOD full form is Video on Demand. Video on Demand (VOD) is a media dispersion framework that permits clients to get to video without the limitations of a customary video playback gadget and a commonplace static transmission program. In the twentieth century, broadcast media as over-the-air writing computer programs was the most well-known type of circulation. As Internet and IPTV innovations kept on creating during the 1990s, customers started to go to modern strategies for content utilization, coming full circle in the appearance of VOD on TVs and PCs. Dissimilar to communicate TV, VOD frameworks at first require every client to have an Internet association with adequate data transmission to get to every framework's substance. In 2000, the Fraunhofer Institute IIS fostered the JPEG2000 codec, which empowered the conveyance of movies through the Digital Cinema bundle. This innovation has extended its administrations from highlight film creations to incorporate transmission. TV programs and has prompted lower transfer speed prerequisites for VOD applications. Disney, Paramount, Sony, Universal and Warner Bros. later launched Digital Cinema Initiatives, in 2002. Television VOD systems can stream content through traditional set-top boxes or through remote devices such as computers, tablets, and smartphones. VOD users can download content permanently to a device such as a computer, digital video recorder or portable media player for continuous viewing. Most cable and telephone company-based television providers offer VOD streaming, whereby the user selects a video program that begins playing immediately or is downloaded to a digital video recorder (DVR) rented or purchased from the provider. , or a PC or a portable device for deferred viewing.
Downloading and streaming VOD framework gives every one of the highlights of a compact media player and DVD player to the client. A few VOD frameworks store and stream programs from the hard circle drive and utilize a memory cradle so the client can quickly advance and rewind the video. It is possible to set up a video server on a local area network; These can provide fast feedback to the users. Cable companies have launched their own versions of VOD services through the app, allowing television access wherever there is an internet enabled device. Cable media companies have combined VOD with live streaming services. The cable companies' launch of apps is an attempt to compete with subscription video on demand (SVOD) services because they lack live news and sports content. Streaming video servers can serve a wider community via a WAN but the response may be low. Download VOD services are practical in homes equipped with a cable modem or DSL connection. Servers for traditional cable and telco VOD services are typically placed at the cable head-end, serving a particular market and cable hubs in larger markets. In the telco world, they are kept either in the central office or in a newly created location called the Video Head-end Office (VHO).