Online TV

In the fields of broadcasting and content delivery, (OTT) stands for over-the-top and is also referred to as "value added". Most of us have been using OTT services without actually realizing. Simply put, OTT refers to the service you use over the network services of your service provider with broadband delivery of video and audio without a multiple system operator being involved in the control or distribution of the content itself. The provider may be aware of the contents of the IP packets but is not responsible for, nor able to control, the viewing abilities, copyrights, and/or other redistribution of the content

Here is an example to better understand the concept. You have a 3G data plan with a mobile operator, from which you have bought a smartphone and with which you have GSM calls and SMS service. Then, you use Skype or any other VoIP service to make cheaper and free voice calls and SMS using the 3G network. Skype here is referred to as the OTT service.

This is in contrast to purchase or rental of video or audio content from an Internet provider, such as Cable Television, DTH, or an IPTV service providers, like HomeCable, TATA Sky, AirTel. OTT-TV in particular refers to content that arrives from a third party, such as Netflix, TV-Anywhere, Home Digital or MyTV, and is delivered to an end user device, leaving the internet provider responsible only for transporting IP packets. Consumers can access OTT-TV content through internet-connected devices such as PCs, Laptops, Tablets, Smart Phones, OTT Set-Top Boxes, Smart TVs and Gaming Consoles such as the Wii, PlayStation 3 and Xbox 360.

Internet TV

OTT has also been a vector in the proliferation of Internet TV, also known as IPTV, which is the legal distribution of videos and television content over the Internet. These video OTT services are obtained online, from Youtube for instance and from other sites where more sustained and constant streaming video content are offered.