A TV site is a website designed for viewing on a television set.
Unlike mobile and PC access, the use of internet sites through the TV has been small, mostly due to the poor user experience of many "web on TV" deployments, and the "walled garden" or closed platform business models adopted by many TV network operators. 
With the advent of IPTV and Broadband enabled TV Devices web site owners have realized, that like Mobile, TV needs to be considered as a different media, and that Mobile, TV and PC based internet access all present different user interface design challenges in order to make the services usable and acceptable to consumers on the device they are using.
TV Sites can be developed and deployed using a number of different technologies including Adobe Flash, WTVML, Java and HTML, although the same design principles apply whatever the development technology.
Typically TV Sites are differentiated from other web sites by having a "wtv." rather than a "www." subdomain.
Interfaces.
The following styles of interface are often considered:
These interfaces are characterized as follows: