Due to DTH providers in India, a huge race has appeared in providing HD quality content.
Airtel and Dolby Laboratories signed a contract, according to which Airtail is able to make use of Dolby Digital Plus as the surround sound format for its new set-top boxes as well as HD DTH service. As a result, Dolby Digital Plus will offer digital TV customers of Airtel HD content along with 7.1 channels.
It should be mentioned that Sun Direct was the first that started HD broadcasting in India. Then Dish, Big TV, Tata Sky as well as Airtel became the part of the HD fray. Still there is one problem, i.e. the lack of enough HD channels. But it is expected that the issue will be solved in the near future.
In fact, Dolby Digital Plus is considered to be a sophisticated audio system that is based on Dolby Digital. As a matter of fact, it is compatible with the Dolby Digital 5.1-channel formats that are usually used in home theatre systems.