DVB stands for Digital Video Broadcasting. It can be defined as a set of internationally open standards for digital television. These standards are maintained by the DVB Projects, and published by a Joint Technical Committee (JTC) of the European Telecommunications Standards Institute (ETSI), European Broadcasting Union (EBU) as well as European Committee for Electrotechnical Standardization (CENELEC).
A set of standards of DVB defines digital broadcasting using existing digital TV, cable, and globalinfrastructures. In the year 1990, European broadcasters, consumer equipment manufacturers, and regulatory bodies created the European Launching Group with the aim to discuss and introduce digital television throughout Europe. After that, the group realized that mutual respect and trust had to be established between members later become the DVB Project. In the present era, the DVB Project includes more than 2200 organizations in more than 29 countries throughout the world.
Today, digital video broadcasting equipment is widely used and is distinguished by the DVB logo. Different types of DVB broadcast services are available in Europe, North and South America, Africa, Asia, and Australia. Sometimes, digital television is used as a synonym for digital video broadcasting. On the other hand, the Advanced Television Systems Committee (ATSC) standard is the digital broadcasting standard used in the United States.
DVB or digital video broadcasting uses conditional access systems in order to prevent external piracy. There are several conditional access systems available to content providers that help them to select the CA or conditional access system that are adequate for the services they provide. Each system delivers a security module that scrambles as well as encrypts data. Also, this module is embedded within the receiver or is detachable in the form of a PC card. There is a smart card inside the receiver that contains access details of the users.
Over the years, smart cards have been used to pay TV programming. These cards are quite affordable and allow content providers to issue updated smart cards periodically to prevent piracy. Detachable PC cards help subscribers to use DVB services anywhere digital video broadcasting can be used.
DVB or digital video broadcasting is an open system as opposed to a closed system. Closed systems can be defined as content provider-specific that is not expandable, but optimized only for television. Open systems like digital video broadcasting help the subscriber to select different content providers and allows integration of PCs as well as TVs. DVB systems are not just limited to televisions only. They can be used for home shopping and banking, private network broadcasting, and interactive viewing.
In addition, DVB provides future possibilities to provide superior-quality displays in buses, cars, trains, and hand-held devices. This system also allows content providers to provide their services anywhere DVB is supported in respect of geographic location, expand their services easily and affordably. It also ensures restricted access to subscribers and helps in reducing lost revenue due to unauthorizedviewing.
When it comes to comparing digital video broadcasting with analog, there are a number of benefits. Digital TV signals are quite compact than analog signals which mean they take less space within bandwidth and lead to more room for more stations in one area. Another benefit is digital video broadcasting allows high-definition television, which means one can enjoy a more clear and realistic picture as well as higher quality sound. In addition, the digital tunerhelps in removing all interference from the TV signals before converting them into the pictures as well as sounds. It means there is no distortion like static or snow on the picture.