08-06-2013, 03:54 PM
IPTV
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What is an IPTV?
IPTV is a system used to deliver digital television services to the consumers who are registered subscribers for this system. This delivery of digital television is made possible by using Internet Protocol over a broadband connection, usually in a managed network rather than the public Internet to preserve quality of service guarantees.
IPTV, essentially, has two components:
Part 1: Internet Protocol (IP):
Specifies the format of packets and the addressing scheme for a network. Most networks combine IP with a higher level protocol. Depending on the vendor solution, user datagram protocol (UDP) is the most typical higher-level protocol. The protocol establishes a virtual connection between a destination and a source. IP allows you to address a package of information and drop it in the system, but there’s no direct link between you and the recipient.
Part 2: Television (TV):
Specifies the medium of communication that operates through the transmission of pictures and sounds. We all know TV, but here we are referring to the services that are offered for the TV, like linear and on-demand programming.
Often, this service is provided together with Video facility on demand. In addition to this, there is provision to include Internet services such as web access and Voice over Internet Protocol (VoIP). In cases when internet service is also provided, it may be called Triple Play.
Why IPTV?
Consumers always want more and high quality. Now days most of TV are analog with one way data transmission and limited channel. IPTV provides all digital, two ways connected, unlimited channels, integrated (DRV, HDTV, PIPs, VoD) and personalized TV. IPTV enhances the TV offer and delivers in a new way to provide better experience to watch TV in a Simple, Personalized and in an advanced way.
HISTORY
In 1994, ABC's World News Now was the first television show to be broadcast over the Internet, using the CU-See Me videoconferencing software. The term IPTV first appeared in 1995 with the founding of Precept Software by Judith Estrin and Bill Carrico. Precept designed and built an internet video product named "IP/TV". IP/TV was an MBONE compatible Windows and UNIX based application that moved single and multi-source audio/video traffic, ranging from low to DVD quality, using both unicast and IP multicast RTP/RTCP. The software was written primarily by Steve Casner, Karl Auerbach, and Cha Chee Kuan. Precept was acquired by Cisco Systems in 1998. Cisco retains the "IP/TV" trademark.
Internet radio company AudioNet started the first continuous live webcasts with content from WFAA-TV in January, 1998 and KCTU-LP on January 10, 1998. Kingston Communications, a regional telecommunications operator in UK, launched KIT (Kingston Interactive Television), an IPTV over DSL broadband interactive TV service in September 1999 after conducting various TV and VoD trials. The operator added additional VoD service in October 2001 with Yes TV, provider VoD content. Kingston was one of the first companies in the world to introduce IPTV and IP VoD over ADSL.
IPTV VS. CONVENTIONAL TV TRANSMISSION
More than simply a new distribution and playback method, IPTV is poised to create an entirely new mindset about the television experience. Whereas current terrestrial broadcast television is the same content sent continuously to all consumers’ homes, IPTV removes the fixed television schedule. Similar to how information on the Internet can be downloaded and viewed at any time, IPTV enables television programming to be available whenever each individual consumer demands it. In this way, each household can create their own custom content and viewing schedule. And other differentiators are sophisticated digital video recorder (DVR) and time-shifting capabilities (the ability to stop, pause, and rewind real-time programs) and a rich VoD environment. Therefore it is essential for a sustainable IPTV business to rapidly evolve the new offering toward an interactive experience that clearly differentiates IPTV from those TV offerings that subscribers can get and enjoy already.
HOW DOES IPTV WORK?
It's almost the same as getting television through an antenna or a series of cable wires -- the difference is that information is sent over the Internet as data. At the same time, you can find even more variety on Internet TV than cable TV. Along with many of the same shows you find on the big networks, many Web sites offer independently produced programs targeted toward people with specific interests.
Because many sites offer on-demand services, you don't have to keep track of scheduling. For sites using web casting or real-time streaming video, though, live broadcasting is still an option. Internet TV is relatively new -- there are lots of different ways to get it, and quality, content and costs can vary greatly. Shows can be high-quality, professionally produced material.
Internet Bandwidth and Streaming
There are two things that make Internet TV possible. The first is bandwidth. To understand bandwidth, it's best to think of the Internet as a series of highways and information as cars. If there's only one car on the highway, that car will travel quickly and easily. If there are many cars, however, traffic can build up and slow things down. In the same way -- if only one person is downloading one file, the transfer should happen fairly quickly. If several people are trying to download the same file, though, the transfer can be much slower.