On The Mobile Tv Business Analysis And Implementation Of Technology
1, Introduction Now more and more satisfied users have phones available for text
, images, sounds and low-quality video messages to cell phones can be used all kinds of TV watching. Can usually be way wireless streaming media and digital broadcast mobile TV services to achieve. Compared to streaming media technology, digital broadcast mobile TV users can not only provide a broadcast-quality viewing experience of TV channels, but also in the network construction and operating costs have a big advantage, which led telecom operators and broadcast practitioners persons attention.2, radio and television technology 2.1 radio and television technology advantages
Telecom operators to provide mobile TV service is based VOD technology to realize, this is a real-time streaming media technology. The technology in the mobile TV business promotion with insurmountable problems. Compared with the VOD technology, digital multimedia broadcasting (DMB) technology has the following advantages.
2.1.1 do not take wireless communication resources
Streaming video huge amount of information required to occupy the wireless resource and bandwidth. DMB technology using terrestrial broadcast channel to achieve the program issued, it is no longer occupied by the wireless communication channel, thus saving a lot of wireless communication resources.
2.1.2 to use lower cost
Because DMB is a pure receiver of video technology, a user viewing time did not take any resources, users need only pay for what to watch without having to pay for the flow of the radio resource. The connection-based VOD service, receive video information, the need to take up telephone traffic channel, so users need to pay for his connection to the flow of high cost, this is the reason why VOD business is not ideal root causes. Good video effects
2.1.3 DMB does not exist because the problem of low utilization of resources, making the video bandwidth of DMB is guaranteed, can provide high-quality video services, in the 7-inch LCD screen, reaching the level of display quality VCD.
2.2 standards and the development of digital broadcasting technology
Various mobile TV technologies currently exist, the more mature applications are S-DMB, T-DMB, DVB-H and Qualcomm's Media-FLO technology introduction. Currently, the domestic broadcasting Academy STimi technical standards are maturing.
2.2.1S-DMB
Satellite digital multimedia broadcasting system (S-DMB) is a blend of satellite and mobile network systems. Satellite radio channel, mobile networks, interactive access, complete business navigation, ordering and activation. From the technical view, S-DMB maximize the reuse of mobile technologies, such as 3GPPMBMS existing network architecture and function interface, an increase of satellite-related functional modules, while BM-SC and UE have a small number of features increase. S-DMB satellite downlink work in IMT2000 band (2170 ~ 2200MHz), the spectrum allocation from the global perspective, most regions and countries of the satellite bands are available, which provide the basis for global roaming. S-DMB use of the 3GPP-defined UTRAWCDMAFDD empty technology, also used the 3GPPR6MBMS business features, S-DMB architecture is defined in the ETSI in the.
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