Mobile Digital Broadcasting (DTV) combines two of the best-selling consumer products ever, TV and mobile. Television is expected to be a major driver of demand for next-generation wireless mobile phones, as consumers want to integrate communications and entertainment into one device.
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At all levels of the mobile DTV value chain, telecom operators, handset providers, infrastructure owners, content providers, broadcasters and semiconductor suppliers are continually increasing their investment, and this is also reasonable. According to analyst firm Informa, by 2011, the number of users in the mobile TV market will reach 210 million, and 10% of mobile handsets sold will have the function of broadcast TV receivers.
Mobile DTV Worldwide
There are many forms of mobile TV in the world, and signals can be transmitted through a variety of different radio broadcast networks, each using different transmission methods, such as unicast, multicast, and broadcast. Each approach has its own advantages, but only by combining these three approaches can the best experience for consumers.
The unicast service is mainly used to send small video files or streaming media content (such as TV programs) to a single mobile phone user through a cellular network. This technology can be used to achieve higher average user revenue (ARPU), but if the unicast service is too popular, it is possible to cause the cellular network to degrade performance when the demand for unicast service is high. These video services, now available from multi-service providers, enable consumers to have a more comfortable experience when enjoying broadcasts on their mobile phones;
Multicast services also use cellular networks, but provide one-to-many services that send the same content to multiple users simultaneously. Although this improves bandwidth utilization, multicast consumption of network bandwidth is not a small glimpse;
The broadcasting business is the focus of this paper, which uses an independent radio broadcast network to transmit broadcast television content. Each user can receive and play the same content through a mobile phone that supports the broadcast function without affecting the network capacity of the operator. There are several different standards for broadcast television services in the world, and all standards are currently in trial operation, that is, they have begun to be deployed for consumers;
The perfect integration of the above three modes of communication not only enables the best user experience, but also creates revenue opportunities for cellular operators. Operators can provide broadcast TV programs (typically 20 channels) to a wide range of users. The new mobile app, which is in the design phase, will allow users to retrieve specific program content on demand using a convenient unicast method. Engagement ads allow users to purchase or view an item they’ve just watched on a TV broadcast through their mobile browser. Features such as Personal Video Recorder (PVR) can be used to download and store large amounts of audio and video files during periods of low cellular system usage (such as nighttime).
Mobile Broadcast DTV Standard
As with most new technologies, there are several different mobile broadcast TV standards in the world today. These standards include three major open standards developed by industry associations:
DMB (Digital Multimedia Broadcasting) is derived from the Digital Audio Broadcasting (DAB) standard for digital radio broadcasting and was originally used in the satellite broadcasting service. DMB has been identified as the Terrestrial antenna tower broadcast service in Korea, called T-DMB. The DMB business is now commercially deployed in Korea and is being commissioned in Europe and other parts of Asia (mostly DAB networks are readily available).
DVB-H (Digital Video Broadcasting - Handheld Terminal) evolved from the DVB standard used in cable, satellite and terrestrial television services in Europe. The low-power mode of DVB-H is not only ideal for battery-powered devices, but it also significantly improves radio performance when used in mobile devices. The DVB-H standard has been deployed commercially in Europe and commissioned in other parts of the world. ISDB-T (Integrated Services Digital Broadcasting - Terrestrial) is Japan's digital TV standard that includes a model that maximizes the battery life of handheld devices. The ISDB-T business for mobile phones has been commissioned in Japan.
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In addition, there are other technologies developed for mobile DTV in the industry, but they are not in the category of open standards. In today's North American market, FLO? is one example of this. China is considering adopting open standards like DVB-H and DMB, as well as the possibility to designate proprietary technologies as China Mobile TV standards.
DVB-H ISDB-T DMB FLO? Region Europe, USA, Taiwan, China, Australia (to be announced), Singapore, Japan, Brazil (to be announced) Korea, France, UK, Germany, China (to be announced) Since 2004, a total of 37 cities worldwide, Europe and the United States began to use the second half of 2005 to the first quarter of 2006 in the first quarter of 2006. The first quarter of Europe, the second quarter of 2006, the business type and service availability of the service began to be used.
Europe in the second half of 2006;
Italy (TIM) June 2006;
The fourth quarter of 2006. Free, available in S-DMB booking in April 2006, May 2005; T-DMB free, October 2005, 2006, 2006, mobile phone types Nokia, Samsung, LG, Siemens, Motorola NEC, PMC ,
Sharp, Sanyo Samsung, LG, Pantech Samsung, LG Industry supports more than 100 companies More than 20 companies More than 10 companies FLO Forum More than 30 broadcasters Broadcast operators Modeo, Hi-Wire, Digita, MTV3, Abertis, KPN, Swisscom Brd, Canal+, TF1, France Tele, Arquiva, BBC, Eurosport, ITV
TV-Ashi, Fuji-TV TBS, NTV, TV-Tokyo, TV-Chiba TU-Media, KBS, SBS, MBC, BBC, TF1, T-Systems MediaFLO Operator 3 Italia, TeleSonera, Vodafone, T-Mobile, Bouygues , Swisscom, SFR, Orange, Telefonica Moviles, O2 NTT DoCoMO, Vodofone, KDDI SKT, Debitel Verizon
Open standards have an advantage over proprietary technologies and networks controlled by a single company. In the open mobile DTV market, every ring of the value chain can benefit from this TV market to be developed and win more revenue opportunities. Consumers are the ultimate winners, and they can benefit from the design of innovative low-priced products.
Among the many standards in the mobile DTV market, DVB-H has the broadest market penetration and the world's strongest industry support team, with hundreds of companies developing relevant services, devices, software and hardware for this standard. The main advantages of DVB-H include:
Openness - Develop in an open community based on open standards, whether for the entire industry or for consumers, compared to developing products in a proprietary closed environment where only a few vendors have a major value chain Both are of great benefit. Because the proprietary environment limits the ability of companies to participate and generate revenue from the value chain;
Trial - DVB-H is commercially available in Italy and has been or has been tested in more than 35 cities worldwide. These experiments have further refined the technology to achieve mass deployment. In addition, valuable market information was obtained during the trial, such as the appreciation habits of the duration and location, which are popular content, and the monthly fee for the service acceptable to the user;
Proven technology - DVB-H evolved from proven global standards for European terrestrial and satellite DTV transmissions, and its low-power mode is ideal for battery-powered devices. This inherent advantage is also the main reason why industry analysts believe that DVB-H will become the dominant standard in the mobile DTV market.
OFDM - DVB-H uses Orthogonal Frequency Division Multiplexing (OFDM) air interface technology and integrates techniques that reduce tuner power consumption. DVB-H uses Time Slicing to be able to turn off the tuner for most of the time and only on short transit bursts. This allows the tuner to operate at a lower input bandwidth and also saves power. OFDM is an ideal solution for mobile TV air interfaces, which has good spectral efficiency, excellent multi-path and mobile performance, and can perform well in single-frequency networks that will be used in mobile TV.
DVB-H value chain
Because DVB-H is an open standard, it is available to anyone on the market to develop, develop and roll out relevant mobile DTV products and services. In addition, the standard will enable flexible business models, more revenue-generating opportunities and lower consumer prices, which will accelerate the popularization of the technology. The DVB-H value chain has nothing to look like on the surface, but includes content providers, broadcasters, infrastructure companies, carriers, handheld terminal OEMs, silicon chip vendors, and third-party software vendors. But a closer look reveals that it is not as simple as imagined, because there is a cross-pollination in the vendor catalog, which is another advantage of DVB-H's overall openness.
DVB-H network: a combination of broadcast and unicast services
　　
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