Mobile Digital Radio and Television (DTV) will combine two best-selling consumer products ever - television and mobile phones. TV will be expected to be a major driving factor for a new generation of wireless mobile phone demand, because consumers want to integrate all communication and entertainment in the same device.
At all levels, telecom operators, mobile suppliers, infrastructure owners, content providers, broadcasting companies, and semiconductor suppliers have spare no effort, and this is also reasonable. According to the analysis company informa data, by 2011, the number of users in mobile TV market will reach 210 million, and 10% of the mobile handheld terminal sold have a function of broadcasting and television receivers.
Mobile DTV global
There are a variety of forms of mobile TVs in the world, and can vary different transmission methods, such as unicast, multicast, and broadcasting through a variety of different radio broadcast networks. Each way has its advantages, but only these three methods can be integrated to bring the best experience to consumers.
Unicast services are mainly used to send small video files or stream 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 unicast business is too popular, it is possible to reduce the performance of the cellular network in unicast business demand. These today's video services available by multi-service providers have a more comfortable experience when consumers appreciate the broadcast programs on their mobile phones;
The multicast business also uses a cellular network, but provides a pair of more services, which simultaneously sends the same content to multiple users. This increases the bandwidth utilization, but the consumption of multicast to network bandwidth is not small.
Broadcasting business is the focus of this article, which uses a separate radio broadcast network to transmit broadcast TV content. Each user can receive and play the same content by supporting the broadcast function, without affecting the network capacity of the operator. There are several different broadcast and television business standards in the world, and all standards are currently in the trial operation phase, which has begun to deploy them for consumers;
The perfect integration of the above three propagation methods can not only achieve the best user experience, but also brings income to honeycomb operators. Operators can provide radio and television programs for the majority of users (generally 20 channels). In the design phase, the new mobile app will allow users to use convenient unicast methods to retrieve specific program content as needed. Interactive advertising users can purchase or see some items that have just been viewed in TV broadcasts through mobile browsers. Features such as personal video recorders (PVRs) can be used to download and store large amounts of audio and video files during the low use rate of cellular system (such as night).
Mobile broadcast DTV standard
Like most new technologies, there are several different mobile radio and television standards in the world. These standards include three major open standards developed by the Industry Association:
DMB (Digital Multimedia Broadcast) is derived from digital audio broadcast (DAB) standards for digital radio broadcasts, initially used for satellite broadcasting business. DMB is now identified as the Terrestrial Antenna Tower Broadcast Service, called T-DMB. The DMB business is now in Korea has been put into business deployment and is conducting trial operation in Europe and other parts of Asia (mostly ready-made).
DVB-H (Digital Video Broadcasting - Handheld Terminal) evolved from the DVB standard used in Europe's wired, satellite and ground TV services. The low-power mode owned by the DVB-H is not only very suitable for battery-powered equipment, but also improves radio broadcast performance when used for mobile devices. The DVB-H standard has realized commercial deployment in Europe and trial operation in other regions of the world. Technology area
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