
DVB-H stands for Digital Video Broadcasting - Handheld. DVB-H is a technical specification for bringing broadcast services to handheld receivers and was formally adopted as ETSI standard EN 302 304 in November 2004. The DVB-H specification (EN 302 304) can be downloaded from the DVB-H Online website. The major competitor of this technology is DMB.
Technical Explanation
DVB-H Frame structureDVB-H is the latest development within the set of DVB transmission standards. DVB-H technology adapts the successful DVB-T system for digital terrestrial television to the specific requirements of handheld, battery-powered receivers. DVB-H can offer a downstream channel at high data rates which can be used standalone or as an enhancement of mobile telecoms networks which many typical handheld terminals are able to access anyway. Time slicing technology is employed to reduce power consumption for small handheld terminals. IP datagrams are transmitted as data bursts in small time slots. Each burst may contain up to 2 Mbits of data (including parity bits). There are 64 parity bits for each 191 data bits, protected by Reed-Solomon codes. The front end of the receiver switches on only for the time interval when the data burst of a selected service is on air. Within this short period of time a high data rate is received which can be stored in a buffer.
DVB-H Service Launches
In France, nationwide service launch is planned in 2007.
In Finland, the license to operate a DVB-H network was awarded to Digita in March 2006. In May 2006 they announced that they had signed a contract with Nokia to use its DVB-H platform for the service. The network will cover almost 30% of the country by the end of 2006, with the service launching in most of the major markets.
In Italy, 3 Italia launched nationwide services in May 2006, both TIM and Mediaset in June 2006, Vodafone is expected in September or October.
In Germany, nationwide service launch is planned in 2007.
In Spain, nationwide service launch is planned in 2007.
In the USA, a nationwide service will be rolled out by Modeo a company owned by Crown Castle Mobile Media. The service will begin in 2006 in New York City and will roll out to the top thirty markets in the USA during 2007. Modeo owns 5MHz of spectrum nationwide at 1600MHz. At the NAB trade show in April 2006, a second service launch was announced by SES Americom and Aloha Partners. Titled Hiwire Mobile Television, the service is set to begin trials in Las Vegas in Q4 2006. Hiwire owns two 6 MHz channels of spectrum at 700MHz covering most of the country.
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