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The only objection to embrace high-definition broadcasting and satellite digital broadcasting of the United States and select a new broadcast format transfer method Japan.ĭAB main advantage is mobile, portable and multimedia broadcasting receiving apparatus can be divided into vehicle type, household type, portable type and a computer to receive cards. In 1994, Eureka-147 is an international standard adopted today, most of the world is not to achieve this standard is being tested to this standard. The current DAB system can be divided into the world, the European Eureka-147, US IBOC (In-Band On-Channel) and the French DRM (Digital Radio Mondiale), as well as Japan and some other countries develop their own DAB system, using our current pilot Eureka-147 system.ĭAB digital radio is an association made up of 12 members - the famous EUREKA-147 being developed, the original name of the system is a digital audio broadcasting (DAB), and has been used as a criterion for distinguishing real DAB radio and other audio broadcasting. It requires the use of complex frequency networkĭAB's original intention was to change traditional broadcast technology to improve the sound quality of the broadcast and provide high-speed mobile reception performance.ĭAB has become Britain and other Western European countries digital audio broadcasting standard, most taxis are equipped with DAB receiver.
Through better compression techniques, a channel can simultaneously transmit multiple sets of near CD-quality programĪ channel can only send a standard quality audio program
The sound quality is affected by terrain noise, other signal interference Without the interference of multipath propagation, ensure quality Voice, text, pictures, video clips and other multimedia content In this sense, DAB longer a purely broadcasting system only transmits audio signals, already belongs to Digital Multimedia Broadcasting DMB.
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Within a certain range from multipath interference, suitable for use in a highly mobile environment, such as a car.ĭAB and traditional broadcasting (FM, AM) The biggest difference is that DAB can receive multimedia messages, including text, data, images, video, and even real-time information updates.īecause digital features, DAB can transmit any text or even an image signal, enabling the DAB radio and TV are connected, in order to restore the digital signal in the video image. DAB with anti-noise, interference, resistance to decay, zero signal distortion for high speed mobile reception and so on. Satellite digital audio broadcasting DAB-S three forms:ġ) The European Eureka-147 system, use the 1452 - 1492MHz (L Band), currently only supports terrestrial digital audio broadcasting DAB-T use did not launch a satellite Ģ) US WorldSpace (WorldSpace) satellite digital audio radio service (SDARS, Satelite Digital Audio Radio Service) system, using 1467 - 1492MHz (L Band)ģ) US Sirius XM's Satellite Digital Audio Radio Service (SDARS) systems, use 2320 - 2345MHz (S Band)ĭAB is (Digital Audio Broadcasting) shorthand for digital audio broadcasting DAB is following the AM, FM broadcasting traditional analog third-generation broadcasting.Ĭompared to traditional analog broadcasts, DAB broadcast can provide higher quality, lower transmission power can be realized, covering a wider area. DAB is (Digital Audio Broadcasting) shorthand for digital audio broadcasting DAB is following the AM, FM broadcasting traditional analog broadcast the third generation
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