fm transmitter
2007
Digital Audio Broadcasting system was designed in the late 1980s. Its main purpose is to provide radio at CD-quality. DAB is proposed by the British Broadcasting Corporation. China ran a trial in Fo Shan city about this DAB.
Digital Audio Broadcasting is also known as Eureka 147. DAB is ETSI standard.It is High definition radio project. It is a digital radio technology.
It is most popular in UK and European Countries. Updated version of DAB is released in 2007.Updated version is call as DAB+ But DAB sounds worse than FM.Main reason for bad sound quality is broadcasters using bit rate levels that are too low.
Digital Audio Broadcasting is a Single Frequency Network All transmitters send an unique signal.So tuning is done automatically. A 1.5 MHz for 10 services cover entire country using a single frequency network. So it is 15-20 times more efficient.
Normal Audio has 24ms MP2 frames whereas DAB frames are 96ms. Uses of DAB:
Sound is CD quality
Multiplex
Dynamic Range Control
Digital Radio:
Digital Radio is the future radio. Switzerland is the first country which is developed this Digital Radio by 90% . It is well suited for radio receiving on the move in the outside. Main feature with this digital radio is when you switch NO it will automatically detect date,time and no.of available radio channels.
So no more tuning of different stations. DAB has good reception quality.
Digital Radio has two standards:
DAB = digital Radio in MP2
DAB+ = digital radio in new MP4
Digital Audio Broadcasting system was designed in the late 1980s.
Its main purpose is to provide radio at CD-quality. DAB is proposed by the British Broadcasting Corporation. China ran a trial in Fo Shan city about this DAB.
Digital Audio Broadcasting is also known as Eureka 147. DAB is ETSI standard.It is High definition radio project. It is a digital radio technology.
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