While the United Kingdom has chosen the Eureka 147 standard of digital audio broadcasting ( DAB ) for creating a digital radio service, the United States has selected IBOC technology for its digital AM and FM stations.

The typical bandwidth for DAB programs is only 128 kbit / s using the first generation CODEC, less-robust MP2 standard which requires at least double that rate to be considered near-CD quality.

A new version of the Eureka-147 standard called DAB + has been implemented.

The Integrated Services Digital Broadcasting ( ISDB ) ( Japanese:, Tōgō dijitaru hōsō sābisu ) is a Japanese standard for digital television ( DTV ) and digital radio ( DAB ) used by the country's radio and Television networks.

The DAB 147 standard

Sveriges Radio also provides a number of channels through Digital audio broadcasting, using the DAB standard, and via the internet.

The lack of a common standard means that HD Radios cannot receive DAB format broadcasts of other countries and vice-versa, and that manufacturers must develop separate products for different countries, which typically are not dual-format.

In 2009, separate standard and parliamentary feeds were launched on digital terrestrial ( DAB +) radio.

The DVB-T digital TV standard ( and related DAB digital audio standard ) used throughout most of the rest of the world is more challenging — transmitter powers are lower, and many networks are set up in a " single frequency network " mode, in which all transmitters are synchronised in time and frequency.

The BBC National DAB multiplex is on the network's standard SFN, improving DAB coverage in North Kent and South London.

Satellite radio uses the 2. 3 GHz S band in North America and generally shares the 1. 4 GHz L band with local Digital Audio Broadcasting ( DAB ) stations elsewhere.

The most simple system is named DAB Digital Radio, for Digital Audio Broadcasting, and uses the public domain EUREKA 147 ( Band III ) system.

Germany and Holland use the DAB and DAB + systems, and France uses the L-Band system of DAB Digital Radio.

Unlike most other DAB systems, DRM uses in-band on-channel ( IBOC ) technology and can operate in a hybrid mode called Single Channel Simulcast, simulcasting both analog signal and digital signal.

The first generation DAB uses the MPEG-1 Audio Layer II ( MP2 ) audio codec which has less efficient compression than newer codecs.

Digital radio also uses channels and subchannels in the DAB format.

In the UK, Denmark, Norway and Switzerland, which are the leading countries with regard to implementing DAB, the first-generation MPEG-1 Audio Layer II ( MP2 ) codec stereo radio stations on DAB have a lower sound-quality than FM, prompting a number of complaints.

* Digital Audio Broadcasting ( DAB ) through Eureka Project 147 and the WorldDAB Forum ;

Thus in the UK and some other countries, the contemporary evolution of radio services is focused on Digital Audio Broadcasting ( DAB ) services or HD Radio, rather than satellite radio.

* Digital Audio Broadcasting ( DAB )

* Eureka 147, also known as the Digital Audio Broadcasting ( DAB ) system

Thus in the UK and some other countries, the contemporary evolution of radio services is focused on Digital Audio Broadcasting ( DAB ) services or HD Radio, rather than satellite radio.

Some international broadcasters have become available via Digital Audio Broadcasting ( DAB ) in Europe in the 1990s, and in a similar limited way in the Americas via in-band FM ( IBOC ) DAB systems in the US in the 2000s.

AM radio technology is simpler than Frequency Modulated ( FM ) radio, Digital Audio Broadcast ( DAB ), Satellite Radio or HD ( digital ) Radio.

* Digital Audio Broadcasting ( DAB )

It began as the Digital Audio Broadcast ( DAB ) project managed by Egon Meier-Engelen of the Deutsche Forschungs-und Versuchsanstalt für Luft-und Raumfahrt ( later on called Deutsches Zentrum für Luft-und Raumfahrt, German Aerospace Center ) in Germany.

The audio coding algorithm used by the Eureka 147 Digital Audio Broadcasting ( DAB ) system has been subject to the standardization process within the ISO / Moving Pictures Expert Group ( MPEG ) in 1989 – 94.

With the increased rollout of Digital Audio Broadcasting ( DAB ) between 1995 and 2002, BBC Radio launched several new digital-only stations BBC Radio 1Xtra, BBC Radio 6 Music and BBC 7 in 2002 on 16 August, 11 March and 15 December respectively — the first for " new black British music ", the second as a source of performance-based " alternative " music, the latter specialising in archive classic comedy shows, drama and children's programmes.

The " main " radio stations, available via both analogue ( FM and / or AM frequencies ) and Digital Audio Broadcasting ( DAB ), are:

* DAB ensemble, a group of Digital Audio Broadcasting broadcasters transmitting multiple digital radio channels on a single radio transmission

FSS systems provide various applications for subscribers, including: telephony, fax, television, high speed data communication services, Internet access, Satellite News Gathering ( SNG ), Digital Audio Broadcasting ( DAB ) and others.

As a digital medium, DRM can transmit other data besides the audio channels ( datacasting ) — as well as RDS-type metadata or program-associated data as Digital Audio Broadcasting ( DAB ) does.

* Digital Audio Broadcast ( DAB )

Frequency: DAB ( Digital Audio Broadcasting ) band from 4: 00 p. m. to 7: 00 p. m., local time.

Digital Audio Broadcasting ( DAB ) is typically done in the 1452 – 1492-MHz range as in most of the world, but other countries also use VHF and UHF bands.

CCETT / France Télécom R & D contributed to various international standards, such as ISO / IEC MPEG and JPEG standards or DAB and DVB standards.

It is designed to compress VHS-quality raw digital video and CD audio down to 1. 5 Mbit / s ( 26: 1 and 6: 1 compression ratios respectively ) without excessive quality loss, making video CDs, digital cable / satellite TV and digital audio broadcasting ( DAB ) possible.

The new digital-only ( Internet Streaming / Sky / freesat / Freeview / DAB ) radio stations are:

Their stance in universal suffrage was then similar to that of the Democratic Alliance for the Betterment of Hong Kong ( DAB ); namely, that universal suffrage should be implemented in or after 2012 rather than in 2007 / 8.

* Mixture. fr AM / FM / DAB database for France

Other issues with DAB include " downgrading " stations from stereo to monaural, in order to squeeze even more channels into the limited 1000 kbit / s bandwidth, smaller coverage of markets as compared to analog FM, radios that are overly expensive, poor reception inside vehicles or buildings, and a general lack of interest in DAB ( only 5 million units sold in the largest take up area of UK by mid-2007 ).

2011 the paneuropean organisation Community Media Forum Europe has recommended to the European Commission that DRM + should rather be used for small scale broadcasting ( local radio, community radio ) than DAB / DAB +.

BFBS Radio's three stations broadcast on a combination of local FM and AM analogue frequencies, via live streaming at bfbs. com / listen, on Sky Channel 0211, Freesat Channel 786, and since April 2009 on DAB Digital Radio in the UK.

It broadcasts from the studios of BBC East in The Forum, Norwich on 95. 1 FM ( Stoke Holy Cross ), 104. 4 FM ( Great Massingham ), 95. 6 FM ( West Runton, near Cromer ), 855 kHz AM / MW ( Postwick, east Norwich near the A47 ), 873 kHz AM / MW ( West Lynn, near the A47 and River Great Ouse ), DAB and through the internet using BBC iPlayer.

As part of a six week test to see who has the station on AM / FM or DAB

The DAB transmitters planned for the multiplex that will serve the Gloucestershire audience are due to be located at Churchdown Hill ( for the Severn Vale, including the Cheltenham / Gloucester conurbation ) and Ridge Hill.