What is DAB ? 

Hi Priya

DAB or Digital Audio Broadcasting is also known as digital radio or high-definition radio. With DAB, a regular analog radio signal is converted to a digital signal and translated over a regular FM or AM frequency range. Users must have a receiver equipped to handle the DAB. Broadcasters use varying degrees of compression which can cause the audio quality to vary greatly.

Thanks n regards

Suparn@

Answered by Suparna at 11:29 PM on September 27, 2008

well, DAB stands for Digital Audio Broadcasting,also known as digital radio. This is the future of radio and it will give you a clear digital sound and access to a wide range of digital radio stations.It's is also known as digital radio or high-definition radio. With DAB, a regular analog radio signal is converted to a digital signal and translated over a regular FM or AM frequency range. Users must have a receiver equipped to handle the DAB.

Answered by Satya ~ at 6:00 PM on September 05, 2008

Digital Audio Broadcasting (DAB), also known as Eureka 147, is a digital radio technology for broadcasting radio stations, used in several countries, particularly in Europe. As of 2006, approximately 1,000 stations worldwide broadcast in the DAB format.

The DAB standard was designed in the 1980s, and receivers have been available in many countries for several years. Proponents claim the standard offers several benefits over existing analogue FM radio, such as higher-fidelity audio, more stations in the same broadcast spectrum, and increased resistance to noise, multipath, fading, and co-channel interference. However, listening tests carried out by experts in the field of audio have shown that the audio quality on DAB is lower than on FM in the UK, which, with 7m sales, is the country that accounts for the vast majority of global DAB sales-to-date, due to 98% of stereo stations using a bit rate of 128 kbit/s with the MP2 audio codec, which is unable to match the audio quality provided by FM.

An upgraded version of the system was released in February 2007, which is called DAB+. DAB+ is not backward-compatible with DAB, which means that only receivers that support the new standard will be able to receive DAB+ broadcasts. DAB+ is 2 - 3 times more efficient than DAB due to the adoption of the AAC+ audio codec[5], which means that DAB+ can provide higher audio quality and more radio stations than DAB allows. Reception quality will also be more robust on DAB+ than on DAB due to the addition of Reed-Solomon error correction coding.

Italy has started transmitting DAB+ stations, Malta, Switzerland and Hungary are due to launch DAB+ stations in 2008, and Australia and Germany planning on launching DAB+ in 2009. The radio industry in the UK is expecting DAB+ stations to launch between 2010 - 2013[6], and podcast services using the DAB+ format will be launched in the UK in 2009[7].

Answered by alok at 12:48 PM on September 05, 2008

well, Digital Audio Broadcasting or 'DAB digital radio' has been developed by a consortium of manufacturers and broadcasters. The BBC pioneered DAB digital radio and was the first broadcaster in the UK to build a transmission network and start broadcasting in 1995.
DAB radio works by using both MPEG and COFDM (Coded Orthogonal Frequency Division Multiplex) technology which converts the music or speech from analogue signal into digital (binary) code.
source site: http://www.bbc.co.uk/radio/hel p/faq/what_is_dab.shtml

Answered by Nidhi Singh at 5:13 PM on September 04, 2008

From my point of view ,Digital audio broadcasting (DAB), also known as digital radio and high-definition radio, is audio broadcasting in which analog audio is converted into a digital signal and transmitted on an assigned channel in the AM or (more usually) FM frequency range. DAB is said to offer compact disc (CD)- quality audio on the FM (frequency modulation) broadcast band and to offer FM-quality audio on the AM (amplitude modulation) broadcast band. The technology was first deployed in the United Kingdom in 1995, and has become common throughout Europe.
Digital audio broadcast signals are transmitted in-band, on-channel (IBOC). Several stations can be carried within the same frequency spectrum. Listeners must have a receiver equipped to handle DAB signals. At the transmitting site, the signal is compressed using MPEG algorithms and modulated using coded orthogonal frequency division multiplexing (COFDM). A digital signal offers several advantages over conventional analog transmission, including improved sound quality, reduced fading and multipath effects, enhanced immunity to weather, noise, and other interference, and expansion of the listener base by increasing the number of stations that can broadcast within a given frequency band.

A DAB receiver includes a small display that provides information about the audio content in much the same way that the menu screen provides an overview of programs in digital television (DTV). Some DAB stations provide up-to-the-minute news, sports, and weather headlines or bulletins in a scrolled text format on the display. Using the DAB information, it may also be possible to see what song is coming up next.

Answered by Madhurima at 8:09 PM on September 03, 2008

DAB stands for Digital Audio Broadcasting and is the future of radio broadcasting.

It's interference free and features a wide and varied choice of stations broadcasting both nationally and locally.

If you live in a poor signal area where the FM signal is barely audible, then DAB may offer you better reception.

DAB is a new technology which broadcasts audio and data services that can be received in over 85% of the United Kingdom. With the right kind of tuner, listeners can receive a choice of stations without hiss or fade unlike conventional FM and AM receivers.

No matter where you are in the UK, whether on holiday in the Lake District, on a mountain or driving in your car, you can listen to digital radio without hassle. The signal is either there or not at all.

DAB offers listeners more choice of programmes from rock, pop, classical and easy listening, to spoken word, news and more. So whatever your mood, there is always something on DAB for you - subject to availability.

Answered by Shobhit at 4:54 PM on September 03, 2008

Digital audio broadcasting (DAB), also known as digital radio and high-definition radio, is audio broadcasting in which analog audio is converted into a digital signal and transmitted on an assigned channel in the AM or (more usually) FM frequency range. DAB is said to offer compact disc (CD)- quality audio on the FM (frequency modulation) broadcast band and to offer FM-quality audio on the AM (amplitude modulation) broadcast band. The technology was first deployed in the United Kingdom in 1995, and has become common throughout Europe.
Digital audio broadcast signals are transmitted in-band, on-channel (IBOC). Several stations can be carried within the same frequency spectrum. Listeners must have a receiver equipped to handle DAB signals. At the transmitting site, the signal is compressed using MPEG algorithms and modulated using coded orthogonal frequency division multiplexing (COFDM). A digital signal offers several advantages over conventional analog transmission, including improved sound quality, reduced fading and multipath effects, enhanced immunity to weather, noise, and other interference, and expansion of the listener base by increasing the number of stations that can broadcast within a given frequency band.

A DAB receiver includes a small display that provides information about the audio content in much the same way that the menu screen provides an overview of programs in digital television (DTV). Some DAB stations provide up-to-the-minute news, sports, and weather headlines or bulletins in a scrolled text format on the display. Using the DAB information, it may also be possible to see what song is coming up next.

Answered by Nishu's at 2:34 PM on September 03, 2008

DAB stands for Digital Audio Broadcasting and is the future of radio broadcasting.

It's interference free and features a wide and varied choice of stations broadcasting both nationally and locally.

If you live in a poor signal area where the FM signal is barely audible, then DAB may offer you better reception.

DAB is a new technology which broadcasts audio and data services that can be received in over 85% of the United Kingdom. With the right kind of tuner, listeners can receive a choice of stations without hiss or fade unlike conventional FM and AM receivers.

No matter where you are in the UK, whether on holiday in the Lake District, on a mountain or driving in your car, you can listen to digital radio without hassle. The signal is either there or not at all.

DAB offers listeners more choice of programmes from rock, pop, classical and easy listening, to spoken word, news and more. So whatever your mood, there is always something on DAB for you - subject to availability.

Answered by Ashish Yadav at 2:30 PM on September 03, 2008

well;
DAB stands for Digital Audio Broadcasting and is a method for the digital transmission of radio signals. DAB is transmitted terrestrially and can thus be received via a simple DAB digital radio with a stub antenna. Thanks to DAB, no satellite dish, cable network connection or internet access is required anymore to receive a greater choice of radio programmes. Many of today's DAB digital radios are portable devices and can also receive 'regular' FM radio. With a DAB in-car receiver the digital variety can also be enjoyed on the move.

Answered by Kishore at 1:54 PM on September 03, 2008

As far as I am concern,Digital audio broadcasting (DAB), also known as digital radio and high-definition radio, is audio broadcasting in which analog audio is converted into a digital signal and transmitted on an assigned channel in the AM or (more usually) FM frequency range.

DAB is said to offer compact disc (CD)- quality audio on the FM (frequency modulation) broadcast band and to offer FM-quality audio on the AM (amplitude modulation) broadcast band. The technology was first deployed in the United Kingdom in 1995, and has become common throughout Europe.

Digital audio broadcast signals are transmitted in-band, on-channel (IBOC). Several stations can be carried within the same frequency spectrum. Listeners must have a receiver equipped to handle DAB signals. At the transmitting site, the signal is compressed using MPEG algorithms and modulated using coded orthogonal frequency division multiplexing (COFDM).

A digital signal offers several advantages over conventional analog transmission, including improved sound quality, reduced fading and multipath effects, enhanced immunity to weather, noise, and other interference, and expansion of the listener base by increasing the number of stations that can broadcast within a given frequency band.

Answered by Sharad Singh at 1:43 PM on September 03, 2008