Between DAB and DVB from Wiki, Try World Radio and TV tuner below!

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^[1].

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 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.^[2][3][4]

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 and Switzerland 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].

Digital Video Broadcasting (DVB) is a suite of internationally accepted open standards for digital television. DVB standards are maintained by the DVB Project, an industry consortium with more than 270 members, and they are published by a Joint Technical Committee (JTC) of European Telecommunications Standards Institute (ETSI), European Committee for Electrotechnical Standardization (CENELEC) and European Broadcasting Union (EBU). The interaction of the DVB sub-standards is described in the DVB Cookbook (DVB-Cook).

DVB systems distribute data using a variety of approaches, including by satellite (DVB-S, DVB-S2 and DVB-SH; also DVB-SMATV for distribution via SMATV); cable (DVB-C); terrestrial television (DVB-T, DVB-T2) and digital terrestrial television for handhelds (DVB-H); and via microwave using DTT (DVB-MT), the MMDS (DVB-MC), and/or MVDS standards (DVB-MS)

These standards define the physical layer and data link layer of the distribution system. Devices interact with the physical layer via a synchronous parallel interface (SPI), synchronous serial interface (SSI), or asynchronous serial interface (ASI). All data is transmitted in MPEG-2 transport streams with some additional constraints (DVB-MPEG). A standard for temporally-compressed distribution to mobile devices (DVB-H) was published in November 2004.

These distribution systems differ mainly in the modulation schemes used and error correcting codes used, due to the different technical constraints. DVB-S (SHF) uses QPSK, 8PSK or 16-QAM. DVB-S2 uses QPSK, 8PSK, 16APSK or 32APSK, at the broadcasters decision. QPSK and 8PSK are the only versions regularly used. DVB-C (VHF/UHF) uses QAM: 16-QAM, 32-QAM, 64-QAM, 128-QAM or 256-QAM. Lastly, DVB-T (VHF/UHF) uses 16-QAM or 64-QAM (or QPSK) in combination with COFDM and can support hierarchical modulation.

The DVB-T2 standard will be published after march 2008 and is expected to be approved and submitted to ETSI during 2008.

The DVB-T2 standard will give more-robust TV reception and increase the possible bit-rate by over 30% for single transmitters (as in the UK) and is expected to increase the max bit-rate by over 50% in large SFN (as in Germany, Sweden...).

Besides audio and video transmission, DVB also defines data connections (DVB-DATA - EN 301 192) with return channels (DVB-RC) for several media (DECT, GSM, PSTN/ISDN, satellite etc.) and protocols (DVB-IPTV: Internet Protocol; DVB-NPI: network protocol independent).

Older technologies such as teletext (DVB-TXT) and vertical blanking interval data (DVB-VBI) are also supported by the standards to ease conversion. However for many applications more advanced alternatives like DVB-SUB for sub-titling are available.

You all may try this technology by installing this World Radio and TV Tuner software for free trials. Or you just wanna rip your favourite music from different Internet radio stations over the world.

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DAB, DAB+ and DMB for Indonesia

The regulator and MNC (PT Media Nusantara Citra) launched DMB trials in Jakarta in 2006. In the third quarter of 2007 the PST Indonesian electronics company, PT Agis, IPTV systems integrator, Broadband Network Systems, and Toshiba have joined together to build a nationwide DMB service in Indonesia. The intention is to launch the service in 2008 and this group are currently talking to mobile operators and content provides to fully explore the opportunities available. The group will build the network and then join with video providers for content and mobile operators for distribution. The benefit of using DMB in Indonesia is that a single frequency could be used to cover the whole of the country.

Indonesia has shown great interest in using DMB for Mobile TV and has been progressed faster than any other country in the South East Asian region. Telco operators are expecting that Mobile TV will allow them to differentiate their overall mobile service positioning and help generate new revenue streams. Similarly, content providers and TV broadcasters are planning to use Mobile TV to open up new channel distribution platforms, with targeted content and new advertising schemes. Both PT Media Nusantara Citra (MNC) and DMB-N were granted frequencies and licenses for Mobile TV in Jakarta.

MNC is the largest and only integrated media company in Indonesia. They have been running DMB trials in Jakarta since 2006, with 1 DAB audio and 1 DMB video service using Band-III frequencies. MNC, at the same time, is also the operator of DVB-H. Mobile TV using DVB-H will be marketed as an expensive service, as a result of the increased investment in the network. DVB-H offerings will include around 15 Pay TV channels. However, DMB Mobile TV will be marketed as an affordable product which will be targeted at the mass market. Services will be on a subscription basis but will cost much less than the DVB-H services.

DMBN is a joint company of the local broadcasters and ETRI, a Korean research institute, to implement mobile TV services in Indonesia. DMBN is now running trials in Jakarta and plan for further testing in Bandung, Medan and Surabaya for mobile TV, and DAB services in the near future. It is planned to lunch in may 2008 with one multiplexer.

Both operators plan to launch Mobile TV services in Jakarta in the first quarter of 2008. It is expected that there will be a wide selection of mobile phones and other devices from South Korea.

Originally posted at http://www.worlddab.org/country_information/indonesia

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Another interesting site

Hey ya! Another interesting site for planning digital broadcasting with simple software. ATDI software from http://www.atdi.com/ can be used across current Analogue and Digital Broadcast Technologies in both TV and radio to optimise and roll out networks. Tools are included within ATDI planning tools for future technologies such as T-DAB and DTTV. The methods and sub-tools within tools such as ICS Telecom have come from our work with various broadcast customers including several national broadcast organisations as well as systems integrators supplying turnkey broadcast solutions. These customers have either used our tools or have contracted ATDI to carry out work on their behalf to furthers their development of their broadcast networks.

ATDI's software tools work using cartographic information in 2D and 3D. ATDI always offers its customer a complete solution including the software and the relevant cartography:
the topography of the terrain (Digital Elevation Model, also known as Digital Terrain Model), used to perform calculations
an image (Digitised Maps, Satellite Views or Aerial Pictures), used to display the coverage results in an understandable way.

On their sites, we can also download many resources such as whitepapers and journal paper for OFDM concepts and implementation. It's really a cool learning resource.

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