Digital television (DTV) is the transmission of television audiovisual signals using digital encoding, in contrast to the earlier analog television technology which used analog signals. At the time of its development it was considered an innovative advancement and represented the first significant evolution in television technology since color television in the 1950s. Modern digital television is transmitted in high definition (HDTV) with greater resolution than analog TV. It typically uses a widescreen aspect ratio in contrast to the narrower format of analog TV. It makes more economical use of scarce radio spectrum space; it can transmit up to seven channels in the same bandwidth as a single analog channel, and provides many new features that analog television cannot. A transition from analog to digital broadcasting began around 2006. Different digital television broadcasting standards have been adopted in different parts of the world; below are the more widely used standards:
Digital audio broadcasting (DAB) is a digital radio standard for broadcasting digital audio radio services, used in many countries around the world, though not North America.
Digital radio is the use of digital technology to transmit or receive across the radio spectrum. Digital transmission by radio waves includes digital broadcasting, and especially digital audio radio services.
SK Telecom Co., Ltd. is a South Korean wireless telecommunications operator; it is part of the SK Group, one of the country's largest chaebols.
Malaysian television broadcasting was introduced on 28 December 1963. Colour television was introduced on 28 December 1978. Full-time colour transmissions were officially inaugurated on New Year's Day 1982. There are currently 8 national free-to-air terrestrial television stations in Malaysia and 2 national pay subscription television stations in Malaysia.
Munhwa Broadcasting Corporation is one of the leading South Korean television and radio network companies. Munhwa is the Korean word for "culture". Its flagship terrestrial television station MBC TV is Channel 11 (LCN) for Digital.
DVB-H is one of three prevalent mobile TV formats. It is a technical specification for bringing broadcast services to mobile handsets. DVB-H was formally adopted as ETSI standard EN 302 304 in November 2004. The DVB-H specification can be downloaded from the official DVB-H website. From March 2008, DVB-H is officially endorsed by the European Union as the "preferred technology for terrestrial mobile broadcasting". The major competitors of this technology are Qualcomm's MediaFLO system, the 3G cellular system based MBMS mobile-TV standard, and the ATSC-M/H format in the U.S. DVB-SH now and DVB-NGH in the future are possible enhancements to DVB-H, providing improved spectral efficiency and better modulation flexibility. DVB-H has been a commercial failure, and the service is no longer on-air. Ukraine was the last country with a nationwide broadcast in DVB-H.
Gunnar Garfors is a Norwegian media professional, traveller, and author. He has worked with broadcasting and new media developments since 2001 and has spoken on these topics at seminars and conferences to over 20 countries around the world. He strongly advocates the necessity of broadcasting as a distribution technology, in parallel to the Internet.
TU Media Corp. is South Korea's first mobile broadcast service company headquartered in Seoul, South Korea. Its name stands for "TV for you." It was established in 2003 as a subsidiary of SK Telecom. SK Telecom owns 44% of the company's shares. Currently about 1.3 million people are subscribers to the service.
MediaFLO was a technology developed by Qualcomm for transmitting audio, video and data to portable devices such as mobile phones and personal televisions, used for mobile television. In the United States, the service powered by this technology was branded as FLO TV.
KNMT, virtual channel 24, is a TBN owned-and-operated television station licensed to Portland, Oregon, United States. The station is owned by the Trinity Broadcasting Network. KNMT's studios and offices are located on Northeast 74th Street in Portland, and its transmitter is located in the Sylvan-Highlands section of the city, near the West Hills of Portland. The station is available on Comcast cable channel 20, and is carried on several other cable providers in the area.
S-DMB (Satellite-DMB) is a hybrid version of the Digital Multimedia Broadcasting. The S-DMB uses the S band (2170-2200 MHz) of IMT-2000. and delivers around 18 channels at 128 kbit/s in 15 MHz. It incorporates a high power geostationary satellite, the MBSat 1. For outdoor and light indoor coverage is integrated with a terrestrial repeater network for indoor coverage in urban areas.
Mobile television is television watched on a small handheld or mobile device. It includes pay TV service delivered via mobile phone networks or received free-to-air via terrestrial television stations. Regular broadcast standards or special mobile TV transmission formats can be used. Additional features include downloading TV programs and podcasts from the Internet and storing programming for later viewing.
DTMB is the TV standard for mobile and fixed terminals used in the Mainland China, Cuba, Hong Kong and Macau.
Nuevo Mundo Televisión (NMTV) was a Canadian Category B Spanish language specialty channel owned by NMTV Inc. Nuevo Mundo Televisión broadcast general entertainment and lifestyle programming including news, television dramas, talk shows, and music.
ENENSYS is a manufacturer of Broadcast Network Equipment and Test & Monitoring Equipment for digital broadcast. The company provides products for the following fields:
The radio technology known as Digital Audio Broadcasting, and its TV sibling, Digital Multimedia Broadcasting (DMB), is being operated in several regions worldwide, either in the form of full services, or as feasibility studies.
Mobile TV Format is a colloquial and collective name for technology standards set out for broadcasting TV services to mobile devices, mostly mobile handsets for now. Currently, there are four prevalent formats known as DMB, DVB-H, OneSeg and MediaFLO. As of December 2007, ITU approved T-DMB, DVB-H, OneSeg and MediaFLO as the global standard for real-time mobile video and audio broadcasting. Thus far, none of the four formats has secured a dominant position in the global market, except in their respective home markets.
North Metro TV, also known as "NMTV", is a community and Public, educational, and government access (PEG) television station servicing the cities of Blaine, Centerville, Circle Pines, Ham Lake, Lexington, Lino Lakes, and Spring Lake Park in the Twin Cities Northern Metro area in Minnesota.
Digital multimedia broadcasting (DMB) is a digital radio transmission technology developed in South Korea as part of the national IT project for sending multimedia such as TV, radio and datacasting to mobile devices such as mobile phones, laptops and GPS navigation systems. This technology, sometimes known as mobile TV, should not be confused with Digital Audio Broadcasting which was developed as a research project for the European Union. DMB was developed in South Korea as the next generation digital technology to replace FM radio, but the technological foundations were laid by Prof. Dr. Gert Siegle and Dr. Hamed Amor at Robert Bosch GmbH in Germany. The world's first official mobile TV service started in South Korea in May 2005, although trials were available much earlier. It can operate via satellite (S-DMB) or terrestrial (T-DMB) transmission. DMB has also some similarities with the main competing mobile TV standard, DVB-H.
