Digital multimedia broadcasting

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Digital multimedia broadcasting (DMB) is a digital

T-DMB

T-DMB is made for terrestrial transmissions on band III (

Smart DMB started in January 2013 in South Korea. Smart DMB has a VOD service and quality has been improved from 240p to 480p. Smart DMB is built in many Korean smartphones starting with the Galaxy Grand in January 2013.[8]

HD DMB

HD DMB started in August 2016 in South Korea. HD DMB has been improved from 240p to 720p. It uses HEVC.5 codec. There are currently^[when?] 6 HD DMB stations in Seoul. Smartphones integrated Qualcomm Snapdragon 801 or higher received firmware upgrade to support HD DMB.

Countries using DMB

Currently, DMB is being put into use in a number of countries, although mainly used in South Korea. Also see list of Countries using DAB/DMB.

South Korea

In 2005, South Korea became the world's first country to start S-DMB and T-DMB service on May 1 and December 1, respectively.^[9][10] In December 2006, T-DMB service in South Korea consists of, 7 TV channels, 12 radio channels, and 8 data channels. These are broadcast on six multiplexes in the VHF band on TV channels 8 and 12 (6 MHz raster). In October 2007, South Korea added broadcasting channel MBCNET to the DMB channel. But in 2010, this channel changed tnN go. In 2009 there were eight DMB video channels in Seoul, and six in other metropolitan cities. As of April 2013, S-DMB service in South Korea consists of 15 TV channels, 2 radio channels and 6 data channels.^[11]

South Korea has had Full T-DMB services including JSS (

Around one million receivers have been sold as of June 2006[update]. 14 million DMB receivers were sold including T-DMB and S-DMB in South Korea, and 40% of the new cell phones have the capability to see DMB.^[12]

Receivers are integrated in car

Since the advent of

Other countries

Some T-DMB trials are currently available or planned around Europe and other countries:

• In
  TV2 and Modern Times Group (MTG). The live channels were available in and around Greater Oslo.^[13][14]
• Germany's Mobiles Fernsehen Deutschland (MFD) launched the commercial T-DMB service "Watcha" in June 2006, in time for the World Cup 2006, marketed together with Samsung's P900 DMB Phone, the first DMB Phone in Europe. It was stopped in April 2008 as MFD is now favouring DVB-H, the European standard.^[15]
• DAB+.^[17]
• China in 2006 chose DAB as an industrial standard. Since 2007, DAB and T-DMB services broadcast in Beijing, Guangdong, Henan, Dalian, Yunnan, Liaoning, Hunan, Zhejiang, Anhui, and Shenzhen.^[18]
• In Mexico most cell phone carriers offer DMB broadcasting as part of their basic plans. As of 2008 the vast majority of Mexico receives DMB signals.
• Ghana is running a T-DMB service in Accra and Kumasi on mobile network since May 2008.^[19]
• Netherlands: MFD, T-Systems and private investors are planning a DMB service under the name Mobiel TV Nederland. Callmax will also deploy a DMB service on the L-Band frequency in the Netherlands.^[20]
• Indonesia is currently running a trial in Jakarta.
• Italy and Vatican City: RAI^[21] and Vatican Radio^[22] are currently running a trial some areas.
• CBC/Radio-Canada.^[23]
• TV3/MPB. Initially, the government was committed to deploying DVB-T
  for government-owned channels, however as of December 2009, RTM1 and 2, as well as all the radio channels, are available over Band III for DMB-T as in addition to DVB-T. Additionally, the TV3 DMB signal has moved to L Band. The TV3 DMB signals are still limited to the Damansara and Kuala Lumpur area, while the government owned DMB-T signals have a wider coverage and apparently covers most of the Klang Valley area. The government transmissions are part of a two-year trial that is part of a test that also involves the DAB and DAB+ digital radio standard.
• Cambodia in August 2010 chose T-DMB as the national standard for terrestrial digital broadcasting. TVK is currently running a trial.^[24]

DMB in automobiles

T-DMB works flawlessly in vehicles traveling up to 300 km/h.^{[citation needed]} In tunnels or underground areas, both television and radio broadcast is still available, though DMB may skip occasionally. In South Korea, some long-distance buses adopted T-DMB instead of satellite TV such as Sky TV. It works quite well even though the resolution is 240p, lower than satellite. In comparison, satellite is usually 480p or higher.^{[citation needed]}

See also

• 1seg
• CMMB
  )
• Digital Audio Broadcasting (DAB)
• Digital Radio Mondiale (DRM)
• Digital Video Broadcasting
  (DVB)
• ETSI Satellite Digital Radio (SDR)
• FMeXtra
• Handheld projector
• Internet radio device
• International Journal of Digital Multimedia Broadcasting
• Multimedia Broadcast Multicast Service
• Satellite radio
• Satellite television
• WiBro
• WiMAX
• WorldDMB
• DVB-H

References

External links

• Mobile Multimedia Broadcasting Standards: Technology and Practice, Ed. Fa-Long Luo, Springer, 2008)