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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. According to the ''Harvard Business Review'', the growing adoption of smartphones allowed users to watch as much mobile video in three days of the 2010 Winter Olympics as they watched throughout the entire 2008 Summer Olympics – an increase of 564%.〔(Looking for TV Genius? | Red Bee Media ) ( )〕 Early mobile television receivers were based on the old analog television signal system. They were the earliest televisions that could be placed in a coat pocket. The first was the Panasonic IC TV MODEL TR-001, introduced in 1970. The second was sold to the public by Clive Sinclair in January 1977. It was called the Microvision or the MTV-1. It had a two-inch (50 mm) CRT screen and was also the first television which could pick up signals in multiple countries. It measured 102×159×41 mm and was sold for less than £100 in the UK and for around $400 in the United States. The project took over ten years to develop and was funded by around £1.6 million in British government grants.〔(Clive's achievements ) Sinclair Research〕〔(Video and TV gear ), Retrothing.com〕 In later decades the term "mobile television" was associated with mobile telephones and other mobile digital devices. Mobile TV is among the features provided by many 3G phones. In 2002, South Korea became the first country in the world to have a commercial mobile TV CDMA IS95-C network, and mobile TV over 3G (CDMA2000 1X EVDO) also became available that same year. In 2005, South Korea became the first country in the world to have mobile TV. It started satellite DMB (S-DMB) and terrestrial DMB (T-DMB) services on May 1 and December 1. Today, South Korea and Japan are at the forefront of this developing sector.〔NYTimes.com via Yahoo! Finance: (Mobile TV Spreading in Europe and to the U.S. ), May 6, 2008〕 Mobile TV services were launched by the operator CSL during March 2006 in Hong Kong on the 3G network.〔3G UK: The service is based on the (Golden Dynamic Enterprises Ltd. )'s ("VOIR Portal" ) and follows the 3GPP standard 3G-324 M. The same service was also deployed to the Philippines in 2007.〕 BT in the United Kingdom was among the first companies outside South Korea to launch mobile TV in September 2006, although the service was abandoned less than a year later.〔ZDnet: (BT ditches mobile TV service ), 26 July 2007〕 The same happened to MFD Mobiles Fernsehen Deutschland, who launched their DMB-based service June 2006 in Germany, and stopped it in April 2008.〔Broadband TV news: (MFD hands back German T-DMB licence ), May 1, 2008〕 Also in June 2006, mobile operator 3 in Italy (part of Hutchison Whampoa) launched their mobile TV service, but opposed to their counterpart in Germany this was based on DVB-H.〔''The Register'': (DVB-H rockets ahead in Italy ), 28 July 2006〕 Sprint started offering the service in February 2006 and was the first US carrier to offer the service. In the US Verizon Wireless and more recently AT&T are offering the service. In South Korea, mobile TV is largely divided into satellite DMB (S-DMB) and terrestrial DMB (T-DMB). Although S-DMB initially had more content, T-DMB has gained much wider popularity because it is free and included as a feature in most mobile handsets sold in the country today. ==Challenges== Mobile TV usage can be divided into three classes: * "Fixed" – watched while not moving, possibly moved when not being watched * "Nomadic" – watched while moving slowly (e.g. walking) * "Mobile" – watched when moving quickly (e.g. in a car) Each of these pose different challenges. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Mobile television」の詳細全文を読む スポンサード リンク
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