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Guide Plus
Guide Plus+ (in Europe), TV Guide On Screen and Guide Plus+ Gold (in North America) or G-Guide (in Japan) are brand names for an interactive electronic program guide (EPG) system that is used in consumer electronics products, such as television sets, DVD recorders, personal video recorders, and other digital television devices. It offers interactive on-screen program listings that enable viewers to navigate, sort, select and schedule television programming for viewing and recording. The differing names are only used for marketing purposes – the entire system is owned by Rovi Corporation, the successor to Gemstar-TV Guide International.
==Technical overview==
The system was launched in the United States and Japan in the mid-1990s, and began to be deployed throughout Europe during the 2000s. It is also available for broadcast and cable services in Canada, France, Germany, Spain, the United Kingdom, Austria, Switzerland, the Netherlands, Belgium and Italy.
Companies that manufacture products that are compatible with the system include those made by Channel Master, JVC, Matsushita/Panasonic, Thomson (RCA, GE and ProScan), Samsung, Sharp, Sony, LG Group and Toshiba. Since the service is advertiser-supported, the updated program listings are provided to users free-of-charge, regardless of whether they receive their television signal over-the-air or via cable or satellite television. Gemstar also produced EPG computer software bundled with analog NTSC TV tuner cards made by ATI Technologies, particularly the TV Wonder and All-in-Wonder lines. ATI later partnered with TitanTV to provide its digital ATSC cards.
The original analog service uses the vertical blanking interval (VBI) of host television stations that datacast the service, similar to the manner that closed captioning and teletext are broadcast. This can take 24 hours to download on the initial setup, because the information is delivered at a low bitrate. In late 2012, Rovi issued a notice to its North American users through the Guide Plus+, TV Guide On Screen and 'Rovi Guide' message system that broadcast transmission of the service would cease beginning in November 2012, and be discontinued gradually through April 2013.〔Retrieved from http://www.avsforum.com/t/1122914/lightbox/post/22575551/id/88163.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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