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NTSC-J is the discontinued analog television system and video display standard for the region of Japan that ceased operations in 44 of the country's 47 prefectures on July 24, 2011. Analog broadcasting ended on March 31, 2012 in the three prefectures devastated by the 2011 Tohoku earthquake (Iwate, Miyagi, Fukushima). While NTSC-M is an official standard, "J" is more a colloquial indicator as used in Marketing definition (below) but not an official term. ==Technical definition== It is based on 'regular' NTSC, but is slightly different. The black level and blanking level of the NTSC-J signal are identical (at 0 IRE), as they are in PAL, another video standard, while in American NTSC, black level is slightly higher (7.5 IRE) than blanking level. Because of the way this appears in the waveform, the higher black level is also called pedestal. Since the difference is quite small, a slight change of the brightness setting is all that is required to enjoy the "other" variant of NTSC on any set as it is supposed to be. The over-the-air RF frequencies in use in Japan do not match those of the US NTSC standard; there are also international differences in the frequency allocations for other services such as FM radio. The encoding of the stereo subcarrier also differs between NTSC-M/MTS and the Japanese broadcast standards. 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「NTSC-J」の詳細全文を読む スポンサード リンク
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