NTSC-J
NTSC-J is an analog television system and video display standard for the region of Japan.
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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.
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Marketing definition
The term NTSC-J is also used to distinguish regions in console video games, which use televisions. NTSC-J is used as the name of the video gaming region of Japan -hence the "J", South East Asia and South Korea (formerly part of SE Asia with Hong Kong, Taiwan, Macau etc.), the two latter being Korean or Chinese translated versions.
Games designated as part of this region will not run on hardware designated as part of the NTSC-US, PAL (or PAL-E, "E" stands for Europe) or NTSC-C (for continental China) mostly due to the regional differences of the PAL (SECAM was also used in the early 90s) and NTSC standards, but there is also a concern of copyright protection through regional lockout built into the video game systems and games themselves, as a same product can be edited by different publishers from a continent to another.
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