McCune-Reischauer

McCune–Reischauer romanization (pronunciation: /məˈkuːn ˈraɪ.ʃaʊ.ər/) is one of the two most widely used Korean language romanization systems. A modified version of McCune–Reischauer was the official romanization system in South Korea until 2000, when it was replaced by the Revised Romanization of Korean system. A variant of McCune–Reischauer is still used as the official system in North Korea.

The system was created in 1937 by George M. McCune and Edwin O. Reischauer. With a few exceptions, it attempts not to transliterate Korean hangul but to represent the phonetic pronunciation. McCune–Reischauer is widely used outside Korea.

Korean has phonologically no distinction between voiced and voiceless consonants, but it phonetically distinguishes them. Aspirated consonants like p', k', and t' are distinguished by apostrophe from unaspirated ones, which may be falsely understood as a separator between syllables (as in 뒤차기 → twich'agi, which consists of the syllables twi, ch'a and gi). The apostrophe is also used to mark transcriptions of ㄴㄱ (n'g) as opposed to ㅇㅇ (ng): 잔금 → chan'gŭm vs. 장음 → changŭm).

...
Wikipedia