Example here, the name in Khmer is កុសល ចំរើន the tool provide 3 kinds of written :
- Character Model: e.g. KOSOL CHAMREUN
- Syllable Model: e.g. KOSOL CHAMRAEUN
- SMT Model(*): e.g. KOL CHAMROEUN
So if you are looking for the Khmer transliteration tool, I think this research r&d tool, you can try: http://rnd.niptict.edu.kh/tran/.
(*) I don't really find a source of translation, I think "SMT" should stand for: Statistical Machine Translation which is in another research by this organization.