Transcription in the linguistic sense is the systematic representation of language in written form. The source can either be utterances (speech or sign language) or preexisting text in another writing system.
Transcription should not be confused with translation, which means representing the meaning of a source language text in a target language (e.g. translating the meaning of an English text into Spanish), or with transliteration which means representing a text from one script in another (e.g. transliterating a Cyrillic text into the Latin script).
In the academic discipline of linguistics, transcription is an essential part of the methodologies of (among others) phonetics, conversation analysis, dialectology and sociolinguistics. It also plays an important role for several subfields of speech technology. Common examples for transcriptions outside academia are the proceedings of a court hearing such as a criminal trial (by a court reporter) or a physician's recorded voice notes (medical transcription). This article focuses on transcription in linguistics.
Broadly speaking, there are two possible approaches to linguistic transcription. Phonetic transcription focuses on phonetic and phonological properties of spoken language. Systems for phonetic transcription thus furnish rules for mapping individual sounds or phones to written symbols. Systems for orthographic transcription, by contrast, consist of rules for mapping spoken words onto written forms as prescribed by the orthography of a given language. Phonetic transcription operates with specially defined character sets, usually the International Phonetic Alphabet.