Voice-over (also known as off-camera or off-stage commentary) is a production technique where a voice that is not part of the narrative is used in a radio, television production, film-making, theater, or other presentations.

Basically, transcription involves listening to a recording of something and putting it into writing.

Time-code is a reference number given to a specific point in time within a media file. They’re added to a film in order to facilitate the logging of a film.