Subtitle translation (or header translation) is a method of presenting translated text in cinema, television and video as well as a way of providing text access to hearing-impaired individuals.
In this method, the bottom of the screen features subtitles containing the text originally heard in the soundtrack or its translation to a different language, often with written description of other sounds in the soundtrack.
In rare cases, subtitles also include comments that assist viewers in fully understanding certain aspects of the video which are affected by cultural differences.