Subtitling is text that is either burned into film, composited with video or generated during playback of a DVD. Typically, it includes only a translation or transcription of the voice track of the program. Closed captioning, as the name implies, is carried in the closed portion of a broadcast, cable or DVD video signal. It includes not only a transcription or translation of the voice track but, because it is expressly intended to aid the hearing impaired, it also includes notation to account for music and sound effects.