CD+G (also known as
CD-G,
CD+Graphics and
TV-Graphics) is an extension of the
compact disc standard that can present low-resolution graphics alongside the audio data on the disc when played on a compatible device. CD+G discs are often used for
karaoke machines, which use this functionality to present on-screen lyrics for the song contained on the disc. The CD+G specifications were published by
Philips and
Sony in an updated revision of the
Red Book specifications.