||Typically up to 700 MB (up to 80 minutes audio)
||780 nm wavelength semiconductor laser
||Philips & Sony
||Audio, image, and data storage
Optical media types
- Compact Disc (CD): CD-DA, CD-ROM, CD-R, CD-RW, 5.1 Music Disc, Super Audio CD (SACD), Photo CD, CD Video (CDV), Video CD (VCD), Super Video CD (SVCD), CD+G, CD-Text, CD-ROM XA, CD-i
- DVD: DVD-R, DVD+R, DVD-R DL, DVD+R DL, DVD-R DS, DVD+R DS, DVD-RW, DVD+RW, DVD-RAM, DVD-D, DVD-A, HVD, EcoDisc
- Blu-ray Disc (BD): BD-R & BD-RE
- Universal Media Disc (UMD)
- Enhanced Versatile Disc (EVD)
- Forward Versatile Disc (FVD)
- Holographic Versatile Disc (HVD)
- China Blue High-definition Disc (CBHD)
- HD DVD: HD DVD-R, HD DVD-RW, HD DVD-RAM
- High definition Versatile Multilayer Disc (HD VMD)
- MiniDisc: MD, Hi-MD
- Laserdisc: LD, LD-ROM
- Video Single Disc (VSD)
- Ultra Density Optical (UDO)
- Stacked Volumetric Optical Disk (SVOD)
- Five dimensional disc (5D DVD)
- Nintendo optical disc (NOD)
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 utilize 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.
The first CD to be released with CD+G graphics was Eat or Be Eaten by Firesign Theatre in 1985. The CD+EG is a similar format that allows for better graphics, but has been used very rarely.
Along with dedicated Karaoke machines, other consumer devices that play CD+G format CDs include the NEC TurboGrafx-CD (a CD-ROM peripheral for the PC Engine/TurboGrafx-16) and Turbo Duo, the Philips CD-i, the Sega Saturn, Mega-CD, the JVC X'Eye, the 3DO Interactive Multiplayer, the Amiga CD32 and Commodore CDTV, and the Atari Jaguar CD (which was an attachment for the Atari Jaguar). Some CD-ROM drives can also read this data. Since 2003, some standalone DVD players have supported the CD+G format.
The CD+G format takes advantage of the subcode channels R through W, which are unused in standard audio CD formats. These six bits store graphics information.
In the CD+G system, 16-color (4-bit) graphics are displayed on a raster field which is 300×216 pixels in size.
See also 
External links