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CD Replication: Other Formats 2

The following text is an edited extract from original article at http://en.wikipedia.org/wiki/Compact_Disc

CD-Text

CD-Text is an extension of the Red Book specification for audio CD that allows for storage of additional text information (e.g., album name, song name, artist) on a standards-compliant audio CD. The information is stored either in the lead-in area of the CD, where there is roughly five kilobytes of space available, or in the subcode channels R to W on the disc, which can store about 31 megabytes.

CD + Graphics

Compact Disc + Graphics (CD+G) is a special audio compact disc that contains graphics data in addition to the audio data on the disc. The disc can be played on a regular audio CD player, but when played on a special CD+G player, can output a graphics signal (typically, the CD+G player is hooked up to a television set or a computer monitor); these graphics are almost exclusively used to display lyrics on a television set for karaoke performers to sing along with.

CD + Extended Graphics

Compact Disc + Extended Graphics (CD+EG, also known as CD+XG) is an improved variant of the Compact Disc + Graphics (CD+G) format. Like CD+G, CD+EG utilizes basic CD-ROM features to display text and video information in addition to the music being played. This extra data is stored in subcode channels R-W. Very few, if any, CD+EG discs have been published.

Super Audio CD

Super Audio CD (SACD) is a read-only optical audio disc format aimed at providing much higher fidelity digital audio reproduction than the Red Book audio CD. Introduced in 1999, it was developed by Sony and Philips Electronics, the same companies that created the Red Book audio CD. SACD was in a format war with DVD-Audio, but neither has yet managed to replace audio CDs. SACD has the advantage over DVD-Audio in that most SACD discs are hybrids: they also contain a standard audio CD layer which is playable in existing CD players.

CD-MIDI

Compact Disc MIDI or CD-MIDI is a type of audio CD where sound is recorded in MIDI format, rather than the PCM format of Red Book audio CD. This provides much greater capacity in terms of playback duration, but MIDI playback is typically less realistic than PCM playback.