Enhanced CD, also known as CD Extra and CD Plus, is a certification mark of the Recording Industry Association of America for various technologies that combine audio and computer data for use in both Compact Disc and CD-ROM players.
The primary data formats for enhanced CDs are mixed mode (Yellow Book/Red Book), CD-i, hidden track, and multisession (Blue Book).
The technology was popular in the late 1990s with the increase of computer usage. Music CDs often included music videos, wallpapers, and other various content. However, more recently, acts wishing to include enhanced content often include a DVD instead, with the advantage of it playing in both a computer's DVD-ROM drive and in a standard DVD player.
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Famous quotes containing the word enhanced:
“It is a relief to read some true book, wherein all are equally dead,—equally alive. I think the best parts of Shakespeare would only be enhanced by the most thrilling and affecting events. I have found it so. And so much the more, as they are not intended for consolation.”
—Henry David Thoreau (1817–1862)