CD-i Ready

CD-i Ready is a compact disc format for mixing audio and data content on a CD. It was developed by Phillips in 1991, based on the CD-i format.

The CD-i Ready format uses a particular technique to get audio CD players to skip over the CD-i software and data. CD-i Ready places the software and data in the pregap of track 1 (index 0).[1] Since most CD players assume that the pregap area contains only silence, they skip it. Because of this, CD-i Ready was presented as an alternative to CD-i (which stores data in the regular indexes of the first tracks of a disc), which was more compatible with audio CD players.

The term "enhanced CD" is sometimes used to refer to different CD formats that support a mix of audio and data content. Apart from CD-i Ready and CD-i, these formats include mixed mode CDs and the Enhanced Music CD format.

The CD-i Bridge format is similar bridge format in that it is compatible with two specifications, in this case CD-i and CD-ROM.


  1. Application Note 'CD-i Ready' disc, Philips Interactive Media Systems - October 1991 Technical specification of the 'CD-i Ready' type disc. CD-i Ready is an Audio-CD with CD-i data located in the pre-gap before track 1. Contains info for producers of CD-i players and creators of CD-i titles.
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