CD-BRIDGE
A special type of CD-ROM XA disc, CD-Bridge discs have information that
allows them to be played on CD-I players.
For example Photo CD discs are CD-Bridge type.
This kind of disc is basically an audio disc with graphics placed in the subcode channels for playback on CD-I, Sega's SEGA CD, CDTV, and Karaoke players.
The
CD-I (Compact Disc-Interactive) data format is identical to that used
for CD-ROM XA. i.e. Mode 2 forms 1 and 2, but is run on a dedicated CD-1
system.
Both CD-I and CD-ROM XA standards enable interleaving of audio and data
to provide a seamless presentation of the two. The video on CD-I is ISO
MPEG 1 standard, which provides full motion video similar to VHS quality.
CD-I Ready discs are audio discs with CD-I data stored in the pause before track 1. The CD-I features of CD-I Ready discs can only be accessed by CD-I players.
CD Karaoke discs are CD-Bridge type discs. These discs contain text, audio and video data.
The CD-ROM XA (Extended Architecture) standard is a hybrid of CD-ROM and CD-I (CD Interactive - see below). It has the same features as CD-I (video + audio) but can only be run on a computer equipped with the appropriate hardware/software. The data is recorded in Mode 2 forms 1 and 2.
Photo
CD was developed by Kodak and Philips in 1990. Photographs are stored
digitally on a disc, and can be displayed by PhotoCD players, CD-l players,
and computers with PhotoCD- compatible CD-ROM drives. The data format
is Mode 2 form 1. One version, Portfolio CD, also includes audio and generic
retrieval software in a complete package. In 1994, the company passed
a rigorous certification exam from Kodak, enabling us to carry out PhotoCD
work to Kodak's specifications.
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