Disc Description Protocol
Disc Description Protocol (DDP) is a format for specifying the content of optical disc
Optical disc
In computing and optical disc recording technologies, an optical disc is a flat, usually circular disc which encodes binary data in the form of pits and lands on a special material on one of its flat surfaces...

s, including CDs
Compact Disc
The Compact Disc is an optical disc used to store digital data. It was originally developed to store and playback sound recordings exclusively, but later expanded to encompass data storage , write-once audio and data storage , rewritable media , Video Compact Discs , Super Video Compact Discs ,...

 and DVD
A DVD is an optical disc storage media format, invented and developed by Philips, Sony, Toshiba, and Panasonic in 1995. DVDs offer higher storage capacity than Compact Discs while having the same dimensions....

s. It is commonly used for delivery of disc masters for duplication. The proprietary format is the property of DCA, Inc. The specification is not freely available.

The DDP must contain 4 parts:
  1. Audio image(s) (.DAT file(s))
  2. DDPID (DDP Identifier)
  3. DDPMS (DDP Stream descriptor)
  4. PQDESCR (Subcode descriptor)

An optional text file can also be included, this will contain the track titles and timings.
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