DDP - Disc Design Protocol:
 

What is DDP?

A DDP image (disc description protocol) is a set of files that contains the contents of your title (the disc image) plus a set of instructions that tell the encoder on the Laser Beam Recorder how to format your disc. CDman is able to accept your contents in the form of a DDP Image.

Why can't I just copy the contents of my title to your FTP server?

CDman must create a glass master for your title. In order to create this master, we must feed the exact contents of your disc format into the encoder on their Laser Beam Recorder. The encoder can usually read the contents of a CD directly, or it can read a DDP image from a file server or from a tape. If you transfer only the contents of your order, we are forced to copy these contents into a CD recording software package and burn a CD-R or DVD-R check disc. This check disc image may contain the same contents, but there is a chance that the structure of the disc or the format of the disc may be different from your original. CDman does not want to burn a CD to use as your master, due to the time and cost of this procedure, and the liability we face if the content does not match your original. A DDP image ensures that all disc formats and file structures are preserved.

Download White Paper Information on DDP images.

Links to software DDP solutions - CDman is not affiliated with anyone on this list:

http://www.sonicstudio.com/products/pmcd/pmcd01.html

http://www.gearsoftware.com/products/gearpromastering.cfm

http://www.bias-inc.com/products/peakPro5/