CD-ROM Input Specification

We prefer CD-R masters for providing your content. The CD-ROM specification is defined in the Yellow Book which is based on the CD audio format but for computer data. The salient parameters are shown below:

 

Parameter Value Comments
Data capacity 682 MB 74:30 min:sec
Raw data bit rate 1.41Mb/s all bytes
User data rate 150 kB/s at normal speed
Block (sector) size 2352 bytes  
User data per sector 2048 bytes full error correction  
Sector rate 75 sect/s at normal speed
Sector Modes 1 or 2  
Sector Forms 1 or 2 only with Mode 2


You must use "Disk at Once Mode" when burning your data onto CD-R. Do not attempt to send us masters using "Track Incremental" or "burn session". Hewlett Packard and Sony burners are notorious for defaulting to this mode so be aware! Check with your software / hardware operational manuals for details. Disc at once mode finalizes the disc and prevents further additional data recording.