Standard CD

In the past few years CD-ROM technology has transformed the landscape of information conveyance, raising expectations of what we can do and see in the computer environment. Capable of holding 650 megabytes of data, compared with 1.4 megabytes for a high-density 3.5" disc, the CD-ROM has opened the door to an exciting realm of possibilities and is now the standard for cost-effective data and audio storage and distribution. Not only are compact discs a great storage medium for a multitude of uses, it's an excellent data carrier for any application requiring large capacity and high reliability. So, virtually any business can take advantage of CD-ROM technology.

Disc Structure
CD-ROM originated from the audio compact disc, and thus its physical dimensions and characteristics are the same. The main difference between CD-ROM and CD Audio is that CD-Audio contains only audio data, while CD-ROM may contain audio, computer, and video/picture data. The molded plastic compact disc incorporates a continuous spiral of pits, which contain the data. An aluminum reflective layer allows a laser in the compact disc drive to read the encoded information. Data integrity is protected by a lacquer coating on one side and a plastic substrate on the other side. Compact disc information or music is encoded with efficient error detection and correction codes so that drives can correct errors if they occur.

Standardization
All media and drives with the compact disc logo must meet international specifications. This worldwide standardization assures publishers and consumers that a properly manufactured compact disc will function in any CD-ROM drive or audio player, making media portability very easy.

Specifications CD-ROM                                                  

- 650 Megabytes

- 4.75Ó DIA

- Holds 200,000 Pages of Text and Graphics

- 74 Minutes of Audio

- 34 Minutes of Video

- Plays on any CD-ROM Drive

- Windows 95/98, NT, MAC, OS

- Weight: 1.4 Ounces

©PromoDisc Inc. 2005