5312010 33 CIS 3003 Fundamentals of Information Technology 97 Optical Storage

5312010 33 cis 3003 fundamentals of information

This preview shows page 33 - 36 out of 36 pages.

5/31/2010 33 CIS 3003 Fundamentals of Information Technology 97 Optical Storage (continued) Bits on a CD-ROM are recorded by physically creating tiny protrusions, also called lands , on the CD’s clear plastic surface during the manufacturing phase 97 Areas without lands remain shallow; these areas are called pits Information Technology in Theory CIS 3003 Fundamentals of Information Technology 98 Optical Storage (continued) 98 Information Technology in Theory CIS 3003 Fundamentals of Information Technology 99 Optical Storage (continued) CDs can record many types of information For a device to properly read and save the information stored on a CD, the device must use standard formats For example, music on an audio CD is recorded following the Red Book standard developed by Philips 99 following the Red Book standard developed by Philips and Sony DVDs rely on the same principles as CD technology DVDs can store much more data than CDs, primarily because the size of lands and pits can be diminished and spaced in closer proximity, and because more than one spiral track may be used to store data due to multiple layers Information Technology in Theory
Image of page 33