Chapter 1. Physical Characteristics of CD and DVD Media

Little has changed in Compact Disc (CD) physics since the origin of CD audio discs in 1980. This is due in part to the desire to maintain physical compatibility with an established base of installed units, and because the structure of CD media was both groundbreaking and nearly ideal for this function.

Digital Versatile Discs (DVDs) are an evolutionary growth of CD’s with slight changes. Considering the development of DVD follows the CD by 14 years, you can see that the CD was truly a revolutionary creation in its time. It is important to understand that both CDs and DVDs are electro optical devices, as opposed to nearly all other compter peripherals which are electromagnetic. There are no ...

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