What is the difference between a DVD and a CD?
The information given for handling, labelling and cleaning a CD is also applicable to Digital Versatile Discs (DVDs). However the manufacturing and formatting specifications are different: some DVDs have two data layers on one side while others have one layer on one side and another layer on the other side. Other DVDs have two data layers on each side. CDs have one layer on only one side. DVDs have a greater storage capacity than CDs. This capacity allows for better quality recordings. The latest DVD player might be designed to read all pre-existing disc types including CD-R, but a player that was designed before DVD was created cannot play a DVD. While it is possible to design the latest player to play all digital disc types, most machines omit some disc formats. The consumer usually pays extra for each added disc format. When purchasing a player, make sure it can play a wide variety of formats. If you need professional conservation help, please contact the Canadian Association of Pro
In the future, HD DVD and Blue Ray technology will rerevolutionize laser technology. Future High Definition Television programs will be shown in 720p, 1080i or 1080p. These video qualities make watching Television as though it’s photographic quality instead of dithered like current 480i. The capacity for HD DVD is about 35 GB’s per dual layer disc, and Blue Ray is about 45-50 GB’s per disc (unofficial specifications from respective Mfrs.
