Wednesday, January 16, 2013
Three differences between CDs and DVD box set
Apart from the same shape and size of CDs and DVDs, there are many different things between the two, such as what they hold and how much they can hold. CDs and DVDs store everything, including audio and video, as a series of ones and zeros which means they are digital data storage mediums. Pits and lands (an area where there are no pits) represent ones and zeros. When the disc drive is reading data the laser is reflected off the lands but not off the pits. Microprocessors in the disc drive take the information from the laser and convert it into a digital format that your computer can understand. When you discover how the data storage is implemented on both CDs and DVDs you will understand how the big difference in capacities is achieved. A laser is used to burn pits around a spiral groove in the disc. Lasers have a wave length and the longer the wave length the bigger the pit. DVD lasers have a substantially smaller wave length than a CD laser. A smaller pit obviously takes up less space and ultimately resulting in the ability to store more information in the same amount of surface area. So now you know the difference between CDs and DVDs, if you want to buy DVD box set in bulk, just come to our online store: dvd-usa.com.