DVD and CD Publisher

Your CD burner has a moving laser assembly. This is just the same as in an ordinary CD player. Not only does your CD burner have a standard read leaser, but it also has a write laser. This laser is much more powerful than the read leaser. It can alter the surface of the CD. A write laser moves in the same ways as the read lasers do, by moving outward while the disc is spinning. On the bottom of the CD, a layer of grooves is pressed in to it. This guides the laser in the correct groove path. Through calibration of the rate of spin along with the movements of the laser assembly, your burner keeps this laser running along the each track consistently.

The Recording Process

In order to record, your burn will turn the laser writer on and off in synchronicity with the patterns of 0s and 1s. In order to encode a 0, the laser has to darken the material. In order to encode a 1, it leaves it translucent. Most of your CD burners today can produce CDs at varying speeds. These can be 1x, 2x, 4x or higher. When you record at 1x speed, your CD will spin at around the same rate as it would in a CD player that is reading your CD. It would take about 60 minutes to record approximately 60 minutes of music of video. At 2x speeds, it would take you about 30 minutes to record 60 minutes. If you want to record CDs in less time, then you need faster speeds, which will require more advanced laser control systems.

There are two types of blank discs. One is a CD-R, that can only be used to record data on it once. The other is a CD-RW, that can be erased over and over again to store new data on it.

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