The duplication of compact discs contains two phases. Firstly it is the preparation of the date or information to go onto the discs and secondly, writing that particular information on the discs. While in the first phase the data is arranged into something called optical disc image. This creates the image that will help in holding the information which will be transferred onto the CDs. In order to create this image all the information is arranged in a single file and then it is formatted to suit the reading on the discs. This not only helps the reader to understand the information contained on the disc but also the location of the information on the disc that’s travels into the different parts of the data such as a particular music track.
Once the information is collected and and the disc is ready for duplication, it is then laid out on the CD with a start point, or a lead to inform the CD reader exactly where the information starts with the CD. A table of content is also there to explain what and where the information isand the lead out point indicates where the data has finished. Most of the software for duplication of CDs use the compact disc file system or the standard file system. The reason for this standardization is to make the CDs work in all readers and music system. There are also different modes within this file system such as CD-ROM mode 1 or CD-ROM mode 2.
In order to write data on the optical disc during the CD duplication, lasers are used in most of the cases. The lasers need to be standardized to the right strength and this depends on the type of disc being used. For instance, re-write discs posses metal alloy that is melted to produce reflection variation while read-only uses an organic dye for the reflection variation. This dye is generally used on the surface of the discs. Read-only discs have a good reflection variation and are of better quality, while the re-write discs do not posses a great reflection variation and are of lower quality. But due to its rewritable properties it has greater flexibility in terms of its usage.As the contrasts in reflectivity is different, therefore different laser calibration is required to both read and write each type of discs.
Both these types of duplication are in use today. These are generally standardized with external drives using the PATA dive connection as well as with an internal drive using the parallel ATA connection. Laser technology is considered as the key component of the CD duplication technique and this technology will be developed further. As huge amount of information is required to fit into a single discs therefore the wavelength of the lasers is adjusted accordingly.
The majority of the people thinks that CD replication is as same as CD duplication. However, both are not the same. Duplication is the burning of a CD while CD replication entails several challenging devices that stamp discs in bulk. It is basically for those people who require several duplicates of a compact disc that generally troubles with replication of compact discs.
Author Bio
Mia Jones is a technology geek, a gadget expert and a web analyst. She is associated with software development, software testing tool design and QC (Quality Check). Mia also writes for technology sites on a part-time basis. In her latest articles on dvd duplication she shares some interesting ideas and helpful resources. Mia suggests her readers to consult Nationwide Disc for disk duplication related information.
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