THE COMPACT DISC WHAT YOU REALLY NEED TO KNOW .
The Compact Disc is undoubtedly the most revolutionary.
medium of recent times. While the latest generation of optical.
media offer many extra benefits such as higher data density,.
faster access times etc. they are really just refinements of the.
basic CD technology.
If you are new to CD technology, a good understanding of the.
basic principles of the Compact Disc is essential and provides a.
firm foundation to allow you understand derivative.
technologies as CD-R, Super-CD and Minidisc.
In addition to an overview of CD technology we place.
particular emphasis on the standard CD tests and their.
implications in terms of disc playability across a broad.
spectrum of applications and hardware.
A HISTORICAL PERSPECTIVE.
The development of the compact disc was due principally to a.
collaboration of two international companies, Philips and.
Sony. Philips had been working on an optical storage medium,.
which initially used analogue methods to Frequency Modulate.
audio components onto the disc for readout by a laser pickup.
These efforts were ambitious and endeavoured to eliminate.
many of the mechanical and electrical shortcomings of vinyl.
and magnetic storage. Unfortunately the original recordings.
were alleged to sound much worse than their traditional.
counterparts. The main reason for this was that even.
microscopic blemishes in the medium could obscure the laser.
pickup from the data causing an entirely new set of.
shortcomings.
In parallel with these developments, Sony Corporation had.
been working on implementing a class of digital error.
correction methods in LSI logic. With such capability available.
microscopic blemishes in the medium could obscure the laser.
pickup from the data causing an entirely new set of.
shortcomings.
In parallel with these developments, Sony Corporation had.
been working on implementing a class of digital error.
correction methods in LSI logic. With such capability available in real time, together with advances in numerical computing.
