High Speed RW
Technology - Page 1
It is unambiguously acknowledged that CD-ROM technology has moved
from a proprietary Philips/Sony format during its introductory years back into
the early eighties, to a universally accepted "de facto" standard
for distribution of audio and data content. Both its original inventors continue
to play, however, a parental role when new enhancements are being made and "ex-officio"
standards are declared, aiming to "force" compatibility among the
(possibly) diverging ways new innovators might choose to follow trying to extend
the original technology.
Pushing the existing CD-R technology into new heights requires
advances in existing media type formulations, new laser diode innovations, and
faster, lighter and more accurately driven rotors. And all this is finally based
on new designs and implementations of chips able to perform advanced DSP functions,
encoding and decoding of data streams, and head positioning adjustments at a
fraction of the time their predecessors were able to achieve.
The introduction of ReWritable media (CDRW) several years ago
stipulated the dream of ReWritable disks replacing the good old floppy. But
this came at a cost. The formulation of the new media differed drastically from
that of the original plain recorded-once disks. The new media is manufactured
by using materials which alter their laser-beam resistance according to changes
of their crystalline / amorphous phase / state, while the construction of the
former is based in dye technology.
This significant "advancement" made ReWritable disks incompatible
with earlier drives. The newer readers had to be built according to certain
criteria in order to be compatible with the new media. Standards were determined
and at this exactly place the OSTA MultiRead specifications were released and
essentially "enforced" compatibility among all new CD-ROM readers.