The 50th Anniversary of the Optical Disc
From the “laser disc” to “Blu-ray”
optical disc using a transparent disc technology.
The disc is 30 centimeters in diameter and uses an analog format and
laser technology. It is also called “laser disc” He patented his design
Further development of the optic disc were patented in 1969.
In 1967, the company David Paul Gregg, Gaus Electrophysics, contacted Royal Philips Electronics, but was met with indifference.
The laser disc player sold
only about one million units in the United States and about four
million in Japan and the last LD released in Japan was the “Tokyo
Raiders” in 2001.
One influential contributors to the audio, video and data, is Kees Immink.
Kees A. Schouhamer Immink was born December 18, 1946 in Rotterdam,
Netherlands. He joined Philips Research Laboratories in 1971.
His contribution to the technology of digital audio and video has
allowed all of us listen to audio and watch video on reliable, high
quality media. Dr. Immink coding methods are essential for CD and DVD.
For a complete biography of Kees Immink see:
optical disk video, but they had never heard of.
The Compact Disc format
CD uses a red laser to scan the patterns of bumps on a mirror surface
that are interpreted as bits. These bits can be assembled into bytes. A
CD can hold about 700 megabytes of data or approximately 80 minutes of
It was adopted by the Disc Digital Audio and ratified as IEC 908.
http://www.exp-math.uni-essen.de/ ~ Immink / pdf / cdstory.htm
2. Data storage on CD-ROM
3. Write-once audio and data storage on CD-R
4. Rewritable CD-RW
play movies and video storage “super density” of data.
Two teams set to work to produce a video disc to replace the VHS tape;. The team of Philips and Sony and Toshiba
Philips and Sony began on multimedia CD(MMCD) and Toshiba disk density
super. Reviews focus on each of these “Multi Media” and “Super Density”.
Of course, these two had both video and data capabilities in mind.
Multi Media Compact Disc(MMCD) 1990 Philips and Sony
Super Density Disc(SD) 1990 Toshiba
two competing options, the one offered by Sony / Philips and the other
by Toshiba, it seemed to be on the edge of another format war. It looked
like a repeat of the battle of the formats of the 1980s when the Sony
Betamax was fighting with the “System Home Video” VHS standards, to the
detriment of the consumer. What does the consumer buy? In my opinion the
Betamax was a better option, but the consumer market has decided, and
the victory went to VHS.
But the battle did not prevent take place through the mediation of Lou Gerstner, chairman of IBM, a compromise was reached.
The format of Sony and Philips MMCD has been dropped and the Toshiba SD format was adopted with two additions:
geometry that allows the monitoring of push-pull, a proprietary
technology of Philips and Sony, and EFMplus, created by Kees Immink.
EFMplus encoder is based on a deterministic finite state machine having
four states, which results in words of 8 bits into 16 bits of passwords.
compromise created the DVD format, which has become the standard format
in December 1995 and will continue as such until the majority of people
will no longer be satisfied with “standard video”, but requires Video
high density for all films there. The new Blu-ray format will take over.
DVD uses a red laser to scan the patterns of bumps on a surface mirror,
which are interpreted as bits. These bits can be assembled into bytes
juice on a CD. However, the bumps and the tracks on a DVD are much
smaller and can contain much more information, up to 4.7GB.
Professional Disc for Data(PDD)
the decision in favor of Toshiba's Super Density disc, and the
abandonment of the Multi Media Compact Disc(MMCD) as the main technology
for DVD, Sony decided to design a disc they called Professional Disc
for Data(PDD). The need for higher capacity disk for the next
high-density television systems was a certainty.
Sony introduced the TED in 2003 and became available in 2004. This new
format used the 405nm(Nana meter), BLU-violet laser to read and write to
disk, enabling data storage much more than the red laser used in DVD. The disk capacity was compared to 4.5 GB for a 23GB single-layer DVD.
PDD format has been very short and was abandoned in 2007. Which allowed
the next generation of optical media for the team from Philips / Sony,
Blu-ray technology was developed jointly by Sony and Philips, with a board range.
Apple, Inc. Dell HP Hitachi LG Mitsubishi Electric Panasonic Pioneer Philips Samsung Sharp Sony
Sun Microsystems TDK Thomson Twentieth Century Fox
Walt Disney Warner Bros
Blu-ray uses a 405nm wavelength blue-violet laser and a narrow track pitch of 0.85
The surface layer is 0.1 mm thick, which allows the laser to focus at the opening of 0.85.
disk uses a hard coating polymer called sus, which was developed by TDK
and is supposed to be? extremely resilient and fingerprint resistant.
The Java platform, which is used for menus and multimedia, is mandatory. Blu-ray systems must support JVM.
ROM single layer 25 GB
Rom dual layer 50GB
RW single layer 27 GB
RW Dual Layer 54GB
100GB highest test
theoretical limit of 200 GB
ROM single layer 15 GB
Rom dual layer 30 GB
45GB highest test
60 GB of theoretical limit
Abandoned February 19, 2008
Copyright © Jacob Romeyn