Who invented the DVD and CD?

Question

Just wondering.

Answer 1

In the early 1970s, using video Laserdisc technology, Philips' researchers started experiments with "audio-only" optical discs, initially with wideband frequency modulation FM and later with digitized PCM audio signals. The compact disc was thus developed by Philips from its own 12 inch Philips LaserVision discs. At the end of the 1970s, Philips, Sony, and other companies presented prototypes of digital audio discs.

In 1979 Philips and Sony decided to join forces, setting up a joint task force of engineers whose mission was to design the new digital audio disc. Prominent members of the task force were Kees Immink and Toshitada Doi. After a year of experimentation and discussion, the taskforce produced the "Red Book", the Compact Disc standard. Philips contributed the general manufacturing process, based on the video LaserDisc technology. Philips also contributed the Eight-to-Fourteen Modulation, EFM, which offers both a long playing time and a high resilience against disc handling damage such as scratches and fingerprints; while Sony contributed the error-correction method, CIRC. The Compact Disc Story, told by a former member of the taskforce, gives background information on the many technical decisions made, including the choice of the sampling frequency, playing time, and disc diameter. According to Philips, the Compact Disc was thus "invented collectively by a large group of people working as a team. The Compact Disc reached the market in late 1982 in Asia and early the following year in other markets. On August 17 of that year PolyGram produced the world's first mass-produced audio CD containing classical music: Claudio Arrau's rendition on the piano of various waltzes by Frederic Chopin. The first pop music CD by the same producer was ABBA's album The Visitors. [1] This event is often seen as the "Big Bang" of the digital audio revolution. The new audio disc was enthusiastically received, especially in the early-adopting classical music and audiophile communities and its handling quality received particular praise. The far larger popular and rock music industries were slower to adopt the new format, especially in the huge consumer markets in Europe and the United States.

Answer 2

The first commercial Cd's were invented by Columbia/Nippon/Denon
and later licensed to Philips. They still, to this day, carry the trade mark : compack (over the larger word) Disk, under which is digital audio. The first video large disks were invented by RCA and later licensed to Philips. I still have 2 of the original Denon OEM test discs that on track 10 and 11 (they are 99 track disks)
have the story of the history of the process, track 10 is in Japanese and track 11 in English.

Answer 3

Philips invented the CD audio technology. Sony and Philips later joined forces to master the technology..
http://en.wikipedia.org/wiki/Compact_disc

http://en.wikipedia.org/wiki/Dvd

Answer 4

Sony

Answer 5

It was actualy Phillips who invented it and sold their patent to Sony.

Answer 6

AL GORE OF COURSE