Question

who is invent CD who is the inventor and which year

Answer 1

As to my best knowledge, there is no person existing presently, named invent CD. The 'the' inventor you're asking about is context-less.

Answer 2

The first workable digital compact disc device, the precursor on now ubiquitous CD/DVDs, was invented in the late 1960s by the American physicist James Russell.

James T. Russell was born in Bremerton, Washington in 1931. He was always a smart boy and at the age of six he devised a remote-control battleship with a storage compartment for his lunch (obviously the young James enjoyed the food :-)

In 1953, Russell earned his Bachelor degree in physics and graduated from Reed College in Portland. Afterwards he went to work as a Physicist in General Electric's nearby labs in Richland, where his wife Barbara worked as a chemist. At GE, working for the Hanford Nuclear Plant, and appointed as a "designated problem-solver" for GE experimental unit, Russell initiated many experimental instrumentation projects. He was among the first to use a color TV screen and keyboard as the main interface between computer and operator. He also designed and built the first electron beam welder.

In 1950s and early 1960s, Russell, who was an avid music listener (he was found of classical music—Beethoven, Chopin, Mussorgsky, Offenbach. etc.), quite frustrated with the wear and tear of his vinyl records and their poor sound quality, tried to improve the record player. Initially he tried using a cactus needle, instead of steel one, for a stylus, but with no success. "After each record you had to resharpen the needle," he recalled.

Alone at home on a Saturday afternoon, he suddenly realized that the wear and tear on the records due to the contact from the stylus to the record, can be avoided by using a light to read the music without physically touching the disk. Moreover, as he was familiar with digital data (in punch card or magnetic tape form), he could accomplish this task in a digital way, more efficiently and effective. He realized, that if he could make the binary code compact enough, he could store not only symphonies, but entire encyclopedias on a small piece of film. "I realized that if I wanted to store music, there weren't enough bits on the conventional digital tape around at the time," he said. "So I came up with the optical process."

In 1965, the Ohio-based Battelle Memorial Institute opened its Pacific Northwest Laboratory in Richland, to took over management of Hanford's lab, and James Russell joined the effort as Senior Scientist. Thus he gained an audience for his more far-fetched ideas and immediately began to pepper Battelle with proposals for new commercial concepts. The optical digital technology was initially met with skepticism, as it was not believed that one could digitize sound. "Here I was at Battelle, enmeshed in the scientific community, and one of the first things I had to demonstrate was that you could digitize music and reproduce it" he said. "Music into numbers? Come on now, Russell."


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