Posts Tagged: ‘cd’

You Asked: Why is there a need to convert analog signals to digital? — Ankit, Gwalior, India Marshall Brain Answers: One reason is to avoid degradation and corruption of the signal. This is one reason why CDs (which are digital) are preferred over vinyl records (which are analog). On a vinyl record, the pressure of [...]

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As an audiophile, James Russell loved his record collection despite the scratching and warping of vinyl. As an inventor, he knew there had to be a better way to play music. Learn more about his Stuff of Genius in this episode.

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I’d like to take a moment to wish our good friend the compact disc a happy birthday. Sadly, its birthday was actually the 8th, but I sent it some flowers, so hopefully it will forgive me.
Last Friday, the IEEE (once an acronym for the Institute of Electrical and Electronics Engineers, Inc., but now it’s just IEEE) granted Royal Philips Electronics an IEEE Milestone Award for contributing to the creation of the CD. Yesterday was the 30th anniversary of the first demonstration of the CD prototype, which was codenamed “Pinkeltje.” Frankly, I’m glad they ditched that name in favor of “compact disc.”
Since Sony and Philips launched CD players in 1982, more than 3.5 billion CD audio players have been sold, as well as another 3 billion CD-ROM drives and 240 billion compact discs themselves.

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Data rot is what happens if you save your work on a particular machine, then later on you find you still have the file — but no machine that can read the data any longer. Or perhaps the file is a digital file format created in software that no longer works on your computer, and no one else’s software can read the file. Data rot can also happen if you have a magnetic storage medium that decays, like tape. In that case, the tape can literally disintegrate as the play head comes into contact with it.
There was a piece on CBS News Sunday Morning, in which David Pogue, The New York Times’ personal technology columnist, led viewers on a trip to the Computer History Museum. There, they saw the first hard drive — which weighed 1,000 pounds (453.6 kilograms). And it held 5 MB!

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