A history on CD players

A history

The compact disc was developed in 1979 by Philips and Sony. Philips developed the general manufacturing process, based on their earlier Laserdisc technology, while Sony contributed the error-correction method.

Early compact disc prototypes produced by Philips were 115mm in diameter, with a 14 bit resolution and a 60 minute capacity. Sony insisted on a 16 bit resolution and 74 minute capacity, which increased the size of the disc to 120mm. The reason for the increase in capacity is rumored to be to hold even the slowest versions of Beethoven's 9th Symphony.

Compact discs were first mass produced in 1982, in Langenhagen near Hanover, Germany

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