Purple Book is the informal name for Sony and Philips' specification document for the double-density compact disc (DDCD) format. The Purple Book format allows a CD to hold 1.3 Gigabytes by narrowing the track pitch from 1.6 to 1.1 micrometre s, and shortening the minimum pit length from 0.833 to 0.623 micrometres.
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Famous quotes containing the words purple and/or book:
“Ah splendour, my goddess turns:
or was it the sudden heat,
beneath quivering of molten flesh,
of veins, purple as violets?”
—Hilda Doolittle (1886–1961)
“We really learn only from those books that we cannot judge. The author of a book that we were able to judge would have to learn from us.”
—Johann Wolfgang Von Goethe (1749–1832)