System for recording digital information in a pulse-length modulation format
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United States of America Patent
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Jun 14, 1994
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app pub date -
Jun 11, 1993
filing date -
Jul 16, 1980
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Abstract
An improved system for recording and playing back digital information in a special pulse-length modulation format on a disc-shaped record. The digital information is stored in a succession of alternating marks and spaces, both having lengths that are discretely variable in accordance with a succession of multi-bit binary code blocks.
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