System for recording digital information in a pulse-length modul

Dynamic information storage or retrieval – Storage medium structure – Optical track structure

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369 59, 369 48, 369124, 369116, G11B 700

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054597099

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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