Codes For Optical Recording

Jordan Isailovic

doi:10.1117/12.946448

12 April 1985 Codes For Optical Recording

Jordan Isailovic

Proceedings Volume 0529, Optical Mass Data Storage I; (1985) https://doi.org/10.1117/12.946448
Event: 1985 Los Angeles Technical Symposium, 1985, Los Angeles, United States

Abstract

Optical recording systems capable of information storage and retrieval, using a highly focused laser beam as the recording and playback source, have been developed to a point where products are introduced. Many varities of archival write once, or nonalterable, optical storage media have been proposed and developed. Reversible or erasable optical storage media have been the subject of research since the earliest days of optical recording. Many different wave shapes for encoding digital information are being used, each with its own application and limitations. If clock and data are derived from the read waveform, transitions must occur frequently enough to provide synchronization pulses for the clock. On the other hand, consecutive transitions must be far enough apart to limit the interference to an acceptable level for reliable detection. Due to this, the binary data is coded in binary sequences that correspond to waveforms in which the maximum and minimum distances between consecutive transitions are constrained by prescribed coding rules. In this paper the algorithms and properties of the major recording codes for optical recording are discussed. This can be used in connection with channel parameters to define the best encoding scheme for the particular case.

Citation Download Citation

Jordan Isailovic "Codes For Optical Recording", Proc. SPIE 0529, Optical Mass Data Storage I, (12 April 1985); https://doi.org/10.1117/12.946448

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