Optical recording medium having a specified range of pit widths and pit depths
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United States of America Patent
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-
Nov 17, 1998
Grant Date -
N/A
app pub date -
May 5, 1997
filing date -
May 20, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Even if grooves are, in order to improve productivity, omitted from an optical recording medium having pits indicating information signals formed in at least a portion of recording tracks of the optical recording medium, signals having satisfactorily high levels required to perform tracking control are attempted to be obtained. The number of regions of the recording tracks in which the pits are formed is made to be larger than the number of regions in which no pit is formed. Specifically, since '0' has higher appearance probability than '1' in a case of a binary information signal consisting of '0' and '1', pits are formed at positions corresponding to '0' of the information signal.
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