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AssigneeSony Corporation
InventorsSeiji Kobayashi, Hiroshige Okamura, Hisayuki Yamatsu
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In an information recording medium from which information recorded on each pit is reproduced by an optical detection system that obtains a reproduced signal corresponding to each pit by scanning the information recording medium along pit rows by a light beam, data of high recording density can be accurately reproduced by a simple arrangement by shifting in a step-wise fashion edge positions of an information pit from a predetermined reference position in response to digital information to be recorded within a range corresponding to a predetermined shift period smaller than a transition period of a reproduced signal determined in response to a transfer characteristic of the optical detection system. Therefore, a nonlinear intersymbol interference can be reduced without emphasizing a noise component.
An information recording apparatus of the type which includes recording means for recording digital information on an information recording medium from which recorded information is reproduced by an optical detection system which scans said information recording medium along pit rows by a light beam, wherein the improvement comprises that the recording means records each information pit so that edge positions of each information pit are shifted in a step-wise fashion from a predetermined reference position in response to digital information to be recorded, wherein said digital information is recorded as shift amounts of multiple stages of said edge positions, wherein said recording means records on said information recording medium an education pit, inserted into a pit row, whose edge positions are shifted in a step-wise fashion from said predetermined reference position in response to education data and which is predetermined in response to an insertion position.
An information recording process of the type wherein digital information is recorded as pits on an information recording medium which can be reproduced by an optical detection system which obtains a reproduced signal corresponding to each information pit by scanning the information recording medium along pit rows, wherein the improvement comprises the steps of:
An information recording process of the type wherein digital information is recorded as pits on an information recording medium which can be reproduced by an optical detection system which obtains a reproduced signal corresponding to each information pit by scanning the information recording medium along pit rows, wherein the improvement comprises the steps of:
An information recording process of the type wherein digital information is recorded as pits on an information recording medium which can be reproduced by an optical detection system which obtains a reproduced signal corresponding to each information pit by scanning the information recording medium along pit rows, wherein the improvement comprises the steps of:
An information recording process of the type wherein digital information is recorded as pits on an information recording medium which can be reproduced by an optical detection system which obtains a reproduced signal corresponding to each information pit by scanning the information recording medium along pit rows, wherein the improvement comprises the steps of:
Dependencies are inferred from the claim text.