Invention Grant
US07706224B2 Information recording medium, information reading apparatus and information recording apparatus 失效
信息记录介质,信息读取装置和信息记录装置

Information recording medium, information reading apparatus and information recording apparatus
Abstract:
In an information recording medium, positions of pits are modulated in a direction intersecting a direction of reading of pits, so that a predetermined information is recorded. In this information recording medium, the whole of the predetermined information or a part of the predetermined information is randomized through the used of spread spectrum.
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