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METHOD AND APPARATUS FOR EMBEDDING SECOND CODE INTO OPTICAL DISC DATA BY DATA MODULATION RULE VARIATION
METHOD AND APPARATUS FOR EMBEDDING SECOND CODE INTO OPTICAL DISC DATA BY DATA MODULATION RULE VARIATION
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机译:通过数据调制规则变化将第二代码嵌入到光盘数据中的方法和装置
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摘要
There are provided a method and apparatus for embedding a second level code into a first level code of an optical disc by data modulation rule variation. The apparatus includes a multi-level, varying rule based modulator (199) for modulating the first level code to obtain a channel bit stream representative of the first level code and having the second level code embedded therein. The multi-level, varying rule based modulator modulates the first level code using modulation rules respectively having different statistical properties of pit-land length distributions that preserve a readability of the first level code and that are distinguishable at readout of the optical disc. The different statistical properties represent binary or multilevel data of the second level code.
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