发明名称 |
Digital information reproduction method |
摘要 |
An optical disc 100 using super-resolution effects that achieves higher-density recording exceeding the optical resolution suffers from the signal-quality degradation caused by the normal resolution component included in the reproduction signal 51. To address this problem, a data reproduction method is provided. In the method, characteristic error patterns are identified and parity check codes in conformity with run-length limited coding are used to carry out efficient and reliable error correction. Error patterns caused by the normal resolution crosstalk are localized in the leading edges of a mark following a long space and in the trailing edges of a long mark. Whether an error exists in the data is determined by use of the parity check codes. When an error occurs, a pattern in which an error is most likely to occur is selected from the above-mentioned patterns by taking account of the edge shift direction, and then the error therein is corrected. |
申请公布号 |
EP2051255(A2) |
申请公布日期 |
2009.04.22 |
申请号 |
EP20080016154 |
申请日期 |
2008.09.12 |
申请人 |
HITACHI LTD. |
发明人 |
MINEMURA, HIROYUKI;SHINTANI, TOSHIMICHI;ANZAI, YUMIKO;ETO, SOICHIRO |
分类号 |
G11B20/14;G11B20/10;G11B20/18;H03M5/14 |
主分类号 |
G11B20/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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