发明名称 |
Evaluation value calculating apparatus, recording and playback apparatus, evaluation value calculating method, recording method |
摘要 |
An evaluation value calculating apparatus includes the following elements. A difference metric selecting unit selects a difference metric for a specific recorded sequence in recorded sequences obtained in a maximum likelihood decoding process when information expressed with marks and spaces on a recording medium is played back, the difference metric being obtained in the maximum likelihood decoding process. A difference metric error value calculating unit determines a difference metric error value for the selected difference metric using a calculation method that is selected according to an edge shift direction of each of the marks on a time axis, the difference metric error value representing an error from an ideal difference metric and the edge shift direction on the time axis. A statistical processing unit performs statistical processing on the determined difference metric error value on the basis of each of states of path meeting points to generate an evaluation value.
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申请公布号 |
US2007109939(A1) |
申请公布日期 |
2007.05.17 |
申请号 |
US20060592482 |
申请日期 |
2006.11.03 |
申请人 |
SHIMIZU TOSHIKI;KURA JUMPEI;FUKUYAMA MARIKO |
发明人 |
SHIMIZU TOSHIKI;KURA JUMPEI;FUKUYAMA MARIKO |
分类号 |
G11B20/10 |
主分类号 |
G11B20/10 |
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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