发明名称 |
Recorded information evaluation method and device and information recording medium therefor |
摘要 |
<p>From an optical disc on which physical address information is recorded in the form of phase modulation of a groove wobble, a wobble signal is optically obtained which is affected by the groove wobble. The wobble signal is phase detected by a phase detector (32) and then fed into a low-pass filter (34). In a jitter calculator (51) the value of σ/T is calculated from the standard deviation σ of a jitter distribution obtained from the output of the low-pass filter and the period (T) of a symbol clock for the phase modulation to evaluate the recorded physical address information.
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申请公布号 |
EP1463041(A3) |
申请公布日期 |
2006.02.15 |
申请号 |
EP20040003395 |
申请日期 |
2004.02.16 |
申请人 |
KABUSHIKI KAISHA TOSHIBA |
发明人 |
NAGAI, YUJIA;OGAWA, AKIHITOA;NODA, CHOSAKUA |
分类号 |
G11B7/005;G11B7/007;G11B7/004;G11B20/10;G11B20/14;G11B27/19;G11B27/24;G11B27/36 |
主分类号 |
G11B7/005 |
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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