发明名称 |
Recorded information evaluation method and device and information recording medium therefor |
摘要 |
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 Ã/T is calculated from the standard deviation à 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.
|
申请公布号 |
EP1463041(A2) |
申请公布日期 |
2004.09.29 |
申请号 |
EP20040003395 |
申请日期 |
2004.02.16 |
申请人 |
KABUSHIKI KAISHA TOSHIBA |
发明人 |
NAGAI, YUJI;OGAWA, AKIHITO;NODA, CHOSAKU |
分类号 |
G11B7/005;G11B7/007;G11B7/004;G11B20/10;G11B20/14;G11B27/19;G11B27/24;G11B27/36;(IPC1-7):G11B7/007 |
主分类号 |
G11B7/005 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|