发明名称 |
Apparatus and method for reading address information from an optical disk |
摘要 |
An apparatus for reading address information using an optical head from an optical disk medium which comprise a track groove thereon and on which information is recorded along the track groove on a block unit basis, the block unit having a predetermined length, wherein the block unit includes a number of sub-blocks that are arranged along the groove, wherein a part of the track groove has a wobble shape that is defined by a combination of a steep displacement pattern and a smooth displacement pattern to represent address information of the block unit, the apparatus comprising: a differential operating circuit for obtaining a wobble signal corresponding to the wobble shape; and a signal processor for measuring a phase polarity of a second harmonic of a fundamental wobble frequency of the wobble signal and for judging the measured phase polarity as information 0 or 1 for each sub-block; and a corresponding method and signal processing device
|
申请公布号 |
EP1686587(A2) |
申请公布日期 |
2006.08.02 |
申请号 |
EP20060008834 |
申请日期 |
2002.06.20 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
ISHIBASHI, HIROMICHI;FURUMIYA, SHIGERU;NAKAMURA, ATSUSHI;MINAMINO, JUNICHI;ISHIDA, TAKASHI |
分类号 |
G11B27/19;G11B7/005;G11B7/007;G11B20/10;G11B20/12;G11B27/24;G11B27/30 |
主分类号 |
G11B27/19 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|