发明申请
US20050254409A1 Record carrier including a servo track having first and second modulated parts representing a data type and a word sync type, respectively, and an apparatus for scanning the record carrier
有权
包括具有分别表示数据类型和字同步类型的第一和第二调制部分的伺服记录道的记录载体和用于扫描记录载体的装置
- 专利标题： Record carrier including a servo track having first and second modulated parts representing a data type and a word sync type, respectively, and an apparatus for scanning the record carrier
- 专利标题（中）： 包括具有分别表示数据类型和字同步类型的第一和第二调制部分的伺服记录道的记录载体和用于扫描记录载体的装置
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申请号： US11121752申请日： 2005-05-04
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公开(公告)号： US20050254409A1公开(公告)日： 2005-11-17
- 发明人: Cornelis Schep , Aalbert Stek
- 申请人： Cornelis Schep , Aalbert Stek
- 优先权： EP01203881.6 20011015
- 主分类号： G11B7/00
- IPC分类号： G11B7/00 ; G11B7/007 ; G11B20/10 ; G11B27/19 ; G11B27/30 ; G11B27/32 ; G11B7/24
摘要：
A record carrier has a servo track (4) indicating an information track (9) intended for recording information blocks. The servo track (4) has a periodic variation of a physical parameter at a predetermined frequency and modulated parts for encoding position information at regular intervals. The modulated parts start with a bit sync element and are of a data type having a data bit element, or of a word sync type having a word sync element. The word sync element and the data bit element are modulated according to a same predetermined type of modulation of the periodic variation. The effective strength of a modulated element is the number of periodic variations that are substantially different and available for detection of that element. The effective strength of the word sync element and of the data bit element are equal.
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