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公开(公告)号：EP0512860A2
公开(公告)日：1992-11-11
申请号：EP92304171.9
申请日：1992-05-08
CPC分类号： G11B7/08505 , G11B21/085 , G11B27/105 , G11B27/32
摘要： A double-sided optical disc player operable with a double-sided optical disc (1), which comprises:
first and second optical heads (4A, 4B) for irradiating laser beams to tracks on opposite sides (3A, 3B) of the double-sided optical disc (1);
first and second servo means (6A, 6B) for focusing and tracking the laser beams towards predetermined tracks on the opposite sides of the optical disc;
at least one retrieval means for sending the first and second optical heads towards the predetermined tracks;
first and second ID read-out means (10A, 10B) for reading out respective sector addresses from associated sector identifiers (ID) on the respective opposite sides of the optical disc;
a first sector recording and/or production control means (11A) for detecting a target sector when an sector address output from the first ID read-out means (10A) coincides with the target sector on one of the sides of the optical disc and for activating a recording or reproduction of information;
a second sector recording and/or reproduction control means (11B) for detecting a target sector on the other of the sides of the optical disc and for activating a recording or reproduction of the information; and, an information recording and/or reproducing means (12A, 12B) for recording or reproducing information on or from the target sectors on the respective sides of the optical disc by means of the first and second sector recording and/or reproduction control means. The disc player also includes an ID offset detecting means (21) for calculating, in response to outputs from the ID read-out means, an ID offset value (17) descriptive of an annular displacement in sector position between the opposite sides (3A, 3B) of the optical disc traced by the associated optical heads (4A, 4B); an ID offset retaining means (17) for retaining the ID offset value (18);
an adder means for adding the ID offset value to an output from the second ID read-out means; and the second sector recording and/or reproduction control means (11B) detecting a target sector when a corrected sector address output from the adder means coincides with the target sector on the other of the sides of the optical disc.摘要翻译： 一种双面光盘播放器，其可操作于双面光盘（1），其包括：用于将激光束照射到双面光盘的相对侧（3A，3B）上的轨道的第一和第二光学头（4A，4B） 双面光盘（1）; 第一和第二伺服装置（6A，6B），用于将激光束朝向在光盘的相对侧上的预定轨道聚焦和跟踪; 至少一个检索装置，用于将第一和第二光学头朝向预定轨道发送; 第一和第二ID读出装置（10A，10B），用于从光盘的相应相对侧上的相关扇区标识符（ID）读出相应的扇区地址; 第一扇区记录和/或生产控制装置（11A），用于当从第一ID读出装置（10A）输出的扇区地址与光盘的一侧上的目标扇区重合时，用于检测目标扇区，并且 激活信息的记录或再现; 第二扇区记录和/或再现控制装置（11B），用于检测光盘另一侧的目标扇区并激活信息的记录或再现; 以及用于借助于第一和第二扇区记录和/或再现控制装置在光盘的各个侧面上的目标扇区上记录或再现信息的信息记录和/或再现装置（12A，12B）。 光盘播放器还包括ID偏移检测装置（21），用于响应于来自ID读出装置的输出，计算描述在相对侧（3A，3A）之间的扇区位置的环形位移的ID偏移值（17） 由相关联的光学头（4A，4B）跟踪的光盘的图3B）; 用于保持ID偏移值（18）的ID偏移保持装置（17）; 加法器装置，用于将ID偏移值与来自第二ID读出装置的输出相加; 并且当从加法器装置输出的校正扇区地址与光盘的另一侧上的目标扇区一致时，第二扇区记录和/或再现控制装置（11B）检测目标扇区。
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公开(公告)号：EP0512860B1
公开(公告)日：1996-07-17
申请号：EP92304171.9
申请日：1992-05-08
CPC分类号： G11B7/08505 , G11B21/085 , G11B27/105 , G11B27/32
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公开(公告)号：EP0512860A3
公开(公告)日：1993-06-23
申请号：EP92304171.9
申请日：1992-05-08
CPC分类号： G11B7/08505 , G11B21/085 , G11B27/105 , G11B27/32
摘要： A double-sided optical disc player operable with a double-sided optical disc (1), which comprises:
first and second optical heads (4A, 4B) for irradiating laser beams to tracks on opposite sides (3A, 3B) of the double-sided optical disc (1);
first and second servo means (6A, 6B) for focusing and tracking the laser beams towards predetermined tracks on the opposite sides of the optical disc;
at least one retrieval means for sending the first and second optical heads towards the predetermined tracks;
first and second ID read-out means (10A, 10B) for reading out respective sector addresses from associated sector identifiers (ID) on the respective opposite sides of the optical disc;
a first sector recording and/or production control means (11A) for detecting a target sector when an sector address output from the first ID read-out means (10A) coincides with the target sector on one of the sides of the optical disc and for activating a recording or reproduction of information;
a second sector recording and/or reproduction control means (11B) for detecting a target sector on the other of the sides of the optical disc and for activating a recording or reproduction of the information; and, an information recording and/or reproducing means (12A, 12B) for recording or reproducing information on or from the target sectors on the respective sides of the optical disc by means of the first and second sector recording and/or reproduction control means. The disc player also includes an ID offset detecting means (21) for calculating, in response to outputs from the ID read-out means, an ID offset value (17) descriptive of an annular displacement in sector position between the opposite sides (3A, 3B) of the optical disc traced by the associated optical heads (4A, 4B); an ID offset retaining means (17) for retaining the ID offset value (18);
an adder means for adding the ID offset value to an output from the second ID read-out means; and the second sector recording and/or reproduction control means (11B) detecting a target sector when a corrected sector address output from the adder means coincides with the target sector on the other of the sides of the optical disc.
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