公开(公告)号：WO9730439A3

公开(公告)日：1997-09-25

申请号：PCT/IB9700090

申请日：1997-02-07

Applicant: PHILIPS ELECTRONICS NV ,  PHILIPS NORDEN AB

Inventor： VAN DEN ENDEN GIJSBERT JOSEPH ,  SPRUIT JOHANNES HENDRIKUS MARI ,  DUCHATEAU JOHAN PHILIPPE WILLI ,  JAEGERS JOHANNES HUBERTUS GODE

IPC: G11B20/10 ,  G11B7/00 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/30 ,  G11B20/12 ,  G11B20/18 ,  G11B27/00 ,  G11B

CPC classification number: G11B7/006 ,  G11B7/0045 ,  G11B7/00454 ,  G11B20/1217 ,  G11B2020/10898 ,  G11B2020/1277 ,  G11B2020/1288 ,  G11B2220/216 ,  G11B2220/2545

Abstract: The device according to the invention is suitable for recording a rewritable information carrier such as a CD-E covered by a phase-change recording layer. As is known, such an information carrier has a limited useful life because the recorded, optically readable patterns start deviating ever more from the desired form when recorded recurrently. The invention is also based on the recognition that this degradation is accelerated if a certain part of the track on the information carrier constantly accommodates the same patterns, for example, if information blocks are recorded starting from fixed initial positions and the information is represented by the patterns in a specific manner. The device comprises means for shifting the initial position along the track over a distance randomly selected within predefined boundaries and/or for adapting the manner of representation. This causes constantly different patterns to be recorded, even if the same information is to be recorded in a specific part of the track. The information carrier described according to the invention has an additional margin between the information blocks to allow for the shifting of the initial position. 00000

Abstract translation: 根据本发明的装置适用于记录诸如由相变记录层覆盖的CD-E的可重写信息载体。 众所周知，这种信息载体具有有限的使用寿命，因为记录的光可读模式在循序记录时开始偏离期望的形式。 本发明还基于这样的认识：如果信息载体上的轨道的某一部分恒定地容纳相同的模式，则这种劣化是加速的，例如，如果从固定的初始位置开始记录信息块，并且信息由 模式以特定的方式。 该装置包括用于沿着轨道在预定边界内随机选择的距离上移动初始位置和/或用于调整表示方式的装置。 即使在轨道的特定部分记录相同的信息，也会导致持续不断的记录模式。 根据本发明描述的信息载体在信息块之间具有允许初始位置移位的附加余量。 00000

公开(公告)号：WO9828742A3

公开(公告)日：1998-10-01

申请号：PCT/IB9701550

申请日：1997-12-08

Applicant: PHILIPS ELECTRONICS NV ,  PHILIPS NORDEN AB

Inventor： MIMNAGH WINSLOW MICHAEL ,  SPRUIT JOHANNES HENDRIKUS MARI

IPC: G11B20/18 ,  G11B7/00 ,  G11B7/0045 ,  G11B7/125 ,  G11B11/105 ,  G11B19/12

CPC classification number: G11B7/126 ,  G11B7/00454 ,  G11B7/00455 ,  G11B11/10595 ,  G11B19/12 ,  G11B20/182

Abstract: An optical recording method and recording apparatus using this method is described in which an optimum write power of a radiation beam in the apparatus is set by writing a series of test patterns on an optical recordable medium, forming a read signal from the patterns, reading a preset value of the derivative of the modulation of the read signal with respect to the write power from the medium, and processing the read signal together with the preset value to derive an optimum value of the write power.