发明名称 |
METHOD OF HIDING AREAS ON A DISC LIKE RECORDING OF THE OPTICALLY REWRITABLE TYPE |
摘要 |
A next generation of high speed CD-RW discs for high speed recording (4x-10x) need a new write strategy, which is not suited for recording at lower speeds (1x-4x). Existing CD-RW recorders may accept these discs and make recordings according to existing write strategies. This will result in unreadable discs. To prevent this, a Power Calibration Area (PCA) and a Program Memory Area (PMA), both needed for recording, are hidden for the existing recorders. As a result the disc will be rejected. In a method wherein an absolute time reference (ATIP) is applied on the disc, the start locations of said areas being determined by a fixed time offset relative to a subsequent Lead-in area, an embodiment of the invention is obtained by making the PCA and PMA untraceable by introducing an Absolute Time in Pre-Groove (ATIP) time code jump of for instance one minute just before the Start time of the Lead-in area. Another embodiment is obtained by introducing the absolute Time in Pre-Groove (ATIP) time code jumps between a Test Area and a Count Area of the program calibration area (PCA).
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申请公布号 |
WO0127922(A1) |
申请公布日期 |
2001.04.19 |
申请号 |
WO2000EP09642 |
申请日期 |
2000.09.29 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
NIJBOER, JAKOB, G.;HEEMSKERK, JACOBUS, P., J. |
分类号 |
G11B20/10;G11B7/0037;G11B7/0045;G11B7/013;G11B19/04;G11B19/12;G11B27/19;G11B27/24;G11B27/30;G11B27/32;G11B27/36;(IPC1-7):G11B19/04 |
主分类号 |
G11B20/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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