| 摘要 |
A high-density optical disc such as a high density-digital versatile disc (H D- DVD) or Blu-ray disc, and a method for reproducing or recording data of the high-density optical disc. The high-density optical disc includes a lead-in area, a data area and a lead-out area. The lead-in area has major informatio n. A minimum mark or space length of the major information recorded in the lead - in area is longer than that of data recorded in the data area. The major information of the lead-in area is copied to the lead-out area. On the basis of the data reproduction or recording method, an optical disc device can correctly read and confirm the major information from the high-density optic al disc, minimize the interference between a mark and space in high-density recording data, reduce the effects of scratches or dust on the disc, and efficiently prevent an erroneous data reproduction or recording operation.</ SDOAB>
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