| 摘要 |
An automatic disk discriminating method and apparatus in an optical disk system. A specific period value (that is, a specific frequency) of the information signal reproduced from a disk is compared with a predetermined reference value. If a higher frequency than the predetermined reference value is detected, the disk is determined to be a DVD. If a lower frequency than the predetermined reference value is detected, the disk is determined to be a CD. The disk discriminating method and apparatus are less affected by noise, thereby improving the accuracy in determining the disk type.
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