| 摘要 |
The present invention provides an optical disk identification device for use in an optical disk reproduction apparatus for reproducing a plurality of types of optical disks based on information recorded on the optical disks. Recorded information is reproduced from an optical disk 1 while an optical pickup 3 is fixed at a focal position Pf. A focal position detector 32 generates a focal position detection signal Sg that is either at a high level or at a low level at the focal position Pf based on reproduced signals Sa, Sb, Sc, Sd. An RF signal detector 20 detects an RF signal Srf from the reproduced signal based on the focal position detection signal Sg. A recording density identifier 31 , S 14 , S 20 identifies the recording density of the optical disk based on the RF signal. A format identifier S 16 to S 24 identifies the type of the optical disk based on the detected recording density.
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