(19)
(11)EP 1 191 529 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
11.12.2002 Bulletin 2002/50

(43)Date of publication A2:
27.03.2002 Bulletin 2002/13

(21)Application number: 01307941.3

(22)Date of filing:  18.09.2001
(51)Int. Cl.7G11B 19/12
(84)Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30)Priority: 22.09.2000 JP 2000289348

(71)Applicant: SONY CORPORATION
Tokyo 141 (JP)

(72)Inventor:
  • Ogihara, Koichiro
    Shinagawa-ku, Tokyo 141 (JP)

(74)Representative: Robinson, Nigel Alexander Julian et al
D. Young & Co., 21 New Fetter Lane
London EC4A 1DA
London EC4A 1DA (GB)

  


(54)Optical disk drive, and method for identifying optical disks mounted thereto


(57) An optical disk drive comprising:
  • wobble signal reproduction means for reproducing, in the state where each of mounted optical disks is rotated at a predetermined rotation speed, a signal corresponding to groove wobbles from a predetermined position in a radial direction of the optical disk, plural filter means for extracting each of plural frequency components corresponding to the frequencies of the groove wobbles of the plural kinds of recording-capable optical disks; and
  • disk identification means for identifying a kind of the mounted optical disk, based on the output signals from the plural filter means.