US 7,555,205 B2
Method for controlling defect of optical disk, optical disk recording device, and optical disk reproducing device
Masaru Yamaoka, Kadoma (Japan); Takashi Yumiba, Kyotanabe (Japan); and Takahiro Nagai, Osaka (Japan)
Assigned to Panasonic Corporation, Osaka (Japan)
Appl. No. 10/494,614
PCT Filed Oct. 31, 2002, PCT No. PCT/JP02/11331
§ 371(c)(1), (2), (4) Date May 04, 2004,
PCT Pub. No. WO03/041074, PCT Pub. Date May 15, 2003.
Claims priority of application No. 2001-341687 (JP), filed on Nov. 07, 2001.
Prior Publication US 2004/0258400 A1, Dec. 23, 2004
Int. Cl. H04N 5/00 (2006.01)
U.S. Cl. 386—126  [386/95; 386/113; 386/125] 23 Claims
OG exemplary drawing
 
13. An optical disc recording apparatus for recording, on an optical disc, main information by forming optically-readable recording marks and recording sub information by superimposing the sub information on the main information, the optical disc recording apparatus comprising:
a recording unit operable to record the main information in a recording area of the optical disc by forming the recording marks on the optical disc, and record the sub information by superimposing the sub information on the main information, the sub information being recorded using phase modulation to displace edge positions of the recording marks;
a verification unit operable to judge whether or not the main information and the sub information have been recorded normally, every time a predetermined amount of main information and sub information are recorded, and when it is judged that at least one of the main information and the sub information has not been recorded normally, regarding the recording area as a defective area related to a recording of one of (i) the main information, (ii) the sub information, and (iii) the main information and the sub information; and
a defective area management unit operable to perform as follows when it is judged by the verification unit that at least one of the main information and the sub information has not been recorded normally:
relocate and record the sub information in a predetermined spare area of the optical disc; and
register, into a predetermined defect management area of the optical disc, information that associates the defective area with a replacement area inside the spare area to which the sub information in the defective area has been relocated.