(12) United States Patent ao) Patent No.: us 6,208,603 Bi
Ishida et al. (45) Date of Patent: Mar. 27,2001
(54) OPTICAL DISK, OPTICAL DISK DEVICE, AND METHOD OF REPRODUCING INFORMATION ON OPTICAL DISK
(75) Inventors: Takashi Ishida, Yawata; Toyqji Gushima, Habikino, both of (JP)
(73) Assignee: Matsushita Electric Industrial Co., Ltd., Kadoma (JP)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 0 days.
(21) Appl. No.: 09/117,825
(22) PCT Filed: Feb. 7, 1997
(86) PCT No.: PCT/JP97/00337 § 371 Date: Dec. 14, 1998
§ 102(e) Date: Dec. 14, 1998
(87) PCT Pub. No.: W097/29483 PCT Pub. Date: Aug. 14, 1997
(30) Foreign Application Priority Data
Feb. 8, 1996 (JP) 8-022273
(51) Int. CI. G11B 7/00
(52) U.S. CI 369/59; 369/275.3
(58) Field of Search 369/59, 275.3,
369/48, 47, 58
(56) References Cited
U.S. PATENT DOCUMENTS
4,949,330 * 8/1990 Pasman et al 369/118
5,134,601 * 7/1992 Greenwell et al 369/44.26
5,359,584 * 10/1994 Fukushima et al 369/58
5,544,149 * 8/1996 Katayama et al 369/275.3
FOREIGN PATENT DOCUMENTS
0673029 12/1994 (EP) .
0757343 * 2/1997 (EP) 369/275.3
57-164443 10/1982 (JP) .
61-104467 5/1986 (JP) .
61-287077 12/1986 (JP) .
(List continued on next page.)
JPO Office Action dated Dec. 9, 1999 for JP Application 11-233311 and translation thereof.*
JPO Office Action dated Dec. 9, 1999 for JP Application 11-233312 and translation thereof.*
JPO Office Action dated Dec. 9, 1999 for JP Application 11-233313 and translation thereof.*
JPO Office Action dated Dec. 9, 1999 for JP Application 11-233314 and translation thereof.*
European Office Action dated Nov. 9, 1999 for corresponding European App. EP97902635.8.
International Search Report for Application No. PCT/JP97/ 00337; Mailed on May 20, 1997.*
Primary Examiner—Nabil Hindi
(74) Attorney, Agent, or Firm—Renner, Otto, Boisselle & Sklar LLP
The present invention is aimed at providing an optical disk, an optical disk device, and an optical disk reproduction method, for allowing for stable and efficient reading of address information. The optical disk includes a plurality of tracks each divided into a plurality of recording sectors. Each of the recording sectors includes a header region. The header region includes address information for identifying the position of the corresponding recording sector and address synchronous information for identifying the recording position of the address information for bit synchronization. The address information has been modulated using a run length limit code of a maximum inversion interval of Tmax bits (Tmax is a natural number), and the address synchronous information includes two patterns of which inversion interval is (Tm(n.+3) bits or more, so that the reproduced signal of the address synchronous information is distinguished from the reproduced signal of other information.
2 Claims, 25 Drawing Sheets