Claims
- 1. A method of recording pre-information onto an information record medium, the method comprising the steps of:generating a pre-information timing signal one after another at an interval corresponding to a plurality of record information units to be recorded onto the information record track; and recording the pre-information in a discrete manner on the basis of a timing corresponding to the pre-information timing signal onto an area to be irradiated by a portion of a light beam when the light beam is located on an information record track of the information record medium, on which record information is to be recorded, wherein the step of recording the pre-information records the pre-information onto the area at an interval corresponding to every other record information unit.
- 2. The method according to claim 1, wherein the step of recording the pre-information records the pre-information onto the area which is not on the information record track.
- 3. The method according to claim 1, wherein the step of recording the pre-information records the pre-information onto areas corresponding to record information units having even numbers in a recording sector, andwherein the recording sector is to be constituted by a predetermined number of the record information units.
- 4. The method according to claim 3, wherein the step of recording the pre-information records some of the pre-information the areas corresponding to record information units having odd numbers in the recording sector so that the pre-information adjacent to each other in a radial direction are not to be positioned on a straight line in the radial direction.
- 5. The method according to claim 4, wherein the pre-information includes synchronization pre-information corresponding to the information units having the even numbers and the synchronization pre-information corresponding to the record information units having the odd numbers have patterns different from each other.
- 6. An apparatus for recording pre-information onto an information record medium, the apparatus comprising:a generating unit which generates a pre-information timing signal one after another at an interval corresponding to a plurality of record information units to be recorded onto the information record track; and a recording unit which records the pre-information in a discrete manner on the basis of a timing corresponding to the pre-information timing signal onto an area to be irradiated by a portion of a light beam when the light beam is located on an information record track of an information record medium, on which record information is to be recorded, wherein the recording unit records the pre-information onto the area at an interval corresponding to every other record information unit.
- 7. The apparatus according to claim 6, wherein the recording unit records the pre-information onto the area which is not on the information record track.
- 8. The apparatus according to claim 6, wherein the recording unit records the pre-information onto areas corresponding to record information units having even numbers in a recording sector, andwherein the recording sector is to be constituted by a predetermined number of the record information units.
- 9. The apparatus according to claim 8, wherein the recording unit records some of the pre-information onto areas corresponding to record information units having odd numbers in the recording sector so that the pre-information adjacent to each other in a radial direction are not to be positioned on a straight line in the radial direction.
- 10. The apparatus according to claim 9, wherein the pre-information includes synchronization pre-information corresponding to the information units having the even numbers and the synchronization pre-information corresponding to the information units having the odd numbers have patterns different from each other.
- 11. An apparatus for recording pre-information onto an information record medium for a position retrieval at a time of recording record information on an information record track, on which record information is to be recorded, the apparatus comprising:a generating unit which generates a pre-information timing signal; and a recording unit which records the pre-information onto the information record medium per a plurality of record information units to be recorded onto the information track on the basis of a timing corresponding to the pre-information timing signal.
- 12. An information record medium comprising:an information record track on which record information is to be recorded and; pre-information formed on an area to be irradiated by a portion of a light beam when the light beam is located on the information record track, wherein the pre-information is formed in a discrete manner at an interval corresponding to a plurality of record information units to be recorded onto the information record track, wherein the pre-information is recorded at the interval corresponding to every other record.
- 13. The medium according to claim 3, wherein the pre-information is not formed on the information record track.
- 14. The medium according to claim 13, wherein a predetermined number of the record information units constitutes a recording sector, andwherein the pre-information is recorded in areas corresponding to information units having even numbers in the recording sector.
- 15. The medium according to claim 14, whereinsome of the pre-information is formed in areas corresponding to information units having odd numbers in the recording sector so that the pre-information adjacent to each other in a radial direction are not to be positioned on a straight line in the radial direction.
- 16. The medium according to claim 15, whereinthe pre-information includes synchronization pre-information and data pre-information, and wherein the synchronization pre-information corresponding to the information units having the even numbers and the synchronization pre-information corresponding to the information units having the odd numbers have patterns different from each other.
- 17. An information record medium comprising:an information record track on which record information is to be recorded and; pre-information for a position retrieval at a time of recording the record information on the information record track; wherein the pre-information is formed per a plurality of record information units to be recorded onto the information record track.
- 18. A method of recording record information onto information record medium, the information record medium comprising:an information record track on which record information is to be recorded and; pre-information formed on an area to be irradiated by a portion of a light beam when the light beam is located on the information record track, wherein the pre-information is formed in a discrete manner at an interval corresponding to a plurality of record information units to be recorded onto the information record track, the method comprising the steps of: irradiating the light beam onto the information record medium; detecting the pre-information from the light beam reflected by the information record medium; recording the record information onto the information record track using the detected pre-information, wherein the pre-information is recorded at the interval corresponding to every other record information unit.
- 19. The method according to claim 18, wherein the pre-information is not formed on the information record track.
- 20. The method according to claim 18, wherein a predetermined number of the record information units constitutes a recording sector, andwherein the pre-information is recorded in areas corresponding to record information units having even numbers in the recording sector.
- 21. The method according to claim 20, whereinsome of the pre-information is formed in areas corresponding to record information units having odd numbers in the recording sector so that the pre-information adjacent to each other in a radial direction are not to be positioned on a straight line in the radial direction.
- 22. The method according to claim 21, whereinthe pre-information includes synchronization pre-information and data pre-information, and wherein the synchronization pre-information corresponding to the record information units having the even numbers and the synchronization pre-information corresponding to the record information units having the odd numbers have patterns different from each other.
- 23. An apparatus for recording record information onto information record medium, the information record medium comprising:an information record track on which record information is to be recorded and; pre-information formed on an area to be irradiated by a portion of a light beam when the light beam is located on the information record track; wherein the pre-information is formed in a discrete manner at an interval corresponding to a plurality of information units to be recorded onto the information record track, the apparatus comprising: a pickup which irradiates the light beam onto the information record medium; a pre-information detector which detects the pre-information from the light beam reflected by the information record medium; and a controller which controls a recording to the record information onto the information record track using the detected pre-information, wherein the pre-information is recorded at the interval corresponding to every other record information unit.
- 24. The apparatus according to claim 23, wherein the pre-information is not formed on the information record track.
- 25. The apparatus according to claim 23, wherein a predetermined number of the record information units constitutes a recording sector, andwherein the pre-information is recorded in areas corresponding to record information units having even numbers in the recording sector.
- 26. The apparatus according to claim 25, whereinsome of the pre-information is formed in areas corresponding to record information units having odd numbers in the recording sector so that the pre-information adjacent to each other in a radial direction are not to be positioned on a straight line in the radial direction.
- 27. The apparatus according to claim 26, whereinthe pre-information includes synchronization pre-information and data pre-information, and wherein the synchronization pre-information corresponding to the record information units having the even numbers and the synchronization pre-information corresponding to the record information units having the odd numbers have patterns different from each other.
- 28. An apparatus for recording record information onto information record medium, the information record medium comprising:an information record track on which record information is to be recorded and; pre-information for a position retrieval at a time of recording the record information on the information record track; wherein the pre-information is formed per a plurality of information units to be recorded onto the information record track, the apparatus comprising: a pickup which irradiates the light beam onto the information record medium; a pre-information detector which detects the pre-information from the light beam reflected by the information record medium; and a controller which controls a recording of the record information onto the information record track using the detected pre-information.
- 29. The apparatus according to claim 23, further comprising:a clock signal generator which generates the clock signal synchronized with detected pre-information; and an address detector which detects address information from the pre-information, indicating an address on the information record medium, wherein the controller controls the recording of the record information onto the information record track using the detected address information and on the basis of the clock signal.
Priority Claims (1)
Number |
Date |
Country |
Kind |
P8-4421 |
Jan 1996 |
JP |
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CROSS REFERENCE TO RELATED APPLICATIONS
This is a continuation of U.S. patent application Ser. No. 09/218,681 filed on Dec. 22, 1998 now abandoned which is a division of U.S. patent application Ser. No. 08/780,288 filed on Jan. 8, 1997 which issued as U.S. Pat. No. 5,901,123 on May 4, 1999.
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Continuations (1)
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Number |
Date |
Country |
Parent |
09/218681 |
Dec 1998 |
US |
Child |
10/178649 |
|
US |