Optical information-carrying medium

FIELD: optical information-carrying mediums.

SUBSTANCE: optical information-carrying medium consist of lead-in zone, lead-out zone and user data zone between lead-in and lead-out zones which carries user data. Pits are formed in lead-in zone, in user data zone and lead-out zone. Track pitch in all lead-in zone or its part differs from track pitch in all other zones of optical information-carrying medium. Because of reduced tracking errors and reduced cross-talk the playback of important information reliability is increased.

EFFECT: increased reliability which ensures recording and/or playback effectiveness.

31 cl, 5 dwg

 

The technical field to which the invention relates.

The present invention relates to optical storage media and, in particular, to optical recording media, in which the pitch of the track throughout the introductory area or part thereof is different from the pitch of the track in other areas of the optical media, in order to improve the reliability of playback, important information related to optical storage media.

Prior art

Optical discs are generally used as storage media optical scanning devices that record information on the optical disc and/or reproduce information with them, not contacting with the optical drives. Optical disks are classified as either compact discs (CD) or digital versatile disks (DVD), depending on their capacity of data recording. CD and DVD also include CD-R (CD write-once) and CD-RWS (rewritable CDS) with a capacity of 650 MB, rewritable DVD format DVD+RW, DVD-random access memory (DVD-RAM), DVD-R (DVD write-once), rewritable DVD format DVD-RW, etc. with a capacity of 4.7 GB. Disks with read-only include a CD with a capacity of 650 MB, DVD-ROM storage capacity of 4.7 GB, etc. were also developed digital versatile disks of high density (HD-DVD)having a recording capacity of 20 GB or more

Were studied various ways of increasing the recording capacity of optical discs. One way to increase the recording capacity is to reduce the size of the optical spot focused on the optical disk. To reduce the size of the optical spot it is necessary to reduce the wavelength of the laser light source or increasing the numerical aperture (CHA, NA) of the lens. In addition, it is necessary to reduce the pitch of the track of the optical disk. The pitch of the track means the minimum distance, measured from the center line of one track to the main line adjacent track.

Figure 1 shows the structure of a conventional DVD-ROM 110. DVD-ROM 110 includes the area 105 of the user data, where the recorded user data. Within region 105 of the user data formed the introductory area 100. Out-of-area 105 of the user data generated input area 110. In the introductory zone 100, the area 105 of the user data and lead zone 110, the data recorded in the form of points. In addition, in the introductory zone 100, the area 105 of the user data and lead zone 110, the pitch of the track is equal to 0.74 μm.

When increasing the recording capacity is predicted to decrease the pitch of the track. However, because the optical spot focused on the track, can reach adjacent track, with a decrease of the pitch of the track increases the likelihood of crosstalk. When Vozniknovenie interference is abnormal sound. Thus, when reducing the pitch of the track increases the abnormal reproduction of information.

In particular, if the information is not normal is reproduced from the zone in which the recording and/or reproduction of data recorded important information this is an abnormal playback can significantly affect the efficiency of recording and/or playback of a disc. Accordingly, the pitch of the track must be adjusted in accordance with increase of the recording capacity of the storage environment and the importance of data.

The invention

According to the present invention is represented optical storage medium, in which the pitch of the track in the zone in which the recorded important information associated with the optical storage medium is different from the pitch of the track in the user data area in which the recorded user data, which improves the efficiency and reliability of the playback data.

Additional aspects and/or advantages of the invention partially set forth in the following description and partially made it clear from the description or may be learned through practical use of the invention.

According to the aspect of the present invention is an optical storage medium includes an introductory area, output area, which is formed outside the input area, and a user data area, RA is put between the inlet and outlet zones, and in which the recorded user data, and the holes formed in the first track introductory zone, the second track of the other zones, including a user data area and a lead area, and the pitch of the track between adjacent first tracks in all introductory area or part thereof is different from the pitch of the track between adjacent second and/or third tracks in other areas of the optical media.

Preferably, but not necessarily to the first step of the tracks was more than a second pitch of the track in other areas of the optical media.

According to the aspect of the invention introductory area includes the area in which the recorded information associated with the optical storage medium, and a zone in which the recorded information of the copy protection.

Preferably, but not necessarily to the first step of the tracks in at least one zone input zone was more than a second pitch of the track in other areas of the optical media.

Preferably, but not necessarily to the ratio of the signals of the tracking error (tracking tracks), registered in the zone, with the first pitch of the track, signals, error tracking, registered in the zone having the second pitch of the track was 1.5 or more.

List of figures

Figure 1 - schematic structure of the conventional DVD-ROM.

Figure 2 - the Hema structure of the optical information medium according to a variant implementation of the present invention.

Figa - error signal tracking phase (differential signal detection phase (DDF, DPD)when the pitch of the track is equal to 0.32 μm.

Figw - error signal tracking phase (signal DDF), when the pitch of the track is equal to 0.35 μm.

4 is a block diagram of a recording device and/or playback according to a variant implementation of the present invention.

Preferred embodiments of the inventions

According to figure 2, the optical device 1000, according to a variant implementation of the present invention, includes a user data area of 15, the lead-in area 10, formed in the zone 15 of the user data, and the output area 20 formed outside the zone 15 of the user data and input zone 10. The first step of the tracks throughout the introductory zone 10 or part thereof is different from the second pitch of the track in other areas of the optical media 1000 information, including a user data area of 15 and outlet zone 20.

Introductory area 10 includes zone, which contains important data during playback of optical media. Examples of important data include information associated with the optical information medium, which is recorded in zone 10A, and information of copy protection, which is recorded in zone 10b. Information associated with the optical storage medium, contains information about the media type (for example, whether the media 1000 rewritable disk drive write-once or disc read-only), information on the number of recording layers, the information about the recording speed, information on the size of the optical media 1000 (disk).

Preferably, but not necessarily to the pitch of the track in at least one of the zones 10a and 10b was equal to the first step of the track, which is greater than the second step tracks in all other zones except zones 10a and 10b. It is clear that it is possible to record additional important information during playback of optical media 1000 information, and the step track throughout the introductory zone 10 can be the first step of the track, which is greater than the second step tracks in other zones of the optical storage media 1000.

The optical information medium according to a variant implementation of the present invention is an optical storage medium with a read-only. Holes formed everywhere in the introductory zone 10, zone 15 user data and lead in zone 20. In the manufacture of options exercise of optical media 1000 information with read-only holes are formed in the substrate in advance. If data is written in the form of dimples, the dimples can be formed in the introductory zone 10 and zone 15 user data without stopping the process which is of the dimples. Thus, it is possible to simplify the manufacturing process of the optical storage medium and to reduce the time required for the process.

One way transaction tracking using dimples is a differential method detection phase (DDF). For example, a method DDF is used to implement a recognition system tracks depending on the phase shift of the optical spot focused on double the photodetector. Method DDF well known and therefore will not be described in detail. According to the method DDF, when the steps of the tracks in the optical storage media are different, the output signals of the tracking error (for example, a differential signal of the tracking error phase) vary. For example, on figa shows the signal DDF, when the pitch of the track is equal to 0.32 μm, and figv shows the signal DDF, when the pitch of the track is equal to 0.35 μm. In this case, output the same power of the playback signal amplitude of the tracking error phase signal DDF) when the pitch of the track is 0.32 μm was about 1.46 Century, on the Contrary, the signal amplitude DDF when the pitch of the track 0.35 μm was about 2.31 C. Thus, the signal amplitude DDF with a larger pitch of the track is about 1.58 times greater than the amplitude of the signal DDF with a smaller pitch of the track. From figa and 3B, it follows that when increasing the pitch of the track signal amplitude is DF increases. Due to the increase in the amplitude of the signal DDF increases the efficiency of error detection. Thus, by increasing the pitch of the track increases the efficiency and reliability of playback.

In the simulation it was found that when the pitch of the track SM in zone 10A or in the zone 10b is equal to I, and the step track SM in other zones of the optical storage medium is equal to II, preferably, but not necessarily to the attitude error signal tracking, in particular the error signal of the tracking phase, in each of the steps track SM was 1.5 or more, which is expressed by the following equation 1:

The optical information medium according to the options of implementing the present invention can be applied to optical recording media having one or more surfaces of the recording. In other words, if the optical storage medium has a set of recording surfaces, the pitch of the track throughout the introductory area or part thereof for each of the set of surfaces entries may exceed the pitch of the track in other areas of each of the set of surfaces of the recording. Accordingly, the pitch of the track in parts of the input zone, which contains important information, may be greater than the pitch of the track in other areas of the optical media, which improves the reliable is here playing important information.

Although it is not specifically limited, it should be understood that the storage medium may include CD-R, CD-RW, DVD-RW, DVD-RAM, DVD+RW, and DVD high density next generation, such as Blu-ray and advanced optical disk (AOD). In addition, it is obvious that the media is not obliged to include input and/or output zones.

Figure 4 shows the block diagram of the recorder and/or playback according to a variant implementation of the present invention. According to figure 4, the recording device includes a unit 1001 write/read controller 1002 and memory 1003. Block 1001 read/write writes data to the disk 1000, which is the embodiment of the carrier 1000 information that meets the present invention, and reads the data from disk 1000. The controller 1002 records and reproduces data from the tracks, with the first and second steps of the track according to the present invention, as described above with reference to figure 2-3B.

Although not required in all aspects, it should be understood that the controller 1002 may be a computer, implements a method using a computer program encoded on a machine-readable carrier. The computer may be implemented as a chip with firmware, or may be a General computer or a special purpose, programmiruemyi for implementing the method.

In addition, it should be understood that to achieve the capacity recording in a few dozen gigabytes block 1001 read/write may include a block with a small wavelength and a large numerical aperture, which can be used to record dozens of gigabytes of data on the disk 1000. Examples of such units include, but without limitation, blocks, using light with a wavelength of 405 nm and having a numerical aperture of 0.85, and these units are compatible with Blu-ray and/or these units are compatible with the "enhanced optical disk (AOD).

Although the present invention has been specifically shown and described with references to his illustrative embodiments of specialists in this field should understand that it is possible to offer various changes concerning its form and detail, without going beyond the nature and scope of the present invention specified in the following claims and its equivalents.

Industrial application

As described above, in the optical information carrier, which meets the present invention, the step of tracks in the area, such as the information related to optical storage media, or in the area of information copy protection, which contains important information is greater than the pitch of the track in other areas of the optical media. Thus, it is possible to achieve surface is suitable for high-reliability playback, important information without deterioration of signal quality due to crosstalk, what is happening between adjacent tracks during playback of important information.

1. Optical storage media that contains the introductory area, outlet area and a user data area formed between the inlet and outlet zones, in which the recorded user data, and the holes formed in the tracks introductory zone, user data and lead area, and the first step paths between adjacent tracks in all introductory area or in part different from the second pitch of the track between adjacent tracks in other areas of the optical media.

2. The optical information medium according to claim 1, in which the first pitch of the track is greater than the second step of the track.

3. The optical information medium according to claim 2, in which the introductory area contains the first subzone in which the recorded information associated with the optical storage medium, and a second subzone, in which the recorded information, copy protection, and the pitch of the track in at least one of the subbands is the first step of the track.

4. The optical information medium according to claim 3, in which the ratio of the signals of the error tracking, registered in at least one of the first and second sub-zone having the first pitch of the track, signals, error tracking, registered in the zones having the second pitch of the track, is 1.5 or more.

Haptically storage medium according to claim 4, in which the ratio of the differential signal of the tracking error phase, registered in at least one of the first and second sub-zone having the first pitch of the track, to a differential signal of the tracking error phase, registered in the zones having the second pitch of the track, is 1.5 or more.

6. The optical information medium according to claim 1, in which the introductory area contains the first subzone in which the recorded information associated with the optical storage medium, and a second subzone, in which the recorded information, copy protection, and the pitch of the track in at least one of the first and second sub-zones is the first step of the track, which is greater than the second step of the track.

7. The optical information medium according to claim 6, in which the ratio of the signals of the error tracking, registered in at least one of the first and second sub-zone having the first pitch of the track, signals, error tracking, registered in the zones having the second pitch of the track, is 1.5 or more.

8. The optical information medium according to claim 7, in which the ratio of the differential signal of the tracking error phase, registered in at least one of the first and second sub-zone having the first pitch of the track, to a differential signal of the tracking error phase, registered in the zones having the second pitch of the track is 1.5 or more.

9. The optical information medium according to claim 1, which has more than one surface of the record.

10. Optical recording medium for recording data tracks containing the first zone, in which the first data recorded in the respective first paths, and the pair of adjacent first tracks have a first pitch of the track, and a second zone in which the second data is written into the corresponding second track, and the pair of adjacent second tracks have a second pitch of the track, different from the first pitch of the track.

11. The optical information medium of claim 10, in which the first zone is within the induction zone of the optical storage medium.

12. The optical information medium according to claim 11, in which the introductory area includes the additional data recorded in the additional tracks, and a pair of adjacent additional tracks have a different pitch of the track, different from the first pitch of the track.

13. The optical information medium according to item 12, in which another step track is the second step of the track.

14. The optical information medium according to claim 11, in which the first data contains information used when reproducing the second data.

15. The optical information medium of claim 10, in which the first data contains information used when reproducing the second data.

16. The optical information medium of claim 10, in which the torus second area includes a user data area of the optical media.

17. The optical information medium according to clause 16, in which the first data contains information used when reproducing the second data.

18. The optical information medium according to clause 16, in which the second zone includes a lead area located outside the user data area, and lead area includes additional data other than the second data.

19. The optical information medium according to 17, in which the first zone is part of the induction zone and the second zone includes another part of the introductory zone.

20. The optical information medium according to claim 19, in which the second zone includes a lead area located outside the user data area, and lead area includes additional data other than the second data.

21. The device for optical data transfer with respect to the optical information medium containing optical unit for transferring the first data with respect to the first track in the first zone of the optical storage medium and to transfer the second data to the second track in the second zone of the optical storage medium other than the first zone, and a controller to control an optical unit for transferring first and second data relative to the respective first and second zones, with pair of adjacent first tracks are PE the first step, and a pair of adjacent second tracks have a second step, different from the first step.

22. The device according to item 21, in which the first zone is within the induction zone of the optical storage medium.

23. The device according to item 22, in which the introductory area includes the additional data recorded in the additional tracks, and a pair of adjacent additional tracks have a different pitch of the track, different from the first pitch of the track.

24. The device according to item 23, in which another step track is the second step of the track.

25. The device according to item 21, in which the first data contain information used by the controller to play the second data.

26. The device according to item 21, in which the controller uses a differential signal for the tracking when moving the first and/or second data with respect to the optical storage medium, and the first differential signal registered from the first data recorded in the first track is different from the second differential signal registered from the second data recorded in the second track.

27. The device according to item 21, in which the second area includes a user data area of the optical storage medium and the second data is user data, the controller reproduces and/or records in the zone user Yes the data.

28. The device according to item 27, in which the first data contain information used by the controller during playback of the second data.

29. The device according to item 27 in which the second zone includes a lead area located outside the user data area, and lead area includes additional data other than the second data.

30. The device according to p, in which the first zone is part of the induction zone and the second zone includes another part of the introductory zone.

31. The device according to item 30, in which the second zone includes a lead area located outside the user data area, and lead area includes additional data other than the second data.



 

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