JPH10154331A - Device and method for recording and reproducing and information recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical information recording and reproducing device which sets an optimum output value for recording laser light beams so as not to cause any signal quality degradation by cross erasing. SOLUTION: This recording and reproducing device records and reproduces data on the information recording medium having plural tracks. The device is provided with an optical head 4 which outputs laser beams, a driving circuit 6 which drives the head 4, a signal level measuring device 7 which measures the level of the signals reproduced from an information recording medium and a controller 8 which records data on one of the plural tracks employing the laser beams outputted from the head 4, controls the circuit 6 so that signals are reproduced from the adjacent track employing the device 7 and determines the optimum value of the laser output value outputted from the head 4 in accordance with the level of the signals reproduced from the adjacent track.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus, a recording / reproducing method, and an information recording medium, and more particularly to a recording / reproducing apparatus capable of obtaining an optimum output value of a recording laser.
The present invention relates to a recording / reproducing method and an information recording medium.

[0002]

2. Description of the Related Art In a recording / reproducing apparatus, the size of a mark formed on an information recording medium changes depending on the output value of a recording laser. Therefore, in order to ensure compatibility between information recording media and to accurately record data, it is necessary to appropriately set the output value of the recording laser. If the output value of the recording laser is insufficient, the mark becomes smaller. In this case, the level of the reproduced signal is reduced. For this reason, correct data cannot be reproduced. On the other hand, when an excessive output value of the recording laser is given, the mark becomes large. For this reason, a cross-erase occurs in which a signal is written not only to a track to which data is actually written, but also to a track adjacent to the track.

When a cross erase occurs, when data is written to a certain track (track A) on an adjacent track (track B), the data on track B overwrites the data on track A. For this reason,
The quality of the reproduction signal from the track A deteriorates. As a result, a correct reproduction signal cannot be obtained from the track A.

In general, information recording media have variations in characteristics. In addition, the surrounding environment changes. Therefore, the optimum output value of the recording laser is not constant. Therefore, conventionally, prior to data writing, recording and reproduction of test data are performed in a test area provided on an information recording medium, and the reproduction signal level is examined to set an optimum recording laser output value. Reproduction devices have been devised.

[0005]

However, the conventional recording / reproducing apparatus reproduces the test data from the track on which the test data is recorded. For this reason, the influence of the recording laser output on the adjacent track when an excessive recording laser output is given cannot be accurately estimated. As a result, there arises a problem that deterioration of signal quality due to cross erase cannot be prevented. In recent years, high-density recording is required for increasing the capacity of information recording media. For this reason, it is necessary to narrow the track of the information recording medium.
As a result, it is more important to solve the problem of signal quality deterioration due to cross erase.

The present invention solves the above problems. An object of the present invention is to provide a recording / reproducing apparatus, a recording / reproducing method, and an information recording medium which can set an optimum output value of a recording laser so that signal quality does not deteriorate due to cross erase.

[0007]

According to a first aspect of the present invention, there is provided a recording / reproducing apparatus for recording / reproducing data on / from an information recording medium having a plurality of tracks, comprising: an optical head for outputting a laser; A driving circuit for driving an optical head, a signal level measuring device for measuring a level of a signal reproduced from an information recording medium, and recording data on one of a plurality of tracks using a laser output from the optical head. And controlling the drive circuit to reproduce the signal from the track adjacent to the track on which the data is recorded, measuring the level of the signal reproduced from the adjacent track using a signal level measuring device, and And a controller that determines an optimum value of the output value of the laser output from the optical head in accordance with the level of the signal reproduced from the optical head.

According to a second aspect of the present invention, there is provided the recording / reproducing apparatus according to the first aspect, wherein the drive circuit changes the output value of the laser output from the optical head to a plurality of tracks. The optical head is driven so as to record data in one.

According to a third aspect of the present invention, there is provided the recording / reproducing apparatus according to the second aspect, wherein the drive circuit changes the laser output value by changing the laser power value. Features.

According to a fourth aspect of the present invention, there is provided the recording / reproducing apparatus according to the second aspect, wherein the driving circuit changes the laser output value by changing the duty ratio of the laser. Features.

According to a fifth aspect of the present invention, there is provided the recording / reproducing apparatus according to the first aspect, wherein the drive circuit changes one of a plurality of tracks while changing the focus of the laser output from the optical head. The optical head is driven so as to record data each time.

According to a sixth aspect of the present invention, there is provided the recording / reproducing apparatus according to the first aspect, wherein the plurality of tracks include:
A plurality of tracks having a first property and a plurality of tracks having a second property, wherein one of the plurality of tracks having the first property and one of the plurality of tracks having the second property alternate. And a controller for driving data to record data on one of the plurality of tracks having the first characteristic and to reproduce a signal from a track having the second characteristic adjacent to the track on which the data is recorded. The circuit is controlled.

According to a seventh aspect of the present invention, there is provided the recording / reproducing apparatus according to the sixth aspect, wherein the plurality of tracks having the first characteristic are provided in either a land portion or a groove portion. It is characterized by including a plurality of tracks.

According to another aspect of the present invention, there is provided a recording / reproducing method for recording / reproducing data on / from an information recording medium having a plurality of tracks, wherein the data is recorded on one of the plurality of tracks using a laser. And a first step of reproducing a signal from a track adjacent to the track on which data is recorded, and measuring a level of the signal reproduced from the adjacent track, and measuring the level of the signal reproduced from the adjacent track. And determining the optimum value of the output value of the laser.

The recording and reproducing method according to a ninth aspect is the recording and reproducing method according to the eighth aspect, wherein the first step comprises:
While changing the output value of the laser,
Recording data at the same time.

A recording and reproducing method according to a tenth aspect is the recording and reproducing method according to the ninth aspect, wherein an output value of the laser is changed by changing a power value of the laser.

The recording and reproducing method according to an eleventh aspect is the recording and reproducing method according to the ninth aspect, wherein the output value of the laser is changed by changing a duty ratio of the laser.

A twelfth aspect of the present invention is the recording / reproducing method according to the eighth aspect, wherein the first step includes changing the focus of the laser beam to one of a plurality of tracks. Is recorded.

A recording and reproducing method according to a thirteenth aspect is the recording and reproducing method according to the eighth aspect, wherein the plurality of tracks includes a plurality of tracks having a first characteristic and a plurality of tracks having a second characteristic. And one of the plurality of tracks having the first characteristic and one of the plurality of tracks having the second characteristic are provided alternately.
Data is recorded on one of a plurality of tracks having the characteristics of
Reproducing a signal from a track having the following characteristics:

A recording and reproducing method according to a fourteenth aspect is the recording and reproducing method according to the thirteenth aspect, wherein the plurality of tracks having the first characteristic are provided in either a land portion or a groove portion. It is characterized by including a plurality of tracks.

An information recording medium according to a fifteenth aspect is an information recording medium having a plurality of tracks on which data is recorded / reproduced, wherein the plurality of tracks include a track for recording data and a track for recording data. And a track for reproducing a signal adjacent to the selected track.

An information recording medium according to a sixteenth aspect is the information recording medium according to the fifteenth aspect, wherein the plurality of tracks include a plurality of tracks having a first characteristic and a plurality of tracks having a second characteristic. One of the plurality of tracks having the first characteristic and one of the plurality of tracks having the second characteristic are provided alternately, and one of the plurality of tracks having the first characteristic includes: Data is recorded, and a signal is reproduced from a track having a second characteristic adjacent to the track on which the data is recorded.

An information recording medium according to a seventeenth aspect is the information recording medium according to the sixteenth aspect, wherein the plurality of tracks having the first characteristic are provided in either a land portion or a groove portion. It is characterized by including a plurality of tracks.

An information recording medium according to claim 18 is the information recording medium according to claim 15, wherein the plurality of tracks are a track provided in a data zone and a track provided in a first zone. And data is recorded on a track provided in the first zone, and a signal is reproduced from a track provided in the first zone and adjacent to the track on which data is recorded. .

An information recording medium according to a nineteenth aspect is the information recording medium according to the eighteenth aspect, wherein the first zone includes a zone provided on an inner peripheral side with respect to the data zone. Features.

An information recording medium according to a twentieth aspect is the information recording medium according to the nineteenth aspect, wherein the first zone includes a zone provided on the outer peripheral side with respect to the data zone. And

An information recording medium according to a twenty-first aspect is the information recording medium according to the eighteenth aspect, wherein the first zone includes a zone provided on an outer peripheral side with respect to the data zone. Features.

An information recording medium according to a twenty-second aspect is the information recording medium according to the eighteenth aspect, wherein data is recorded on a first track provided in a data zone, provided in a data zone, The data is reproduced from a signal from a second track adjacent to the first track on which data is recorded.

An information recording medium according to claim 23 is the information recording medium according to claim 22, wherein the data zone includes a second data zone divided for each track under a predetermined condition. The first track and the second track are
It is characterized by being provided for each second data zone.

An information recording medium according to a twenty-fourth aspect is the information recording medium according to the fifteenth aspect, wherein data is recorded on a first track provided in a data zone, provided in a data zone, The data is reproduced from a signal from a second track adjacent to the first track on which data is recorded.

An information recording medium according to claim 25 is the information recording medium according to claim 24, wherein the data zone includes a second data zone divided for each track under a predetermined condition. The first track and the second track are
It is characterized by being provided for each second data zone.

The recording / reproducing apparatus of the present invention writes test data into a track in a test area on an information recording medium while changing the laser output value, and reproduces a reproduction signal level from a track adjacent to the track, The optimum output value of the recording laser can be obtained by comparing the level of the signal generated by the cross erase with a predetermined allowable level. For this reason, even if the information recording medium is replaced or the surrounding environment changes, it is possible to set the optimum output value of the recording laser so that the signal quality does not deteriorate due to the cross erase.

[0033]

Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an optical information recording / reproducing apparatus according to the present invention.

This optical information recording / reproducing apparatus comprises a motor 2 for rotating a disk 1 as an information recording medium on which data is recorded, and a rotation control circuit 3 for controlling the number of rotations of the motor 2.
An optical head 4 for irradiating the recording surface of the disk 1 with a laser beam from a semiconductor laser; and a laser drive for changing the output value of the laser beam emitted from the optical head 4 based on data sent from a controller 8 to be described later. Circuit 6
An actuator control circuit 5 for moving the optical head 4 in the radial direction of the disk 1, a signal level measuring circuit 7 for measuring a reproduction signal level obtained from the optical head 4, and controlling the entire apparatus, A controller 8 for performing processing for obtaining an optimum output value of the recording laser,
The memory 8 is a storage area used when the controller 8 performs various processes.

In this configuration, when information is recorded on the disk 1, an instruction from the controller 8 is transmitted to the rotation control circuit 3.
And the motor 2 rotates the disk 1 accordingly. Further, the controller 8 sends an instruction to the actuator control circuit 5, moves the optical head 4 to a target position on the disk 1, and obtains the optimum output value of the recording laser previously obtained by the following method and set in the laser drive circuit 6. Irradiate a laser beam and record data.

When reproducing the information recorded on the disk 1, the controller 8 sets the output value of the reproduction laser in the laser drive circuit 6 and irradiates the laser light from the optical head 4. The obtained reproduction signal is converted to a signal level measurement circuit 7
Is detected and sent to the controller 8, thereby obtaining recorded information.

With reference to the flowchart shown in FIG. 2, the operation of the optimum recording laser output calculating means according to the present invention will be described.

The processing for setting the optimum output value of the recording laser is performed immediately after the power to the optical information recording / reproducing apparatus of the present invention is turned on or when an information recording medium is newly inserted. Alternatively, this processing is performed as necessary when a change in the device environment occurs, such as when the device temperature changes beyond a certain range or when a specified time has elapsed after the operation of the device has started.

When setting the optimum output value of the recording laser, the optical head 4 seeks to a track in the test area and erases data on the track. This track is a track on which test data is reproduced later to obtain a reproduction signal necessary for obtaining an optimum output value of the recording laser. (Hereinafter, this track is referred to as a “test data reproduction track.”) Next, the optical head 4 moves to a track adjacent to the track from which data has been erased, and records test data of a predetermined pattern on that track. (Hereinafter, this track is referred to as a “test data recording track”). At this time, the optical head 4 performs recording by sequentially changing the power value of the recording laser. As a result, the width of the recorded mark changes sequentially for each mark. FIG. 3 shows an example of the test data recorded in this way. FIG. 3 shows an example in which recording is performed bit by bit, recording is started with low power, and the power is gradually increased.

Next, as shown in FIG.
Moves again to the test data reproduction track and reproduces the signal. At this time, the controller 8 performs a level determination process using the level value of the reproduction signal obtained from the signal level measurement circuit 7.

The level value of the reproduced signal is, for example, as shown in a waveform 10 in FIG. On the other hand, two level determination criteria 11 and 12 for determining the reproduction signal level value are set in advance. The controller 8 determines which signal of the mark of the test data is within the range of the two level determination criteria 11 and 12, and outputs the output value of the laser when a mark that satisfies the condition is written to the recording laser. The optimum output value is used. Here, the level determination criterion 11 is a value that has been set in advance from the allowable amount of cross erase for the adjacent track. The level criterion 12 is a signal level required for recording.

As described above, according to the present embodiment, the recording / reproducing apparatus can record data with an optimum recording laser output value even when there is a change in the surrounding environment or a variation in the recording sensitivity of the information recording medium. Can be recorded. Therefore, a mark of an appropriate size is always recorded on the recording medium. As a result, cross-erase can be prevented.

Next, a second embodiment of the present invention will be described with reference to the drawings. The operation of the optimum recording laser output calculation means according to the present invention in the configuration of FIG. 1 will be described with reference to the flowchart shown in FIG.

In the second embodiment, similarly to the processing described in the first embodiment, the optical head 4 seeks to the test area and erases data on the test data reproduction track. Then, the controller 8 records data on the test data recording track while changing the duty ratio of the laser output. For example, the recording laser waveform 13 shown in FIG.
As shown in (1), the controller 8 starts recording with a small duty ratio, and gradually increases the duty ratio. As in the first embodiment, when the optical head 4 reproduces the data recorded in this manner from the test data reproduction track, as shown in FIG. 6A, the reproduced signal 14 similar to that of FIG. Is obtained. As a result, an optimum output value of the recording laser can be calculated.

By recording data on the test data recording track while changing the focus of the laser, as in the first embodiment, when the optical head 4 reproduces a signal from the test data reproducing track, Figure 4
A reproduction signal 14 similar to that of (b) is obtained. As a result, an optimum output value of the recording laser can be calculated.

Next, a third embodiment of the present invention will be described with reference to the drawings. The operation of the optimum recording laser output calculation means according to the present invention in the configuration of FIG. 1 will be described with reference to FIG.

The information recording medium of this embodiment has a land portion and a groove portion as shown in FIG. 7A, and data is recorded on both of them. In this configuration, the optimum output value of the optimum recording laser is obtained in the same manner as in the processing described in the first and second embodiments. The calculation of the output value of the optimum recording laser is performed for each of the land portion and the groove portion of the information recording medium. That is, as shown in FIG. 7 (b), the recording / reproducing apparatus writes data while changing the laser output value on the track provided on the land 14 in the test area, and provides the data on the adjacent groove 15 The data is reproduced from the track thus obtained, and the optimum output value of the recording laser is calculated. Further, as shown in FIG. 7 (c), the recording / reproducing apparatus writes data while changing the laser output value to the track provided in the groove section 16 in the test area, and provides the data in the adjacent land section 17. The data is reproduced from the track thus obtained, and the optimum output value of the recording laser is calculated.

As described above, according to the present embodiment, it is possible to perform recording with the optimum output value of the recording laser even if the characteristics of the land portion and the groove portion of the information recording medium vary. Therefore, a mark of an appropriate size is always recorded on the recording medium. As a result, cross-erase is prevented.

In Embodiments 1, 2, and 3,
Although an example has been shown in which recording is performed by changing the laser output value for each bit of test data written to the test area, the present invention does not specify the format of test data for each bit, The configuration may be such that the output value of the laser is changed for each data of bits or more, for each sector, or the like. Further, the change in the output value of the laser may be changed continuously, or may be changed from a high power or a high duty ratio.

Further, the level judgment criteria 11 and 12 may be stored in the memory 9 or may be recorded on an information recording medium.

Next, a fourth embodiment of the present invention will be described.
With reference to FIGS. 8 to 13, an information storage medium used in the first to third embodiments of the present invention and a layout thereof will be described.

Referring to FIGS. 8 and 9, disc 1 has a data zone 82 for recording and reproducing data, a lead-in zone 81 provided on the inner circumference side of data zone 82, and an outer circumference side of data zone 82. And a readout zone 83 provided in the

Referring to FIG. 10, an example in which the test area is provided on the inner peripheral side with respect to the data zone of the disk is shown. The disk 1A is provided with a track 101A on which data is recorded and a track 102A adjacent to the track 101A on which data is recorded and for reproducing a signal, on the inner side with respect to the data zone 82.

Referring to FIG. 11, the test area may be provided on the outer peripheral side with respect to the data zone of the disk. On the disk 1B, a track 101B on which data is recorded and a track 102B adjacent to the track 101B on which data is recorded and for reproducing a signal are provided on the outer peripheral side with respect to the data zone 82.

For example, when the disk rotates at a constant linear velocity, the test area is provided on the inner side or outer side with respect to the data zone of the disk.

Referring to FIG. 12, an example in which a test area is provided in data zone 82 is shown. Adjacent to the track where data is recorded and the track where data is recorded,
A track for reproducing a signal is provided in the data zone 82. In the disc 1C, in the data zone 82,
A track 101C1 on which data is recorded and a track 102C1 for reproducing a signal are provided adjacent to the track 101C1 on which data is recorded.

A set of tracks for recording data and a track for reproducing signals may be provided adjacent to the track on which data is recorded and one set for each of a plurality of tracks. The disc 1C has a track 101C2 on which data is recorded and a track 101C2 on which data is recorded, in addition to the track 101C1 and the track 102C1.
And a track 102C2 for reproducing a signal.

When the disk rotates at a constant angular velocity, the linear velocity changes according to the radius of the disk. Therefore, it is effective to provide one set of test areas for each of a plurality of tracks.

Referring to FIG. 13, the layout of each track in the data zone when the test area is provided in the data zone will be described. The data zone includes a plurality of tracks. Each of the plurality of tracks includes a plurality of frames. Each of the plurality of frames includes an address segment and a plurality of data segments. The address segment includes a test area. Thus, the test area is provided in the address segment of the data zone. In the test area, data recording or reproduction is performed to determine an optimum laser output value.

The track on which data is recorded and the track on which the data is recorded are adjacent to the track on which data is to be reproduced. Both may be provided.

[0061]

As described above, according to the recording / reproducing apparatus of the present invention, test data is written to a track in a test area on an information recording medium while changing the output value of a laser, and a track adjacent to the track is written. The optimum output value of the recording laser can be obtained by comparing the reproduction signal level of the recording laser with the predetermined allowable level of the signal value generated by the cross erase.
For this reason, the recording / reproducing apparatus can set an optimum recording laser output value which does not cause signal quality deterioration due to cross erase even when the information recording medium is replaced or the surrounding environment changes.

[Brief description of the drawings]

FIG. 1 is a configuration block diagram of an optical information recording / reproducing apparatus according to the present invention.

FIG. 2 is a flowchart illustrating an operation of an optimum recording laser output calculation unit according to the first embodiment of the present invention.

FIG. 3 is a diagram showing an example of recording test data in a test area according to the first embodiment of the present invention.

FIG. 4 is a diagram showing a reproduction signal of test data in a test area and a level determination criterion.

FIG. 5 is a flowchart illustrating an operation of an optimum recording laser output calculation unit according to the second embodiment of the present invention.

FIG. 6 is a diagram illustrating signal reproduction and a level determination criterion in a test area according to the second embodiment of the present invention.

FIG. 7 is a diagram illustrating signal reproduction and a level determination criterion in a test area according to Embodiment 3 of the present invention.

FIG. 8 is an explanatory diagram of an information storage medium according to a fourth embodiment of the present invention.

FIG. 9 is an explanatory diagram of a layout of an information storage medium according to a fourth embodiment of the present invention.

FIG. 10 is an explanatory diagram of a test area of an information storage medium according to Embodiment 4 of the present invention.

FIG. 11 is an explanatory diagram of a test area of an information storage medium according to Embodiment 4 of the present invention.

FIG. 12 is an explanatory diagram of a test area of an information storage medium according to Embodiment 4 of the present invention.

FIG. 13 is an explanatory diagram of a layout of an information storage medium according to a fourth embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 disk 4 optical head 5 actuator control circuit 6 laser drive circuit 7 signal level measurement circuit 8 controller

Claims (25)

[Claims] 1. A recording / reproducing apparatus for recording / reproducing data on / from an information recording medium having a plurality of tracks, comprising: an optical head for outputting a laser; a driving circuit for driving the optical head; A signal level measuring device for measuring the level of the signal obtained, and recording data on one of the plurality of tracks by using the laser output from the optical head, and recording the data on the track on which the data is recorded. Controlling the drive circuit to reproduce the signal from the adjacent track, measuring the level of the signal reproduced from the adjacent track using the signal level measuring device, and measuring the level of the signal reproduced from the adjacent track. A recording / reproducing apparatus comprising: a controller that determines an optimum value of an output value of the laser output from the optical head according to a level. 2. The drive circuit drives the optical head to record the data on one of the plurality of tracks while changing the output value of the laser output from the optical head. The recording / reproducing apparatus according to claim 1. 3. The recording / reproducing apparatus according to claim 2, wherein the drive circuit changes the output value of the laser by changing a power value of the laser. 4. The recording / reproducing apparatus according to claim 2, wherein the drive circuit changes the output value of the laser by changing a duty ratio of the laser. 5. The drive circuit according to claim 1, wherein the drive circuit drives the optical head to record the data on one of the plurality of tracks while changing the focus of the laser output from the head. The recording / reproducing apparatus according to claim 1. 6. The plurality of tracks include a plurality of tracks having a first property and a plurality of tracks having a second property, wherein one of the plurality of tracks having the first property and a second property. The controller records data on one of the plurality of tracks having the first characteristic, and is adjacent to the track on which the data is recorded. The recording / reproducing apparatus according to claim 1, wherein the drive circuit is controlled so as to reproduce a signal from a track having the second characteristic. 7. The recording / reproducing apparatus according to claim 6, wherein the plurality of tracks having the first characteristic include a plurality of tracks provided on either a land portion or a groove portion. 8. A recording / reproducing method for recording / reproducing data on / from an information recording medium having a plurality of tracks, the method comprising: recording data on one of the plurality of tracks using a laser; A first step of reproducing a signal from a track adjacent to the track, measuring a level of the signal reproduced from the adjacent track, A second step of determining an optimum output value. 9. The recording / reproducing method according to claim 8, wherein the first step includes a step of recording the data on one of the plurality of tracks while changing the output value of the laser. . 10. The recording / reproducing method according to claim 9, wherein an output value of the laser changes by changing a power value of the laser. 11. The output value of the laser is changed by changing a duty ratio of the laser.
Recording / reproducing method described in 1. 12. The recording / reproducing method according to claim 8, wherein the first step includes a step of recording the data on one of the plurality of tracks while changing a focus of the laser. 13. The plurality of tracks includes a plurality of tracks having a first characteristic and a plurality of tracks having a second characteristic, wherein one of the plurality of tracks having the first characteristic and a second characteristic. And the first step records data on one of the plurality of tracks having the first characteristic, and the track on which the data is recorded 9. The recording / reproducing method according to claim 8, further comprising the step of reproducing a signal from a track having a second characteristic adjacent to the track. 14. The recording / reproducing method according to claim 13, wherein the plurality of tracks having the first characteristic include a plurality of tracks provided on either a land portion or a groove portion. 15. An information recording medium having a plurality of tracks on which data is recorded / reproduced, wherein the plurality of tracks are adjacent to the track for recording data and the track on which the data is recorded. And an information recording medium including a track for reproducing a signal. 16. The plurality of tracks includes a plurality of tracks having a first characteristic and a plurality of tracks having a second characteristic, wherein one of the plurality of tracks having the first characteristic and a second characteristic. And data is recorded on one of the tracks having the first characteristic, and a second characteristic adjacent to the track on which the data is recorded is provided. The information recording medium according to claim 15, wherein a signal is reproduced from a track having the following. 17. The information recording medium according to claim 16, wherein the plurality of tracks having the first characteristic include a plurality of tracks provided on either a land portion or a groove portion. 18. The plurality of tracks include a track provided in a data zone and a track provided in a first zone, and data is recorded on the track provided in the first zone. 16. The information recording medium according to claim 15, wherein a signal is reproduced from a track provided in the first zone and adjacent to a track on which the data is recorded. 19. The information recording medium according to claim 18, wherein said first zone includes a zone provided on an inner peripheral side of said data zone. 20. The information recording medium according to claim 19, wherein the first zone includes a zone provided on an outer peripheral side with respect to the data zone. 21. The information recording medium according to claim 18, wherein the first zone includes a zone provided on an outer peripheral side with respect to the data zone. 22. Data is recorded on a first track provided in the data zone, and data is recorded from a second track provided in the data zone and adjacent to the first track on which the data is recorded. 19. The information recording medium according to claim 18, which is reproduced. 23. The data zone includes a second data zone divided for each track under a predetermined condition, wherein the first track and the second track are provided for each of the second data zones. The information recording medium according to claim 22, which is provided. 24. Data is recorded on a first track provided in the data zone, and data is recorded from a second track provided in the data zone and adjacent to the first track on which the data is recorded. The information recording medium according to claim 15, which is reproduced. 25. The data zone includes a second data zone divided for each track under a predetermined condition, and the first track and the second track are provided for each of the second data zones. The information recording medium according to claim 24, wherein the information recording medium is provided.