JP2001067678A - Information recording medium, medium manufacturing device, information detecting device and information recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a DVD-R/W which is capable of recording recording information based on a recording clock signal having high accuracy and high reliability at the time of recording the recording information and also which is capable of obtaining address information more numerously and more correctly in a shorter time, and the cutting device of the DVD-R/W or the like. SOLUTION: This informant recording medium is provided with land tracks 3 which are formed so that they are adjacent to a groove track 2 on which recording information are to be recorded and on which prepit information to be used for controlling the recording information by being reproduced at the time of recording the recording information are recorded by prepits 4, and the groove track 2 which is formed while having wobbles made to correspond to wobbling signals obtained by multiplexing a subfrequency signal having the fixed subfrequency higher than a fundamental frequency to a fundamental frequency signal having the fundamental frequency which is preset and fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of an information recording medium, a medium manufacturing device, an information detecting device, and an information recording device including the information detecting device.
A recordable information recording medium on which control information used for controlling recording of the recording information is reproduced in advance when recording the recording information, and a medium manufacturing apparatus for manufacturing the information recording medium, and The present invention belongs to the technical field of an information detecting device for detecting the control information from the information recording medium when recording the recording information, and an information recording device including the information detecting device.

[0002]

2. Description of the Related Art In recent years, a DVD-R, which is an optical disk whose recording density is several times higher than that of a conventional compact disk-recordable (CD-R) as a recordable conventional optical disk.
(DVD-Recordable; DVD that can be recorded only once) or DVD-R / W (DVD-ReWritable; DVD that can be overwritten multiple times) has been developed.
-R or DVD-R / W (hereinafter, simply referred to as DVD-R / W in the related art section), an information recording apparatus for recording information as discrete prepits. Detects address information (address information indicating a position on the DVD-R / W or the like where the record information is to be recorded) recorded in advance (with no record information recorded) on the DVD-R / W or the like Then, the recording position of the record information is searched based on the detected address information, and the record information is recorded.

[0003] The address information recorded by the pre-pits has a predetermined unit (for example,
ECC (Error Correction Unit)
Correcting Code (block unit) is standardized, and the entire address information can be obtained only by detecting pre-pits corresponding to all the one unit.

Further, in the above DVD-R / W, etc.,
An information track on which recording information is to be recorded is wobbled (meandering) at a constant single frequency, and the frequency of the wobbling is detected during recording of the recording information, thereby generating a recording clock signal serving as a reference at the time of recording. Recording.

According to this configuration, a DVD-
Even if the rotation of the R / W or the like deviates from the steady speed, the frequency of the recording clock signal can be shifted in accordance with the deviation, thereby having a frequency constantly synchronized with the rotation of the DVD-R / W or the like. It is possible to generate the recording clock signal and record the recording information accurately.

[0006]

However, since the single frequency in the conventional information track wobbling is a low frequency of, for example, about 140 kilohertz, the recording clock signal having a higher precision than the recording density at the time of recording. There was a problem that there was a case that could not be generated.

[0007] In addition, since address information is recorded in advance only by using pre-pits, there is a problem that the amount of information is limited.

Furthermore, since address information cannot be obtained unless a prepit corresponding to a predetermined unit is detected, such as the ECC block, high-speed address search is performed and recording information is recorded at high speed. There was also a problem that it was not possible.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has as its object the problem of recording information based on a recording clock signal having high accuracy and high reliability at the time of recording the recording information. It is possible to record and
An information recording medium capable of acquiring more address information accurately in a shorter time, a medium manufacturing apparatus for manufacturing the information recording medium, and the control information from the information recording medium when recording the information. It is an object of the present invention to provide an information detecting device for detecting the information and an information recording device including the information detecting device.

[0010]

In order to solve the above-mentioned problems, the invention according to claim 1 is formed so as to be adjacent to an information track such as a groove track on which recording information is recorded. The control information used for controlling the recording of the recording information by being reproduced when recording the recording information is recorded on the adjacent track, such as a land track, which is recorded by the pre-pits. The information track having a meandering waveform corresponding to a wobbling signal obtained by multiplexing a sub-signal having a fixed sub-frequency higher than the fundamental frequency with respect to the signal.

Therefore, since the information track is formed with a meandering waveform corresponding to the wobbling signal in which the sub-signal having a higher frequency than the basic signal is multiplexed, the wobbling signal is detected at the time of recording the record information. Further, by extracting the sub-signal and generating the recording reference signal, it is possible to record the recording information based on the recording reference signal having high accuracy and high reliability.

According to a second aspect of the present invention, there is provided the information recording medium according to the first aspect, wherein the information track at a position adjacent to the prepit in the information track is provided. A meandering waveform is formed corresponding to the wobbling signal including only the basic signal.

Therefore, since the meandering waveform in the information track adjacent to the pre-pit corresponds to only the basic signal, it is possible to prevent adverse effects from the sub-signal when detecting the pre-pit when recording information.

According to a third aspect of the present invention, there is provided an information recording medium according to the first or second aspect, wherein the sub-signal is phase-modulated based on predetermined information set in advance. Have been.

Therefore, predetermined information other than the control information can be recorded in the information recording medium in advance.

According to a fourth aspect of the present invention, there is provided an information recording medium according to the third aspect, wherein the information track and the adjacent track are spirally formed on the information recording medium. A disc-shaped information recording medium, wherein the recording information is composed of a plurality of information units, and the pre-pit is one of the odd-numbered information units or the even-numbered information units of the recording information. Is formed only on the adjacent track adjacent to the information track to be recorded, and the meandering waveform corresponding to the wobbling signal including the phase-modulated sub-signal is an odd number of the recording information. Either the first information unit or the even information unit is provided only in the area on the information track where the information unit is to be recorded.

Therefore, for example, a meandering waveform corresponding to the prepit and the phase-modulated sub-signal is formed only on the adjacent track adjacent to the information track on which the even-numbered information unit is to be recorded. Thus, when recording the recording information, it is possible to prevent the detection of the pre-pits and the detection of the meandering waveform corresponding to the phase-modulated sub-signal from adversely affecting each other.

According to a fifth aspect of the present invention, there is provided an information recording medium according to the third or fourth aspect, wherein the predetermined information records the recording information together with the control information. At this time, the information is configured to be predetermined information used for controlling the recording of the recording information by being reproduced.

Therefore, in addition to the control information, predetermined information that can be used for recording control can be further carried on the information recording medium.

According to a sixth aspect of the present invention, there is provided an information recording medium according to any one of the first to fifth aspects, wherein the information recording medium is a DVD-R.
/ W, the fundamental frequency is 140 kHz, and the sub-frequency is 840 kHz.

Therefore, since the sub-frequency is six times the fundamental frequency, a sufficiently accurate and reliable recording reference signal can be obtained at the time of recording the recording information, and the sub-signal affects the modulation frequency band of the recording information. Can be prevented.

According to a seventh aspect of the present invention, there is provided a medium manufacturing apparatus for manufacturing an information recording medium according to the first aspect, wherein a ROM or the like for generating the wobbling signal is provided. Means, generating means such as a preformat encoder for generating a pre-pit signal for forming the pre-pits, and generating the wobbling signal from the generating means, and performing wobbling corresponding to the generated wobbling signal. And forming means for forming the information track and forming the adjacent track while forming the prepit based on the generated prepit signal.

Therefore, it is possible to form an information track having a meandering waveform corresponding to a wobbling signal in which a sub-signal having a higher frequency than the basic signal is multiplexed.
By detecting the wobbling signal at the time of recording the recording information on the information recording medium and extracting the sub-signal to generate the recording reference signal, the recording information is recorded based on the recording reference signal having high accuracy and high reliability. Records can be made.

In order to solve the above-mentioned problem, the invention according to claim 8 is directed to the medium manufacturing apparatus according to claim 7, wherein the information track in the information track at a position adjacent to the prepit in the information track is provided. The wobbling signal corresponding to the meandering waveform is configured to include only the basic signal.

Therefore, since the meandering waveform in the information track adjacent to the pre-pit corresponds to only the basic signal, it is possible to prevent the adverse effect from the sub-signal when detecting the pre-pit at the time of recording the record information.

According to a ninth aspect of the present invention, there is provided a medium manufacturing apparatus according to the seventh or eighth aspect, wherein the sub-signal is phase-modulated based on predetermined information set in advance. Have been.

Therefore, predetermined information other than the control information can be recorded in the information recording medium in advance.

[0028] In order to solve the above-mentioned problem, a tenth aspect is provided.
The information recording medium according to claim 9, wherein the information recording medium is a disc-shaped information recording medium in which the information track and the adjacent track are spirally formed, and the recording information is a plurality of pieces. The adjacent track adjacent to the information track on which one of the odd-numbered information unit or the even-numbered information unit of the recording information is to be recorded. While forming the pre-pit only on the top,
A meandering waveform corresponding to the wobbling signal including the phase-modulated sub-signal is formed on the information track on which one of the odd-numbered information unit or the even-numbered information unit of the recording information is to be recorded. It is configured to be provided only in the region of.

Accordingly, for example, the meandering waveform corresponding to the prepit and the phase-modulated sub-signal is formed only on the adjacent track adjacent to the information track on which the even-numbered information unit is to be recorded. When recording the recording information, it is possible to prevent the detection of the pre-pit and the detection of the meandering waveform corresponding to the phase-modulated sub-signal from adversely affecting each other.

[0030] In order to solve the above-mentioned problems, the present invention is directed to claim 11.
In the medium manufacturing apparatus according to the ninth or tenth aspect, the predetermined information is reproduced when the recording information is recorded together with the control information, thereby controlling the recording of the recording information. It is configured to be predetermined information to be used.

Therefore, in addition to the control information, predetermined information that can be used for controlling the recording can be further carried on the information recording medium.

[0032] In order to solve the above-mentioned problems, a twelfth aspect of the present invention is described.
The medium described in any one of claims 7 to 11, wherein the information recording medium is a DVD.
R / W, the fundamental frequency is 140 kHz, and the sub-frequency is 840 kHz.

Therefore, since the sub-frequency is six times the fundamental frequency, a sufficiently accurate and reliable recording reference signal can be obtained at the time of recording the recording information, and the sub-signal affects the modulation frequency band of the recording information. Can be prevented.

[0034] In order to solve the above-mentioned problems, a thirteenth aspect is provided.
The recording device according to claim 1, wherein when the recording information is recorded on the information track, a detection unit such as a pickup for detecting the wobbling signal and the pre-pit from the information recording medium according to claim 1; Extracting means such as a trap circuit for extracting the sub-signal from the wobbling signal; generating means such as a PLL unit for generating a recording reference signal for recording the recording information based on the extracted sub-signal; And reproducing means such as a pre-pit decoder for reproducing the control information based on the pre-pits.

Therefore, an information track is formed having a meandering waveform corresponding to a wobbling signal in which a sub-signal having a higher frequency than the basic signal is multiplexed, and the wobbling signal is detected and the sub-signal is extracted. Therefore, the recording information can be recorded based on the recording reference signal having high accuracy and high reliability.

In order to solve the above-mentioned problems, the present invention is directed to claim 14.
In the information detection device according to claim 13, the meandering waveform in the information track at a position adjacent to the prepit in the information track is:
It is formed corresponding to the wobbling signal including only the basic signal.

Therefore, since the meandering waveform in the information track adjacent to the pre-pit corresponds to only the basic signal, it is possible to prevent adverse effects from the sub-signal when detecting the pre-pit.

[0038] In order to solve the above-mentioned problems, the present invention is applied to claim 15.
In the information detection device according to claim 13 or 14, the sub-signal is phase-modulated based on predetermined information set in advance, and the predetermined signal is obtained from the detected wobbling signal. The information processing apparatus further includes second extraction means for extracting information.

Therefore, predetermined information other than the control information can be obtained from the information recording medium.

[0040] To solve the above-mentioned problems, the present invention is applied to claim 16.
The information detection device according to claim 15, wherein the information recording medium is a disc-shaped information recording medium in which the information tracks and the adjacent tracks are spirally formed, and the recorded information is a plurality of pieces. And the pre-pits are adjacent tracks adjacent to the information track on which one of the odd-numbered information units or the even-numbered information units of the recording information is to be recorded. The meandering waveform corresponding to the wobbling signal including only the phase-modulated sub signal is formed only on the odd-numbered information unit or the even-numbered information unit of the recording information. Are provided only in the area on the information track to be recorded.

Therefore, for example, a pre-pit formed only on an adjacent track adjacent to an information track on which an even-numbered information unit is to be recorded and a meandering waveform corresponding to a phase-modulated sub-signal are detected. Thus, it is possible to prevent the detection of the pre-pit and the detection of the meandering waveform corresponding to the phase-modulated sub-signal from adversely affecting each other.

In order to solve the above-mentioned problems, a seventeenth aspect is provided.
In the information detection device according to claim 15 or 16, the predetermined information is reproduced when the recording information is recorded together with the control information, thereby controlling the recording of the recording information. The information processing apparatus further includes second reproducing means such as a phase modulation decoder for reproducing the extracted predetermined information as well as the predetermined information to be used.

Accordingly, it is possible to further obtain, from the information recording medium, predetermined information that can be used for recording control in addition to the control information.

In order to solve the above-mentioned problem, the present invention provides an image forming apparatus.
The information detection device according to any one of claims 13 to 17, wherein the information recording medium is a DV device.
D / R / W, the fundamental frequency is 140 kHz, and the sub-frequency is 840 kHz.

Therefore, since the sub-frequency is six times the fundamental frequency, a sufficiently accurate and reliable recording reference signal can be obtained, and the sub-signal can be prevented from affecting the modulation frequency band of the recording information. .

In order to solve the above-mentioned problems, a nineteenth aspect is provided.
The information detection device according to any one of claims 13 to 18, and the reproduced control information or at least one of the reproduced predetermined information and the generated Recording means such as a pickup for recording the recording information on the information track based on the recording reference signal.

Therefore, since the recording information is recorded based on the recording reference signal obtained by extracting the sub-signal having the high frequency, the recording information can be recorded more accurately, and the predetermined information other than the control information is used. The recording information can be recorded efficiently and more accurately.

[0048]

Next, a preferred embodiment of the present invention will be described with reference to the drawings.

In the embodiment described below, the DVD-R as an information recording medium on which recording information is to be recorded is described.
/ W address information indicating a position on the / W is recorded in the form of pre-pits as pre-information, and the DVD-R / W
Recording operation of recording information for the DVD-R / W
Control of rotation speed of ), And a cutting device as a medium manufacturing device for manufacturing a DVD-R / W in which a low-frequency signal serving as a reference for generating the recording clock signal is recorded in advance. This is an embodiment in which the present invention is applied to an information recording device for recording necessary recording information for R / W. (I) Embodiment of DVD-R / W First, prepits corresponding to the preinformation are formed in advance, and a groove track to be described later is wobbled at a multiplex frequency shown below to thereby obtain the low frequency signal and a later described description. DVD with high frequency signal recorded
An embodiment of the R / W will be described with reference to FIGS.

FIG. 1A shows a DVD-R of the embodiment.
/ W is a perspective view showing the structure of / W (for the sake of clarity, the description of wobbling corresponding to a high-frequency signal, which will be described later, is omitted, and only the wobbling corresponding to a low-frequency signal is described). FIG. 1B is a cross-sectional view of the groove track viewed from the direction of the arrow in the perspective view.
FIG. 3 is a schematic diagram showing a recording format of pre-information and the low-frequency signal and the high-frequency signal recorded in advance on a DVD-R / W, and FIG. 3 is a schematic diagram further explaining the recording format.

First, the DVD-ROM of this embodiment will be described with reference to FIG.
The physical structure of R / W will be described.

In FIGS. 1A and 1B, the DVD-
R / W1 is a phase-change DVD-R / W having a recording layer 11 made of a phase-change thin film and capable of writing information a plurality of times, and a groove track as an information track on which information is to be recorded. 2 and the groove track 2
A land track 3 as an adjacent track for guiding a light beam B such as a laser beam as a reproduction light or a recording light is formed on the substrate 9 so as to be adjacent to each other.

In each groove track 2,
In particular, as shown in FIG. 1B, protective layers 5 and 8 having a function of protecting the recording layer 11 so as to sandwich the recording layer 11 therebetween.
A reflective layer 6 for reflecting the light beam B when reproducing recorded information, a recording layer 11, protective layers 5 and 8,
Further, a resin layer 9A and a protective film 7 for further protecting the reflection layer 6 from the outside air and the like are formed by being laminated on the substrate 9, respectively.

On the other hand, pre-pits 4 corresponding to the pre-information are formed on the land track 3. The pre-pits 4 are formed before shipping the DVD-R / W1.

Further, in the DVD-R / W1,
The groove track 2 is used to generate the recording clock signal, and the low frequency (specifically, 140 kHz) is used.
The above-mentioned high-frequency (specifically, 840 kHz) signal (hereinafter, referred to as a sub-frequency signal) used for recording address information to be described later with respect to a signal (hereinafter, this signal is referred to as a fundamental frequency signal). ) Is wobbled so as to correspond to the multiplexed frequency signal. At this time, the recording of the basic frequency signal for generating the recording clock signal by the wobble corresponding to the basic frequency signal among the wobbles (meandering waveform) in the groove track 2 and the wobble corresponding to the sub-frequency signal among the wobbles will be described later. The recording of such address information is performed before the DVD-R / W1 is shipped, as in the case of the pre-pit 4.

When recording information (information such as image information to be originally recorded other than pre-information and a synchronizing signal; the same applies hereinafter) is recorded on the DVD-R / W1, an information recording apparatus to be described later is used. By detecting the fundamental frequency signal contained in the multiplexed frequency signal in the wobble of the group track 2 separately from the sub-frequency signal, the recording clock signal is obtained and the overall recording operation of the DVD-R / W1 is controlled. .

On the other hand, similarly, pre-information is obtained in advance by detecting the pre-pits 4 in the information recording apparatus, and based on the pre-information, the optimum output of the optical beam B as a recording light is set, and further, the recording information is set. DVD to record
-Acquire address information or the like, which is a position on R / W1, and record information is recorded at a corresponding recording position based on the address information.

The address information is also obtained by decoding the separately detected sub-frequency signal as described later.

At the time of recording information, the light beam B is irradiated so that the center thereof coincides with the center of the groove track 2 to form phase change pits corresponding to the recording information on the groove track 2. Form record information.

At this time, the size of the light spot SP is as shown in FIG.
As shown in (a), it is set so that a part thereof is irradiated not only on the groove track 2 but also on the land track 3. Then, the push-pull method (D) is performed using reflected light of a part of the light spot SP applied to the land track 3.
The pre-information is detected from the pre-pits 4 by the radial push-pull method using a photodetector divided by a division line parallel to the rotation direction of the VD-R / W1, and the pre-information is obtained, and the groove track 2 is obtained. The multi-frequency signal is detected from the groove track 2 by using the reflected light of the light spot SP irradiated to the recording spot SP, and the generation of the recording clock signal or the acquisition of the address information is executed.

Next, the pre-information and the recording format of the multiplex frequency signal recorded in advance on the DVD-R / W1 of this embodiment will be described with reference to FIG.

In FIG. 2, the upper part shows the recording format of the recording information, and the lower part shows the wobbling state of the groove track 2 for recording the recording information (ie, the plan view of the groove track 2). And the arrow indicating the wobbling state of the groove track 2 indicates the pre-pit 4
Are schematically shown at the positions where are formed.

Here, in FIG. 2, the wobbling state of the groove track 2 is shown by using an amplitude larger than the actual amplitude for easy understanding, and the recorded information is shifted on the center line of the groove track 2. A change pit is formed and recorded.

As shown in FIG. 2, in this embodiment, D
The recording information recorded in the VD-R / W1 is divided in advance for each sync frame as an information unit. And
One recording sector is formed by 26 sync frames, and one E, which will be described later, forms the minimum unit of error correction during reproduction by 16 recording sectors.
A CC block is formed.

Note that one sync frame has a unit length (hereinafter, referred to as T) 1 corresponding to a bit interval defined by a recording format when recording the recording information.
It has a length of 488 times (1488T), and furthermore, synchronization information SY for synchronizing at the time of recording for each sync frame is added to the first 14T length portion of one sync frame.
Is recorded.

On the other hand, in this embodiment, the DVD-R / W
The pre-information recorded in No. 1 is recorded for each sync frame. Here, in the recording of the pre-information by the pre-pits 4, the synchronization signal of the pre-information (hereinafter referred to as the synchronization signal) is recorded on the land track 3 adjacent to the area where the synchronization information SY in each sync frame in the recording information is recorded. One pre-pit 4 is always formed to indicate the sync code, and the contents of the pre-information (not the synchronization information SY) to be recorded on the land track 3 adjacent to the first half in the sync frame. Address information) as two or one pre-pits 4
(Note that the pre-pit 4 may not be formed in the first half of the sync frame other than the synchronization information SY depending on the content of the pre-information to be recorded. Also, the first sync sector of one recording sector may be formed. In the frame, three pre-pits 4 are always formed continuously in the first half thereof.)

At this time, in this embodiment, in one recording sector, only even-numbered sync frames (hereinafter, referred to as EVEN frames) or only odd-numbered sync frames (hereinafter, referred to as ODD frames) are provided. Pre-pits 4 are formed on one of them, and pre-information is recorded. That is, in FIG. 2, when the pre-pit 4 is formed in the EVEN frame (indicated by the solid line upward arrow in FIG. 2), the pre-pit 4 is not formed in the ODD frame adjacent thereto.

Here, the reason why the pre-pits 4 are formed only in the EVEN frame or the ODD frame as described above is, for example, when all the pre-pits 4 are formed over the entire sync frame of the DVD-R / W1. DV
Due to the fact that the DR / W1 is controlled to rotate at a constant linear velocity, a prepit 4 may be formed at the same position on the land tracks 3 on both sides of one groove track 2. . In this case, the pre-pits 4 (carrying different pre-information) on different land tracks 3 are simultaneously included in the range of the light spot SP. At this time, different pre-information is detected at the same time, so that both pre-pits are detected at the same time. Pre-information cannot be read accurately. Therefore, in DVD-R / W1, usually, EVE
The pre-pits 4 are formed only in the area corresponding to the N frame, and the ODD is formed only when there is a possibility that the pre-pits 4 will be formed at the same position on the land tracks 3 on both sides of one groove track 2 in that state. The pre-pits 4 are formed in the area corresponding to the frame.

The data structure of the pre-information (including the address information on the DVD-R / W1) recorded by the pre-pits 4 is such that the pre-pits 4 are formed only every other sync frame as described above. In addition, a data structure is adopted in which address information on the DVD-R / W1 can be obtained by detecting and decoding all pre-information corresponding to the one ECC block.

Next, regarding the relationship between the wobble of the groove track 2 and the position of the pre-pit 4, the pre-pit 4 is formed at the position of the maximum amplitude in the wobbling.

At this time, the relationship between the contents of the pre-information in the pre-pits 4 and the positions where the pre-pits are formed will be described more specifically. The pre-pits formed on the land track 3 adjacent to the area where the synchronization information SY is recorded are described. 4 is “pre-pit B2”, and the pre-pits 4 formed on the land track 3 adjacent to the first half of the sync frame other than the synchronization information SY are “pre-pit B1” and “pre-pit B0” from the beginning. As shown in Table 1, EVEN at the beginning of one recording sector
All of the pre-pits B2 to B0 are formed at the location corresponding to the sync code in the frame, and only the pre-pits B2 and B1 are formed at the location corresponding to the sync code in the ODD frame. Only the pre-pits B2 and B0 are formed at the location corresponding to the data "1", and only the pre-pit B2 is formed at the location corresponding to the data "0" as pre-information other than the sync code.

[0072]

[Table 1] On the other hand, the groove track 2 has a fundamental frequency signal of 840 kHz (that is, one wave at the fundamental frequency) having a fundamental frequency of 140 kHz (a frequency corresponding to eight waves of one sync frame) over all the sync frames. The sub-frequency signal having the above-mentioned sub-frequency (a frequency including six waves in it) is wobbled at a multiplexed frequency.

Further, the sub frequency signal is
(When the pre-pit 4 is formed in the EVEN frame and in the ODD frame)
Is formed. ) Are not multiplexed with the fundamental frequency signal, and are phase-modulated based on address information recorded using the sub-frequency signal as described later.

In the information recording apparatus described later, the recording clock signal for controlling the entire recording operation of the DVD-R / W1 is generated by detecting the fundamental frequency, and the sub-frequency signal is detected. By doing so, the address information is obtained.

Next, the wobble mode of the groove track will be described in more detail with reference to FIG.

The upper part of FIG. 3 is a diagram showing the formation position of the pre-pits 4 from the top and the sub-frequency signal and the fundamental frequency signal actually multiplexed, respectively, and the lower part of FIG. FIG. 4 is a waveform correspondence diagram showing a relationship (in the embodiment, there are three types) between a mode of phase modulation and address information recorded by the phase modulation.

In the upper part of FIG. 3, one square in each of the figures showing the sub-frequency signal and the fundamental frequency signal indicates one wave (one cycle) of each signal.

As shown in the upper part of FIG. 3, the pre-pits 4 are usually formed only in the EVEN frame.

The sub-frequency signal is not multiplexed with the fundamental frequency signal at the positions where the pre-pits 4 are actually formed and at the positions where the pre-pits 4 are likely to be formed in both the EVEN frame and the ODD frame. Also, six waves of the sub-frequency signal correspond to one wave of the fundamental frequency signal.

Further, with respect to the fundamental frequency signal, eight waves thereof correspond to one sync frame.

Next, address information recorded by phase modulation of the sub-frequency signal will be described with reference to the lower part of FIG. 3. First, when a sync code in address information is recorded, as shown in the lower left part of FIG. The groove track 2 is wobbled by inverting the phase of only the first three waves of the six sub-frequency signals corresponding to one wave of the fundamental frequency signal.

The data "1" in the address information
3, the phase of only the first wave, the fourth wave and the fifth wave of the six sub-frequency signals is inverted, and the groove track 2 is wobbled, as shown in the lower right of FIG. .

Further, data "0" in the address information
In the case where is recorded, the groove track 2 is wobbled by inverting the phase of only the first wave and the sixth wave of the six sub-frequency signals, as shown in the lower part of FIG.

Here, of the sub-frequency signals, those which are phase-modulated for recording address information are located at positions corresponding to the first three waves of the basic frequency signal in one sync frame (ie, the pre-pit 4 is formed). (Positions that may be present) except for the positions corresponding to the fourth to eighth waves.

At this time, as shown in the lower part of FIG. 3, when address information is recorded by phase-modulating the sub-frequency signal,
Since a maximum of 13 bits of address information can be recorded in one recording sector, unlike the case of the pre-information described above, for example, the DV information can be obtained by detecting address information corresponding to four recording sectors and then decoding it.
A data structure that can acquire address information (so-called absolute address information) on the DR / W1 can be adopted.

As described above, in one recording sector, only the EVEN frame or the ODD frame is used.
Corresponding to the formation of the prepits 4 in only one of the frames, the portion where the sub-frequency signal is phase-modulated is also located on the inner side of the DVD-R / W1 in the radial direction. If there is a possibility of approaching the position of the pre-pit 4 corresponding to the groove track 2, the other non-adjacent sync frame (EVEN)
The portion is formed on either the frame or the ODD frame). That is, in one recording sector, a portion in which the sub-frequency signal is phase-modulated is formed in either the EVEN frame only or the ODD frame only.

Accordingly, in FIG. 3, when a wobble including a sub-frequency signal that has been phase-modulated is formed in the EVEN frame, the wobble is not formed in the ODD frame adjacent thereto.

Further, the sync frame corresponding to the position where the pre-pit 4 is formed does not always coincide with the sync frame in which the sub-frequency signal is phase-modulated.

With the above configuration, when detecting the address information recorded by phase-modulating the sub-frequency signal, the adverse effect from the pre-pit 4 can be eliminated.

Further, the pre-pits 4 described above make the DVD
-DVD-ROM by address modulation in pre-information recorded on R / W1 and phase modulation of the sub-frequency signal.
Regarding the relationship with the address information recorded in the R / W1, for example, the same address information is superimposed and carried on the phase modulation of the pre-pit 4 and the sub-frequency signal in order to improve the reliability in reproducing the address information. Alternatively, address information that is hierarchically different from each other may be separately carried.

(II) Embodiment of Cutting Apparatus Next, the present embodiment for forming the prepits 4 and the groove tracks 2 shown in FIGS. 2 and 3 in the form shown in FIGS. The cutting device according to the embodiment will be described with reference to FIGS. 4 and 5.

FIG. 4 is a block diagram showing the overall configuration of the cutting apparatus according to the embodiment, and FIG. 5 is a block diagram showing the configuration of a preformat encoder.

The cutting device shown in FIGS. 4 and 5 is used for mass-producing a DVD-R / W1 in which pre-pits 4 and wobbled groove tracks 2 are formed and pre-information and address information are recorded according to the present invention. For producing a stamper disk.

First, the overall configuration and operation of the cutting device will be described with reference to FIG.

As shown in FIG. 3, the cutting device C of the embodiment comprises a data generator 20, a parallel / serial converter 21, a preformat encoder 22 as a generating means, a clock signal generator 23, A laser generator 24 as forming means, an optical modulator 25 as forming means, an objective lens 26, and a spindle motor 29
, A rotation detector 30, a rotation servo circuit 31, a feed unit 32, a position detector 33, and a feed servo circuit 34.
, An electromagnet 35, and a permanent magnet 36.

Further, the laser generator 24 outputs the light beam L
An emission device 24 _G for emitting _G, constituted by the emitting device 24 _L for emitting a light beam L _L.

Further, the stamper disk includes a glass substrate 27 as a stamper disk main body, a prepit 4 coated on the glass substrate, and a resist (photosensitive material) 28 for forming each track.

Next, the operation will be described.

First, the data generating section 20 performs a DVD-R /
Pre-information _SPP including address information to be recorded in W1 is generated and output to the parallel / serial converter 21.

Then, the parallel / serial converter 21
Converts the generated pre-information S _PP from parallel to serial and outputs it to the pre-format encoder 22.

Thus, based on the serialized pre-information S _PP , the pre-format encoder 22 generates the recording pre-information S _R for forming the pre-pit 4 and the groove track 2 in the recording format shown in FIGS.
And generates and outputs to the optical modulator 25, and outputs to the electromagnet 35 generates a wobbling signal S _W described later.

At this time, the clock signal generator 23 generates the clock signal CLK used for pre-formatting.
(The period is set to the above T.) and outputs it to the preformat encoder 22.

On the other hand, the laser generator 24 is a DVD-R
A light beam L _G for forming the groove track 2 shown in FIG. 1 while wobbling the substrate W / W1 is emitted, and a light beam L _L for forming the land track 3 and the pre-pit 4 shown in FIG. Inject

[0104] The optical modulator 25 is intensity modulated to each injection based on the light beams emitted L _L or L _G recording pre-information S _R.

[0105] Then, the light beam L _G and L _L emitted from the light modulator 25 is focused on the stamper disc by the objective lens 26.

Next, in parallel with these operations, the spindle motor 29 rotates the stamper disk.

Then, the rotation number of the stamper disk is detected by the rotation detector 30, and based on the detected rotation number, the rotation of the stamper disk is servo-controlled by the rotation servo circuit 31 and one rotation of the stamper disk. A one-rotation detection signal S _S generated only once is generated and output to the preformat encoder 22.

Further, in order to form spiral groove tracks 2 and land tracks 3 on the stamper disk, the feed unit 32 applies the spindle motor 29 and the stamper disk to the stamper disk in accordance with the rotation of the stamper disk. Move radially.

At this time, the position of the feed unit 32 in the radial direction is detected by the position detector 33, and the movement of the feed unit 32 is servo-controlled by the feed servo circuit 34 based on the detected position of the feed unit 32.

[0110] On the other hand, the electromagnet 35 is based on the wobbling signal S _W by vibrating the light beam L _G in the radial direction of the stamper disc, to form a groove track 2 wobbled at multiple frequencies mentioned above.

At this time, the permanent magnet 36 fixed to the optical modulator 25 causes the optical modulator 25 to actually vibrate in the radial direction of the stamper disk due to the magnetic interaction with the electromagnet 35, thereby causing the light beam L _G By oscillating the irradiation position, groove tracks 2 to be wobbled in the above-described manner are formed.

Here, the light beam L _L is modulated by the light modulator 25 based on the recording pre-information S _R , but the light beam L _G is always kept at a constant intensity by a DC (direct current) driving device (not shown). The stamper disk is irradiated while being vibrated in the radial direction of the stamper disk.

[0113] Further, the light beam L _G to form a light beam L _L and the groove track 2 to form the land track 3,
Irradiation is performed while the irradiation position is shifted in the radial direction of the stamper disk, and concentric spiral land tracks 3 and groove tracks 2 are simultaneously formed.

Next, the preformat encoder 22
Will be described with reference to FIG.

As shown in FIG. 5, the preformat encoder 22 includes a frame signal generator 40, an ODD
A gate signal generator 41 for EVEN determination;
, A switch 43, a recording pre-information generator 44, a counter 45, and a ROM (Read Only Me
mory) 46 and a D / A converter 47.

Next, the operation will be described.

First, in the configuration shown in FIG. 5, the switch 43 is normally switched to the even-number recording pre-information _SRE .

The frame signal generator 40 to which the clock signal CLK has been input corresponds to the EVEN frame at the timing corresponding to each sync frame shown in FIGS. 2 and 3 based on the clock signal CLK. An EVEN frame signal S _E and an ODD frame signal S _O corresponding to an ODD frame are respectively output, and an EV (not shown) that is reset each time an EVEN frame signal S _E corresponding to one EVEN frame is generated.
Outputs EVEN frame count signal S _EC outputted from the EN frame counter, and further outputs the first frame signal S _H indicating the beginning of the recording sector of each.

The ODD / EVEN determination gate signal generator 41 generates a pre-pit for recording in a period corresponding to one round on the stamper disk, based on the clock signal CLK, the one-rotation detection signal S _S and the EVEN frame count signal S _EC. 4 is the sync frame to be formed
And outputs the gate signal S _G for one of the discrimination and or ODD frame is EN frame.

[0120] These, determiner 42, EVEN frame signal S _E, the gate signal S _G and one rotation detection signal S _S
Based on the outputs the judgment signal S _J to determine whether to or ODD frame and EVEN frame sync frame to form the pre-pit 4.

Further, the recording pre-information generator 44 responds to the EVEN frame in the recording information based on the top frame signal S _H , the EVEN frame signal S _E , the ODD frame signal S _O , the clock signal CLK and the pre-information S _PP. Record pre-information S _RE for forming pre-pit 4
And outputs the odd recording pre-information S _RO for forming a pre-pit 4 corresponding to the ODD frame in the recording information.

[0122] Then, the switch 43 based on the determination signal S _J, and outputs an even record pre-information S _RE or odd recording pre-information S _RO selectively switched.

[0123] On the other hand, the counter 45 counts the number of clocks included in an initialized while the clock signal CLK by using the EVEN frame signal S _E as an initialization signal, the count every time the head of the number of clocks sync frame and outputs a signal S _C.

Then, the ROM 46 stores the count signal S _C
And based on the pre-information S _PP, and outputs the wobbling signal S _W previously stored for wobbling wobble having multiple frequencies indicating the groove track 2 in FIG. 2 and FIG. 3 (a digital signal).

[0125] Thus, D / A converter 47 converts the outputted wobbling signal S _W wobbling signal S _W is an analog signal for vibrating the optical modulator 25 outputs to the electromagnet 35.

Here, among the pre-format encoders 22, the frame signal generator 40, ODD / EV
For details of the configurations and operations of the EN determination gate signal generator 41, the determination unit 42, and the recording pre-information generator 44,
For example, Japanese Patent Application No. Hei 8-8 filed earlier by the applicant of the present application.
The contents described in paragraphs [0067] to [0090] in the specification of No. 310941 can be applied as they are.

[0127] Then, the counter 45 according to the present invention for generating the wobbling signal S _W, ROM 46 and D
The operation of the / A converter 47 will be described in detail with reference to FIGS.

First, the counter 45 detects the input E
The VEN frame signal S _E as an initialization signal, the EV
The number of clocks of the clock signal CLK is counted while being initialized each time the EN frame signal S _E is input, and the count value is output as the count signal S _C.

The count signal S_CAnd pre-condition
Report S_PPIs used as the address data for the ROM 46.
The ROM 46 stores the count signal.
No. S _CAnd pre-information S_PPIs set in advance according to the content of
The output stored in a table in the ROM 46 is stored.
Wobbling signal S_WOutput as

Here, in the present embodiment, the wobbling frequency of the groove track 2 is set so as to make the wobble as shown in the lower part of FIG. 3 according to the type of address information recorded by the sub-frequency signal. table for outputting the S _W is stored in the ROM 46, and outputs the contents of the table as wobbling signal S _W based on the count signal S _C and the pre-information S _PP.

The specific storage of the ROM 46
For example, the pre-information S _PPAd to record
Significant Bit (MSB) in address information
And the count signal S_CIn the address information
Used as digits other than B (2SB, 3SB ... LSB)
3 for each predetermined address in the ROM 46.
The data corresponding to the indicated wobble is stored and input.
Pre-information S_PPAnd the counter signal S_CBased on these
Of the wobbling signal S_WRead as
I should do it.

More specifically, for example, when address information to be recorded is "0" and a sub-frequency signal indicating the address information is multiplexed with the fourth fundamental frequency signal shown in the upper part of FIG. Is the timing at which the fourth fundamental frequency signal starts, "558 ((1
When a 488/8) × 3) ", the corresponding outputs a count signal S _C, the count signal S _C wobbling signal data corresponding to the wobbles shown in FIG. 3 in the lower part from the output timing S Read and output as _W.

On the other hand, when the address information to be recorded is "1" and the sub-frequency signal indicating the address information is similarly multiplexed with the fourth fundamental frequency signal shown in the upper part of FIG.
When the count value of 5 is set to "558", the corresponding outputs a count signal S _C, the count signal S _C wobbling signal data corresponding to wobble as shown in Figure 3 the lower right output timing S Read and output as _W.

Similarly, when the address information to be recorded is a sync code, and the sub-frequency signal indicating the sync code is multiplexed with the fourth fundamental frequency signal shown in the upper part of FIG. 3, the count value of the counter 45 becomes "558". when it becomes a "and outputs a corresponding count signal S _C, reads and outputs data corresponding to the wobbles shown from the count signal S _C is output timing in FIG. 3 lower left as a wobbling signal S _W.

[0135] After this, the wobbling signal S _W is D /
A converter 47 is converted into an analog signal, by the operation of the electromagnet 35 and the permanent magnet 36 based on the wobbling signal S _W which has been converted into the analog signal, the optical modulator 25 is moved in the radial direction of the stamper disc (vibration) As a result, a groove track 2 wobbled at a desired multiplex frequency is formed.

By the operation of the preformat encoder 22 described above, the wobbling signal for forming the groove track 2 on the stamper disk by the wobbles shown in FIGS. 2 and 3 carrying the address information by the sub-frequency signal. _SW is generated.

(III) Embodiment of Information Recording Apparatus Next, an embodiment of an information recording apparatus according to the present invention for recording recording information on the DVD-R / W1 having the above-described configuration will be described with reference to FIGS. This will be described with reference to FIG.

First, a configuration of the information recording apparatus according to the embodiment will be described with reference to FIGS.

FIG. 6 is a block diagram showing the overall configuration of the information recording apparatus according to the embodiment, and FIG. 7 is a block diagram showing the detailed configuration of the information recording apparatus.

As shown in FIG. 6, the information recording apparatus S of the embodiment comprises a pickup 5 as a detecting means and a recording means.
0, driver 51, strategy circuit 52, DVD
An encoder 53, a band-pass filter 54, a trap circuit 55 as an extracting unit, and a pre-pit detection unit 56
A phase comparison unit 57, a phase shifter 58, a pre-pit decoder 59 as a reproducing unit, a phase modulation decoder 60 as a second reproducing unit, and a PLL as a generating unit.
(Phase Locked Loop) unit 61, a spindle control unit 62, a CPU 63, a spindle motor 64, a first
Wobble PLL unit WP1 and second wobble PLL unit WP
And 2.

Further, the first wobble PLL unit WP1 and the second wobble PLL unit WP2 have basically the same configuration. Specifically, as shown in FIG. 65, 66, and 80, a phase comparator 67, an equalizer 68, and a VCO (Voltage Controlled Oscillator)
69.

Further, the spindle controller SP includes a reference signal generator 70, frequency dividers 71 and 72, a phase comparator 73
, An equalizer 74, and a spindle servo unit 75.

Next, the operation of the information recording apparatus S will be described with reference to FIGS.

The recording data Sr as recording information to be recorded on the DVD-R / W1 is input from the outside, and is 8/16 modulated by the DVD encoder 15 based on a recording clock signal Swc described later and a control signal Sct described later. ,
It is output to the strategy circuit 16 as a modulation signal Sec.

Then, in the strategy circuit 16, the DVD-R / R
The waveform is converted to adjust the shape of the recording pit formed on W1 and is output to the driver 51 as a recording signal Stt.

Then, the driver 51 records the recording signal S
tt is amplified to generate an amplified recording signal Sdp, which is output to the pickup 50.

After that, the pickup 50 converts the light beam B, which has been intensity-modulated by the amplified recording signal Sdp, into the recording data S.
DVD-R / W1 to form a recording pit corresponding to r
The recording is performed by irradiating the upper groove track 2.

On the other hand, the pickup 50 stores the recording data S
Prior to the formation of the recording pit corresponding to r, the DVD-R / W1 is irradiated with a light beam B (see FIG. 1), and the reflected light of the light beam B modulated by the wobble of the pre-pit 4 and the groove track 2 is reflected. Upon receiving the light, it generates a detection signal Sp including information on the wobbling of the pre-pit 4 and the groove track 2, and outputs it to the pre-pit detection unit 56, the band-pass filter 54 and the trap circuit 55.

At this time, the detection signal Sp has a multiplex frequency (140 kHz + 840 kHz) corresponding to the wobbling of the groove track 2 and has an impulse-like waveform at the timing when the pre-pit 4 is formed (see FIG. 3). (See reference numeral 4).

Next, a band-pass filter 54 having a characteristic of passing only a signal of 140 kHz passes from the detection signal Sp to the fundamental frequency (1
The wobble detection signal Swp1 corresponding to 40 kHz is extracted and output to the frequency divider 30 in the first wobble PLL unit WP1.

Then, the first wobble PLL unit WP1
Based on the wobble detection signal Swp1, a clock signal Scl synchronized with the fundamental frequency signal in the wobble of the groove track 2 and having a frequency corresponding to the reciprocal of the above T, and synchronized with the fundamental frequency signal and similar to the fundamental frequency signal Signal Swcl having a frequency of
And generate The clock signal Scl is output to the pre-pit detection unit 56, the phase shifter 58, and the pre-pit decoder 59, and the clock signal Swcl is output to the pre-pit detection unit 56, the phase comparison unit 57, the phase shifter 58, the pre-pit decoder 59, and the spindle control unit. It outputs to the frequency divider 71 in SP, respectively.

For this reason, in the first wobble PLL unit WP1, as shown in FIG. 7A, the clock signal Swcl obtained by dividing the clock signal Scl by the dividing cycle 80 is further divided by a frequency divider. The signal obtained by frequency division by 66 and the signal obtained by frequency dividing the wobble detection signal Swp1 by frequency divider 65 are compared in phase by a phase comparator 67, and the comparison result is subjected to VCO using a signal frequency-corrected by an equalizer 68.
69 to generate the clock signal Scl.

On the other hand, the trap circuit 55 having a characteristic of blocking a 140 kHz signal converts the detection signal Sp into a signal obtained by removing the fundamental frequency signal (140 kHz) in the groove track 2 (the sub-frequency signal (840 kHz)). A corresponding wobble detection signal Swp2 carrying address information is generated by the phase modulation, and is output to the second wobble PLL unit WP2 and the phase modulation decoder 60.

Thus, the second wobble PLL unit WP2
Generates a clock signal Sap synchronized with the sub-frequency signal in the wobble of the groove track 2 and having the same frequency based on the wobble detection signal Swp2, and outputs the clock signal Sap to the phase modulation decoder 60.

For this reason, the second wobble PLL unit WP2 generates the clock signal Sap with substantially the same configuration and operation as the first wobble PLL unit WP1.

On the other hand, the spindle control unit SP to which the clock signal Swcl is input generates a drive control signal Sdc for controlling the rotation speed of the spindle motor 19 based on the clock signal Swcl, and outputs the drive control signal Sdc to the spindle motor 64. I do.

Therefore, in the spindle control unit SP, the spindle motor 64 output from the reference signal generation unit 70
Is divided by the frequency divider 72, and the frequency division result is compared with the signal obtained by dividing the clock signal Swcl by the frequency divider 71 by the phase comparator 73. A signal obtained by correcting the resulting frequency characteristic by the equalizer 74 is input to the spindle servo unit 75, based on which the spindle servo unit 75 drives the spindle motor 19 so that the DVD-R / W1 rotates at a constant linear speed. The drive control signal Sdc for the spindle motor 6
4 is output.

Next, based on the timing indicated by the clock signal Swcl, the pre-pit detection unit 56 uses the clock signal Scl as an auxiliary while pre-pit signal Spp corresponding to the pre-pit 4 included in the detection signal Sp.
(Refer to the upper part of FIG. 3) is extracted by the radial push-pull method, and is output to the phase comparator 57 and the prepit decoder 59.

Next, the phase comparator 57 to which the pre-pit signal Spp and the clock signal Swcl are inputted compares the phases of the respective signals, generates a comparison signal Scp, and outputs it to the phase shifter 58.

The phase shifter 58 shifts the phase of the clock signal Swcl in accordance with the comparison signal Scp while using the clock signal Scl in an auxiliary manner, and
ps is generated and output to the PLL unit 61.

As a result, the PLL section 61 generates the recording clock signal Swc having the period T similarly to the clock signal Scl based on the phase shift signal Sps, and
The signal is output to the D encoder 53 and the strategy circuit 52, and is also output to necessary members in the information recording device S.

On the other hand, the pre-pit decoder 5 to which the clock signals Scl and Swcl and the pre-pit signal Spp are inputted.
9 decodes the pre-pit signal Spp based on the timing indicated by the clock signal Swcl and obtains pre-information including the address information carried as the pre-pit 4 while using the clock signal Scl as an auxiliary. , As a decoded pre-pit signal Spad.

Further, the phase modulation decoder 60 composed of, for example, a synchronous detector or the like uses the clock signal Sap as a reference clock signal, and obtains an address from information of a phase modulation portion (see the lower part of FIG. 3) included in the wobble detection signal Swp2. The information is decoded, and the decoded address signal
Output to

Then, based on the address information included in the decoded pre-pit signal Spad and the address information indicated by the decoded address signal Shad, the CPU 63 sets the recording position on the DVD-R / W1 where the recording data Sr is to be recorded. And the recording data S required for the recording position is recognized.
The control signal Sct for controlling the DVD encoder 53 so that r is recorded is generated and output to the DVD encoder 53.

In addition, the CPU 63 uses the information for setting the irradiation intensity of the light beam B in the pickup 50 other than the address information included in the decoded pre-pit signal Spad, for example. Control of the entire recording operation such as control of the pickup 50 so as to emit the beam B is performed.

As described above, the DVD-ROM of the embodiment
According to the operations of the R / W 1, the cutting device C and the information recording device S, the wobble in the groove track 2 adjacent to the pre-pit 4 corresponds to only the fundamental frequency signal. An adverse effect from the signal can be prevented.

Since the sub-frequency signal is phase-modulated based on the address information, address information other than the pre-information is also recorded on the DVD-R / W1 in advance by wobbling. , The address information can be stably detected.

Further, a groove track 2 and a land track 3 are spirally formed on the DVD-R / W1, and the pre-pit 4 records either an odd-numbered sync frame or an even-numbered sync frame. A wobble formed only on the land track 3 adjacent to the power groove track 2 and corresponding to a multi-frequency signal including a phase-modulated sub-frequency signal is recorded in either the ODD frame or the EVEN frame. Since it is provided only in the area on the groove track 2 to be recorded, the detection of the prepit 4 and the detection of the wobble corresponding to the phase-modulated sub-frequency signal have an adverse effect on each other when recording the recording data Sr. It can be prevented from fitting.

In the example of the information recording apparatus S shown in FIG. 6, the fundamental frequency signal is extracted from the wobble of the groove track 2 and the recording clock signal Swc is generated therefrom. 2 wobbles P
Using the sub-frequency signal extracted by the LL unit WP2,
Phase comparison unit 57, phase shifter 58, and PLL unit 61
To generate a recording clock signal.

In this case, since the fundamental frequency is 140 kHz and the sub-frequency is 840 kHz, the sub-frequency is six times the fundamental frequency, and the recording clock signal having sufficiently high accuracy and reliability is obtained. Swc is obtained at the time of recording the recording data Sr, and the sub-frequency signal can be prevented from affecting the modulation frequency band of the recording data Sr.

At this time, the frequency of the sub-frequency signal is not limited to 840 kHz in the above-described embodiment, but may be any frequency that is an integer multiple of two or more with respect to the frequency of the fundamental frequency signal. , A frequency higher than the fundamental frequency signal.

In this case, a sub-frequency signal having a frequency higher than the basic frequency is extracted to generate a recording clock signal. Therefore, a frequency higher than the recording clock signal Swc generated based on the basic frequency signal is obtained. Is obtained, and the recording data Sr can be recorded based on the recording clock signal having high accuracy and high reliability.

Further, in each of the above-described embodiments, the case where the present invention is applied to the DVD-R / W1 which can record a plurality of times has been described. It is likewise possible to apply the invention to -R.

[0174]

As described above, according to the first aspect of the present invention, an information track is formed with a meandering waveform corresponding to a wobbling signal in which a sub-signal having a higher frequency than the basic signal is multiplexed. Since the wobbling signal is detected at the time of recording the recording information, the sub signal can be extracted and the recording reference signal can be generated.

Therefore, recording information can be recorded based on a recording reference signal having high accuracy and high reliability.

According to the invention described in claim 2, according to claim 1
In addition to the effects of the invention described in (1), since the meandering waveform in the information track adjacent to the pre-pit corresponds to only the basic signal, when recording information is recorded, adverse effects from the sub-signals are detected when detecting the pre-pit. Can be prevented.

According to the third aspect of the present invention, the first aspect
Or, in addition to the effect of the invention described in 2 above, since the sub-signal is phase-modulated based on the predetermined information, predetermined information other than the control information can be recorded in the information recording medium in advance.

According to the invention set forth in claim 4, according to claim 3,
In addition to the effects of the invention described in the above, the information recording medium is a disc-shaped information recording medium in which information tracks and adjacent tracks are formed spirally, and the pre-pits are either odd-numbered information units or even-numbered information units. One is formed only on the adjacent track adjacent to the information track to be recorded, and the meandering waveform corresponding to the wobbling signal including the phase-modulated sub-signal is an odd-numbered information unit or Since either one of the even-numbered information units is provided only in the area on the information track to be recorded, the meandering waveform corresponding to the pre-pit detection and the phase-modulated sub-signal at the time of recording information recording Can be prevented from adversely affecting each other.

According to the fifth aspect of the present invention, the third aspect is provided.
Or, in addition to the effect of the invention described in 4, since the predetermined information is reproduced when the recording information is recorded together with the control information and is the predetermined information used for controlling the recording of the recording information, the control information In addition, predetermined information that can be used for recording control can be further carried on an information recording medium.

According to the invention set forth in claim 6, claim 1 is provided.
In addition to the effects of the invention described in any one of the above items, the information recording medium is a DVD-R / W, the fundamental frequency is 140 kHz, and the sub frequency is 840 kHz. Is six times the fundamental frequency, a sufficiently accurate and reliable recording reference signal can be obtained when recording information is recorded, and the sub-signal can be prevented from affecting the modulation frequency band of the recording information.

According to the seventh aspect of the present invention, an information track having a meandering waveform corresponding to a wobbling signal in which a sub signal having a higher frequency than the basic signal is multiplexed can be formed. At the time of recording the recording information to the sub-signal, the sub-signal is extracted, and the recording reference signal can be generated.

Therefore, recording information can be recorded based on a recording reference signal having high accuracy and high reliability.

According to the invention of claim 8, according to claim 7,
In addition to the effects of the invention described in (1), the meandering waveform in the information track adjacent to the pre-pits corresponds to only the basic signal. Can be prevented.

According to the ninth aspect, according to the seventh aspect,
Or, in addition to the effect of the invention described in 8, since the sub-signal is phase-modulated based on the predetermined information, predetermined information other than the control information can be recorded in the information recording medium in advance.

According to the tenth aspect, in addition to the effects of the ninth aspect, the information recording medium is a disc-shaped information recording medium in which information tracks and adjacent tracks are spirally formed. The recording information is composed of a plurality of information units, and a pre-pit is formed only on an adjacent track adjacent to the information track on which one of the odd-numbered information unit and the even-numbered information unit is to be recorded. At the same time, the meandering waveform corresponding to the wobbling signal including the phase-modulated sub-signal is placed in an area on the information track where one of the odd-numbered information unit or the even-numbered information unit is to be recorded. Since only pre-pits are provided, the detection of pre-pits and the detection of a meandering waveform corresponding to the phase-modulated sub-signal may adversely affect each other during recording of recording information. It can be prevented.

According to the eleventh aspect of the present invention, in addition to the effect of the ninth or tenth aspect, predetermined information is reproduced together with control information when recording information is recorded. Since the predetermined information is used for controlling the recording of information, the information recording medium can further carry predetermined information that can be used for controlling the recording in addition to the control information.

According to the twelfth aspect of the present invention, in addition to the effect of the seventh aspect of the present invention, the information recording medium is a DVD-R / W and the fundamental frequency is 140 kHz, and the sub-frequency is 84
Since the frequency is 0 kHz, the sub-frequency is six times the fundamental frequency, and a sufficiently accurate and reliable recording reference signal is obtained at the time of recording the recording information, and the sub-signal is in the modulation frequency band of the recording information. Influence can be prevented.

According to the thirteenth aspect, an information track is formed with a meandering waveform corresponding to a wobbling signal in which a sub-signal having a higher frequency than the basic signal is multiplexed. Since the detection and the extraction of the sub-signal to generate the recording reference signal, the recording information can be recorded based on the recording reference signal having high accuracy and high reliability.

According to the fourteenth aspect of the invention, in addition to the effect of the thirteenth aspect, the meandering waveform in the information track adjacent to the prepit corresponds to only the basic signal. At the time of detection, an adverse effect from the sub-signal can be prevented.

According to the fifteenth aspect of the present invention, in addition to the effect of the thirteenth or fourteenth aspect, the wobbling signal is detected while the sub-signal is phase-modulated based on predetermined information. Since the predetermined information is extracted from
Predetermined information other than the control information can also be obtained from the information recording medium.

According to the sixteenth aspect of the present invention, in addition to the effects of the fifteenth aspect, the information recording medium is a disc-shaped information recording medium in which information tracks and adjacent tracks are spirally formed. The recorded information is composed of a plurality of information units, and the pre-pit is formed only on an adjacent track adjacent to the information track on which one of the odd-numbered information unit and the even-numbered information unit is to be recorded. Further, a meandering waveform corresponding to the wobbling signal including the phase-modulated sub-signal has an area on the information track where one of the odd-numbered information unit and the even-numbered information unit of the recording information is to be recorded. Since it is provided only in the pre-pit, the detection of the pre-pit and the detection of the meandering waveform corresponding to the phase-modulated sub-signal can be prevented from adversely affecting each other. That.

According to the seventeenth aspect, in addition to the effect of the fifteenth or sixteenth aspect, the predetermined information is reproduced together with the control information when the recording information is recorded. Since this is the predetermined information used for controlling the recording of the information and is reproduced, the predetermined information that can be used for the control of the recording in addition to the control information can be further obtained from the information recording medium.

According to the eighteenth aspect of the present invention, in addition to the effects of the thirteenth to seventeenth aspects, the information recording medium is a DVD-R / W and the fundamental frequency is 140 kHz, and the sub-frequency is 84
Since the frequency is 0 kHz, the sub-frequency is six times the fundamental frequency, so that a sufficiently accurate and reliable recording reference signal can be obtained, and that the sub-signal affects the modulation frequency band of the recording information. Can be prevented.

According to the nineteenth aspect, since the recording information is recorded based on the recording reference signal obtained by extracting the sub-signal having the high frequency, the recording information can be recorded more accurately. Using predetermined information other than the control information, the recording information can be recorded efficiently and more accurately.

[Brief description of the drawings]

FIG. 1 is a diagram showing a structure of a DVD-R / W of an embodiment, (a) is a perspective view showing a structure of a DVD-R / W of the embodiment, and (b) is an arrow in the perspective view. It is sectional drawing which looked at the groove track from the direction.

FIG. 2 is a schematic diagram showing a recording format of pre-information and the like recorded on a DVD-R / W.

FIG. 3 is a schematic diagram illustrating a recording format recorded on a DVD-R / W.

FIG. 4 is a block diagram illustrating an overall configuration of the cutting device according to the embodiment.

FIG. 5 is a block diagram showing a configuration of a preformat encoder.

FIG. 6 is a block diagram illustrating an overall configuration of the information recording apparatus according to the embodiment.

FIG. 7 is a block diagram illustrating a detailed configuration of the information recording apparatus according to the embodiment, (a) is a block diagram illustrating a configuration of a wobble PLL unit, and (b) is a block diagram illustrating a configuration of a spindle control unit. It is.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... DVD-R / W 2 ... Groove track 3 ... Land track 4 ... Pre-pit 5, 8 ... Protective layer 6 ... Reflective layer 7 ... Protective film 9 ... Substrate 9A ... Resin layer 11 ... Recording layer 20 ... Data generator 21 ... Parallel / serial converter 22 Pre-format encoder 23 Clock signal generator 24, 24 _G , 24 _L Laser generator 25 Optical modulator 26 Objective lens 27 Glass base 28 Resist 29, 64 Spindle motor DESCRIPTION OF SYMBOLS 30 ... Rotation detector 31 ... Rotation servo circuit 32 ... Feed unit 33 ... Position detector 34 ... Feed servo circuit 40 ... Frame signal generator 41 ... Gate signal generator for ODD / EVEN judgment 42 ... Judgment device 43 ... Switch 44 ... Recording pre-information generator 50 ... Pickup 51 ... Driver 52 ... Strategy circuit 53 ... DVD encoder D 54 Band pass filter 55 Trap circuit 56 Pre-pit detector 57, 67, 73 Phase comparator 58 Phase shifter 59 Pre-pit decoder 60 Phase modulation decoder 61 PLL unit 62 Spindle controller 63 CPU 65, 66, 71, 72, 80 ... frequency divider 68, 74 ... equalizer 69 ... VCO 70 ... reference signal generation unit 75 ... spindle servo unit B ... light beam C ... cutting device S ... information recording device SP ... light spot SY ... synchronization information CLK ... clock signal WP1 ... first wobble PLL section WP2 ... second wobble PLL section _L L, L _G, B ... light beam S _PP ... pre-information S _R ... recording pre-information S _S ... single rotation detection signal S _E ... EVEN frame signal S _O ... ODD frame signal S _J ... determination signal S _W ... wobbling signal S _G ... gate DOO signal S _H ... first frame signal S _RE ... even-recording pre-information S _RO ... odd recording pre-information S _EC ... EVEN frame count signal S _C ... count signal Sr ... recording data Swc ... recording clock signal Sec ... modulated signal Stt ... recording Signal Sdp: amplified recording signal Sp: detection signal Swp1, Swp2: wobble detection signal Scl, Swcl, Sap: clock signal Sdc: drive control signal Spp: pre-pit signal Scp: comparison signal Sps: phase shift signal Spad: decoding pre-pit signal Shad: Decoding address signal Sct ... control signal

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[Procedure amendment]

[Submission date] September 9, 1999 (September 9, 1999)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

FIG. 2

FIG. 5

FIG. 7

FIG. 3

FIG. 4

FIG. 6

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuo Kuroda 4-2610 Hanazono, Tokorozawa-shi, Saitama Prefecture Pioneer Corporation Inside the Tokorozawa Plant (72) Inventor Yuji Tawaragi 4-2610 Hanazono, Tokorozawa-shi, Saitama Pioneer shares Inside the Tokorozawa Plant (72) Inventor Shiritaka Yoshida 4-2610 Hanazono, Tokorozawa City, Saitama Prefecture Inside the Tokorozawa Plant Pioneer Corporation (72) Inventor Tsutomu Sasaki 4-2610 Hanazono, Tokorozawa City, Saitama Prefecture Inside the Tokorozawa Plant (72) Inventor Yoshitaka Shimoda 4-2610 Hanazono, Tokorozawa City, Saitama Prefecture Pioneer Corporation Tokorozawa Plant F-term (reference) 5D029 WA02 WD12 5D090 AA01 BB01 BB04 CC01 CC04 CC14 DD03 EE05 EE11 FF07 GG03 GG26 GG27

Claims (19)

[Claims] The control information is formed adjacent to an information track on which recording information is recorded, and is used for controlling the recording of the recording information by being reproduced when the recording information is recorded. Corresponding to a wobbling signal obtained by multiplexing an adjacent track recorded by the above and a basic signal having a predetermined constant basic frequency with a sub signal having a higher sub frequency and a certain sub frequency than the basic frequency. An information recording medium comprising: an information track formed to have a meandering waveform. 2. The information recording medium according to claim 1, wherein the meandering waveform in the information track at a position adjacent to the prepit in the information track corresponds to the wobbling signal including only the basic signal. An information recording medium characterized by being formed by: 3. The information recording medium according to claim 1, wherein the sub-signal is phase-modulated based on predetermined information set in advance. 4. The information recording medium according to claim 3, wherein the information recording medium is a disc-shaped information recording medium in which the information track and the adjacent track are spirally formed, and the recorded information is a plurality of pieces of information. And the pre-pit is located on the adjacent track adjacent to the information track on which one of the odd-numbered information unit or the even-numbered information unit of the recording information is to be recorded. And the meandering waveform corresponding to the wobbling signal including the phase-modulated sub-signal is one of the odd-numbered information unit or the even-numbered information unit of the recording information. The information recording medium is provided only in an area on the information track where the information is to be recorded. 5. The information recording medium according to claim 3, wherein the predetermined information is used for controlling recording of the recording information by being reproduced when the recording information is recorded together with the control information. An information recording medium characterized in that the information is predetermined information. 6. The information recording medium according to claim 1, wherein the information recording medium is a DVD-R / W (DVD-ReWritable).
An information recording medium, wherein the fundamental frequency is 140 kHz, and the sub-frequency is 840 kHz. 7. A medium manufacturing apparatus for manufacturing the information recording medium according to claim 1, wherein: a generating unit for generating the wobbling signal; a generating unit for generating a prepit signal for forming the prepit; The information track is formed by generating the wobbling signal from the generation means and performing wobbling in accordance with the generated wobbling signal,
A medium forming device for forming the adjacent track while forming the prepit based on the generated prepit signal. 8. The medium manufacturing apparatus according to claim 7, wherein the wobbling signal corresponding to the meandering waveform in the information track at a position adjacent to the prepit in the information track includes only the basic signal. A medium manufacturing apparatus characterized by the above-mentioned. 9. The medium manufacturing apparatus according to claim 7, wherein the sub-signal is phase-modulated based on predetermined information set in advance. 10. The medium manufacturing apparatus according to claim 9, wherein the information recording medium is a disc-shaped information recording medium in which the information tracks and the adjacent tracks are spirally formed, and the recording information is a plurality of pieces of information. And the forming unit is configured to be provided on the adjacent track adjacent to the information track in which one of the odd-numbered information unit or the even-numbered information unit is to be recorded. Only forming the pre-pits, and forming a meandering waveform corresponding to the wobbling signal including the phase-modulated sub-signal into one of the odd-numbered information units or the even-numbered information units of the recording information. The medium manufacturing apparatus is provided only in an area on the information track on which information is to be recorded. 11. The medium manufacturing apparatus according to claim 9, wherein the predetermined information is used for controlling recording of the recording information by being reproduced when the recording information is recorded together with the control information. A medium manufacturing apparatus characterized in that the information is predetermined information. 12. The medium manufacturing apparatus according to claim 7, wherein the information recording medium is a DVD-R / W, the fundamental frequency is 140 kHz, and the sub-frequency is Is 840 kilohertz. 13. A detecting means for detecting the wobbling signal and the pre-pit from the information recording medium according to claim 1, when recording the recording information on the information track, and detecting the wobbling signal from the detected wobbling signal. Extracting means for extracting a sub-signal; generating means for generating a recording reference signal for recording the recording information based on the extracted sub-signal; and reproducing the control information based on the detected pre-pit. An information detecting device comprising: a reproducing unit. 14. The information detection device according to claim 13, wherein the meandering waveform in the information track at a position adjacent to the prepit in the information track corresponds to the wobbling signal including only the basic signal. An information detection device characterized by being formed by: 15. The information detection device according to claim 13, wherein the sub signal is phase-modulated based on predetermined information, and the predetermined information is obtained from the detected wobbling signal. An information detecting device further comprising a second extracting unit for extracting the information. 16. The information detection device according to claim 15, wherein the information recording medium is a disc-shaped information recording medium in which the information track and the adjacent track are spirally formed, and the recorded information is a plurality of information. And the pre-pit is located on the adjacent track adjacent to the information track on which one of the odd-numbered information unit or the even-numbered information unit of the recording information is to be recorded. And the meandering waveform corresponding to the wobbling signal including the phase-modulated sub-signal has one of the odd-numbered information unit or the even-numbered information unit of the recording information. An information detecting device provided only in an area on the information track to be recorded. 17. The information detection device according to claim 15, wherein the predetermined information is used for controlling recording of the recording information by being reproduced when the recording information is recorded together with the control information. An information detecting apparatus, further comprising: a second reproducing unit that reproduces the extracted predetermined information as the predetermined information. 18. The information detection device according to claim 13, wherein the information recording medium is a DVD-R / W, the fundamental frequency is 140 kHz, and the sub-frequency is Is 840 kilohertz. 19. The information detecting apparatus according to claim 13, wherein the reproduced control information or at least one of the reproduced predetermined information, and the generated recording information. An information recording apparatus, comprising: recording means for recording the recording information on the information track based on a reference signal.