JP2001344755A - Device and method for recording information and optical recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform stable and reliable recording to an optical recording medium corresponding to high recording density. SOLUTION: In the case of performing a recording operation to an optical disk 1, a wobble signal (ATIP signal) recorded in the pre-groove 5 is detected and whether the disc is a conventional optical disk or an optical disk of high recording density is discriminated by an ATIP decoder 16. In accordance with the result of this discrimination, a control part 20 controls each part to regulate both end positions of a radial direction in at last one of a read-in area, a program area and a read-out area for writing by an optical pickup 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording apparatus and an information recording method for recording an information signal along a recording track on a disk-shaped optical recording medium. Also,
The present invention relates to recording of an information signal along a recording track and / or
The present invention also relates to a disk-shaped optical recording medium on which reproduction is performed.

[0002]

2. Description of the Related Art An optical recording medium is formed in a disk shape with a signal recording layer. By irradiating the signal recording layer with a light beam, recording and / or reproduction of an information signal (hereinafter referred to as an information signal) is performed. , Recording and reproduction).

As such an optical recording medium, for example, C
D (Compact Disc) and CD-ROM (CD-Read Only Mem)
ory), there is a read-only optical disk in which pit strings corresponding to information signals to be recorded are formed in advance on a disk substrate. In such a read-only optical disk, the main surface on the disk substrate on which the pit array is formed has a function as a signal recording layer. In a CD, the mark length of each pit constituting a pit row is a length obtained by standardizing an information signal to be recorded at a predetermined bit interval T. That is, the mark length of each pit constituting the pit row is an integral multiple of the bit interval T, and the mark length of the shortest pit is, for example, three times the bit interval T (3T).

[0004] For example, an optical disk (hereinafter, referred to as a CD-R) to which an information signal can be additionally written has been put to practical use, which is used in a so-called compact disk recordable system. In a CD-R, a signal recording layer on which an information signal is recorded is formed of an organic dye-based material, and recording is performed by irradiating a light beam to change the reflectance at this irradiation position. The recorded signal is reproduced by detecting the reflectance of the signal recording layer.

As an optical recording medium, a magneto-optical disk such as a mini-disc (MD) for recording and reproducing on a signal recording layer using a magneto-optical effect, and a CD-RW (CD) -Rewritable) etc.
A phase-change optical disk or the like in which a recording signal can be rewritten using a phase change of a signal recording layer has been put to practical use.

[0006] Among the various optical recording media as described above,
For example, in a CD-R, a pre-groove is formed along a recording track. Here, the pre-groove is a guide groove formed so as to meander at a predetermined cycle. By making the guide groove meander, the guide groove itself is configured to have a signal component. The guide groove is a groove formed along a recording track in order to facilitate tracking servo by, for example, a push-pull method.

On CD-R, FM (Frequency Modulati
on) The sector information including the modulated absolute time information is recorded as a signal (hereinafter referred to as a wobble signal) by the pre-groove. That is, in a compact disk recordable system using a CD-R as a recording medium, a light beam is condensed on a pre-groove and its reflected light is detected, thereby, for example, 2
A wobble signal having a carrier of 2.05 kHz is detected,
By performing FM demodulation of the wobble signal, recording and reproduction are performed while detecting absolute time information. As described above, the method in which the absolute time information is recorded as a wobble signal is as follows.
It is generally called ATIP (Absolute Time In Pregroove). Note that there is a method called ADIP (Address In Pregroove) in which address information is recorded as a wobble signal.

In the CD-R, while reading the wobble signal as described above, EFM modulation (8 → 14 modulation) is performed on a recording track based on the wobble signal.
The recorded information signal is recorded and reproduced.

As described above, in the system in which the sector information including the absolute time information and the address information is recorded as the wobble signal, the information signal can be continuously recorded and reproduced. This is advantageous in maintaining compatibility with the recorded optical disk. Instead of recording sector information such as absolute time information and address information in the wobble signal, for example, in a method of recording the sector information at the beginning of each sector, the absolute time information and address information and the information signal to be recorded are divided by time division. As a result, the information signal to be recorded becomes discontinuous, and it becomes difficult to maintain compatibility with an optical disk on which information signals such as a CD are continuously recorded.

As described above, in addition to the CD-R, examples of the optical disk on which the wobble signal is recorded in the pre-groove formed along the recording track include MD and CD-RW. .

[0011]

By the way, in the above-mentioned optical disk, the recording density is increased so that more information signals can be recorded while keeping the same outer dimensions as the standardized existing optical disk. It is strongly desired. For example, as an optical disk having a higher recording density than an optical disk such as a conventional CD or CD-ROM, for example, DVD-R, DVD-RW, DV
D + RW and the like have been proposed.

However, these DVD-Rs and DVDs
-RW, DVD + RW, etc., the CD or C
Unlike an optical disk of a D-ROM, a recording signal is recorded not by EFM modulation but by EFM + modulation (8 → 16 modulation). Also, the wobble signal is not a signal that is FM-modulated at 22.05 kHz as in the case of the existing optical disk described above. DVD-R and DVD-RW use a wobble signal having a single-wavelength SIN waveform, and DVD + RW uses a wobble signal modulated by PM (Phase Modulation).

For this reason, the DVD-R and DVD-
In order to provide compatibility with existing CDs and CD-ROMs in a recording / reproducing apparatus that performs recording / reproducing on RW or the like, it is necessary to separately provide modulation / demodulation circuits for information signals and wobble signals. There was a problem that it became complicated and cost increased.

Further, for example, in an optical disk used exclusively for reproduction, in which a pit row corresponding to an information signal is formed, such as a CD or a CD-ROM which has been widely used in the past, this pit row is formed at a high density. To increase the recording density
In the case of increasing the capacity, there is a problem in that when reproduction is performed by a conventional recording / reproducing apparatus, jitter increases and C / N decreases, and a stable reproducing operation becomes difficult.

The present invention has been made in view of the above-mentioned circumstances, and is intended for both a standardized existing optical recording medium and an optical recording medium compatible with high recording density.
An object of the present invention is to provide an information recording apparatus and an information recording method capable of easily performing stable and reliable recording.
Another object of the present invention is to provide an optical recording medium capable of realizing high recording density while maintaining compatibility with a standardized existing optical recording medium.

[0016]

SUMMARY OF THE INVENTION An information recording apparatus according to the present invention is an information recording apparatus for recording an information signal along a recording track on a disk-shaped optical recording medium. It comprises a recording unit, a determination unit, and a control unit. The rotation driving means rotationally drives the optical recording medium. The recording means is movable in the radial direction of the optical recording medium, and performs recording on the optical recording medium. The determining means determines the recording density of the optical recording medium. The control means regulates the radial ends of at least one of a lead-in area, a program area, and a lead-out area to be written by the recording means in accordance with the result of the determination by the determination means.

The information recording apparatus according to the present invention configured as described above can set the recording area in accordance with the recording density of the optical recording medium determined by the determining means. Each area such as a lead-in area, a program area, and a lead-out area can be written at optimal positions on an optical recording medium having a higher recording density than the existing optical recording medium.

Further, an information recording method according to the present invention is an information recording method for recording an information signal on a disk-shaped optical recording medium along a recording track, and has a determining step and a recording step. . In the determining step, the recording density of the optical recording medium is determined. In the recording step, in accordance with the result of the discrimination in the discrimination step, both ends in the radial direction of at least one of a lead-in area, a program area, and a lead-out area to be written on the optical recording medium are regulated. I do.

According to the information recording method of the present invention as described above, recording can be performed in the recording step according to the recording density of the optical recording medium determined in the determining step. Each area such as a lead-in area, a program area, and a lead-out area can be written at optimal positions on an optical recording medium having a higher recording density than the existing optical recording medium.

Further, the optical recording medium according to the present invention is a disk-shaped optical recording medium on which information signals are recorded and / or reproduced along recording tracks. Further, a modulation / demodulation method of an information signal for performing recording and / or reproduction on the recording track and a modulation / demodulation method of a wobble signal recorded on a pre-groove formed along the recording track,
The recording density is higher than that of the existing optical recording medium, while being the same as the modulation / demodulation method of the existing optical recording medium. Further, the radial width of the lead-out area in at least the first session is set to 30 seconds to 60 seconds as an absolute time included in the wobble signal.

In the optical recording medium according to the present invention having the above-described configuration, the modulation and demodulation method of the information signal and the modulation and demodulation method of the wobble signal are the same as those of the existing optical recording medium. It is easy to ensure compatibility with the existing optical recording medium, and the radial width of the lead-out area is set to 30 seconds to 60 seconds. Large capacity can be realized.

The optical recording medium according to the present invention is a disk-shaped optical recording medium on which information signals are recorded and / or reproduced along recording tracks. Further, the modulation / demodulation method of an information signal for recording and / or reproduction on the recording track and the modulation / demodulation method of a wobble signal recorded on a pre-groove formed along the recording track are used in the existing optical recording medium. The recording density is higher than that of this existing optical recording medium while being the same as the modulation / demodulation method. Furthermore, the lead-in area is φ45.2 mm to φ4
The lead-out area is set at a position of φ116 mm to φ118 mm while the position is set at 8 mm.

In the optical recording medium according to the present invention having the above-described configuration, the modulation and demodulation method of the information signal and the modulation and demodulation method of the wobble signal are the same as those of the existing optical recording medium. It is easy to ensure compatibility with this existing optical recording medium. In addition, the lead-in area is set at a position of φ45.2 mm to φ48 mm, and this position is the same as a standardized optical recording medium such as a conventional DVD. In addition, it becomes easy to divert a recording / reproducing apparatus that performs recording / reproducing on a conventional optical recording medium.

[0024]

Embodiments of the present invention will be described below in detail with reference to the drawings. In the following, an optical disc 1 as shown in FIG.
An information recording method and an information recording device for recording an information signal to the information recording apparatus will be described.

As shown in FIGS. 1 and 2, the optical disk 1 includes a disk substrate 2 formed of a resin material such as polymethyl methacrylate (PMMA) or polycarbonate (PC) into a substantially disc shape. Further, on the disk substrate 2, a signal recording layer 3 on which a recording mark corresponding to an information signal to be recorded is formed, and a protective layer 4 formed by spin-coating, for example, an ultraviolet curing resin or the like, are sequentially formed.

In the optical disc 1, the signal recording layer 3
For example, it is formed in a thin film shape using an organic dye-based material. In this case, the optical disk 1 irradiates the signal recording layer 3 with a light beam so that a recording mark is formed at this irradiation position, and an information signal is recorded. Then, the signal recording layer 3 is irradiated with a light beam, and by detecting a change in reflectance according to the presence or absence of a recording mark,
The reproduction of the information signal is performed. In this case, the optical disk 1
Is used as a write-once optical disc in the same manner as a conventionally used CD-R.

In the optical disc 1, the signal recording layer 3 may be formed in a thin film of, for example, a phase change material. In this case, the optical disc 1 has the signal recording layer 3
Is irradiated with a light beam to form a recording mark that has been changed in phase according to the information signal to be recorded. In this case, the optical disc 1 is used as a phase-change type optical disc in which a recording signal can be rewritten by utilizing a phase change of the signal recording layer 3, similarly to a conventionally used CD-RW.

In the optical disk 1, in addition to the signal recording layer 3, for example, Au, A, and A are used for the purpose of improving the use efficiency of the light beam or diffusing the heat generated by the irradiation of the light beam.
A light reflecting layer formed of g, Al, or the like, or a dielectric layer or the like for the purpose of improving the adhesion between the layers may be provided.

The disk substrate 2 has a center hole 2a formed at the center thereof. When recording and reproduction are performed by the recording and reproducing apparatus, the optical disk 1 is supported and fixed by the rotation drive mechanism of the recording and reproducing apparatus near the center hole 2a.
It is driven to rotate at a predetermined speed. Also, the disk substrate 2
Has a light-transmitting property with respect to a light beam used for recording and reproduction. Then, a light beam is incident from the main surface 2b of the disk substrate 2 on which the respective layers are not stacked, and recording / reproduction with respect to the signal recording layer 3 is performed.

As shown in FIG. 3, a pre-groove 5 which is a guide groove is formed on the main surface 2c of the disk substrate 2 on which the respective layers are stacked. The main surface 2c
In the figure, a portion where the pre-groove 5 is not formed is a land 6. In the optical disc 1, a portion corresponding to the pre-groove 5 is set as a recording track, and an information signal (EFM signal) subjected to EFM modulation is recorded on this recording track. .

That is, in the optical disc 1, the light beam is irradiated on the signal recording layer 3 along the recording track. Then, recording is performed by forming a recording mark corresponding to the information signal to be recorded on the signal recording layer 3, and the presence or absence of the recording mark formed on the signal recording layer 3 is detected by detecting a change in the reflected light amount of the light beam. Perform playback.

The pre-groove 5 is meandered (wobbled) at a predetermined cycle while the main surface 2 of the disk substrate 2 is being moved.
It is formed spirally or concentrically on c. In the optical disc 1, recording and reproduction of an information signal with respect to the signal recording layer 3 are performed based on a wobble signal recorded as wobbling of the pre-groove 5. In the optical disc 1 to which the present invention is applied, as a wobble signal, a signal obtained by FM-modulating sector information including absolute time information, that is, an AT signal
An IP (Absolute Time In Pregroove) signal is recorded in the pregroove 5.

In the following, the wobble signal (ATI
The P signal will be described in detail.

The wobble signal is formed such that the center frequency becomes, for example, 22.05 kHz when the optical disc 1 is rotated at a standard speed (linear speed of 1.2 m / s to 1.4 m / s). Here, ATIP as time axis information
One sector of the signal is one data sector (23
52) It matches the byte, and the information signal is written while synchronizing the data sector with the sector of the ATIP signal.

FIG. 4 shows the frame structure of the ATIP information indicated by the ATIP signal. The first four bits are the synchronization signal S
The “minute”, “second”, and “frame” indicating the absolute time on the optical disc 1 are “2 DigitBC”, respectively.
D ”(8 bits). 14-bit CR
C (Cyclic Redundancy Code) is added, for a total of 42
One frame is composed of bits. Note that the time axis information is multiplexed so that information such as the recommended value of the optimum recording power of the light beam is included at a predetermined ratio.

Next, of the ATIP information, the synchronization signal SY
The NC will be described in more detail.

In an existing standardized optical disk whose recording density has not been improved, the pattern of the synchronization signal SYNC is configured, for example, as shown in FIG.
That is, the ATIP information shown in FIG. 5A is bi-phase mark converted to become the channel bit pattern shown in FIG. 5B or 5D. Here, the synchronization signal SYNC is
If the immediately preceding channel bit is “0”, the signal shown in FIG.
As shown in FIG. 5, the channel bit pattern is “11101000”, and the bi-phase signal D _BP after the bi-phase mark conversion has the waveform shown in FIG. 5C. Also,
When the immediately preceding channel bit is “1”, the state shown in FIG.
Are shown as being a channel bit pattern of "00010111", the bi-phase signal _{D BP} is a waveform shown in FIG. 5E.

The bi-phase signal D _BP obtained in this way becomes a wobble signal after being FM-modulated.
Specifically, for example, in the biphase signal _{D BP} shown in FIG. 5C or FIG. 5E, when there is a high level "H", the wobble signal is a 23.05KHz,
When the low level is "L", the wobble signal is FM-modulated so as to be 21.05 kHz, and the center frequency of the wobble signal is set to 22.05 kHz.

According to the present invention, the synchronization signal SYNC pattern of the ATIP information in the optical disk 1 having a higher recording density is compared with the existing optical disk as described above by using FIG.
Alternatively, as shown in FIG. 6D, the pattern is different from that shown in FIG. By doing so, even if the optical disk is in an unused state in which no data is written, the wobble signal is detected and the synchronization signal S of the ATIP information is detected.
By determining the YNC pattern, it is possible to easily determine whether the optical disk is an existing optical disk or the optical disk 1 with a high recording density.

The synchronization signal SYNC pattern in the optical disc 1 with a higher recording density includes "minute", "second",
It is desirable to use a pattern that is unlikely to appear in the “frame” and “CRC” data series. Specifically, for example, the time axis information is bi-phase mark modulated,
Assuming that the minimum channel bit interval is “T”, the signal after bi-phase mark modulation is composed of a pattern of “T” or “2T”. Therefore, it is desirable to use a pattern of “3T” or more. In addition, the high level “H” and the low level “L” of the biphase mark modulated signal
It is desirable to use a pattern in which the waveforms are uniformly dispersed and have a good DC balance. As a synchronization signal SYNC pattern satisfying such a condition, FIG. 6B or FIG. 6D
As shown in FIG.
It is desirable that the pattern be "0010" or "00011101".

By the way, for example, CD-R and CD-RW
In an existing optical disk such as the one shown in FIG.
It is set as shown in That is, in the existing optical disk, the diameter is set to 120 mm, the lead-in area is set to 46 mm to 50 mm, the program area is set to 50 mm to 116 mm, and the lead-out area is set to 116 mm to 118 mm.

On the other hand, in the optical disc 1 with a high recording density according to the present invention, as shown in FIG. 8, the lead-in area is φ45.2 (+0, −0.2) mm to φ48.
(+0, -0.4) mm, the program area is set to φ48 mm to φ116 mm, and the lead-out area is set to φ116 mm to φ118 mm.

As described above, the optical disc 1 has the lead-in area and the lead-out area set at positions different from those of the existing optical disc, thereby expanding the program area. Therefore, it is possible to realize a further increase in capacity in addition to an increase in recording density as compared with an existing optical disc. In addition, since the start position of each area is different from that of an existing optical disc such as a CD-R or CD-RW, it is necessary to determine the existing optical disc during reproduction using this difference in the start position. Becomes possible.

As described above, the start position of the lead-in area is set to φ45.2 mm, and the start position of the program area is set to φ48 mm. Because of the similarity, it becomes easy to perform recording and reproduction by using a recording and reproducing apparatus that performs recording and reproduction for this DVD. Further, it is easy to divert a conventional DVD manufacturing apparatus.

In the optical disk 1, when writing a plurality of sessions in the recording area, a plurality of lead-in areas, program areas, and lead-out areas are formed. That is, FIG. 8 shows the position of the lead-in area formed on the innermost peripheral side and the outermost position where the lead-out area can be formed. Also, the optical disk 1
Then, on the inner peripheral side of the lead-in area, a PCA (PoI) for trial writing to optimize the recording power of the light beam
PMA (Program Memory Are) that temporarily stores the wer calibration area (Address Calibration Area) and address information necessary for additional recording
a) may be set.

The start position of the lead-in area and the maximum start position of the lead-out area are multiplexed together with information such as the optimum recording power of the light beam so as to be included in the wobble signal at a predetermined ratio. You may. Thus, the optical disc 1 can determine the existing optical disc by detecting the wobble signal.

Next, a description will be given of a case where an information signal is recorded on the optical disk 1 configured as described above using the information recording apparatus 10 as shown in FIG. In addition,
In the following description, the information recording device 10 is described as being capable of not only recording information signals on the optical disc 1 but also reproducing information signals recorded on the optical disc 1.

In the information recording apparatus 10, the optical disk 1
Is rotated at a predetermined speed by the spindle motor unit 11. Incidentally, the spindle motor 11, the spindle drive signal S _SD from the spindle motor driving section 12 which will be described later, to rotate the optical disc 1 at a predetermined rotational speed.

The optical disk 1 is irradiated with a light beam whose light amount is controlled from an optical pickup 13 of the information recording device 10. The light beam reflected by the optical disc 1 is applied to a light detection unit (not shown) of the optical pickup 13. The photodetector is configured using a split photodetector or the like, generates a voltage signal corresponding to the reflected light by photoelectric conversion and current-voltage conversion, and supplies the generated voltage signal to the RF amplifier 14.

In the RF amplifier section 14, the optical pickup 1
3, a read signal S _RF , a focus error signal S _FE , a tracking error signal S _TE , and a wobble signal S _WB are generated. The read signal S _RF , the focus error signal S _FE , and the tracking error signal S _TE among the signals generated by the RF amplifier unit 14 are supplied to the clock generation / servo control unit 15. Further, the wobble signal _SWB is supplied to the ATIP decoder 16.

The clock generation / servo control unit 15 controls the objective lens of the optical pickup 13 based on the supplied focus error signal _{SFE such} that the focal position of the light beam is located at the position of the signal recording layer 3 of the optical disc 1. supplies (not shown.) to the focus control signal S _FC generated by the driver 17 for controlling. Further, based on the supplied tracking error signal S _TE, as the irradiation position of the light beam becomes the center of the recording track to be desired, and generates a tracking control signal S _TC for controlling the objective lens of the optical pickup 13 To the driver 17.

In the driver 17, the focus control signal S
_A focus drive signal S _FD is generated based on the _FC and a tracking drive signal S _TD is generated based on the tracking control signal S _TC . The generated focus drive signal S _FD and tracking drive signal S _TD
To the actuator of the optical pickup 13 (not shown).
By controlling the position of the objective lens, the position of the objective lens is controlled so that the light beam is focused at the center position of the desired recording track.

[0053] Also, in the clock generating / servo controlling section 15 performs the asymmetry correction and binarization of the supplied reading signal S _RF, and digital conversion, readout data signal D
_The data is supplied to the data processing unit 18 as _RF . Also, a clock signal CK synchronized with the digital signal obtained by the conversion.
_RF is also generated, and the generated clock signal CK _RF is supplied to the data processing unit 18.

Further, the clock generation / servo control unit 15
In, so that the irradiation position of the light beam does not exceed the tracking control range is supplied to the thread portion 19 generates a thread control signal S _SC for moving the optical pickup 13 in the radial direction of the optical disc 1. In the thread unit 19,
By driving the sled motor (not shown.) Based on the sled control signal S _SC, moves the optical pickup 13 in the radial direction of the optical disc 1.

In the ATIP decoder 16, R
Wobble signal S supplied from F amplifier section 14_WBTo
After applying a bandpass filter, the wobble signal S
_WBGenerates a clock signal synchronized with the carrier component of
And the wobble signal S _WBIs binarized. So
And the wobble binarized based on the clock signal.
Signal S_WBPerforms the bi-phase mark demodulation processing of the
IP information signal D_ADGenerate In addition, the obtained ATI
P information signal D_ADATI synchronization signal pattern is detected and ATI
P synchronization detection signal F_SYGenerate And the ATIP information
Notification signal D_ADIs supplied to the control unit 20 and the ATI
P synchronization detection signal F_SYTo the spindle motor drive unit 12
Supply.

In the information recording apparatus 10 to which the present invention is applied,
ATIP information signal D generated by ATIP decoder 16
_{From the AD} , a channel bit pattern as shown in FIGS. 5 and 6 is detected, and it is determined whether the optical disk 1 is an existing optical disk or an optical disk with a higher recording density. Specifically, for example, the ATIP information signal D _AD
The pattern of the synchronization signal SYNC included in
000 ”or“ 00010111 ”, the optical disc 1 is determined to be a standardized existing optical disc, and if the pattern of the synchronization signal SYNC is“ 111100010 ”or“ 00011101 ”, the optical disc 1 is increased in recording density. It is determined that the optical disk has been burned. This determination may be made by the ATIP decoder 16,
This may be performed by the data processing unit 18 or the control unit 20 described later.

[0057] Incidentally, the information recording apparatus 10, the synchronization signal SYN included in ATIP information signal _{D AD} as described above
Instead of performing the determination using the C pattern, for example, FIG.
As described with reference to FIG. 8 and FIG. 8, the existing optical disc and the optical disc 1 with a higher recording density may be determined by detecting the formation position of each recording area. Also, for example, by detecting the values of the start position of the lead-in area and the maximum start position of the lead-out area multiplexed on the wobble signal of the optical disk 1, the existing optical disk and the optical disk 1 with a higher recording density can be separated. It may be determined.

In the data processing section 18, the read data signal D
EFM-modulating _RF and using RAM 21
Deinterleave processing and CIRC (Cross Interleave Ree
d-Solomon Code). further,
Descramble processing and ECC (Error Correcting Cod)
The error correction processing and the like in e) are also performed. Here, the data signal subjected to the error correction processing is stored in the RA as a buffer memory.
After being temporarily stored in M22, it is supplied as a reproduced data signal RD to an external computer device or the like via the interface 23.

The data processing unit 18 extracts a subcode from the signal after the EFM demodulation and supplies it as a signal _DSQ to the control unit 20, and detects a frame synchronization signal F _SZ in the signal after the EFM demodulation. It is supplied to the spindle motor drive unit 12.

When recording information signals on the optical disc 1, the spindle motor driving section 12
ATIP synchronization detection signal F _SY from TIP decoder 16
When an information signal recorded on the optical disc 1 is reproduced, the frame synchronization signal F _SZ from the data processing unit 18 or the ATIP synchronization detection signal F _SY from the ATIP decoder 16 is used. the generating a spindle drive signal S _SD for rotating at a predetermined rotational speed. By supplying a spindle drive signal S _SD generated by the spindle motor driving section 12 to the spindle motor unit 11, the optical disk 1 is driven at a predetermined rotational speed.

Further, when the recording data signal WD is supplied from an external computer or the like via the interface 23, the data processing section 18 temporarily stores the recording data signal WD in the RAM 22, and temporarily stores the recording data signal WD in the RAM 22. The signal WD is read out, encoded into a predetermined sector format, and an error correction E
Add CC. Further, it also performs CIRC encoding processing, EFM modulation, and the like, generates a write signal DW, and supplies the write signal DW to the write compensator 24.

The write compensator 24 generates a laser drive signal LDA based on the supplied write signal DW and supplies it to the laser diode of the optical pickup 13. Here, the write compensating section 24, based on the power compensating signal P _C from the control unit 20 described below, characteristics and light beam spot shape of the signal recording layer 3 of the optical disc 1, such as the relative linear velocity of the recording track , The signal level of the laser drive signal LDA is corrected. Thereby, the information recording apparatus 10 can perform the recording operation by optimizing the power of the light beam output from the laser diode of the optical pickup 13.

The control unit 20 is connected to a ROM 25. The control unit 20 controls the operation of the information recording device 10 based on the operation control program stored in the ROM 25. For example, A from the ATIP decoder 16
From the synchronization pattern of the TIP information signal D _AD, it determines whether the optical disc the optical disc 1 is recording density or an existing optical disk. Alternatively, for example, the discrimination result, the signal D _SQ such as a subcode generated by the data processing unit 18, or the ATIP
Based on the location information of the recording area indicated by the information signal D _AD, control signal C to the clock generating / servo controlling section 15
_TA or the control signal C _TB to the data processing unit 18.
Or supply.

The control unit 20 controls the ATIP information signal D
Based on the setting information of the recording laser power indicated by _AD, and supplies the write compensating section 24 generates a power compensation signal P _C. Further, the control unit 20 supplies a control signal _CTC to the RF amplifier unit 14, and the RF amplifier unit 14 controls on / off of a laser diode of the optical pickup 13 and reduces disturbance to laser noise and a read signal. For the purpose, a process of superimposing a high frequency on the light beam is also performed.

The control unit 20 controls each unit of the information recording device 10 in accordance with the result of discrimination between the existing optical disc and the optical disc with a higher recording density, thereby reading the data to be written on the optical disc 1. A radial end position is set in at least one of the in area, the program area, and the lead-out area.
Specifically, by controlling the thread unit 19 that moves the optical pickup 13 in the radial direction of the optical disc 1,
The position at which each area is written is regulated. Thereby, in the information recording apparatus 10 to which the present invention is applied, for example, a CD-R
For an existing optical disc such as a CD-ROM or a CD-RW, and an optical disc having a higher recording density than this existing optical disc, each area such as a lead-in area, a program area, and a lead-out area is located at an optimum position. Can write. Therefore, it is easy to perform stable and reliable recording on both the standardized existing optical disk and the optical disk compatible with high recording density.

In the information recording apparatus 10, specifically, when regulating the positions of both ends of the lead-out area in each session to be recorded on the optical disc 1, it is desirable to control the writing time of the lead-out area. In the optical disc 1, the position of the recording track is recorded in the pre-groove 5 of this recording track by using an ATI
It is recorded as a P signal. Therefore, when writing each area, the width in the radial direction of each area to be formed is determined by controlling the writing time based on the absolute time included in the ATIP signal, and as a result, both end positions are determined. .

In the information recording apparatus 10, the writing time to be controlled is the absolute time on the optical disk 1 included in the ATIP signal, not the actual time at the time of writing. That is, for example, even when the optical disc 1 is rotated at a double speed or a quadruple speed by the spindle motor unit 11 compared to the standard rotation speed, and the writing is performed twice or four times faster than the standard writing time, By regulating the time for writing each area based on the absolute time, the position of each area actually formed does not deviate from the desired position.

In the information recording apparatus 10, when the lead-out area is written on the optical disk 1 having a higher recording density in the same writing time as that of an existing optical disk having a standard density, the track pitch of the optical disk 1 is reduced. Since the optical disk is set to be narrower than the optical disk and the line density is set to be higher, the radial width of the lead-out area is reduced. In this case, in the information recording apparatus 10, when reproducing the information signal recorded on the optical disc 1, when the seek operation of the optical pickup 13 is performed,
When the optical pickup 13 jumps out to the outer peripheral portion of the optical disk, the light beam to be irradiated is deviated from the recording area, and there is a possibility that it is difficult to stably perform a normal recording / reproducing operation.

However, in the information recording apparatus 10 to which the present invention is applied, it is possible to discriminate between the existing optical disc and the optical disc 1 with a high recording density and set the write time of the lead-out area according to each optical disc. Therefore, even when recording is performed on the optical disc 1 having a high recording density by reducing the track pitch, the lead-out area can be written with the same width as the existing optical disc.

Specifically, for example, when the recording density of the optical disc 1 is increased N times (N is a positive number larger than 1) as compared with the existing optical disc, the writing time of the lead-out area is reduced. Is also preferably N times. This makes it possible to make the radial width of the lead-out area written on the optical disc 1 equal to that of the existing optical disc.

That is, when the information recording apparatus 10 finishes recording the information signal on the optical disc 1 and performs a finalizing operation for writing the lead-in area and the lead-out area,
It operates as shown in FIG. When the writing operation of the lead-in area is started, as shown in step S30 in FIG. 10, the optical disk on which the recording operation is being performed is an existing optical disk having a standard recording density, or has a higher recording density. It is determined whether the optical disk 1 has been used. This determination may be made by the ATIP decoder 16 by detecting the channel bit pattern recorded in the synchronization signal SYNC of the ATIP information, as described above, or by the data converter 18 or the controller 20.
May be performed. If it is determined that the optical disc has the standard recording density, the next step S3
The process proceeds to 1. If the optical disc 1 has a higher recording density, the process proceeds to step S32.

In step S31, it is determined whether or not the session in which the recording operation was performed is the first session on the optical disc. If it is the first session, the process proceeds to step S33. If it is the second or subsequent session, the process proceeds to step S34.

In step S33, for example, the CD
Write the lead-out area with a length of 90 seconds in absolute time, as defined in the -R and CD-RW standards. Then, the write operation of the lead-out area ends.

In step S34, step S3
In the same manner as in 3, the lead-out area is written with a length of 30 seconds in absolute time, for example, as specified in the CD-R and CD-RW standards. Then, the write operation of the lead-out area ends.

In addition, such as CD-R and CD-RW,
In an optical disc of the so-called CD family, when writing a plurality of sessions, the writing length of the lead-out area in the first session is set to 90 seconds, and the writing length of the lead-out area in the second and subsequent sessions is set. Is set to 30 seconds. Therefore, as described above, it is desirable to change the write time of the lead-out area depending on whether the session in which the recording operation was performed is the first session or the second and subsequent sessions.

In step S32, it is determined whether the session in which the recording operation was performed is the first session on the optical disc. If it is the first session, the process proceeds to step S35, and if it is the second or subsequent session, the process proceeds to step S36.

In step S35, the lead-out area is written with an absolute time length N times that in step S33. Then, the write operation of the lead-out area ends.

In step S36, the lead-out area is written with an absolute time length N times that in step S34. Then, the write operation of the lead-out area ends.

Further, in the information recording apparatus 1, as described above, the writing time of the lead-out area on the optical disk 1 having a higher recording density is limited to N times the writing time of the existing optical disk. is not. For example, for the optical disc 1 with a high recording density, the write time of the lead-out area is set to 30 seconds to 60 seconds.
Each unit may be operated so as to be seconds. That is,
In this case, in steps S35 and S36 shown in FIG. 10, each unit is operated such that the writing time of the lead-out area is 30 seconds to 60 seconds in absolute time. Hereinafter, this case will be described.

In recent years, in an information recording apparatus 1 that performs recording and reproduction on an optical disk of the so-called CD family, such as a CD-R and a CD-RW, the optical pickup 13 is moved in the radial direction of the optical disk. The moving resolution of the thread section 19 to be set is about 150 μm or more. Therefore, in the optical disk 1, the radial width of the lead-out area is secured to be several times as long as 150 μm, thereby preventing the optical pickup 13 from jumping out to the outer peripheral portion of the optical disk during the seek operation. It is thought that it is possible.

Therefore, when the lead-out area is to be written near the innermost circumference of the disk, assuming that the writing time of the lead-out area is 30 seconds, how long the radial width of the lead-out area is Was calculated as follows.

That is, since the linear velocity of the optical disk 1 during recording and reproduction is 1.2 m / s and there are 75 subcode frames per second, the number of subcode frames per second is calculated from the linear velocity. , The length in the track direction per subcode frame is 16 mm. If the lead-out area is written at a position of φ50 mm, the number of frames per disc rotation in this lead-out area is 50 mm × π, which is the length of the subcode frame (16 m
m), which is approximately 9.817 frames. When the writing time is 30 seconds, the number of subcode frames is 30 seconds × 75 frames, which is 2250 frames. Therefore, it can be seen that the width of this lead-out area in the disk radial direction is 366.7 μm from 2250 frames ÷ 9.817 frames × 1.6 μm.

This result shows that the width of the lead-out area can be ensured by about 2.4 times the width of the moving resolution of the thread section 19 of 150 μm. Therefore,
By writing the lead-out area in an absolute time of 30 seconds or more, it can be said that a stable recording / reproducing operation can be performed.

Also, when writing in the lead-out area is performed with a writing time exceeding 60 seconds, the width of the lead-out area becomes unnecessarily large, and the program area can be sufficiently expanded and secured. It will be difficult. Therefore, the write time of the lead-out area is
It is desirable to set it for 30 seconds to 60 seconds.

Further, in the information recording apparatus 1 according to the present invention,
Based on the result of discriminating the storage density of the optical disk on which the writing is performed, the writing position of the lead-in area is φ46 mm to φ50 mm, φ45.2 between the existing optical disk and the optical disk 1 with the increased recording density.
It is desirable to control each unit by the control unit 19 so as to be in the range of mm to φ48 mm. As a result, the program area of the optical recording medium 1 having a higher recording density is expanded, and together with the improvement in the recording density as compared with an existing optical disc,
It is possible to further increase the capacity. Also,
The start position of the lead-in area on the optical disc 1 is represented by C
By setting a position different from that of an existing optical disc such as a D-R or a CD-RW, it is possible to determine the existing optical disc at the time of reproduction using this difference in the start position.

Further, in the information recording apparatus 1 according to the present invention, the lead-out area between the existing optical disc and the high-density optical disc 1 is determined based on the result of discriminating the storage density of the optical disc to be written. Are writing positions of φ116 mm to φ118 mm, respectively.
The control unit 19 is controlled so as to be φ116 mm to φ118 mm.
It is desirable to control each part according to. This allows
The program area of the optical recording medium 1 having a higher recording density is expanded, and it is possible to realize a further increase in capacity in addition to an increase in recording density as compared with an existing optical disc. Also, by setting the start position of the lead-out area on the optical disk 1 to a position different from that of an existing optical disk such as a CD-R or a CD-RW, the difference in the start position is used to reproduce an existing optical disk. Can be determined.

[0087]

As described above, in the information recording apparatus according to the present invention, the recording area can be set according to the recording density of the optical recording medium determined by the determining means. And an optical recording medium having a higher recording density than the existing optical recording medium, and can write respective areas such as a lead-in area, a program area, and a lead-out area at optimal positions. .
Therefore, it is easy to perform stable and reliable recording on both the standardized existing optical recording medium and the optical recording medium adapted for high recording density.

According to the information recording method of the present invention, recording can be performed in the recording step according to the recording density of the optical recording medium determined in the determining step. Each area such as a lead-in area, a program area, and a lead-out area can be written at an optimum position on an optical recording medium having a higher recording density than that of the optical recording medium. Therefore, it is easy to perform stable and reliable recording on both the standardized existing optical recording medium and the optical recording medium adapted for high recording density.

Further, in the optical recording medium according to the present invention, the modulation / demodulation method of the information signal and the modulation / demodulation method of the wobble signal are the same as the modulation / demodulation method of the existing optical recording medium. It is easy to ensure compatibility with the medium, and the radial width of the lead-out area is 30 seconds to 60 seconds,
A larger capacity can be realized by enlarging the program area. Therefore, it is possible to achieve high recording density and increase the storage capacity while maintaining compatibility with the standardized existing optical recording medium.

In the optical recording medium according to the present invention, the modulation / demodulation method of the information signal and the modulation / demodulation method of the wobble signal are the same as the modulation / demodulation method of the existing optical recording medium. It is easy to ensure compatibility with the medium. The lead-in area is φ4
The position is set at 5.2 mm to 48 mm, and this position is the same as a standardized optical recording medium such as a conventional DVD. It is easy to divert a recording / reproducing device that performs recording / reproducing to the device. Therefore, while maintaining compatibility with existing standardized optical recording media,
Higher recording density can be achieved and the storage capacity can be increased.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing an example of an optical disk to which the present invention has been applied.

FIG. 2 is an enlarged sectional view of a main part showing a laminated structure of the optical disc.

FIG. 3 is an enlarged perspective view of a main part showing a pre-groove included in the optical disc.

FIG. 4 is a schematic diagram showing a frame structure of ATIP information recorded on the optical disc.

FIG. 5 is a schematic diagram showing a pattern of a synchronization signal SYNC in an existing standardized optical disc.

FIG. 6 is a schematic diagram showing a pattern of a synchronization signal SYNC in an optical disc having a high recording density by applying the present invention.

FIG. 7 is a schematic diagram showing a recording area on an existing standardized optical disc.

FIG. 8 is a schematic diagram showing a recording area in an optical disc having a high recording density by applying the present invention.

FIG. 9 is a schematic configuration diagram illustrating an example of an information recording apparatus to which the present invention has been applied.

FIG. 10 is a flowchart showing an example of an operation in the information recording apparatus.

[Explanation of symbols]

1 optical disk, 2 disk substrate, 3 signal recording layer,
4 protective layer, 5 pregrooves, 6 lands, 10 information recording device, 11 spindle motor unit, 13 optical pickup, 14 RF amplifier unit, 15 clock generation / servo control unit, 16 ATIP decoder, 18 data processing unit, 19 thread unit , 20 control unit

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tetsuji Kawashima 6-7-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation (72) Inventor Kenji Nagashima 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo No. within Sony Corporation (72) Inventor Eiji Kumagai 6-35 Kitashinagawa, Shinagawa-ku, Tokyo F-term within Sony Corporation (reference) 5D090 AA01 BB03 CC14 DD03 FF11 FF31 GG17 GG27

Claims (17)

[Claims] 1. An information recording apparatus for recording an information signal on a disk-shaped optical recording medium along a recording track, comprising: a rotation driving means for rotationally driving the optical recording medium; and a diameter of the optical recording medium. Recording means for recording on the optical recording medium, the recording means being capable of moving in the direction, a discriminating means for discriminating the recording density of the optical recording medium, and a discriminating means for discriminating the discriminating means. An information recording apparatus comprising: a control unit that regulates both radial end positions in at least one of a lead-in area, a program area, and a lead-out area to be written. 2. The recording apparatus according to claim 1, wherein the discriminating unit determines a recording density of the optical recording medium based on a wobble signal recorded on a pregroove formed along a recording track of the optical recording medium. The information recording apparatus according to claim 1, wherein 3. The control device according to claim 1, wherein the control unit controls a writing time of a lead-out area in each session to be written by the recording unit, thereby restricting radially opposite end positions in the lead-out area. 2. The information recording device according to 1. 4. The recording means, when performing recording on an existing standardized optical recording medium, writes the lead-out area of each session in a writing time based on the standard. By controlling, the position of both ends of the lead-out area is regulated, and an optical recording medium having a higher recording density N times (N is a positive number larger than 1) than the existing optical recording medium is used. When performing recording, the recording means is controlled so as to write the lead-out area of each session with a writing time N times as long as that of the existing optical recording medium. 4. The information recording apparatus according to claim 3, wherein the information recording device is controlled. 5. The recording device according to claim 1, wherein when performing recording on an existing standardized optical recording medium, the recording device controls the recording device such that at least a writing time of the lead-out area in the first session is 90 seconds. By controlling the position of both ends of the lead-out area by controlling, when recording is performed on an optical recording medium having a higher recording density than the existing optical recording medium, at least the lead-out in the first session is performed. Area write time is 30
4. The information recording apparatus according to claim 3, wherein the recording means is controlled so as to be in a range of seconds to 60 seconds, thereby controlling both end positions of the lead-out area. 6. The recording device according to claim 1, wherein, when performing recording on an existing standardized optical recording medium, the radial writing position of the lead-in area is φ4.
The recording means is controlled so as to be 6 mm to 50 mm, and when recording is performed on an optical recording medium having a higher recording density than the existing optical recording medium, the radial writing of the lead-in area is performed. 2. An information recording apparatus according to claim 1, wherein said recording means is controlled so that the position is between φ45.2 mm and φ48 mm. 7. The recording device according to claim 1, wherein when performing recording on an existing standardized optical recording medium, the radial writing position of the lead-out area is φ
The recording means is controlled so as to be 116 mm to 118 mm, and when recording is performed on an optical recording medium having a higher recording density than the existing optical recording medium, writing in the radial direction of the lead-out area is performed. Position is φ116mm ~ φ118mm
2. The information recording apparatus according to claim 1, wherein said recording means is controlled so as to satisfy the following. 8. An information recording method for recording an information signal on a disk-shaped optical recording medium along a recording track, wherein: a discriminating step of discriminating a recording density of the optical recording medium; According to the result, there is provided a recording step of regulating both end positions in a radial direction in at least one of a lead-in area, a program area, and a lead-out area to be written on the optical recording medium. Information recording method. 9. The recording method according to claim 1, wherein the determining step determines the recording density of the optical recording medium based on a wobble signal recorded on a pregroove formed along a recording track of the optical recording medium. The information recording method according to claim 8, wherein 10. The information according to claim 8, wherein in the recording step, the position of both ends in the radial direction in the lead-out area is controlled by controlling a writing time of the lead-out area in each session. Recording method. 11. In the recording step, when recording is performed on an existing standardized optical recording medium, the lead-out area of each session is written in a write time based on the standard, thereby reading the read-out area. In addition to restricting the positions of both ends of the OUT area and performing recording on an optical recording medium having a higher recording density N times (N is a positive number greater than 1) than the existing optical recording medium, 11. The information recording according to claim 10, wherein the position of both ends of the lead-out area is regulated by writing the lead-out area of each session with a writing time N times longer than that of the existing optical recording medium. Method. 12. In the recording step, when recording is performed on an existing standardized optical recording medium, at least the writing time of the lead-out area in the first session is set to 90 seconds, so that In addition to restricting the positions of both ends of the read-out area and performing recording on an optical recording medium having a higher recording density than the existing optical recording medium, at least the writing time of the lead-out area in the first session is reduced by 30.
11. The information recording method according to claim 10, wherein the position of both ends of the lead-out area is controlled by setting the time to seconds to 60 seconds. 13. In the recording step, when recording is performed on a standardized existing optical recording medium, the radial writing position of the lead-in area is set to φ4.
When recording is performed on an optical recording medium having a higher recording density than the existing optical recording medium, the writing position in the radial direction of the lead-in area is set to 45.2 mm to φ48 mm. 9. The information recording method according to claim 8, wherein the information is recorded. 14. In the recording step, when recording is performed on an existing standardized optical recording medium, the radial write position of the lead-out area is set to φ.
When recording on an optical recording medium having a higher recording density than the existing optical recording medium, the writing position in the radial direction of the lead-out area is set to φ116 mm to φ118 mm.
9. The information recording method according to claim 8, wherein: 15. An information signal modulation / demodulation method for recording and / or reproducing information on and / or from a recording track in a disc-shaped optical recording medium on which information signals are recorded and / or reproduced along the recording track. While the modulation and demodulation method of the wobble signal recorded in the pre-groove formed along the same as the modulation and demodulation method in the existing optical recording medium, the recording density is higher than that of the existing optical recording medium, An optical recording medium characterized in that the radial width of the lead-out area in the first session is 30 seconds to 60 seconds in absolute time included in the wobble signal. 16. A disc-shaped optical recording medium on which information signals are recorded and / or reproduced along a recording track, wherein a modulation / demodulation method of the information signal for recording and / or reproducing the recording track and the recording track are provided. The modulation density of the wobble signal recorded on the pre-groove formed along is the same as the modulation and demodulation method of the existing optical recording medium, and the recording density is higher than that of the existing optical recording medium. An optical recording medium, wherein an in area is set at a position of φ45.2 mm to φ48 mm, and a lead-out area is set at a position of φ116 mm to φ118 mm. 17. The optical recording medium according to claim 16, wherein a start position of the lead-in area and a maximum start position of the lead-out area are recorded in the wobble signal.