JP2002245623A - Playing-back method and recording method of recording medium, and playback device and recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably detect the address information recording area without reproducing the address information at the time of starting the recording/playing-back operation in a recordable optical disk whereon a center line of the address information recording area recorded in a pit column is arranged to be the same as a center line of a track of the user's data recording area. SOLUTION: At the time of playing-back the disk, a detecting signal of the address information recording area is produced by detecting that amplitudes equal to or larger than the certain threshold are outputted in the plural number of times by a tangential push-pull signal. Also, the change of the DC level in an envelope signal of a reproduced RF signal or an average value signal of the reproduced RF signal is detected, then the detecting signal of the address information recording area is produced from the timing of the above change.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reproducing method and a recording method for a recording medium, a reproducing apparatus and a recording apparatus, and more particularly, to detecting an address information recording area of an optical disk having an address information recording area and a user data recording area. The present invention relates to a reproducing method and a recording method of an optical disc for reproducing or recording, and a reproducing apparatus and a recording apparatus.

[0002]

2. Description of the Related Art In recent years, as rewritable optical disks,
Various media such as CD-R / RW, DVD-RAM, and DVD-R / RW have appeared on the market. In these discs, address information serving as position information when data is recorded is previously recorded on the disc, and user data is recorded on the disc using the address information. Various methods have been proposed for recording address information. Of which, DV
In a D-RAM disk, both land and groove areas adjacent to each other are used as a reproduction area and a recording area.
As shown in (a), address information used for reproduction and recording is arranged as a pair of staggered pit rows with respect to the track center of the land and groove (CAPA: Complementary Allocated).
Pit Address method). In the figure, 201 is a land area, 202
Indicates a groove area, 803 and 804 indicate address information recording areas, and 206 indicates a light spot. 803 records the address information of the subsequent groove area, and 804 records the address information of the subsequent land area.

In the address information of the DVD-RAM, not only the position information on the disk but also the polarity information of the tracking error signal in the land and the groove are recorded.
Therefore, when recording data on the disk and reproducing data from the disk, it is important to first detect the address information recording area.

[0004] Detection of an address information recording area during reproduction of a DVD-RAM disc is performed by a push-pull method.
FIG. 5 shows a conventional example of a circuit for detecting an address information recording area. Laser light emitted from a laser (not shown) is reflected by a disk (not shown) to form a far-field image 302 on the photoelectric conversion element 301. The photoelectric conversion element 301 is divided into two by a dividing line perpendicular to the radial direction, and a push-pull signal is generated by the low-pass filters 303 and 304 and the subtraction circuit 305 at the subsequent stage. Push-pull signal 311 to comparator 30
By comparing with the reference voltage Vth by 6 and 307, detection signals 309 and 310 of the address information recording area are obtained.

FIG. 6 shows waveforms of respective parts of the circuit of FIG. 5 when reproducing the address information recording area. The figure is for groove reproduction. When the light spot passes through the groove area, a wobble signal recorded in the groove is output from the push-pull signal output 311. This signal is used to generate a reference clock signal when recording user data. The wobble amplitude on the disk is at most 20 nm, while the track pitch is 0.74 μm for a 2.6 GB disk and 0.615 μm for a 4.7 GB disk. As shown in FIG. 6, in the address information recording area, the pits of the address information recording area are recorded with a 1/2 track shift from the track center of the groove. Large enough for. for that reason,
During reproduction of the address information recording area, the amplitude of the push-pull signal output 311 increases according to the track fluctuation amount. By comparing this waveform with reference voltages 312 and 313, an address information recording area can be detected as shown by signals 309 and 310. Further, since the address information is recorded so as to form a pair with the track, the push-pull signal in the address information recording area is positively or negatively generated as shown in FIG. Therefore, a negative reference voltage is generated by the inverter 308, and the address information recording area corresponding to the negative push-pull signal is also detected.

As a method of detecting the address information recording area, a method is known in which a special pattern is recorded at the head of the address information, and the address information recording area is detected by the special pattern during reproduction and recording. . In this method, the center line of the pit row in the address information recording area is
This disk is used for a disk recorded on the same line as the center line of the land and the center line of the groove in the user data recording area, for example, an MO disk (hereinafter referred to as “MO”). In this case, a reference clock for detecting the special pattern is required in advance. The MO divides the disc into several zones and controls the rotation so that the rotation speed is constant within each zone (Z-CAV: Zoned Constant Angular Ve
locus), and the special pattern of the zone is detected using a reference clock determined for each zone.

Since the period of the wobble signal between the sectors from the address information recording area to the next address information recording area is constant, once the address information is obtained, the next address information recording area transmits the wobble signal. It can be detected by counting.

The method of detecting the address information recording area is described in Japanese Patent Application Laid-Open No. H11-25605 and "NIKKEI ELECT
RONICS 1997.10.20 (no.701) ".

[0009]

When an address information recording area is detected from a pattern recorded on a disk as in a conventional MO, a zone is previously set separately from the detection of the address information recording area in order to determine a reference clock. It needs to be detected. The zone can be detected based on, for example, the radius of the disk. However, it is necessary to generate a clock for identifying a special pattern, so that the circuit configuration may be complicated.

On a disc such as an MO, in which the center line of the pit row in the address information recording area is aligned with the center line of the land and the center line of the groove, the reproduction time of the address information recording area is reduced. However, the push-pull signal described in the conventional example is not detected. Therefore, the address information recording area cannot be detected by the push-pull signal shown in the conventional example.

As a method for solving these problems, as disclosed in Japanese Patent Application Laid-Open No. H11-345425, the reflected light from the disk is tracked to the disk in which the address information recording area is arranged as described above. A method has been proposed in which the area is divided into two in a direction perpendicular to the direction, and an area where the difference in the intensity of the reflected light is equal to or greater than a predetermined value is detected as an address information recording area. However, when the intensity difference signal is used, if the S / N of the signal is reduced due to the material of the medium and the shortening of the wavelength of the laser for increasing the capacity of the disk, the address information recording area may be erroneously detected. is there.

Therefore, according to the present invention, in a recording medium, particularly an optical disk in which the center line of a pit row in an address information recording area is arranged on the same line as the center line of a land and the center line of a groove in a user data recording area, Provided are a reproducing method and a recording method for a recording medium such as an optical disk, and a reproducing apparatus and a recording apparatus for a recording medium such as an optical disk, for performing stable detection of an address information recording area without using the same.

[0013]

According to the first method of reproducing and recording a recording medium such as an optical disk according to the present invention, a tangential signal is obtained from a signal obtained by irradiating an optical disk recorded by means such as phase change with a light beam. An initial push-pull signal is generated, and an address information recording area is detected by detecting that the signal amplitude is equal to or more than a predetermined value a plurality of times.

According to the second method of reproducing and recording a recording medium such as an optical disk according to the present invention, an envelope signal of a reproduction signal obtained by irradiating an optical disk with a light beam is generated, and address information recorded in advance by pits is recorded. The address information recording area on the optical disc is detected by detecting the difference between the DC level of the signal in the area and the user data recording area recorded by means such as phase change.

According to the third method of reproducing and recording a recording medium such as an optical disk of the present invention, an amplitude average signal of a reproduced signal obtained by irradiating a light beam to an optical disk is generated, and address information recorded in advance by pits is generated. A recording area;
By detecting the difference in DC level of the signal in the user data recording area recorded by means such as phase change,
An address information recording area on the optical disk is detected.

The optical disk device of the present invention has a configuration that enables the first to third optical disk reproducing methods and recording methods.

[0017]

FIG. 1 is a circuit block diagram of a circuit for detecting an address information recording area in a first embodiment of the present invention. FIG. 2 shows the vicinity of the address information recording area of a recording medium such as an optical disk arranged such that the center line of the pit row in the address information recording area is aligned with the center line of the land and the center line of the groove in the user data recording area. FIG. Here, as an example of the address information recording area, an area in which a physical address or the like is recorded by a pit row is
As an example of the user data recording area, an area recorded by a change in reflectance such as a phase change will be described. The information recorded in the address information recording area may be information other than address information such as a physical address.

In FIG. 2, reference numeral 201 denotes a groove area where user data is recorded, 202 denotes a land area where user data is recorded, and 203 denotes an address information recording area by pits. The lower part of FIG. 2 shows an enlarged view of the switching section between the user data recording area and the address information recording area. 20
4 indicates a pit in the address information recording area, and 205 indicates mark recording due to a phase change in the user data recording area. Also,
Reference numeral 206 denotes a laser light spot.

Hereinafter, the operation of detecting the address information recording area in this embodiment will be described with reference to FIGS.

A laser beam emitted from a laser light source (not shown in FIG. 1) is reflected by a disk (not shown) to form a far-field image 102 on a photoelectric conversion element 101 as a detector. The photoelectric conversion element 101 is divided into a first region and a second region substantially along the tangential direction by a radial dividing line (a line perpendicular to the tangential direction) of the disk. In the area and the second area, reflected light of the laser light from the recording medium is detected. Then, signals 103 and 10 output from the photoelectric conversion element 101
4 is subtracted by the subtractor 120 to generate a tangential push-pull signal 105. That is, the signal generation circuit having such a circuit configuration uses the tangential push-pull signal 10 based on the difference between the intensity of the reflected light detected in the first area and the intensity of the reflected light detected in the second area.
5 is generated.

FIG. 4 shows a case where the pit depth is, for example, λ / 6.
FIG. 3 shows the waveforms of the respective parts in FIG. 1 when the area 2 is reproduced.
Shown in The upper part of FIG. 3 shows a switching section between the user data recording area and the address information recording area on the recording medium shown in the lower part of FIG. 2, and the lower part of FIG. FIG. 2 shows output waveforms of various parts in the circuit block of FIG. 1 when the operation proceeds.

At the time of reproducing and recording the address information recording area by the pits 204, the amplitude of the tangential push-pull signal 105 increases due to the diffraction of the laser light by the pits. This amplitude is sufficiently larger than the amplitude of the tangential push-pull signal by the mark 205 made of the phase change medium as shown in FIG. Thus, the reference voltage Vth0, which is the detection threshold, is set as shown at 108 and 109 in FIG. 3, and the tangential push-pull signal is compared with Vth0 using the comparators 106 and 110. By taking the logical sum of the outputs 111 and 112 of the comparator, a detection signal 114 of the address information recording area is obtained. That is, the detection signal 114 is output by comparing the tangential push-pull signal with a predetermined reference voltage. Note that the inverter 130 generates a negative reference voltage so that the address information recording area corresponding to the tangential push-pull signal of the negative polarity can also be detected. By detecting the rising edge or the falling edge or both the rising and falling edges of the pulses corresponding to 401 and 402 in FIG. 3 in the detection signal 114 output by the detection circuit having such a circuit configuration, the address of the disk is detected. An information recording area can be detected. With the above method, it is possible to detect the address information recording area.

However, if the S / N of the tangential push-pull signal is reduced due to the material of the medium, the shortening of the laser wavelength for higher density, and the jumping in of noise, the stable address information recording area can be obtained. Detection may not be possible. For example, it is conceivable that in the user data recording area, the amplitude of the tangential push-pull signal temporarily increases due to a noise jump or the like, and the detection signal 114 is erroneously output. Hereinafter, a method for enabling stable detection of the address information recording area will be described.

An edge counter (counting circuit) 11 for counting the number of times the detection signal 114 is output at a subsequent stage of the detection signal 114
Prepare 5 The edge counter 115 counts the edges of the detection signal 114 an arbitrary number of times and outputs a detection confirmation signal 116. That is, the edge counter 115 inputs the detection signal 114 to the edge counter 115, and counts the number of edges, thereby counting the number of times the detection signal 114 is output.
The edge to be counted may be a rising edge, a falling edge, or both rising and falling edges. The edge counter 115 counts an arbitrary number of externally set edges in the count period 1001, and counts a predetermined number or more of edges, that is, the number of times the detection signal 114 is output becomes the predetermined number of times. When it reaches, a detection confirmation signal 116 is output.

In the address information recording area, an edge is detected a plurality of times in a short time. On the other hand, in the user data recording area, only an edge of a signal which occurs sporadically due to noise or the like is detected. The number of times of edge detection is different between the address information recording area and the user data recording area. Therefore, when the number of times of detection of the edge detected within a certain time is counted, and when the number of times the detection signal 114 is output reaches a predetermined number, the detection confirmation signal 116 is output and the address information recording area is detected. This enables stable detection of the address information recording area even when the S / N of the tangential push-pull signal is reduced due to the medium material, shortening of the laser wavelength for higher density, and noise ingress. It can be.

The value of the edge counter is reset at regular intervals so that it can be prepared for the detection of the next address information recording area. Edge counter 11
5, the threshold value of the number of edge detections when outputting the detection confirmation signal 116 is sufficient for avoiding erroneous detection of the address information recording area due to the medium material, shortening of the wavelength of the laser, jumping of noise, etc. It is desirable that the number of recording areas be sufficient to prevent detection omission.

In this embodiment, the method of counting the edges of the detection signal 114 has been described in order to enable stable detection of the address information recording area. However, the detection signal 114 may be high or low. For example, a method of counting the number of times of occurrence may be considered, and the present invention is not limited to the above example.

In the present embodiment, the amplitude of the tangential push-pull signal in the address information recording area is larger than that in the user data recording area. It changes depending on the factors, and is not limited to the magnitude relation in the present embodiment.

In this embodiment, both positive and negative amplitudes of the tangential push-pull signal are detected. However, the same effect can be obtained by detecting the amplitude only in the positive direction or only in the negative direction.
It is not limited to the above example.

In this embodiment, the method of detecting the address information recording area using the tangential push-pull signal has been described. However, the detection is performed in the first area and the second area substantially along the tangential direction. The signal to be used is not limited to the tangential push-pull signal as long as the signal is generated based on the difference from the intensity of the reflected light, and another signal may be used.

Next, a second embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG. FIG. 7 is a circuit block diagram of a circuit for detecting an address information recording area in the second embodiment of the present invention. In the figure, 1101 is an optical disk, 1102 is a pickup, 1104 is a peak hold circuit (envelope signal detection circuit), and 1106 is a comparator. FIG. 8 shows an example of the peak hold circuit 1104. Reference numeral 1202 in FIG. 8 is a current source for operating the transistor 1201. Peak hold circuit 11
In 04, the output signal 1105 charges and discharges the capacitor 1203, thereby realizing the peak hold operation.

The upper part of FIG. 9 is a view near the address information recording area on the optical disk, similarly to the upper part of FIG. The lower part of FIG. 9 shows the waveform of each part in the circuit block of FIG. 7 when the light spot 206 is displaced in the direction of the arrow in the upper part of FIG.

Hereinafter, the operation of detecting the address information recording area in this embodiment will be described. Light spot on the optical disk 1101 by the laser light emitted from the pickup 1102
206 is formed. When the spot is displaced on the groove in the direction of the arrow by the rotation of the disc, the pickup
From 1102, an RF signal which is a reproduction signal shown in 1103 is output. The DC level of the RF signal 1103 is lowered with respect to the address information recording area recorded by the pit due to the fact that the user data recording area is a mark recording due to a phase change instead of a pit, and diffraction due to a groove in a land or a groove. . Therefore, the top envelope signal 1105 of the RF signal 1103 obtained by the peak hold circuit 1104 has a difference in DC level between the user data recording area and the address information recording area. Therefore, the top envelope signal 1105
And a threshold voltage Vth1 set from the outside, a detection signal of the address information recording area shown by 1107 can be obtained.

In the present embodiment, the top envelope signal is used for detecting the DC level of the RF signal. However, a method using a bottom envelope signal can be considered, and the present invention is not limited to the above embodiment. Also, it is sufficient for the envelope signal detection circuit to be able to detect the envelope signal, and various circuit configurations other than FIG. 8 are conceivable, and are not limited to the above embodiment.

Next, a third embodiment of the present invention will be described with reference to FIGS. FIG. 10 is a circuit block diagram of a circuit for detecting an address information recording area in the third embodiment of the present invention. In the figure, blocks having the same functions as those in FIG. 7 are denoted by the same symbols, and description thereof will be omitted. Reference numeral 1501 in FIG. 10 denotes a low-pass filter (average signal detection circuit) realized by a resistor, a capacitor, and the like, and 1504 denotes a comparator.

The upper part of FIG. 11 is a view near the address information recording area on the optical disk, similarly to the upper part of FIG. The lower part of FIG. 11 shows the waveform of each part in the circuit block of FIG. 10 when the light spot 206 is displaced in the direction of the arrow in the upper part of FIG.

The operation of detecting the address information recording area in this embodiment will be described below. The operation up to the point where the RF signal 1103 is output is the same as the operation in the second embodiment of the present invention, and the description is omitted here. The output reproduced RF signal 1103 is input to a low-pass filter circuit 1501 having a sufficiently low pass band with respect to the signal band, and the RF signal 1103 is output.
An average value signal 1502 indicating the amplitude center of 03 is obtained. The average value signal 1502 has a difference in DC level between the user data recording area and the address information recording area as in the second embodiment.
Therefore, by comparing the average value signal 1502 with the threshold voltage Vth2 set from the outside, the detection timing signal of the address information recording area shown by 1506 can be obtained.

In the above embodiment, a low-pass filter is used in the average signal detection circuit. However, the average value signal detection circuit is not limited to the above embodiment as long as the average voltage of the RF signal amplitude can be detected.

In the above second and third embodiments,
The DC level of the RF signal in the address information recording area is higher than that in the user data recording area, but this is determined by the recording shape of the user data recording area and address information recording area and the properties of the recording film on the disc. Yes, the relationship is not always at the DC level as shown in the embodiment. The present invention is not limited to the above embodiment, since an effect can be obtained if there is a significant difference in the DC level of the RF signal between the user data recording area and the address information recording area. Therefore, the signals that can be used for detecting the address information recording area are not limited to the envelope signal and the average signal. In the second embodiment and the third embodiment,
Although the method using the RF signal has been described, other signals may be used as long as the signal is not limited to the RF signal and is a reproduction signal obtained when reproducing the disk.

In each of the first to third embodiments, the recording medium is such that the center line of the pit row in the address information recording area is aligned with the center line of the land and the center line of the groove in the user data recording area. The optical disk is used for recording the address information even when the address information is recorded adjacently on the adjacent track, or when the user data is recorded only on the land or only the groove. The method for detecting the recording area can obtain the same effects as those of the first to third embodiments, and is not limited to the above embodiment. That is, the center line of the pit train in the address information recording area is described as an example of a disc in which the center line of the land and the center line of the groove are recorded in the user data recording area. The present invention can be applied not only to a simple disk but also to other disks. For example,
Only a land or a groove is used as a user data recording area, and a disc provided with an address information recording area on the same line as a center line of a land or a center line of a groove used as the user data recording area, or both a land and a groove are used. The present invention can be applied to a disk or the like which is used as a user data recording area and has an address information recording area provided on a boundary between a land and a groove.

In the first to third embodiments, for example, an ISOM (International Symposium on Optic)
al Memory) 2000 Technical Digest, "FOR
MATDESCRIPTION AND EVALUATION OF THE 22.5GB DVR DI
For a format in which a mirror area is provided at the head of the address information recording area shown in "SC", the address information recording area can be detected without the need for the mirror area. Can be.

Next, a sequence in which the address information recording area detection of the present invention is used will be described with reference to FIGS. FIG. 12 shows an example of a system configuration of an optical disk device using the present invention. FIG. 13 shows an example of a reproduction operation flow and a recording operation flow using the present invention.

The disk 1401 is mounted on the apparatus (ST130).
1) Turn on the laser light source of the pickup 1403 (ST1
302), and discrimination of the disc is performed (ST1303). If the disk is a disk with an address information recording area,
If it is determined in 1409, the circuit 1407 for detecting the address information recording area starts operating. Next, the focus servo is turned on (ST1304), and the rotation of the spindle motor 1402 is turned on (ST1305). Next, turn on the tracking servo (ST
1306), the address information recording area is detected (ST1307).
(The order of ST1306 and ST1307 may be reversed.) The microcomputer 1409 confirms that the reproduction area is the address information recording area.
Then, the PLL circuit 1408 is turned on to generate a synchronous clock for the output waveforms of the waveform equalization circuit 1404 and the waveform shaping circuit 1405 (ST1308). When a synchronous clock is obtained, address information is reproduced by the demodulation circuit 1406, necessary data is reproduced (ST1309), and data is reproduced or recorded (ST1310). At the time of data recording, the address information recording area is reproduced to detect the target address information (physical address, etc.), and the recording signal obtained by the modulation circuit 1410 drives the laser drive circuit 1411 to record the information. I do.

When the address information is detected, the position of the next address information recording area is predicted from the wobble signal count of the disk. The prediction of the position of the address information recording area can be dealt with by detecting the address information recording area for each piece of address information when no wobble signal is recorded on the disc.

[0045]

In the optical disk reproducing / recording method of the present invention and the optical disk apparatus using the method, the center line of the pit row in the address information recording area is the same as the center line of the land and the center line of the groove in the user data recording area. For a disk or the like arranged on the line, an address information recording area is detected by a tangential push-pull signal, an envelope signal detected from a reproduction signal, or an average signal. This eliminates the need for zone detection for clock generation when detecting sector data or the like in address data, and can reduce the complexity of a circuit for detecting an address information recording area. In addition, when the above signal is used, since a four-division photodetector used in generation of a conventional astigmatism signal that outputs an RF signal, a push-pull signal, and the like, and a photodetector of the applied form can be used, the conventional method is used. On the other hand, a signal can be generated only by a simple circuit change or the like without changing the structure of the optical system and other detection systems.

[Brief description of the drawings]

FIG. 1 is a circuit block diagram of a circuit for detecting an address information recording area in a first embodiment of the present invention.

FIG. 2 is a diagram around an address information recording area on an optical disc.

FIG. 3 is a view showing waveforms of respective parts of the circuit of FIG. 1 when the area of FIG. 2 is reproduced by the circuit of FIG. 1;

FIG. 4 is a view near an address information recording area in a DVD-RAM disk.

FIG. 5 is a diagram showing a conventional example of a detection circuit for detecting an address information recording area when reproducing a DVD-RAM disk.

FIG. 6 is a view showing waveforms of respective parts of the circuit of FIG. 5 when the area of FIG. 4 is reproduced by the circuit of FIG. 5;

FIG. 7 is a circuit block diagram of a circuit for detecting an address information recording area in a second embodiment of the present invention.

FIG. 8 is a circuit diagram illustrating an example of a peak hold circuit.

9 is a diagram showing waveforms of respective parts of the circuit of FIG. 7 when the area of FIG. 2 is reproduced by the circuit of FIG. 7;

FIG. 10 is a circuit block diagram of a circuit for detecting an address information recording area according to a third embodiment of the present invention.

11 is a diagram showing waveforms of respective parts of the circuit of FIG. 10 when the area of FIG. 2 is reproduced by the circuit of FIG. 10;

FIG. 12 is a diagram showing a system configuration of an optical disk device using the present invention.

FIG. 13 is a diagram showing a reproduction flow of an optical disk device using the present invention.

[Explanation of symbols]

101: photodetector, 102: far-field image, 106, 11
0, 1106, 1504 ... Comparator, 113 ... OR
Circuit, 115: edge counter, 120: subtraction circuit, 1
Reference numeral 30: inverter, 201: groove area, 202: land area, 203: address information recording area, 204: pit, 205: mark, 206: light spot, 303,
304, 1501 ... low-pass filter circuit, 1101 ...
Optical disc, 1102 ... pickup, 1104 ... peak hold circuit, 1201 ... transistor, 1202 ...
Current source, 1203 ... capacitor.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Manabu Katsuki, 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture F-term in the Digital Media Development Division, Hitachi, Ltd. 5D090 AA01 BB04 CC01 CC04 CC14 DD03 DD05 FF02 FF15 GG03 GG16 GG28 LL05

Claims (24)

[Claims] 1. A recording medium reproducing apparatus for reproducing a recording medium having an address information recording area and a user data recording area, comprising: a laser light source for irradiating the recording medium with laser light; In the first region and the second region along the direction, a detector that detects the reflected light of the laser light, and the reflected light detected in the first region and the detected light in the second region A signal generation circuit that generates a tangential push-pull signal from the reflected light; a detection circuit that outputs a detection signal of an address information recording area of the recording medium using the tangential push-pull signal; Count the number of times the detection signal is output, when the number of times the detection signal of the address information recording area is output reaches a predetermined number, Recording medium reproducing apparatus characterized by comprising a counting circuit for outputting a detection confirmation signal dress information recording area. 2. The recording medium reproducing apparatus according to claim 1, wherein said detector is divided into said first area and said second area by a line perpendicular to a substantially tangential direction. 3. The tangential push-pull based on a difference between the intensity of reflected light detected in the first area and the intensity of reflected light detected in the second area. The recording medium reproducing device according to claim 1, wherein the recording medium reproducing device generates a signal. 4. The apparatus according to claim 1, wherein said detection circuit outputs a detection signal of an address information recording area when an amplitude of said tangential push-pull signal is equal to or larger than a predetermined reference value. Recording medium playback device. 5. The counting circuit counts the number of times the detection signal of the address information recording area is output by a rising edge or a falling edge or both rising and falling edges of the detection signal of the address information recording area. 2. The recording medium reproducing apparatus according to claim 1, wherein: 6. A recording medium reproducing apparatus for reproducing a recording medium in which a center line of a pit row in an address information recording area is aligned with a center line of a land and a center line of a groove in a user data recording area. A laser light source that irradiates the recording medium with laser light, and a detector that detects reflected light of the laser light in a first region and a second region along a substantially tangential direction of the recording medium. A signal generation circuit that generates a tangential push-pull signal from the reflected light detected in the first area and the reflected light detected in the second area; and the recording using the tangential push-pull signal. A recording medium reproducing apparatus for detecting an address information recording area of a medium. 7. A recording medium recording apparatus for recording on a recording medium having an address information recording area and a user data recording area, comprising: a laser light source for irradiating the recording medium with laser light; In the first region and the second region along the direction, a detector that detects the reflected light of the laser light, and the reflected light detected in the first region and the detected light in the second region A signal generation circuit that generates a tangential push-pull signal from the reflected light; a detection circuit that outputs a detection signal of an address information recording area of the recording medium using the tangential push-pull signal; Count the number of times the detection signal is output, when the number of times the detection signal of the address information recording area is output reaches a predetermined number, Recording medium recording apparatus characterized by comprising a counting circuit for outputting a detection confirmation signal dress information recording area. 8. The recording medium recording apparatus according to claim 7, wherein said detector is divided into said first area and said second area by a line substantially perpendicular to the tangential direction. 9. The tangential push-pull circuit based on a difference between the intensity of the reflected light detected in the first area and the intensity of the reflected light detected in the second area. The recording medium recording device according to claim 7, wherein the recording medium recording device generates a signal. 10. The apparatus according to claim 7, wherein said detection circuit outputs a detection signal of an address information recording area when an amplitude of said tangential push-pull signal is equal to or larger than a predetermined reference value. Recording medium recording device. 11. The counting circuit counts the number of times the detection signal of the address information recording area is output by a rising edge or a falling edge or both rising and falling edges of the detection signal of the address information recording area. The recording medium recording apparatus according to claim 7, wherein: 12. A recording medium recording apparatus for recording on a recording medium in which a center line of a pit row of an address information recording area is aligned with a center line of a land and a center line of a groove of a user data recording area. A laser light source that irradiates the recording medium with laser light, and a detector that detects reflected light of the laser light in a first region and a second region along a substantially tangential direction of the recording medium. A signal generation circuit that generates a tangential push-pull signal from the reflected light detected in the first area and the reflected light detected in the second area; and the recording using the tangential push-pull signal. A recording medium recording device for detecting an address information recording area of a medium. 13. A recording medium reproducing apparatus for reproducing a recording medium having an address information recording area and a user data recording area, wherein the recording medium is irradiated with a laser beam and reproduced based on the reflected laser beam. A pickup for outputting a signal; and an envelope signal detection circuit for detecting an envelope signal of the reproduction signal, wherein an address information recording area of the recording medium is detected using the envelope signal. apparatus. 14. A recording medium reproducing apparatus for reproducing a recording medium having an address information recording area and a user data recording area, wherein the recording medium is irradiated with a laser beam and reproduced based on the reflected light of the laser beam. A pickup for outputting a signal; and an average signal detection circuit for detecting an average signal of the reproduction signal, wherein an address information recording area of the recording medium is detected using the average signal. Recording medium playback device. 15. A recording medium recording apparatus for recording on a recording medium having an address information recording area and a user data recording area, wherein the recording medium is irradiated with a laser beam and reproduced based on the reflected light of the laser beam. A signal output pickup; and an envelope signal detection circuit for detecting an envelope signal of the reproduction signal, wherein an address information recording area of the recording medium is detected using the envelope signal. apparatus. 16. A recording medium recording apparatus for recording information on a recording medium having an address information recording area and a user data recording area, wherein the recording medium is irradiated with a laser beam and reproduced based on the reflected laser beam. A pickup for outputting a signal; and an average signal detection circuit for detecting an average signal of the reproduction signal, wherein an address information recording area of the recording medium is detected using the average signal. Recording medium recording device. 17. A recording medium reproducing method for reproducing a recording medium having an address information recording area and a user data recording area, comprising irradiating the recording medium with a laser beam, and substantially along a tangential direction of the recording medium. In the first area and the second area, the reflected light of the laser light is detected, and the tangential is calculated from the reflected light detected in the first area and the reflected light detected in the second area. Generating a push-pull signal; outputting a detection signal of an address information recording area of the recording medium using the tangential push-pull signal; counting the number of times the detection signal of the address information recording area is output; When the number of times the detection signal of the information recording area is output reaches a predetermined number, the detection confirmation signal of the address information recording area is output. Recording medium playback method to be. 18. A recording medium reproducing method for reproducing a recording medium in which a center line of a pit row in an address information recording area is aligned with a center line of a land and a center line of a groove in a user data recording area. Irradiating the recording medium with laser light, detecting reflected light of the laser light in a first area and a second area along a substantially tangential direction of the recording medium, Generating a tangential push-pull signal from the reflected light detected in step 2 and the reflected light detected in the second area, and detecting the address information recording area of the recording medium using the tangential push-pull signal. Recording medium reproducing method characterized by the above-mentioned. 19. A recording medium recording method for recording on a recording medium having an address information recording area and a user data recording area, comprising irradiating the recording medium with a laser beam, and substantially along a tangential direction of the recording medium. In the first area and the second area, the reflected light of the laser light is detected, and the tangential is calculated from the reflected light detected in the first area and the reflected light detected in the second area. Generating a push-pull signal; outputting a detection signal of an address information recording area of the recording medium using the tangential push-pull signal; counting the number of times the detection signal of the address information recording area is output; When the number of times the detection signal of the information recording area is output reaches a predetermined number, the detection confirmation signal of the address information recording area is output. Recording medium recording method and. 20. A recording medium recording method for recording on a recording medium in which a center line of a pit row in an address information recording area is aligned with a center line of a land and a center line of a groove in a user data recording area. Irradiating the recording medium with laser light, detecting reflected light of the laser light in a first area and a second area along a substantially tangential direction of the recording medium, Generating a tangential push-pull signal from the reflected light detected in step 2 and the reflected light detected in the second area, and detecting the address information recording area of the recording medium using the tangential push-pull signal. A recording medium recording method, comprising: 21. A recording medium reproducing method for reproducing a recording medium having an address information recording area and a user data recording area, the method comprising: irradiating the recording medium with a laser beam; A recording medium reproducing method, comprising: outputting a reproduction signal based on light; detecting an envelope signal from the reproduction signal; and detecting an address information recording area of the recording medium using the envelope signal. 22. A recording medium reproducing method for reproducing a recording medium having an address information recording area and a user data recording area, the method comprising: irradiating the recording medium with a laser beam; A recording medium reproducing method, comprising: outputting a reproduction signal based on light; detecting an average signal from the reproduction signal; and detecting an address information recording area of the recording medium using the average signal. 23. A recording medium recording method for recording on a recording medium having an address information recording area and a user data recording area, comprising irradiating the recording medium with laser light, and reflecting the laser light irradiated on the recording medium. A recording medium recording method, comprising: outputting a reproduction signal based on light; detecting an envelope signal from the reproduction signal; and detecting an address information recording area of the recording medium using the envelope signal. 24. A recording medium recording method for recording on a recording medium having an address information recording area and a user data recording area, comprising: irradiating the recording medium with a laser beam; and reflecting the laser beam onto the recording medium. A recording medium recording method, comprising: outputting a reproduction signal based on light; detecting an average value signal from the reproduction signal; and detecting an address information recording area of the recording medium using the average value signal.