JP3089497B2 - Recording / reproducing device and reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to relates to, for example, a suitable record reproducing apparatus and a reproducing apparatus applied to a magneto-optical disk.

[0002]

2. Description of the Related Art In a disk-shaped recording medium, a constant rotational speed (CA) for recording / reproducing at a constant rotational speed is used to control the rotational speed when recording / reproducing data.
V) control and constant linear velocity (CLV) control for performing recording / reproduction at a constant linear velocity. Comparing the two types of control, in the case of the constant rotational speed control, the rotational speed is constant because the rotational speed is constant, and the radius control is relatively simple.
Since control data such as a track address can be recorded in a line in the direction, an address search can be easily performed. In the case of constant linear velocity control, it is necessary to change the rotation speed according to the position of the optical pickup, so the speed control system becomes complicated, but since the recording density can be kept constant,
Although the amount of recorded information can be increased compared to the constant rotation speed control, the recording of control data such as track addresses can be reduced by half.
Since it is difficult to perform the alignment in the radial direction, there is a problem that the address search requires time and effort.

Generally, in the case of a magneto-optical disk having a large data recording capacity, in order to easily search for required data, data recording / reproducing is performed by constant rotation speed control in which an address search is easy. Many are made to be performed. However, as described above, there is a disadvantage that the recording capacity is lower in the constant rotation speed control than in the linear velocity constant control, and a zoning recording method has been proposed as a method of increasing the recording capacity in the recording by the constant rotation speed control.

FIG. 1 shows an example of a recording medium (magneto-optical disk) on which the zoning recording is performed. The data recording area of the disk is divided into a zone A near the center of the disk and a zone B near the periphery of the disk. The tracks in each zone are subjected to constant rotation speed control for recording and reproducing at the same rotation speed, and the recording clock rate or the rotation speed is changed between zone A and zone B. By doing so, the recording capacity can be increased.

FIGS. 14 and 15 show that the recording capacity is increased by this zoning recording. FIG. 14 shows an example in which zoning recording is performed by dividing into three zones, and FIG. (In the case of constant control), and shows an example in which data is recorded in pits on a disk. Here, when zoning recording is performed as shown in FIG. 14, the innermost track T1 of each of the zones 1, 2, 3 is set.
1, the recording linear densities of T21 and T31 are set to be the same. Then, in each of the zones 1, 2, and 3, the rotation speed constant control is performed (the clock rate or the rotation speed of the recording data changes when the zone changes), so that the recording linear density decreases as the track becomes closer to the outer periphery. . By dividing into a plurality of zones in this manner, the linear recording density of one track can be returned to the highest state every time the zone changes, and the linear recording density can be maximized as in the case where the zone is not divided as shown in FIG. The recording capacity can be greatly increased as compared with a case where the recording capacity is sequentially reduced to the outer track. That is, the outermost track when the zone is not divided has a very low linear recording density. However, when the outermost track is divided into a plurality of zones, a certain linear recording density is secured even in the outermost track. In this case, the recording capacity can be further increased by increasing the number of zones.

In the case of a magneto-optical disk capable of recording / reproducing various data, not limited to a recording medium on which such zoning recording is performed, data for tracking control or the like is previously recorded on each track. May be provided. That is, in order to enable the optical pickup to accurately trace a track formed on the magneto-optical disk, data is recorded on the track at predetermined intervals by pits, and the data is recorded by the pits during recording or reproduction. Tracking control such as sample servo is performed at the recorded location so that the target track can be accurately traced. in this case,
Recording of address data such as a track number and the like using pits is also performed.

In general, data recorded at such a pit in advance can be recorded at a higher density than when data is recorded by the magneto-optical effect. For this reason, from the viewpoint of effectively utilizing the recording area of the disk, the clock rate of previously recorded data is set higher than the clock rate of data recorded in the area where data is recorded / reproduced by the magneto-optical effect. It is preferable to reduce the area where data is recorded by the pits and increase the area where data can be recorded / reproduced by the magneto-optical effect.

[0008]

However, if data recorded at a plurality of clock rates coexist on one recording medium, there is a problem that the load on the recording apparatus and the reproducing apparatus becomes large. That is, since it is necessary to switch the clock rate depending on the area in which recording and reproduction are performed, the configuration of the recording system and the reproduction system becomes complicated accordingly. In particular, in the case of the zoning recording described above, the clock rate differs in each zone, so that when combined with the clock rate of the pit-recorded portion, data can be recorded on a single disk at a great variety of clock rates. It will be recorded and very complicated control needs to be performed.

[0009] In view of the above points, using a previously area on which data is recorded, a recording medium body and the area in which the recording and reproduction of data can be performed freely are mixed by pits
Recording and reproducing of the data Te is an object to provide a recording and reproducing apparatus and a reproducing apparatus capable easily.

[0010]

SUMMARY OF THE INVENTION The present invention relates to a data reproducing apparatus.
Area and data recordable area are mixed, and data
The clock rate of the data recorded in the live only area,
Clock rate for recording data in data recordable area
Play recorded data from a recording medium that is different from the
In a recording / reproducing device that records and records data,
Clock rate of data recorded in the data-only area
And a clock for recording data in the data recordable area
The clock is a rate that is an integer multiple of the least common multiple of the rate.
Control means for setting the
Recorded in the data playback-only area based on the selected clock
Playback means for playing back the read data, and control means.
Based on the specified clock,
A recording / reproducing apparatus having recording means for recording data;
It is a thing.

The present invention also relates to a data reproduction only area and a data reproduction area.
Data recording area and data playback only area
Clock rate of the data recorded in the
Clock rate of the data recorded in the
Device for reproducing recorded data from a recording medium
In the data recorded in the data playback-only area
Clock rate and data recorded in data recordable area
An integer multiple of the least common multiple of the data clock rate
Control means for setting a clock having a predetermined rate, and control means
Data playback only based on the clock set by
Data recorded in the area and data recorded in the data recordable area
A reproducing means for reproducing both data of the recorded data;
It is provided with a reproducing apparatus.

[0012]

According to the present invention, data is recorded and reproduced by a clock which is an integral multiple of the least common multiple of the clock rate of the data reproduction area and the clock rate of the data recordable area. The recording or reproducing process can be performed with a single clock, and the configuration of the recording and reproducing device can be simplified.

According to the present invention, a clock which is an integral multiple of the least common multiple of the clock rate of the data reproduction-dedicated area and the clock rate of the data recordable area is used.
Since the data is reproduced, the reproduction processing can be performed with a single clock in any area, and the configuration of the reproducing apparatus is simplified.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

In this embodiment, the present invention is applied to a magneto-optical disk capable of freely recording and reproducing data, and zoning recording is performed on the magneto-optical disk as shown in FIG. That is, a plurality of tracks are formed concentrically on one magneto-optical disk, and the two tracks are divided into a zone A formed by a track closer to the center and a zone B formed by a track closer to the outer periphery. In this case, for example, assuming that the size of the magneto-optical disk is 32 mm in radius, the range of zone A is 16 mm to 22 mm, and the range of zone B is 22 mm to 30 mm. In each zone, data is recorded / reproduced at a constant rotation speed. In this example, zoning recording in which the recording density is changed by changing the clock rate of the recording data for each zone is performed.

As shown in FIG. 2, one annular track in each of the zones A and B is composed of 990 segments. In this case, each one-unit segment is composed of 4 bytes of servo bytes and a data area of 20 bytes (for zone A) or 30 bytes (for zone B). The 4-byte servo bytes at the head of each segment are so-called pre-pits in which data is previously recorded in pits on the disk, and sample servo control is performed based on the pre-pit data during recording / reproduction. Also, a track address and a sector address are recorded as data based on the pre-pits, and are used at the time of search. In the data area of 20 bytes or 30 bytes following the servo byte, data is recorded by a magneto-optical effect by a circuit having a configuration described later. This 20
The difference of 1.5 times the recording capacity between 30 bytes and 30 bytes is
This is due to the difference in the recording clock rate between zone A and zone B. That is, by zoning recording, the linear recording density of the innermost track in zone A and the linear recording density of the innermost track in zone B are set to be substantially the same.
With such a setting, the recording capacity of the data area changes for each zone.

In this embodiment, the clock rate of the recording data is changed between the 4-byte servo byte of the zone A and the 20-byte data area. That is, in the case of a servo byte, which is a read-only area in which data is recorded in advance by pits, data can be recorded at a higher density than a recordable area in which data is recorded / reproduced by the magneto-optical effect. In the case of the example, the recording clock rate of the servo byte of the zone A is set to 1.5 times the recording clock rate of the data area of the zone A. Specifically, for example, the recording clock rate of the servo byte in the zone A is 15 MHz, and the recording clock rate of the data area in the zone A is 10 MHz. In the case of zone B, the recording capacity of the data area is set to 1.5 times that of zone A as described above, so that the recording clock rate of the servo byte and the recording clock rate of the data area match. That is, for example, the recording clock rate of the servo byte and the data area of the zone B is set to 15 MHz.

In the case of zone A, as shown in FIG. 3, one sector is constituted by 33 segments, and 30 sectors are formed by one track. In the case of zone B, as shown in FIG. 4, one sector is constituted by 22 segments, and 45 sectors are formed by one track. In this case, the positions of the sectors are aligned in each zone. Therefore, as shown by the broken line in FIG. 1, the boundary of each sector exists radially in each zone.

When recording data, the recording is performed in units of this sector. Referring to the configuration of each sector, in the case of zone A, as shown in FIG. 5, the data area of the first segment (first segment) of the 33 segments constituting one sector is set as a reference area. 20 bytes of reference data (reference data) are recorded when data is recorded in the sector. This reference data is for detecting the quality of the recording signal during reproduction,
More specifically, a signal of a constant frequency is recorded, the gain is adjusted by detecting the reproduction level of the reference data at the time of reproduction, synchronization of the system clock with the reproduction data is performed, and the data of the first segment is reproduced. It is recorded in all sections of the area. Then, in the data area from the second segment to the 33rd segment, 20 bytes of data are recorded in each segment.

Therefore, in the case of zone A, one sector has 20 bytes of reference data and 640 bytes (20 bytes × 20 bytes).
32 data) are recorded.

In the case of zone B, as shown in FIG. 6, the data area of the first segment (first segment) of the 22 segments constituting one sector is used as a reference area, 30 bytes of reference data are recorded when recording data. The reference data of zone B is the same as the reference data of zone A described above.
It is recorded in the entire data area of the first segment. In the data area from the second segment to the 22nd segment, 30 bytes of data are recorded in each segment.

Therefore, in the case of zone B, one sector has 30 bytes of reference data and 630 bytes (30 bytes × 30 bytes).
21 segments).

As described above, in zone A and zone B, 1
The storage capacity of the sectors is almost the same, and the storage capacity of one track is larger in the zone B because the number of sectors in each track is larger in the zone B.

Next, a recording / reproducing apparatus for a magneto-optical disk on which each track is formed in this manner will be described.

FIG. 7 is a diagram showing the configuration of a recording / reproducing apparatus for a magneto-optical disk to which the present invention is applied. 1 indicates a magneto-optical disk, and this magneto-optical disk 1 has a zone A as shown in FIG. And zoning recording which is divided into two zones, ie, zone B and zone B. The magneto-optical disk 1 is driven to rotate by a spindle motor 2, and signals are recorded / reproduced by an optical pickup 3 having a semiconductor laser or the like. The rotation control of the spindle motor 2 and various controls (such as seek control) of the optical pickup 3 are performed by a system controller 4 having a microcomputer configuration.

The data recorded on the magneto-optical disk 1 is transmitted from a recording data forming circuit (not shown) to the RA.
It is supplied to the M control circuit 11 and temporarily stored in the RAM 12 under the control of the RAM control circuit 11. Then, the stored data is supplied from the RAM 12 to the modulation circuit 13 at a predetermined timing, the recording circuit 13 performs modulation for recording, and the modulated recording data is supplied to the writing circuit 14. A predetermined writing process is performed at 14, and the processed recording data is supplied to the optical pickup 3, and writing is performed by the magneto-optical effect.

The data written on the magneto-optical disk 1 in this manner is read by the optical pickup 3 and supplied to a read circuit 15, which demodulates the data subjected to a predetermined read process by the read circuit 15. It is supplied to the circuit 16. Then, the data demodulated for reproduction by the demodulation circuit 16 is temporarily stored in the RAM 12, and the RAM control circuit 1
Under the control of 1, data stored in the RAM 12 is read and supplied to a reproduced data output circuit (not shown).

FIGS. 8 and 9 show a detailed configuration of the read circuit 15 and its periphery required for reproduction. In this example, each zone of the magneto-optical disk 1 is a servo byte which is a read-only area. And a data area which is a recordable area are mixed, so that at least two types of read clocks corresponding to each area are originally required, but one type of clock is commonly used. . That is, FIG. 8 shows the configuration of the clock generation circuit.
The reproduction signal supplied to the readout circuit 15 obtained at the terminal 21 is supplied to a clock pit extraction circuit 22, and the clock pit extraction circuit 22 extracts servo byte data. Then, the extracted servo byte data is
An LL circuit (phase locked loop circuit) 23 is supplied. The PLL circuit 23 is a circuit that converts a frequency signal output from the PLL circuit 23 to a terminal 24, and converts the frequency signal obtained at the terminal 24 into a servo byte of each zone. The data detection clock is used as the data detection clock (for reproduction) or the data write clock (for recording) in the data area of each zone.

In this embodiment, the frequency signal output from the PLL circuit 23 is the least common multiple of the recording clock rate of each area of each zone. That is, in zone A, the recording clock rate of the servo byte is 15 MHz, and the recording clock rate of the data area is 10 MHz, and in zone B, the recording clock rate of the servo byte and the data area is 15 MHz. Therefore, when 30 MHz becomes the least common multiple and the servo control of the disk is proper, the PLL circuit 23
Hz frequency signal is output.
A frequency signal of MHz is used as a recording / reproducing clock of each zone.

FIG. 9 shows the configuration of the read circuit 15 for extracting reproduced data based on the clock generated in this manner.
AGC circuit (automatic gain adjustment circuit) 32, amplitude detection circuit 33, and clock phase detection circuit 3
And 4. Then, the amplitude detection circuit 33 detects the reproduction amplitude of the reference data, and the clock phase detection circuit 34 detects the reproduction phase of the reference data. Then, the detection data of the two detection circuits 33 and 34 is supplied to a central control device (CPU) 35 for reading control. The central controller 35 controls the amount of gain adjustment of the reproduced signal performed by the AGC circuit 32 based on the supplied amplitude detection data. Further, based on the supplied clock phase detection data, correction data of the read clock is created, and the correction data is supplied to the clock phase correction circuit 39.
The clock phase correction circuit 39 adjusts the phase (phase shift) of the data detection clock obtained at the terminal 24 based on the correction data, and supplies the adjusted clock to the data detection circuit 38. Then, data is detected from the reproduced signal in synchronization with the clock supplied by the data detection circuit 38.

In this case, in this example, the PLL circuit 23
As a clock supplied to the clock phase correction circuit 39 from the above, a frequency signal of 30 MHz (when the servo control is appropriate) is used. Can be. That is, as described above, since the clock is the least common multiple of the clock required in each zone, in the case of a servo byte in zone A, data detection is performed every two cycles of the clock obtained at the terminal 24. Thus, the same data detection as that of the servo byte data detected by the 15 MHz clock can be performed. In the case of the data area of the zone A, the data of the servo byte is reduced by 10 times by performing data detection every three cycles of the clock obtained at the terminal 24.
Data detection similar to that detected with a MHz clock can be performed. Further, in the case of zone B, in any area, by detecting data every two cycles of the clock obtained at the terminal 24, the data of the servo byte is detected by the clock of 15 MHz. Similar data detection can be performed.

Here, the data detection state will be described with reference to FIG. 10. A in FIG. 10 shows a servo byte and a recordable area (so-called RAM area) which are a read-only area (so-called ROM area) of zone A. A predetermined track near a boundary with a certain data area is shown, and binary data is recorded in a read-only area with or without a pit,
In the data area, binary data is recorded with polarity (N pole or S pole). The recording data in this case is data by NRZI modulation, that is, data that is inverted when it is “1”. There is a non-recording portion of a predetermined length between the servo byte and the data area.

When reproducing the track shown in FIG. 10A, a clock (clock after phase correction) output from the PLL circuit 23 based on the recording data of the servo byte is:
As shown in FIG. 10B, by detecting the recording data of the servo byte in synchronization with this clock (detecting at the timing shown by the arrow), as shown in FIG. 10C,
Data changes every two cycles of this clock. Therefore, by performing data detection every two cycles of the clock, the recording data of the servo byte can be correctly detected, and the address data and the like recorded in the servo byte can be detected. Alternatively, after the data detection is performed every time at the timing synchronized with the clock, the recording data can be correctly detected similarly by making the data equivalent every two periods.

In the data area following the servo byte in zone A, the recording data changes every three cycles of the clock shown in FIG.
As shown in (2), by detecting data every three cycles of the clock, the recording data in the data area can be correctly detected. Alternatively, the data can be detected every time at the timing synchronized with the clock, and thereafter, the data can be equivalently detected every three periods, so that the recorded data can be correctly detected.

Although not shown, when reproducing each track in the zone B, the clock rate of the recording data is the same between the servo byte and the data area. The data changes every two cycles of
By performing data detection for each cycle, the recorded data can be correctly detected.

Referring again to FIG. 9, the configuration for detecting the reproduced data by the clock formed as described above will be described. The data detection circuit 38 is supplied with the reproduced signal whose gain has been adjusted by the AGC circuit 32. , Based on the clock supplied from the clock phase correction circuit 39,
The data recorded on the disc is decoded from the reproduction signal, and the decoded data is used as reproduction data at a terminal 40.
Is supplied to the subsequent circuit via

A terminal 36 is a terminal to which data recorded in a pit, that is, a reproduction signal of a servo byte is supplied, and a reproduction signal obtained at this terminal 36 is supplied to an address detection circuit 37. The address data decoded at 37 is supplied to the central controller 35, and the central controller 35 determines the currently reproduced track or sector based on the address data.

When data recorded on the magneto-optical disk 1 is reproduced by the circuit configured as described above, FIG.
The processing is performed at the timing shown in FIG. That is, A in FIG.
As shown in FIG. 11B, while the reference data of the first segment of each sector is being reproduced, as shown in FIG.
At 3, the reproduction amplitude of the reference data is detected, and as shown in FIG. 11C, the reproduction phase of the reference data is detected by the clock phase detection circuit 34. Then, when the servo byte of the second segment is being reproduced, the central control unit 35 determines the reproduction amplitude and the reproduction phase as shown in FIG. The phase correction amount in the clock phase correction circuit 39 is controlled. And
In the state where the gain adjustment and the phase correction have been performed in this manner, the data recorded in the data area from the second segment is decoded as shown in FIG. 11E. In addition,
Sample servo control is performed for each segment based on data reproduced from servo bytes of each segment.

When the next sector is reproduced and the reference data is reproduced, the gain adjustment and the phase correction are readjusted (re-correction) based on the reference data in the same manner.
The reproduction state is adjusted (corrected) for each sector based on the reference data.

In this case, in this example, the first track of each sector is set regardless of whether the reproduction track is zone A or zone B.
Since the reference data is recorded in all sections other than the servo bytes of the segment, data processing is performed in segment units as shown in FIG. 11, and reproduction processing can be performed with simple control.

That is, the recording capacity of the servo byte is 4 bytes in both the zone A and the zone B, and in any zone, the PLL circuit 23 based on the 4-byte reproduced data.
Using the system clock formed in step (1), timing control of reproduction processing (switching control between servo byte and data area, etc.) can be performed. Therefore, in this example, the timing control such as switching between the servo byte and the data area can be performed in each zone in spite of the zoning recording. Is the same in each zone, the control shown in FIG. 11 is performed at the same timing in any zone, and the reproduction process using the reference data can be easily performed. Furthermore, in this example, since the clock frequency for data reading is common to each area, it is sufficient to provide only one set of PLL circuits and the like for generating the reproduction clock, and the configuration of the reproduction system circuit is simplified. In particular, since a common clock can be used for the servo byte and the data area in zone A, there is no need to switch clocks during reproduction of each track in zone A, and data with different clock rates are mixed and recorded in one track. Even with the configuration of the present example in which the density is increased, no burden is imposed on the reproduction system circuit.

Next, the processing at the time of recording will be described.
Also at the time of this recording, data recorded in advance in the servo bytes of each zone is reproduced to create a system clock of the recording apparatus, and writing is performed in synchronization with this clock. That is,
As described with reference to FIG. 8, the data of the servo byte is extracted by the clock pit extracting circuit 22, and the extracted data is supplied to the PLL circuit 23 and converted into a frequency signal of 30 MHz to be a write clock. Thus, good writing can be performed in both zone A and zone B. In this case, in zone A, the same data is repeatedly written three times, and in zone B, the same data is repeatedly written twice.

The write state will be described with reference to FIG. 10, which is also referred to at the time of reproduction. Assume that a clock shown in FIG. 10B is obtained as an output of the PLL circuit 23 by a reproduction signal from a servo byte in zone A. At this time,
When recording predetermined data in the data area, which is a recordable area, the same data (high-level signal or low-level signal) is repeatedly written by the magneto-optical effect every three clock cycles. In the case of the zone B, although not shown, the same data is repeatedly written every two clock cycles.

By writing data in this manner, in the case of zone A, 20 bytes of data can be written in one segment, and in the case of zone B, 30 bytes of data can be written in one segment. In both zones, the clock based on the reproduction signal of the servo byte can be used as it is as the write clock, and the configuration of the recording system circuit is simplified as in the reproduction system circuit.

In the above-described embodiment, servo bytes for sample servo control and the like are used as read-only areas in which data is recorded in advance. However, read-only areas in which various data other than servo bytes are recorded are used. Record
The present invention can also be applied to a reproducing apparatus for a recording medium mixed with a reproducible area. For example, the present invention can be applied to a reproducing apparatus for a recording medium in which an area in which data can be recorded by the magneto-optical effect and a read-only area in which data is recorded in advance by pits and cannot be erased are mixed in units of one sector.

FIG. 12 shows an example of a recording medium in which such a read-only area and a recordable area are mixed. For example, a predetermined track Ta of this recording medium is divided into six segments, and each segment is divided into six segments. Alternate playback-only area (ROM area) and recordable area (RAM area)
Can also be applied to those having a configuration in which In this case, a control program or the like is recorded in advance by a pit at a relatively high clock rate in the segment of the reproduction-only area, and a processing result based on the control program by the polarity at a relatively low clock rate is recorded in the segment of the recordable area. It is conceivable to record them.
Then, the clock of the recording system circuit or the reproduction system circuit at the time of performing recording or reproduction in both areas is shared as the least common multiple, so that there is no need to switch the clock in one track, and the same operation and effect as in the above-described embodiment. The effect is obtained.

FIG. 13 shows a read-only area (ROM area) and a recordable area (RAM) alternately for each track.
Area), and if all segments of a predetermined track Tb of the recording medium are designated as read-only areas, the next track Tb + 1 is an area where all segments (excluding servo bytes) can be recorded. In the next track Tb + 2, all the segments become the reproduction-only area again. By changing the clock rate of the recording data between the track in the reproduction-only area and the track in the recordable area, efficient recording can be performed. However, a recording system or a reproduction system circuit for performing recording or reproduction in both areas. By sharing the clock as the least common multiple, it is not necessary to switch the clock in each track, and the same operation and effect as in the above embodiment can be obtained.

In the above embodiment, the least common multiple of the clock rate of each zone is used as the clock frequency. However, recording and reproduction can be similarly performed using a clock having a frequency that is an integral multiple of this least common multiple. However, it is not realistic to make the clock frequency too high. In addition, depending on the system configuration, it may be possible to achieve better recording / reproduction by slightly shifting the frequency from the least common multiple (or an integral multiple of the least common multiple) rather than using the least common multiple signal as a clock. Even when the clock frequency becomes too high if the least common multiple is determined more accurately, the least common multiple of the approximate value may be selected to select a clock with a lower frequency.

Further, the recording medium shown in FIG. 1 is used for zoning recording divided into two zones.
It can also be applied to zoning recording divided into zones or more.
Of course, the present invention can be applied to a recording medium other than the zoning recording. Furthermore, the present invention is not limited to the above-described embodiment, but may take various other configurations.

[0050]

According to the present invention, when a read-only area and a recordable area are mixed, a clock having an integral multiple of the least common multiple of the recording clock rate of each area is used.
By recording or reproducing data, recording or reproduction can be performed with a single clock in any area, common simple control can be performed in each area, and the configuration of the recording device and reproduction device can be improved. It's easy.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a recording medium according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a configuration of each track according to one embodiment.

FIG. 3 is an explanatory diagram showing a track configuration of a zone A according to one embodiment.

FIG. 4 is an explanatory diagram showing a track configuration of zone B according to one embodiment.

FIG. 5 is an explanatory diagram showing a data configuration of zone A according to one embodiment.

FIG. 6 is an explanatory diagram showing a data configuration of zone B according to one embodiment.

FIG. 7 is a configuration diagram showing a recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 8 is a configuration diagram illustrating a main part of a recording / reproducing apparatus according to an embodiment.

FIG. 9 is a configuration diagram illustrating a main part of a recording / reproducing apparatus according to an embodiment.

FIG. 10 is a timing chart for explaining one embodiment;

FIG. 11 is a timing chart for explaining one embodiment;

FIG. 12 is a configuration diagram showing a recording medium according to another embodiment.

FIG. 13 is a configuration diagram showing a recording medium according to another embodiment.

FIG. 14 is a schematic diagram illustrating zoning recording.

FIG. 15 is a schematic diagram illustrating zoning recording.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 magneto-optical disk 4 system controller 22 clock extraction circuit 23 PLL circuit (phase locked loop circuit) 32 AGC circuit (automatic gain adjustment circuit) 33 amplitude detection circuit 34 clock phase detection circuit 35 central control device 38 data detection circuit 39 clock Phase correction circuit

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-2-289937 (JP, A) JP-A-3-83232 (JP, A) JP-A-2-162578 (JP, A) JP-A-1- 151073 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) G11B ^7/ 00-7/013 G11B 20/10-20/16

Claims (2)

(57) [Claims] 1. An area exclusively for data reproduction and data recording possible
Area and the data recorded in the data
Clock rate of the data recorded and the data recordable
Recording with different clock rate to record data to rear
Play back recorded data and read data from media.
In the recording / reproducing apparatus for recording, the clock of the data recorded in the data reproduction-only area is clocked.
Crate and record data in the above data recordable area
Of the least common multiple of the clock rate
And control means for setting the clock over preparative, based on the set clock by the control means, the upper
Play the data recorded in the data read-only area
Based on the reproducing means and the clock set by the control means,
Recording means for recording data in the data recordable area;
Recording and reproducing apparatus equipped with. 2. An area exclusively for data reproduction and data recording possible
Area and the data recorded in the data
Clock rate of the data recorded and the data recordable
The clock rate of the data recorded in the rear
From a recording medium to a playback device that plays back the recorded data.
Stomach, of the data that has been recorded in the data read-only area clock
Crate and the data recorded in the data recordable area.
Multiple of the least common multiple of the data clock rate
And control means for setting the clock rate, based on the set clock by the control means, the upper
The data recorded in the data read-only area and the data
Data in the data recordable area
A playback device comprising: playback means for playing.