JP2007052923A - Optical disk, recorder, and method of recording - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently record data on an optical disk wherein a plurality of recording tracks arrayed in parallel are formed spirally, and at least a part of addresses of adjacent recording tracks are common. <P>SOLUTION: On the optical disk used for this optical disk device, two tracks of a track TrA and a track TrB are formed spirally as a pair. The optical disk device alternately switches the track wherein data is recorded with 16 clusters being an integral multiple of an error correction unit as a switching unit. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an optical disc, a recording apparatus, and a recording method in which a plurality of recording tracks arranged in parallel are formed in a spiral shape.

  Conventionally, an optical disc is known as a recording medium on which program data, video data, audio data, and the like are recorded. In general, a single recording track is spirally formed on the recording surface of the optical disc, and data is sequentially recorded on the single recording track, for example, from the inner circumference side to the outer circumference side.

Japanese Patent Laid-Open No. 06-274896

  In recent years, in order to increase the recording data density, an optical disc has been proposed in which two recording tracks are spirally formed on the recording surface and the tracks are in a so-called double spiral format.

  However, with such a double spiral type optical disc, it is difficult to efficiently record data on two recording tracks.

  An object of the present invention is to provide an optical disc, a recording apparatus, and a recording method in which a plurality of recording tracks arranged in parallel that can efficiently record data are formed in a spiral shape.

  In order to solve the above-described problems, an optical disc according to the present invention is an optical disc in which a plurality of recording tracks arranged in parallel are formed on a spiral, the first recording track sharing a side wall, At least one address for the first recording track and the second recording track recorded by the wobble corresponding to the first recording track and the second recording track. The parts are common.

  Also, the recording apparatus according to the present invention is an optical disk recording apparatus having an address in which a plurality of recording tracks arranged in rows are formed on a spiral and at least a part of adjacent recording tracks is common. Recording means for recording data on the track; and control means for controlling the recording means to switch the recording track for recording data every integer multiple of the error correction unit.

  Further, the recording method according to the present invention is an error correction method in an optical disk recording method of an address in which a plurality of recording tracks arranged in parallel are formed on a spiral and at least a part of adjacent recording tracks is common. The recording track is switched every integer multiple of the unit, and data is recorded on the plurality of recording tracks.

  In the present invention, a plurality of recording tracks arranged in parallel are formed on a spiral, and recording is performed for each integer multiple of error correction units on an optical disc having an address where at least a part of adjacent recording tracks is common. The data is recorded on all the recording tracks by switching the track. Thereby, data can be recorded efficiently. In the present invention, the switching point of each recording track can be easily determined. Further, even when reproducing an optical disk on which data is recorded according to the present invention, this switching point can be easily determined, and the recorded data can be easily edited. Further, in the present invention, since data can be efficiently recorded on the optical disc, the transfer rate when data is written can be increased.

  Hereinafter, an optical disc device according to an embodiment to which the present invention is applied will be described with reference to the drawings. In describing the optical disk apparatus according to this embodiment, an example in which an optical disk of a so-called MD-DATA2 format is used as a recording medium will be shown.

  FIG. 1 is a diagram for explaining the track shape of the optical disk, and FIG. 2 is an enlarged view of a main part A of a recording track of the optical disk. The optical disk 1 is a disk-shaped recording medium having a diameter of about 64 mm and a disk thickness of 1.2 mm, and data is recorded by a magneto-optical recording method. The optical disc 1 has a recording track pitch of 0.95 μm.

  In the optical disc 1, spiral lands and grooves are formed on the disc recording surface from the outer peripheral side to the inner peripheral side. In the optical disc 1, the land portion of the formed lands and grooves serves as a recording track to record data. Further, in this optical disc 1, the track format is a so-called double spiral format, and a pair of two recording tracks (that is, lands) arranged in parallel is formed in a spiral shape on the disc recording surface. Here, of the pair of recording tracks, the recording track on the inner peripheral side is referred to as a recording track TrA, and the recording track on the outer peripheral side is referred to as a recording track TrB.

  Between each recording track, a wobbled groove WG to which wobble is given or a non-wobbled groove NWG to which no wobble is given is formed. Specifically, the non-wobbled groove NWG is adjacent to the inner circumference side of the recording track TrA, and the wobbled groove WG is adjacent to the inner circumference side of the recording track TrB. That is, a wobbled groove WG is formed between a pair of recording tracks TrA and recording tracks TrB constituting a spiral, and a non-wobbled portion is formed on both sides of the pair of recording tracks TrA and recording tracks TrB constituting the spiral. Groove NWG is formed.

  In the wobbled groove WG, meandering lines are formed in accordance with a signal obtained by subjecting the physical address on the optical disc 1 to FM modulation and biphase modulation. Therefore, the recording / reproducing apparatus for recording / reproducing the optical disk 1 detects the wobble signal which is a signal corresponding to the meander line formed in the wobbled groove WG, and demodulates the wobble signal to thereby detect the optical disk. The physical address information on 1 can be extracted. Further, since this wobbled groove is formed between a pair of recording tracks TrA and recording tracks TrB constituting a spiral, the recording tracks TrA and the recording tracks TrB share one address. It has become.

  In the optical disc 1, by forming the wobble groove WG in this way, for example, it is possible to detect a wobble signal with reduced crosstalk with a wobble signal given from another wobble groove WG, and to track the recording track. The pitch can be narrowed.

  The recording track TrA and the recording track TrB to which the same address information is given are identified as follows.

  In order to identify the recording track TrA and the recording track TrB, for example, as shown in FIG. 3, two side beams for detecting the wobble signal are used together with a main beam for recording and reproducing recorded data. Use it. The beam spots SPs1 and SPs2 of the two side beams are irradiated onto the groove adjacent to the recording track when the beam spot SPm of the main beam is on track with respect to a predetermined recording track. Yes. Therefore, for example, when the beam spot SPm of the main beam is in an on-track state on the recording track TrA, the beam spot SPs1 of the outer side beam is irradiated on the wobbled groove WG, and the side beam of the inner side is irradiated. The beam spot SPs2 is applied to the non-wobbled groove NWG. On the other hand, when the beam spot SPm of the main beam is in an on-track state on the recording track TrB, the beam spot SPs1 of the outer peripheral side beam is irradiated to the non-wobbled groove NWG, and the beam of the inner side beam The spot SPs2 is irradiated on the wobbled groove WG.

  Therefore, in the optical disc 1, the groove irradiated by the two side beam beam spots SPs1 and SPs2 depends on whether the beam spot SPm of the main beam is irradiated on the recording track TrA or the recording track TrB. Swap between WG and non-wobbled groove NWG. Accordingly, in the optical disc 1, the recording track TrA to which the same address information is given by determining which of the side beam beam spots SPs1 and SPs2 is irradiated on the wobbled groove WG (or non-wobbled groove NWG). And the recording track TrB.

  The recording track of the optical disk 1 is irradiated with laser light having a wavelength λ of 650 nm through an objective lens having a numerical aperture NA of 0.52. On this recording track, data is recorded at a transfer rate of 589 kB / s, and data is recorded at a constant linear velocity of 2.0 m / s. Data is recorded on this recording track with a 1-bit bit length of 0.29 μm.

  The recording track of the optical disc 1 is recorded with data adopting a 1-7 RLL (Run Length Limited) modulation method, an RS-PC (Reed-Solomon-product code) error correction method, and a block-complete deinterleaving method. Is done. As a result, this optical disc 1 has a data redundancy of 19.7%, and has an overall storage capacity of about 650 Mbytes.

  Further, in the optical disc 1, one address area recorded by the wobbled groove WG constitutes one sector. One sector is formed about every 6.9 mm along the recording track. In this optical disc 1, a unit of one cluster is constituted by a recording area of 16 sectors. In one cluster, data in units of one error correction (ECC) block is recorded. Therefore, in this optical disc 1, data in units of ECC blocks, which are data rewrite units, are recorded in one cluster, and consistency between the physical address and the amount of data to be recorded is taken. In the optical disc 1, the data amount of one ECC block is 32768 bytes.

  The specifications of the optical disc 1 are summarized in Table 1 below.

  In the optical disc 1 as described above, data can be recorded at a high density. For example, in the case of a video signal compressed by MPEG2, recording can be performed for about 15 to 17 minutes.

  Next, an optical disc apparatus according to an embodiment to which the present invention for recording / reproducing information on the optical disc 1 is applied will be described.

  FIG. 4 is a block diagram of an optical disc apparatus according to an embodiment to which the present invention is applied.

  The optical disk device 2 rotates the optical disk 1, a magnetic head 11 that applies a modulation magnetic field to the optical disk 1 during data recording, an optical head 12 that emits laser light to the optical disk 1 during data recording and reproduction, and the like. A spindle motor 13 is provided.

  The optical disc apparatus 2 includes a data input unit 14, an ID / EDC encoder 15, an ECC decoder 16, a memory 17, a modulation unit 18, and a magnetic field modulation driver 19 as a recording system. The optical disc apparatus 2 includes an RF amplifier 21, an RF signal demodulator 22, an ID decoder 23, a memory 24, an ECC decoder 25, an EDC decoder 26, and a data output unit 27 as a reproduction system. . The optical disc apparatus 2 includes a servo controller 28 as a servo system. The optical disc apparatus 2 includes an ADIP decoder 29 that detects a wobble signal recorded in the wobbled groove WG of the optical disc 1 to detect physical address information of the optical disc 1. The optical disk apparatus 2 includes a system controller 30 that controls the recording system and the reproduction system, the servo controller 28, and the like.

  The optical disc apparatus 2 performs the following processing during the recording operation.

  Recording data to be recorded on the optical disc 1 is supplied to the optical disc device 2 from an external device such as a camera, a video tape recorder, or a satellite broadcast set-top box. This recording data is supplied to the data input unit 14. The recording data input to the data input unit 14 is supplied to the ID / EDC encoder 15. The ID / EDC encoder 15 adds ID information of the recording data and an error detection code (EDC) for detecting an error of the recording data to the supplied recording data. The recording data to which the ID information and EDC are added is supplied to the ECC decoder 16. The ECC decoder 16 adds an error correction code (ECC) to the recording data in units of predetermined error correction blocks. The recording data to which the ECC is added is temporarily stored in the memory 17.

  The recording data stored in the memory 17 has a time lag caused by a difference between the transfer rate when the data is transferred from the external device to the optical disc device 2 and the write rate when the data is written to the optical disc 1. After being absorbed, it is supplied to the modulator 18. The modulation unit 18 modulates the supplied recording data using a predetermined modulation method. The modulated recording data is supplied to the magnetic field modulation driver 19. The magnetic field modulation driver 19 drives the magnetic head 11 in accordance with the supplied recording data, and performs magneto-optical recording on the recording track of the optical disc 1 with this recording data.

  In addition, the optical disc apparatus 2 performs the following processing during the reproduction operation.

  In the optical disc apparatus 2, the optical head 12 reads data recorded on the recording track of the optical disc 1 and supplies a reproduction signal to the RF amplifier 21. The RF amplifier 21 performs processing such as amplification of a reproduction signal read from the optical disc 1 and supplies the amplified signal to the RF signal demodulation unit 22. The RF signal demodulator 22 generates reproduction data by performing binarization processing and demodulation processing of the reproduction signal. The generated reproduction data is temporarily stored in the memory 24. The reproduction data generated by the RF signal demodulator 22 is also supplied to the ID decoder 23. The ID decoder 23 detects ID information from the reproduction data. The detected ID information is temporarily stored in the memory 24 together with the reproduction data indicated by the ID information.

  The reproduction data stored in the memory 24 is after the time lag caused by the difference between the read rate when reading data from the optical disc 1 and the transfer rate of data from the optical disc device 2 to the external device is absorbed by the memory 24. , And supplied to the ECC decoder 25. The ECC decoder 25 performs error correction of the reproduction data based on the ECC added in units of predetermined error correction blocks. The reproduced data after the error correction is supplied to the EDC decoder 26. The EDC decoder 26 performs error detection of the reproduction data based on the EDC added to the reproduction data. The reproduced data on which the error has been detected is supplied to the data output unit 27. The data output unit 27 supplies reproduction data to an external device such as a camera, a video tape recorder, or a satellite broadcast set-top box.

  Further, the optical disk apparatus 2 performs the following servo processing during recording operation or reproducing operation.

  The RF amplifier 21 is a focus error signal indicating whether the laser spot of the laser light emitted from the optical head 12 is just focused on the recording surface of the optical disk 1 based on the signal detected by the optical head 12. A tracking error signal or the like indicating whether the laser spot is a just track in the recording track is generated. The focus error signal, tracking error signal, and the like are supplied to the servo controller 28. The servo controller 28 controls the optical head 12 based on the focus error signal, tracking error signal, and the like so that the laser spot of the laser light emitted from the optical head 12 becomes a just spot and a just track.

  Further, the servo controller 28 controls the rotational speed of the spindle motor 13 so that data can be recorded or reproduced at a constant linear speed based on, for example, a clock obtained from a wobble signal or the like. The servo controller 28 switches the power of the laser light emitted from the optical head 12 or controls the power so that recording or reproduction can be performed on the optical disk 1 with a suitable laser power.

  Further, the optical disc apparatus 2 performs address information detection processing from the optical disc 1 as follows during recording operation or reproduction operation.

  As described above, the address information is recorded on the optical disc 1 in the wobbled groove WG adjacent to the recording track (land). For example, the RF amplifier 21 generates a so-called push-pull signal from the difference in the amount of reflected light between the two side spots SPs1 and SPs2. This push-pull signal is supplied to the ADIP decoder 29. The ADIP decoder 29 detects a wobble signal from this push-pull signal. Then, the ADIP decoder 29 decodes the wobble signal, detects the physical address on the optical disc 1 currently recorded or reproduced, and supplies it to the system controller 30. Further, the ADIP decoder 29 judges the polarity of the wobble signal, and the track position where the recording track currently recorded or reproduced is formed in a so-called double spiral format is the recording track TrA on the inner circumference side. It is detected whether there is a recording track TrB on the outer peripheral side. The position information of the recording track is supplied to the system controller 30.

  The system controller 30 is supplied with address information and track position information detected by the ADIP decoder 29. Information such as a reproduction start address and a recording start address is supplied to the system controller 30 from an external device or the like. Based on these pieces of information, the system controller 30 generates a track jump signal for moving the optical head 12 in the radial direction of the optical disc 1 and supplies it to the servo controller 28. The servo controller 28 moves the optical head 12 in the radial direction of the optical disk 1 based on the track jump signal, and irradiates the recording track at a predetermined address with laser light.

  As described above, the optical disc apparatus 2 can perform magneto-optical recording on the optical disc 1 with the recording data supplied from the external device, and can reproduce the optical disc 1 and supply the reproduction data to the external device.

  Next, a method for recording data on each recording track of the optical disc 1 formed in the double spiral format will be described.

  As described above, the optical disc 1 has a so-called double spiral format, and a pair of two recording tracks (recording track TrA, recording track TrB) arranged in parallel is spirally formed on the disc recording surface. ing. In the optical disc apparatus 2, a predetermined switching unit is set, and recording is performed by switching the recording track TrA that is the recording track on the inner circumference side and the recording track TrB on the recording track on the outer circumference side for each switching unit.

  Specifically, as shown in FIG. 5, the optical disc apparatus 2 records, for example, a recording track TrA and a recording track TrB after recording data for 16 clusters with a track length of 16 clusters as a predetermined switching unit. And are switched. The amount of data recorded in one cluster is equivalent to the amount of data in one ECC block (the amount of data in one ECC block is 32768 bytes). Thus, the length of a track that is an integral multiple of the cluster is used as a switching unit. Thus, in the optical disc apparatus 2, the switching unit can be set to a constant data amount. As described above, when the amount of data recorded in one switching unit is constant, for example, even when a plurality of different applications are recorded on one optical disc 1, the position for switching between the recording track TrA and the recording track TrB is specified. Can be handled easily. Further, since data is recorded at a constant linear velocity on the optical disc 1, the length of one cluster is constant (about 6.9 mm × 16), and thus the track length that is an integral multiple of the cluster is used as a switching unit. Thus, in the optical disc apparatus 2, the switching unit can be set to a constant track length.

  A recording process of the optical disc apparatus 2 that performs recording by switching the recording track TrA and the recording track TrB by using 16 clusters as a switching unit will be described with reference to the flowchart shown in FIG. Here, the sector-by-sector physical address of the optical disc 1 is expressed as ADD_X.

  First, when recording is started, the system controller 30 designates a recording start address (ADD_X) based on control information supplied from an external device or the like (step S1). Subsequently, the system controller 30 gives a track jump command to the servo controller 28 to cause the optical head 12 and the magnetic head 11 to track jump to the recording start address (ADD_X) (step S2). Subsequently, the system controller 30 moves the optical head 12 and the magnetic head 11 to the recording track TrA on the inner circumference side of the recording start address (ADD_X) (step S3), and the recording start address (ADD_X) of the recording track TrA. ) Starts recording data (step S4).

  Then, the system controller 30 monitors the address information detected by the ADIP decoder 29 and determines whether or not the recorded data is an address (ADD_X + 15) 16 sectors ahead from the recording start address (ADD_X) ( Step S5). Subsequently, when it is determined that up to the address of 16 sectors ahead (ADD_X + 15) has been recorded, that is, when it is determined that data for one cluster has been recorded, whether data for 16 clusters has been recorded next. Is determined (step S6). If it is determined that data for 16 clusters has not been recorded, the processing from step S5 is repeated.

  When the system controller 30 determines that data for 16 clusters has been recorded, the system controller 30 stops recording data on the recording track TrA. That is, if it is determined that data for a predetermined switching unit has been recorded, the recording is stopped (step S7).

  Subsequently, the system controller 30 gives a track jump command to the servo controller 28, and causes the optical head 12 and the magnetic head 11 to make a track jump to the recording start address (ADD_X) again (step S8). Subsequently, the system controller 30 moves the optical head 12 and the magnetic head 11 to the recording track TrB on the outer periphery side of the recording start address (ADD_X) (step S9), and the recording start address (ADD_X) of the recording track TrB. Data recording is started from (Step S10).

  Then, the system controller 30 monitors the address information detected by the ADIP decoder 29 and determines whether or not the recorded data is an address (ADD_X + 15) 16 sectors ahead from the recording start address (ADD_X) ( Step S11). Subsequently, when it is determined that up to the address of 16 sectors ahead (ADD_X + 15) has been recorded, that is, when it is determined that data for one cluster has been recorded, whether data for 16 clusters has been recorded next. Is determined (step S12). If it is determined that data for 16 clusters has not been recorded, the processing from step S11 is repeated.

  When the system controller 30 determines that data for 16 clusters has been recorded, the system controller 30 stops recording data on the recording track TrB. That is, if it is determined that data for a predetermined switching unit has been recorded, the recording is stopped (step S13).

  When the system controller 30 records data for 16 clusters on both the recording track TrA and the recording track TrB, the system controller 30 designates an address (ADD_X + 255) 16 clusters ahead of the designated address (ADD_X) (step S14), the process from step S2 is repeated.

  In the optical disc apparatus 2, by performing the processing from step S1 to step S14 as described above, data can be efficiently recorded on the optical disc 1, and the switching point of each recording track can be easily set. Can be determined.

  Furthermore, the optical disc apparatus 2 can sequentially record data from the innermost circumference side (or outermost circumference side) of the optical disc 1 by performing the processing from step S1 to step S14 as described above. Therefore, when a predetermined amount of data is recorded on the optical disc 1, the entire outer peripheral side (or inner peripheral side) from a certain address can be an unrecorded area where no data is recorded. Therefore, when additional data is recorded on the optical disc 1, the data is recorded in this unrecorded area. For this reason, in the optical disc apparatus 2, when additional data is recorded, even if the writing position is shifted due to disturbance or the like, there is no possibility that data already recorded on the optical disc 1 is overwritten and erroneously erased.

  Further, in the optical disc apparatus 2, by performing the processing from step S1 to step S14 as described above, data can be efficiently recorded on the optical disc 1, and the transfer rate at the time of writing data can be increased. .

  Hereinafter, a reference example of a method for switching and recording between the recording track TrA and the recording track TrB will be described.

  In the optical disc apparatus 2, as shown in FIG. 7, the switching unit is set to a predetermined track length (for example, 32 clusters), and the recording start address in each switching unit to be recorded is changed between the recording track TrA and the recording track TrB. You may do it. For example, when the recording start address in the first switching unit of the recording track TrA is ADD_X, the recording start address in the first switching unit of the recording track TrB is recorded as ADD_X + 8, and then the second recording track TrA is recorded. The recording start address in the switching unit is recorded as ADD_X + 32, and the recording start address in the second switching unit of the recording track TrB is recorded as ADD_X + 40. In this way, from the position corresponding to the predetermined position between the recording start position of the recording track data before the switching and the recording end position of the recording track data before the switching, the data is recorded on the recording track after the switching. By starting recording, the movement time between recording tracks can be relatively shortened, and the transfer rate when writing data can be increased.

  Further, in the optical disc apparatus 2, the switching unit may be set to a length with respect to the radius of the optical disc 1, and the recording track TrA and the recording track TrB may be switched and recorded. For example, in the optical disc apparatus 2, the radius length of the optical disc 1 may be switched every 200 μm, and the number of times of the recording track may be switched every 200 rounds. Here, by setting this switching unit within a range that can be followed only by the tracking servo system, the switching can be performed at high speed without imposing a burden on the sled servo system. Also in this case, as shown in FIG. 7, from a position corresponding to a predetermined position between the recording start position of the recording track data before switching and the recording end position of the recording track data before switching. Data recording may be started on the recording track after switching.

  Further, in the optical disk apparatus 2, when recording audio data, the recording unit may be set to a delimiter according to the contents of the audio data and the recording track TrA and the recording track TrB may be switched and recorded. For example, in the optical disc apparatus 2, switching may be performed every second of audio data, or may be switched in units of so-called sound units when data compression is performed by the ATRAC method. In the optical disc apparatus 2, when recording video data, the recording unit may be set to a delimiter according to the content of the video data and the recording track TrA and the recording track TrB may be switched and recorded. For example, in the optical disc apparatus 2, switching may be performed every integer multiple of the number of frames, or switching may be performed in a so-called GOP unit when data is compressed by the MPEG method. Thus, by setting the switching unit based on the division of the contents of the audio data and the video data, the switching point can be easily determined even when reproducing the optical disc, and the recorded data can be edited. It can be done easily. Also in this case, as shown in FIG. 7, from a position corresponding to a predetermined position between the recording start position of the recording track data before switching and the recording end position of the recording track data before switching. Data recording may be started on the recording track after switching.

  Also according to the above reference example, data can be efficiently recorded on the optical disc 1 of the double spiral format. Further, in the optical disc apparatus 2, the switching point of each recording track can be easily determined. In addition, when the optical disk 1 is reproduced, the switching point can be easily determined, and the recorded data can be easily edited. In addition, since the optical disc apparatus 2 can efficiently record data on the optical disc 1, the transfer rate when writing data can be increased.

  In the description of the present invention, the optical disk apparatus 2 for recording data on the double spiral optical disk 1 has been described. However, the present invention is not limited to recording data on a double spiral track optical disk. Is formed in a spiral shape, the number of recording tracks is not limited.

It is a figure for demonstrating the track shape of the optical disk used for the optical disk apparatus of embodiment of this invention. It is the figure which expanded the principal part of the said optical disk. It is a figure for demonstrating the beam spot irradiated to a recording track in order to detect the physical address of the said optical disk. 1 is a block configuration diagram of an optical disc device according to an embodiment of the present invention. It is a figure for demonstrating the switching unit and switching system of a recording track at the time of recording data on an optical disk. It is a flowchart for demonstrating the recording process of the said optical disk apparatus. It is a figure for demonstrating the reference example of the switching unit and switching system of a recording track at the time of recording data on an optical disk.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical disk, 2 Optical disk apparatus, 11 Magnetic head, 12 Optical head, 13 Spindle motor, 14 Data input part, 15 ID, EDC encoder, 16 ECC decoder, 17 Memory, 18 Modulation part, 19 Magnetic field modulation driver, 21 RF amplifier, 22 RF signal demodulator, 23 ID decoder, 24 memory, 25 ECC decoder, 26 EDC decoder, 27 data output unit, 28 servo controller, 29 ADIP decoder, 30 system controller

Claims (3)

An optical disc in which a plurality of recording tracks arranged in parallel are formed on a spiral,
A first recording track sharing a side wall and a second recording track;
The first recording track recorded by wobble corresponding to the first recording track and the second recording track and at least a part of the address for the second recording track are common. An optical disc. In an optical disk recording apparatus having an address in which a plurality of recording tracks arranged in parallel are formed on a spiral and at least a part of adjacent recording tracks is common,
Recording means for recording data on the recording track;
A recording apparatus comprising: control means for controlling the recording means to switch a recording track for recording data every integer multiple of an error correction unit. In a recording method of an optical disc having an address in which a plurality of recording tracks arranged in parallel are formed on a spiral and at least a part of adjacent recording tracks is common.
An optical disc recording method, wherein recording tracks are switched every integer multiple of an error correction unit, and data is recorded on the plurality of recording tracks.

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