JP2009277321A - Recording apparatus, recording method and recording program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To record data to an LTH media in such a manner that allows data to be more reliably reproduced than in a conventional art. <P>SOLUTION: A controller 16 of a recording/reproduction apparatus 1 controls an optical pickup 6 to write data to an optical disk 5 which is the LTH media. When a write operation is performed with respect to an unrecorded minute data recording area for the first time, data having a data size corresponding to two tracks or more are written, and thereafter, when data are written to the minute data recording area, the data are written to an unrecorded portion following a portion in which data have been written during the previous write operation. As a result, data can be written to a minute data recording area of the optical disk 5 while avoiding a situation that a recorded track is present and isolated in the minute recording area, whereby data can be recorded to the LTH media in such a manner that allows the data to be more reliably reproduced than in the conventional art. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a recording apparatus, a recording method, and a recording program. For example, the present invention is applied to a case where data is recorded on an optical disc called a so-called LTH (Low to High) medium whose reflectance increases when data is written. And suitable.

  Currently, various optical disks such as CD (Compact Disc), DVD (Digital Versatile Disc), and BD (Blu-ray Disc) are widely used as recording media. This optical disc includes a so-called write-once type in which data can be additionally recorded (added recording) in an empty area.

  Here, a recording (writing) operation of the recording / reproducing apparatus for a write-once optical disc (also referred to as a write-once optical disc) will be briefly described.

  The write-once optical disc has an area for trial writing, and the recording / reproducing apparatus first performs trial writing while gradually changing the recording power of the laser beam to this area before actually recording data. I do.

  When the trial writing is completed, the recording / reproducing apparatus reproduces this area to obtain the signal level for each recording power, and based on this, sets the optimum recording power for data recording. Data is recorded in the data area of the write-once optical disc with power. The process of setting the optimum recording power for data recording in this way is called an OPC (Optimum Power Control) process.

  Here, it is assumed that after data is actually recorded, the user is instructed to end data recording once. Then, the recording / reproducing apparatus records information necessary for the next recording operation in a specific area of the write-once optical disc.

  Thereafter, it is assumed that the user instructs to resume data recording. Then, the recording / reproducing apparatus restarts the recording operation based on the information recorded in the specific area.

  In this way, the recording / reproducing apparatus records data on the write-once optical disc.

  Such a recording / reproducing apparatus is required to record data so that it can be reliably reproduced regardless of individual differences of optical disks.

  Therefore, conventionally, the process of performing trial writing while changing the recording power of the laser beam stepwise is executed in multiple areas, and the average signal level for each recording power is obtained from these multiple areas, and the optimum is based on this. A method for setting an appropriate recording power has been proposed (see, for example, Patent Document 1).

According to this method, even if one area is defective, it is based on the average signal level of recording power obtained from a plurality of areas, so that the recording power can be set appropriately.
WO2005 / 029479

  By the way, in a recording / reproducing apparatus that performs tracking control using the differential push-pull method, a tracking servo push-pull signal is calculated as the total amount of reflected light from the optical disk in order to compensate for variations in reflectivity of each optical disk. It comes to normalize.

  On the other hand, in recent years, in high-capacity write-once optical discs such as BDs, organic media called so-called LTH media, whose reflectivity increases when data is written, have attracted attention from the viewpoint of cost.

  However, when this LTH medium is used in the conventional recording / reproducing apparatus, the data level of the push-pull signal after normalization by the total amount of reflected light is not written in the recording area where the data is written. This is significantly smaller (for example, several dB) than the unrecorded area.

  As a result, in the conventional recording / reproducing apparatus, for example, when the LTH media is reproduced, the tracking servo may be removed when the laser light irradiation position moves from the unrecorded area to the recorded area, and data may not be read. It was.

  In particular, when the width of the recording area is narrow, such as when one recorded track is present in isolation in the unrecorded area, the signal level of the push-pull signal is greatly reduced, and the read error rate is increased. It has been confirmed. Incidentally, the term “one track” as used herein refers to a track for one round of the optical disc regardless of whether the track is formed in a concentric or spiral shape.

  Here, if data can be recorded on the LTH media so as to avoid such a situation, it is considered that the reproduction accuracy for the LTH media can be improved.

  The present invention has been made in consideration of the above points, and intends to propose a recording apparatus, a recording method, and a recording program capable of recording data on an LTH medium so that the data can be reproduced more reliably than in the past. is there.

  In order to solve such a problem, in the present invention, an optical disc of an LTH (Low to High) medium that has one or more recording areas, and when the data is written to the recording area, the reflectance of the written part increases. On the other hand, when writing data with a data size of two tracks or more at the first writing to the above-mentioned unrecorded recording area and a data writing section capable of writing data, and thereafter writing data to the recording area Is provided with a control unit for controlling the data writing unit so that data is written in an unrecorded part following the part in which data was written at the previous writing.

  By doing so, it is possible to write data to an optical disc that is an LTH medium while avoiding a situation where one recorded track is present in isolation, and as a result, the optical disc has the signal level of the push-pull signal. The decrease can be suppressed.

  According to the present invention, data is written to an optical disc of an LTH (Low to High) medium that has one or more recording areas, and when the data is written to the recording area, the reflectance of the written part increases. The data writing unit capable of recording data and data having a data size of two tracks or more are written at the first writing time to the unrecorded recording area, and when writing data to the recording area thereafter, the previous writing is performed. Since a control unit for controlling the data writing unit is provided so that data is written in an unrecorded portion following the portion in which data is sometimes written, one recording is performed on an optical disc that is an LTH medium. The data can be written while avoiding the situation where the track is isolated, and as a result, the push-pull signal is transmitted to the optical disc. Thus, it is possible to realize a recording apparatus, a recording method, and a recording program capable of recording data on the LTH media so that data can be reproduced more reliably than in the past.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(1) Overall Configuration of Recording / Reproducing Device In FIG. 1, reference numeral 1 denotes a recording / reproducing device capable of recording and reproducing as a whole with respect to a write-once optical disc (for example, BD-R). The recording / reproducing apparatus 1 includes an optical disk drive 2 and a host-side computer 3.

  The optical disk drive 2 rotates an optical disk 5 by a spindle motor 4 and optically records and reproduces data on the rotated optical disk 5 by an optical pickup 6 and a signal processing unit 7.

  The optical pickup 6 is placed on a sled 9 that can be moved in the radial direction of the optical disc 5 by a sled motor 8, and can move in the radial direction of the optical disc 5 together with the sled 9.

  The signal processing unit 7 includes a preamplifier 10, a servo circuit 11, a binarization circuit 12, a modulation / demodulation circuit 13, an ECC (Error Correcting Code) circuit 14, a buffer 15, and a control unit 16. .

  The control unit 16 comprehensively controls the entire optical disc drive 2 through the internal bus 17 in accordance with a control program recorded in a built-in memory.

  In practice, the servo circuit 11 controls the rotation of the optical disk 5 by sending a motor drive signal to the spindle motor 4 based on the control by the control unit 16, and sends the motor drive signal to the sled motor 8 to send the optical pickup 6. Control the position of the.

  Here, the optical pickup 6 drives a semiconductor laser (not shown) based on the control by the control unit 16 and irradiates the recording surface of the optical disc 5 with the laser light. As a result, the reflected light reflected by the recording surface of the optical disc 5 enters a photodetector (not shown) of the optical pickup. The optical pickup 6 photoelectrically converts the reflected light with a photodetector to obtain a light detection signal and sends it to the signal processing unit 7.

  The signal processing unit 7 generates a servo error signal (such as a focus error signal or a tracking error signal) from the light detection signal by calculating the light detection signal with a preamplifier 10 having an arithmetic circuit, and outputs the servo error signal to the servo circuit. 11

  The servo circuit 11 performs servo control (focus control, tracking control, etc.) of the actuator (not shown) of the objective lens of the spindle motor 4, the sled motor 8, and the optical pickup 6 based on the servo error signal.

  Here, when reproducing the data recorded on the optical disk 5, the signal processing unit 7 generates an analog data signal from the photodetection signal by calculating the photodetection signal from the optical pickup 6 with the preamplifier 10. This is sent to the binarization circuit 12.

  The binarization circuit 12 obtains a binarized data signal by A / D (analog / digital) conversion of the analog data signal, and sends it to the modulation / demodulation circuit 13. The modem circuit 13 demodulates the binarized data signal to obtain a demodulated data signal and sends it to the ECC circuit 14.

  The ECC circuit 14 performs error correction processing on the demodulated data signal to obtain an error correction data signal and sends it to the buffer 15. As a result, this error correction data signal is stored in the buffer 15 as data.

  The data stored in the buffer 15 is sent from the optical disk drive 2 to the computer 3 via an interface 18 such as SATA (Serial ATA). Then, the computer 3 performs predetermined processing (for example, AV decoding processing if this data is AV (Audio Video) data) on this data.

  On the other hand, when data is recorded on the optical disk 5, the signal processing unit 7 sends the data stored in the buffer 15 as data to be recorded on the optical disk 5 to the ECC circuit 14. Incidentally, it is assumed that this data is data sent from the computer 3 via the interface 18 as data to be recorded on the optical disc 5, for example.

  The ECC circuit 14 generates an encoded data signal by adding an error correction code to the data, and sends this to the modulation / demodulation circuit 13. The modem circuit 13 obtains a modulated data signal by modulating the encoded data signal and sends it to the optical pickup 6.

  The optical pickup 6 modulates the power of the laser beam based on the modulated data signal. As a result, data is recorded on the optical disc 5 by irradiating the recording surface of the optical disc with the modulated laser beam.

  In this way, the recording / reproducing apparatus 1 performs reproduction and recording on the optical disc 5.

(2) Tracking control Next, the tracking control in the recording / reproducing apparatus 1 will be described in detail. In this recording / reproducing apparatus 1, tracking control is performed using a differential push-pull (DPP) method.

  First, the optical path of the optical pickup 6 will be conceptually described with reference to FIG. In the optical pickup 6, for example, a laser beam emitted from a laser light source 30 made of a semiconductor laser is split into a main beam made of zero-order light and two side beams made of primary light by a grating 31, and then a beam splitter. Then, the light enters the collimator lens 33 via the reference numeral 32.

  The laser light is converted into parallel light by the collimator lens 33, converged by the objective lens 34, and irradiated onto the recording surface of the optical disk 5.

  As a result, the laser light (reflected light) reflected by the recording surface of the optical disc 5 enters the beam splitter 32 via the objective lens 34 and the collimator lens 33. The reflected light is reflected in a predetermined direction by the beam splitter 32 and is incident on the photodetector 36 via the cylindrical lens 35.

  As described above, the optical pickup 6 divides the laser light emitted from the laser light source 30 into three beams of the main beam and the two side beams and irradiates the recording surface of the optical disc 5.

  Here, the positions of the spots of each beam on the recording surface of the optical disc 5 will be described with reference to FIG. The main beam 40 is a beam for actually performing recording and reproduction. Here, for example, it is assumed that the spot of the main beam 40 is applied to the center of the desired track Tr (N).

  At this time, the spot of the side beam 41A is arranged so as to be positioned at the center of the gap Ga (N) formed between the track Tr (N) and the track Tr (N + 1) adjacent to the outer periphery of the disk. The

  At this time, the spot of the side beam 41B is at the center of the gap Ga (N-1) formed between the track Tr (N) and the track Tr (N-1) adjacent to the inner periphery of the disk. It is arranged to be located.

  That is, the spots of the side beams 41A and 41B are the gaps Ga (N) and Ga (N−1) on both sides of the track Tr (N) when the spot of the main beam 40 is located at the center of the track Tr (N). ) To be located at the center.

  Further, the spots of the side beams 41 </ b> A and 41 </ b> B are shifted from the spot of the main beam 40 in the rotation direction of the optical disc 5. That is, if the rotation direction of the optical disk 5 is clockwise, the spot of the side beam 41A is arranged at a position preceding the spot of the main beam 40, and the spot of the side beam 41B is the spot of the main beam 40. It is arranged at a position following it.

  Next, the photodetector 36 to which the reflected light of the main beam 40 and the side beams 41A and 41B is incident will be described with reference to FIG. The photodetector 36 includes a photodetector (also referred to as main PD) 50 for the main beam 40, a photodetector (also referred to as side PD) 51A for the side beam 41A, and a photodetector (side PD) 51B for the side beam 41B. is doing.

  Here, the main PD 50 is divided into four by four detection areas A to D, and the reflected light of the main beam 40 is received by these four detection areas A to D.

  The side PD 51A is divided into two by two detection areas E and F, and the two detection areas E and F receive the reflected light of the side beam 41A. The side PD 51B is also divided into two by the two detection areas G and H, and the reflected light of the side beam 41B is received by these two detection areas G and H.

  When the main PD 50 receives the reflected light of the main beam 40 in the detection areas A to D, the main PD 50 outputs a light detection signal for each of the detection areas A to D according to the amount of light detected in the detection areas A to D.

  Further, when the side PD 51A receives the reflected light of the side beam 41A in the detection areas E and F, the side PD 51A outputs a light detection signal for each of the detection areas E and F according to the amount of light detected in the detection areas E and F. Further, when the side PD 51B receives the reflected light of the side beam 41B in the detection areas G and H, the side PD 51B outputs a light detection signal for each of the detection areas G and H.

  The photodetector 36 sends the light detection signal for each of the detection areas A to H output from the main PD 50 and the side PDs 51A and 51B to the signal processing unit 7 in this way.

  The signal processing unit 7 generates a tracking servo differential push-pull signal based on the light detection signal.

  Specifically, the signal processing unit 7 pushes the main beam 40 by the preamplifier 10 having an arithmetic circuit based on the difference between the light detection signals of the detection areas A and D of the main PD 50 and the light detection signals of the detection areas B and C. A pull signal (this is also called a main push-pull signal) is generated.

  The preamplifier 10 generates a light amount signal of the main beam 40 (also referred to as a main light amount signal) from the sum of the light detection signals of the detection areas A to D of the main PD 50.

  Further, the preamplifier 10 generates a push-pull signal of the side beam 41A from the difference between the light detection signal in the detection region E of the side PD 51A and the light detection signal in the detection region F. Further, the preamplifier 10 generates a push-pull signal of the side beam 41B from the difference between the light detection signal of the detection signal G of the side PD 51B and the light detection signal of the detection region H. Then, the preamplifier 10 adds the push-pull signal of the side PD 51A and the push-pull signal of the side PD 51B and multiplies them by a predetermined coefficient, whereby the push-pull signals of the side beams 41A and 41B (this is also called a side push-pull signal). ) Is generated.

  Further, the preamplifier 10 generates light amount signals of the side beams 41A and 41B (also referred to as sub light amount signals) from the sum of the light detection signals of the detection regions E to H of the side PDs 51A and 51B.

  Further, the preamplifier 10 generates a normalized main push-pull signal by normalizing the main push-pull signal with the main light amount signal, and normalizes the sub push-pull signal with the sub light amount signal. A sub push-pull signal is generated.

  The preamplifier 10 generates a normalized differential push-pull signal (also referred to as a normalized differential push-pull signal) from the difference between the normalized main push-pull signal and the normalized sub-push-pull signal.

  The preamplifier 10 sends the normalized differential push-pull signal generated in this way to the servo circuit 11.

  The servo circuit 11 performs tracking control based on the normalized differential push-pull signal.

  In this way, the recording / reproducing apparatus 1 performs tracking control using the normalized differential push-pull method.

(3) Data Recording Here, data recording in the recording / reproducing apparatus 1 will be described in detail. As described above, the normalized differential push-pull signal is normalized by the total amount of reflected light from the optical disk 5.

  Therefore, when tracking control for LTH media is performed using such a normalized differential push-pull signal, the recorded area where data is written is normalized compared to the unrecorded area where data is not written. The signal level of the differential push-pull signal is reduced.

  In particular, when the width of the recording area is narrow, such as when one recorded track exists in an unrecorded area, the signal level of the normalized differential push-pull signal is greatly reduced.

  Therefore, the recording / reproducing apparatus 1 records data so that one recorded track does not exist in isolation.

  Here, a case where data is recorded on the optical disc 5 which is a write-once type LTH medium will be described as an example.

  First, the recording area of the optical disc 5 will be described. As shown in FIG. 5, the optical disk 5 has a lead-in area 60, a first spare area 61, a user data area 62, a second spare area 63, and a lead-out area as recording areas from the inner circumference side of the disk, for example. 64 is provided.

  The lead-in area 60 and the lead-out area 64 are recording areas for recording various information necessary for recording / reproducing of the write-once LTH optical disc 5.

  The user data area 62 is a recording area for recording user data such as AV data instructed to be recorded from the computer 3 side, for example. Actually, the main purpose of the optical disk 5 is to record and reproduce the user data, so that the user data area 62 is the largest area in the recording area.

  The first spare area 61 and the second spare area 63 are areas used as replacement areas for recording areas that cannot be normally recorded (also referred to as defective areas), and record at least data for four tracks or more. The size you get.

  In practice, if the recording / reproducing apparatus 1 fails to normally write data while writing data to a certain recording area and an error occurs, the data to be recorded in this recording area (defective area) is used instead. A process of recording in an alternative area provided in the first spare area 61 or the second spare area 63 (this is also referred to as a replacement process) is performed.

  Here, in the first spare area 61, data is additionally written in order from the recording start position Psa, which is the end on the inner circumference side of the disc, to the outer circumference side of the disc every time the replacement process is executed. Yes. For example, when the first spare area 61 is full, data is additionally written in order from the recording start position Psa on the inner circumference side of the second spare area 63 toward the outer circumference side of the disk. .

  Further, as shown in FIG. 6, the lead-in area 60 is provided with a second INFO area 60A, an OPC area 60B, a TDMA (Temporary Disc Management Areas) area 60C, and a first INFO area 60D from the inner periphery side of the disk. It has been.

  Further, as shown in FIG. 7, the lead-out area 64 is provided with a third INFO area 64A, an angular buffer area 64B, a fourth INFO area 64C, a DCZ area 64D, and a protection area 64E from the inner periphery side of the disc. Yes.

  Here, in the OPC area 60B of the lead-in area 60, a test writing area 70 and an OPCBuffer area 71 are provided from the inner periphery side of the disc.

  The trial writing area 70 is an area in which trial writing of data is actually performed when an OPC process for setting an optimum recording power for data recording is performed, and is a size capable of recording data of at least four tracks. It becomes.

  In the trial writing area 70, every time the OPC process is executed, data for trial writing is sequentially directed from the recording start position Pop, which is the end on the outer periphery side of the disk (that is, on the OPCBuffer area 71 side), toward the inner periphery side of the disk. It has come to be added.

  The OPCB buffer area 71 is a gap provided so that the data written in the test writing area 70 does not affect the adjacent area, and the test writing area 70 and the adjacent area (here, the first area). INFO area 60D). For this reason, data is not normally written in the OPCBuffer area 71.

  The TDMA area 60C of the lead-in area 60 is an area in which defect management information indicating the position (for example, address) of the defect area and the position of the replacement area is recorded, and records at least data for four tracks or more. The size you get.

  In the TDMA area 60, for example, the latest defect management information is sequentially added from the recording start position Ptd, which is the end on the inner periphery side of the disk, to the outer periphery side of the disk every time data recording is once completed. It has become.

  Further, the first INFO area 60D, the second INFO area 60A, the third INFO area 64A, and the fourth INFO area 64C of the lead-in area 60 and the lead-out area 64 include a buffer area 72, a DMA ( A Disc Management Areas area 73 and a Control Data area (also simply referred to as a CD area) 74 are provided.

  Among these, the DMA area 73 is an area in which the latest defect management information (described later) recorded in the TDMA area 60 is written at the time of finalization, and has a size capable of recording data of at least two tracks. In the DMA area 73, defect management information is written from the recording start position Pdm, which is the end on the inner circumference side of the disc, toward the outer circumference side of the disc at the time of finalization.

  Incidentally, the finalization is a final process for finishing the additional recording on the optical disc 5 and making the optical disc 5 a reproduction-only optical disc.

  The CD area 74 is an area in which information indicating that the optical disc 5 has been finalized (also referred to as finalization information) is written at the time of finalization, and has a size capable of recording data for at least two tracks. In the CD area 74, finalization information is written from the recording start position Pcd, which is the end on the inner circumference side of the disc, toward the outer circumference side of the disc at the time of finalization.

  Further, the DCZ area 64D of the lead-out area 64D is an optional trial writing area, and is an area for performing trial writing of data, like the OPC area 60B.

  By the way, among the recording areas described above, data is recorded in the user data recording area 62 with a larger data size (for example, several hundred megabytes) than when data is recorded in other recording areas. In practice, since a large amount of user data such as AV data is recorded in the user data recording area 62, such recording is desirable from the viewpoint of recording efficiency and recording speed.

  On the other hand, data is stored in the user data area 62 in the OPC area 60B, the first and second spare areas 61 and 63, the TDMA area 60C, and the first to fourth INFO areas 60D, 60A, 64A, and 64C. Compared to the case of recording, data is recorded with a small data size (for example, several tens of kilobytes). In practice, small-capacity auxiliary data such as test writing data and defect management information will be recorded in these recording areas, so that recording in this way is effective in recording efficiency and recording speed. It is desirable from the aspect. The OPC area 60B, the first and second spare areas 61 and 63, the TDMA area 60C, and the first to fourth INFO areas 60D, 60A, 64A, and 64C are also referred to as a minimal data recording area.

  Here, in this minimal data recording area, data may be recorded with a data size of one track or less, depending on the track position (inner side or outer side).

  At this time, if data is recorded in an unrecorded minimal data recording area with a data size of one track or less, a situation may occur in which one recorded track is present in isolation in the unrecorded area. As a result, the signal level of the normalized differential push-pull signal decreases, and there is a possibility that data recorded on this track cannot be reproduced.

  For this reason, the recording / reproducing apparatus 1 has a special recording process (this is not necessary) in order to prevent the situation in which one track in which data is written in the minimal data recording area exists in isolation. Is also called special recording processing).

  Hereinafter, the special recording process is performed on the OPC area 60B, the process performed on the first and second spare areas 61 and 63, the process performed on the TDMA area 60C, and the first to second processes. The processing is divided into the processing performed on the four INFO areas 60D, 60A, 64A, and 64C.

  First, a special recording process (this is also called a special OPC process) performed on the OPC area 60B will be described. This special OPC process is a process performed when data (for example, user data) is recorded for the first time on the unrecorded optical disk 5.

  For example, when the recording / reproducing apparatus 1 is instructed to record data on the optical disk 5 by a user via an input unit (not shown), for example, in a stage before performing a normal OPC process (also referred to as a normal OPC process), This special OPC process is performed.

  That is, as a special OPC process, the recording / reproducing apparatus 1 performs dummy data having a data size of three tracks from the recording start position Pop for the test writing area 70 in the OPC area 60B as shown in FIG. 8A. Write Da.

  Thereafter, the recording / reproducing apparatus 1 performs normal OPC processing. That is, as shown in FIG. 8B, the recording / reproducing apparatus 1 appends the test writing data Dop to the test writing area 70 in an unrecorded portion following the portion in which the dummy data Da has been previously written.

  Thereafter, each time the normal OPC process is performed, the recording / reproducing apparatus 1 sequentially adds new test writing data Dop to the test writing area 70.

  As described above, the recording / reproducing apparatus 1 writes the dummy data Da for three tracks from the recording start position Pop in the test writing area 70 and then writes the test writing data Dop. By doing so, only the trial writing data Dop is written in the unrecorded trial writing area 70, and one track on which the trial writing data Dop is written is present in isolation in the unrecorded area (FIG. 8). (C)) can be avoided.

  Incidentally, the recording / reproducing apparatus 1 writes the dummy data Da in the test writing area 70 with a recording power that can sufficiently recognize that data is written during reproduction.

  Next, a special recording process (also referred to as a special replacement process) performed on the first and second spare areas 61 and 63 will be described. This special replacement processing is also processing performed when data (for example, user data) is recorded for the first time on the unrecorded optical disc 5.

  The recording / reproducing apparatus 1 performs the special replacement process after performing the special OPC process described above, for example.

  That is, as a special replacement process, the recording / reproducing apparatus 1 applies dummy data Db having a data size of three tracks from the recording start position Psa to the first spare area 61 as shown in FIG. Write. Similarly, the recording / reproducing apparatus 1 also writes dummy data Db having a data size of three tracks from the recording start position Psa in the second spare area 63.

  Thereafter, when the recording / reproducing apparatus 1 finds a defective area at the time of data recording, for example, it performs a normal replacement process (also referred to as a normal replacement process). That is, as shown in FIG. 9B, the recording / reproducing apparatus 1 tried to write in the defective area in the unrecorded part following the part in which the dummy data Db was previously written in the first spare area 61. Add data Dsa.

  Thereafter, the recording / reproducing apparatus 1 appends the data Dsa that was to be written in the defective area to the first spare area 61 each time the normal replacement process is performed during data recording. When the first spare area 61 becomes full, this time, the data Dsa that was to be written to the defective area is added to the second spare area 63 next to the previously written dummy data Db.

  As described above, the recording / reproducing apparatus 1 writes the dummy data Db for three tracks from the recording start position Psa of the first spare area 61 and then additionally writes the data Dsa that was to be written to the defective area. It has become. Similarly, the recording / reproducing apparatus 1 writes the dummy data Db for three tracks from the recording start position Psa of the second spare area 63 and then additionally writes the data Dsa that was to be written to the defective area. It has become.

  In this way, only the data Dsa that was to be written in the defective area is written in the unrecorded first and second spare areas 61 and 63, and one track in which the data Dsa is written is in the unrecorded area. It is possible to avoid the situation (FIG. 9C) that exists in isolation.

  Next, a special recording process performed on the TDMA area 60C will be described. This special recording process is also a process performed when data (for example, user data) is recorded for the first time on the unrecorded optical disk 5.

  The recording / reproducing apparatus 1 performs the special recording process for the TDMA area 60C after performing the above-described special replacement process, for example.

  That is, as a special recording process for the TDMA area 60C, the recording / reproducing apparatus 1 performs dummy data Dc having a data size of three tracks from the recording start position Ptd for the TDMA area 60C as shown in FIG. Write.

  Thereafter, when the recording / reproducing apparatus 1 performs the normal replacement process at the time of data recording, the contents of the replacement process are stored, and when the data recording is once finished, as shown in FIG. In the area 60C, defect management information Dtd indicating the contents of the replacement process is additionally written in an unrecorded portion following the portion in which the dummy data Dc has been previously written.

  Incidentally, the contents of the replacement process (that is, the position of the defective area and the position of the replacement area) are stored in, for example, a memory built in the control unit 16.

  Thereafter, when the normal reproduction process is performed, the recording / reproducing apparatus 1 appends the latest defect management information to the TDMA area 60C when the data recording is once finished.

  As described above, the recording / reproducing apparatus 1 writes the defect management information Dtd after writing the dummy data Dc for three tracks from the recording start position Ptd of the TDMA area 60C. By doing so, only the defect management information Dtd is written in the unrecorded TDMA area 60C, and one track in which the defect management information Dtd is written is present in the unrecorded area in isolation (FIG. 10 ( C)) can be avoided.

  The dummy data Dc written in the TDMA area 60C is, for example, the first and second spare areas 61 so that the dummy data Db written in the first and second spare areas 61 and 63 is not actually used. 63, the recording area in which the dummy data Db is written is indicated as a defective area.

  Finally, special recording processing performed on the first to fourth INFO areas 60D, 60A, 64A, and 64C will be described. This special recording process is a process performed at the time of finalizing the optical disk 5.

  The recording / reproducing apparatus 1 performs a finalizing process when instructed by the user to finalize the optical disc 5 via an input unit (not shown), for example.

  That is, as shown in FIG. 11A, the recording / reproducing apparatus 1 performs the recording start position for each of the first to fourth INFO areas 60D, 60A, 64A, and 64C as finalization processing. The latest defect management information Dtd recorded in the TDMA area 60 is written from Pdm.

  At this time, the recording / reproducing apparatus 1 writes dummy data (specifically, for example, “0” data) Dd in all unrecorded areas in each DMA area 73 as a special recording process.

  Further, the recording / reproducing apparatus 1 indicates that the optical disc 5 has been finalized from the recording start position Pcd for each of the first to fourth INFO areas 60D, 60A, 64A, and 64C as the finalization process. Write finalize information Dcd.

  At this time, the recording / reproducing apparatus 1 writes dummy data (specifically, for example, “0” data) De to all the unrecorded areas in each CD area 74 as a special recording process.

  As described above, the recording / reproducing apparatus 1 writes the defect management information Dtd into the respective DMA areas 73 of the first to fourth INFO areas 60D, 60A, 64A, and 64C at the time of finalization, and then the remaining of the respective DMA areas 74 The dummy data Dd is written in all the unrecorded areas.

  In this way, only the defect management information Dtd is written in the unrecorded DMA area 73, and one track in which the defect management information Dtd is written is present in isolation in the unrecorded area (FIG. 11 ( B)) can be avoided.

  Further, in the recording / reproducing apparatus 1, after finalizing information Dcd is written in the respective CD areas 74 of the first to fourth INFO areas 60D, 60A, 64A, and 64C at the time of finalizing, the remaining unrecorded areas in the respective CD areas 74 are recorded. Dummy data Dd is written in all areas.

  By doing so, only the finalization information Dcd is written in the unrecorded CD area 74, and one track in which the finalization information Dcd is written exists in the unrecorded area in isolation (FIG. 11B). ) Can be avoided.

  In this way, the recording / reproducing apparatus 1 includes the OPC area 60B, the first and second spare areas 61 and 63, the TDMA area 60C, and the first to fourth INFO areas 60D and 60A, which are minimal data recording areas. Special recording processing is performed for 64A and 64C.

  As a result, the recording / reproducing apparatus 1 can record data on the optical disc 5 while avoiding a situation where one track in which data is written is present in an isolated manner in the minimal data recording area.

  As a result, the optical disc 5 on which data is recorded by the recording / reproducing apparatus 1 is one in which a decrease in the signal level of the normalized differential push-pull signal is suppressed. Thereafter, tracking using the normalized differential push-pull signal is performed. Even a playback apparatus that performs control is an LTH media that can be reliably played back.

(4) Recording Process Procedure Next, the data recording process procedure including the special recording process described above will be described in detail with reference to the flowchart shown in FIG. Incidentally, in this recording processing procedure, the control unit 16 of the recording / reproducing apparatus 1 mainly records data by controlling each unit of the signal processing unit 7 and the optical pickup 6 in accordance with a program recorded in the built-in memory. This is a procedure of processing to be performed.

  When the optical disk 5 is inserted and the control unit 16 is instructed by the user to record data on the optical disk 5 via, for example, an input unit (not shown), the control unit 16 starts the recording processing procedure RT1, Move to SP1.

  In step SP1, the control unit 16 determines whether or not the inserted optical disk 5 is an unrecorded medium. Specifically, the control unit 16 determines whether or not the optical disc 5 is unrecorded based on whether or not data is recorded in a specific area of the optical disc 5.

  Here, if the optical disk 5 is an unrecorded medium and if a positive result is obtained in this step SP1, then the control unit 16 proceeds to step SP2.

  In step SP2, the control unit 16 controls the signal processing unit 7 and the optical pickup 6 to perform special OPC processing for writing dummy data for three tracks in the OPC area 60B. By the way, the length of the optical disc 5 differs between the track on the inner circumference side of the disc and the track on the outer circumference side of the disc. That is, the optical disk 5 has different recording capacities per track on the inner and outer peripheral sides of the disk.

  Therefore, the control unit 16 converts the data size of three tracks at this radial position into the number of bytes based on the radial position of the optical disk 5 corresponding to the dummy data writing position (for example, address), and converts the converted byte. A number of dummy data are written. By doing so, the control unit 16 can reliably write the dummy data for three tracks regardless of whether the dummy data write position is on the inner or outer disk side.

  When this special OPC process is finished, the control unit 16 proceeds to the next step SP3. In step SP3, the control unit 16 controls the signal processing unit 7 and the optical pickup 6 to perform normal OPC processing, and proceeds to the next step SP4.

  In step SP4, the control unit 16 controls the signal processing unit 7 and the optical pickup 6 to perform special replacement processing for writing dummy data in the first and second spare areas 61 and 63, and then proceeds to next step SP5. In step SP5, the control unit 16 controls the optical pickup 6 to perform a special recording process for writing dummy data in the TDMA area 60C, and proceeds to the next step SP6.

  In step SP6, the control unit 16 controls the signal processing unit 7 and the optical pickup 6 to perform normal data recording processing. That is, the control unit 16 records data designated to be recorded on the optical disc 5 in the user data recording area 62. At this time, if a defective area is found, the control unit 16 controls the signal processing unit 7 and the optical pickup 6 to perform normal replacement processing, and stores the contents of the replacement processing in the memory. When the normal data recording process is thus completed, the control unit 16 proceeds to the next step 7.

  In step SP7, the control unit 16 determines whether or not the normal replacement process has been performed in the normal data recording process in step SP6.

  Here, if a positive result is obtained in step SP7 because the normal replacement process has been performed, the control unit 16 proceeds to step SP8.

  In step SP8, the control unit 16 controls the signal processing unit 7 and the optical pickup 6 to perform normal recording processing on the TDMA area 60C accompanying the normal replacement processing in step SP6. That is, the control unit 16 writes the contents of the normal replacement process stored in step SP6 in the TDMA area 60C as defect management information. When the normal recording process for the TDMA area 60C is thus completed, the control unit 16 proceeds to the next step SP9.

  On the other hand, if a negative result is obtained in the above-described step SP7 because the replacement process has not been performed, the control unit 16 skips step SP8 and proceeds to step SP9.

  In step SP9, for example, the control unit 16 determines whether or not the user has instructed the optical disc 5 to be finalized via an input unit (not shown).

  Here, if an affirmative result is obtained in step SP9 due to the instruction to finalize, the control unit 16 proceeds to step SP10 at this time.

  In step SP10, the control unit 16 controls the optical pickup 6 to continue the normal recording process and the special recording process for the first to fourth INFO areas 60D, 60A, 64A, and 64C as the finalizing process.

  That is, the control unit 16 writes the latest defect management information in the respective DMA areas 73 of the first to fourth INFO areas 60D, 60A, 64A, and 64C as the normal recording process. In addition, the recording / reproducing apparatus 1 writes dummy data in all unrecorded areas in each DMA area 73 as a special recording process.

  Further, the recording / reproducing apparatus 1 writes finalization information in the respective CD areas 74 of the first to fourth INFO areas 60D, 60A, 64A, and 64C as normal recording processing. In addition, the recording / reproducing apparatus 1 writes dummy data De in all unrecorded areas in each CD area 74 as a special recording process.

  In this way, when the normal recording process and the special recording process for the first to fourth INFO areas 60D, 60A, 64A, and 64C are completed, the control unit 16 ends the recording process procedure RT1.

  On the other hand, if a negative result is obtained in the above-described step SP9 because the instruction to finalize is not given, the control unit 16 skips step SP10 and ends the recording processing procedure RT1.

  If a negative result is obtained in step SP1 described above, that is, if the optical disc 5 is a recorded medium, the control unit 16 moves to step SP12 to control the signal processing unit 7 and the optical pickup 6, A normal OPC process is performed, the process proceeds to step SP13, a normal data recording process is performed, and the process proceeds to step SP7.

  As described above, when the optical disc 5 is a recorded medium, the control unit 16 does not perform special OPC processing, special replacement processing, and special recording processing in the TDMA area 60C. That is, the special OPC process, the special replacement process, and the special recording process in the TDMA area 60C are processes performed only when data is recorded on the unrecorded optical disk 5 for the first time.

  In accordance with such a recording processing procedure RT1, the signal processing unit 7 and the control unit 16 control the optical pickup 6 to record data on the optical disc 5.

(5) Operation and Effect In the above configuration, the recording / reproducing apparatus 1 is as small as one track or less when the control unit 16 controls the signal processing unit 7 and the optical pickup 6 to record data on the optical disc 5 of the LTH media. A special recording process is performed for a minimal data recording area in which data is recorded with a data size.

  That is, the recording / reproducing apparatus 1 writes the dummy data for three tracks from the recording start position in the OPC area 60B as the minimal data recording area, and then sequentially writes the data to be written in this area after the dummy data. Write.

  As a result, data of at least three tracks or more exists in the OPC area 60B.

  In this way, the recording / reproducing apparatus 1 has a situation where only data of one track or less from the recording start position is written in the unrecorded OPC area 60B, that is, one recorded track exists in isolation. Can be avoided.

  In addition, the recording / reproducing apparatus 1 performs the same special recording process on the first and second spare areas 61 and 63 and the TDMA area 60C as the minimum data recording area.

  As a result, data of at least three tracks or more exists in the first and second spare areas 61 and 63 and the TDMA area 60C.

  By doing so, the recording / reproducing apparatus 1 is in a situation where only data of one track or less from the recording start position is written in the first and second spare areas 61 and 63 and the TDMA area 60C, that is, one recording It is possible to avoid a situation where a finished track exists in isolation.

  Furthermore, the recording / reproducing apparatus 1 writes the data to be written in these areas at the time of finalizing each of the first to fourth INFO areas 60D, 60A, 64A, and 64C as the minimum data recording areas, Write dummy data to all unrecorded parts of the area.

  As a result, in each of the first to fourth INFO areas 60D, 60A, 64A, and 64C, data corresponding to that area (at least for two tracks or more) exists.

  By doing this, the recording / reproducing apparatus 1 is in a state where only data of one track or less is written in the first to fourth INFO areas 60D, 60A, 64A, 64C, that is, one recorded track is isolated. Can be avoided.

  As described above, the recording / reproducing apparatus 1 can record data to be written while avoiding a situation in which one recorded track is present in isolation in the minimal data recording area.

  As a result, the optical disc 5 of the LTH media on which data is recorded by the recording / reproducing apparatus 1 is one in which a decrease in the signal level of the normalized differential push-pull signal is suppressed. Even the conventional playback apparatus that performs the tracking control used is an LTH media that can be reliably played back. In other words, the optical disc 5 is an LTH media that can be reproduced even by a reproducing apparatus that could not reproduce LTH media.

  Thus, the recording / reproducing apparatus 1 can record data on the optical disc 5 of the LTH media so that it can be reproduced more reliably than in the past.

  In particular, the recording / reproducing apparatus 1 can avoid a situation in which one recorded track is isolated in the past, which has been highly likely to occur when data is first written to the optical disc 5, so that many unrecorded areas remain. However, it is possible to avoid a situation in which the optical disc 5 cannot be played back.

  In this example, dummy data for three tracks is written in the OPC area 60B, the first and second spare areas 61, 63, and the TDMA area 60C as an example. The above dummy data may be written.

  In other words, in order to avoid a situation where one recorded track is present in isolation, the n tracks (n is 2 or more) for the OPC area 60B, the first and second spare areas 61 and 63, and the TDMA area 60C. It suffices to write dummy data of an integer) or more.

  Actually, in the recording / reproducing apparatus 1, when one recorded track is present in isolation in the unrecorded area, the push-pull signal in this recorded track is compared with the push-pull signal in the unrecorded track, It has been confirmed that the signal level is reduced by about 70%.

  On the other hand, if the number of recorded tracks is increased next to, and further to, the recorded tracks, the decrease in signal level is suppressed. For example, when three recorded tracks are consecutive, It has been confirmed that the decrease in level can be suppressed to about 50%.

  In the recording / reproducing apparatus 1 having the above-described configuration, if the signal level of the push-pull signal is reduced by about 50%, the tracking control can be performed almost certainly. That is, in the recording / reproducing apparatus 1, it can be said that tracking control can be reliably performed if dummy data for at least three tracks is written.

  If the dummy data is written for four tracks or more, the signal level can be further reduced, but the recording capacity that can be used in the optical disk 5 is reduced accordingly.

  That is, in the recording / reproducing apparatus 1, dummy data for three tracks is written in consideration of both the suppression of the decrease in the signal level of the push-pull signal and the securing of the recording capacity.

  According to the above configuration, the recording / reproducing apparatus 1 controls the signal processing unit 7 and the optical pickup 6 to write data to the optical disc 5 of the LTH media. When writing data with a data size of 2 tracks or more at the first writing, and then writing data to the minimal data recording area, data is written in the unrecorded part following the part where the data was written at the previous writing. As a result, the data can be written to the minimal data recording area of the optical disc 5 that is an LTH medium while avoiding the situation where one recorded track is present in isolation. It is possible to make the optical disc in which a decrease in the signal level of the push-pull signal is suppressed.

  Thus, the recording / reproducing apparatus 1 can record data on the LTH media so that the recording / reproducing apparatus 1 can reproduce more reliably than the conventional one.

(6) Other Embodiment (6-1) Other Embodiment 1
In the above-described embodiment, when data is recorded on the unrecorded optical disk 5 for the first time, a special OPC process for writing dummy data for three tracks in the OPC area 60B is performed, and then test writing is performed in the OPC area 60B. A normal OPC process for writing data for use is performed.

  The present invention is not limited to this. For example, as shown in FIG. 13A, when the first normal OPC process is performed, dummy data Da for three tracks is written, and then test writing is performed following the dummy data Da. Data for data Dop may be written.

  Further, for example, as shown in FIG. 13B, after writing dummy data Da for two tracks instead of for three tracks, the test writing data Dop may be written after the dummy data Da. .

  Further, for example, as shown in FIG. 13C, the dummy data Da for one track may be written, and then the test writing data Dop may be written after the dummy data Da.

  Further, in these cases, after writing the test writing data Dop, the dummy data Dop for 1 to 3 tracks may be written following the test writing data Dop.

  In any case, since the dummy data Da for one track or more and the trial writing data Dop of a predetermined data size are written at the first normal OPC processing, one recorded track exists in the OPC area 60B in isolation. It is possible to avoid such a situation.

  In addition, when the first normal replacement process is performed for the first and second spare areas 61 and 63, dummy data for one track or more is written, and the dummy data Da is followed by a defect area. You may make it write the data which was going to write.

  Similarly, in the TDMA area 60C, when the first normal recording process is performed, dummy data for one track or more may be written, and then defect management information may be written following the dummy data.

  Incidentally, in order to increase the reliability of information written in the TDMA area, there are cases where a plurality of TDMA areas are provided on the optical disk 5 and the same information is written in each of the plurality of TDMA areas.

  In this case, for example, the recording / reproducing apparatus 1 may perform special recording processing on all TDMA areas.

(6-2) Other Embodiment 2
In the above-described embodiment, at the time of finalization as the final process, the defect management information is written in the DMA areas 73 of the first to fourth INFO areas 60D, 60A, 64A, and 64C, and the remaining unprocessed information is written. Dummy data was written in all recording areas.

  The present invention is not limited to this. For example, as shown in FIG. 14, after writing defect management information Dtd having a predetermined data size, dummy data Dd for one track or more is written following the defect management information Dtd. May be.

  Similarly, after the finalization information Dcd having a predetermined data size is written in the CD area 64 of each of the first to fourth INFO areas 60D, 60A, 64A, and 64C, the finalization information Dcd is followed. Dummy data De for one track or more may be written.

  In any case, it is possible to avoid a situation where one recorded track exists in isolation in the first to fourth INFO areas 60D, 60A, 64A, and 64C.

(6-3) Other Embodiment 3
Furthermore, in the above-described embodiment, the recording / reproducing apparatus 1 performs a special recording process for avoiding a situation in which one recorded track exists in isolation with respect to the optical disc 5 that is an LTH medium. I made it.

  Here, for example, the recording / reproducing apparatus 1 may determine whether or not the inserted optical disk 5 is an LTH medium, and perform the special recording process only when the optical disk 5 is an LTH medium. .

  In order to determine whether or not the inserted optical disk 5 is an LTH medium, for example, a method of recording data in a freely usable recording area to detect a change in the signal level of the push-pull signal, or other existing methods The method described above may be used.

(6-4) Other Embodiment 4
Further, in the above-described embodiment, the recording / reproducing apparatus 1 has the OPC area 60B as the test writing area, the first and second spare areas 61 and 63, the TDMA area 60C as the temporary defect management area, the first to the first. Special recording processing is performed on the four INFO areas 60D, 60A, 64A, and 64C.

  The present invention is not limited to this. If there is a recording area in which data can be recorded with a data size of one track or less, for example, a special recording process is performed on the recording area. You may do it.

  For example, when the DCZ area 64D provided in the lead-out area 64 is used as a data trial writing area, a special recording process is performed on the DCZ area 64D. That is, dummy data for three tracks from the recording start position is written in the unrecorded DCZ area 64D.

  By doing so, it is possible to avoid a situation where one recorded track exists in the DCZ area 64 in isolation.

  In addition to the recording areas, for example, special recording processing may be performed on an optical disk provided with a recording area different from the optical disk 5.

(6-5) Other Embodiment 5
Furthermore, in the above-described embodiment, the case where the present invention is applied to the recording of data on the optical disk 5 which is a write-once type LTH medium has been described.

  The present invention is not limited to this, and may be applied to data recording on the optical disk 5 that is a rewritable LTH medium, as long as the recording control similar to the write-once type is possible. That is, after performing a recording process in which dummy data for two or more tracks from the recording start position is performed on an unrecorded minimal data recording area, the data is written in a track following the track in which the dummy data is written. Any optical disk 5 that can perform various recording processes may be used.

(6-6) Other Embodiment 6
Furthermore, in the above-described embodiment, a program for executing a recording process including the special recording process is written in the memory of the control unit 16 in advance. The present invention is not limited to this, and this program is recorded on, for example, a general HTL (High to Low) medium optical disk 5, and the recording / reproducing apparatus 1 reads this program from the optical disk 5 and controls the control unit 16. You may make it install in memory. The program sent from the computer 3 via the interface 18 may be installed in this memory.

(6-7) Other Embodiment 7
Further, in the above-described embodiment, the recording / reproducing apparatus 1 controls the optical pickup 6 and the signal processing unit 7 as a data writing unit capable of writing data to the optical disc 5 of the LTH media, and these. A control unit 16 as a control unit is provided.

  The present invention is not limited to this, and each functional unit of the recording / reproducing apparatus 1 described above may be configured by various other hardware as long as it has the same function.

  Further, the present invention is not limited to the recording / reproducing apparatus 1 as long as the recording apparatus can realize the recording process similar to that of the above-described embodiment. It can be applied to various devices.

(6-8) Other Embodiment 8
Further, the present invention is not limited to the above-described embodiment and the other embodiments 1 to 8 described so far. That is, the present invention is also applicable to a mode in which a part or all of the above-described embodiment and other embodiments 1 to 8 described so far are arbitrarily combined, or a part of which is extracted.

  For example, the other embodiments 1 and 2 may be combined, or in addition to 1 and 2, another embodiment 3 may be combined.

  The present invention can be widely used, for example, in personal computers, game machines, AV recorders, and the like, which are recording devices for writing data on an optical disc of LTH media.

It is a block diagram which shows the structure of a recording / reproducing apparatus. It is a basic diagram which shows the optical path of an optical pick-up. It is a basic diagram which shows the positional relationship of the spot of a light beam. It is a basic diagram which shows the structure of a photodetector. It is a basic diagram which shows the recording area of an optical disk. It is a basic diagram which shows the structure of a lead-in area | region. It is a basic diagram which shows the structure of a lead-out area | region. It is a basic diagram with which it uses for description of the writing of the dummy data by a special OPC area | region. It is a basic diagram with which it uses for description of the writing of the dummy data by a special replacement area. It is an approximate line figure used for explanation of writing of dummy data by special recording processing to a TDMA area. It is a basic diagram with which it uses for description of the writing of dummy data by the special recording process with respect to an INFO area | region. It is a flowchart which shows a recording processing procedure. It is a basic diagram with which it uses for description of the writing (1) of the dummy data by other embodiment. It is a basic diagram with which it uses for description of the writing (2) of the dummy data by other embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Recording / reproducing apparatus, 2 ... Optical disk drive, 5 ... Optical disk 5 ... Optical pick-up, 7 ... Signal processing part, 16 ... Control part, 60A, 60D, 64A, 64C ... INFO area | region, 60B ... OPC area, 60C... TDMA area, 61, 63... Spare area, Da, Db, Dc, Dd, De.

Claims (11)

A data record that has one or more recording areas and can be written to an optical disc of an LTH (Low to High) medium in which the reflectance of the written portion increases when data is written to the recording area. And
When writing to the unrecorded recording area for the first time, data having a data size of two tracks or more is written, and thereafter, when writing data to the recording area, it follows the portion where the data was written at the previous writing. A recording apparatus comprising: a control unit that controls the data writing unit so as to write data in an unrecorded part. The control unit
The data writing unit is configured to write data having a data size of at least two tracks at the first writing to an unrecorded recording area in which data of one track or less may be written in the recording area. The recording apparatus according to claim 1. The control unit
When writing to the unrecorded recording area for the first time, write dummy data which has a data size of 2 tracks or more and is not originally written, and then write data to the recording area at the time of the previous writing The recording apparatus according to claim 2, wherein the data writing unit is controlled so that data to be originally written is written in an unrecorded portion subsequent to a portion in which data is written. The control unit
When first writing to the unrecorded recording area, the dummy data that is not originally written and the data that should be originally written are written with a data size of two tracks or more, and then data is written to the recording area. The recording apparatus according to claim 2, wherein the data writing unit is controlled to write data to be originally written in an unrecorded portion subsequent to a portion in which data was written at the previous writing time. The control unit
Of the above-mentioned unrecorded recording areas, the data to be originally written is written to the recording area in which data is written only at the time of performing the final process to finish writing to the optical disc, and the remaining unrecorded data is written. The recording apparatus according to claim 2, wherein the data writing unit is controlled to write dummy data that is not originally written to all of the recording portions. The control unit
Based on the radial position of the optical disk corresponding to the data writing position, the data size of two or more tracks is converted into the number of bytes, and the data having the converted number of bytes is stored in the unrecorded recording area. The recording apparatus according to claim 2, wherein the data writing unit is controlled to write. The control unit
At the time of the first writing to a spare area as an alternative area to which data is written instead of a defective area and a temporary management area to which defect management information for managing the defective area and the alternative area is temporarily written, two or more tracks are written. The recording apparatus according to claim 3, wherein the data writing unit is controlled to write dummy data having a data size. The control unit
The recording apparatus according to claim 7, wherein the dummy data written in the temporary management area is recorded so that the dummy data written in the spare area is not used. The control unit
The above data is written so that dummy data having a data size of two tracks or more is written at a predetermined recording power at the time of initial writing to the trial writing area where trial writing for setting the optimum recording power for data recording is performed. The recording apparatus according to claim 3, wherein the recording unit is controlled. Data writing that has one or more recording areas and can write data to an optical disc of an LTH (Low to High) medium in which the reflectance of the written portion increases when data is written to the recording area When writing to the unrecorded recording area for the first time, the section writes data having a data size of two tracks or more, and when writing data to the recording area thereafter, the data was written at the previous writing time. Recording method that controls to write data to the unrecorded part that follows the part. For the recording device
Data writing that has one or more recording areas and can write data to an optical disc of an LTH (Low to High) medium in which the reflectance of the written portion increases when data is written to the recording area When writing to the unrecorded recording area for the first time, the section writes data having a data size of two tracks or more, and when writing data to the recording area thereafter, the data was written at the previous writing time. A recording program that runs a program that controls to write data to an unrecorded part that follows the part.

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