JP2004062947A - Device and method for recording optical information, and optical disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable restoring, reproducing, and additional writing in the session of on-going recording even when unexpected power cut-off or the like occurs during data recording on an optical information recording medium in which data can be recorded but not rewritten. <P>SOLUTION: A last fragment state recorded in a last session is investigated in S21, determination is made whether or not the recording is normally ended in S22, and the process is finished when the recording is normally ended. When the normal end of the recording is not determined, an ECC block constituted of dummy data is added to complete the fragment in S23, the session is closed to restore the session of a DVD+R disk, and this processing is finished. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an optical information recording device for recording data on an optical information recording medium such as a DVD + R disk, an optical information recording method thereof, and an optical disk device such as a DVD + R drive.
[0002]
[Prior art]
Conventionally, when power is cut off during data recording on an optical information recording medium, an ECC block at a position where recording is interrupted is examined, and if an inconsistent ECC block is detected, all of the inconsistent ECC blocks are overwritten. There has been an optical disk device (see, for example, Japanese Patent Application Laid-Open No. 2000-112831) that restores a block by doing so.
As an optical information recording medium capable of recording or reproducing data that has been frequently used in recent years, for example, there is a DVD + R disc. This DVD + R disc is a write-once disc on which data can be recorded only once (it cannot be overwritten). As a method of recording data on a DVD + R disc, a multi-session recording method of dividing one disc into a maximum of 191 sessions is used. Further, each session is divided into a maximum of 16 regions called fragments.
[0003]
In the fragment, user data is recorded in a size of an integral multiple of an ECC block (16 sectors). At the beginning of each session, there is an area in which fragment information and the like in the session are recorded. The area in the first session is called a lead-in area, and the area after the second session is called an intro area.
Further, after each session, there is an area called a closure, and after the last session of the DVD + R disc, there is an area called a lead-out area. When a session is closed without appending, a closure is recorded. When the session is closed without appending, a lead-out area is recorded.
[0004]
[Problems to be solved by the invention]
However, in the above-described conventional optical disk apparatus, data can be recorded on an optical information recording medium on which data can be recorded but cannot be rewritten (for example, a write-once (Write Once) disk such as a DVD + R disk which cannot be overwritten). For example, if the recording of data is interrupted due to an unexpected power-off, the ECC block cannot be overwritten on the optical information recording medium as described above and cannot be restored. This makes it impossible to reproduce the fragment that has been written and to additionally record data, and there is a problem that the optical information recording medium is wasted.
The present invention has been made in order to solve the above-described problems, even if an unexpected power cutoff or the like occurs during data recording on an optical information recording medium that can record data but cannot rewrite data, An object of the present invention is to restore a session that was being recorded so that reproduction and additional recording can be performed.
[0005]
[Means for Solving the Problems]
The present invention provides the following optical information recording devices (1) to (4) to achieve the above object.
(1) The recording area of an optical information recording medium that can record data by irradiating light but cannot rewrite data is divided into one or more sessions, and divided into a plurality of areas within the session. In an optical information recording apparatus that records data in a predetermined recording unit in the area and records management information in the area along with data recording in the area, data recording in the area is continuously performed. Data unrecorded portion determining means for determining whether there is a data unrecorded portion in which no data is recorded in the final area, and the data unrecorded portion is determined by the data unrecorded portion determining means. An optical information recording apparatus provided with recording means for recording dummy data in a data unrecorded portion when it is determined that there is data.
[0006]
(2) In the optical information recording apparatus according to (1), the data unrecorded portion determining means determines whether or not the session is closed, and the session is not closed by the determining means. When it is determined that the data is recorded in the last area of the area in the session where data is continuously recorded, the reproducing means reproduces the data recorded in the last area. And a determination means for determining that the data unrecorded portion is present in the final area when the reproduction signal is no longer obtained in the optical information recording apparatus.
[0007]
(3) In the optical information recording apparatus according to (1) or (2), when a data unrecorded portion occurs in the middle of the predetermined recording unit, the recording unit becomes the predetermined recording unit. An optical information recording apparatus comprising: dummy data recording means for recording dummy data in the data unrecorded portion; and session closing means for closing the session after the dummy data recording by the dummy data recording means.
(4) In the optical information recording device according to any one of (1) to (3), the optical information recording medium has address information recorded in advance when data is not recorded, and the data unrecorded An optical information recording device for detecting a portion based on the address information.
[0008]
Also, the following (5) optical information recording method is provided.
(5) The recording area of the optical information recording medium that can record data by irradiating light but cannot rewrite data is divided into one or more sessions, and divided into a plurality of areas in the session. In the optical information recording method of recording data in a predetermined recording unit in the area and recording management information of the area along with data recording in the area, whether the session of the recording area is closed If the session is not closed, and if it is determined that the session is not closed, the data recorded in the last area of the above area in the session where data is continuously recorded is reproduced. In the case where a reproduced signal cannot be obtained during the reproduction of the data, it is determined that the data unrecorded portion exists in the final area, and when it is determined that the data unrecorded portion exists, Serial dummy data is recorded in the data unrecorded portion so as to have a predetermined recording unit, an optical information recording method of closing the session after recording of the dummy data.
[0009]
Further, the following optical disk devices (6) to (11) are also provided.
(6) In an optical disc apparatus for recording data on a DVD + R disc, a judging means for examining the final fragment state of the DVD + R disc to judge whether or not the recording has not been completed normally, and that the judging means makes a normal recording If it is determined that the recording has not been completed, an ECC block composed of dummy data is added to complete the fragment, the session is closed, and the session of the DVD + R disc is restored, and the optical disc apparatus is provided with a restoration unit.
(7) In the optical disk device of (6), the determining means reproduces the last ECC block of the last fragment of the DVD + R disc, and if the last ECC block cannot be reproduced normally, determines whether there is an RF signal. An optical disk device which is a means for determining whether or not recording has been normally completed by checking.
[0010]
(8) In the optical disk device of (6) or (7), there is provided means for recording information indicating that the session has been restored by the restoration means in the SDCB in the lead-in area or intro area of the DVD + R disc. Optical disk device.
(9) The optical disk device according to (6) or (7), further comprising means for recording information indicating that the session has been restored by the restoration means in the TOC of the DVD + R disc.
(10) The optical disk device according to (8) or (9), further comprising a transfer unit that transfers information indicating whether or not the session has been restored by the restoration unit to an externally connected host computer.
(11) In the optical disk device of (10), the transfer means is means for transferring information indicating whether or not the session has been restored by a read DVD structure command to an externally connected host computer.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of an optical disk device according to an embodiment of the present invention.
This optical disk device is an optical information recording device that records and reproduces data by irradiating the optical disk 1 with light, and includes a spindle motor 2, an optical pickup 3, a laser controller 4, a DVD encoder 5, a DVD-ROM encoder 6 , ADIP decoder 7, buffer RAM 8, buffer manager 9, read amplifier 10, DVD decoder 11, DVD-ROM decoder 12, ATAPI / SCSI interface (I / F) 13, motor driver 14, servo unit 15, D / A converter 16 , ROM 17, CPU 18, and RAM 19, and LB indicates a laser beam.
[0012]
In the figure, the arrows indicate the directions in which data mainly flows, and for simplification of the figure, the CPU 18 that controls each block in the figure is attached with only a thick line to connect to each block. Omitted.
The ROM 17 stores a control program described in a code decodable by the CPU 18. When the power of the optical disk drive is turned on, the control program is loaded into the main memory of the CPU 18 (not shown), and the CPU 18 controls the operation of each unit according to the control program. Etc. are temporarily stored in the RAM 19.
[0013]
That is, this optical disc device divides a recording area of an optical information recording medium into which data can be recorded by irradiating light, but cannot rewrite data, into one or more sessions. This is an optical information recording apparatus that divides data into data in a predetermined recording unit in the area, and records management information in the area along with data recording in the area.
A data non-recording portion determining means for determining whether or not there is a data non-recording portion in which no data is recorded in a last region of the region where data recording is continuously performed; If the data unrecorded portion determining means determines that there is the data unrecorded portion, the function of a recording device for recording dummy data in the data unrecorded portion is performed.
[0014]
Further, as the data unrecorded portion determining means, a determining means for determining whether or not the session is closed; and when the determining means determines that the session is not closed, the area in the session is determined. A reproducing means for reproducing data recorded in a final area where data recording is continuously performed, and when a reproduction signal cannot be obtained during data reproduction by the reproducing means, The function of the judging means for judging that the data unrecorded portion exists in the last area is achieved.
Further, when the data unrecorded portion occurs in the middle of the predetermined recording unit, the recording means records dummy data in the data non-recorded portion so as to be the predetermined recording unit. Means and a session closing means for closing the session after dummy data recording by the dummy data recording means. Further, the optical disk 1 has address information recorded in advance when data is not recorded, and the CPU 18 performs a function of detecting the data unrecorded portion based on the address information.
[0015]
The optical disc 1 is a DVD-RAM / WO disc, DVD-R disc, DVD + R disc, DVD-RAM disc, DVD-RW disc, and DVD + RW disc is a writable (recordable) DVD (Digital Versatile Disc) or the like. An optical information recording medium.
The former DVD-RAM / WO disk, DVD-R disk, and DVD + R disk are DVDs that can be written only once. That is, it is a DVD Write Once disc on which data can be recorded but cannot be rewritten. The latter DVD-RAM disc, DVD-RW disc, and DVD + RW disc are DVDs that can be written multiple times.
[0016]
Next, a basic operation of the optical disk device will be described.
The optical disc 1 is driven to rotate by a spindle motor 2. The spindle motor 2 is controlled by a motor driver 14 and a servo unit 15 so that the linear velocity or the angular velocity becomes constant. This linear velocity or angular velocity can be changed stepwise.
The optical pickup 3 incorporates a well-known semiconductor laser, an optical system, a focus actuator, a track actuator, a light receiving element, and a position sensor, not shown, and irradiates the optical disc 1 with laser light LB. The optical pickup 3 can be moved in the sledge direction by a seek motor. In these focus actuator, track actuator, and seek motor, the spot of the laser beam LB is located at a target location on the optical disc 1 by the motor driver 14 and the servo unit 15 based on signals obtained from the light receiving element and the position sensor. Is controlled as follows.
[0017]
Then, at the time of reading, the reproduction signal obtained by the optical pickup 3 is amplified by the read amplifier 10 and binarized, and then input to the DVD decoder 11. The input binary data is subjected to 8/16 demodulation in the DVD decoder 11. It should be noted that the recording data is modulated in a group of 8 bits (8/16 modulation). In this modulation, 8 bits are converted to 16 bits. In this case, the combined bits are attached so that the number of “1” and “0” up to that time are equal on average. This is called “DC component suppression”, and the slice level fluctuation of the DC-cut reproduction signal is suppressed.
[0018]
The demodulated data is subjected to deinterleaving and error correction. Thereafter, the data is input to the DVD-ROM decoder 12, and further error correction processing is performed to improve the reliability of the data. The data on which the error correction processing has been performed twice is temporarily stored in the buffer RAM 8 by the buffer manager 9 and is sent to the host computer via the ATAPI / SCSI I / F 13 in a state in which the data is prepared as sector data. Will be transferred.
In the case of music data, data output from the DVD decoder 11 is input to the D / A converter 16, and is extracted and output as an analog audio signal Audio.
[0019]
At the time of writing, data sent from the host computer through the ATAPI / SCSI I / F 13 is temporarily stored in the buffer RAM 8 by the buffer manager 9. Thereafter, the write operation is started. In this case, the laser spot needs to be positioned at the write start point before that. In the case of a DVD + RW disc and a DVD + R disc, this point is determined by a wobble signal which is previously formed on the optical disc 1 by meandering tracks.
It should be noted that the above location is obtained by land prepits instead of a wobble signal on DVD-RW discs and DVD-R discs, and by prepits on DVD-RAM discs and DVD-RAM / WO discs.
[0020]
A wobble signal on a DVD + RW disc or a DVD + R disc contains address information called ADIP (ADless In Pre-groove), and this information is extracted by the ADIP decoder 7. The synchronizing signal generated by the ADIP decoder 7 is input to the DVD encoder 5 to enable data to be written to an accurate position on the optical disk 1. The data in the buffer RAM 8 is added with an error correction code and interleaved by the DVD-ROM encoder 6 and the DVD encoder 5, and is recorded on the optical disc 1 via the laser controller 4 and the optical pickup 3.
Further, a configuration may be employed in which address information is obtained from land pre-pits or pre-pits.
[0021]
FIG. 2 is a schematic diagram of an information processing apparatus using the optical disk device shown in FIG.
In this information processing apparatus, an optical disk device 20 having the above configuration is connected to a host computer 21 including a main controller 22, an interface 23, a storage device 24, an input device 25, a display device 26, and the like.
The main controller 22 includes a microcomputer, a main memory (both are publicly known, and is not shown), and controls the entire host computer 21.
The interface 23 is a two-way communication interface with the optical disc device 20 and conforms to a standard interface such as ATAPI and SCSI. This interface is connected to the ATAPI / SCSI I / F 13 of the optical disk device 20. The connection between the interfaces may be not only a cable connection using a communication line such as a communication cable (for example, a SCSI cable), but also a wireless connection using infrared rays or the like.
[0022]
The storage device 24 is a hard disk drive (HDD) or the like, and stores a program described in a code readable by the microcomputer of the main control device 22. When the drive power supply of the information processing device is turned on, the program is loaded into the main memory of the main control device.
The display device 26 includes a display unit (not shown) such as a CRT, a liquid crystal display (LCD), and a plasma display panel (PDP), and displays various information from the main control device 22.
The input device 25 includes, for example, at least one input medium (not shown) of a keyboard, a mouse, a pointing device, and the like, and notifies the main control device 22 of various information input by a user. The information from the input medium may be input by a wireless method. Further, as a unit in which the display device 26 and the input device 25 are integrated, for example, there is a CRT with a touch panel.
The information processing apparatus has an operating system (hereinafter referred to as “OS”). All devices constituting the information processing apparatus are managed by the OS.
[0023]
Next, the format of the optical disc 1 will be described.
For example, the recording format of a DVD + R disc includes a single session (one session) and a multi-session (multiple sessions).
The session is divided into intro (the first session is called lead-in), data zone, and closure (but the last session is lead-out) areas, and the data zone is further composed of areas called fragments. Is done.
[0024]
When the last session is not closed at the time of data recording, that is, when no closure or lead-out is recorded, the fragment management information such as the number of fragments, the start address, and the end address is stored in the SDCB (Session Disc Control) in the intro. • Block) fragment item. In the DVD + R disc system, the disc can be ejected before the session is closed.
Whether the session is closed can be determined by checking whether the session has a closure or a lead-out. That is, if no closure or lead-out is recorded, the session is determined to be an open session. The SDCB is also copied and recorded in the closure or lead-out when the session is closed.
[0025]
The fragment management information is recorded in the SDCB before and after data is recorded in the fragment as data is recorded in the fragment.
More specifically, in normal data recording, after recording data in a fragment, management information of the recorded fragment is recorded in a section called a fragment item in the SDCB.
However, when the data length to be recorded in the fragment is known, the actual data may be recorded after the fragment management information is recorded. Further, when recording is performed after a certain fragment is reserved, the management information of the reserved fragment may be recorded in a fragment item in the SDCB first.
[0026]
Therefore, the "final area" according to the first and second aspects of the present invention is: (1) If the management information is recorded before recording data in the fragment, the last fragment recorded in the management information Or (2) when the management information is recorded after recording the data in the fragment, the fragment is a fragment next to the last fragment recorded in the management information.
The determination as to whether or not the fragment is the last area where data is continuously recorded is made by specifically determining the maximum number of fragments in the SDCB in the intro of the open session (the last session in which the session is not closed). (Fragment number in fragment item) and the number of actually reproduced fragments are compared.
[0027]
If the number of fragments and the number of fragments that can be actually reproduced (including a part that can be reproduced even when the reproduction can be performed only halfway) are the same, the largest fragment is defined as the “final region”.
On the other hand, if the number of fragments that can be actually reproduced (including the part that can be reproduced even if the reproduction can only be performed halfway) is larger than the fragment number, the fragment next to the fragment corresponding to the maximum fragment number is deleted. It is referred to as “final area”.
Further, when there is a reserved fragment, the continuity of data may be interrupted in the middle of the fragment, so that the fragment may be set as the “final area”.
[0028]
Further, the "address information pre-recorded when data is not recorded" according to claim 4 of the present invention refers to an ADIP (Address In Pre-Address) included in a meandering groove (wobble) of a track in an optical information recording medium. groove).
In particular, when the power is turned off during the recording of one sector, which is the minimum unit of recording, the position cannot be detected by the address information (the address information is recorded in the sector) included in the structure of the recorded data. Therefore, position detection by ADIP is performed, and dummy data recording is performed from a position where recording is interrupted. The normal data recording operation is performed while performing address detection by ADIP.
[0029]
Next, the operation of the disk repair process of the optical disk device will be described.
The operation of the disk restoration process is performed by a control program stored in the ROM 17 in the controller of the optical disk device, causing the CPU 18 in the controller to execute the program, and the CPU 18 giving a command to each block of the optical disk device. Things.
FIG. 3 to FIG. 6 are flowcharts showing a disk repair process of the optical disk device.
As shown in FIG. 3, when the optical disk is mounted, the CPU 18 detects the information of the last session to check the state of the optical disk, and starts the disk repair process.
[0030]
Then, in step (indicated by "S" in the figure) 1, it is determined whether or not the session is an open session (it is determined whether or not the session is closed). If no closure or lead-out is recorded in the last session, It is determined that the session is an open session (the session is not closed), and the process proceeds to step 2. If a closure or lead-out is recorded, it is determined that the session is a closed session (the session is closed), and there is no need to perform a disk repair process. Therefore, as shown in FIG. finish.
If it is determined in step 1 that the session is an open session, in step 2 the data in the final fragment is reproduced based on the fragment management information recorded in the SDCB fragment item in the intro. Note that which fragment corresponds to the final fragment is determined as described above.
[0031]
Then, in step 3, it is determined whether or not the data is interrupted in the middle. If the data reproduction signal (for example, RF signal) is not interrupted during data reproduction, the process proceeds to step 11 in FIG. If the RF signal is interrupted, for example, it is determined in step 4 that there is a data unrecorded portion in which no data is recorded in the final fragment, the start address of the unrecorded portion is obtained from ADIP, and the start address is obtained. Hold.
Next, in step 5, it is determined whether or not management information (start address, end address) regarding the last fragment is recorded in the fragment item of the SDCB.
[0032]
If it is determined in step 5 that the management information regarding the last fragment has not been recorded, the process proceeds to step 15 in FIG. 5. If the management information regarding the last fragment has been recorded, the data stored in step 6 is not stored. Dummy data is recorded from the start address of the recording portion to the end address of the last fragment. The process of step 6 is used when recording the management information of the fragment in the SDCB prior to recording the data in the fragment when the data length to be recorded in the fragment is known.
On the other hand, when it is determined in step 5 that the management information of the final fragment is not recorded in the fragment item in the SDCB (that is, the data is recorded on the fragment, and then the management information on the fragment is recorded). In step 15 of FIG. 5, it is determined whether or not data is interrupted in the middle of an ECC block (16 sectors) as a recording unit.
[0033]
If it is determined in step 15 that the data is interrupted in the middle (there is a data unrecorded portion), then in step 16 the unrecorded portion of the data is set so that the data recording unit is the ECC block unit. The dummy data is recorded until one ECC block is added to the recorded data.
In this way, the recording unit rule that data must be recorded in ECC blocks can be maintained, and additional data can be added even after the disk is restored.
After the data unrecorded part and the recorded part are combined into one ECC block, further dummy data may be recorded in ECC block units. However, in order to avoid wasting the recording area, data is not recorded. It is desirable to keep the portion and the recorded portion together in one ECC block.
[0034]
After the dummy data is recorded, in step 17 the fragment management information of the fragment is stored in the fragment item in the SDCB, that is, the fragment number, the fragment start address (corresponding to the start address of the data recording portion), and the fragment end address (dummy data recording). (Equivalent to the end address of the portion).
On the other hand, if it is determined in the step 15 that the data is not interrupted in the middle of the ECC block, the management information of the fragment, ie, the fragment item in the SDCB, The fragment number, the start address of the fragment (corresponding to the start address of the data recording portion), the end address of the fragment (corresponding to the end address of the data recording portion), and the like are recorded. If it is determined in step 15 that the data is not interrupted in the middle of the ECC block, the process may proceed to step 17 after recording the dummy data.
[0035]
If it is determined in step 3 of FIG. 3 that the data reproduction of the last fragment is not interrupted, the process proceeds to step 11 of FIG. 6 to determine whether or not a reserved fragment exists. Here, the reserved fragment means that the area to be recorded is reserved as a reserved fragment and its address information and the like are recorded in the SDCB before the actual data recording. Refers to a fragment. This area does not always exist at the last position (outermost circumference) of the area where data recording has been performed. Therefore, data recording may be performed earlier in the outer peripheral portion than in the reserved fragment. For this reason, after recording the outer peripheral portion of the reserved fragment first, if the reserved fragment is recorded, the recording may be interrupted due to power cutoff or the like, and steps 11 to 14 are processes taking this case into consideration. is there.
[0036]
If there is a reserved fragment in the determination in step 11, the data of the reserved fragment is reproduced in step 12, and it is determined in step 13 whether the data is interrupted halfway. That is, whether or not an unrecorded portion of the data exists in the reserved fragment is checked based on whether or not the data reproduction signal is interrupted halfway. If it is determined in step 13 that the data reproduction signal is interrupted and there is an unrecorded portion of the data, in step 14 the start address of the unrecorded portion is obtained from ADIP and held, and the held start address information is stored. The dummy data is recorded in the data unrecorded portion of the reserved fragment by the end address information of the fragment based on the management information of the reserved fragment.
[0037]
After the processing of step 6 and step 14 or step 17 is completed, the process proceeds to step 7 of FIG. 4 to record the repair information in the SDCB. This restoration information is recorded in a predetermined section such as a reservation section in the SDCB or a reservation section in the fragment item, and indicates that the session has been repaired, that a certain fragment has been repaired, or that the repaired area has started. Either or each of the information of the address and the end address or the like is recorded. When the information indicating that the session has been repaired is adopted as the repair information, use (reproduction) can be disabled in session units. When the fact that the fragment has been repaired is adopted as the repair information, use (reproduction) can be made impossible in fragment units. Further, when the repair information is recorded in these units, the capacity for recording the repair information is smaller than when recording the address information. Furthermore, when the information of the start address and the end address of the repaired area is adopted as the repair information, use (reproduction) of the repaired area can be disabled.
[0038]
If it is determined in step 11 of FIG. 6 that there is no reserved fragment, or if it is determined in step 13 that there is no break in the data in the reserved fragment, or the repair information is recorded in the SDCB in the process of step 7 of FIG. If so, it is determined in step 8 whether or not the session is to be closed (whether or not to close). If the session is not to be closed (not closed), the disk restoration process is terminated as it is, and if the session is to be closed (closed), a lead-out or closure is recorded in step 9. Here, when recording a closure, additional recording is possible, and when recording a lead-out, additional recording is not possible. After the processing in step 7, the judgment processing in step 8 may not be performed, that is, step 8 may be skipped and the closure or lead-out may be recorded in step 9. In this case, the closed session can be disabled.
If it is determined in step 1 that the session is a closed session, if it is desired to add data without closing the session in step 8, or if the session is closed in step 9, the disk repair process ends.
[0039]
Next, another embodiment of the present invention will be described.
FIG. 7 is a block diagram showing a configuration example of a DVD + R drive device according to another embodiment of the present invention.
This DVD + R drive device is an optical disk device for recording and reproducing data on and from a DVD + R disk 42, and includes a motor 31 for rotating the DVD + R disk 42 at an arbitrary rotation speed, and a rotation control unit 32 for controlling the motor 31. ing. Further, an optical pickup 33 for irradiating the DVD + R disc 42 with an optical laser, a laser drive circuit 38 for driving the optical laser of the optical pickup 33, and an actuator control unit 34 for controlling the optical pickup 33 to move in the radial direction. And a signal control unit 35 for controlling a signal from the optical pickup 33.
[0040]
A microcomputer including a CPU, a ROM, a RAM, and the like that controls the entire DVD + R drive device, such as an external interface 40 for exchanging signals with the host computer 41 and a buffer memory 37 for temporarily storing data and the like. A drive controller 36 is provided.
Further, a nonvolatile memory 39 is also connected to record information unique to the DVD + R drive device. The non-volatile memory 39 also stores a program for operating the drive controller 36 and the like, and the drive controller 36 executes the program to realize various functions according to the present invention.
[0041]
That is, the drive controller 36 examines the final fragment state of the DVD + R disc to determine whether the recording has not been completed normally, and has determined that the recording has not been normally completed by the determination means. In this case, an ECC block composed of dummy data is added to complete the fragment, the session is closed, and the function of a repair unit for repairing the session of the DVD + R disc is performed.
As the determination means, the last ECC block of the last fragment of the DVD + R disc is reproduced, and if the last ECC block cannot be reproduced normally, the presence or absence of an RF signal is checked to determine whether recording has been completed normally. It performs the function of a means for determining whether or not it is.
[0042]
Further, means for recording information indicating that the session has been repaired by the repair means in the SDCB in the lead-in area or intro area of the DVD + R disc, and information indicating that the session has been repaired by the repair means Also functions as a means for recording on the TOC of the DVD + R disc.
The drive controller 36 and the external interface 40 function as a transfer unit that transfers information indicating whether or not the session has been restored by the restoration unit to a host computer connected to the outside.
Further, the transfer unit also functions as a unit for transferring information indicating whether or not the session has been restored by a read DVD structure command to a host computer connected to the outside.
[0043]
Next, the format of a DVD + R disc on which data is recorded and reproduced by the DVD + R drive device will be described.
FIG. 8 is an explanatory diagram showing the format of a DVD + R disc.
The DVD + R disc has an inner drive area (Inner Drive Area) 50, a lead-in zone area (Lead-in Zone Area) 51, a data zone area (Data Zone Area) 52, a closure area (closure area) 53, and an intro from the inner circumference. An area (Intro Area) 54, a data zone area (Data Zone Area) 55, a lead-out zone area (Lead-out Zone Area) 56, and an outer drive area (Outer Drive Area) 57 are provided.
[0044]
The inner drive area 50 and the outer drive area 57 are calibration areas of the DVD + R drive. The lead-in zone area 51 is an area indicating the start of a session in which fragment information and the like in the session 60 are recorded. The data zone areas 52 and 55 are areas for recording user data composed of 1 to a maximum of 16 fragments. The closure area 53 is an area indicating the end of a session called a closure area before the last session. The intro area 54 is an area indicating the beginning of a session in which the second and subsequent sessions are called an intro area. The lead-out zone area 56 is an area indicating the end of a session.
[0045]
The session 60 is a unit composed of a lead-in area (an intro area for the second and subsequent sessions), a data zone area, and a lead-out area (a closure area before the last session), and can record up to 191 per disc. Area. Information on the fragments in the session 60 is recorded in the lead-in zone area 51 and the intro area 54. Recording and reproduction of data on a DVD are performed in ECC block units. One ECC block has 16 sectors.
[0046]
Next, an operation process according to claim 6 of the present invention in the DVD + R drive device will be described.
FIG. 9 is a flowchart showing an operation process according to claim 6 of the present invention in the DVD + R drive device shown in FIG.
FIG. 10 is a disk layout diagram for explaining the processing.
When the DVD + R disc is inserted, the drive controller 36 checks the state of the last fragment recorded in the last session at step (indicated by “S” in the figure) 21 as shown in FIG. It is determined whether or not the recording has not been completed normally. If the recording has not been completed normally, the process is terminated. If it is determined that the recording has not been completed normally, the ECC block composed of the dummy data is determined in step 23. The fragment is completed by appending the data, the session is closed (closed) in step 24, the session of the DVD + R disc is restored, and the process ends.
[0047]
For example, when a power supply or the like occurs during recording of the final fragment and a DVD + R disc whose recording is interrupted by the final fragment as shown in FIG. It is determined that the recording of the final fragment has not been completed normally on the basis of the above, and as shown in FIG. 10B, the part of the final fragment that is not enough in the final ECC block and the dummy ECC block are added with dummy data. Close and repair the session and end this process. If the recording of the last fragment has been completed normally, it is determined that the session need not be repaired, and the process ends without performing any operation.
In this way, even if an unexpected power shutdown or the like occurs during data recording, the session that was being recorded has been restored, so that the last recorded fragment can be reproduced. Become. Further, data can be additionally recorded from the next session, so that the DVD + R disc is not wasted.
[0048]
Next, an operation process according to claim 7 of the present invention in the DVD + R drive device will be described.
In the examination of the final fragment state of the inserted DVD + R disc, if the recording is interrupted due to an unexpected power cutoff during data recording, the RF signal is interrupted halfway, and the final ECC of the fragment concerned is interrupted. Blocks may not be played correctly. Therefore, it may be determined whether or not the last fragment is recorded normally, based on whether or not the last ECC block of the last fragment can be normally reproduced.
[0049]
If power is cut off during data recording on a DVD + R disc into which the DVD + R drive is inserted, the DVD + R disc will be in a state as shown in FIG. Attempting to reproduce the last ECC block of the last fragment in such a state results in an error. There is no RF signal after the place where the recording is interrupted.
Therefore, when checking the last fragment state of the DVD + R disc inserted in the DVD + R drive device in the above-described processing, the drive controller 36 reproduces the last ECC block of the last fragment of the DVD + R disc, and the last ECC block is normally read. If the reproduction is not successful, it is determined whether or not the recording has been normally completed by checking the presence or absence of the RF signal.
In this way, it is possible to reliably determine whether the last fragment of the DVD + R disc is normally recorded.
[0050]
Next, an operation process according to claim 8 of the present invention in the DVD + R drive device will be described.
In the session restored by the above processing, it is not known as to whether or not the session has been restored. Since the data included in the restored session is only recorded halfway, the data lacks reliability.
Therefore, it may be possible to determine whether or not the session has been repaired.
After restoring the session, the drive controller 36 records session restoration information indicating that the session has been restored in the SDCB in the lead-in area or intro area of the DVD + R disc.
[0051]
FIG. 11 is a diagram showing the format of the SDCB in the lead-in area or the intro area of the DVD + R disc.
The SDCB records the session repair information at the position of the byte 42 as shown in FIG. By reproducing the session restoration information, it is possible to know whether the session has been restored.
In this way, whether or not the session has been repaired can be known by playing the SDCB in the lead-in area or the intro area.
[0052]
Next, an operation process according to claim 9 of the present invention in the DVD + R drive device will be described.
The session restoration information may be recorded in the TOC.
FIG. 12 is a diagram showing the format of the TOC block.
FIG. 13 is a diagram showing the format of the TOC item.
FIG. 14 is an explanatory diagram of additional writing of a TOC block.
The TOC is composed of one ECC block (TOC Blocks) as shown in FIG. 12, and records information of each session in a TOC item (TOC Item). As shown in FIG. 14, when a session is added, a new TOC item in which a TOC item in which previous session information is recorded as shown in FIG. 13 and a TOC item in which information of the added session is recorded is added. Add a block.
[0053]
Therefore, the drive controller 36 records the session restoration information in the byte (Byte) 11 of the TOC item as shown in FIG. By reproducing the session restoration information, it is possible to easily know whether or not the session has been restored.
In this way, whether or not the session has been repaired can be known by playing back the TOC.
[0054]
Next, an operation process according to claim 10 of the present invention in the DVD + R drive device will be described.
In the session restored as described above, generally, in the file system format, file management information is recorded at the beginning of the session, and thereafter, the file body is recorded. Therefore, the host computer can reproduce the file itself by reproducing the file management information.
However, since the data included in the restored session is only recorded halfway, the file management information is correctly recorded, but the file itself does not exist or it seems that the file is interrupted halfway. I will. In such a case, if an attempt is made to reproduce an arbitrary file, there is a problem that the file cannot be reproduced because the main body of the file does not actually exist.
[0055]
Therefore, it is preferable that the DVD + R drive device informs the host computer whether or not the session has been restored.
After the session restoration processing, the drive controller 36 transfers session restoration information indicating whether or not the session has been restored to the externally connected host computer 41 via the external interface 40.
In this way, since the host computer can know whether or not the session has been repaired, it is possible to avoid the problem that there is no file body that should exist in the file management information.
[0056]
Next, an operation process according to claim 11 of the present invention in the DVD + R drive device will be described.
When transmitting the session repair information to the host computer, an interface command for obtaining information of the SDCB or TOC may be used.
The drive controller 36 transfers the session restoration information to a host computer connected to the outside by a read DVD structure command (ReadDVD Structure command). Therefore, the host computer can know information on whether or not the session has been repaired by the command.
[0057]
FIG. 15 shows the format of the read DVD structure command.
The read DVD structure command (Read DVD Structure command) can obtain information such as TOC and SDCB by specifying a DCB Content Descriptor (DCB Content Descriptor) area and a format (Format) area. Therefore, the host computer can also obtain the session repair information by the command.
As a specific example, a command for obtaining the SDCB information of session 2 is as follows.
[0058]
CDB = AD 00 53 44 43 00 02 30 FF FF 00 00
DCB Content Descriptor: 53444300h (ASCII Code “SDC”)
Session Number: 2
Format: 30h
Allocation Length: FFFF
AGID: 00
[0059]
The host computer issues the command to the DVD + R drive device, whereby the SDCB information of session 2 is transferred from the DVD + R drive device to the host computer.
In this way, the host computer can know whether or not the session has been repaired by reproducing the information of the TOC, thereby avoiding the problem that there is no file body that should exist in the file management information. it can.
[0060]
【The invention's effect】
As described above, according to the optical information recording apparatus, the optical information recording method, and the optical disk apparatus of the present invention, data can be recorded but cannot be rewritten. Even when an unexpected power interruption occurs, the session that was being recorded can be restored, reproduced, and additionally recorded.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of an optical disc device according to an embodiment of the present invention.
FIG. 2 is a schematic diagram of an information processing apparatus using the optical disk device shown in FIG.
FIG. 3 is a flowchart showing a disk repair process of the optical disk device.
FIG. 4 is a flowchart showing a process subsequent to FIG. 3;
FIG. 5 is a flowchart showing a process that is continued from FIG. 3;
FIG. 6 is a flowchart showing a process further continued from FIG. 3;
FIG. 7 is a block diagram illustrating a configuration example of a DVD + R drive device according to another embodiment of the present invention.
FIG. 8 is an explanatory diagram showing a format of a DVD + R disc.
FIG. 9 is a flowchart showing an operation process according to claim 6 of the present invention in the DVD + R drive device shown in FIG. 7;
FIG. 10 is a disk layout diagram for describing the processing in FIG. 9;
FIG. 11 is a diagram showing an SDCB format in a lead-in area or an intro area of a DVD + R disc.
FIG. 12 is a diagram showing a format of a TOC block.
FIG. 13 is a diagram showing a format of a TOC item.
FIG. 14 is an explanatory diagram of additional writing of a TOC block.
FIG. 15 is a diagram showing a format of a read DVD structure command.
[Explanation of symbols]
1: Optical disk 2: Spindle motor
3: Optical pickup 4: Laser controller
5: DVD encoder 6: DVD-ROM encoder
7: ADIP decoder 8: Buffer RAM
9: Buffer manager 10: Read amplifier
11: DVD decoder 12: DVD-ROM decoder
13: ATAPI / SCSI interface (I / F)
14: Motor driver 15: Servo unit
16: D / A converter 17: ROM
18: CPU 19: RAM
20: Optical disk device 21, 41: Host computer
22: Main controller 23: Interface
24: Storage device 25: Input device
26: Display device 31: Motor
32: rotation control unit 33: optical pickup
34: Actuator control unit 35: Signal control unit
36: Drive controller 37: Buffer memory
38: Laser drive circuit 39: Non-volatile memory
40: External interface 42: DVD + R disc
50: Inner drive area 51: Lead-in zone area
52: Data zone area 53: Closure area
54: Intro area 55: Data zone area
56: Lead-out zone area 57: Outer drive area
60: Session

Claims (11)

By irradiating light, data can be recorded, but the recording area of the optical information recording medium, which cannot be rewritten, is divided into one or more sessions, divided into a plurality of areas in the session, and In an optical information recording apparatus that records data in a predetermined recording unit and records management information in each area along with data recording in each area,
Data unrecorded portion determining means for determining whether there is a data unrecorded portion in which no data is recorded in the last region where data recording is continuously performed in the region,
Recording means for recording dummy data in the data unrecorded portion when the data non-recorded portion determining means determines that the data unrecorded portion exists. . The optical information recording device according to claim 1,
The data unrecorded portion determining means determines whether or not the session is closed, and when the determining means determines that the session is not closed, the A reproducing means for reproducing data recorded in a final area where data recording is continuously performed; and a reproduction area when the reproduction signal cannot be obtained during data reproduction by the reproducing means. And a determining means for determining that there is the data unrecorded portion. The optical information recording device according to claim 1 or 2,
The recording unit, when a data unrecorded portion occurs in the middle of the predetermined recording unit, a dummy data recording unit that records dummy data in the data unrecorded portion so as to be the predetermined recording unit, An optical information recording apparatus, comprising: session closing means for closing the session after dummy data recording by the dummy data recording means. The optical information recording device according to any one of claims 1 to 3,
The optical information recording medium has address information recorded in advance when data is not recorded, and the detection of the data unrecorded portion is performed based on the address information. Recording device. By irradiating light, data can be recorded, but the recording area of the optical information recording medium, which cannot be rewritten, is divided into one or more sessions, divided into a plurality of areas in the session, and In an optical information recording method of recording data in a predetermined recording unit and recording management information of each area along with data recording in each area,
It is determined whether or not the session of the recording area is closed. If it is determined that the session is not closed, the last of the areas in the session where data recording is continuously performed. When the data recorded in the area is reproduced, and a reproduction signal cannot be obtained during the reproduction of the data, it is determined that the data unrecorded part is present in the final area, and the data non-recorded part is present. And recording the dummy data in the data unrecorded portion so as to be the predetermined recording unit, and closing the session after the recording of the dummy data. In an optical disk device for recording data on a DVD + R disk,
Judgment means for examining the final fragment state of the DVD + R disc to judge whether or not the recording has not been completed normally. If the judgment means has judged that the recording has not been ended normally, it is constituted by dummy data. An optical disc device, further comprising: a repair unit that adds a selected ECC block to complete a fragment, closes a session, and repairs a session of a DVD + R disc. The optical disk device according to claim 6,
The judging means reproduces the last ECC block of the last fragment of the DVD + R disc, and if the last ECC block cannot be reproduced normally, checks whether there is an RF signal to determine whether recording has been completed normally. An optical disc device characterized by means for judging whether or not the optical disc drive is in use. The optical disk device according to claim 6 or 7,
An optical disc apparatus, further comprising means for recording information indicating that the session has been restored by the restoration means in an SDCB in a lead-in area or an intro area of the DVD + R disc. The optical disk device according to claim 6 or 7,
An optical disc device, further comprising means for recording information indicating that the session has been restored by the restoration means in the TOC of the DVD + R disc. The optical disk device according to claim 8, wherein
An optical disk device, further comprising a transfer unit that transfers information indicating whether or not the session has been restored by the restoration unit to an externally connected host computer. The optical disc device according to claim 10,
The optical disc apparatus according to claim 1, wherein the transfer means is means for transferring information indicating whether the session has been restored by a read DVD structure command to a host computer connected to the outside.

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