JP2005190617A - Recording and reproducing device and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent erasing of even reproducible data when formatting a storage medium which stores 1st management information, a 1st main data managed by the 1st management information, 2nd management information managed by the 1st management information, and 2nd main data managed by the 2nd management information. <P>SOLUTION: When errors are detected only in the 2nd management information, the disk is initialized only for the 2nd management information. Accordingly, it is possible to save the reproducible data managed only by the 1st management information without erasing. When any error is found only in the 2nd management information, a similar initialization is carried out as above by input operations. Thus, the readable data by other recording and reproducing devices can be saved without erasing as in the case where initialization is performed automatically. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention provides first management information, first main data managed by the first management information, second management information managed by the first management information, and the second management. The present invention relates to a recording / reproducing apparatus that records and reproduces data on a storage medium that stores second main data managed by information, and a method thereof.

Japanese Patent Laid-Open No. 11-224478

For example, various disc media such as CD (Compact Disc), MD (Mini Disc), DVD (Digital Versatile Disc), Blu-ray Disc (Blu-Ray Disc) have been developed, and various data recording and playback such as audio data, video data, etc. Used in the system.
For example, Patent Document 1 discloses an example in which a disk medium as an MD is used in an audio data recording / reproducing system.

Conventionally, some recording / reproducing apparatuses execute a format process so that a loaded disk medium can be recorded / reproduced by the recording / reproducing apparatus.
In such a recording / reproducing apparatus, as a result of performing management information and the like read processing on the loaded medium, when necessary data cannot be read and recording / reproduction on this medium cannot be performed, Some of them are designed to perform the formatting process as described above. That is, for example, when a part of management information is destroyed and recording / reproduction on the medium is impossible, recording / reproduction on the medium is performed by creating a blank medium state by initializing the management information. It is made to return to the state which becomes possible.

By the way, in recent years, as the use of disk media for various purposes has become common, data other than data that can be recorded and played back by a dedicated recording and playback device such as audio data and video data, for example, on the same disk media In addition, it is assumed that computer use data that can be used only on the information processing apparatus side such as a personal computer is stored.
For example, it is assumed that an MD recording / playback device is connected to a personal computer or the like to operate as a general-purpose storage device, and audio data that can be recorded / played by a single recording / playback device on an MD disc; It is assumed that computer use data can be stored simultaneously.

In this way, for example, when it is assumed that a recording / reproducing apparatus for an MD disc is used as a general-purpose storage device such as a personal computer, the management information about data stored on the disc is, for example, a FAT system or the like. It is conceivable to employ management information used on the computer side.
On the other hand, for example, as the management information of audio data that can be recorded / reproduced by a single recording / reproducing apparatus, it is conceivable to use unique management information suitable for operation as a conventional audio system, for example. . For example, in a conventional MD system, a unique management form such as TOC (Table Of Contents) is adopted.

In this case, assuming that the audio data stored on the disc can also be used on the personal computer side, the audio data is managed by its own management information as described above, such as FAT. It is conceivable to manage the management information with compatible management information. That is, on the disc in this case, data directly managed by management information such as FAT, and data managed by management information for audio system managed by such management information such as FAT Will come to exist.
With such a management form, for example, on the personal computer side, all data on the disc can be recognized based on the FAT information stored on the disc.
The recording / reproducing apparatus can also record / reproduce audio data by referring to the above-mentioned unique management information for the audio system specified from the FAT.

Here, assuming a disk medium in which data is managed by two different management information as described above, it is assumed that the format process is executed as described above.
Also in this case, if necessary data such as management information cannot be read, the recording / reproducing apparatus cannot record / reproduce the audio data to / from the disc, and the format processing as described above is executed accordingly. Then, it is conceivable to return the disc to a state in which recording / playback is possible.
However, in this case, a state in which a part of necessary data as described above is not reproduced and recording / reproduction of audio data cannot be performed is performed in the first management such as FAT of the disk loaded in the recording / reproducing apparatus. There are a case where the information cannot be read and a case where the second management information as the management information for the audio system cannot be read. That is, in this case, for example, all data on the disc managed by the first management information cannot be reproduced, and only audio data managed by the second management information cannot be reproduced. Can be considered.

  At this time, if the area where data reproduction is impossible as described above is only the area where the audio data is stored, if the format process is performed and the disk is returned to the blank disk state, the first management is performed. Even other reproducible computer use data managed by the information will be deleted. In other words, when a disc whose data is managed by two different management information as described above is assumed, if the recording / reproducing apparatus 1 simply performs format processing in response to the fact that audio data is not reproduced, the data can be reproduced. This causes a problem of erasing data.

Further, in a disk system that performs recording / reproduction on a disk medium, such as an MD system, a certain apparatus may be used due to a compatibility problem between the disk medium and the apparatus, such as individual differences in reading accuracy of an optical system provided in the recording / reproducing apparatus. In general, there may be a case in which a disc medium that could not be reproduced can be reproduced by another device.
Considering such a case, assuming the case where the above-described formatting process is executed, for example, the formatting process is automatically executed in response to the detection of a portion that cannot be reproduced from the disc as described above. As a result, data may be erased even from a disc that can be read by this recording / reproducing apparatus. In other words, in a system that executes a formatting process in response to the detection of a portion that cannot be read from the disk, there is a possibility that even reproducible data is erased.

  Accordingly, an object of the present invention is to prevent a situation in which even reproducible data is erased by a formatting process for a storage medium.

To this end, the recording / reproducing apparatus of the present invention includes first management information, first main data managed by the first management information, and second management managed by the first management information. Recording and reproducing means for recording and reproducing data is provided for a storage medium that stores information and second main data managed by the second management information.
In addition, when an error in the first management information is detected in the recording / reproducing means, the recording / reproducing means is controlled so that the storage medium is initialized, and the second management information is When only an error is detected, a control means for controlling the recording / reproducing means is provided so that only the second management information is initialized.

  In the recording / reproducing apparatus of the present invention, the recording / reproducing means includes an optical head and is configured to perform recording and reproduction on the storage medium that is an optical disk medium, and the control means includes the recording medium. When the error of only the second management information is detected in the reproducing means, the recording / reproducing means is controlled so that only the second management information is initialized according to the operation input. Composed.

In the present invention, the recording / reproducing method is as follows.
That is, the first management information, the first main data managed by the first management information, the second management information managed by the first management information, and the second management information. A recording / reproducing procedure for recording and reproducing data is executed for the storage medium storing the second main data to be managed.
In addition, when an error in the first management information is detected by the recording / playback procedure, control is performed so that the storage medium is initialized, and an error only in the second management information is detected. When it is detected, a control procedure for performing control so that only the second management information is initialized is executed.

  Furthermore, in the recording / reproducing method of the present invention, when the storage medium is an optical disk medium without a built-in optical head, the control procedure detects an error of only the second management information by the recording / reproducing procedure. In such a case, the control is performed so that only the second management information is initialized according to the operation input.

According to the present invention, the first management information, the first main data managed by the first management information, the second management information managed by the first management information, and the first When an error of only the second management information is detected for the storage medium storing the second main data managed by the management information of 2, the initialization of only the second management information is executed. The
Also, according to the present invention, such initialization for only the second management information is executed in response to an operation input when an error of only the second management information is detected. .

  Thus, according to the present invention, the first management information, the first main data managed by the first management information, the second management information managed by the first management information, When an error of only the second management information is detected for the storage medium storing the second main data managed by the second management information, only the second management area is initialized. Therefore, when other data managed only by the first management information can be reproduced, it is possible to effectively prevent such a situation that even the reproducible data is erased. .

  In addition, as described above, the present invention executes the initialization for only the second management information according to the operation input when an error in the second management information is detected. For example, it is possible to prevent a situation in which data that can be played back by another recording / playback apparatus is automatically deleted, for example, when the format process is executed in response to the case where data is not played back. it can.

  In addition, according to the present invention, when the second management information error is detected, it can be automatically guided to initialization, so that the user can manually perform initialization accordingly. Can reduce the operation burden.

Hereinafter, embodiments of the present invention will be described in the following order.
1. 1. Configuration of recording / reproducing apparatus and disc 2. Function of system controller 3. Disk management structure 4. Operation of recording / reproducing apparatus Processing action

1. Configuration of recording / reproducing apparatus and disc

FIG. 1 is a block diagram showing an internal configuration example of a recording / reproducing apparatus 1 as an embodiment.
As an example, the recording / reproducing apparatus 1 according to this embodiment is a recording / reproducing apparatus for a mini-disc (MD) disc that is a magneto-optical disc on which data recording is performed by a magnetic field modulation method. However, not only music mini-discs that are already in widespread use, but also high-density recording that can be used for storage of various data for computer use (also called next-generation discs). It is a playback device.

Further, the recording / reproducing apparatus 1 of this example is a device capable of data communication with an external device such as a personal computer (or network) 50, for example.
For example, the recording / reproducing apparatus 1 can function as an external storage device for the personal computer 50 by being connected to the personal computer 50 via a transmission path 51 such as a USB cable. In addition, music or various data is downloaded via a personal computer 50 or connected to the network by providing a function that can be directly connected to the network, and the disc loaded in the storage unit 2 in the recording / playback apparatus 1 is downloaded. It can also be saved.

On the other hand, the recording / reproducing apparatus 1 functions as an audio device, for example, without being connected to the personal computer 50 or the like. For example, music data input from another audio device or the like can be recorded on a disc, and music data recorded on the disc can be reproduced and output.
That is, the recording / reproducing apparatus 1 of this example is an apparatus that can be used as a general-purpose data storage device by being connected to the personal computer 50 or the like, and can also be used as an audio recording / reproducing device by itself.

Here, prior to the description of the configuration of the recording / reproducing apparatus 1 of the present example, an outline of a next-generation disk by magneto-optical recording that the recording / reproducing apparatus 1 supports will be described.
First, such a next-generation disc uses a FAT (File Allocation Table) system as a file management system to record and reproduce content data such as audio data so that compatibility with current personal computers can be achieved. Is.
Further, by improving the current MD system, such as an error correction method and a modulation method, the data recording capacity is increased and the data reliability is increased.

Two types of specifications are currently being developed as recording and playback formats for next-generation discs. For the sake of explanation, these will be referred to as a first next generation MD and a second next generation MD.
The first next-generation MD is a specification that uses a disk that is exactly the same as the disk used in the current MD system, and the second next-generation MD is a disk that is used in the current MD system. The external shape is the same, but by using magnetic super-resolution (MSR) technology, the recording density in the linear recording direction is increased and the recording capacity is further increased.

In the current MD system (audio MD or MD-DATA), a magneto-optical disk having a diameter of 64 mm housed in a cartridge is used as a recording medium. The disc has a thickness of 1.2 mm, and a center hole having a diameter of 11 mm is provided at the center thereof. The cartridge has a length of 68 mm, a width of 72 mm, and a thickness of 5 mm.
In the specifications of the first and second next generation MDs, the shape of the disc and the shape of the cartridge are all the same. Regarding the start position of the lead-in area, the first and second next-generation MD disks start from a radial position of 29 mm and are the same as the disks used in the current MD system.
That is, compatibility with the conventional MD system on the outer shape is ensured.

  Regarding the track pitch, in the second next generation MD, it is considered to be 1.2 μm to 1.3 μm (for example, 1.25 μm). On the other hand, the track pitch is set to 1.6 μm in the first next generation MD that uses the disk of the current MD system. The bit length of the first next generation MD is 0.44 μm / bit, and the second next generation MD is 0.16 μm / bit. The redundancy is 20.50% for both the first and second next generation MDs.

In the second generation MD specification disk, the recording capacity in the linear density direction is improved by using a magnetic super-resolution technique. In the magnetic super-resolution technology, when a predetermined temperature is reached, the cut layer becomes magnetically neutral, and the magnetic wall transferred to the recording layer is transferred, so that a minute mark can be seen in the beam spot. It is a thing using what becomes.
Specifically, in the second generation MD disc, a magnetic layer serving as a recording layer for recording information, a cutting layer, and a magnetic layer for reproducing information are stacked on a transparent substrate. The cutting layer is an exchange coupling force adjusting layer. When the temperature reaches a predetermined temperature, the cut layer becomes magnetically neutral, and the domain wall transferred to the recording layer is transferred to the reproducing magnetic layer. As a result, minute marks can be seen in the beam spot. At the time of recording, a minute mark can be generated by using a laser pulse magnetic field modulation technique.

In the second generation MD disc, the groove is deepened and the groove is sharpened to improve detrack margin, crosstalk from the land, crosstalk of the wobble signal, and focus leakage. Yes. That is, in the second next-generation MD specification disk, the groove depth is, for example, 160 nm to 180 nm, the groove inclination is, for example, 60 degrees to 70 degrees, and the groove width is, for example, 600 nm to 700 nm.
Regarding the optical specification, in the specification of the first next generation MD, the laser wavelength λ is 780 nm, and the numerical aperture NA of the objective lens of the optical head is 0.45. Similarly, in the specification of the second next generation MD, the laser wavelength λ is 780 nm, and the aperture ratio NA of the optical head is 0.45.
As the recording method, the groove recording method is adopted for both the first and second next generation MDs. That is, the groove (groove on the disk surface of the disk) is used as a track for recording and reproduction.

Furthermore, as an error correction coding system, convolutional codes based on ACIRC (Advanced Cross Interleave Reed-Solomon Code) are used in the current MD system, but in the specifications of the first and second next generation MDs, RS A block-complete code combining a Reed Solomon-Long Distance Code (LDC) and a Burst Indicator Subcode (BIS) is used.
By adopting a block completion type error correction code, a linking sector becomes unnecessary. In an error correction method combining LDC and BIS, an error location can be detected by BIS when a burst error occurs. Using this error location, erasure correction can be performed by the LDC code.

As an addressing method, a wobbled groove method is used in which a single spiral groove is formed and wobbles as address information are formed on both sides of the groove. Such an address system is called ADIP (Address in Pregroove).
The specification of ADIP is the same as that of the current MD system. However, in the current MD system, a sector of 2352 bytes is used as an access unit for recording and reproduction, whereas the first and second next generation MDs are used. In the specification, 64 Kbytes are used as a recording / reproducing access unit (recording block).
In the current MD system, a convolutional code called ACIRC is used as an error correction code, whereas in the specifications of the first and second next generation MDs, a block completion type combining LDC and BIS. Is used.
Therefore, in the specification of the first next generation MD that uses the disk of the current MD system, the handling of the ADIP signal is made different from that in the current MD system. In the second next-generation MD, the specification of the ADIP signal is changed so as to match the specification of the second next-generation MD.

  As for the modulation method, EFM (8 to 14 Modulation) is used in the current MD system, whereas RLL (1, 7) PP (RLL) is used in the specifications of the first and second next generation MDs. Run Length Limited, PP; Parity Preserve / Prohibit rmtr (repeated minimum transition run length)) (hereinafter referred to as 1-7pp modulation). Further, the data detection method is Viterbi using partial response PR (1, 2, 1) ML in the first next generation MD and using partial response PR (1, -1) ML in the second next generation MD. It is a decoding method.

  Further, the disk drive system is CLV (Constant Linear Verocity), and the linear velocity is 2.7 m / second in the first next generation MD specification, and 1.98 m in the second next generation MD specification. Per second. In the specification of the current MD system, it is 1.2 m / second for a 60-minute disk and 1.4 m / second for a 74-minute disk.

In the specification of the first next-generation MD in which a disk used in the current MD system is used as it is, the total data recording capacity per disk is about 300 Mbytes (when an 80-minute disk is used). By changing the modulation method from EFM modulation to 1-7pp modulation, the window margin is changed from 0.5 to 0.666, and in this respect, a 1.33 times higher density can be realized.
Further, since the error correction method is a combination of BIS and LDC from the ACIRC method, the data efficiency is improved, and in this respect, 1.48 times higher density can be realized. Overall, a data capacity of about twice that of the current MD system was realized using exactly the same disk.
On the other hand, in the second-generation MD specification disk using magnetic super-resolution, the recording density is further increased in the linear density direction, and the total data recording capacity is about 1 Gbyte.
The data rate is 4.4 Mbit / sec in the first next generation MD, and 9.8 Mbit / sec in the second next generation MD.

FIG. 2A shows the configuration of the first next-generation MD disk.
The first next-generation MD disc is a diverted version of the current MD system disc. That is, a dielectric film, a magnetic film, a dielectric film, and a reflective film are laminated on a transparent polycarbonate substrate. Further, a protective film is laminated thereon.
In the first next-generation MD disk, as shown in FIG. 2A, a P-TOC (pre-mastered TOC (Table Of Contents)) area is provided in the lead-in area on the inner periphery of the disk. This is a pre-mastered area as a physical structure, and control information and the like are recorded as P-TOC information by embossed pits.

The outer periphery of the lead-in area in which the P-TOC area is provided in this way is a recordable area (a magneto-optical recording area), which is a recordable / reproducible area in which a groove is formed as a guide groove for a recording track. ing. A U-TOC (user TOC) is provided on the inner periphery of the recordable area.
The U-TOC in this case has the same configuration as the U-TOC used for recording disc management information in the current MD system. For confirmation, the U-TOC is management information that can be rewritten according to the order of tracks (audio tracks / data tracks), recording, erasing, etc. in the current MD system. The start position, end position, and mode are managed for the parts constituting the track.

  An alert track is provided on the outer periphery of the U-TOC. The alert track is a warning track on which a warning sound indicating that this disc is used in the first next generation MD system and cannot be reproduced by a player of the current MD system is recorded.

FIG. 2B shows the configuration of the recordable area of the disc of the first next generation MD specification.
As shown in FIG. 2B, a U-TOC and an alert track are provided at the beginning (inner circumference side) of the recordable area. In the area including the U-TOC and the alert track, the data is modulated by EFM and recorded so that it can be reproduced by a player of the current MD system.
An area where data is modulated and recorded by 1-7pp modulation of the next generation MD1 system is provided on the outer periphery of the area where the data is modulated and recorded by the EFM modulation. The area where data is modulated and recorded by EFM modulation and the area where data is modulated and recorded by 1-7pp modulation are separated by a predetermined distance, and a guard band is provided. .
Since such a guard band is provided, it is possible to prevent a malfunction from being caused by mounting the disc of the first next generation MD specification on the current MD player.

A DDT (Disc Description Table) area and a secure track are provided at the beginning (inner circumference side) of an area where data is modulated and recorded by 1-7pp modulation. The DDT area is provided for performing a replacement sector process for a physically defective sector (recording block).
A unique ID (UID) is further recorded in the DDT area. The UID is an identification code unique to each recording medium, and is based on a predetermined random number, for example.
The secure track stores information for protecting the content.

Furthermore, a FAT (File Allocation Table) area is provided in an area where data is modulated and recorded by 1-7pp modulation. This FAT area is an area for managing data in the FAT system.
The FAT system performs data management conforming to the FAT system used in general-purpose personal computers. The FAT system performs file management by a FAT chain using a directory indicating entry points of files and directories at the root and a FAT table in which FAT cluster connection information is described.
In such a first-generation MD specification disc, the U-TOC area has information on the start position of the alert track and the start position of the area where the data is modulated by 1-7pp modulation and recorded. This information is recorded.

Here, when the first next-generation MD disc having the above-described configuration is mounted on the player of the current MD system, the U-TOC area is read, and the position of the alert track is known from the U-TOC information. The alert track is accessed and the playback of the alert track is started. In the alert track, a warning sound is recorded indicating that this disc is used in the first next generation MD system and cannot be reproduced by a player of the current MD system.
This warning sound informs that this disc cannot be used with the current MD system player.
Note that the warning sound in this case may be a warning in a language such as “cannot be used with this player”. Of course, a buzzer sound may be used.

  On the other hand, when the disc of the first next generation MD is mounted on the player compliant with the first next generation MD, the U-TOC area is read, and the data is 1-7pp modulated from the U-TOC information. The start position of the recorded area is known, and the above-mentioned DDT, secure track, and FAT area are read. As described above, in the 1-7pp modulation data area, data management is performed by the FAT system, not by the U-TOC.

Next, FIG. 3A shows a configuration of a second next-generation MD disk.
Also in this case, the disk is formed by laminating a dielectric film, a magnetic film, a dielectric film, a reflective film on a transparent polycarbonate substrate, and a protective film on the upper layer.
In the case of the second next-generation MD disc, as shown in the figure, control information is recorded in the lead-in area on the inner periphery of the disc by an ADIP signal.
In the second next-generation MD disc, the lead-in area is not provided with a P-TOC by embossed pits, and instead, control information by an ADIP signal is used. The recordable area starts from the outer periphery of the lead-in area, and is a recordable / reproducible area in which a groove is formed as a guide groove for a recording track. In this recordable area, data is modulated and recorded by the 1-7 pp modulation method.

Whether a certain disk is the first next generation MD1 or the second next generation MD can be determined from, for example, lead-in information.
That is, if a P-TOC due to an embossed pit is detected in the lead-in, it can be determined that the disc is the current MD or the first next-generation MD. If control information based on the ADIP signal is detected in the lead-in and the P-TOC due to the embossed pit is not detected, it can be determined that the second next-generation MD.
Note that the determination of the first and second next-generation MDs is not limited to such a method. It is also possible to discriminate from the phase of the tracking error signal between on-track and off-track. Of course, a detection hole for disc identification may be provided in the cartridge or the like.

As the configuration of the recordable area of the disc of the second next generation MD specification, as shown in FIG. 3B, an area where data is modulated and recorded by the 1-7pp modulation method is formed. A DDT area and a secure track are provided at the beginning (inner circumference side) of an area where data is modulated and recorded by the 1-7pp modulation method.
Also in this case, the DDT area is an area for performing a replacement sector process on a physically defective sector (recording block). The UID described above is recorded in the DDT area. Further, in this case, information for protecting the content is stored in the secure track.
A FAT area is provided in an area where data is modulated and recorded by 1-7pp modulation. The FAT area is an area for managing data in the FAT system. The FAT system performs data management conforming to the FAT system used in general-purpose personal computers.

In the second next-generation MD disc, no U-TOC area is provided as can be seen from the figure. That is, the second next-generation MD disc is assumed to be used only by a player compliant with the next-generation MD.
In a player compliant with the next-generation MD, when a second next-generation MD disc is loaded, the DDT, secure track, and FAT area at a predetermined position are read, and data management is performed using the FAT system. It will be.

In order to cope with the next generation disc as described above, the recording / reproducing apparatus 1 of this example shown in FIG. 1 includes a storage unit configured as shown in FIG. Recording / playback is assumed.
In FIG. 4, in the storage unit 2, the loaded disk 40 is rotationally driven by the spindle motor 29 by the CLV method. The disc 40 is irradiated with laser light from the optical head 19 during recording / reproduction.
In this case, as the disk 40, there is a possibility that the current MD specification disk, the first next generation MD specification disk, and the second next generation MD specification disk may be mounted. Therefore, the linear velocity differs depending on these discs.
For this reason, the spindle motor 29 is rotated in accordance with different linear velocities corresponding to the loaded disks 40.

  The optical head 19 performs a high level laser output for heating the recording track to the Curie temperature during recording, and a relatively low level laser output for detecting data from reflected light by the magnetic Kerr effect during reproduction. . For this reason, although not shown, the optical head 19 is equipped with a laser diode as laser output means, an optical system including a polarizing beam splitter, an objective lens, and the like, and a detector for detecting reflected light. The objective lens provided in the optical head 19 is held so as to be displaceable in the radial direction of the disk and in the direction of contacting and separating from the disk, for example, by a biaxial mechanism.

A magnetic head 18 is disposed at a position facing the optical head 19 with the disk 40 interposed therebetween. The magnetic head 18 performs an operation of applying a magnetic field modulated by the recording data to the disk 40.
Although not shown, a sled motor and a sled mechanism are provided to move the entire optical head 19 and the magnetic head 18 in the radial direction of the disk.

  In the case of the second next-generation MD disk, the optical head 19 and the magnetic head 18 can form minute marks by performing pulse drive magnetic field modulation. In the case of the current MD disc or the first next-generation MD disc, the magnetic field modulation method is used.

  In addition to the recording / reproducing head system using the optical head 19 and the magnetic head 18 and the disk rotation driving system using the spindle motor 29, the storage unit 2 includes a recording processing system, a reproducing processing system, a servo system, and the like.

In the recording processing system, in the case of the disc of the current MD system, at the time of recording an audio track, error correction coding is performed by ACIRC, data is recorded by being modulated by EFM, and the first and second next generations. In the case of MD, there is provided a portion for performing error correction coding by a system combining BIS and LDC, and modulating and recording by 1-7pp modulation.
The playback processing system uses EFM demodulation and error correction processing by ACIRC during playback of the current MD system disc, and partial response and Viterbi decoding during playback of the first and second next generation MD system discs. A portion for performing 1-7pp demodulation based on data detection and error correction processing by BIS and LDC is provided.
Further, a part for decoding an address based on an ADIP signal of the current MD system or the first next generation MD and a part for decoding an ADIP signal of the second next generation MD are provided.

Information detected as reflected light by laser irradiation of the optical head 19 on the disk 40 (photocurrent obtained by detecting the laser reflected light with a photodetector) is supplied to the RF amplifier 21.
The RF amplifier 21 performs current-voltage conversion, amplification, matrix calculation, and the like on the input detection information, and reproduces a reproduction RF signal, a tracking error signal TE, a focus error signal FE, and groove information (track on the disk 40) as reproduction information. ADIP information recorded by wobbling) is extracted.

When reproducing the disc of the current MD system, the reproduced RF signal obtained by the RF amplifier is processed by the EFM demodulator 24 and the ACIRC decoder 25.
That is, the reproduced RF signal is binarized by the EFM demodulator 24 to be converted into an EFM signal sequence, EFM demodulated, and further subjected to error correction and deinterleave processing by the ACIRC decoder 25. That is, at this time, the ATRAC compressed data state is entered.
At the time of reproducing the disk of the current MD system, the selector 26 is selected on the B contact side, and the demodulated ATRAC compressed data is output as reproduced data from the disk 40.

On the other hand, when reproducing the first and second next-generation MD discs, the reproduction RF signal obtained by the RF amplifier 21 is processed by the RLL (1-7) PP demodulator 22 and the RS-LDC decoder 25. . That is, the reproduced RF signal is detected by the RLL (1-7) PP demodulator 22 by means of data detection using PR (1, 2, 1) ML or PR (1, -1) ML and Viterbi decoding. ) Reproduced data as a code string is obtained, and RLL (1-7) demodulation processing is performed on this RLL (1-7) code string. Further, the RS-LDC decoder 23 performs error correction and deinterleave processing.
When the first and second next-generation MD discs are reproduced, the selector 26 is selected on the A contact side, and the demodulated data is output as reproduced data from the disc 40.

The tracking error signal and focus error signal output from the RF amplifier 21 are supplied to the servo circuit 27, and the groove information is supplied to the ADIP demodulator 30.
The ADIP demodulator 30 performs band limitation on the groove information by a bandpass filter to extract a wobble component, and then performs FM demodulation and biphase demodulation to demodulate the ADIP signal.
The thus-demodulated ADIP address, which is absolute address information on the disk, is supplied to the system controller 8 shown in FIG. The system controller 8 executes necessary control processing based on the ADIP address.
The groove information is supplied to the servo circuit 27 for spindle servo control.

The servo circuit 27 generates a spindle error signal for CLV servo control, for example, based on an error signal obtained by integrating the phase error with the reproduction clock (PLL clock at the time of decoding) with respect to the groove information.
Further, the servo circuit 27 performs various servo control signals (tracking control signals) based on a spindle error signal, a tracking error signal supplied from the RF amplifier 21, a focus error signal, a track jump command, an access command, or the like from the system controller 8. , A focus control signal, a thread control signal, a spindle control signal, etc.) are generated and output to the motor driver 28. That is, various servo control signals are generated by performing necessary processing such as phase compensation processing, gain processing, and target value setting processing on the servo error signal and command.

The motor driver 28 generates a required servo drive signal based on the servo control signal supplied from the servo circuit 27. The servo drive signal here includes a biaxial drive signal for driving the biaxial mechanism (two types of focus direction and tracking direction), a sled motor drive signal for driving the sled mechanism, and a spindle motor drive signal for driving the spindle motor 29. It becomes.
With such a servo drive signal, focus control and tracking control for the disk 40 and CLV control for the spindle motor 29 are performed.

When recording audio data on the disc of the current MD system, the selector 16 is connected to the B contact, so that the ACIRC encoder 14 and the EFM modulator 15 function.
In this case, the compressed data supplied from the cache memory 3 shown in FIG. 1 as recording data is subjected to interleaving and error correction code addition by the ACIRC encoder 14 and then EFM modulation by the EFM modulation unit 15.
The EFM modulation data is supplied to the magnetic head driver 17 via the selector 16, and the magnetic head 18 applies a magnetic field to the disk 40 based on the EFM modulation data, thereby recording an audio track.

On the other hand, when data is recorded on the first next generation MD or the second next generation MD2 disc, the selector 16 is connected to the A contact, and the RS-LDC encoder 12 and the RLL (1-7) PP modulation unit 13 are connected. Will work. In this case, high-density data from the cache memory 3 is subjected to interleaving and RS-LDC error correction code addition by the RS-LDC encoder 12, and then RLL (1-7) PP modulation unit 13 performs RLL (1 -7) Modulation is performed.
Then, the recording data as the RLL (1-7) code string is supplied to the magnetic head driver 17 via the selector 16, and the magnetic head 18 applies a magnetic field based on the modulation data to the disk 40, thereby data tracks. Is recorded.

The laser driver / APC 20 causes the laser diode to perform a laser emission operation during reproduction and recording as described above, but also performs a so-called APC (Automatic Laser Power Control) operation.
That is, although not shown, a detector for laser power monitoring is provided in the optical head 19, and the monitor signal is fed back to the laser driver / APC 20. The laser driver / APC 20 compares the current laser power obtained as the monitor signal with the set laser power and reflects the error in the laser drive signal, so that the laser power output from the laser diode is , It is controlled to stabilize at the set value.
As the laser power, values as reproduction laser power and recording laser power are set by the system controller 8 in a register in the laser driver / APC 20.

  Each of the above operations (access, various servo, data write, and data read operations) is executed based on an instruction from the system controller 8 shown in FIG.

Returning to FIG. 1, the overall configuration of the recording / reproducing apparatus 1 of this example will be described.
In FIG. 1, a cache memory 3 is a cache memory that buffers data recorded on the disk 40 by the storage unit 2 having the above configuration or data read from the disk 40 by the storage unit 2, for example, D- It consists of RAM.
Writing / reading data to / from the cache memory 3 is controlled by a task activated in the system controller (CPU) 8.

  The USB interface 4 performs processing for data transmission when connected to the personal computer 50 through a transmission path 51 as a USB cable, for example.

The input / output processing unit 5 performs processing for input / output of recording / playback data, for example, when the recording / playback apparatus 1 functions alone as an audio device.
The input / output processing unit 5 includes, for example, an analog audio signal input unit such as a line input circuit / microphone input circuit, an A / D converter, and a digital audio data input unit as an input system. It also includes an ATRAC compression encoder / decoder. The ATRAC compression encoder / decoder is a circuit for executing compression / decompression processing of audio data by the ATRAC system. Of course, the recording / reproducing apparatus of the present embodiment may adopt a configuration capable of recording / reproducing audio data in another format such as MP3. In this case, the format of these audio data It is possible to change the configuration appropriately, such as providing an encoder / decoder corresponding to the above.
In this embodiment, video data is not limited to a format that can be recorded / reproduced. For example, MPEG4 can be considered. The input / output processing unit 5 may be provided with an encoder / decoder corresponding to such a format.
Further, the input / output processing unit 5 includes an analog audio signal output unit such as a digital audio data output unit and a D / A converter and a line output circuit / headphone output circuit as an output system.

  In this case, the input / output processing unit 5 includes an encryption processing unit (not shown). In the encryption processing unit, for example, the AV data to be recorded on the disk is encrypted by a predetermined algorithm. For example, when the AV data read from the disk is encrypted, a decryption process for decryption is executed as necessary.

  Audio data is recorded on the disc as processing via the input / output processing unit 5 when, for example, digital audio data (or an analog audio signal) is input to the input / output processing unit 5 as an input TIN. Input linear PCM digital audio data or linear PCM audio data obtained by analog audio signal input and converted by an A / D converter is ATRAC compression encoded as necessary and stored in the cache memory 3. . Then, the data is read from the cache memory 3 and transferred to the storage unit 2 at a predetermined timing (data unit corresponding to an ADIP cluster). In the storage unit 2, the transferred compressed data is modulated by a predetermined modulation method and recorded on the disk.

  When mini-disc audio data is reproduced from the disc, the storage unit 2 demodulates the reproduced data into the ATRAC compressed data state and transfers the data to the cache memory 3. Then, it is read from the cache memory 3 and transferred to the input / output processing unit 5. The input / output processing unit 5 performs ATRAC compression decoding on the supplied compressed audio data to obtain linear PCM audio data, which is output from the digital audio data output unit. Alternatively, line output / headphone output is performed as an analog audio signal by a D / A converter.

The system controller 8 performs overall control in the recording / reproducing apparatus 1 and communication control with the connected personal computer 50.
The ROM 8a shown in the figure stores an operation program for the system controller 8, fixed parameters, and the like.
The RAM 8b is used as a work area by the system controller 8 and is a storage area for various necessary information.
For example, various management information and special information read from the disk 40 by the storage unit 2, for example, the management information of the music track such as the above-described P-TOC data, U-TOC data, FAT data, etc. are taken into the cache memory 3. However, the system controller 8 takes necessary information out of the management information into the RAM 8b for processing.
The cache management memory 9 is composed of, for example, an S-RAM, and stores information for managing the state of the cache memory 3. The system controller 8 controls data cache processing while referring to the cache management memory 9.

The display unit 6 displays various information to be presented to the user based on the control of the system controller 8. For example, character data such as operation state, mode state, name of music, track number, time information, and other information are displayed.
For example, when the disk 40 is a next-generation disk, it is assumed that image data is stored in association with music data for the disk 40, but the display unit 6 loads the disk 40. It is also conceivable to display the image data correlated in this way based on the control of the system controller 8 at the time of reproduction or reproduction.

  Various operation buttons, a jog dial, and the like are formed in the operation unit 7 as various operators for user operations. The user gives a required operation instruction to the recording / reproducing apparatus 1 by operating the operation unit 7. The system controller 8 performs a predetermined control process based on the operation information input by the operation unit 7.

Note that the configuration of the recording / reproducing apparatus 1 described so far is merely an example. For example, the input / output processing unit 5 may include not only audio data but also an input / output processing system corresponding to video data.
Further, the connection with the personal computer 50 is not USB, but another external interface such as IEEE 1394 may be used.
Further, as the operation unit 7, it is possible to provide an operation element similar to that illustrated above on the remote controller.

2. System controller functions

In the recording / reproducing apparatus 1 of the present example, a required operation is executed under the control of the system controller 8 in the configuration described with reference to FIGS. For this purpose, the system controller 8 is configured with software functional blocks for executing various tasks shown in FIG.

In FIG. 5, the system mode task is a function for managing the operation mode of the recording / reproducing apparatus 1.
The cache management task is a function for performing write / read operation control of the cache memory 3, write / read address setting, storage status management, and the like.
The disk access task is a function for controlling various operations on the storage unit 2, that is, operations such as data writing to the disk 40, data reading, activation, stop, access, servo, and data transfer to and from the cache memory 3. is there.
The audio input / output task is a function that controls operations of the input / output processing unit 5, that is, operations such as encoding / encryption of input data, decoding / decoding of output data, and data transfer to / from the cache memory 3.
The USB task is a function for executing various communications with a personal computer or a network or controlling data transfer via the USB interface 4.
The power management task is a function for performing power management of the recording / reproducing apparatus.
The user interface task is a function for detecting user operation input by the operation unit 7 and controlling display of the display unit 6.
The sort task is a function for executing character data sort processing.
For example, by executing the functions of various tasks as described above, a recording / reproducing operation, a display operation, a communication operation, and the like are executed.

Further, when the disk 40 is loaded, the system controller 8 first performs a process called system read. The system read is an operation for reading the management information of the disk 40, that is, FAT, TIF (track information file) described later, and a TOC in a disk where a TOC exists.
The system controller 8 instructs the storage unit 2 to read FAT and TIF. The FAT and TIF read in the storage unit 2 are stored in the cache memory 3.
In the cache memory 3, an area for holding the FAT and TIF is secured in addition to a data cache area used for buffering audio data and the like. The FAT and TIF read from the disk 40 are stored in the FAT area and TIF area of the cache memory 3, respectively. Further, the system controller 8 may perform necessary processing by expanding FAT and TIF information in the RAM 8b.
Each task in the system controller 8 performs processing assigned to each function while referring to the FAT and TIF information developed in the cache memory 3 and the RAM 8b as necessary.

3. Disk management structure

Next, a management method for recording and reproducing audio data on the first and second next-generation MD discs will be described.
In the first and second next-generation MD systems, music data with high sound quality can be played back over a long period of time, so the number of music pieces managed on one disc is enormous. Moreover, the compatibility with a computer is achieved by managing using a FAT system. This has the merit that the usability can be improved, but the music data is illegally copied and the copyright holder may not be protected. In the management system to which the present invention is applied, such points are taken into consideration.

Examples of audio data management methods will be described with reference to FIGS.
As shown in FIG. 6A, in the management method of this example, a track information file (TIF) and an audio data file are generated on the disc. The track information file and the audio data file are files managed by the FAT system.
The audio data file is a file in which a plurality of music data is stored as one file. When the audio data file is viewed with the FAT system, it looks like a huge file. The audio data file is partitioned as parts, and the audio data is handled as a set of parts.
For example, there is an example in which one piece of music is set as one audio data file and a plurality of audio data files are managed by the FAT system.

The track information file (TIF) is a file in which various information for managing music data stored in an audio data file is described.
As shown in FIG. 6B, the track information file includes a play order table, a programmed play order table, a group information table, a track information table, a parts information table, and a name table.

The play order table is a table indicating the playback order defined by default. As shown in FIG. 7A, the play order table stores information TINF1, TINF2,... Indicating link destinations to track descriptors (FIG. 9) of the track information table for each track number (song number). Has been. The track number is a continuous number starting from “1”, for example.
The programmed play order table is a table in which each user defines a playback procedure. In the programmed play order table, as shown in FIG. 7B, information track information PINF1, PINF2,... Linked to the track descriptor for each track number is described.

In the group information table, information about groups is described. A group is a set of one or more tracks having a continuous track number, or a set of one or more tracks having a continuous programmed track number. For example, group management is used when you want to divide a large amount of music on a disc into albums.
As shown in FIG. 8A, the group information table describes group descriptors (GPD0 to GPDn) of each group. In the group descriptor GPD, as shown in FIG. 8B, the track number at which the group starts, the number of the end track, the group name, and the flag are described.

  In the track information table, information about each track (each song) is described. As shown in FIG. 9A, the track information table is made up of track descriptors (TKD0 to TKDn) for each track (each song). As shown in FIG. 9B, each track descriptor TKP includes an encoding method, copyright management information, content decryption key information, pointer information to a part number that is an entry at which the music starts, an artist name, Title name, original song order information, recording time information, etc. are described. The artist name and title name describe pointer information to the name table, not the name itself. The encoding method indicates a codec method and becomes decoding information.

In the part information table, a pointer for accessing the actual music position from the part number is described. Parts are all parts of one track (music) or each part obtained by dividing one track.
As shown in FIG. 10A, the part information table includes part descriptors (PTD0 to PTDn) for each part. The entry of the part descriptor PTD is indicated by the track information table (FIG. 9A). As shown in FIG. 10B, each part descriptor PTD describes the start address of the part in the audio data file, the end address of the part, and the link destination to the part that follows the part. The

  The address used as part number pointer information, name table pointer information, and pointer information indicating the position of the audio file is a file byte offset, FAT cluster number, physical address of a disk used as a recording medium, or the like. be able to.

The name table is a table for representing characters that are names of names. As shown in FIG. 11A, the name table includes a plurality of name slots (NS0 to NSn). Each name slot NS is called by being linked from each pointer indicating a name. The pointer for calling the name includes an artist name, a track name, an album name, a group name in the group information table, etc. in the track information table. Each name slot NS can be called from a plurality.
As shown in FIG. 11B, each name slot NS includes name data that is character information, a name type that is an attribute of the character information, and a link destination. A long name that does not fit in one name slot can be described by being divided into a plurality of name slots. If one name slot does not fit, the link destination to the name slot in which the subsequent name is described is described.

  In the audio data management method of this example, necessary information is read from the play order table in the track information file (TIF). That is, as shown in FIG. 12, when the track number to be reproduced is designated by the play order table, the track descriptor TDPx (see FIG. 9) to which the track information table is linked is read out, and the code is read from the track descriptor TDPx. , The copyright management information, the content decryption key information, the pointer information to the part number where the music starts, the artist name and title name pointer, the original music order information, the recording time information, etc. are read out.

The part number information read from the track information table is linked to a part descriptor PTDx in the part information table (see FIG. 10). Then, the audio data file of the part position corresponding to the start position of the track (music piece) is accessed from the part descriptor PTDx linked in the part information table.
When the data of the part at the position specified in the part information table of the audio data file is accessed, the reproduction of the audio data is started from that position. At this time, decoding is performed based on the encoding method read from the track descriptor TKDx of the track information table. When the audio data is encrypted, the key information read from the track descriptor TKDx is used.

When there is a part that follows the part, the link destination of the part is described in the part descriptor PTDx, and the part descriptors are sequentially read according to the link destination. FIG. 12 shows a state in which the part descriptors PTDy are linked.
In this way, by tracing the link destination of the part descriptor PTD and reproducing the audio data of the part at the position specified by the part descriptor on the audio data file, the desired track (music piece) can be reproduced. Audio data can be played.

Further, the name slot NSx of the name table (see FIG. 11) at the position indicated by the pointer of the artist name or title name read from the track descriptor TKDx of the track information table is called, and the name slot NSx Data is read out.
In the example of FIG. 12, the name slot NSx is linked to the name slot NSx, and character data as an artist name or the like is read from these two name slots.

As described above, a plurality of name slots NS in the name table can be referred to. For example, there may be a case where a plurality of music pieces of the same artist are recorded. In this case, as shown in FIG. 13, the same name table is referred to as the artist name from a plurality of track descriptors TKD. In the example of FIG. 13, the track descriptors TKD1, TKD2, and TKD4 are music pieces of the same artist “DEF BAND” and refer to the same name slot NSw as the artist name.
The track descriptors TKD3, TKD5, and TKD6 are music pieces of the same artist “GHQ GIRLS” and refer to the same name slot NSz as the artist name. Thus, if the name slot of the name table can be referred to from a plurality of pointers, the capacity of the name table can be saved.

  Along with this, for example, a link to this name table can be used to display information of the same artist name. For example, when it is desired to display a list of music pieces whose artist name is “DEF BAND”, the track descriptor referring to the address of the name slot NSw of “DEF BAND” is traced. In this example, the track descriptors TKD1, TKD2, and TKD4 are obtained by tracing the track descriptor referring to the address of the name slot of “DEF BAND”. This makes it possible to display a list of songs whose artist name is “DEF BAND” among the songs stored on the disc. Since a plurality of name tables can be referred to, no link is provided to reversely follow the track information table from the name table.

Here, as understood from the above description, in this example, the audio data to be recorded / reproduced by the recording / reproducing apparatus 1 alone takes the management form based on the unique management information as the TIF. .
In this example, the audio data to be recorded / reproduced is managed based on the unique management information because the recording / reproducing apparatus 1 can perform an efficient operation as an audio recording / reproducing system. This is to realize such a management form.
For example, according to the TIF as described above, it is possible to efficiently perform play order management and track search from a track name or the like. In addition, as described above, since the link destination is designated for each audio data part and accessed, so-called “divide” and “combine” editing performed in the conventional MD system is also efficient. As an audio recording / reproducing system, efficient data management can be performed.

  On the other hand, since the recording / reproducing apparatus 1 of this example is connected to a personal computer or the like and operates as a general-purpose storage device, data management on the disk 40 is performed as described above. Management according to the FAT system is performed.

Here, for confirmation, the data management structure of this example in which the management is performed by the FAT system and the TIF in this way is schematically shown in FIG.
FIG. 14 schematically shows a management structure for data stored in the disk 40 to be a next generation MD.
As shown in the figure, in this case, the data on the disk 40 is managed by the FAT system. As described above, the audio data recorded / reproduced alone by the recording / reproducing apparatus 1 is managed by the TIF in which the directory is specified (that is, managed) by such a FAT system. Done.
That is, as is apparent from this figure, on the disk 40 in this example, data managed only by FAT (data that cannot be recorded / reproduced by the recording / reproducing apparatus 1 alone) and TIF managed by FAT. Data to be present. According to this, the audio data that can be recorded and reproduced by the recording / reproducing apparatus 1 alone is managed by both the FAT and the TIF.

4). Operation of the recording / playback device

In this example, after adopting the configuration described so far as the recording / reproducing apparatus 1, the format process is performed on the loaded disc 40 by the operation of the recording / reproducing apparatus 1 alone.
Further, in the recording / reproducing apparatus 1, such a format process is performed when the management information cannot be read due to, for example, a physical error occurring in the loaded disk 40, or when the recording / reproducing apparatus 1 of the present example supports. The audio data stored in the disc 40 is executed when it is impossible to reproduce the audio data, such as when the format is not to be used.

  Here, as described above, in this example, data is managed on the disk 40 by two different management forms on the disk 40 by two different management information based on FAT and TIF. In such a management form, the audio data cannot be reproduced from the disk 40 as described above. The FAT cannot be read and the audio data stored in the disk 40 cannot be reproduced. There are two patterns that can occur when only audio data cannot be read and audio data cannot be reproduced.

Of these patterns, for example, as described above, it is assumed that the format processing as described above is executed according to the case where the TIF cannot be read and the audio data cannot be reproduced. In this case, data that cannot be read out is data necessary only for reproduction of audio data as TIF, and data managed by FAT other than audio data is connected to the recording / reproducing apparatus 1. A case where reproduction on the personal computer 50 side is possible is conceivable.
In other words, if the above-described formatting process is performed for such a state, data managed only by FAT can be reproduced on the personal computer 50 side, but even this data is erased. The problem of being done will arise.

  In particular, in this case, since the recording / reproducing apparatus 1 is assumed to be used as a general-purpose storage device and is managed by FAT, for example, when connected to the personal computer 50, the user uses the disk 40 on the personal computer 50 side. Since it is not impossible to edit the TIF stored above, for example, the user may erroneously erase a part of the TIF. Also from such a situation, an error may occur only in the TIF as described above.

Further, as described above, in the case where the format process is executed in accordance with the case where the reproduction of the audio data from the disk 40 is impossible, for example, as in the recording / reproducing apparatus 1 of this example, the optical disk having the optical head is provided. In an apparatus for recording / reproducing a medium, a phenomenon that a disk that cannot be read by a certain apparatus can be read by another apparatus due to optical factors such as reading accuracy of the head.
Considering this, for example, if the format processing as described above is automatically executed in response to the detection of a portion that cannot be played back from the disc, other recording / playback apparatuses will not be able to There is a possibility that data may be erased even on a readable disc.
In other words, if the above-described formatting process is executed in response to the detection of a portion that cannot be read from the disc, there is a possibility that even data that can be reproduced by other devices may be erased as described above.

In view of these problems, in this example, in the case where the TIF cannot be read and the audio data cannot be reproduced as described above, the format process for only the area managed by the TIF is performed. Shall be executed.
That is, the content of the TIF is updated to the information content for setting an initial state in which no audio track is stored on the disk 40, thereby eliminating the state where recording / reproduction of audio data is impossible. .
In the following, the operation for updating the contents of the TIF to the initial state in this way is referred to as “create file processing” for convenience.
On the other hand, depending on the state where reproduction of all data stored in the disk 40 is impossible, such as when the FAT cannot be read as described above, or when the recording / reproducing apparatus 1 has a format that is not compatible. The format process (initialization process) performed on the entire disk 40 is referred to as “physical format process”.

In this example, when the data necessary for reproducing the audio data from the disc 40 cannot be read together with the above-described operation, for example, by the user interface using the operation unit 7 and the display unit 6 shown in FIG. It is assumed that the user selects whether to execute physical format processing or create file processing.
For example, whether the physical format process or the create file process is executed on the display unit 6 when it is detected as a result of the system read process that data necessary for reproducing the audio data from the disk 40 cannot be read. Displays a screen for selecting whether or not. Then, physical format processing or create file processing is executed in response to a user operation on the operation unit 7 according to the screen content displayed in this way.
In this way, whether or not to perform physical format processing or create file processing can be left to the user's selection. That is, for example, the user can temporarily cancel the execution of the physical format process or the create file process for a disk that has caused a read error, and read the disk again by another apparatus. Thus, it is possible to effectively prevent a situation in which data stored in a disk readable by another apparatus is automatically erased.

5). Processing action

FIG. 15 is a flowchart showing processing operations to be executed by the system controller 8 shown in FIG. 1 in realizing the operation of the present example.
The processing operation shown in this figure is executed by the system controller 8 based on a predetermined program stored in the ROM 8a shown in FIG. 1, for example. For the sake of convenience, this figure shows only the operation when the recording / reproducing apparatus 1 is loaded with a next-generation MD disc 40 that is managed by FAT and TIF.
First, in step S101 shown in the figure, a system read process for the loaded disc 40 is executed. When the FAT or TIF is read from the loaded disk 40 by such a system read process, it is determined in step S102 whether or not an error has been detected for these FAT and TIF. That is, it is determined whether or not the data stored in the loaded disc 40 is reproducible data.
If a negative result is obtained in this step S102 that there is no error, the routine proceeds to normal reproduction processing as shown in the figure. If a positive result is obtained that there is an error, the process proceeds to step S103.

In step S103, it is determined whether the error detected in step S102 is a format error or an audio file error.
In this step S103, the error content detected in the above step S102 is, for example, a physical format that cannot be read out of the FAT, or is not supported by the recording / reproducing apparatus 1, or shown in FIGS. If the data stored in the disk 40 is in a state where it cannot be recognized, for example, it is impossible to read out the DDT that is the replacement area, the format error is determined.
Also, for example, if the contents of the FAT can be recognized but the TIF cannot be read, such as when the data necessary for reproduction of the audio data file cannot be read, the audio file error is determined. To do.
As described above, the audio file error mentioned here widely refers to an error that makes it impossible to read data necessary for reproduction of only the audio data file. For example, the contents of the TIF can be read. However, even if the audio data file indicated by the TIF does not exist, such an audio file error (second management information error) is included.

If it is determined in step S103 that the error detected in step S102 is the format error, the process proceeds to step S104.
In step S104, a format error is displayed. That is, by controlling the display unit 6 shown in FIG. 1, first, for example, character information for notifying the user of a format error is displayed over a predetermined time length.
In the subsequent step S105, a selection screen for allowing the user to select whether or not to execute the formatting process is displayed.
For example, as such a selection screen, the name of each operation button to be operated in order to instruct each of execution or cancellation of formatting, together with character information such as “Do you want to format?” And “Format?” It should be displayed.
Thus, the user can instruct the recording / playback apparatus 1 to execute / cancel the format by operating one of the displayed operation buttons with two names.

In step S106, it is determined whether or not the operation performed on the selection screen is for executing formatting (YES) or canceling (NO).
If it is determined in step S106 that the operation performed on the selection screen is for canceling, the process proceeds to step S116 to execute a cancel display process. That is, the display unit 6 is notified of “cancel” being selected by displaying “CANCEL” or the like. If such a cancel display is performed for a predetermined time, an error disk display is performed in the subsequent step S117. In other words, in this case, since the cancel is selected, the physical formatting process is not performed on the disk 40, and the disk 40 remains in the error disk state. For example, character information for notifying that the disk is an error disk is displayed. This is displayed on the part 6.
When error disk display is performed in this way, sleep processing is executed in step S118. That is, after the predetermined time has elapsed when the display indicating the state of the disk 40 is performed as described above, the process for setting the recording / reproducing apparatus 1 to the standby state is executed.
When cancel is selected in this way and error disk display is performed, a process of ejecting the disk 40 may be executed.

If it is determined in step S106 that the operation performed on the selection screen is for formatting, in step S107, it is confirmed whether or not the formatting process is to be performed again. Display the confirmation screen.
For example, such a confirmation screen displays character information such as “Do you really want to format?” And, like the previous selection screen, the names of the operation buttons for instructing execution or cancellation of formatting. May be displayed.
In this way, by allowing the selection as to whether or not to execute the formatting process to be performed again, it is possible to more reliably prevent an erroneous operation regarding the decision to execute / cancel the formatting process.

In the subsequent step S108, it is determined whether or not the operation performed on the confirmation screen is for executing formatting (YES) or for canceling (NO). . If the operation performed on the confirmation screen is for canceling, the cancel display, error disk display, and sleep processes by the processes in steps S116 to S118 described above are performed. Executed.
If it is determined in step S108 that the operation performed on the confirmation screen is for executing formatting, the process proceeds to step S109 to perform physical formatting. That is, the contents of FAT and TIF are initialized as physical format processing.

When the physical formatting process is executed in this way, a blank disk display process is performed in step S110. That is, character information or the like for notifying that the disc is a blank disc is displayed on the display unit 6, thereby notifying the user that the disc 40 is in a recordable / reproducible state.
When the blank disk display process is executed in this way, the process proceeds to the sleep process of the previous step S118. In this case as well, the recording / reproducing apparatus 1 after the lapse of a predetermined time after the above-described disk status display is performed. Will be executed to set to the standby state.
For the sake of confirmation, the predetermined time until the sleep after the blank disk display is set in this way is set as the time for accepting an operation such as data recording for the disk 40 that has become the blank disk. Has been.

Subsequently, in step S103, if the error content detected in step S102 is an audio file error, the process proceeds to step S111.
In step S111, an audio file error display is performed. That is, the character information for notifying the user that the audio file error has occurred is displayed on the display unit 6.
In the subsequent step S112, a selection screen for allowing the user to select whether or not to execute the create file process is displayed.
In this case, too, for example, character information such as “Do you want to be able to record?” Or “CREATE FILE?” Is displayed as a selection screen, and in addition to this, an operation for instructing execution or cancellation of create file processing is performed. The names of the operation buttons to be displayed may be displayed.

In step S113, it is determined whether or not the operation performed on the selection screen is for executing create file processing (YES) or for canceling (NO). Do. If the operation performed on the selection screen is for canceling, as in the case of the previous step S106, the cancel display, error disk display, and sleep by the processing of steps S116 to S118 are performed. Processing is executed.
If it is determined in step S113 that the operation performed on the selection screen is for executing create file processing, create file processing is executed in step S114. That is, in this case, the format process is executed only for the area managed by the TIF.
In this example, the execution screen / cancellation of the create file process is not performed as described above, but it is of course possible to perform this.

When the create file process is executed in step S114, a blank disk display process is performed in the subsequent step S115. That is, this notifies the user that the disc 40 is in a recordable / reproducible state, as in the previous step S110.
When the blank disk display process is executed in this way, the process proceeds to the sleep process of the previous step S118 in this case as well, whereby the process for setting the recording / reproducing apparatus 1 to the standby state after a predetermined time has elapsed. The

  In the processing operation shown in FIG. 15, as formatting processing (physical formatting processing and create file processing) for the disk 40, if this is immediately performed according to the selection of the execution, the disk 40 is transferred to. During the writing of necessary information, the user cannot give an operation instruction to the recording / reproducing apparatus 1 for a relatively long time. Therefore, as such a format process, first, necessary information is created in the cache memory 3 or the RAM 8b shown in FIG. Based on the information, it may be possible to execute the immediate processing (deemed format). In this case, the actual formatting process may be executed at a later required timing.

As described above, in the recording / reproducing apparatus 1 of the present embodiment, when the disc 40 storing the data managed only by the FAT and the audio data managed by the TIF managed by the FAT is loaded. When the audio data cannot be recorded / reproduced due to the error of only the TIF, the format process only for the area managed by the TIF is executed.
In this way, when recording / playback of audio data is impossible due to an error of only TIF, if the format process for only TIF is executed, other data managed by the FAT is stored in, for example, a personal computer. When playback is possible on the 50 side, it is possible to effectively prevent such a situation that even the playable data is erased by the formatting process.

In the present embodiment, when it is detected that the loaded disk 40 is an error disk, whether or not to execute physical format processing and create file processing can be selected based on an operation input. It is said.
In this way, it becomes possible to select whether or not to execute physical format processing and create file processing. For example, when formatting is automatically performed in response to detection of an error disk, As described above, it is possible to prevent a situation in which the data stored in the disk 40 is erased even though the data can be read out by another recording / reproducing apparatus 1.
That is, in this case, the user does not format immediately, so that the user can get an opportunity to try the disk 40 loaded in another drive.

Further, as can be understood from the above description, in the recording / reproducing apparatus 1 of the present embodiment, when the loaded disc 40 is detected to be an error disc, it is automatically guided to the format. Therefore, it is possible to reduce the operation burden when the user manually selects and executes the format processing item.
Further, as understood from FIG. 15, the operation as the recording / reproducing apparatus 1 of this example is provided with a display means capable of displaying at least two operation buttons and character information as a user interface. This is feasible. That is, such an operation according to this example is also suitable for a device having a limited hardware resource such as a portable device.

In the embodiment, the second management information on the disk 40 is the TIF, and the data managed by the second management information is audio data. However, for example, the second management information The data managed by this may be other data such as video data, and the second management information at this time is unique management information suitable for recording / reproduction of stored data. Just do it.
For example, in the case of the TIF of this example, management in units of tracks, management of track names, copyright information, encryption information, etc. are performed. There are managements for each program, name management for each program, and similar management for copyright information, encryption information, and the like. For example, in the future, it is also conceivable to manage the copyright information and the encryption information as described above together with the additional information for each file in the future.
The present invention can be suitably applied to the case where specific main data is managed by unique management information as the second management information, in view of efficiently managing various types of information.

  Further, in this example, the case where the recording / reproducing apparatus is applied to a configuration corresponding to MD has been described as an example. However, for example, a configuration corresponding to an optical disc medium that does not incorporate an optical head, such as a CD or a DVD (Digital Versatile Disc). In contrast, the present invention can be preferably applied.

It is a block diagram of the recording / reproducing apparatus of embodiment of this invention. It is explanatory drawing of the disk with which the recording / reproducing apparatus of embodiment respond | corresponds. It is explanatory drawing of the disk with which the recording / reproducing apparatus of embodiment respond | corresponds. It is a block diagram of the storage part of the recording / reproducing apparatus of embodiment. It is explanatory drawing of the task of the system controller of embodiment. It is explanatory drawing of the management information form of a disk. It is explanatory drawing of a play order table and a programmed play order table. It is explanatory drawing of a group information table. It is explanatory drawing of a track information table. It is explanatory drawing of a parts information table. It is explanatory drawing of a name table. It is explanatory drawing of the management structure from a play order table. It is explanatory drawing of a track information table and a name table. It is the figure which showed typically about the management form of the data memorize | stored on the disk with which the recording / reproducing apparatus of embodiment corresponds. It is a flowchart shown about the processing operation of the recording / reproducing apparatus of embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Recording / reproducing apparatus, 2 Storage part, 3 Cache memory, 4 USB interface, 5 Input / output processing part, 6 Display part, 7 Operation part, 8 System controller, 8a ROM, 8b RAM, 9 Cache management memory

Claims (4)

Managed by the first management information, the first main data managed by the first management information, the second management information managed by the first management information, and the second management information Recording / reproducing means for recording and reproducing data on a storage medium storing the second main data,
When an error in the first management information is detected in the recording / reproducing means, the recording / reproducing means is controlled so that the storage medium is initialized, and an error only in the second management information is detected. If detected, control means for controlling the recording / reproducing means so that only the second management information is initialized;
A recording / reproducing apparatus comprising: The recording / reproducing means includes an optical head and is configured to perform recording and reproduction on the storage medium that is an optical disk medium.
The control means includes
When the error of only the second management information is detected in the recording / reproducing means, the recording / reproducing means is controlled so that only the second management information is initialized according to the operation input. ,
The recording / reproducing apparatus according to claim 1. Managed by the first management information, the first main data managed by the first management information, the second management information managed by the first management information, and the second management information A recording / reproducing procedure for recording and reproducing data on the storage medium storing the second main data;
When an error of the first management information is detected by the recording / playback procedure, control is performed so that initialization of the storage medium is performed, and an error of only the second management information is detected Is a control procedure for performing control so that only the second management information is initialized,
The recording / reproducing method characterized by performing this. The storage medium is an optical disk medium without a built-in optical head,
The above control procedure is
When an error of only the second management information is detected by the recording / playback procedure, control is performed so that only the second management information is initialized according to an operation input.
The recording / reproducing method according to claim 3.

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