KR101269811B1 - Optical disc device and data backup method - Google Patents

Abstract

The optical device of the present invention includes a recognition unit for recognizing a capacity of user data recorded in a recording area of a recording medium, a first recording area in which the user data is recorded in the recording area according to the recognized user data capacity, and the user. A setting unit for setting a second recording area in which backup data of data is recorded and a recording unit for recording the user data in the first recording area and recording the backup data in the second recording area, thereby providing backup data. Reliable data preservation is possible by recording at appropriate locations and at appropriate times.

Description

Optical device and data backup method {OPTICAL DISC DEVICE AND DATA BACKUP METHOD}

The present invention relates to an optical device and a data backup method, and more particularly, to an optical device and a data backup method capable of reliably backing up user data.

Optical disks are easier to carry than disks, but are vulnerable to external factors such as adhesion and scratches. Because of this, an error is likely to occur during reproduction, so care must be taken in handling.

If a scratch or foreign matter adheres to the surface, replay retry processing is performed, but data may not be replayed through replay retry.

In Japanese Laid-Open Patent Publication No. 2004-303421, data is recorded according to the OTP method, and after completion of recording of user data, it is determined whether the recording completion position is the first floor, and in the case of the first floor, the intermediate area is recorded immediately after the completion position, and the intermediate area. An information recording method is disclosed in which the outer periphery is left unrecorded. However, although there is a function of recording data on the optical disc, it does not include a function of backing up the recorded data.

Therefore, it is difficult to recover the recorded data if it is damaged by foreign matter or wound.

Japanese Laid-Open Patent Publication No. 2004-303421

The present invention is to provide an optical device and a data backup method capable of reliably backing up user data.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise forms disclosed. Other objects, which will be apparent to those skilled in the art, It will be possible.

An optical device according to the present invention for achieving the above object includes a recognition unit for recognizing a capacity of user data recorded in a recording area of a recording medium, wherein the user data is recorded in the recording area according to the recognized user data capacity. A setting unit for setting a first recording area and a second recording area in which backup data of the user data is recorded, and a recording unit for recording the user data in the first recording area and recording the backup data in the second recording area. It may include.

In this case, when the recording area is formed in one recording layer, the setting unit sets the first recording area continuously in a lead-in area, and from the intermediate position of the recording area to the second recording area. Can be set.

The setting unit may form a plurality of the second recording areas within a range allowed by the recording area. Here, the setting unit may set the second recording area continuously to the first recording area.

The setting unit may calculate the settable number of the second recording area, and set the second recording area by the number of selections within the settable number range.

Further, when the recording area is formed in a plurality of recording layers, the setting unit sets the second recording area in a recording layer different from the first recording area, and the same data as the user data in the backup data is in plan view. The second recording area can be set to be recorded at another position.

Further, the recording area is formed in a plurality of recording layers in an OTP (Opposite Track Path) manner, and data recorded at the same position as the user data in the plane view as the same data as the user data in the backup data is called collision data. In this case, the setting unit sets the second recording area in a recording layer different from the first recording area, and the third recording area continues in the lead out area of the recording layer in which the second recording area is set. And the recording unit may record the collision data in the third recording area.

The recording unit may include a storage unit configured to store the collision data when the collision data is generated, and the recording unit may record the collision data stored in the storage unit in the third recording area after recording of the user data and the backup data is completed. .

The setting unit receives the lock selection signal, and when the lock is not selected, sets the first recording area continuously to the lead in area, and sets the second recording area from an intermediate position of the recording area. And when the lock is selected, the second recording area can be set continuously to the first recording area.

On the other hand, the data backup method of the present invention comprises the steps of: a) recognizing the recording area capacity of the recording medium, b) recognizing the capacity of the user data recorded in the recording area, c) according to the recognized user data capacity. Setting a first recording area in which the user data is recorded and a second recording area in which backup data of the user data is recorded in the recording area, d) recording the user data in the first recording area, and And recording the backup data in a second recording area.

In this case, step c) analyzes the received lock selection signal, sets the first recording area continuously to a lead in area when the lock is not selected, and starts from the intermediate position of the recording area. A second recording area is set, and when the lock is selected, the second recording area can be set by the number of times of selection consecutively to the first recording area.

As described above, the optical device and the data backup method of the present invention set the area where the user data and the backup data are recorded in accordance with the capacity of the user data recorded on the optical disk, and the backup data can be stored at an appropriate position and at an appropriate number of times. Can record

As a result, even if the user data is damaged by foreign substances or wounds, the backup data can be referred to, so that reliable data storage is possible.

1 is a block diagram showing the optical device of the present invention.
Fig. 2 is a schematic diagram showing the manner in which the optical device of the present invention sets the second recording area on the optical disc.
Fig. 3 is a schematic diagram showing another manner in which the optical device of the present invention sets the second recording area on the optical disc.
Fig. 4 is a schematic diagram showing another way in which the optical device of the present invention sets the second recording area on the optical disc.
5 is a flowchart illustrating a data backup method of the present invention.

EMBODIMENT OF THE INVENTION Hereinafter, the optical device and data backup method of this invention are demonstrated in detail with reference to drawings.

1 is a block diagram showing the optical device of the present invention.

The optical device shown in FIG. 1 includes a recognizing unit 110 that recognizes a capacity of user data recorded in a recording area of a recording medium, and a first in which the user data is recorded in the recording area according to the recognized user data capacity. A setting unit 130 for setting a recording area and a second recording area in which backup data of the user data is recorded, and recording the user data in the first recording area, and recording the backup data in the second recording area. And a recording unit 150.

The recognition unit 110 recognizes the capacity of the user data that the user intends to record on the recording medium. Since the user data is recorded in the recording area of the recording medium, the recognition unit 110 also calculates the capacity of the recording area for recording normal user data. This makes it possible to record the remaining portion of the user data on the additional recording medium when the capacity of the user data exceeds the capacity of the recording area.

The recording medium is a medium for storing information, and is information recording means such as magnetic tape, magnetic disk, optical disk, etc. which have been subjected to photosensitive coating. In the case of an optical disc, which is a recording medium used in the optical device according to the present invention, an area for storing various kinds of information necessary for using the optical disc is allocated, and other areas are allocated as a recording area for recording user data. In the optical disc, an area for storing various types of information includes a lead in area which is a region constituting a physical sector in front of the recording area, a lead out area which is a physical sector area outside the recording area, and a recording. When there are a plurality of layers, a middle area for distinguishing each recording layer is included. The recognition unit 110 recognizes at least the capacity of the recording area in the optical disc of this structure.

The setting unit 130 sets in the recording area a first recording area which is an area where user data is recorded and a second recording area which is an area where backup data which is a copy of the user data is recorded.

At this time, the setting of the first recording area and the second recording area is made according to the capacity of the user data recognized by the recognition unit 110. If the first recording area and the second recording area are set in the recording area of the recording medium without considering the capacity of the user data, the second recording area cannot be set to the optimal state in accordance with the capacity of the user data. The second recording area can be set at various positions depending on whether or not the recording medium is locked, the structure, etc., but it is difficult to set appropriately without knowing the capacity of the user data.

For example, assuming that 20 Mbytes of user data is recorded on an optical disk having a recording capacity of 100 Mbytes, backup data for the corresponding user data also has a capacity of 20 Mbytes.

At this time, the first recording area is set continuously to the lead-in area of the optical disc. In this case, the 80 Mbyte recording area excluding the first recording area becomes the target of the second recording area. Since the setting unit 130 has a smaller user data capacity than 50 Mbytes, which is half of the total capacity of 100 Mbytes of the optical disc recording area, the setting unit 130 can set the second recording area from the area following the 50 Mbyte capacity in the recording area. Alternatively, the second recording area may be set continuously to the first recording area. Alternatively, a plurality of second recording areas may be set in the entire free space. If the capacity of the user data is 150Mbytes, three optical disks may be provided, 100Mbytes of data may be recorded on the first optical disk, 50Mbytes of data on the second optical disk, 50Mbytes on the second optical disk, and 100Mbytes on the third optical disk. have. Alternatively, 50 Mbytes of user data and 50 Mbytes of backup data can be recorded on the first, second, and third optical discs.

The above setting of the second recording area can be appropriately changed in accordance with the situation, at which time the capacity of the user data is used. In other words, it is considered that the setting policy of the first recording area and the second recording area is determined according to the capacity of the user data.

The recording unit 150 records the user data in the first recording area set by the setting unit, and records the backup data in the second recording area. To this end, the recording unit may include an optical pickup unit that scans an optical signal for generating an unevenness corresponding to data of 1 or 0 on the optical disc. The recording unit 150 may be integrally formed with the setting unit 130. According to this, for example, user data is recorded at the same time as the first recording area is set on the optical disk, and backup data is recorded at the same time as the second recording area is set.

According to the above configuration, at least the second recording area is set by the capacity of the user data, so that the backup data can be reliably recorded in the appropriate area of the optical disc.

Hereinafter, a method of setting the second recording area will be described.

Fig. 2 is a schematic diagram showing the manner in which the optical device of the present invention sets the second recording area on the optical disc.

Here, the setting unit 130 sets the first recording area b in the recording area a continuously from the lead in area, and sets the second recording area b1 from the intermediate position z of the recording area a. That is, on the basis of the intermediate position z of the recording area a, the previous recording area becomes the object of the first recording area in which the user data is recorded, and the latter recording area becomes the object of the second recording area in which the backup data is recorded.

If it is desired to record new user data after setting the first recording area b and recording the user data, the setting unit sets the new first recording area c for the new user data continuously in the first recording area b. In addition, a new second recording area c1 is set subsequent to the second recording area b1 to record the backup data.

According to the above configuration, when there is no abnormality in the user data, the optical device only needs to drive the optical pickup unit within the front region of the intermediate position, thereby improving the data reproduction speed. Only when an abnormality occurs in the user data, the optical pickup unit is moved to the second recording area formed behind the intermediate position to reproduce the contents.

At this time, the recording area may be formed of one recording layer or of a plurality of recording layers. In the former case, the optical disc is formed of one recording layer, and in the latter case, the optical disc is formed of a plurality of recording layers.

When the recording area is formed of a plurality of recording layers, that is, when the optical disc includes a plurality of recording layers, the recording area of one layer is due to the difference between the lead-in area and the lead-out area (usually larger than the lead-in area) as shown in FIG. Intermediate position z is included. The information of the intermediate position may be included in an area of the optical disc except for the recording area.

3 is a schematic diagram showing another manner in which the optical device of the present invention sets the second recording area on the optical disk.

As shown, the setting unit 130 sets the second recording area b1 continuously in the first recording area b. If a new first recording area c is subsequently set in b1, a new second recording area c1 is set in succession to the first recording area c.

According to the above configuration, since backup data is continuously recorded in the user data, when an abnormality occurs in the user data, the optical pickup unit can refer to the backup data located at the shortest distance. However, when a plurality of user data is recorded, in order to use each user data continuously, the optical pickup unit moves each first recording area in which each user data is recorded through a second recording area located between the first recording areas. shall.

On the other hand, the setting unit 130 may form a plurality of second recording areas within a range allowed by the recording areas. For example, as shown in FIG. 2, a plurality of second recording areas for the first recording area b may be formed, such as b1 and b2. In FIG. 2, since the area targeted for the second recording area does not have a capacity for the second recording area b3, two second recording areas are formed such as b1 and b2. In this case, the number of the second recording areas that can be formed may be calculated by the setting unit 130 based on the capacity of the user data recognized by the recognition unit 110. The number of the second recording areas thus set may be displayed to the user as the number of backup possible.

When a plurality of second recording areas b1 and b2 are set for one first recording area b, if a new first recording area c is set later, there may be no area c1 in which the second recording area c is to be set. Therefore, setting the plurality of second recording areas for one first recording area is preferably performed when the lock is selected by the user.

When recording user data on the optical disc, a lock can be given to the optical disc after recording. When a lock is granted, even if a spare recording area remains, additional recording is impossible. At this time, whether or not the lock is detected is analyzed by analyzing the lock selection signal generated by the user.

The larger the number of the second recording areas for one first recording area, the better the data storage. Therefore, it is better to have as many second recording areas as possible when the lock is selected. According to this, it is advantageous to set the second recording area continuously to the first recording area as shown in FIG. 3 as compared with setting the second recording area behind the intermediate position z as shown in FIG. According to the former, two can be set as b1 and b2 as the second recording area as shown in FIG. 2, but according to the latter, four can be set as b1, b2, b3 and b4 as the second recording area.

In the above, the method of setting the second recording area using the intermediate position and the method of setting the second recording area in succession to the first recording area have been described. However, their advantages are different. Accordingly, in order to take advantage of each of these schemes, the setting unit 130 may receive a lock selection signal to check whether the user selects the lock, and set the second recording area according to whether the lock is selected as follows.

First, when the lock is not selected, the first recording area is set continuously in the lead-in area, and the second recording area is set from the intermediate position of the recording area.

When the lock is selected, the second recording area is set in succession to the first recording area.

In this way, if the second recording area is set differently depending on whether the lock is selected, the recording space of the optical disc can be utilized to the maximum.

On the other hand, if the number of settable second recording areas is plural, the user may feel inconvenient if all the possible number of second recording areas are set even if the lock is selected. For example, when recording 1 Mbyte of user data on an optical disc having a 100 Mbyte recording area, 50 second recording areas are set when a second recording area is formed using an intermediate position. Further, if the second recording area is formed continuously in the first recording area, 99 second recording areas are set.

According to this, the recording time in excess of the time expected by the user is taken. To solve this problem, the setting unit 130 may calculate the settable number of the second recording areas, and set the second recording area by the number of selections within the settable number range. The number of selections is selected and generated by the user, and the settable number for generating the selection number may be displayed to the user. The display of the lock selection signal and the settable number may be displayed to the user through a user data recording program driven by a computer connected to the optical device. The number of selections is determined by the user and is received by the setting unit and used for setting of the second recording area.

4 is a schematic diagram showing another manner in which the optical device of the present invention sets the second recording area on the optical disc.

In view, the recording area of the optical disc is formed of a plurality of recording layers.

At this time, the setting unit 130 sets the second recording area in a recording layer different from the first recording area, and sets the second recording area so that the same data as the user data in the backup data is recorded at different positions in plan view.

For example, an optical disc of an OTP (Opposite Track Path) type system having a two-layer recording area in which a first recording area is set in the first recording layer and a second recording area is set in the second recording layer is assumed.

According to the recording direction of the OTP method, recording is performed in the direction of? For the first recording layer, and recording in the direction of? Opposite to the direction of? For the second recording layer.

At this time, if the capacity of the user data is large, an area 3 where the same data overlaps in plan view is generated in the user data and the backup data. The setting of the second recording area for the backup data is to restore the damaged data by referring to the backup data when the user data is damaged from scratches or foreign matter adhesion such as scratches. However, if a wound or foreign substance adhesion occurs in the region ③, the same data is damaged in both the user data and the backup data, and thus data recovery is impossible.

In order to prevent such a problem, the setting unit 130 sets the second recording area so that the same data as the user data is recorded at different positions in plan view. This prevents the region ③ of FIG. 4 from being generated. For example, in the case of a parallel track path (PTP) method in which the recording direction of the first recording layer and the recording direction of the second recording layer are the same, the area is changed by changing the recording start position of the first recording layer and the recording start position of the second recording layer. ③ can be prevented from being generated.

When the recording area is formed in the plurality of recording layers by the OTP method as shown in Fig. 4, it is difficult to prevent the area 3 from being generated.

When the backup data recorded in the area ③, that is, the data recorded in the same position as the user data in the plan view as the same data as the user data in the backup data, is called the collision data, the setting unit 130 is configured to solve the collision data. 3 The recording area can be set.

In detail, the setting unit 130 sets a second recording area in a recording layer different from the first recording area, and sets a third recording area continuous to a lead out area of the recording layer in which the second recording area is set. Set it. The recording unit then records the collision data in the third recording area. According to the above configuration, by recording the collision data in the third recording area provided separately from the second recording area, the data can be safely stored even if the area ③ is damaged.

The optical device may record the backup data in the area ③ to record the collision data in the third recording area, jump to the third recording area, record the collision data again, and return to the area ③ again to record the remaining backup data. . In this case, the optical pickup unit is inefficiently moving on the optical disc. The storage unit 190 may be provided to prevent this.

The storage unit 190 receives and stores collision data from a setting unit when collision data is generated. In this case, the recording unit 150 may record the collision data stored in the storage unit 190 in the third recording area after the recording of the user data and the backup data is completed. According to this, the recording operation efficiency of the recording unit 150 is improved.

5 is a flowchart illustrating a data backup method of the present invention.

The data backup method shown in FIG. 5 can be described as the operation of the optical device shown in FIG.

First, the recording area capacity of the recording medium is recognized (S510). The operation performed by the recognition unit 110 may indicate a storage capacity of user data and backup data in the optical disc.

Next, the capacity of the user data recorded in the recording area is recognized (S520). The capacity of the recording area and the capacity of the user data, which are performed by the recognition unit 110, and are determined by the recognition unit 110, are used by the setting unit 130 to set the first recording area and the second recording area.

In detail, the setting unit 130 sets a first recording area in which user data is recorded and a second recording area in which backup data of the user data is recorded in the recording area according to the user data capacity recognized by the recognition unit 110 ( S 530).

The recording unit 150 records the user data in the first recording area set in the recording area by the setting unit 130 and records the backup data in the second recording area (S540).

The setting process (S530) of the first recording area and the second recording area is as follows, for example.

The received lock selection signal is analyzed (S 531), and if the lock is not selected (S 532), the first recording area is set continuously in a lead in area, and the first recording area is set from the intermediate position of the recording area. The second recording area is set (S534). If the lock is selected, the second recording area is set as many times as the number of selections subsequent to the first recording area (S 533).

According to the above data backup method, backup data can be generated in an optimal state depending on whether a lock is selected or the like.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

It can be applied to an optical device that can record user data or the like on a recording medium.

In particular, it is advantageous to apply to an optical device that operates a recording medium such as an optical disk that can be lock-selected during data recording.

110 Recognition section 130 ... Setting section
150 ... 190 190 ... Storage

Claims (11)

A recognizing unit for recognizing the capacity of the user data recorded in the recording area of the recording medium;
A setting unit for setting a first recording area in which the user data is recorded and a second recording area in which backup data of the user data is recorded in the recording area according to the recognized user data capacity; And
A recording unit for recording the user data in the first recording area and recording the backup data in the second recording area;
Optical device comprising a.
The method of claim 1,
When the recording area is formed in one recording layer, the setting unit
And setting the first recording area in succession to a lead-in area, and setting the second recording area from an intermediate position of the recording area.
The method of claim 1,
And the setting unit forms a plurality of the second recording areas within a range allowed by the recording area.
The method of claim 1,
And the setting unit sets the second recording area in succession to the first recording area.
The method of claim 1,
And the setting unit calculates the settable number of the second recording areas, and sets the second recording area by the number of selections within the settable number range.
The method of claim 1,
When the recording area is formed in the plurality of recording layers, the setting unit
And the second recording area is set in a recording layer different from the first recording area, and the second recording area is set so that the same data as the user data in the backup data is recorded at a different position in plan view.
The method of claim 1,
The recording area is formed in a plurality of recording layers in an OTP (Opposite Track Path) manner, and the data recorded at the same position as the user data in the plane view as the same data as the user data in the backup data is called collision data. ,
The setting unit sets the second recording area in a recording layer different from the first recording area, and sets a third recording area that is continuous to the lead out area of the recording layer in which the second recording area is set. ,
And the recording unit records the collision data in the third recording area.
The method of claim 7, wherein
A storage unit to store the collision data when the collision data is generated,
And the recording unit records the collision data stored in the storage unit in the third recording area after the recording of the user data and the backup data is completed.
The method of claim 1,
The setting unit receives a lock selection signal,
If the lock is not selected, the first recording area is set in succession to a lead in area, and the second recording area is set from an intermediate position of the recording area.
And setting the second recording area continuously to the first recording area when the lock is selected.
a) recognizing the recording area capacity of the recording medium;
b) recognizing the capacity of user data recorded in the recording area;
c) setting a first recording area in which the user data is recorded and a second recording area in which backup data of the user data is recorded in the recording area according to the recognized user data capacity;
d) recording the user data in the first recording area and recording the backup data in the second recording area;
Data backup method comprising a.
11. The method of claim 10,
The step c)
Analyze the received lock select signal,
If the lock is not selected, the first recording area is set in succession to a lead in area, and the second recording area is set from an intermediate position of the recording area.
And when the lock is selected, setting the second recording area as the number of times of selection consecutively to the first recording area.

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