WO2013014726A1

WO2013014726A1 - Disc determination device and method, computer program, disc device, and audiovisual device

Info

Publication number: WO2013014726A1
Application number: PCT/JP2011/066739
Authority: WO
Inventors: 佐々木　儀央; 靖史大島
Original assignee: パイオニアデジタルデザインアンドマニュファクチャリング株式会社
Priority date: 2011-07-22
Filing date: 2011-07-22
Publication date: 2013-01-31

Abstract

A disc determination device (28) is provided in a disc device (100) provided with an optical pickup (10) capable of shining a laser on an optical disc (50) that has a data recording surface (51) and a label surface (52) on opposite sides from each other. This disc determination device is provided with a reading means (38) and a determining means (38). If an optical disc in the disc device is oriented such that the data recording surface thereof is on the side where the optical pickup is, the reading means reads unique information that is recorded on said data recording surface and is unique to said optical disc. In accordance with the read unique information, the determining means determines whether or not the optical disc in the disc device is one that allows drawing on the label surface thereof.

Description

Disk discriminating apparatus and method, computer program, disk apparatus, and audiovisual apparatus

The present invention relates to a technical field of a disc discriminating apparatus and method for discriminating the type of an optical disc such as a Blu-ray Disc (BD), a computer program, a disc device, and an audio visual device.

As this type of device, for example, a copy protection code is embedded in the BCA (Burst Cutting Area) provided on the recording surface of the Blu-ray disc, and no copy protection code is embedded in the BCA provided on the label surface of the Blu-ray disc. Thus, an apparatus for determining whether or not a label surface is present based on the presence or absence of a copy protection code has been proposed (see Patent Document 1).

Alternatively, for example, the information formed in the information area of the label surface of the optical disk is read, and the time axis of the read information is inverted and decoded to obtain the disk identification code, and the obtained disk identification An apparatus for determining whether an optical disk is a visible image recordable disk based on a code has been proposed (see Patent Document 2).

JP 2005-302145 A JP 2008-33982 A

However, according to the background art described above, there is a technical problem that there is a possibility that the type of the optical disk cannot be sufficiently determined. In particular, there is a technical problem that there is a possibility that BD that can record a visible image such as a character or a pattern on the label surface cannot be sufficiently implemented.

The present invention has been made in view of the above-described problems, for example. A disc discrimination device and method, a computer program, a disc device, and an audio that can appropriately discriminate the type of an optical disc (particularly, BD). It is an object to provide a visual device.

In order to solve the above-described problems, the disk discriminating apparatus of the present invention is mounted on a disk apparatus provided with an optical pickup capable of irradiating an optical laser onto an optical disk having a data recording surface and a label surface arranged to face each other. And reading the unique information specific to the held optical disk recorded on the data recording surface, provided that the optical pickup side surface of the optical disk held by the disk device is a data recording surface. And determination means for determining whether the held optical disk is an optical disk that can be drawn on a label surface in accordance with the read unique information.

According to the disc discriminating apparatus of the present invention, the disc discriminating device is a disc apparatus provided with an optical pickup capable of irradiating an optical laser with respect to an optical disc having a data recording surface and a label surface arranged to face each other. Installed.

For example, the reading means including a memory, a processor, etc. is specific to the held optical disk recorded on the data recording surface on the condition that the optical pickup side surface of the optical disk held in the disk device is a data recording surface. Read specific information of.

“Holding in the disk device” means being held by a holding member such as a cylindrical member fitted in the center hole of the optical disk. The “surface on the optical pickup side” is the surface on the data recording surface and label surface of the optical disc that is irradiated with the optical laser from the optical pickup, in other words, the surface on the data recording surface and label surface that is close to the optical pickup. means.

“Inherent information unique to an optical disc” is information that can identify one optical disc from other optical discs, such as BCA information and Emergency Break. Whether it is a data recording surface or not may be determined by, for example, the intensity of reflected light reflected by the optical disc, the presence or absence of a wobble signal, and the like.

For example, a determination unit including a memory, a processor, a comparator, and the like determines whether the held optical disk is an optical disk that can be drawn on the label surface, according to the read unique information. Here, “drawable” means that a visible image such as a character or a pattern is drawn on the label surface of the optical disc, for example, by thermally decomposing a dye disposed on the label surface of the optical disc by the heat of an optical laser. Means you can.

Here, if information indicating that drawing is possible on the label surface is recorded as specific information on the optical disc that can be drawn on the label surface, the disc discriminating apparatus appropriately discriminates the type of the optical disc. be able to.

In one aspect of the disc discriminating apparatus of the present invention, the unique information is BCA information.

According to this aspect, for example, the unique information can be appropriately read without adding a special configuration for reading the unique information, which is very advantageous in practice.

In this aspect, the determination unit may determine that the held optical disk is an optical disk that can be drawn on a label surface on the condition that a value related to the read unique information is within a predetermined range. .

With this configuration, it is relatively easy to determine whether the held optical disk is an optical disk that can be drawn on the label surface, which is very advantageous in practice.

The determination means determines that the held optical disk is an optical disk that can be drawn on the label surface on the condition that the value related to the read unique information is within a predetermined range. On the other hand, the determination means is typically not an optical disk capable of drawing the held optical disk on the label surface on the condition that the value related to the read unique information is determined not to be within the predetermined range. judge. The “predetermined range” is typically defined by, for example, an optical disk manufacturer or a disk device manufacturer.

Alternatively, in another aspect of the disk discriminating apparatus of the present invention, the unique information is emergency break information.

According to this aspect, it can be determined relatively easily whether or not the held optical disk is an optical disk that can be drawn on the label surface.

In another aspect of the disk discriminating apparatus of the present invention, the held optical disk is a label on the condition that the determining means determines that the held optical disk is an optical disk that can be drawn on a label surface. Notification means for notifying the user of the disc discriminating apparatus that the disc is an optical disc that can be drawn on the surface is further provided.

According to this aspect, the user can relatively easily know whether or not the optical disk held in the disk device is an optical disk that can be drawn on the label surface, which is very advantageous in practice.

In order to solve the above-described problems, the disc discriminating method of the present invention is mounted on a disc apparatus having an optical pickup capable of irradiating an optical laser onto an optical disc having a data recording surface and a label surface arranged to face each other. The disc discriminating method in the disc discriminating apparatus, wherein the holding is recorded on the data recording surface on the condition that the optical pickup side surface of the optical disc held in the disc device is a data recording surface A reading step for reading unique information unique to the optical disc, and a determination step for determining whether the held optical disc is an optical disc that can be drawn on a label surface according to the read unique information; Is provided.

According to the disc discriminating method of the present invention, as in the disc discriminating apparatus of the present invention described above, if information indicating that drawing is possible on the label surface is recorded as unique information on the optical disc that can be drawn on the label surface. Therefore, it is possible to appropriately determine the type of the optical disc.

In the disc discriminating method of the present invention, various aspects similar to the various aspects of the disc discriminating apparatus of the present invention described above can be adopted.

In order to solve the above problems, the computer program of the present invention causes a computer to function as the above-described disk discriminating device of the present invention (including various aspects thereof).

According to the computer program of the present invention, the computer program is provided in a disk device from a recording medium such as a CD-ROM (Compact Read Only Memory) or a DVD-ROM (DVD Read Only Memory) for storing the computer program. The disk discriminating apparatus of the present invention described above can be realized relatively easily if it is read and executed by a computer, or if the computer program is downloaded and then executed via communication means. Thus, as in the case of the disc discriminating apparatus of the present invention described above, if information indicating that drawing is possible on the label surface is recorded as unique information on the optical disc that can be drawn on the label surface, the type of the optical disc The discrimination can be performed appropriately.

In order to solve the above problems, a disk device of the present invention includes a holding means for holding an optical disk having a data recording surface and a label surface that are arranged to face each other, and an optical laser for the held optical disk. Specific information specific to the held optical disc recorded on the data recording surface is provided on the condition that the optical pickup capable of irradiating and the optical pickup side surface of the held optical disc is a data recording surface. Reading means for reading, and determination means for determining whether or not the held optical disk is an optical disk that can be drawn on a label surface in accordance with the read unique information.

According to the disc device of the present invention, as in the disc discriminating device of the present invention described above, if information indicating that drawing is possible on the label surface is recorded as specific information on the optical disc that can be drawn on the label surface, Discrimination of the type of the optical disc can be performed appropriately.

Note that the disk device of the present invention can also adopt various aspects similar to the various aspects of the disk discriminating apparatus of the present invention described above.

In order to solve the above problems, an audio visual apparatus according to the present invention is an optical disk on which the held optical disk can be drawn on a label surface by the above-described disk device of the present invention, a display unit, and the determination unit. Output means for outputting, on the display unit, information indicating that the held optical disk is an optical disk that can be drawn on a label surface.

According to the audio visual apparatus of the present invention, as in the disk discriminating apparatus of the present invention described above, information indicating that drawing is possible on the label surface is recorded as specific information on the optical disk that can be drawn on the label surface. Therefore, it is possible to appropriately determine the type of the optical disc.

It should be noted that the audio visual apparatus of the present invention can also adopt various aspects similar to the various aspects of the disk discriminating apparatus of the present invention described above.

The operation and other advantages of the present invention will be clarified from the embodiments to be described below.

It is a block diagram which shows the structure of the audio visual apparatus which concerns on 1st Embodiment. 1 is a block diagram showing a configuration of a disk device according to a first embodiment. 1 is a cross-sectional view of an optical disc according to a first embodiment. It is sectional drawing of the optical disk which concerns on the comparative example of 1st Embodiment. It is a flowchart which shows the 1st disc discrimination | determination process based on 1st Embodiment. It is a flowchart which shows the 2nd disc discrimination | determination process based on 1st Embodiment. It is an example of the output signal in the disc apparatus which concerns on 1st Embodiment. It is a flowchart which shows the disc discrimination | determination process concerning 2nd Embodiment. It is a flowchart which shows the disc discrimination | determination process concerning 3rd Embodiment.

Hereinafter, embodiments of the disk discriminating apparatus of the present invention will be described with reference to the drawings.

<First Embodiment>
A first embodiment according to the disk discriminating apparatus of the present invention will be described with reference to FIGS.

(Configuration of audio visual equipment)
The configuration of the audio visual apparatus according to the present embodiment will be described with reference to FIG. FIG. 1 is a block diagram showing the configuration of the audiovisual apparatus according to the present embodiment.

1, an audio visual apparatus 500 includes a recording / reproducing apparatus 200 and a television 300 as an example of a “display unit” according to the present invention.

The recording / reproducing apparatus 200 includes a disk device 100 (Optical Disc Drive: ODD), a CPU (Central Processing Unit) 210, a memory 220, an ODD interface 230, a hard disk drive (HDD) 240, an HDD interface 250, a user An interface (UI) controller 260, a tuner 270 electrically connected to the antenna 400, and an audio & video controller 280 are configured.

CPU 210, memory 220, ODD interface 230, HDD interface 250, UI controller 260, tuner 270, and audio & video controller 280 are electrically connected to each other via a bus. The UI controller 260 is configured to receive a signal output from the remote controller 290.

(Disk unit configuration)
Next, the configuration of the disk device 100 according to the present embodiment will be described with reference to FIG. FIG. 2 is a block diagram showing the configuration of the disk device according to the present embodiment.

In FIG. 2, the disk device 100 includes an optical pickup (OPU) 10, a digital signal control unit 20, a spindle motor 31, a spindle driver 32, a thread motor 33, a thread driver 34, and a focusing driver 35. A tracking driver 36, an RF (Radio Frequency) amplifier 37, and a CPU 38.

The optical pickup 10 includes an objective lens 11, a laser diode (LD) 12 that can irradiate the optical disk 50 with a light beam via the objective lens 11, and a light receiving element (PhotoDetector: PD) that can receive reflected light from the optical disk 50. ) 13 and a lens actuator 14 capable of changing the position of the objective lens 11.

The digital signal control unit 20 detects an RF signal based on the signal output from the light receiving element 13 and detects an FE (Focus Error) signal based on the signal output from the light receiving element 13. The FE detection unit 22 and a Push-Pull signal detection unit 23 that detects a Push-Pull signal based on a signal output from the light receiving element 13 are provided.

The spindle driver 32 controls the rotational speed of the spindle motor 31 and the like based on the signal output from the digital signal control unit 20.

The thread driver 34 controls the thread motor 33 so as to change the positional relationship between the optical pickup 10 and the optical disk 50 based on the signal output from the digital signal control unit 20.

Each of the focusing driver 35 and the tracking driver 36 controls the lens actuator 14 so as to change the positional relationship between the objective lens 11 and the optical disc 50 based on the signal output from the digital signal control unit 20.

(Configuration of optical disc)
Next, the configuration of the optical disc according to the present embodiment will be described with reference to FIG. FIG. 3 is a cross-sectional view of the optical disc according to the present embodiment. Here, as an example of the optical disc 50, a recordable Blu-ray disc (for example, BD-R (Blu-ray Disc Recordable) or the like) is cited. In FIG. 3, the scales of the respective layers and members are made different from each other in order to make each layer and each member recognizable on the drawing (the same applies to FIG. 4).

In FIG. 3, an optical disc 50 includes a reflective film layer 54 laminated on one surface of a substrate 53, a data recording layer 55 laminated on the reflective film layer 54, and a data recording layer 55. A laminated cover layer 56, a reflective film layer 57 laminated on the other surface of the substrate 53, a drawing layer 58 laminated on the reflective film layer 57, and a laminated film on the drawing layer 58. And a cover layer 59.

The surface of the cover layer 56 opposite to the surface facing the substrate 53 is the data surface 51, and the surface of the cover layer 59 opposite to the surface facing the substrate 53 is the label surface 52. The distance between the data surface 51 and the label surface 52 (that is, the thickness of the optical disc 50) is, for example, 1.2 mm.

In the data recording layer 55, a BCA 55a in which BCA information is recorded is disposed near the center of the optical disc 50. On the other hand, most of the data recording layer 55 is formed with a land / groove structure 55b. In the drawing layer 58, a BCA 58a in which BCA information is recorded is disposed near the center of the optical disc 50.

In this embodiment, in particular, all optical discs capable of detecting BCA by irradiating a light beam on the label surface side can draw visible images such as characters and designs on the label surface with an optical laser. Suppose that it is a possible optical disc. In other words, a visible image cannot be drawn by the optical laser on the label surface of the optical disc that does not have the BCA 58a.

Here, according to the inventor's research, the following matters have been found. That is, as a DVD that can be drawn on the label surface, for example, Label Flash (registered trademark) exists. However, in Label Flash (registered trademark), a DVD having a thickness of 1.2 mm is configured by bonding two 0.6 mm (millimeter) thickness disks to each other (see FIG. 4).

More specifically, the DVD 600 includes (i) a reflective film layer 640, a data recording layer 650 laminated on the reflective film layer 640, and a cover layer 660 laminated on the data recording layer 650. (Ii) a reflective film layer 670, a drawing layer 680 laminated on the reflective film layer 670, and a cover layer 690 laminated on the drawing layer 680. Are formed by being bonded to each other via a bonding layer 630.

In particular, in the drawing layer 680, in the vicinity of the center of the DVD 600, for example, information indicating that the DVD 600 is an optical disk that can be drawn on a label surface has a CD track pitch (1.6 μm (micrometer)). The area 681 recorded in () is arranged.

Therefore, in order to apply the Label Flash (registered trademark) technology to a BD-R or the like composed of a single disk having a thickness of 1.2 mm, the production process of the BD-R or the like must be reexamined. There is a technical problem that it must not. Therefore, the inventor of the present application newly specified the optical disk 50 shown in FIG. 3 as an optical disk that can be drawn on the label surface. The optical disc 50 may be provided with a bar code indicating the same information as the information recorded on the BCA 58a instead of or in addition to the BCA 58a.

(Disc discriminating process)
Next, disk discrimination processing executed in the disk device 100 configured as described above will be described with reference to the flowchart of FIG.

In FIG. 5, the CPU 38 of the disk device 100 determines whether or not an optical disk is held in the disk device 100 (step S101). When it is determined that the optical disk is not held (step S101: No), the CPU 38 executes the process of step S101.

On the other hand, when it is determined that the optical disk is held (step S101: Yes), the CPU 38 determines that the held optical disk is BD-R, BD-RE (Blu-ray Disc Rewritable), and BD-ROM (Blu-ROM). It is determined whether or not the surface of the optical disc irradiated with the optical laser is a data recording surface (step S102).

Here, in order to determine whether the held optical disk is BD-R, BD-RE, or BD-ROM, various known modes are applied, and the description is omitted. Whether it is the data recording surface or not may be determined by, for example, whether a wobble signal is detected, whether the intensity of reflected light reflected by the optical disk is higher than a predetermined intensity, or the like.

When it is determined that the held optical disk is not one of BD-R, BD-RE, and BD-ROM, or is not a data recording surface (step S102: No), the CPU 38 ends the process once.

On the other hand, when the held optical disc is any one of BD-R, BD-RE, and BD-ROM and is determined to be the data recording surface (step S102: Yes), the CPU 38 holds the held optical disc. The thread driver 34, the focusing driver 35, and the tracking driver 36 are controlled via the digital signal control unit 20 so as to read the BCA data recorded in the BCA of the optical disc (step S103).

Next, the CPU 38 determines whether or not the serial number included in the read BCA data is within a predetermined range (step S104).

Specifically, for example, assuming that an optical disc whose serial number included in the BCA data starts with “9” is preliminarily defined as an optical disc capable of drawing a visible image on the label surface by an optical laser, the CPU 38 reads It is determined whether or not the serial number included in the BCA data starts from “9”. At this time, the CPU 38 typically confirms a DMC (Disc Manufacturer Code) in addition to the serial number.

If it is determined that the serial number included in the read BCA data is not within a predetermined range (step S104: No), the CPU 38 once ends the process. On the other hand, when it is determined that the serial number included in the read BCA data is within a predetermined range (step S104: Yes), the CPU 38 displays the optical disk on the label surface by a light laser. Is determined to be an optical disc that can be drawn (step S105).

Subsequently, the CPU 38 notifies the user that the optical disk held in the disk device 100 is an optical disk capable of drawing a visible image on the label surface with an optical laser (step S106). At this time, the audio & video controller 280 of the audio visual apparatus 500 displays on the screen that the optical disk held in the disk apparatus 100 is an optical disk that can draw a visible image on the label surface with an optical laser. Thus, a signal is transmitted to the television 300.

At this time, the CPU 38 further draws a visible image on the label surface, information recorded on the data recording surface of the optical disk currently held, information stored in the hard disk drive 240 of the audio visual device 500. , EPG (Electronic Program Guide) is available to the user (step S107).

Next, for example, in the process of step S106, a user who has been notified that the held optical disk is an optical disk capable of drawing a visible image on the label surface, moves the held optical disk from the disk device 100. The operation of the disc apparatus 100 when it is once taken out and set to the disc apparatus 100 again so that the label surface of the optical disc is on the optical pickup 10 side will be described with reference to the flowchart of FIG.

In FIG. 6, the CPU 38 determines whether or not an optical disk is held in the disk device 100 (step S201). When it is determined that the optical disk is not held (step S201: No), the CPU 38 executes the process of step S101.

On the other hand, when it is determined that the optical disk is held (step S201: Yes), the CPU 38 determines whether the surface of the held optical disk irradiated with the optical laser is a label surface (step S202). ). When it is determined that the surface irradiated with the optical laser is not a label surface (step S202: No), the CPU 38 once ends the process.

On the other hand, when it is determined that the surface irradiated with the optical laser is the label surface (step S202: Yes), the CPU 38 determines whether or not BCA exists on the label surface (step S203).

Here, whether or not it is a label surface may be determined, for example, as follows. A signal output from the light receiving element 13 or the like when an optical laser is irradiated on the label surface will be described with reference to FIG.

FIG. 7 is an example of an output signal output when the thickness of the cover layer 59 of the optical disc 50 (see FIG. 3) is 100 μm. In FIG. 7, signals s1, s2, and s3 are a “focus error signal”, a “total received light amount”, and a “lens actuator drive signal”, respectively.

In FIG. 7, the reflected light reflected by the label surface 52 of the optical disc 50 is detected before and after time t1, and the reflected light reflected by the drawing layer 58 of the optical disc 50 is detected before and after time t2.

As shown in FIG. 7, the peak amplitude of the detected signal differs depending on the thickness of the cover layer 59 of the optical disc 50. However, the peak amplitude when the reflected light reflected by the drawing layer 58 of the optical disc 50 is detected and the peak amplitude when the reflected light reflected by the data recording layer 55 of the optical disc 50 is detected are notable. It has been found by the inventor's research that there is a difference. Therefore, if the peak amplitude is compared with the predetermined threshold value, it can be determined relatively easily whether or not the label surface is reached.

Returning to FIG. 6 again, if it is determined in step S203 that there is no BCA (step S203: No), the CPU 38 once ends the process. On the other hand, when it is determined that the BCA exists (step S203: Yes), the CPU 38 determines that the optical disk is an optical disk that can draw a visible image on the label surface with an optical laser (step S204).

The “CPU 38” according to the present embodiment is an example of the “disk discriminating device”, “reading unit”, “determination unit”, and “notification unit” according to the present invention. “Disk device 100”, “data surface 51”, and “BCA 58a” according to the present embodiment are examples of “disk device”, “data recording surface”, and “unique information” according to the present invention, respectively.

<Second Embodiment>
A second embodiment according to the disk discriminating apparatus of the present invention will be described with reference to FIG. In the second embodiment, the configuration is the same as that of the first embodiment, except that the disc discrimination process is partially different. Therefore, in the second embodiment, the description overlapping with that of the first embodiment is omitted, and the common portions in the drawing are denoted by the same reference numerals, and only the points that are basically different refer to the flowchart of FIG. To explain.

(Disc discriminating process)
In FIG. 8, it is determined in the process of step S102 described above (see FIG. 5) that the held optical disk is any one of BD-R, BD-RE, and BD-ROM and is a data recording surface. In the case (step S102: Yes), the CPU 38 controls the thread driver 34, the focusing driver 35, and the tracking driver 36 via the digital signal control unit 20 so as to read the emergency break information of the held optical disc (step S102: Yes). Step S301).

Next, based on the read Emergency Break information (specifically, for example, based on “Drive Actions” included in the Emergency Break information), the CPU 38 puts the held optical disc on the label surface of the optical disc. It is determined whether or not the optical disk is capable of drawing a visible image (step S302). When it is determined that the optical disk is not capable of drawing a visible image on the label surface (step S302: No), the CPU 38 once ends the process.

On the other hand, when it is determined that the optical disk is capable of drawing a visible image on the label surface (step S302: Yes), the CPU 38 is an optical disk capable of drawing a visible image on the label surface with an optical laser. (Step S303).

Next, the CPU 38 determines whether or not the disc device 100 can draw a visible image on the label surface of the optical disc based on the read Emergency Break information (step S304).

When it is determined that the disk device 100 can draw a visible image on the label surface of the optical disk (step S304: Yes), the CPU 38 detects that the optical disk held by the disk device 100 is an optical laser on the label surface. Thus, the user is notified that the visible image can be drawn on the label surface of the optical disc by the disc device 100 (step S305).

On the other hand, when it is determined that the disk device 100 cannot draw a visible image on the label surface of the optical disk (step S304: No), the CPU 38 detects that the optical disk held in the disk device 100 is an optical laser on the label surface. However, the disc apparatus 100 notifies the user that the visible image cannot be drawn on the label surface of the optical disc (step S306).

The “Emergency Break information” according to the present embodiment is another example of the “unique information” according to the present invention.

<Third Embodiment>
A third embodiment according to the disk discriminating apparatus of the present invention will be described with reference to FIG. In the third embodiment, the configuration is the same as that of the first embodiment, except that the disc discrimination process is partially different. Accordingly, the description of the third embodiment that is the same as that of the first embodiment is omitted, and common portions in the drawing are denoted by the same reference numerals, and only the differences are basically referred to the flowchart of FIG. To explain.

(Disc discriminating process)
9, after the process of step S106 described above (see FIG. 5), the CPU 38 stores the serial number and DMC that are the same as the serial number and DMC recorded in the BCA, for example, in a memory (not shown) or the like. It is determined whether it has been performed (step S401).

When it is determined that the serial number and DMC that are the same as the serial number and DMC recorded in the BCA are stored in the memory or the like (step S401: Yes), the CPU 38 is the optical disk currently held in the disk device 100. Is determined to be an optical disc on which a visible image has been previously drawn on the label surface in the disc device 100, and a visible image has been previously drawn on the label surface and / or when a visible image is drawn on the label surface. In addition, the user is notified that the information recorded on the data recording surface of the optical disc currently held, the information stored in the hard disk drive 240 of the audio visual device 500, EPG, etc. can be used (step S402).

On the other hand, when it is determined that the serial number recorded in the BCA and the same serial number and DMC as the DMC are not stored in the memory or the like (step S402: No), the CPU 38 ends the process once.

With this configuration, it is possible to effectively prevent the user from inadvertently erasing information stored in the hard disk drive 240 or the like before drawing a visible image on the label surface, for example. Can do.

The present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the scope or spirit of the invention that can be read from the claims and the entire specification. Methods, computer programs, disk devices, and audiovisual devices are also within the scope of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Optical pick-up, 20 ... Digital signal control part, 38 ... CPU, 50 ... Optical disk, 100 ... Disk apparatus, 200 ... Recording / reproducing apparatus, 300 ... Television, 500 ... Audio visual apparatus

Claims

It is mounted on a disk device equipped with an optical pickup capable of irradiating an optical laser to an optical disk having a data recording surface and a label surface arranged opposite to each other,
Reading means for reading unique information specific to the held optical disk recorded on the data recording surface, on the condition that the optical pickup side surface of the optical disk held by the disk device is a data recording surface; ,
Determining means for determining whether or not the held optical disc is an optical disc that can be drawn on a label surface, according to the read unique information;
A disk discriminating apparatus comprising:
2. The disk discriminating apparatus according to claim 1, wherein the unique information is BCA information.
The determination means determines that the held optical disk is an optical disk that can be drawn on a label surface on the condition that a value related to the read unique information is within a predetermined range. Item 3. The disk discrimination device according to Item 2.
2. The disc discriminating apparatus according to claim 1, wherein the unique information is emergency break information.
If the determination means determines that the held optical disk is an optical disk that can be drawn on a label surface, the held optical disk is an optical disk that can be drawn on a label surface. 2. The disk discriminating apparatus according to claim 1, further comprising notifying means for notifying a user of the disc discriminating apparatus.
A disc discriminating method in a disc discriminating device mounted on a disc device provided with an optical pickup capable of irradiating an optical laser to an optical disc having a data recording surface and a label surface arranged to face each other,
A step of reading specific information unique to the held optical disk recorded on the data recording surface, on the condition that the optical pickup side surface of the optical disk held by the disk device is a data recording surface; ,
A determination step of determining whether the held optical disc is an optical disc that can be drawn on a label surface, according to the read unique information;
A disc discriminating method comprising:
A computer program for causing a computer to function as the disc discrimination device according to claim 1.
Holding means for holding an optical disc having a data recording surface and a label surface arranged opposite to each other;
An optical pickup capable of irradiating an optical laser to the held optical disk;
Reading means for reading the unique information unique to the held optical disk recorded on the data recording surface, on the condition that the surface on the optical pickup side of the held optical disc is a data recording surface;
Determining means for determining whether or not the held optical disc is an optical disc that can be drawn on a label surface, according to the read unique information;
A disk device comprising:
A disk device according to claim 8,
A display unit;
Information indicating that the held optical disk is an optical disk that can be drawn on a label surface on the condition that the determination means determines that the held optical disk is an optical disk that can be drawn on a label surface. Output means for outputting on the display unit,
An audiovisual device comprising: