JP2006172602A - Optical disk, disk reproducing device, and disk recording and reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To appropriately indicate the propriety of wipe-off of an optical disk to a user, especially, to indicate the propriety of the wipe-off of the hard-coated disk by appropriate timing. <P>SOLUTION: In a recording and reproducing device 110 for reproducing the disk (optical disk) 100, a hard-coat presence determining part 116 determines whether a hard coat treatment is performed on the surface of the disk or not, based on information which is recorded in the prescribed information area of the disk read by the optical pickup 111. When the hard coat treatment is performed, a threshold setting part 117 sets a threshold for the hard-coated disk. A taint damage inspecting part 119 performs the inspection of a taint damage on the surface of the disk and calculates the largeness of the taint damage. A comparing part 120 compares the threshold with the largeness of the taint damage on the disk surface. When the taint damage is not less than the threshold, necessity for wiping-off the disk is reported to the user. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a portable information reproducing or information recording / reproducing optical disc for reproducing or recording information, a disc reproducing apparatus for reproducing information stored in the optical disc, or information on an optical disc. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk recording / reproducing apparatus that records and reproduces information stored in an optical disk, and in particular, an optical disk that is not protected by a cartridge and the user directly touches the surface, and is stored in the optical disk The present invention relates to a disk reproducing apparatus or a disk recording / reproducing apparatus that performs information reproduction or recording / reproduction.

  Currently, information storage discs (recording media, recording media) such as CDs (Compact Discs) and DVDs (Digital Versatile Discs) are widely used as optical discs, and Blu-ray Disc (registered trademark, hereinafter referred to as BD). And information storage discs such as HD DVD (High Definition DVD) are being developed and put to practical use. Note that the above-described optical discs include a read-only disc that can only be played back and a recording and playback disc that can be recorded and played back. Many of these information storage discs (hereinafter sometimes simply referred to as “discs”) are not protected by a protective member such as a cartridge, and a user can read the disc surface (reading surface on which recording light or reproduction light is incident). ) Is a bare disk type that can be handled directly by hand. In addition, most of the current BDs are of the cartridge type protected by a cartridge, but in the future, a transition to a bare disk has been proposed.

  Such information storage discs have a great influence on information recording and reproduction due to scratches, dust, dust, fingerprints, dirt, and the like on the surface of the disc. In the present specification, scratches, dust, dust, fingerprints, dirt, and the like attached to the disk surface are referred to as contamination. For example, when recording information, information is recorded in a state where the recording mark is deteriorated due to the influence of contamination on the surface of the disk, and it becomes impossible to store accurate information on the disk. The information stored in is read with deteriorated reproduction light affected by the contamination of the disk surface, and the information cannot be read accurately. Therefore, it can be said that the influence of the contamination on the disk surface appears more greatly at the time of recording information than at the time of reproducing information.

  On the other hand, for example, as described in Patent Document 1 below, there is a technique for making a disc surface particularly difficult to be scratched by applying a special coating process (hard coat process) to the disk surface. . The disc disclosed in Patent Document 1 includes a disc substrate formed by injection molding of a polycarbonate resin, a hard coat layer made of a hard coat agent composition containing a cationic polymerization curable compound, antifouling and It has a structure in which an antifouling surface layer made of a cured material of a surface layer material containing a cationic polymerization curable compound having a lubricating function is laminated and fixed. Note that the hard coat treatment is not limited to the technique disclosed in Patent Document 1, and in this specification, the entire hard coat treatment is performed for the purpose of giving a predetermined hardness to the disk surface. This is called processing.

Of the various optical discs described above, BD has a drawback that the thickness of the transparent protective layer is thin and the influence of contamination on the disc surface is large. It is considered essential to perform processing. Note that many optical disks are not hard-coated, and only some of the optical disks are hard-coated.
JP 2003-315503 A (FIGS. 1 and 2)

  However, in Patent Document 1, a hard coat layer for protecting from scratches and an antifouling surface layer for protecting from dirt are formed on the disk surface. In particular, it is inevitable that dust and fingerprints adhere to the surface of the disk, and the dust and fingerprints that are attached are wiped off by the user as appropriate.

  The disc surface that has been subjected to the hard coat process has a reduced possibility of being scratched by the user's wiping action due to the action of the hard coat layer. It can be said that the wiping action by the user is recommended compared to the non-hard-coated disc.

  However, the user is often careless with respect to the presence or absence of the hard coat process, because the number of disks subjected to the hard coat process is small as described above. As a result, the user may inadvertently wipe a non-hard-coated disc and scratch it, or even if it is a hard-coated disc. There is a problem that the necessity of wiping the disc is not fully understood, such as not performing an act.

  In addition, the user's wiping action is never simple, and there is a great difference in disc wiping technology depending on individual users. Therefore, for example, the user performs a wiping action in spite of the fact that the wiping of the disk is unnecessary (that is, the case where there is a degree of contamination that does not affect the recording / reproducing of information). Small dust may be attached to the surface, and simply instructing the user to always wipe off results in fouling that adversely affects disc recording and playback. There is a problem that it may end up.

  In view of the above-described problems, an object of the present invention is to provide an optical disc and a disc reproducing apparatus or disc recording / reproducing apparatus that can appropriately instruct a user whether or not to wipe a disc.

In order to achieve the above object, according to the present invention, an optical disk for information reproduction or information recording / reproduction,
There is provided an optical disc having an information area in which information is recorded so that it is possible to determine whether or not a hard coat process is performed on a light incident surface when information is recorded or reproduced.

In order to achieve the above object, according to the present invention, a disk reproducing apparatus for reproducing information stored on an optical disk, or information recorded on an optical disk and information stored on the optical disk is reproduced. A disc recording / reproducing apparatus,
An information reading unit for reading information stored in the optical disc by light;
Based on information read from a predetermined information area of the optical disc by the information reading unit, a hard coat presence / absence discriminating means for discriminating whether or not a hard coat process is applied to the light incident surface of the optical disc;
A contamination inspection means for inspecting contamination existing on the light incident surface of the optical disc;
Based on the determination result by the hard coat presence / absence determination unit and the inspection result of the contamination by the contamination inspection unit, a wiping necessity determination unit that determines the necessity of wiping the light incident surface of the optical disc;
Informing means for informing that wiping of the light incident surface of the optical disc determined by the wiping necessity determining means is necessary,
A disc playback device or a disc recording / playback device is provided.

  The present invention has the above-described configuration, and has an effect that it is possible to appropriately instruct the user whether or not it is necessary to wipe the disc. In addition, the present invention particularly makes it possible to fully utilize the advantages of a hard-coated disk that can be wiped off, and to instruct the necessity of wiping the hard-coated disk at an appropriate timing. have.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration example of a recording / reproducing apparatus according to an embodiment of the present invention. 1 includes an optical pickup 111, a servo signal processing unit 112, a signal recording circuit 113, a signal reproduction circuit 114, a media type determination unit 115, a hard coat presence / absence determination unit 116, and a threshold setting unit 117. , A threshold storage unit 118, a fouling inspection unit 119, a comparison unit (wiping necessity determination unit) 120, and a notification unit 121. Note that, for example, the recording / reproducing apparatus 110 includes various other components including a control circuit, but is not illustrated here.

  An optical pickup 111 shown in FIG. 1 has a function of reading and writing a signal recorded on the disk 100, and includes, for example, a lens, a light receiving element, and a semiconductor laser. The optical pickup 111 has different characteristics depending on the type of the disk 100. The servo signal processing unit 112 also performs focus servo control that keeps the distance between the disk 100 and the optical pickup 111 constant, tracking servo control that performs tracking control of the optical pickup 111 with respect to the pits on the disk 100, and the radial direction of the disk 100. It has a function for performing operation control of the optical pickup 111 including feed servo control for performing movement control of the optical pickup 111 and the like.

  The signal recording circuit 113 has a function of converting recording data processed by the recording / reproducing apparatus 110 into a signal for writing to the disc 100, and the signal reproducing circuit 114 is a signal read from the disc 100. Has a function of converting the data into reproduction data for reproduction by the recording / reproduction device 110.

  The media type discriminating unit 115 also determines the type of the disc 100 (CD, DVD, BD, HD DVD described above) and the disc 100 for reproduction only based on information read from a predetermined information area of the disc 100. It has a function of discriminating information indicating whether it is for recording or reproduction. A determination result such as the type of the disc 100 determined by the media type determination unit 115 is supplied to the threshold setting unit 117.

  Further, the hard coat presence / absence discriminating unit 116 determines whether or not the hard coat has been applied to the disc 100 based on at least information read from the disc 100 (a flag or other discrimination information in a hard coat information area described later). It has the function to discriminate. Information relating to the presence / absence of the hard coat determined by the hard coat presence / absence determining unit 116 is supplied to the threshold setting unit 117. The determination of the presence or absence of the hard coat will be described later with reference to FIG.

  The threshold setting unit 117 also determines the disc 100 type received from the media type discriminating unit 115, information on the presence / absence of the hard coat received from the hard coat presence / absence discriminating unit 116, and the mode setting unit (non- A function for determining a threshold value serving as a reference for determining whether or not the disk 100 needs to be wiped based on various conditions such as mode information (information indicating whether the mode is a reproduction mode or a recording mode) Yes. The threshold set by the threshold setting unit 117 is supplied to the comparison unit 120.

  The threshold storage unit 118 has a function of storing threshold values set by the threshold setting unit 117 corresponding to various conditions. The threshold setting unit 117 checks the above conditions. Then, the threshold value that meets the condition is read from the threshold value storage unit 118 and supplied to the comparison unit 120.

  Further, the contamination inspection unit 119 has a function of checking the presence of contamination on the disk surface and the size of the contamination. The result of the contamination inspection in the contamination inspection unit 119 is supplied to the comparison unit 120. Details regarding the inspection of contamination will be described later.

  Further, the comparison unit 120 compares the threshold received from the threshold setting unit 117 with the contamination inspection result (for example, the size of the contamination) received from the contamination inspection unit 119, and determines the necessity of wiping the disk surface. It has a function. The comparison result by the comparison unit 120 (whether or not the disk surface needs to be wiped) is supplied to the notification unit 121.

  In addition, the notification unit 121 is a display unit that performs image notification to the user, an audio output unit that performs audio notification, and the like, and specifically displays video information recorded on the disc 100. And a speaker for outputting audio information.

  Next, operations performed in the recording / reproducing apparatus 110 shown in FIG. 1 will be described with reference to FIG. FIG. 2 is a flowchart showing an example of the operation in the embodiment of the present invention.

  For example, when loading the disk 100, the recording / reproducing apparatus 110 locks the focus servo and tracking servo, and from a predetermined information area of the disk 100, the type of the disk 100, a reproduction-only disk, or a recording / reproduction disk. Information indicating the presence is read (step S201: focus servo and tracking servo lock / disc type determination). The following operations are not necessarily performed when the disc 100 is loaded. For example, when the user performs an operation for requesting an inspection of the disc surface, or between the playback mode and the recording mode in the recording / reproducing apparatus 110. Or may be made at any other timing.

  Subsequently, the hard coat presence / absence determining unit 116 of the recording / reproducing apparatus 110 determines whether or not the hard coat process is performed on the disc 100 (step S202: presence / absence of hard coat). The details of the process for determining whether or not the hard disk process is applied to the disk 100 will be described later with reference to FIG.

  If it is determined in step S202 that the hard coat process is applied to the disc 100, the threshold setting unit 117 of the recording / reproducing apparatus 110 sets the threshold TH for the disc 100 to TH = TH_A ( Step S203: Set threshold TH = TH_A), if it is determined that the hard coat process has not been applied to the disc 100, set the threshold TH for this disc 100 to TH = TH_B (Step S204: Threshold TH = Set to TH_B). Note that the operation of the disc 100 that has not been subjected to the hard coating process may be terminated as it is, assuming that the wiping of the disc surface is not recommended.

  The relationship between TH_A and TH_B is preferably TH_A <TH_B. As will be described later, the amount of contamination that may cause a problem during recording / reproduction of the disc 100 is usually about 0.3 to 0.6 mm. For example, TH_A = 0.3, TH_B = 0.5. Is possible. It is also possible to set different values of TH_A and TH_B depending on the type of the disc 100.

  Next, the contamination inspection unit 119 of the recording / reproducing apparatus 110 performs contamination inspection on the disk surface (step S205: inspection of the disk surface). Although any method can be used for the contamination inspection method, an example of a method for performing the inspection in a short time will be described below.

  In the present invention, attention is paid to fouling such as scratches, dust and dirt present on the disk surface. Light emitted from the optical pickup 111 has a condensing point at a position deeper than the disk surface by the thickness of the transmission layer, and a light beam having a relatively large diameter is transmitted through the disk surface. Therefore, since the light beam forms a light projection portion having a relatively large diameter on the disk surface, even when the scanning increment of the optical pickup 111 is increased to some extent when the disk surface is inspected, the contamination to be inspected is overlooked. There is nothing. Further, the size of contamination that may cause a problem during recording / reproduction of the disk 100 is usually about 0.3 to 0.6 mm.

  From the above, the scanning pitch in the radial direction when the disc surface is inspected for contamination can be set to 0.15 to 0.3 mm, for example. In this case, the time required for scanning for inspection of the entire reading surface of the disk 100 (inspection time) is about 3 to 6 seconds. With such an inspection time, it is practically possible for the user to wait. For example, when the disk 100 is loaded, the disk is within the allowable time that the user can wait as the processing time. It is fully possible to inspect 100 surfaces. In the inspection of the surface of the disk 100, for example, it is possible to calculate the size of the contamination by measuring the length of the fall time of the reflected light amount and converting the fall time to the actual size.

  In the disk surface inspection in step S205, the value of the degree of contamination attached to the disk surface is obtained as the inspection result CHK. As the value of the inspection result CHK, for example, the maximum contamination size among the contaminations detected by the inspection of the disk surface is set.

  Then, the comparison unit 120 of the recording / reproducing apparatus 110 compares the value of the disk surface inspection result CHK performed in step S205 with the threshold value TH set in step S203 or S204 (step S206: inspection). Comparison of result CHK with threshold TH). If the inspection result CHK is equal to or greater than the threshold value TH (CHK ≧ TH), a notification indicating that the disk surface needs to be wiped is performed (step S207: notification that the disk needs to be wiped), and the inspection result. If CHK is smaller than the threshold value TH (CHK <TH), a notification indicating that wiping of the disk surface is not required is performed (step S208: notification that wiping of the disk is not required). When the inspection result CHK is smaller than the threshold value TH (CHK <TH), it is not always necessary to notify that the wiping of the disk 100 is unnecessary, and in step S208, the operation ends without any notification. It is also possible.

  FIG. 3 is a diagram showing an example of a display screen that displays that the disk surface needs to be wiped in the recording / reproducing apparatus according to the embodiment of the present invention. When a contamination having a size greater than or equal to the threshold value TH is found on the disk surface by the operation of the flowchart shown in FIG. 2, the recording / reproducing apparatus 110 “is present on the outer peripheral portion of this disk” as shown in FIG. Please wipe off the dirt. The user is informed of a message prompting the user to wipe the disc 100. In the disk surface inspection performed in step S205, it is possible to grasp the location where the disk surface is contaminated, and notify that the disk surface needs to be wiped, and adhere to the disk surface, for example. You may visually indicate the location of the fouling.

  Further, as shown in FIG. 3, it may be notified whether or not the hard disk process is performed on the disc 100 to be inspected. As a result, for example, in the case of the disc 100 that has not been subjected to the hard coat process, it is possible to call attention regarding handling when the disc 100 is wiped off.

  FIG. 4 is a diagram schematically showing the necessity of wiping the disc in the embodiment of the present invention. 4 shows the threshold value TH set in step S203 or step S204 in the flowchart shown in FIG. 2 and the inspection result CHK obtained in step S206 in the flowchart shown in FIG. The relationship between necessity and non-necessity is schematically shown.

  The horizontal axis of FIG. 4 shows the value of the inspection result CHK obtained in step S206 of the flowchart shown in FIG. Further, the inspection result CHK is the degree of contamination on the disk surface (for example, the maximum degree of contamination existing on the disk surface). Below the horizontal axis in FIG. The size of the circle corresponding to the inspection result CHK is schematically shown by the circle. With the above operation, as shown in FIG. 4, when the inspection result CHK is equal to or greater than the threshold value TH, it is determined that the disk surface needs to be wiped. When the inspection result CHK is smaller than the threshold value TH, the disk surface is wiped. Is deemed unnecessary.

  In the above operation, the test result CHK is compared with one threshold value TH to determine whether or not the disk surface needs to be wiped. Two or more values are prepared for each of TH_A and TH_B. It is also possible to compare with the inspection result CHK. In this case, for example, when the inspection result CHK is compared with two threshold values TH, in addition to the determination results that “the disk surface needs to be wiped” and “the disk surface does not need to be wiped”, A judgment result such as “Recommend wiping the disk surface” is set.

  As described above, according to the present invention, it is determined whether or not the hard disk processing is performed on the disk 100. If the hard disk processing is performed on the disk 100, the surface of the disk may be damaged. It is possible to perform an inspection, determine whether or not it is necessary to wipe the disk surface according to the level of contamination, and notify the user of the determination result. Similarly, even when the hard coating process is not performed on the disc 100, the necessity of wiping the disc surface is determined according to the level of contamination on the disc surface, and the determination result is notified to the user. Is also possible. It is also possible to change the reference (threshold value TH) for determining the necessity of wiping the disk surface in accordance with the presence or absence of the hard coat process.

  Next, with reference to FIG. 5, an operation for determining whether or not the hard coating process has been performed on the disk 100 will be described. FIG. 5 is a flowchart showing details of the operation for determining whether or not the hard coat process is applied to the disk in the embodiment of the present invention. Note that the flowchart shown in FIG. 5 shows details of the operation of the portion A in FIG. 2 (S202 in the flowchart shown in FIG. 2).

  After the processing in step S201 shown in FIG. 2, the recording / reproducing apparatus 110 reads physical information stored in advance at a predetermined data recording location on the disc 100 (step S2021: reads physical information on the disc). It is determined whether or not a hard coat information area exists in the information (step S2022: presence or absence of a hard coat information area). The hard coat information area is, for example, a 1-bit information recording area set by the disk 100 manufacturer when the disk is manufactured. Then, 1 (flag) is set in the hard coat information area for the disk 100 that has been subjected to the hard coat process, and 0 is set in the hard coat information area for the disk 100 that has not been subjected to the hard coat process. .

  If there is a hard code information area in the physical information of the disk 100, it further reads whether or not a flag is set (step S2023: presence / absence of a flag). After grasping that the coating process is performed, the process proceeds to step S203 shown in FIG. If the flag does not exist, it is determined that the hard coat process has not been applied to the disk 100, and the process proceeds to step S204 shown in FIG.

  On the other hand, when the hard coat information area does not exist in the physical information of the disc 100, it is attempted to determine whether or not the hard coat processing is performed based on other determination information recorded on the disc 100. That is, the recording / reproducing apparatus 110 acquires arbitrary discrimination information from the disc 100 (step S2024: obtains other discrimination information), and refers to a predetermined correspondence table that exists in a state that the recording / reproducing apparatus 110 can refer to. (See step S2025: correspondence table). If the reference result indicates that the hard coat process is applied to the disc 100, the process proceeds to step S203 shown in FIG. The process proceeds to step S204 shown in FIG.

  Here, the relationship between the discrimination information and the correspondence table will be described. As the discriminating information, for example, version information related to the type of the disc 100, a product identification number of the disc 100, or the like can be used. In an example in which version information related to the type of the disc 100 is used, for example, in the case of BD, version information of the BD standard can be used as discrimination information. When the BD standard is version 1.0, the disc 100 is protected by a cartridge and can be regarded as not being subjected to a hard coat process. Further, when the BD standard is version 2.0 or later, it is specified that the disk 100 has a hardness that cannot be realized unless the hard coat process is performed. It can be regarded as being given. Therefore, the recording / reproducing apparatus 110 refers to the predetermined correspondence table in which the information “BD version 1.0 = no hard coat processing” and “BD version 2.0 or later = hard coat processing” is described. Thus, it is possible to determine the presence or absence of hard coat processing on the disc 100 using the version information of the BD standard as the determination information.

  Further, in the example using the product identification number of the disc 100, for example, the correspondence relationship between the product identification number of the disc 100 and the presence / absence of hard coat processing is described in a predetermined correspondence table referred to by the recording / reproducing apparatus 110. Thus, the recording / reproducing apparatus 110 can determine the presence / absence of the hard coat processing of the disc 100 using the product identification number of the disc 100 as discrimination information.

  For example, the manufacturer may store the correspondence table in a predetermined correspondence table storage unit (not shown) in the recording / reproducing apparatus 110 so that the recording / reproducing apparatus 110 can refer to the correspondence table. In addition, by providing the recording / reproducing apparatus 110 with a communication function for connecting to a network, the recording / reproducing apparatus 110 uses this communication function to access a predetermined correspondence table storage server and store a predetermined correspondence table. It is also possible to refer to a correspondence table in the server, or to receive and hold a correspondence table distributed from a predetermined correspondence table storage server periodically or when information is updated.

  In particular, by enabling the recording / reproducing device 110 to refer to or obtain the correspondence table from a predetermined correspondence table storage server using the communication function, the recording / reproducing device 110 can, for example, newly sell the product of the disc 100. It becomes possible to always refer to the latest information, such as making it possible to grasp the correspondence between the identification number and the presence or absence of hard coat processing.

  In the flowchart of FIG. 2, the threshold value TH is changed depending on whether or not the hard coat process is applied to the disc 100. Further, whether the disc 100 is for reproduction only or for recording and reproduction. It is also possible to set the threshold value TH by determining whether the recording / reproducing apparatus 110 is in the recording mode or the reproducing mode.

  First, the operation shown in FIG. 6 will be described. FIG. 6 is a flowchart showing a first example of an operation related to setting of a threshold value TH that serves as a reference for determining whether or not it is necessary to wipe the disc 100 in the embodiment of the present invention. Note that the flowchart shown in FIG. 6 is another operation example of the portion B in FIG. 2 (steps S202 to S204 in the flowchart shown in FIG. 2).

  After the process in step S202 shown in FIG. 2, the hard coat presence / absence determining unit 116 of the recording / reproducing apparatus 110 determines whether or not the hard disk process is performed on the disc 100 (step S601: presence / absence of hard coat). The details of the process for determining whether or not the hard disk process is applied to the disk 100 are the same as the above-described operation described with reference to FIG.

  Further, in each case, whether the disk 100 is for reproduction or recording / reproduction is checked regardless of whether or not the hard coat processing is applied to the disk 100 in step S601 (steps S602 and S603: reproduction only). Whether the disc 100 is for reproduction or recording / reproduction can be checked, for example, by referring to information indicating reproduction-only or recording / reproduction recorded as physical information of the disc 100. As in the above-described operation example, the operation of the disc 100 that has not been subjected to the hard coat process may be terminated as it is, because it is not recommended that the disc surface be wiped off.

  By the operations in steps S601 to S603 described above, “with hard coat processing, reproduction only”, “with hard coating processing, for recording / reproduction”, “without hard coating processing, only for reproduction”, “without hard coating processing, recording / reproduction” Cases are divided into four cases. Then, in the case of “with hard coat processing and dedicated to reproduction”, TH = TH_C is set to the threshold value TH (step S604: set to threshold value TH = TH_C), and in the case of “with hard coating processing and for recording and reproduction”. TH = TH_D is set to the threshold TH (step S605: set to threshold TH = TH_D), and in the case of “no hard coat process, reproduction only”, TH = TH_E is set to the threshold TH (step S606: threshold TH = In the case of “no hard coat processing, for recording / reproduction”, TH = TH_F is set to the threshold value TH (step S607: threshold value TH = TH_F is set).

  At this time, in consideration of the fact that the recording / reproducing disc is recorded in addition to the reproduction, the influence of the contamination on the disc surface is greater, and the relationship of TH_C, TH_D, TH_E, TH_F is TH_C ≦ TH_D <TH_E. It is desirable that ≦ TH_F. As described above, the amount of contamination that may cause a problem during recording / reproduction of the disc 100 is usually about 0.3 to 0.6 mm. For example, TH_C = 0.3, TH_D = 0.4. , TH_E = 0.5 and TH_F = 0.6. It is also possible to set different values of TH_C, TH_D, TH_E, and TH_F depending on the type of the disc 100. Two or more values are prepared for each of TH_C, TH_D, TH_E, and TH_F, and the inspection result is obtained. It is also possible to perform comparison with CHK.

  Next, the operation shown in FIG. 7 will be described. FIG. 7 is a flowchart showing a second example of an operation related to setting of a threshold value TH serving as a reference for determining whether or not it is necessary to wipe a disc in the embodiment of the present invention. Note that the flowchart shown in FIG. 7 is another operation example of the portion B in FIG. 2 (steps S202 to S204 in the flowchart shown in FIG. 2).

  After the process in step S202 shown in FIG. 2, the hard coat presence / absence determining unit 116 of the recording / reproducing apparatus 110 determines whether or not the hard coat process is performed on the disc 100 (step S701: presence / absence of hard coat). The details of the process for determining whether or not the hard disk process is applied to the disk 100 are the same as the above-described operation described with reference to FIG.

  Further, in each case, whether the disk 100 is for reproduction or recording / reproduction is checked regardless of whether or not the hard coat processing is applied to the disk 100 in step S701 (steps S702 and S703: reproduction only). Whether the disc 100 is for reproduction or recording / reproduction can be checked, for example, by referring to information indicating reproduction-only or recording / reproduction recorded as physical information of the disc 100. As in the above-described operation example, the operation of the disc 100 that has not been subjected to the hard coat process may be terminated as it is, because it is not recommended that the disc surface be wiped off.

  Further, in each of steps S702 and S703, when the disc 100 is for recording / reproducing, the recording / reproducing device 110 checks whether the recording mode is the reproducing mode or the recording mode (steps S704, S705: reproducing mode). The recording / reproducing apparatus 110 can determine whether the user is trying to reproduce the disk 100 or to record on the disk 100 by checking whether the recording mode is the reproduction mode or the recording mode. Become.

  By the operations in steps S701 to S705 described above, “with hard coat processing, reproduction only”, “with hard coat processing, recording / playback, playback mode”, “with hardcoat processing, recording / playback, recording mode”, “ The case is divided into six cases: “no hard coat process, reproduction only”, “no hard coat process, recording / reproduction, reproduction mode” and “no hard coat process, recording / reproduction, recording mode”. In the case of “with hard coat processing and dedicated for reproduction”, TH = TH_G is set to the threshold value TH (step S706: threshold value TH = TH_G is set), and “with hard coating processing, for recording / reproduction and reproduction mode” is set. In this case, TH = TH_H is set to the threshold value TH (step S707: threshold value TH = TH_H is set), and in the case of “with hard coat processing, recording / reproducing, recording mode”, TH = TH_I is set to the threshold value TH. (Step S708: set threshold TH = TH_I), in the case of “no hard coat processing, reproduction only”, TH = TH_J is set as the threshold TH (step S709: threshold TH = TH_J is set). In the case of “none, recording / playback, playback mode”, TH = TH_K is set as the threshold TH (step S710: threshold TH = TH). Set to K), "hard-coated without, for recording, the recording mode" TH = TH_L is set to the threshold TH in the case of (Step S711: Set the threshold value TH = TH_L).

  At this time, since the recording / reproducing disc is recorded in addition to the reproduction, the influence of the contamination of the disc surface is greater, and in particular, the influence of the contamination of the disc surface during the recording of the disc 100 is greater. Thus, it is desirable that the relationship of TH_G, TH_H, TH_I, TH_J, TH_K, and TH_L satisfy TH_I <TH_H ≦ TH_G <TH_L ≦ TH_K <TH_J. As described above, the amount of contamination that may cause a problem during recording / reproduction of the disc 100 is usually about 0.3 to 0.6 mm. For example, TH_G = 0.4, TH_H = 0.4. , TH_I = 0.3, TH_J = 0.6, TH_K = 0.5, and TH_L = 0.5. It is also possible to set different values of TH_G, TH_H, TH_I, TH_J, TH_K, and TH_L depending on the type of the disc 100, and two or more values for each of TH_G, TH_H, TH_I, TH_J, TH_K, and TH_L. It is also possible to prepare a value and perform comparison with the inspection result CHK.

  In the flowchart of FIG. 2, the threshold value TH is changed depending on whether or not the hard coat process is applied to the disc 100. Further, whether the disc 100 is for reproduction only or for recording and reproduction. It is also possible to set the threshold value TH by determining whether the recording / reproducing apparatus 110 is in the reproduction mode or the recording mode.

  In the present specification, the recording / reproducing apparatus 110 capable of reproducing information recorded on the disc 100 and recording information on the disc 100 has been described as an example. It is easy for those skilled in the art to apply the present invention to a playback apparatus that can only play back information that has been recorded.

In addition, according to the above-described embodiment, in order to achieve the object of the present invention, a disk playback device for playing back information stored on an optical disk, and information recorded on the optical disk and stored on the optical disk An information supply server that communicates with at least one of a disk recording / reproducing device for reproducing information through a network,
With respect to at least one of the disk playback device and the disk recording / playback device, at least one of the disk playback device and the disk recording / playback device is configured to detect the light of the optical disk based on information read from a predetermined information area of the optical disk. Correspondence table information used when determining whether or not hard coat processing is performed on the incident surface, information read from a predetermined information area of the optical disc and hard coat on the light incident surface of the optical disc An information supply server having information supply means for supplying the correspondence table information in which a correspondence relationship with information indicating whether or not processing is performed, and at least one of the disc playback device and the disc recording / playback device And a network communication system comprising the information supply server can be provided It is.

  The present invention has an effect that it is possible to appropriately instruct the user whether or not the disk needs to be wiped, and in particular, the advantage of the disk that has been hard-coated so that the disk can be wiped is fully utilized. It has the effect that it is possible to instruct the necessity of wiping the hard-coated disc at an appropriate timing, and it can be applied to a technology related to a portable optical disc for storing information. In particular, the present invention is applicable to a technique related to an optical disc that has been subjected to a hard coat process.

It is a block diagram which shows the structural example of the recording / reproducing apparatus which concerns on embodiment of this invention. It is a flowchart which shows an example of the operation | movement in embodiment of this invention. FIG. 11 is a diagram showing an example of a display screen on which a message indicating that the disk surface needs to be wiped is displayed in the recording / reproducing apparatus according to the embodiment of the present invention. It is a figure which shows typically the necessity of the wiping of the disk in embodiment of this invention. 5 is a flowchart showing details of an operation for determining whether or not a hard coat process is performed on a disk in the embodiment of the present invention. It is a flowchart which shows the 1st example of the operation | movement which concerns on the setting of the threshold value TH used as the reference | standard for determining the necessity of the wiping of the disc in embodiment of this invention. It is a flowchart which shows the 2nd example of the operation | movement which concerns on the setting of threshold value TH used as the reference | standard for determining the necessity of the wiping of the disc in embodiment of this invention.

Explanation of symbols

100 discs (optical discs)
DESCRIPTION OF SYMBOLS 110 Recording / reproducing apparatus 111 Optical pick-up 112 Servo signal processing part 113 Signal recording circuit 114 Signal reproducing circuit 115 Media type discrimination | determination part 116 Hard-coat presence / absence discrimination | determination part 117 Threshold setting part 118 Threshold storage part 119 Dirt inspection part 120 Comparison part (Necessity of wiping off) Decision part)
121 Notification unit

Claims (2)

An optical disc for information reproduction or information recording / reproduction,
An optical disc having an information area in which information is recorded so that it is possible to determine whether or not a hard-coating process is performed on a light incident surface when recording or reproducing information. A disc playback device for playing back information stored on an optical disc, or a disc recording / playback device for recording information on an optical disc and playing back information stored on the optical disc,
An information reading unit for reading information stored in the optical disc by light;
Based on information read from a predetermined information area of the optical disc by the information reading unit, hard coat presence / absence determining means for determining whether or not a hard coat process is performed on the light incident surface of the optical disc;
A contamination inspection means for inspecting contamination existing on the light incident surface of the optical disc;
Based on the determination result by the hard coat presence / absence determination unit and the inspection result of the contamination by the contamination inspection unit, a wiping necessity determination unit that determines the necessity of wiping the light incident surface of the optical disc;
Informing means for notifying that wiping of the light incident surface of the optical disc determined by the wiping necessity determining means is necessary,
A disk reproducing apparatus or a disk recording / reproducing apparatus.

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