JP2007035209A - Optical disk recording apparatus and optical disk recording system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable specifying diversion of media ID by determining conformity for recording conditions (strategy) from the media ID and a value of the prescribed property. <P>SOLUTION: An optical disk recording apparatus has a media ID obtaining part obtaining the media ID recorded in the optical disk from the inserted optical disk, a memory in which a reference value of the prescribed property of the optical disk is stored corresponding to the Media ID of the optical disk, a means reading out the reference value of the prescribed property stored in the memory corresponding to the obtained media ID, a property value specifying part specifying the value of the prescribed property of the optical disk from the inserted optical disk, and a determining part determining conformity of the inserted optical disk for recording conditions specified by the media ID based on the specified prescribed property. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a data recording technique for an optical disc.

  Conventionally, media information including a media ID registered in an LPP (Land Pre-Pit) or a wobble (Wobble) of an optical disc is read, and data is recorded on the optical disc in accordance with recording conditions registered in advance corresponding to the media ID. Recording process was performed.

  For example, Japanese Patent Application Laid-Open No. 11-78314 describes that information for authenticity determination is printed on a recording medium and the authenticity of the recording medium is determined based on the printing information for authenticity determination. is there.

  Also, for example, in JP-A-11-66616, by providing a laminate having an ultraviolet light emitting phosphor layer and a specific fluorescence blocking layer on a substrate, fluorescence is emitted under ultraviolet light, and recorded information is recorded with the naked eye. There is a description of a recording medium that can be read. However, these recording media require separate material selection, film formation, and printing for authenticity determination on the recording medium or substrate, making the recording medium production process complicated, There are problems such as an increase in the manufacturing price of the recording medium.

For example, Japanese Patent Application Laid-Open No. 11-154353 discloses a method of using the transmittance value or reflectance value of a recording medium substrate as authentic information of the recording medium. However, these recording media judge the authenticity of the recording medium based on whether or not the transmittance value itself or the reflectance value itself of at least one of the two wavelengths of the substrate of the recording medium is the same as the predetermined value. Therefore, in order to give wavelength dependency to the transmittance of the substrate, the injection molding apparatus uses these pigments and dyes for injection molding of the substrate by adding pigments, dyes and pigments to the transparent substrate material resin. There are problems such as contamination by pigments.
JP-A-11-78314 Japanese Patent Laid-Open No. 11-66616 Japanese Patent Laid-Open No. 11-154353

  Media information registered in LLP and Wobble is certified by each media verification lab, but some commercially available recording optical discs use other media information on their own optical discs. Exists. Such an optical disc has the same media information but different optical film properties and design, and the recording conditions in the optical disc recording apparatus are also different from the genuine optical disc to which the media ID is originally assigned. Therefore, if data recording is performed based on the diverted media ID under the recording conditions corresponding to the media ID, the characteristics after recording are bad, and in the worst case, the recorded data cannot be read out. In addition, the technique as described in the above publication does not provide a sufficient solution for such a problem.

  Accordingly, an object of the present invention is to provide a data recording technique capable of coping with the diversion of a media ID in an optical disc.

  Another object of the present invention is to provide a technique for performing appropriate data recording on an optical disc.

  An optical disc recording apparatus according to a first aspect of the present invention includes a media ID acquisition unit that acquires a media ID recorded on an optical disc from an inserted optical disc, and a predetermined ID of the optical disc corresponding to the media ID of the optical disc. A memory storing characteristic reference values; and means for reading a reference value of a predetermined characteristic stored in the memory corresponding to the media ID acquired by the media ID acquisition means. As described above, by holding the media ID and the reference value of the predetermined characteristic of the optical disc in association with each other, it is possible to deal with the diversion of the media ID. Furthermore, the strategy, which is the data recording condition for the optical disc, may be adjusted based on the reference value of the predetermined characteristic and the comparison. In such a case, it is possible to perform appropriate data recording on the optical disc. .

  Further, the characteristic value specifying means for specifying the value of the predetermined characteristic of the optical disk from the inserted optical disk, the reference value of the predetermined characteristic read from the memory, and the predetermined characteristic specified by the characteristic value specifying means. Based on the value, it may further comprise a judging means for judging the suitability of the inserted optical disc with respect to the recording condition specified from the media ID. As described above, if the suitability for the recording condition (strategy) is determined from the media ID and the value of the predetermined characteristic, the diversion of the media ID can be specified.

  Further, the predetermined characteristic of the optical disk may be a characteristic related to the return light from the optical disk of the laser light irradiated on the optical disk. For example, reflectance and transmittance.

  Furthermore, the predetermined characteristic of the optical disk may be a characteristic correlated with the recording characteristic of the optical disk.

  Further, the memory may store a reference value of a predetermined characteristic at one or more predetermined positions (for example, the inner circumference, the outer circumference, or both of the optical disc) on the optical disc. In that case, the characteristic value specifying means specifies a predetermined characteristic value at one or more predetermined positions on the inserted optical disc, and the judging means specifies the reference value of the predetermined characteristic at the corresponding position. The predetermined characteristic value is compared.

  The characteristic value specifying means may specify predetermined characteristic values at a plurality of predetermined positions on the inserted optical disk. In this case, the determination means performs an operation using the predetermined characteristic values at a plurality of predetermined positions specified by the characteristic value specifying means, and the calculation result and a reference of the predetermined characteristic read from the memory Compare the value. For example, the difference or change rate between the inner and outer circumferences of the optical disk is calculated. This is because when the characteristic value greatly changes at a plurality of positions such as the inner periphery and the outer periphery, it is often not a genuine product.

  Further, the characteristic value specifying means may specify a predetermined characteristic value in each recording layer in the inserted optical disk. In this case, the determining means calculates the characteristic change amount from the predetermined characteristic value in each recording layer specified by the specific value specifying means, and calculates the calculation result and the reference value of the predetermined characteristic read from the memory. Compare. In this way, it is possible to deal with multilayer optical disks.

  Furthermore, a means for determining a process for the inserted optical disk may be further provided based on the result of the suitability judgment by the judging means. On the other hand, an instruction from the user may be accepted and the operation may be performed as it is.

  In addition, when the determination means described above determines that the inserted optical disk is incompatible, a data recording process in which the process for the optical disk is performed at a speed lower than a predetermined recording speed, and the data recording process is stopped. Any of the normal data recording processing may be used.

  Further, the memory may store data relating to recording conditions for the optical disc corresponding to the media ID of the optical disc. At this time, if the determination unit determines that the inserted optical disk is suitable, the process for the optical disk is a data recording process performed according to the data relating to the recording conditions stored in the memory corresponding to the acquired media ID. .

  Moreover, you may make it further contain the means to display the suitability determination result by a determination means on a display apparatus.

  Further, the information processing apparatus may further include means for recording at least one of the compatibility determination result by the determination unit and the information regarding the processing for the inserted optical disk on the storage device of the optical disk recording device or the inserted optical disk. This is because the data is referred to when a problem such as data cannot be read later occurs.

  An optical disc recording apparatus according to a second aspect of the present invention includes a media ID acquisition unit that acquires a media ID recorded on an optical disc from an inserted optical disc, and a predetermined ID of the optical disc corresponding to the media ID of the optical disc. A memory in which a reference value of the characteristic is stored, a means for reading out a reference value of a predetermined characteristic stored in the memory corresponding to the media ID acquired by the media ID acquisition means, and an optical disk Based on the media ID based on the characteristic value specifying means for specifying the value of the predetermined characteristic, the reference value of the predetermined characteristic read from the memory, and the value of the predetermined characteristic specified by the characteristic value specifying means Is based on the determination means for determining the suitability of the inserted optical disc with respect to the recording conditions to be recorded, and the conformity determination result by the determination means And means for displaying the broadcast on a display device. As described above, by determining the suitability for the recording condition (strategy) from the media ID and the value of the predetermined characteristic, the diversion of the media ID can be specified, and the user can be notified.

  Further, the information based on the result of the suitability determination by the determining means may include information about whether or not the inserted optical disk is a genuine product. That is, the media ID recorded on the optical disc is acquired from the inserted optical disc, and information about whether the media ID acquired by the optical disc is an authentic product that should be recorded is displayed on the display device. is there. Thus, for example, when it is determined that there is no compatibility, the media ID may be regarded as being misrepresented and displayed.

  Further, the information based on the compatibility determination result by the determination means may include information on the presence / absence of compatibility of the inserted optical disk. For example, the user may be notified that appropriate data recording is impossible.

  Further, when the determination unit determines that the inserted optical disc is incompatible, information based on the result of the compatibility determination by the determination unit may be information that prompts the user to give an instruction regarding a procedure for the inserted optical disc. For example, options such as writing as it is, writing data at a reduced speed, or stopping data writing may be shown to prompt the user to select.

  Further, the information processing apparatus may further include a unit that receives an instruction regarding a procedure for the inserted optical disc from a user and performs an operation corresponding to the instruction. The process to be automatically executed can be specified and executed as it is, or the process to be automatically executed can be specified and executed after confirmation from the user, or all options are presented to the user. It may be executed after receiving the instruction.

  There are a plurality of embodiments for realizing the configuration as described above, and specific examples are shown below, but the present invention is not limited thereto.

  According to the present invention, it is possible to deal with the diversion of the media ID in the optical disc.

  In addition, according to another aspect of the present invention, appropriate data recording can be performed on an optical disc.

[First Embodiment]
FIG. 1 shows a functional block diagram of a system according to the first embodiment of the present invention. The system according to the present embodiment includes an optical disc recording / reproducing apparatus 1 and a personal computer 3. In FIG. 1, the optical disc recording / reproducing apparatus 1 and the personal computer 3 are shown separately, but the optical disc recording / reproducing apparatus 1 may be integrated with the personal computer 3.

  The optical disc recording / reproducing apparatus 1 includes a memory 11, a controller 12, an interface unit (I / F) 17 that is an interface with the personal computer 3, a signal processing unit 13, a servo control unit 16, a pickup unit 14, A laser diode (LD) driver 15 and a rotation control unit and a motor of the optical disk 5 (not shown) are included. The controller 12 is connected to the memory 11, the signal processing unit 13, the I / F 17, the servo control unit 16, the LD driver, a rotation control unit (not shown), and the like. The signal processing unit 13 is connected to the PD 146, the controller 12, and the like. The servo control unit 16 is connected to the controller 12 and the pickup unit 14. The LD driver 15 is connected to the controller 12 and the LD 145. The controller 12 is connected to the personal computer 3 via the I / F 17.

  Further, the controller 12 includes a characteristic value calculation unit 121, a suitability determination unit 122, and a strategy determination unit 123 as processing units related to the present embodiment. Further, the signal processing unit 13 includes a media ID acquisition unit 131 and a characteristic value detection unit 132 as processing units related to the present embodiment. Although not shown in the figure, data for performing data encoding processing for writing to the optical disc 5 and data decoding processing for decoding data read from the optical disc 5 in the signal processing unit 13 or separately from the signal processing unit 13 A modulation circuit is provided. The pickup unit 14 includes an objective lens 141, a beam splitter 142, a detection lens 143, a collimator lens 144, a laser diode (LD) 145, and a photodetector (PD) 146. In the pickup unit 14, an actuator (not shown) operates according to the control of the servo control unit 16, and focusing and tracking are performed.

  The personal computer 3 includes a data recording processing unit 33 for exchanging data with the optical disc recording / reproducing apparatus 1 to perform data recording processing on the optical disc 5 and the like, a display unit 31 that is a display, as a part related to the present embodiment. And an input unit 32 such as a keyboard and a mouse.

  When reproducing data recorded on the optical disc 5, the LD driver 15 drives the LD 145 to output laser light in accordance with an instruction from the controller 12. The laser light is irradiated onto the optical disk 5 through the collimating lens 144, the beam splitter 142, and the objective lens 141. The reflected light from the optical disk 5 is input to the PD 146 via the objective lens 141, the beam splitter 142, and the detection lens 143. The PD 146 converts the reflected light from the optical disk 5 into an electrical signal and outputs it to the signal processing unit 13 and the like. The signal processing unit 13 or the like performs a predetermined decoding process on the output signal, and outputs the decoded data to a data reproduction unit (not shown) in the personal computer 3 via the controller 12 and the I / F 17. For example, the data reproduction unit displays the reproduction data on the display unit 31. Data reproduction is not the main point of the present embodiment and will not be described further.

  On the other hand, when data is recorded on the optical disc 5, processing as described with reference to FIGS. 2 to 6 is performed. For example, when the user of the personal computer 3 gives an instruction to record predetermined data on the optical disc 5 from the input unit 32, the data recording processing unit 33 sends the data recording instruction via the I / F 17 of the optical disc recording / reproducing apparatus 1. Output to the controller 12. In response to the data recording instruction, the controller 12 outputs a predetermined instruction to the LD driver 15 and causes the LD 145 to output a laser beam having a reproduction intensity. Further, the controller 12 controls the pickup unit 14 via the servo control unit 16 so as to irradiate a predetermined position of the optical disc 5 with laser light. The laser beam output from the LD 145 is applied to the optical disc 5 through the collimator lens 144, the beam splitter 142, and the objective lens 141.

  The reflected light from the optical disk 5 is input to the PD 146 via the objective lens 141, the beam splitter 142, and the detection lens 143. The PD 146 converts the reflected light into an electrical signal and outputs the electrical signal to the signal processing unit 13.

  The media ID acquisition unit 131 of the signal processing unit 13 acquires the media ID recorded on the optical disc 5 from the signal from the PD 146 (step S1). A media ID is acquired from a signal about LPP or wobble. Since this process is not different from the conventional process, it will not be described further. The acquired media ID is output to the controller 12 and recorded in the memory 11, for example. In addition, the compatibility determination unit 122 of the controller 12 reads the characteristic reference value corresponding to the acquired media ID from the memory 11 (step S3).

  The memory 11 stores a data table as shown in FIG. In the example in FIG. 3A, strategy information including a power condition and a pulse condition and a characteristic reference value are registered corresponding to the media ID. Note that default strategy information is also registered.

  Next, the characteristic value detection unit 132 of the signal processing unit 13 specifies the characteristic value of the optical disc 5 from the signal from the PD 146 (step S5). The characteristic value to be specified here is a characteristic value correlated with the recording characteristic of the optical disc. Specifically, the reflectance, the transmittance, the occurrence state of defects such as spikes in the optical disc, the degree of warpage, and the mechanical characteristics such as the acceleration of the optical disc. The characteristic value is mainly related to the return light from the optical disk 5. In addition, for example, the characteristic values of a plurality of locations may be specified in addition to the configuration for specifying the characteristic values of one predetermined location (inner circumference, middle circumference, outer circumference, etc.) of the optical disc 5. Here, the characteristic values at the inner periphery and the outer periphery are specified. The specified characteristic value is output to the controller 12.

  Then, the characteristic value calculation unit 121 of the controller 12 performs a predetermined calculation on the characteristic value received from the characteristic value detection unit 132 of the signal processing unit 13 and outputs the calculation processing result to the suitability determination unit 122 ( Step S6). For example, the difference between the inner peripheral characteristic value and the outer peripheral characteristic value is calculated. It may be the rate of change.

  FIG. 4 shows a change in the characteristic value of a specific optical disc as a curve A, and a change in the characteristic value of another optical disc as a curve B. As described above, in the example of FIG. 4, the characteristic value in the middle circumference of a specific optical disc is close to the characteristic value in the middle circumference of another optical disc. However, the characteristic value of a specific optical disc does not change greatly between the inner circumference, the middle circumference, and the outer circumference, but the characteristic value of another optical disc changes greatly between the inner circumference, the middle circumference, and the outer circumference. Normally, optical discs having the same media ID have the same characteristic value with some variation, but the change tendency (change amount or change rate, etc.) in the optical disc is the same. However, optical discs that use other companies' media IDs often exhibit different characteristic values, change amounts, or change rates than genuine optical discs. When the characteristic value of the genuine optical disk is represented by a curve A, if the media ID is the same and a characteristic value similar to the curve A is specified, it can be determined that the optical disk is a genuine optical disk. On the other hand, if an optical disk that uses another company's media ID and a characteristic value such as curve B is specified, for example, the difference in the characteristic value between the inner and outer circumferences is significantly different from the genuine optical disk. The diversion of the media ID can be detected. Note that the use of the media ID can be detected with high accuracy by using the characteristic values for a plurality of positions as described above. In the example of FIG. 4 as well, it is possible to determine that another optical disc is also an authentic optical disc by comparing only the middle circumference characteristic value. However, if the characteristic value at another position is used, the diversion can be detected.

  Therefore, the suitability determination unit 122 compares the characteristic reference value read in step S3 with the calculated characteristic value calculated in step S6, and determines whether the calculated characteristic value matches the characteristic reference value (step S7). In the case where the difference between the characteristic values of the inner periphery and the outer periphery is to be compared, for example, it is determined whether it is equal to or less than the characteristic reference value. As shown in FIG. 5, if the optical discs 5 to be processed are the optical discs A and B, the difference between the characteristic values is equal to or smaller than the characteristic reference value α, so that the optical discs 5 to F are judged to be suitable. Since the difference in values exceeds the characteristic reference value α, it is determined as nonconforming. However, depending on the nature of the characteristic value, the suitability may be determined under other conditions rather than “below”.

  When the compatibility determination unit 122 determines that the optical disk 5 to be processed is compatible, the compatibility determination unit 122 outputs a compatibility signal to the data recording processing unit 33 of the personal computer 3 via the I / F 17. (Step S9). The data recording processing unit 33 receives the matching signal and displays on the display unit 31 that data can be recorded on the optical disc 5 (step S11). As a result, the user can grasp that the prepared optical disk 5 is normal and data recording is possible as usual. If normal, step S11 may be skipped.

  Further, the strategy determining unit 123 reads out strategy information (power condition, pulse condition, etc.) from the data table in the memory 11 using the media ID of the optical disc 5, and separately records data encoded by the signal processing unit 13 or the like. According to the read strategy information, it is converted into a recording pulse and output to the LD driver 15 (step S13). The recording data is data output from the data recording processing unit 33 via the I / F 17.

  The LD driver 15 drives the LD 145 according to the recording pulse from the controller 12. The laser beam output from the LD 145 is applied to a predetermined position of the optical disk 5 that rotates at a constant linear speed or a constant rotational speed by the controller 12 via the collimator lens 144, the beam splitter 142, and the objective lens 141. As a result, a recording pattern composed of pits and space strings corresponding to the recording data is formed on the optical disc 5.

  On the other hand, if it is determined in step S7 that the optical disk 5 to be processed is not compatible, the process proceeds to the process in FIG.

  When the compatibility determination unit 122 determines that the optical disk 5 to be processed is not compatible, the compatibility determination unit 122 outputs a non-conformance signal to the data recording processing unit 33 of the personal computer 3 via the I / F 17. (Step S15). The data recording processing unit 33 receives the nonconformance signal and displays a warning on the display unit 31 that the media ID of the optical disk 5 and its characteristics are incompatible or that the media ID is a counterfeit (or fake product). This is performed (step S17). Thereby, the user can recognize that a problem may occur in the prepared optical disk 5. Further, for example, if a display such as “There is a possibility that it is not an authentic product of XX (manufacturer name) because of different characteristics” is displayed, it is possible to motivate the user to purchase an authentic product.

  In the following, processing is divided into a mode in which the user determines what to do when it is determined to be nonconforming, and a mode in which it is automatically determined. If the mode to be determined by the user is set (step S19: Yes route), the data recording processing unit 33 displays on the display unit 31 an instruction for prompting the user about a countermeasure (step S19). S21). For example, the user is presented with options such as (1) no data recording, (2) data recording at a reduced recording speed, and (3) normal recording. The data recording processing unit 33 receives an instruction from the input unit 32 by the user, and outputs data specifying the instruction to the controller 12 via the I / F 17. When the controller 12 receives the data specifying the user's instruction, the controller 12 performs a corresponding process according to the user's instruction (step S23). For example, (1) when an instruction not to perform data recording is input, the controller 12 ejects the optical disc 5 from the optical disc recording / reproducing apparatus 1. Further, (2) when an instruction to perform data recording at a reduced recording speed is input, the controller 12 performs control so as to decrease the recording speed. In addition, the strategy determination unit 123 reads default strategy information from the data table of the memory 11, and performs data recording processing according to the strategy information. Strategy information registered corresponding to the media ID may be used, but adjustment is necessary because it is determined that the strategy information is incompatible. (3) When an instruction to record as usual is input, the same processing as step S13 is performed. In the case of (3), the default strategy information may be read from the data table of the memory 11 without reducing the recording speed, and the data recording process may be performed according to the strategy information.

  On the other hand, if the mode is an automatic determination mode (step S19: No route), the controller 12 automatically specifies the corresponding processing because the processing to be performed when it is determined to be incompatible is defined in advance. (Step S27), and the corresponding processing is performed (Step S29). For example, if there is a policy not to perform data recording, a corresponding process of ejecting the optical disc 5 is defined, and the optical disc 5 is ejected from the optical disc recording / reproducing process 1. If there is a policy of recording data at a lower recording speed, control is performed to lower the recording speed. In addition, the strategy determination unit 123 reads default strategy information from the data table of the memory 11, and performs data recording processing according to the strategy information. Note that the content of the handling process may also be displayed on the display unit 32. Further, when the automatic determination mode is performed, steps S15 and S17 may be skipped.

  After step S23 or step S29, the controller 12 records data relating to the nonconformity determination and the countermeasures in the memory 11 (step S25). For example, the media ID, the nonconformity determination identification code, and the countermeasure identification code are recorded. When data recording is performed despite the nonconformity determination, data relating to the nonconformity determination and a countermeasure may be recorded on the optical disc 5. The data relating to the countermeasure may include strategy information at the time when data recording is performed. In this way, it is possible to refer to it when a problem occurs such that data cannot be read later. The recording may be performed not on the memory 11 but on the hard disk of the personal computer 3 in cooperation with the data recording processing unit 33.

  In step S13, the code indicating the suitability determination and the media ID may be recorded in the memory 11, or the code indicating the suitability determination may be recorded on the optical disc 5.

  Then, the processing returns to the processing flow of FIG.

  By performing such processing, it is possible to accurately determine whether the optical disc is an authentic optical disc or an optical disc that uses the media ID, and it is possible to appropriately deal with the optical disc that uses the media ID. It becomes like this. Further, it is not necessary to perform a new test writing for authenticity determination.

[Embodiment 2]
In the first embodiment, the optical disk recording / reproducing apparatus used together with the personal computer 3 has been described. In the second embodiment, as shown in FIG. 7, the I / F 17a of the optical disk recording / reproducing apparatus includes, for example, It is connected to a display device 6 that is a television receiver, and communicates with an input device 7 that is a remote controller, for example.

  In such a case, the controller 12 has the function of the data recording processing unit 33 of FIG. That is, display is performed for the user on the display device 6, or when the display device is provided in the optical disc recording / reproducing device, display is performed on the display device. Further, if the input device 7 is provided with a display device and bidirectional communication with the input device 7 is possible, the display device of the input device 7 may be displayed.

  If the optical disc recording / reproducing apparatus is provided with an input device such as a display device and buttons, the same processing as in the first embodiment can be performed without the display device 6 and the input device 7.

[Other embodiments]
In the example described above, the difference between the characteristic values of the inner and outer circumferences is calculated, but the characteristic values at more positions are specified, for example, the average value, median value, and other statistics are calculated. Then, it may be compared with the characteristic reference value. In addition, the suitability may be determined based on a characteristic value for one position where a difference is particularly likely to occur.

  Further, in the example described above, the characteristic value calculation unit 121 calculates one calculated characteristic value from the two characteristic values specified by the characteristic value detection unit 132, but without using the characteristic calculation unit 121, Matching using the inner and outer peripheral characteristic values specified by the characteristic value detecting unit 132 and the inner and outer peripheral characteristic reference values A and B as shown in FIG. The sex determination unit 122 may determine suitability. That is, the inner circumference characteristic value and the inner circumference characteristic reference value A are compared, and the outer circumference characteristic value and the outer circumference characteristic reference value B are compared. For example, when the inner peripheral characteristic value is equal to or smaller than the inner peripheral characteristic reference value A and the outer peripheral characteristic value is equal to or smaller than the outer peripheral characteristic reference value B, the optical disk 5 to be processed is determined to be compatible. In other cases, it is judged that there is no conformity.

  Note that not only a single-layer optical disc but also a multi-layer optical disc can be handled. For example, the characteristic values are specified as the first layer instead of the inner periphery and the second layer instead of the outer periphery, and FIG. It may be compared with a characteristic reference value as shown in FIG. The difference between the characteristic values of the first layer and the second layer may be calculated and compared with the corresponding characteristic reference value. Furthermore, the characteristic values of the inner and outer circumferences of the first layer and the characteristic values of the inner and outer circumferences of the second layer may be handled in a composite manner.

  Further, not only the determination of compatibility and non-compatibility, but also the level of compatibility of the optical disc 5 may be specified as shown in FIG. For example, the calculated characteristic value calculated by the characteristic value calculation unit 121 is compared with the level 1 characteristic reference value. If the calculated characteristic value is equal to or lower than the level 1 characteristic reference value, it is determined to be suitable, and the level 1 characteristic reference is determined. If it exceeds the value but below the characteristic reference value of level 2, it may be determined as semi-conforming, and if it exceeds the characteristic reference value of level 2, it may be determined as non-conforming. In the case of semi-conformance, it may be left to the user, and the strategy information stored in the data table of the memory 11 is also added to the strategy information in the case of semi-conformance and used when recording data. Alternatively, for example, an adjustment coefficient may be added and the adjustment coefficient may be used at the time of actual data recording, or adjustment may be performed using the adjustment coefficient.

  Although the embodiment of the present invention has been described above, the present invention is not limited to the embodiment described above. For example, the functional block diagram of FIG. 1 is shown for explanation of functions, and may not correspond to an actual part or program.

  Further, the data tables (FIGS. 3A to 3C) stored in the memory 11 are not used only for the above-described purposes. For example, in the case of an optical disc having a plurality of recording layers, the characteristic value of the first layer is specified, and the strategy information such as the second layer is adjusted based on the comparison result with the characteristic reference value in the data table. May be.

It is a functional block diagram of a system concerning a 1st embodiment of the present invention. It is a figure which shows the processing flow which concerns on the 1st Embodiment of this invention. (A) thru | or (c) is a figure which shows the example of the data table stored in memory. It is a graph showing the change of a characteristic value. It is a graph for demonstrating the compatibility determination of an optical disk. It is a figure which shows the processing flow which concerns on the 1st Embodiment of this invention. It is a functional block diagram of the system which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical disk recording / reproducing apparatus 3 Personal computer 5 Optical disk
11 Memory 12 Controller 13 Signal Processing Unit 14 Pickup Unit 15 LD Driver 16 Servo Control Unit 17 I / F
Reference Signs List 31 Display Unit 32 Input Unit 33 Data Recording Processing Unit 121 Characteristic Value Calculation Unit 122 Suitability Judgment Unit 123 Strategy Determination Unit 131 Media ID Acquisition Unit 132 Characteristic Value Detection Unit 141 Objective Lens 142 Beam Splitter
143 Detection lens 144 Collimate lens 145 LD 146 PD

Claims (17)

Media ID acquisition means for acquiring the media ID recorded on the optical disc from the inserted optical disc;
A memory storing a reference value of a predetermined characteristic of the optical disc corresponding to the media ID of the optical disc;
Means for reading a reference value of a predetermined characteristic stored in the memory corresponding to the media ID acquired by the media ID acquisition means;
An optical disc recording apparatus having Characteristic value specifying means for specifying a value of a predetermined characteristic of the optical disc from the inserted optical disc;
Based on the reference value of the predetermined characteristic read from the memory and the value of the predetermined characteristic specified by the characteristic value specifying means, the inserted for the recording condition specified from the media ID Determining means for determining the suitability of the optical disc;
The optical disk recording apparatus according to claim 1, further comprising:   3. The optical disk recording apparatus according to claim 2, wherein the predetermined characteristic of the optical disk is a characteristic relating to a return light from the optical disk of a laser beam irradiated on the optical disk. The optical disk recording apparatus according to claim 2, wherein the predetermined characteristic of the optical disk is a characteristic correlated with a recording characteristic of the optical disk. The memory stores a reference value of a predetermined characteristic at one or more predetermined positions on the optical disc;
The characteristic value specifying means specifies a value of a predetermined characteristic at the predetermined position or positions on the inserted optical disc;
The optical disc recording apparatus according to claim 2, wherein the determination unit compares a reference value of the predetermined characteristic with a specified value of the predetermined characteristic at a corresponding position. The characteristic value specifying means specifies predetermined characteristic values at a plurality of predetermined positions on the inserted optical disc;
The determination means performs an operation using the predetermined characteristic values at the plurality of predetermined positions specified by the characteristic value specifying means, and the calculation result and the predetermined characteristic read from the memory The optical disc recording apparatus according to claim 2, wherein the reference value is compared with the reference value. The characteristic value specifying means specifies a value of a predetermined characteristic in each recording layer in the inserted optical disc;
The determination unit calculates a characteristic change amount from a predetermined characteristic value in each recording layer specified by the specific value specifying unit, and the calculation result and a reference value of the predetermined characteristic read from the memory The optical disc recording apparatus according to claim 2. The optical disk recording apparatus according to claim 2, further comprising: means for determining a process for the inserted optical disk based on a result of compatibility determination by the determination means.   If the determination means determines that the inserted optical disk is incompatible, the data recording process in which the process for the optical disk is performed at a speed lower than a predetermined recording speed, the stop of the data recording process, and normal data 9. The optical disk recording apparatus according to claim 8, wherein the optical disk recording apparatus is one of recording processes. The memory stores data relating to recording conditions for the optical disc corresponding to the media ID of the optical disc;
When the determination unit determines that the inserted optical disk is suitable, a data recording process in which processing for the optical disk is performed in accordance with data relating to the recording condition stored in the memory corresponding to the acquired media ID 9. The optical disk recording apparatus according to claim 8, wherein The optical disk recording apparatus according to claim 2, further comprising: means for displaying a compatibility determination result by the determination unit on a display device. The optical disk recording apparatus according to claim 8, further comprising: a recording unit that records at least one of a compatibility determination result by the determination unit and information regarding processing on the inserted optical disk on the storage device or the inserted optical disk. Media ID acquisition means for acquiring a media ID recorded on the optical disc from the inserted optical disc;
A memory storing a reference value of a predetermined characteristic of the optical disc corresponding to the media ID of the optical disc;
Means for reading a reference value of a predetermined characteristic stored in the memory corresponding to the media ID acquired by the media ID acquisition means;
Characteristic value specifying means for specifying a value of a predetermined characteristic of the optical disc from the inserted optical disc;
Based on the reference value of the predetermined characteristic read from the memory and the value of the predetermined characteristic specified by the characteristic value specifying means, the inserted for the recording condition specified from the media ID Determining means for determining the suitability of the optical disc;
Means for displaying on the display device information based on the suitability judgment result by the judging means;
An optical disk recording system comprising: 14. The optical disc recording system according to claim 13, wherein the information based on the suitability judgment result by the judging means includes information on whether or not the inserted optical disc is a genuine product.   14. The optical disk recording system according to claim 13, wherein the information based on the compatibility determination result by the determination means includes information about the compatibility of the inserted optical disk.   The information based on the compatibility determination result by the determination unit when the determination unit determines that the inserted optical disc is incompatible is information for prompting a user to give an instruction regarding a procedure for the inserted optical disc. 13. The optical disk recording system according to 13. The optical disk recording system according to claim 16, further comprising means for receiving an instruction regarding a treatment for the inserted optical disk from a user and performing an operation corresponding to the instruction.

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