JP4281140B2 - Media compatibility determination method and apparatus applied to optical disc apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a media compatibility determination method and apparatus applied to an optical disc apparatus.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in an optical disc apparatus capable of recording information on an optical disc, writing tends to fail depending on the medium, and the compatibility of writing between the optical disc apparatus and the medium has been a problem. Therefore, in the manual of the optical disk device, a medium having good compatibility with the optical disk device is recommended. In order to solve this problem, as disclosed in Japanese Patent Laid-Open No. 8-221176, in order to ensure the reliability of recorded information and improve the writing performance, it is obtained from a wobble signal of a track. There has been proposed an optical information recording / reproducing apparatus configured to use CRC (Cyclic Redundancy Check: ID part error detection code) of information to be obtained.
[0003]
[Problems to be solved by the invention]
However, in the writing by the conventional optical disk device as described above, the user must purchase the writing medium after confirming the recommended media in the manual of the device. If you purchase media that is not compatible with the media, it is possible that the media will fail to write. There is also a possibility that the recommended media will be discontinued due to media model changes. In such a case, in order to find a medium that is compatible with the optical disc apparatus, it is necessary to find a compatible medium by writing on several types of media. For this reason, it takes a lot of time and labor to judge whether the compatibility is good or bad, and if the writing fails, the media must be discarded. In addition, the optical information recording / reproducing apparatus disclosed in the above publication is intended to solve the problem in actual writing, and thus cannot solve the above problem.
[0004]
The present invention has been made in order to solve the above-described problems, so that the compatibility level can be determined at the test writing stage before writing to the medium so that the user can check the compatibility level. Accordingly, an object of the present invention is to provide a media compatibility determination method and apparatus applied to an optical disc apparatus that can reduce failure in writing to the medium.
[0007]
[Means for Solving the Problems]
The invention described in 請 Motomeko 1, in media compatibility confirmation method applied to an optical disk apparatus for recording and reproducing information by irradiating a light beam to the recording surface of the recordable optical disc, compatibility writing a good media The light reflectance is stored, and at the time of compatibility determination for the medium to be subjected to compatibility determination, the value from the lower limit value to the upper limit value of the light reflectance of the medium having good compatibility is divided into a predetermined number of steps, and the compatibility determination is performed. By performing multiple readings on the test writing portion of the media to be subjected to the calculation, obtaining an average value of the light reflectance thereof, and determining which of the stages corresponds to the average value, The degree of compatibility between the medium and the optical disc apparatus is discriminated.
[0008]
In the above method, depending on where the average value of the light reflectance of the medium subjected to compatibility determination is located from the lower limit value to the upper limit value of the light reflectance of the compatible medium, the medium is Since it is determined to what extent it is suitable for the optical disk apparatus, the user of the apparatus can specifically know the degree of compatibility, and more reliably reduce failures in writing to the medium.
[0009]
The invention according to claim 2 is a media compatibility determination method applied to the optical disc apparatus according to claim 1, and when compatibility determination is performed, the compatibility determination is performed together with the result of compatibility determination. When the compatibility code of another medium is determined, the manufacturer code is read from the media to determine whether the manufacturer code is already stored. If stored, the compatibility determination result corresponding to the stored manufacturer code is used as the compatibility determination result of the media. If the manufacturer code is not stored, the compatibility determination for the media is performed. It is.
[0010]
In the above method, for the media for which compatibility determination has been made once, the manufacturer code is stored together with the compatibility determination result, and when the compatibility determination of media of the same manufacturer is performed next time, the previous determination result is used, so the same manufacturer In the case of determining the compatibility of the media, the processing becomes simple and the compatibility determination can be performed quickly.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
A media compatibility determination method according to an embodiment of the present invention and an optical disc apparatus to which the method is applied will be described below with reference to the drawings. A schematic configuration of an optical disc apparatus according to the present invention is shown in a block diagram of FIG. The optical disc apparatus 1 includes a data control unit 2 that controls data to be written on the medium, a spindle motor 3 for rotating the medium when information is written to the medium or information is read from the medium, and a lens unit of the optical pickup device. And a drive control unit 5 that controls the operation of the actuator 4 and the like for driving. An interface control unit 7 for inputting / outputting various signals to / from the personal computer 6 is connected to the data control unit 2. Further, a data recording unit (light reflectance detection means) 8 for controlling the optical pickup device for recording and writing on the medium is connected via a data modulation unit 9 and a data processing unit 10. The data recording unit 8 controls the operation of the light emitting unit 12 and the light receiving unit 13 of the optical pickup device according to information to be written.
[0014]
Further, the data control unit 2 includes an internal buffer 15 for temporarily storing write data sent from the personal computer 6 via the interface control unit 7, and a stage for media compatibility determination described later. A counter 16 for counting values is connected. The data recording unit 8 is connected to an A / D conversion unit (light reflectance detection means) 17 for measuring the light reflectance of the medium surface. The A / D conversion unit 17 is connected to the measured light reflectance. A non-volatile memory (storage means) 18 for storing the data is connected. This memory 18 is also connected to the data control unit 2.
[0015]
Next, a media compatibility determination method by the optical disc apparatus 1 will be described with reference to FIG. This media compatibility determination method is based on the premise that the optical reflectance is measured when writing on a medium having good compatibility with the optical disc apparatus 1 and the optimum value is stored in the memory 18. When a medium to be written is set in the optical disc apparatus 1 and trial writing (writing test) is selected by the user in the personal computer 6, writing to the test area of the medium is performed based on a command from the main control unit of the personal computer 6 Is started (S1). After the trial writing, information is read out a plurality of times from the area where the trial writing has been performed (S2), and the reflectance of the media surface is measured a plurality of times. Next, the light reflectance value of the compatible medium stored in advance is read from the memory 18 (S3), the optimum value is set (S4), and the upper limit value and the lower limit value are set from the optimum value. (S5). Then, a step value for displaying the compatibility of the media step by step is set (S6). This step value is a value of light reflectivity representing each block when the value between the lower limit value and the upper limit value of the light reflectivity of a compatible medium is equally divided into 10 blocks. .
[0016]
Next, an average value of the light reflectance when information is read out from the test writing area a plurality of times in S2 is calculated (S7), and the read average value is compared with the above-described step value (S8). The read average value is compared in order from the smallest step value of the block, and if the read average value exceeds the step value, the counter 16 is incremented (S9). This count is stopped at the block where the read average value is equal to or lower than the step value, and the count number at that time is output to the personal computer 6 as the compatibility determination result and displayed (S10). As a result, a numerical value from 1 to 10 is displayed on the personal computer 6, but the block including the optimum value of the light reflectance for writing is the fifth block that is intermediate between the lower limit value and the upper limit value. Therefore, if the displayed value is “5”, the user can determine that the compatibility is optimal. Therefore, the closer the displayed numerical value is to “5”, the better the compatibility with the optical disk apparatus 1 is, and the more the displayed numerical value is away from “5”, the worse the compatibility with the optical disk apparatus 1 is. Can be grasped.
[0017]
A media compatibility determination method according to the second embodiment of the present invention will be described with reference to FIG. In general, the compatibility of a medium with an optical disk device is determined by the manufacturer of the medium. In other words, it can be said that there is a compatibility between the optical disk device and the media manufacturer. Focusing on this point, the compatibility determination method according to the second embodiment stores the manufacturer code in the memory 18 together with the compatibility determination result for the media for which compatibility has been determined once. A new compatibility determination is not performed, and a past compatibility determination result is used. This medium compatibility determination method is also based on the premise that the optical reflectance is measured when writing on a medium having good compatibility with the optical disc apparatus 1 and the optimum value is stored in the memory 18. This is the same as in the first embodiment.
[0018]
When the medium to be written is set in the optical disc apparatus 1, the manufacturer code recorded in the lead-in area of the medium is read (S11), and whether or not this manufacturer code is already stored in the memory 18 is checked. Check (S12). If the manufacturer code is stored in the memory 18 (YES in S12), the count number corresponding to the manufacturer code is read from the memory 18 (S24), and the count number is output to the personal computer 6 as the compatibility determination result. Are displayed (S23).
[0019]
When the manufacturer code read from the medium is not stored in the memory 18 (NO in S12), a series of processes for determining the compatibility of the media is performed as in the first embodiment (S13 to S21). However, when the count for the read average value is completed, the count number is stored in the memory 18 together with the manufacturer code of the disc (S22). Thereafter, the count number is output to the personal computer 6 as a compatibility determination result and displayed (S23).
[0020]
As described above, according to the medium compatibility determination method and the optical disc apparatus 1 of the present embodiment, when the test writing is completed, the compatibility of the media with respect to the optical disc apparatus 1 is indicated, and thus writing to the data recording area of the media is performed. Before performing, it is possible to know the compatibility between the medium and the optical disk device, and to reduce failures in writing to the medium. Furthermore, since the compatibility determination result of the media is indicated by a numerical value indicating the degree of compatibility, the user can easily know the success rate of writing to the media and determine whether or not to perform the writing. Can be useful. In the second embodiment, when a manufacturer's medium that has been subjected to compatibility determination in the past is set in the optical disc apparatus 1, the past compatibility determination result is displayed and a new compatibility determination is performed. Therefore, the processing for displaying the compatibility degree in that case is simplified, and the time required for displaying the compatibility degree can be shortened.
[0021]
The present invention is not limited to the configuration of the above embodiment, and various modifications can be made. For example, in the above-described embodiment, the compatibility determination is performed depending on where the average value of the light reflectance of the medium subjected to compatibility determination is located from the lower limit value to the upper limit value of the light reflectance of the compatible medium. However, the method is not limited to this compatibility determination method, and the difference between the average value of the light reflectance of the medium subjected to the compatibility determination and the optimum value of the light reflectance of the compatible medium. The compatibility may be determined based on the above. In this case, the data control unit 2 shown in FIG. 1 functions as a light reflectance difference calculating unit and a compatibility determining unit as defined in claim 4.
[0022]
The present invention is not limited to the configuration of the above embodiment, and various modifications can be made. For example, in the above embodiment, the optimum value of the light reflectance of the compatible medium is stored in the memory 18, but the lower limit value and the upper limit value are stored together with the optimum value. May be. In the above embodiment, after determining the compatibility of the media, the degree of compatibility is displayed as a numerical value. However, the present invention is not limited to this. Another may be shown. Furthermore, in the said embodiment, although it is supposed that the degree of compatibility is displayed in ten steps, the number of steps is not limited to this. In the above-described embodiment, the average value of the light reflectance in a plurality of readings is calculated after calculating the step value. However, the reading average value may be calculated before calculating the step value. Absent.
[0023]
【The invention's effect】
As described above, according to the invention described in claim 1 or claim 4, it is possible to know the compatibility between the medium and the apparatus at the end of the test writing before writing to the data recording area of the medium. Accordingly, compatibility with the optical disc apparatus can be easily known without actually writing to the recording area of the medium. Thereby, the failure of writing to the medium can be reduced, and the medium is not wasted.
[0024]
According to the second aspect of the present invention, even if the medium is compatible with the optical disc apparatus, it is possible to know in detail how much the compatibility is, and the user can determine the degree of compatibility. Since it can be determined whether or not to write to the medium after confirmation, failures in writing to the medium can be reliably reduced.
[0025]
According to the third aspect of the present invention, when the compatibility determination of the media of the same manufacturer as the media for which the compatibility determination has been performed once, the previous determination result is used, so the compatibility determination of the media of the same manufacturer as the previous is performed. In this case, the compatibility determination process is simplified and the compatibility determination can be performed quickly.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a schematic configuration of an optical disc apparatus according to an embodiment of the present invention.
FIG. 2 is a flowchart showing a processing flow of a media compatibility determination method according to the first embodiment of the present invention.
FIG. 3 is a flowchart showing a processing flow of a media compatibility determination method according to a second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Optical disk apparatus 2 Data control part (light reflectivity difference calculation means, compatibility determination means)
8 Data recording part (light reflectivity detection means)
17 A / D converter (light reflectance detection means)
18 Memory (memory means)

Claims (2)

In a media compatibility confirmation method applied to an optical disc apparatus that records and reproduces information by irradiating a recording surface of a recordable optical disc with a light beam, the optical reflectivity of the medium having good compatibility with the optical disc apparatus is stored. In addition, during the writing test to the medium subject to compatibility determination, the values from the lower limit value to the upper limit value of the light reflectance of the medium having good compatibility are divided into a predetermined number of stages, and the medium to be subjected to compatibility determination is determined. Reading in the test writing portion is performed a plurality of times, an average value of the light reflectance is obtained, and it is determined which of the above stages the average value corresponds to, and the medium to be subjected to compatibility determination and the optical disc apparatus A medium compatibility determination method applied to an optical disc apparatus, wherein the compatibility degree is determined . When the compatibility determination is performed, together with the result of the compatibility determination, the manufacturer code of the medium subjected to the compatibility determination is stored, and when the compatibility determination of another medium is performed, the manufacturer code is read from the medium, It is determined whether or not the manufacturer code is already stored. If the manufacturer code is stored, the compatibility determination result corresponding to the stored manufacturer code is used as the compatibility determination result of the media. 2. The media compatibility determination method applied to the optical disc apparatus according to claim 1, wherein if the manufacturer code is not stored, compatibility determination for the media is performed.

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