JP2000243021A - Method and device for determining medium compatibility for optical disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the failure of writing in a medium by determining a compatibility level at the stage of test writing in the medium and enabling a user to confirm this test. SOLUTION: This determination method includes the steps of: performing test writing in a medium to be determined for compatibility (S1); then calculating a reflection rate in the area of the test writing (S2); determining the position of the average value in the 10 levels of the light reflection rate of highly compatible medium, from an upper limit value to a lower limit value (S3 to S9); and display the result by a numeral from 1 to 10 (S10). Thus, a user verifies the compatibility level of the medium based on a specific numerical value, and the failure of writing in the medium is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for judging media compatibility applied to an optical disk apparatus and an apparatus therefor.

[0002]

2. Description of the Related Art Conventionally, in an optical disk device capable of recording information on an optical disk, writing may easily fail depending on the medium, and compatibility of writing between the optical disk device and the medium has been a problem. . Therefore, in the manual of the optical disk device, a medium that is compatible with the optical disk device is recommended. In order to solve this problem, Japanese Patent Application Laid-Open No.
As shown in Japanese Patent No. 61, in order to ensure the reliability of recorded information and to improve write performance,
C of the information obtained from the wobble signal of the truck
An optical information recording / reproducing device configured to use RC (Cyclic Redundancy Check: ID part error detection code) has been proposed.

[0003]

However, in the above-described writing with the conventional optical disk device, the user must confirm the media recommended in the manual of the device and then purchase the writing media. Therefore, if the user inadvertently purchases a medium that is incompatible with the device, writing on the medium may fail. In addition, there is a possibility that the recommended media will be discontinued due to a media model change or the like. In such a case, in order to find a medium that is compatible with the optical disk device, it is necessary to find a medium that is compatible by writing on several types of media.
Therefore, it takes a great deal of time to judge whether the compatibility is good or bad, and if the writing fails, the medium must be discarded. Further, the optical information recording / reproducing apparatus disclosed in the above-mentioned publication is intended to solve the problem of actually performing writing, and thus cannot solve the above problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and it is possible to determine a compatibility level at a test writing stage before performing writing on a medium, and allow a user to confirm the compatibility level. It is an object of the present invention to provide a media compatibility determination method applied to an optical disk device and a device that can reduce the number of failures in writing to a medium by making it possible.

[0005]

To achieve the above object, the invention according to claim 1 is applied to an optical disk apparatus for recording / reproducing information by irradiating a recording surface of a recordable optical disk with a light beam. In the media compatibility checking method performed, the optical reflectance of a medium having good compatibility with the optical disk device is stored, and the light reflectance at the portion where the write test was performed during the write test on the medium for which compatibility is to be determined. The reflectivity is measured, and the difference between the stored optical compatibility of the medium having good compatibility with writing is obtained. Based on the difference in the optical reflectance, the medium for which compatibility is to be determined and the optical disc device are compared. This is to determine compatibility.

[0006] In the above method, the compatibility determination target is determined based on the difference between the light reflectance obtained when writing is performed on a medium having good compatibility and the light reflectance obtained during a writing test on the medium subjected to compatibility determination. The compatibility between the medium and the optical disk device can be determined before writing to the data recording area of the medium, and the failure of writing to the medium can be reduced. be able to.

[0007] The invention described in claim 2 is the first invention.
A medium compatibility determination method applied to the optical disk device according to the above, wherein the light reflectance of a medium with good write compatibility is stored, and the compatibility is good at the time of compatibility determination for a medium to be subjected to compatibility determination. Dividing the value from the lower limit to the upper limit of the light reflectance of the media into a predetermined number of stages,
Performing the reading in the test writing portion of the medium to be subjected to compatibility determination a plurality of times, obtaining the average value of the light reflectance thereof, and determining which of the stages corresponds to the average value, the compatibility determination is performed. This is to determine the degree of compatibility between the target medium and the optical disk device.

In the above method, the average value of the light reflectance of the medium to be determined for compatibility is determined according to which one of the lower and upper limits of the light reflectance of the compatible medium is located. Since the degree of suitability of the medium for the optical disk device is determined, the user of the apparatus can know the degree of compatibility specifically, and the failure in writing to the medium can be reduced more reliably.

[0009] The invention described in claim 3 is the first invention.
Or a media compatibility determination method applied to the optical disk device according to claim 2, wherein, when the compatibility determination is performed, a maker code of the medium subjected to the compatibility determination is stored together with a result of the compatibility determination. When performing compatibility determination of another medium, a maker code is read from the medium to determine whether or not the maker code is already stored. If the maker code is stored, the stored maker code is stored. The compatibility determination result corresponding to the maker code is used as the compatibility determination result of the medium. If the maker code is not stored, the compatibility determination is performed for the medium.

In the above-mentioned method, for a medium for which compatibility has been determined once, the maker code thereof is stored together with the compatibility determination result, and the next time the compatibility determination of the same maker media is performed, the previous determination result is used. ,
When the compatibility of media of the same maker is determined, the processing is simplified, and the compatibility can be quickly determined.

According to a fourth aspect of the present invention, there is provided a media compatibility determining apparatus applied to an optical disk device, wherein the optical disk records and reproduces information by irradiating a recording surface of a recordable optical disk with a light beam. In a media compatibility checking device applied to a device, a storage unit storing a light reflectance when writing is performed on a medium having good compatibility with the optical disk device, and a disk set in the optical disk device. A light reflectance detecting means for detecting the light reflectance at the time of the test writing, and a difference between the light reflectance of an arbitrary medium detected by the light reflectance detecting means and the light reflectance stored in the storage means. The arbitrary medium and the optical disc drive based on the light reflectance difference calculation means to be calculated and the light reflectance difference calculated by the light reflectance difference calculation means. It is obtained by a determining compatibility determining means for compatibility with.

In the above configuration, when the compatibility between the apparatus and the medium is determined, the light reflectance difference calculating means determines the light reflectance of the medium having good compatibility stored in the storage means,
The difference between the light reflectance of the target medium for compatibility determination detected by the light reflectance detection means is calculated, and the compatibility determination means determines compatibility between the medium and the device based on the difference. Before writing to the medium, the compatibility between the medium and the optical disk device can be known, and the failure of writing to the medium can be reduced.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a media compatibility determination method according to an embodiment of the present invention and an optical disk device to which the method is applied will be described with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of an optical disk device according to the present invention. The optical disk device 1 includes a data control unit 2 for controlling data to be written on the medium, a spindle motor 3 for rotating the medium when writing information to the medium or reading information from the medium, and a lens unit of the optical pickup device. And a drive control unit 5 for controlling the operation of the actuator 4 and the like for driving. The data control unit 2 is connected to an interface control unit 7 for inputting and outputting various signals to and from the personal computer 6.
Further, a data recording section (light reflectance detecting means) 8 for controlling the optical pickup device for recording and writing on the medium is connected via a data modulation section 9 and a data processing section 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 the information to be written.

The data control unit 2 has an internal buffer 1 for temporarily storing write data sent from the personal computer 6 through the interface control unit 7.
5, and a counter 16 for counting the step value for the determination of the media compatibility to be described later. 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, and the A / D conversion unit 17 has the measured light reflectance. And a non-volatile memory (storage means) 18 for storing the information. This memory 18 is also connected to the data control unit 2.

Next, a method for judging media compatibility by the optical disk device 1 will be described with reference to FIG. This medium compatibility determination method is based on the premise that the light reflectance at the time of writing on a medium having good compatibility with the optical disk device 1 is measured, and the optimum value is stored in the memory 18. When a medium to be written is set in the optical disk device 1 and a trial write (write 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 test writing, information is read from the area where the test writing has been performed a plurality of times (S2), and a plurality of reflectances on the medium surface are measured. Next, the value of the light reflectance of the compatible medium stored in advance is read out 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). The step value is a light reflectance value representative of each block when a value between the lower limit value and the upper limit value of the light reflectance of a compatible medium is equally divided into ten blocks. .

Next, in S2, the average value of the light reflectance when information is read from the test writing area a plurality of times is calculated (S2).
7) The read average value is compared with the above step value (S8). The read average value is compared in order from the smallest step value of the block. If the read average value exceeds the step value, the counter 16 is incremented (S9). This count is stopped at the block where the readout average value is equal to or smaller than the step value, and the count number at that time is output to the personal computer 6 as a compatibility determination result and displayed (S10). As a result, the numerical values from 1 to 10 are displayed on the personal computer 6, but the block containing the optimum value of the light reflectance of the writing is the fifth block which is intermediate between the lower limit and the upper limit. 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 disc device 1 is, and the further the displayed numerical value is from “5”, the worse the compatibility with the optical disc device 1 is. Can be grasped.

A media compatibility determination method according to a second embodiment of the present invention will be described with reference to FIG. In general,
The compatibility of the media with the optical disk drive is determined by the media manufacturer, in other words,
It can be said that there is 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 maker code in the memory 18 together with the compatibility determination result for the media whose compatibility has been determined once.
Is stored, and the compatibility determination is not newly performed for media of the same manufacturer, but the past compatibility determination result is used. This medium compatibility determination method is also based on the premise that it is assumed that the light reflectance at the time of writing on a medium having good compatibility with the optical disk device 1 is measured and the optimum value is stored in the memory 18. This is the same as in the first embodiment.

When a medium to be written is set in the optical disk device 1, a maker code recorded in a lead-in area of the medium is read (S).
11) It is checked whether this maker code has already been stored in the memory 18 (S12). If the maker code is stored in the memory 18 (S12
YES), the count number corresponding to the maker code is read from the memory 18 (S24), and the count number is output to the personal computer 6 as a compatibility determination result and displayed (S23).

If the maker code read from the medium is not stored in the memory 18 (N in S12)
O), similar to the first embodiment, a series of processes for determining media compatibility is performed (S13 to S21). However,
When the counting for the read average value is completed, the counted number is stored in the memory 18 together with the maker code of the disk (S22). Thereafter, the count number is output to the personal computer 6 as a compatibility determination result and displayed (S23).

As described above, according to the medium compatibility determination method and the optical disk device 1 of the present embodiment, when the test writing is completed, the compatibility of the medium with the optical disk device 1 is indicated. Before writing the data, the compatibility between the medium and the optical disk device can be known, and the failure of writing to the medium can be reduced. Further, since the compatibility determination result of the medium is indicated by a numerical value indicating the degree of compatibility, the user can easily know the success rate of writing on the medium and determine whether or not to perform writing. Can help. In addition, the second
In the embodiment of the present invention, when a medium of a manufacturer that has been subjected to compatibility determination in the past is set in the optical disc device 1, the past compatibility determination result is displayed and a new compatibility determination is not performed. Therefore, the process for displaying the degree of compatibility can be simplified, and the time required for displaying the degree of compatibility can be shortened.

It should be noted that the present invention is not limited to the configuration of the above embodiment, and various modifications are possible. For example, in the above embodiment, the compatibility determination is performed based on where the average value of the light reflectance of the medium to be subjected to the compatibility determination is located from the lower limit to the upper limit of the light reflectance of the compatible media. 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 to be subjected to the compatibility determination and the optimal value of the light reflectance of the compatible medium is determined. The compatibility may be determined based on
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.

The present invention is not limited to the configuration of the above-described embodiment, and various modifications are possible. For example, in the above embodiment, the optimum value of the light reflectance of a 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. You may. Further, in the above embodiment, after determining the compatibility of the media, the degree of the compatibility is indicated by a numerical value, but the present invention is not limited to this.
It may simply indicate whether the compatibility is good or not. Further, in the above embodiment, the degree of compatibility is displayed in 10 levels, but the number of levels is not limited to this. Further, 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]

As described above, according to the first or fourth aspect of the present invention, at the end of test writing before writing to the data recording area of the medium, the compatibility between the medium and the device is known. be able to. Therefore, it is possible to easily know the compatibility with the optical disk device without actually writing the data in the recording area of the medium. This allows
You can reduce the failure of writing to the media,
There is no waste of media.

According to the second aspect of the present invention, even if the medium is compatible with the optical disk device,
It is possible to know the degree of the compatibility specifically, and the user can confirm whether the compatibility is high and determine whether or not to perform the writing on the medium, so that the writing on the medium can be surely performed. Failures can be reduced.

According to the third aspect of the present invention, when the compatibility of a medium of the same maker as the medium for which compatibility has been determined once is determined, the result of the previous determination is used.
When the compatibility determination of the media of the same maker as the previous time is performed, the process for the compatibility determination is simplified, and the compatibility determination can be performed quickly.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a schematic configuration of an optical disc device according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating a processing flow of a media compatibility determination method according to the first embodiment of the present invention.

FIG. 3 is a flowchart illustrating 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 reflectance difference calculation means, compatibility judgment means) 8 Data recording part (light reflectance detection means) 17 A / D conversion part (light reflectance detection means) 18 Memory (storage means)

Claims (4)

[Claims] 1. A medium compatibility checking method applied to an optical disk device for recording / reproducing information by irradiating a recording surface of a recordable optical disk with a light beam, comprising: The reflectance is memorized, and during the writing test on the media for which compatibility is to be determined, the light reflectance of the portion where the writing test was performed is measured, and the light reflection of the stored media with good compatibility is written. A medium compatibility determination method applied to an optical disk device, wherein a difference between the medium and the optical reflectance is determined, and a compatibility between a medium to be subjected to compatibility determination and the optical disk device is determined based on the difference in light reflectance. 2. The light reflectance of a medium having good compatibility for writing is stored, and when the compatibility of a medium to be subjected to compatibility determination is determined, the light reflectance from the lower limit to the upper limit of the light reflectance of the medium having good compatibility is determined. Is divided into a predetermined number of steps, reading is performed a plurality of times in a test write portion of the medium to be subjected to compatibility determination, and an average value of the light reflectance is obtained.The average value corresponds to any of the above steps The media compatibility determination method applied to an optical disk device according to claim 1, wherein the degree of compatibility between the medium for which compatibility determination is to be performed and the optical disk device is determined by determining whether or not the media is compatible. 3. When the compatibility determination is performed, a maker code of the medium subjected to the compatibility determination is stored together with a result of the compatibility determination, and when the compatibility determination of another medium is performed, the maker code is used from the medium. Reads the code and determines whether it is a maker code that has already been stored.If the maker code is stored, the compatibility determination result corresponding to the stored maker code is returned to the media. 3. The media compatibility determination method applied to the optical disk device according to claim 1, wherein if the maker code is not stored, the compatibility determination is performed on the medium. 4. A media compatibility checking device applied to an optical disc device for recording / reproducing information by irradiating a recording surface of a recordable optical disc with a light beam. Storage means for storing the light reflectance when writing is performed by the optical disk device; light reflectance detection means for detecting the light reflectance when test writing is performed on a disk set in the optical disk device; A light reflectance difference calculating means for calculating a difference between the light reflectance of an arbitrary medium detected by the means and the light reflectance stored in the storage means; and a light reflectance difference calculating means for calculating the difference. An optical disc device comprising: compatibility determining means for determining compatibility between the arbitrary medium and the optical disc device based on a light reflectance difference. Media congeniality determination device applied to.