JP3209840B2 - Information recording / reproducing method of information recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording / reproducing method for an apparatus for recording / reproducing information using media such as an optical disk, a magneto-optical disk, a phase change optical disk, and an optical card. The present invention relates to an improvement in an information recording / reproducing method that sometimes reduces the number of times of trial writing processing by recording parameters on a medium. More specifically, in an information recording / reproducing apparatus that uses a removable medium (removable information recording medium) that performs recording after obtaining an optimum parameter, information that can identify the apparatus that has obtained the optimum parameter is recorded. In addition, the present invention relates to an information recording / reproducing method in which setting of non-optimal parameters is prevented in consideration of variations in optimum parameters due to individual drive differences.

[0002]

2. Description of the Related Art Conventionally, when recording information on a medium (information recording medium), an information recording / reproducing apparatus performs trial writing in a specific area so that recording can be performed in an optimum state, and the reproduction state is determined. Therefore, an information recording / reproducing method for determining and setting an optimal parameter is known. As such parameters, power at the time of writing (current value flowing through the laser diode), pulse width (expanding or narrowing a short pulse) and the like are necessary.

[0003] If such a method is adopted, it is possible to know the optimum state set at the time of recording by reading out this parameter at the time of subsequent recording and reproduction. Since the number of times of use of the area is larger than that of the other areas, the specific area for trial writing may be deteriorated. If the test writing area is deteriorated, the optimum parameters are changed, so that the recording operation cannot be performed under the optimum conditions.

As one method for solving such inconvenience, a method has been proposed in which, once an optimum parameter is obtained, the parameter is recorded on a medium to reduce the number of trial writing processes. (For example, Japanese Patent Application Laid-Open No. 61-165825). However, in the case of removable media, it is not always necessary to use the same manufacturer, model, and drive.
Instead, it can be used with various types of drive devices of various manufacturers.

[0005] However, in this case, if the optimum parameters are different between the manufacturers or if there is an individual difference in the drive device, the parameters set at an angle become meaningless. For example, even if the optimal parameters are set for a certain model or drive device, if they are set for another model or drive device,
There was a disadvantage that the recording operation could not be performed under optimal conditions.

As described above, in recent years, the standardization of optical disks and the like has progressed, and there has been a tendency that the use of recording and reproducing the same medium by drives of various models of a plurality of companies has increased. For this reason, there is a possibility that recording and reproduction are performed using parameters that are not necessarily optimal due to a difference in parameters between drive manufacturers and the like, and such optimal parameters may vary depending on temperature and aging. Is also changing.

However, in the conventional information recording / reproducing method for performing test writing, these elements (data) are not recorded on the medium. The information recording / reproducing method of the present invention aims to improve this point, but has a common point in that data relating to parameters is recorded on a medium as in the information recording / reproducing method of performing conventional test writing. .

Therefore, the format of the media will be described. For example, 90 mm (3.5 ") of the ISO standard
The track format of the magneto-optical disk shown in FIG.
It is like.

FIG. 4 is a diagram showing an example of a track format configuration of a magneto-optical disk of the ISO standard. In the figure, the row direction (vertical direction) indicates a media area, the column direction (horizontal direction) indicates a track number and a radius, indicates an inner control zone, and indicates an outer control zone.

The format shown in FIG. 4 is defined for a magneto-optical disk. That is, the track numbers "-154 to -17" and "10016 to 101"
53 ", an inner and outer test area is provided for each drive.

In the case of this magneto-optical disk, parameters are recorded using an arbitrary area such as the inner control zone and the outer control zone. Next, a configuration example of a conventional information recording / reproducing apparatus will be described.

FIG. 5 is a functional block diagram showing an example of a main part configuration of a conventional information recording / reproducing apparatus.
In the figure, 1 is an upper device, 2 is an optical disk device, 3 is a control unit thereof, 31 is a CPU, 32 is a control memory, 4
Denotes a drive unit, 41 denotes a write control unit, 42 denotes a read control unit, and 5 denotes a recording medium.

FIG. 5 shows a case where the information recording / reproducing device is the optical disk device 2. The optical disk device 2
Drive unit 4 having an interface with recording medium 5
And a control unit 3 having an interface with the host device 1 and having a control memory 32. Then, the writing control unit 41 and the reading control unit 42 of the drive unit 4 perform writing or reading on the recording medium 5.

A CPU 31 controls the entire system of the optical disk device 2 shown in FIG. The above is an outline of the information recording / reproducing method of the information recording / reproducing apparatus for reducing the number of times of the trial writing process by recording the conventional parameters on the medium.

[0015] As described above, in the case of a removable medium, it is not necessarily the case that the removable medium is used by the same maker, the same model, and the same drive device. If there is an individual difference in the device, the parameters set in the angle will be meaningless. As a result, even if the optimum parameters are set for a certain model or drive device, if the parameters are set for another model or drive device, there is a disadvantage that the recording / reproducing operation cannot be performed under optimum conditions.

[0016]

According to the present invention, the conventional parameters are recorded on a medium, so that the inconvenience in the information recording / reproducing method for reducing the number of times of the trial writing process, that is, the standardization of an optical disk or the like is advanced. In the case where recording and reproduction of the same media are performed by models of different manufacturers, parameters that are not necessarily optimal are recorded due to differences in parameters between drive manufacturers and the like, and recording and reproduction are performed with such parameters. To provide an information recording / reproducing method for an information recording / reproducing apparatus which solves the inconvenience that the parameter has been set and which can specify the apparatus which has set the parameter, thereby preventing the setting of a non-optimal parameter due to the variation of the parameter by the apparatus. With the goal.

[0017]

According to the present invention, firstly,
A device for recording or reproducing information on or from a medium, and before recording information on the medium, selects one or more parameters so that the recording state is optimized, and performs a test on the medium. In the information recording / reproducing method of the information recording / reproducing apparatus having the function of setting the parameters by performing the writing process and recording the set optimal parameters, the apparatus that has set the optimal parameters is specified. For recording information together with the parameters, and detecting means for detecting a difference between the devices based on the information of the device recorded by the device information recording device. But,
If the device has the optimum parameters, the test writing process is omitted.

Secondly, in the first information recording / reproducing method, a temperature measuring means for measuring a temperature of the apparatus when the optimum parameter is set is provided, and a predetermined value is determined from information on the measured temperature. The parameters are converted by the conversion method thus set, and the parameters are set.

Thirdly, in the first or second information recording / reproducing method, there is provided date information recording means for recording information of the date on which the parameter is set, together with the parameter, and , Date information is recorded.

Fourthly, in the third information recording / reproducing method, there is provided a number-of-days detecting means for judging whether or not the number of days is within a predetermined number of days from the date information in which the parameter is set, and When recording is performed, if it is detected that the number of days is within the predetermined number of days, the trial writing process is omitted.

Fifth, in the first, second, or third information recording / reproducing method, the parameters are recorded in a test writing area on a medium.

[0022]

According to the present invention, by recording information such as a maker name, a model name, a drive number, and the like for which a parameter is to be recorded on a medium together with a parameter to be recorded, it is possible to prevent an optimal parameter from being confused. (The invention of claim 1).

Further, by recording the temperature and date when the optimum parameters are obtained, changes in the parameters due to the temperature and changes over time (for example, adhesion of dust, etc.) are predicted, and the parameters are set. Automatic determination or re-execution of test writing can be performed (the inventions of claims 2 to 4). Furthermore, by recording each parameter in a test writing area on the medium, the user area is prevented from being reduced (the invention of claim 5).

[0024]

Embodiment 1 Next, an embodiment of an information recording / reproducing method of an information recording / reproducing apparatus according to the present invention will be described in detail with reference to the drawings. This embodiment is mainly based on claims 1 and 3.
However, the present invention also relates to the second, fourth, and fifth aspects of the present invention.

The hardware configuration of the information recording / reproducing apparatus used in the present invention is basically the same as that of FIG. 5 shown as a conventional example.
31 is different from the information recording / reproducing method in the conventional information recording / reproducing apparatus in that control is performed according to the flow of FIG. In the present invention, information (device name, model, and other data) of the device for which the optimal parameters have been set,
It is characterized in that information such as temperature and date at that time is recorded in a predetermined area on the medium, and is used as an optimum parameter at the time of reproduction.

FIG. 1 is a diagram showing an embodiment of the format of various data such as parameters used in the information recording / reproducing method of the information recording / reproducing apparatus of the present invention.
In the drawing, indicates a manufacturer name, indicates a model name, indicates a serial number (such as a serial number), indicates a temperature, indicates a date, and indicates various parameters.

As shown in FIG. 1, in the information recording / reproducing method of the present invention, together with various parameters used conventionally, for example, data such as power at the time of recording,
Data such as is recorded on a medium. That is, as information of the device in which the optimal parameters are set, for example, a manufacturer name, a model name, a serial number (a serial number, etc.) are recorded, and data (information, such as temperature and date) at that time are recorded. ) Is also recorded.

When the information recorded on the medium is inserted into the drive for reproduction, the drive first
The area in which data including these parameters is recorded is read, and the manufacturer name, model name, and the like are compared with the data such as the manufacturer name, model name, and the like held by the user. If the two do not match, a test writing process is performed to set the optimal parameters, but if they match, that is, if the device for which the parameters are set and the device to be reproduced are the same, The test writing process is omitted (the invention of claim 1).

Even when the optimum parameters are set by the drive itself, when a certain period or more has elapsed from the date on which the parameters were set in consideration of changes over time, a test writing process is performed to optimize the parameters. The parameters are set, but if within a certain period, the test writing process is omitted (the invention of claim 4). Next, the above processing will be described with reference to a flow.

FIG. 2 is a flowchart showing a flow of main processing at the time of parameter setting in the information recording / reproducing method of the information recording / reproducing apparatus of the present invention. In the figure, #
1 to # 6 indicate steps.

In step # 1, the data set (FIG. 1)
Is read).
In the next step # 2, it is determined whether or not the data has been written by its own drive.

If the data has been written by its own drive, the process proceeds to step # 3, and it is determined whether or not a predetermined time has elapsed (the invention of claim 1). If the fixed time has not elapsed, the parameters included in the data read in the previous step # 1 are set in the next step # 4, and the flow of FIG. 2 is returned. 3 and the invention of claim 4).

On the other hand, as a result of the judgment in the previous step # 2, if the data is not the data written in the own drive, and also as a result of the judgment in the previous step # 3,
If the predetermined time has elapsed, the process proceeds to step # 5.
In step # 5, a test writing process is performed, and in the next step # 6, parameters are newly recorded, and the flow of FIG. 2 is returned.

In the flow shown in FIG. 2, step # 2
In steps # 4 to # 4, if the parameters set in the medium are those set in the drive of the own device and the preset period has not elapsed, the optimal parameters already recorded are read. As a result, the reproducing operation can be immediately performed (the inventions of claims 1 and 4). Therefore, the state at the time of recording can be accurately determined, and a reproducing operation using optimal parameters can be performed.

The data shown in FIG. 1, that is, various parameters such as power data at the time of recording, and various data such as 〜 are stored in the inner control zone and the outer control zone shown in FIG. It is recorded in a test writing area on a medium like a control zone (the invention of claim 4). If such a test writing area is used, parameter information can be recorded without reducing the recording area for user data.

[0036]

Embodiment 2 Next, a second embodiment will be described. This second
The embodiment mainly corresponds to the invention of claim 2, but also relates to the invention of claims 1 and 3 to 5. The second embodiment is an improvement of the first embodiment. In addition to the various data shown in FIG. 1, information on the temperature and date when the optimum parameter is obtained is recorded, It is characterized by predicting a parameter change due to, or a parameter change due to a change over time (for example, adhesion of dust), using the parameter as an optimum parameter, and automatically re-executing a test writing process.

In the second embodiment, when performing recording or reproduction, the temperature of the drive is measured, compared with the temperature at the time when the optimum parameter is obtained, and the parameter is changed by a conversion method obtained in advance. And set. For example, in the case of a phase-change type optical disk, it is necessary to give a power that changes the temperature of the medium from the temperature T in the drive to the glass transition temperature Tg or the melting point Tm or more by the light emitted from the laser diode during recording. is there.

In this case, if the temperature T in the drive changes, the emission power of the laser diode must be changed accordingly. Therefore, in the case of the optical disk of the phase change method, temperature information is required as one data (information) in a recording state.

In this embodiment, the hardware configuration is the same as that of the conventional example shown in FIG. However, as in the first embodiment, the difference is that the CPU 31 performs control according to the following flow of FIG.

FIG. 3 is a flowchart showing a main processing flow when parameters are set in consideration of temperature change in the information recording / reproducing method of the information recording / reproducing apparatus of the present invention. Steps # 1 to # 6 in the figure are the same as those in FIG. 2, and # 11 to # 13 indicate added steps.

The flow of FIG. 3 includes steps # 11 to # 11.
13 is the same as FIG. 2 except that 13 has been added.
That is, in Steps # 2 to # 4, if the parameters set in the medium are those set in the drive of the own device, and the preset period has not elapsed, the process proceeds to Step # 11. .

In step # 11, the temperature inside the drive is measured. In the next step # 12, the temperature is compared with the temperature at the time when the optimum parameter was obtained. If there is a difference between the temperatures, the process proceeds to step # 13, in which the parameters are changed and set according to a previously determined conversion method.

As described above, in the second embodiment, the temperature inside the drive is measured and compared with the temperature when the optimum parameters are set. Then, when there is a temperature difference, the parameter is changed to a parameter that can obtain light emission power or the like corresponding to the difference.

Therefore, especially in a phase change type optical disk or the like, even if the temperature in the drive changes, it is possible to set an optimum parameter for the temperature (the invention of claim 2). Although not specifically shown, when a predetermined period elapses after the optimal parameters are set, the optimal parameters can be similarly changed according to the elapsed period.

[0045]

According to the information reproducing method of the information reproducing apparatus of the first aspect, it is possible to specify the apparatus in which the parameters are set. Therefore, the inconvenience of setting non-optimal parameters due to variations in parameters due to individual differences of the apparatuses is avoided.

According to a second aspect of the present invention, in the information reproducing method of the first aspect, the parameter is converted from the measured temperature information by a predetermined conversion method, and the parameter is set. . Therefore, even if there is a temperature change, it is not necessary to perform test writing again.

According to a third aspect of the present invention, in the information reproducing method of the first or second aspect, date information is recorded together with the set parameters. Therefore, if a certain period or more has elapsed since the date on which the parameters were set, the characteristics of the drive may change due to dust or the like, but the same characteristics as in the initial stage can be obtained by re-calibrating.

According to a fourth aspect of the present invention, there is provided the information recording / reproducing method according to the third aspect, further comprising a number of days detecting means for determining whether or not the number of days is within a predetermined number of days from the date information for which the parameters are set. I have. Therefore, when recording information on the medium, if it is detected that the number of days is within a predetermined number of days, the test writing process can be omitted.

According to the information reproducing method of the fifth aspect,
In the information recording / reproducing method according to claim 2 or 3,
Each parameter is recorded in a test writing area on the medium. Therefore, the parameter information can be recorded without reducing the recording area of the user data.

[Brief description of the drawings]

FIG. 1 is a diagram showing one embodiment of a format of various data such as parameters used in an information recording / reproducing method of an information recording / reproducing apparatus of the present invention.

FIG. 2 is a flowchart showing a flow of main processing at the time of parameter setting in the information recording / reproducing method of the information recording / reproducing apparatus of the present invention.

FIG. 3 is a flowchart showing a main processing flow at the time of parameter setting in consideration of a temperature change in the information recording / reproducing method of the information recording / reproducing apparatus of the present invention.

FIG. 4 is a diagram showing an example of a track format configuration of a magneto-optical disk of the ISO standard.

FIG. 5 is a functional block diagram showing an example of a main part configuration of a conventional information recording / reproducing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper device 2 Optical disk device 3 Control part 31 CPU 32 Control memory 4 Drive part 41 Write control part 42 Read control part 5 Recording medium

Continuation of the front page (56) References JP-A-5-89505 (JP, A) JP-A-5-143997 (JP, A) JP-A-62-88143 (JP, A) JP-A-5-128526 (JP) JP-A-6-309669 (JP, A) JP-A-5-144061 (JP, A) JP-A-5-46994 (JP, A) JP-A-5-166188 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) G11B ^7/ 00-7/013 G11B 19/02

Claims (5)

(57) [Claims] 1. An apparatus for recording or reproducing information on or from a medium, and before recording information on the medium, selecting one or more parameters so as to optimize a recording state, An information recording / reproducing method for an information recording / reproducing apparatus having a function of setting the parameters by performing a trial writing process on the medium and recording the set optimal parameters; Device information recording means for recording information for specifying the device that has been performed together with the parameters, and detecting means for detecting a difference between devices based on the information of the device recorded by the device information recording device. The information recording / reproducing method is characterized in that the test writing process is omitted when the device used for this is the device in which the optimal parameters are set. . 2. The information recording / reproducing method according to claim 1, further comprising a temperature measuring means for measuring a temperature of the apparatus when the optimum parameter is set, wherein the temperature is determined in advance from information on the measured temperature. An information recording / reproducing method, wherein the parameters are set by converting the parameters by a conversion method. 3. The information recording / reproducing method according to claim 1, further comprising: date information recording means for recording information of a date on which the parameter is set, together with the parameter; An information recording / reproducing method characterized by recording date information. 4. The information recording / reproducing method according to claim 3, further comprising: a number-of-days detecting means for judging whether or not the number of days is within a predetermined number of days from the date information in which the parameter is set, and recording the information on the medium. The test writing process is omitted when it is detected that the number of days is within the predetermined number of days. 5. The information recording / reproducing method according to claim 1, wherein the parameters are recorded in a test writing area on a medium.