JP2002319130A - Optical recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical recording and reproducing device with which the service life of an optical recording medium is prolonged by reducing the number of times of recording/reproducing for determining recording conditions to a writable optical recording medium as much as possible. SOLUTION: Recording pulse standard conditions specifying the positional information of a recording pulse are recorded in advance on the first area of an optical disk 1 different from a data recording and reproducing area. The recording pulse conditions indicating the positional information of the recording pulse used when data were recorded in the past are recorded on and reproduced from a second area with device intrinsic information on a recording and reproducing device. When device intrinsic information on a present device is in the device intrinsic information reproduced from the second area, a recording pulse conditions demodulator 6 sets the recording pulse conditions of the same device. Simple learning using partial recording pulse conditions from the second area is adaptively carried out to the optical disk 1 on which recording was carried out by a recording and reproducing device having device intrinsic information involved with the device intrinsic information on the present device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical recording / reproducing apparatus, and in particular, reads out standard recording pulse conditions pre-recorded in a predetermined area of a writable optical disk, and sets recording pulse conditions for the recording / reproducing apparatus. The present invention relates to an optical recording / reproducing apparatus for recording / reproducing data.

[0002]

2. Description of the Related Art The DVDRAM standard is an example of an optical disk capable of rewriting a large amount of data. In this standard,
4.7 GB of data can be recorded on one side of a 12 cm diameter optical disk using a phase change recording film by a mark edge recording method, and has already been put to practical use. Further, in order to put an optical disk having a higher density than this optical disk to practical use, an optical recording / reproducing apparatus capable of reducing a deviation of a mark edge position due to thermal interference between marks, which is a problem in high density recording of a phase change optical disk, has been proposed. (Patent No. 2679596
issue).

In this conventional optical recording / reproducing apparatus, when data is recorded as mark marks on an optical disk as an amorphous mark, a laser beam is recorded by forming a plurality of pulse trains called multi-pulses. In high density recording,
Since the size of the mark to be recorded and the distance between the spaces (between the marks) are small, the heat of the laser beam applied to form the mark reaches not only the self-mark but also the preceding and succeeding marks through the space. Is distorted in the mark shape.

In order to avoid this, the leading pulse position of a multi-pulse for forming a mark is determined by the relationship between the self-mark length and the previous space length, and the last pulse position of the multi-pulse for forming a mark is determined. By changing the relationship between the self-mark length and the rear space length, the thermal interference between marks is corrected in advance and recorded. This control of the recording pulse position is generally called recording compensation. The recording pulse conditions (parameters for recording compensation) have different values for each combination of mark spaces. For example, marks 3Tm and 4T of marks 3Tm and 4T having a length of 3T (where T is a clock cycle; the same applies hereinafter). With the above mark 5Tm or more,
The space between the space 3Ts having a length of 3T, the space 4Ts having a length of 4T and the space 5Ts having a length of 5T or more is shown in FIG.
There is a relationship as shown in (A) and (B). FIG. 10 shows the positional relationship between these value marks and spaces.

[0005] In order to realize an actual optical recording / reproducing apparatus, it is necessary to store recording pulse conditions for performing recording compensation in the apparatus or an optical disk. In order to be able to use a plurality of optical disks having different characteristics, that is, different recording pulse conditions, this value may be recorded in advance on the optical disk, and read out and set by the device when used.

However, when mass-producing recording / reproducing devices for optical discs, due to variations in characteristics of components used and environmental changes,
Individual devices do not always have the same characteristics. For example, in an optical head equipped with a laser driving unit and a laser related to recording, even if the same current waveform is supplied to the laser, the pulse width changes due to a variation in laser characteristics as a main factor. Further, the same light emission waveform is not always obtained in each device. Similarly, during mass production of the optical disc itself, a certain degree of characteristic variation occurs, and even if recording is performed with the same light emission waveform, the same mark shape is not always obtained on each disc.

Therefore, if the standard recording pulse conditions determined by the reference device having the standard characteristics using the reference disk having the standard characteristics are directly used in a mass-produced disk and the device having the varied characteristics, the combination In some cases, proper recording / reproduction is not performed, resulting in poor quality. Further, if the disc is manufactured under sufficient quality control and has a small characteristic variation, the problem is small, but if the standard recording pulse conditions pre-recorded on the disc greatly deviate from the disc performance, the apparatus is used. Cannot faithfully reproduce the recording pulse standard conditions read from the disk, even with this disk.

Therefore, from a writable optical disk,
For a plurality of possible combinations of the mark length and the space length, the recording pulse standard conditions determined by the reference device having the standard characteristics are read using the reference disks having the standard characteristics for each of the combinations. The optimum recording pulse condition is determined based on the jitter measurement result obtained by performing test writing under the standard condition and the jitter measurement result obtained by recording / reproducing the recording pulse standard condition by uniformly or individually changing the recording pulse standard condition. Such an optical recording / reproducing apparatus is conventionally known (Japanese Patent Application Laid-Open No. 2000-200418).

[0009]

However, in the above-mentioned conventional optical recording / reproducing apparatus, the position information for all the combinations of the mark length and the space length in the standard condition of the recording pulse read from the optical disk is used to write the information on the optical disk. The first trial writing is performed, and the first jitter is detected by reproducing the trial writing. Similarly, the second trial writing is performed on the optical disk by using the positional information obtained by uniformly changing the above positional information by a predetermined amount. To reproduce the data, detect the second jitter, select the position information used for trial writing of the smaller of the first and second jitters, and determine the recording pulse condition, etc. Since the above method is performed each time recording is performed, it takes time to actually start recording data. This is a problem particularly when the recording start timing is important, such as when the user wants to start recording immediately after loading the optical disk into the recording / reproducing apparatus.

In the above-mentioned conventional optical recording / reproducing apparatus,
The recording condition is determined by repeating the above-described test writing and the jitter measurement by reproduction using the position information for some of the combinations of all mark lengths and space lengths in the recording pulse standard conditions read from the optical disk. In that case, the recording condition is determined by repeating the above-described test writing and the jitter measurement by reproduction using the position information for all the combinations, and the time until the start of recording is reduced compared to the above case. You can.

However, there is no description as to when such a method of determining the recording pulse conditions is adopted.
For example, if the latter simple method of determining the recording pulse conditions is adopted for a new optical disc on which data is recorded for the first time in an optical recording / reproducing apparatus, optimal recording is possible even if the time until the determination of the recording pulse conditions can be reduced to some extent. Pulse conditions cannot be determined.

Furthermore, in the above-mentioned conventional optical recording / reproducing apparatus,
Since the above-described trial writing and reproduction are repeated each time recording is performed, there is a problem that the recording film in the trial writing area is rapidly deteriorated and the life of the optical disk is short.

The present invention has been made in view of the above points,
An object of the present invention is to provide an optical recording / reproducing apparatus capable of shortening an average recording start time prior to recording and capable of always determining an optimum recording condition.

Another object of the present invention is to provide an optical recording medium capable of realizing a long life of an optical recording medium by minimizing the number of times of recording and reproduction for determining recording conditions on a writable optical recording medium. A playback device is provided.

[0015]

In order to achieve the above object, the present invention provides a standard recording pulse for each of a plurality of possible combinations of mark length and space length recorded on a writable optical recording medium. Reproduce the recording standard conditions from the optical recording medium in which the recording information or the recording standard conditions specifying the standard recording power are recorded in advance, correct the recording standard conditions according to the selected learning method, and determine the optimal position of the recording pulse. A recording learning means for adaptively finding information or a recording condition indicating an optimum recording power; and a recording condition obtained by the recording learning means in an information area different from the data recording / reproducing area of the optical recording medium together with the apparatus specific information of the apparatus. Recording means for recording, acquiring means for reproducing an information area of the optical recording medium when loading the optical recording medium, and acquiring recording conditions and apparatus-specific information, and acquiring means In response to the acquisition result by, in which and a print learning changing means for changing the recording learning method for the recording learning means.

According to the present invention, the learning result of the recording condition is recorded on the optical recording medium, and in the case of self-recording, the recording condition reproduced from the optical recording medium on which data is to be recorded at the time of loading can be used as it is. For an optical recording medium on which recording has been performed by a recording / reproducing device for device-specific information related to the device-specific information of the own device, a simple method utilizing a part of the recording conditions of the related device recorded above is used. Learning can be performed adaptively.

Further, in order to achieve the above object, the recording learning changing means of the present invention is capable of self-recording or recognizing the self-recording from the recording conditions and the device-specific information which are the recording learning results of the recording learning means. It is characterized in that it is means for judging whether the device is another device or an unrecognizable device or the information area is unrecorded, and changes the recording learning method according to the judgment result.

Further, in order to achieve the above object, the recording learning changing means of the present invention automatically reproduces the reproduced device specific information from the recording conditions and the device specific information which are the recording learning results of the recording learning means. It is a means for changing the recording learning method so that the learning process is simplified as the device information is closer to the device-specific information.

Further, the present invention achieves the above object,
For each of a plurality of possible combinations of the mark length and the space length to be recorded on the writable optical recording medium, using a reference recording medium having standard characteristics, a reference device having standard characteristics was used to determine the combination. The first area in which the recording standard condition specifying the recording pulse position information or recording power is recorded in advance, and the recording condition indicating the recording pulse position information or recording power used when recording data in the past,
From an optical recording medium having a predetermined second area to be recorded and reproduced together with the apparatus-specific information of the recording and reproducing apparatus used at the time of data recording other than the area different from the data recording and reproducing area, recording standard conditions, recording conditions and apparatus Reproducing means for reproducing the unique information, and device-specific information of the own apparatus for which data is to be recorded on the optical recording medium in device-specific information reproduced from the second area of the optical recording medium by the reproducing means. If there is the same device unique information, the recording unit sets the recording condition of the same device reproduced from the second area of the optical recording medium by the reproducing means when the same device unique information is present. One of the recording pulse standard condition reproduced from the area No. 1 and the recording condition of the apparatus specific information most relevant to the apparatus specific information of the own apparatus reproduced from the second area. The recording pulse or the recording power, or the recording pulse or the recording power under the mixed condition of the both conditions, is changed for each of the number of patterns corresponding to the device-specific information most relevant to the device-specific information of the own device, and the recording / reproduction is performed. Learning means for performing learning to select and set a recording condition for obtaining an optimum recording pulse or recording power at which a jitter measurement value or an error rate of each reproduction signal is equal to or less than an allowable value; and a recording condition obtained by the learning means. A recording means for recording in the second area of the optical recording medium together with the device specific information of its own device.

Here, the learning means is the same as the own apparatus which records data on the optical recording medium in the apparatus-specific information reproduced from the second area of the optical recording medium by the reproducing means. If there is no device-specific information and the recording conditions of a plurality of devices are reproduced from the second area, the first
The recording pulse or recording power is changed only for each of the least recording patterns in accordance with the majority decision result for each recording pattern between the recording standard conditions reproduced from the area and the recording conditions reproduced from the second area. The recording condition may be selected and set so as to obtain an optimum recording pulse or recording power at which the jitter measurement value or error rate of each reproduction signal is equal to or less than an allowable value.

When the device-specific information reproduced from the second area of the optical recording medium cannot be recognized, the learning means may determine whether the recording pulse or the recording pulse based on the standard recording conditions reproduced from the first area of the optical recording medium is used. The recording power is changed for each predetermined combination of the adjacent space length and the self-mark length, and the recording and reproduction are repeated by sequentially changing the conditions, and the jitter or error rate of the obtained reproduction signal is less than the allowable value. Full learning is performed to set a value corrected from the recording standard condition as a recording condition so that the device-specific information reproduced from the second area includes information of the same device of the same manufacturer as the own device. 1 is performed, and when there is information of a different device from the same maker as the own device, the number of recording / reproducing of the recording pulse or recording power corresponding to the number of combinations is the first. The second simple learning is performed more than the simple learning and less than the full learning, and when there is information of the device of the maker related to the own device, the number of recording / reproducing of the recording pulse corresponding to the number of combinations is the second. It is characterized in that third simple learning is performed more than simple learning and less than full learning.

[0022]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of an optical recording / reproducing apparatus according to the present invention. In FIG. 1, a writable phase-change type optical disk 1 is rotated at a high speed in a predetermined direction by a motor 2 and an optical head 3 is rotated.
Reads the recorded data and writes the data. In this embodiment, the optical disc 1 is provided with a recording pulse condition management area DIZ (Disc Identification Zone) in addition to the data recording / reproducing area.

As shown in FIG. 2, this recording pulse condition management area DIZ has a recording pulse standard condition recording area DIZR.
(Disc Identification Zone for Read) and recording pulse condition recording / reproducing area DIZW (Disc Identification Zo)
ne for Write). This DIZR area is dedicated to reproduction, and includes the disc manufacturer's identification information (ID) at the time of shipment of the optical disc 1, the recommended value of laser power at the time of recording / erasing and reproduction, and the standard recommended value of recording pulse (recording). Pulse standard conditions) are recorded in advance.

The DIZW area is a recording / reproducing area, and includes a unique information such as an ID of an apparatus maker, an ID (apparatus ID) and a serial number of the optical recording / reproducing apparatus itself, and version information of the optical recording / reproducing apparatus. Recording, erasing, and recording at the time when the optical recording and
This is an area for recording optimum recording conditions such as a recommended laser power value and a recording pulse during reproduction. This DIZW
As will be described later, information for 16 vehicles can be recorded in the area, for example.

On the other hand, the recording / reproducing method for the data recording / reproducing area is the same as the conventional method. However, in the present embodiment, data is recorded by the following recording method. That is, when writing data to the optical disc 1, the mark edge recording method using multi-pulses is used, and the data is written to the disc as mark and space length information. The mark length is 3T to 14T (T is clock 1
It is assumed that a modulation method in which the length of the space and the length of the space are combinations of integer values of 3T to 14T is used.

Further, in this embodiment, the marks 3Tm, 4Tm, 5Tm or more and the spaces 3Ts, 4Tm
It is assumed that in a combination of s and 5Ts or more, mark shape distortion and inter-mark thermal interference occur at the boundary between the mark and the space. In this case, the leading pulse position of the mark indicating the leading pulse position of the multi-pulse for forming the mark by the relationship between the self-mark length and the preceding space length is as shown in FIG.
As shown in FIG. 9A, there are nine 3 × 3 patterns, and the trailing edge pulse position of a multi-pulse for forming a mark is represented by the relationship between the self-mark length and the trailing space length. As shown in ()), there are nine combinations of 3 × 3, and different value conditions can be set for each of the combinations, and there are a total of 18 condition setting values.

In FIG. 9A, for example, “5Ts3
"Tm" indicates the condition of the mark front end pulse at the boundary between the space of 5T or more and the subsequent 3T mark. In FIG. 9B, for example, “3Tm5Ts”
Indicates the condition of the trailing edge pulse of the mark at the boundary between the 3T mark and the following space of 5T or more.

In FIG. 10, the relationship between Ts and Tm is the positional relationship between the leading edge of the recording pattern to be recorded on the optical disk and the leading pulse of a continuous recording pulse for actually driving the laser. The relationship after Tm and after Ts indicates the positional relationship between the trailing edge of the recording pattern desired to be recorded on the optical disc and the trailing pulse of a continuous recording pulse for actually driving the laser. That is, FIG. 10 shows the relationship between the mark and the space on the optical disk and the recording pulse for these values.

Using a representative disk serving as a reference for characteristics and a representative recording / reproducing apparatus serving as a reference, 18 recording pulse conditions shown in FIG. 9 are determined. The recording pulse conditions determined in this way are recorded in advance in a specific area (DIZR in FIG. 2) on the optical disc as recording pulse standard conditions. There are other items in the recording pulse standard conditions, such as the width of the first pulse of the recording pulse, the width of the intermediate pulse, the width of the last pulse, and the width of the cooling pulse added after the last pulse. In the present embodiment, a description will be given of a pulse condition whose value adaptively changes according to a combination pattern of a mark and a space to be recorded.

Next, the operation of this embodiment will be described with reference to FIG.
This will be described with reference to the flowchart of FIG. In the present embodiment, when the optical disc 1 is loaded into the recording / reproducing apparatus, it is detected whether the optical disc 1 is a new disc for the apparatus or a disc that has already been recorded. The detection method is as follows.
The individual information is reproduced by reproducing, for example, a BCA (burst cutting area) in which the unique individual information (disc ID etc.) recorded in the disc is recorded. Each time a new optical disc is recorded, this individual information is reproduced. Equipment E
The same solid information that is stored in the EROM and reproduced from the BCA (burst cutting area) of the optical disk at the time when the optical disk is loaded into the device,
It is conceivable that the detection is made by comparing whether or not the individual information is read out from the EEPROM.

However, this detection method may be used, but in this embodiment, the optical disc 1 has a D
There is an IZ (Disc Identification Zone) area.
Since the information is recorded once by the same device using the IZ area and the optimum condition is recorded in the DIZW area,
By playing back the ZW area, it is determined whether the optical disk 1 is a new optical disk or an optical disk that has been recorded. Then, in the present embodiment, when recording next, the recording condition of this DIZW area is reproduced, and recording is performed based on this condition. The preparation time is shortened.

That is, prior to recording desired information data on the optical disc 1, first, at the time when the optical disc 1 is loaded or in a preparation stage for recording, the DI
The ZR area is reproduced (step S1 in FIG. 3). Note that D
This step position is not essential for reproducing the IZR area. This DIZR area is an area necessary for performing recording learning.

For this purpose, the spot is moved to the DIZR area of the optical disk 1 on which the optical head 3 rotates, and a track recorded in advance under standard recording pulse conditions is scanned.
At this time, the reproduction signal from the DIZR area of the optical disk 1 by the optical head 3 is converted into a binarized signal by the equalizer binarizing circuit 4 and then supplied to the PLL circuit 5. PLL
The circuit 5 detects the edge of the binarized signal, generates a reproduction clock synchronized with the edge, converts the binarized signal into data synchronized with the reproduction clock, and converts the binarized signal into data synchronized with the reproduction clock.
And outputs the time shift amount between the edge of the reproduced clock and the edge of the binarized signal to the jitter measuring circuit 7 as a phase error pulse. At this time, the jitter measurement by the jitter measurement circuit 7 is not performed, or the jitter is not used.

Subsequently, the data in the DIZW area of the optical disk 1 is reproduced by the optical head 3 in order to determine whether the optical disk 1 is a new optical disk or an optical disk that has been recorded (step S2 in FIG. 3). . A reproduction signal from the DIZW area of the optical disk 1 by the optical head 3 is converted into a binarized signal by an equalizer binarization circuit 4 and then converted into data synchronized with a reproduction clock by a PLL circuit 5 to generate a recording pulse condition. The optical disk 1 is supplied to the demodulator 6 and determines whether the optical disk 1 is a new optical disk that has not been recorded or an optical disk that has been recorded in the past, based on whether or not data exists in the DIZR area. (Step S3 in FIG. 3).

The DIZW area is, as shown in FIG.
It consists of six recording areas for recording and reproducing similar contents. The unique information of the device that first recorded data on the optical disc 1 is recorded in the first area, and the unique information of the device that recorded data second. The information is recorded in the first area after moving the recording information in the first area to the second area. By sequentially performing this, each unique information of up to 16 devices can be recorded in the DIZW area.

Accordingly, in order to determine whether the optical disk 1 is a new optical disk or an optical disk that has been recorded in step S3, the recording pulse condition demodulator 6 outputs
It detects whether or not there is unique information (device ID or the like) of the own device among all the unique information recorded in the ZW area. Here, if no data exists in the DIZW area,
Alternatively, if the DIZW area itself does not exist, it is determined that the optical disk is a new optical disk on which recording has never been performed, and full learning is performed without performing simple learning described later according to the present embodiment (see FIG. Step S13).

In this full learning, an optimum recording pulse condition is obtained by using all the recording pulse standard conditions by the same method as described in the above-mentioned publication. To describe this full learning in detail, first, as a first step, the recording pulse condition demodulator 6 supplies the recording pulse standard condition reproduced and stored from the DIZR area of the optical disc 1 to the recording pulse condition correction circuit 10. I do. The recording pulse standard conditions are shown, for example, in FIGS. In FIG. 4B,
The default values for all the combinations at the mark front end are set as the mark front end pulse conditions, and the default values for all the combinations at the mark end are set as the mark rear end pulse conditions in FIG. The unit of the numerical value shown in FIGS. 4A to 4F is ns, and the recording clock cycle T is 17 ns.

Subsequently, as a second stage of the full learning, test writing of data is performed on the optical disk 1 under the above-described standard recording pulse conditions. For this purpose, first, the laser spot of the optical head 3 is moved to a writable track of the optical disk 1, and the recording pulse condition correction circuit 10 generates a random signal from the random pattern generator 11a in the pattern generator 11. . This random signal is input to the recording compensation circuit 12, where it is converted into multi-pulse data based on the recording pulse standard condition from the recording pulse condition correction circuit 10.

For example, if the random signal is 6Ts4Tm (6
When the signal of the 4T mark following the T space is included, the leading edge of the recording pulse for the 4T mark is shifted in the +4 ns time axis direction according to the recording pulse standard condition shown in FIG. In addition, 4
When the signal of Tm6Ts (6T mark following 4T mark) is included, the edge of the last pulse of the recording pulse for the 4T mark is -25 ns in the time axis direction according to the recording pulse standard condition shown in FIG. Will be shifted.

As described above, the multi-pulse data in which the leading pulse and the trailing pulse are shifted by the recording compensation circuit 12 are as follows:
The current is supplied to the laser driving device 13, converted into a current for driving a laser diode in the optical head 3, and supplied to the optical head 3. The optical head 3 records multi-pulse data on a writable track.

Next, as the third stage of the full learning, random data written on the optical disk 1 by trial is reproduced by the optical head 3, and the jitter of the reproduced signal is measured. For this reason, the multi-pulse data recording track of the optical disk 1 is reproduced by the optical head 3 and the reproduced signal is supplied to an equalizer binarization circuit 4 to obtain a binarized signal. To generate a reproduced clock, and the reproduced clock and the phase error pulse of the binarized signal are output to the jitter measuring circuit 7.

The measuring operation of the jitter measuring circuit 7 will be described in detail with reference to the waveform diagram of FIG. Now, a recording pattern (here, a random signal) shown in FIG. 5A is output from the pattern generation device 11, and a recording pulse shown in FIG. It is assumed that a recording mark as shown in FIG. 3C is formed, and a reproduced signal having the waveform shown in FIG. 3D is obtained from the optical head 3 for reproducing the optical disk 1. In this case, the binarized signal output from the equalizer binarization circuit 4 is shown in FIG. 5E, and the reproduction clock shown in FIG.

Here, at the position where the recording pattern shown in FIG. 5A corresponds to the leading edge of the 4Tm pulse, the leading edge of the binarized signal is ahead of the edge of the reproduced clock (FIG. 5). (G)), when synchronized (FIG. 5)
(H)) and the case of delay ((I) in the figure). If it is ahead, there is a jitter distribution around the point where it is ahead, if it is synchronized, there is a jitter distribution around the point that is synchronized, and if it is late, it is around the point that is late. Has a jitter distribution. FIG. 5 (G) shows the jitter distribution collected and superimposed on the time axis.
(H) and (I) are shown at the right end.

If there are many cases of synchronization (FIG. 5 (H)), the spread width of the superposed jitter distribution is narrow. When the vehicle is moving ahead (FIG. 5 (G)) or when it is delayed (FIG. 5
When (I)) is included, the spread width of the superposed jitter distribution increases. In this way, the jitter distribution with respect to the mark front end jitter is collected at regular time intervals, and the superimposed result is output as a first jitter measurement signal (mark front end jitter voltage Vf (0)). Also, the jitter distribution for the trailing edge jitter of the mark is collected and the result of superposition is the second.
Jitter measurement signal (mark trailing end jitter voltage Vr (0))
Is output as These first and second jitter measurement signals indicate the degree of jitter, and are supplied to the recording / reproduction controller 8 and stored as measurement results. After the storage of the jitter voltage in the recording / reproduction controller 8, the process of the fourth stage of the full learning is performed.

In the fourth stage, the recording pulse standard condition sent from the recording pulse condition demodulator 6 is uniformly changed (ie, time-shifted), and data is trial-written on the optical disk 1. FIGS. 6B and 6E show the recording pulse standard conditions. 6A shows a correction value obtained by uniformly adding 1 to the value of the recording pulse standard condition of the mark front end pulse, and FIG. 6D shows a correction value obtained by uniformly adding the value of the recording pulse standard condition of the mark rear end pulse. Shows a correction value obtained by adding -1 to. Similarly,
FIG. 6C shows a correction value obtained by uniformly adding −1 to the value of the recording pulse standard condition of the mark front end pulse, and FIG.
Is 1 for the value of the recording pulse condition of the trailing edge pulse of the mark.
Indicates a correction value obtained by adding. Examples of specific numerical values in FIGS. 6A to 6F are shown in FIGS. 4A to 4F, respectively.

In the fourth stage of the full learning, FIG.
Assuming that test writing is performed using the correction value of (D), the uniform changer 9a outputs +1 as a correction value for the pulse condition at the front end of the mark and -1 for the pulse condition at the rear end of the mark. The recording pulse condition correction circuit 10 adds the above correction value to the recording pulse standard condition output from the recording pulse condition demodulator 6 and outputs a recording pulse condition setting value. Thereafter, a random signal is recorded on the optical disc 1 in the same manner as in the second stage.

In the fifth stage of the full learning, the random data recorded in the fourth stage is reproduced, and the jitter of the reproduced signal is measured. In the same manner as in the third stage, the mark front end jitter voltage Vf (+1) and the mark rear end jitter voltage Vr (−1) are stored in the recording / reproduction controller 8. Hereinafter, the processing of the fourth and fifth steps is repeated while changing the correction value, and the jitter voltage is collected. For example, as shown in FIG. 7, the correction values of the mark front end pulse condition and the mark rear end pulse condition are paired to form (+1, −1), (+2, −2), (−1, +
1), (-2, +2). Examples changed to (+1, -1) are shown in FIGS. 6A and 6D, and specific numerical values are shown in FIGS. 4A and 4D. The amount of change +1 indicates a change of +1 nanosecond. In this way, the recording pulse standard condition is changed uniformly with the correction value, and the points plotted in FIGS. 7A and 7B are stored in the recording / reproduction controller 8.

FIGS. 7A and 7B show two examples of the measurement results of the jitter voltages Vf and Vr obtained by uniformly changing the correction values as described above. The pair of the mark front end pulse condition and the mark rear end pulse condition in the lowest case is adopted. If the characteristics of the optical disk used, the pre-recorded recording pulse standard conditions, and the characteristics of the recording / reproducing apparatus match, the correction value is 0 as shown in FIG. , And both the jitter voltage Vf at the rear end of the mark and the jitter voltage Vr at the rear end of the mark become minimum or smaller than the allowable value.

On the other hand, the characteristics of the optical disc used
If the pre-written recording pulse standard conditions do not match the characteristics of the recording / reproducing device, as shown in FIG. 7B, the jitter voltage at the rear end of the mark is allowable when the correction value is 0. When the value exceeds the value and the correction value is not 0, the jitter becomes the minimum value or the allowable value or less.

Therefore, in the full learning, of the combinations of the mark front end jitter and the mark rear end jitter obtained by trial writing under each condition, the combination in which the larger of the front end and the rear end jitter is smaller than the minimum value or the allowable value is used. Is used as the optimum recording condition of the apparatus.

In the sixth stage of the full learning, the set value of the recording pulse condition to be used in the recording / reproducing apparatus is determined based on the jitter voltages collected in the fourth and fifth stages. In the recording / reproducing controller 8 of FIG. 1, from among the set of the mark front end jitter voltage and the mark rear end jitter voltage for each correction value, a correction value in which the larger of the front end and rear end jitter voltages is equal to or smaller than the allowable value is selected. , Which are used as recording conditions for the recording / reproducing apparatus thereafter.

As described above, in the full learning in step S13 in FIG. 3, among the standard recording pulse conditions reproduced from the DIZR area of the optical disc 1, a plurality of mark front end pulses determined by the combination of the previous space length and the self mark length are set. All the conditions and all of the multiple pulse trailing edge pulse conditions determined by the combination of the self mark length and the trailing space length are
The recording pulse condition correction circuit 10 corrects the value corrected from the recording pulse standard condition so that the jitter of the recording / reproducing signal is equal to or less than the allowable value by the recording pulse condition correction circuit 12 and the recording pulse condition generator. 11c is set as a recording pulse condition of the recording / reproducing apparatus.

The recording pulse condition (full learning result)
The device manufacturer ID, the device ID, and the device ID input from the recording pulse condition demodulator 6 via the recording pulse condition correction circuit 10 so as to be used when recording the optical disc 1 currently loaded in the recording / reproducing device. Serial number,
It is output from the recording pulse condition generator 11c together with device-specific information such as device version information, etc.
And the ID of the device maker and the ID of the device in the DIZW area of the optical disc 1 by the optical head 3 through the laser driving device 13.
It is recorded together with device-specific information such as D, serial number, and device version information (step S14 in FIG. 3).

On the other hand, in step S3 of FIG. 3, the recording pulse condition demodulator 6 converts the unique information (such as the device ID) of the own device into all the unique information recorded in the DIZW area of the optical disk 1. When it is determined that there is
It is determined whether or not information unique to the device, such as the device manufacturer ID, the device ID, the serial number, and the device version information, reproduced from the DIZW area, is the same as the unique information of the recording / reproducing device. (Step S in FIG. 3)
4).

If all of the unique information is the same, it is determined that the recording learning for the optical disk 1 to be described later has already been completed by this apparatus, and no learning is performed. That is, a process without learning is performed (step S5 in FIG. 3). As a result, the apparatus generates a recording pulse based on the recording pulse condition of the apparatus reproduced from the DIZW area and performs recording on the optical disk 1.

Next, if none of the unique information reproduced from the DIZW area is the same as the unique information of the recording / reproducing apparatus, the recording pulse condition demodulator 6 sets the recording apparatus. It is determined whether or not there is information having the same device ID as that of the device maker and the serial number of the device (step S6 in FIG. 3). In the playback device unique information, the device manufacturer ID and the device ID are the same as this device, and if there is information with a different serial number, the above unique information recorded in the DIZW area of the optical disc 1 can be referred to. The recording pulse condition demodulator 6 determines that the recording pulse condition has the same tendency, and causes the recording pulse condition demodulator 6 to perform the first simple learning based on the current data in the DIZW area or the data in the DIZR area (FIG. 3). Step S7). When there are a plurality of devices having different serial numbers of the same device, the first simple learning may be performed by averaging a plurality of device data and using the average value as a reference value.

Next, the first simple learning will be described in detail. The first simple learning is simpler learning than the second and third simple learning described later. Of the 18 recording pulse conditions, two recording pulse conditions of 5Ts5Tm and 5Tm5Ts satisfy the recording pulse standard conditions. Use as it is,
The remaining 16 recording pulse conditions are obtained by interpolating by calculating from some of the 12 types of recording patterns shown in FIG. 8 and the other conditions.

For example, when the mark front end pulse condition is 5Ts3
If it is Tm, it is determined using the recording pattern shown in FIG. In FIG. 9, the mark front end pulse condition is 3
In the case of Ts3Tm, it is determined using the recording pattern shown in FIG. However, when the mark front end pulse condition is 4
To determine the case of Ts3Tm, see FIG.
Instead of using the recording pattern shown in FIG. 3, the obtained correction value of 5Ts3Tm, the value of 5Ts3Tm under the standard condition, the correction value of 3Ts3Tm obtained, and the 3T of the standard condition
From the relationship between the value of s3Tm and the value of 4Ts3Tm under the standard condition, a correction value of 4Ts3Tm is obtained by calculation such as interpolation.
Since the operation of determining the correction value of 4Ts3Tm is an electrical calculation operation, the required time is much shorter than the case where the recording pattern shown in FIG.

That is, in the first simple learning in step S7, all the recording pulse conditions are not determined by recording and reproducing the corresponding recording patterns, but some of the conditions are interpolated by calculation from other conditions. For this purpose, in the recording / reproducing apparatus for the optical disk shown in FIG. 1, in the recording pulse standard conditions, each of a plurality of mark front end pulse conditions determined by a combination of the selected previous space length and the self mark length, and the selected self Record a recording pattern corresponding to each of a plurality of mark trailing edge pulse conditions determined by the combination of mark length and trailing space length, and separately correct each standard condition so that the jitter of the reproduced signal is below the allowable value The recording pulse condition correction circuit 10 sets the corrected value as the recording pulse condition of the recording / reproducing device in the recording compensating circuit 12 and the recording pulse condition generator 11c.

The recording pulse condition (first simple learning result) is supplied from the recording pulse condition demodulator 6 to the recording pulse condition correction unit 6 so that it can be used when recording the optical disk 1 currently loaded in the recording / reproducing apparatus. The recording pulse condition generator 11c outputs the information together with the device manufacturer ID, the device ID, the serial number, the device version information, and other device-specific information input through the circuit 10, and the recording compensating circuit 12 and the laser driving device 13 Through the optical head 3 into the DIZW area of the optical disc 1 by the ID of the device maker,
It is recorded together with device-specific information such as device ID, serial number, and device version information (step S1 in FIG. 3).
4).

As for the recording pulse condition which is not selected in the recording / reproducing controller 8, a value obtained by interpolation from the correction value of the selected recording pulse condition is set as a recording pulse condition of the recording / reproducing apparatus, and data recording / reproducing is performed. do. As a result, the time until all the recording pulse conditions are set can be shortened compared to the time of full learning or the second and third simple learning described later. Note that, among the recording pulse conditions, 5Ts
5Tm and 5Tm5Ts show examples in which standard recording pulse conditions read from an optical disk are used as they are, but the present invention is not limited to this. And then the recording condition setting method may be applied. In addition, if the pattern has the same total mark length and the same total space length, includes two marks and two spaces, and includes at least one edge of an attribute to be determined, jitter can be detected. .

Referring again to FIG. 3, the recording pulse condition demodulator 6 determines in step S6 that one or both of the ID of the device maker and the ID of the device in the reproduction device unique information are not the same as this device. When the determination is made, it is next determined whether or not the device maker ID is the same and the device maker device ID is different (step S8 in FIG. 3). If the ID of the device maker is the same and the ID of the device maker is different, the data currently recorded on the optical disc 1 can be referred to a certain extent, but it is determined that the tendency of the recording pulse condition is different, and the current The second simple learning is performed based on the reproduction data in the DIZW area and the data in the DIZR area (step S9 in FIG. 3).

Although the second simple learning is slightly more complicated than the first simple learning, it is simpler than the third simple learning described later. Of the 18 recording pulse conditions, 5Ts5T
The two recording pulse conditions m and 5Tm5Ts use the standard recording pulse conditions as they are, and the remaining 16 recording pulse conditions are obtained using the corresponding 12 types of recording patterns shown in FIG.

For example, in order to determine a mark front end pulse condition 5Ts4Tm having a self mark length of 4Tm and a previous mark length of 5Ts or more, 8Tm, 6Ts, 4Tm, and 4Tm shown in FIG.
A recording pattern that is a 6Ts repetition signal is used.
All recording patterns have the same total mark length and the same total space length, include two marks and two spaces, change one edge to be determined, and use the other three edges fixed. I do.

First, in the first stage of the second simple learning, the recording pulse condition demodulator 6 supplies the recording pulse standard condition reproduced and stored from the DIZR area of the optical disk 1 to the recording pulse condition correction circuit 10. I do. Subsequently, in the second stage, for example, when the recording pulse condition 5Ts4Tm is determined, the output from the predetermined pattern generator 11b shown in FIG.
A predetermined recording pattern shown in FIG. That is, the recording pulse condition correction circuit 105Ts
The recording pulse standard condition of 4 Tm is supplied as it is to the recording compensation circuit 12 as a recording pulse condition setting value, where the predetermined recording pattern is converted into multi-pulse data, and the multi-pulse data is driven by a laser driving device 13 to drive a laser. The current is supplied to the optical head 3 and is recorded on a writable track on the optical disc 1 by the optical head 3.

Subsequently, as the third stage of the second simple learning, the above-mentioned predetermined recording pattern which has been trial-written is reproduced, and the jitter of the reproduced signal is measured by the jitter measuring circuit 7. This jitter measuring method is performed in the same manner as in the case of full learning. However, here, only one of the mark front end pulse condition and the mark rear end pulse condition is obtained first. Therefore, when only the mark front end pulse condition is obtained, the mark front end jitter voltage Vf (0) measured by the jitter measuring circuit 7 is used.
Is supplied to the recording / reproduction controller 8 and stored.

In the fourth step of the second simple learning, the individual changer 9b in the changing device 9 calculates a correction value for the default value of the mark front end pulse condition 5Ts4Tm as
For example, +1 is output. Recording pulse condition correction circuit 10
Outputs a value obtained by adding a correction value +1 to the default value of 5Ts4Tm included in the recording pulse standard condition to the recording compensation circuit 12 as a recording pulse condition setting value. Hereinafter, the predetermined recording pattern of FIG. 8A is recorded on the optical disc 1 as in the second stage.

At the fifth stage of the second simple learning, the fourth stage
The predetermined recording pattern recorded in the step is reproduced, and the jitter of the reproduced signal is measured in the same manner as in the third step to obtain a mark front end jitter voltage Vf (1).
To memorize. Hereinafter, the same processing as in the fourth and fifth steps is repeated while changing the correction value, and the jitter voltage is collected.

Based on the results of the test writing and reading performed a plurality of times performed as described above, the recording / reproduction controller 8
Selects a correction value at which the mark front end jitter voltage for each correction value is equal to or smaller than an allowable value or the minimum, and supplies the selected value to the recording pulse condition correction circuit 10. Thereby, the recording pulse condition correction circuit 10 uses the value of the mark front end pulse condition 5Ts4Tm of the recording / reproducing apparatus thereafter.

Next, the rear end pulse condition of mark 4Tm5Ts
The test writing and the jitter measurement are repeated a predetermined number of times in the same manner as described above using the predetermined recording pattern shown in FIG. The recording / reproduction controller 8 selects a correction value at which a trailing edge jitter voltage Vr that is less than or equal to or less than the allowable value is obtained, and the recording pulse condition correction circuit 10 determines the selected correction value for the subsequent recording / reproducing apparatus. It is used as the value of the mark rear end pulse condition 4Tm5Ts.

As described above, in the second simple learning, among the standard recording pulse conditions read from the DIZR area of the optical disk 1, a plurality of mark front end pulse conditions determined by the combination of the previous space length and the self mark length are used. Each of the recording patterns of FIG. 8 corresponding to each of the plurality of mark trailing edge pulse conditions determined by the combination of the self mark length and the subsequent space length is recorded, and the jitter of the reproduced signal is less than the allowable value. Then, the recording pulse condition correction circuit 10 uses the recording pulse condition correction circuit 10 and the recording pulse condition generator 11c to output the recording pulse of the recording / reproducing device. Set as a condition.

The recording pulse condition (second simple learning result) is used by the recording pulse condition demodulator 6 to correct the recording pulse condition so that the recording pulse condition demodulator 6 can use it when recording the optical disk 1 currently loaded in the recording / reproducing apparatus. The recording pulse condition generator 11c outputs the information together with the device manufacturer ID, the device ID, the serial number, the device version information, and other device-specific information input through the circuit 10, and the recording compensating circuit 12 and the laser driving device 13 Through the optical head 3 into the DIZW area of the optical disc 1 by the ID of the device maker,
It is recorded together with device-specific information such as device ID, serial number, and device version information (step S1 in FIG. 3).
4).

Referring back to FIG. 3, when the recording pulse condition demodulator 6 determines in step S8 that the device maker ID is not the same among the reproduction device unique information, the device maker is different. The ID of the device maker is
It is determined whether or not the ID is a related device maker ID that can maintain compatibility with the optical recording / reproducing device (step S10 in FIG. 3). When it is determined that the ID is the ID of the related apparatus maker, the third simplification learning is performed by simplifying the simplifiable portion based on the compatibility information between the related makers (step S11 in FIG. 3). ).

Although the third simple learning is slightly more complicated than the second simple learning, it is a simpler learning than the full learning described above.
This is a simple process in which the same items as those in the full learning are performed on the basis of the data in the R region, with the variation range of the pulse condition being narrowed. Therefore, since the third simple learning can be easily analogized from the description of the full learning, the detailed description is omitted. The recording pulse condition, which is the learning result of the third simple learning, is set from the recording pulse condition correction circuit 10 to the recording compensation circuit 12 and the recording pulse condition setting unit 11c, and is also stored in the DIZW area of the optical disc 1 in this device. It is recorded together with the information (step S14 in FIG. 3).

Next, if it is determined in step S10 that the ID is not the ID of the related apparatus maker, or if data exists in the DIZW area but cannot be read (step S12 in FIG. 3), the contents of the DIZR area of the optical disk 1 are read. Is reproduced, and the above-described full learning is performed based on this value (step S13 in FIG. 3). The recording pulse condition that is the learning result of the full learning is the same as the recording pulse condition that is the learning result of the first to third simple learnings.
At the same time, the information is set in the DIZW area of the optical disk 1 together with the device-specific information (step S14 in FIG. 3).

As described above, according to the present embodiment,
The recording pulse standard conditions are recorded in advance in the DIZR area, and information unique to the optical recording / reproducing apparatus that has performed recording on the optical disk 1 is recorded in the DIZW area together with the recording pulse conditions. When performing recording, it is detected from among the device unique information of up to 16 devices read from the DIZW area of the optical disc 1 whether or not there is the same information as the unique information of the own device. Since the recording pulse conditions reproduced from the DIZW area are used as they are, and if there is no identical one, simple learning is performed by referring to the data of the most relevant apparatus in the apparatus specific information read from the DIZW area. The number of recording / reproducing items for determining the recording pulse condition can be reduced as much as possible, and the optimum recording pulse condition can be determined in a much shorter time than before.

The first and second simple learning and the full learning described above are described in the above-mentioned patent publications as each embodiment. Since the selection and the execution are adaptively switched according to the past history, the optimum recording pulse condition can always be determined in a short time.

At the time of the first to third simple learning, the recording pulse condition of the DIZW area of the optical disc 1 and the D
The two data of the recording pulse standard conditions in the IZR area may be based on only one of them, or may be adjusted based on one of the values based on the other to mix both values. It doesn't matter.

Further, the contents of the items to be simplified in the first to third simple learning are not limited to the above-described embodiment, and the full contents to be performed when the DIZW area is unrecorded or unreadable. It goes without saying that any item that can be somewhat simplified by the discriminable device for learning is within the scope of the present invention.

The present invention is not limited to the above embodiment. For example, if the data of the own device is
Even in the case of being in the ZW area, learning in the lowest range may be performed. Also, it has been described that the optimum recording pulse width is determined by changing the recording pulse width as the recording learning.
In the sense of learning the power of recording, values of recording power, erasing power, reproducing power, etc., for example, when the asymmetry is 5
It may be set to 0%.

Further, learning for minimizing the jitter at the time of reproduction or minimizing the error rate at the time of reproduction may be performed at a previous stage and / or at a later stage. FIG. 11 shows an example of the relationship between the error rate of the reproduced signal and the correction value (offset amount). In this case, the error rate in the case of recording a space having a length of 5T following a mark having a length of 4T is shown, and a correction value at which the error rate is equal to or less than an allowable value (for example, 0.001) is selected.
A recording pulse corresponding to the correction value is set as a recording pulse condition.

Further, in the above embodiment, the contents of the recording learning are changed depending on the manufacturer, the device, and the serial number. However, the comparison result between the data in the DIZR area and the data in the DIZW area is used alone or The recording pulse may be learned together with the result of comparison with the unique information with the self apparatus according to the above embodiment. For example, when there is only one data in the DIZW area for 18 recording patterns, and it matches about 1/2 of the data of the recording standard pulse condition in the DIZR area, the remaining unmatched recording patterns The above-described learning may be performed only for.

For example, when the recording pulse conditions of two devices whose only serial numbers recorded in the DIZW area are different from the own device are recorded, for example, data is recorded for nine recording patterns, respectively. If they match, the first simple learning may be performed on the remaining non-matching recording patterns. For example, if the recording pulse conditions of the own device and two different devices of the related maker recorded in the DIZW area are recorded, and they are greatly different from each other, if the recording pulse conditions are greatly different from each other, the serial number or the manufacturer name is used. The recording pulse condition that is likely to be reliable may be selected (weighted), and the third simple learning or the full learning may be performed based on the value.

If, for example, three recording pulse conditions are recorded in the DIZW area with respect to, for example, 18 recording pattern values, and these values are almost the same,
Even in the case where the recording pulse conditions are largely different from the recording pulse standard conditions recorded in advance in the DIZR area, simple learning may be performed using the recording pulse conditions in the DIZW area.

In the above-described embodiment, the term “no learning” or “full learning” refers to the determination of an optimum recording pulse condition, and the recording is performed even when recording is performed by the self apparatus (self recording). The recording power and the erasing power may be learned again beforehand and recorded in the DIZW area. Also, when learning, jitter and error rate are described as contents to be measured. However, asymmetry, which is an asymmetry of a short T with respect to a long T, increases as the recording power increases. The optimum recording pulse condition or the optimum recording power may be determined by utilizing the fact that the same result is obtained even if the recording pulse condition is changed on average. Further, since the amplitude of the reproduction signal increases as the power increases, the same result can be obtained even if the recording pulse condition is changed on average, and the optimum recording pulse condition or the optimum power is determined. I do not care.

Further, the environmental conditions (temperature, humidity, power supply voltage, elapsed time) at the time of recording are recorded and compared with the current state. I don't care. The recording medium to be recorded / reproduced by the present invention is not limited to an optical disk such as a phase change or a magneto-optical device, but may be a card type or the like, and is applicable to all optical recording media.

[0087]

As described above, according to the present invention,
In the case of self-recording, the recording conditions reproduced at the time of loading from the optical recording medium in which data is to be recorded are used as they are, so that learning for setting the recording conditions becomes unnecessary, and the device-specific information of the own device is used. For an optical recording medium on which recording has been performed by a recording / reproducing apparatus for related apparatus-specific information, simple learning that partially utilizes the recorded recording conditions of the related apparatus is adaptively performed. Therefore, the influence of the characteristic variation of the writable optical recording medium and the optical recording / reproducing apparatus can be reduced, the average recording learning time can be shortened, and the optimum recording condition can always be determined.

Therefore, when recording timing is important, for example, when it is necessary to insert a disc and immediately perform recording in an optical disc video recorder or the like, the time until the start of recording can be shortened, thereby improving the commercial value of the product. effective.

Further, according to the present invention, the number of times of recording / reproduction for determining recording conditions for a writable optical recording medium can be minimized, so that the life of the optical recording medium can be extended.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of the device of the present invention.

FIG. 2 is a flowchart for explaining the operation of the present invention.

FIG. 3 is an explanatory diagram of a recording pulse condition management area on an optical disk to be recorded and reproduced according to the present invention.

FIG. 4 is a diagram showing specific numerical values for a uniform time shift.

FIG. 5 is a signal waveform diagram for explaining the operation of the jitter measuring circuit.

FIG. 6 is a diagram of a uniform time shift in the first simple learning.

FIG. 7 is a characteristic diagram showing a jitter measurement result.

FIG. 8 is a recording pattern waveform diagram in the second simple learning.

FIG. 9 is a diagram showing recording pulse conditions.

FIG. 10 is an explanatory diagram of recording pulse conditions.

FIG. 11 is a diagram illustrating an example of a relationship between an error rate of a reproduction signal and a correction value (offset amount).

[Explanation of symbols]

 Reference Signs List 1 optical disk 2 motor 3 optical head 4 equalizer binarizing means 5 PLL circuit 6 recording pulse condition demodulator 7 jitter measuring circuit 8 recording / reproducing controller 9 changing device 10 recording pulse condition correcting circuit 11 pattern generator 11a random pattern generator 11b Predetermined pattern generator 11c Recording pulse condition generator 12 Recording compensation circuit 13 Laser driving device DIZR Recording pulse standard condition recording area DIZW Recording pulse condition recording area

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shuji Hakojima 3-12 Moriyacho, Kanagawa-ku, Yokohama-shi, Kanagawa Japan F-term in JVC, Ltd. (Reference) 5D090 AA01 BB03 BB04 CC01 CC04 CC18 DD03 EE01 HH01 JJ12

Claims (3)

[Claims] 1. A recording standard condition that specifies standard recording pulse position information or standard recording power for each of a plurality of possible combinations of a mark length and a space length recorded on a writable optical recording medium. Reproduces the recording standard conditions from an optical recording medium on which recording is performed in advance, corrects the recording standard conditions according to the selected learning method, and adaptively changes the recording condition indicating the optimal recording pulse position information or the optimal recording power. A recording learning means, a recording means for recording the recording conditions obtained by the recording learning means in an information area different from a data recording / reproducing area of the optical recording medium together with device-specific information of an apparatus, Acquiring means for reproducing the information area of the optical recording medium at the time of loading, and acquiring the recording conditions and the device-specific information; An optical recording / reproducing apparatus, comprising: a recording learning changing unit that changes a recording learning method of the recording learning unit according to an acquisition result. 2. The apparatus according to claim 1, wherein the recording learning change unit is a self-recording device or another device that can be recognized or an unrecognizable device based on the recording condition and the device-specific information that are the recording learning result of the recording learning unit. 2. The optical recording / reproducing apparatus according to claim 1, further comprising means for judging whether the information area is unrecorded or not, and changing the recording learning method according to the judgment result. 3. The apparatus according to claim 2, wherein the recording learning change unit is configured to determine that the reproduced device unique information is close to the device unique information of the own device from the recording condition and the device unique information which are the recording learning result of the recording learning unit. 2. The optical recording / reproducing apparatus according to claim 1, wherein the recording / reproducing method is a means for changing the recording / learning method so as to perform a learning in which a learning step is simplified as the recording / reproduction process is performed.