JP2001266347A - Optical information recording/reproducing method and optical information recording/reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the test recording method capable of reproducing the information without error by reducing the influence of crosserase. SOLUTION: A test signal from a test signal generating part 103 is recorded on plural tracks by changing the amount of offtrack in an offset amount impressing part 113. A bit error rate of the previously recorded track is measured by a BER measuring part 112, and the amount of offtrack such that the bit error becomes minimum is set to an offtrack amount setting part 113 as the optimum amount of offtrack, then the actual information signal is recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing method and a recording / reproducing apparatus for an optical information recording medium for optically recording / reproducing information, and more particularly to a test recording method.

[0002]

2. Description of the Related Art In recent years, optical disks, optical cards, optical tapes, and the like have been proposed and developed as media for optically recording information. Among them, optical disks have been receiving attention as a medium capable of recording and reproducing information with a large capacity and a high density.

One type of rewritable optical disk is a phase change optical disk. A recording film used for a phase-change optical disk is in one of an amorphous state and a crystalline state depending on heating conditions and cooling conditions by laser light, and the two states are reversible. Further, the optical constants (that is, the refractive index and the extinction coefficient) of the recording film are different between the amorphous state and the crystalline state. In a phase change optical disk,
Two states are selectively formed on the recording film in accordance with the information signal, and the information signal is recorded / reproduced by utilizing the resulting optical change (ie, change in transmittance or reflectance). In order to obtain the above two states, an information signal is recorded by the following method.

First, a tracking operation for tracing a laser beam focused by an optical head on a track of an optical disk is performed. In the tracking operation, servo control is performed such that a laser beam passes through the center of a track using an electric signal (referred to as a tracking error signal) obtained from reflected diffraction light based on a track shape formed on an optical disk. is there. However, due to the asymmetry of the track shape or the asymmetry of the beam spot shape, servo control may be performed by intentionally adding an electrical offset to the tracking error signal. Shifting the trace position on the track by this offset is called off-track,
This offset amount is called an off-track amount.

When the recording film of the optical disc is irradiated in a pulse form with a power for raising the temperature of the recording film to a temperature higher than the melting point (this power level is called a recording power) (this pulse is called a recording pulse), the laser beam passes. At the same time, the molten portion is rapidly cooled and becomes a recording mark in an amorphous state. When a focused laser beam (this power level is called an erasing power) having an intensity that raises the temperature of the recording film to a temperature equal to or higher than the crystallization temperature and equal to or lower than the melting point is focused, the recording film in the irradiated portion is brought into a crystalline state. Become.

Further, in the case of mark edge recording in which information is recorded at both the leading edge and the trailing edge of a recording mark, in order to reduce distortion of the recording mark and make the position of the formed edge accurate, A plurality of recording pulses are used to form one mark. This is called multi-pulse recording. In multi-pulse recording, a recording pulse train for forming one mark is composed of a first pulse which is a first pulse, a last pulse which is a last pulse, and a sub-pulse which is a pulse train therebetween. In the shortest mark and a mark close to the length of the shortest mark, the sub-pulse or the last pulse overlaps with the first pulse and may be recorded by a single recording pulse.

In order to form a recording mark precisely,
The power level between the first pulse and the sub-pulse, between the sub-pulses, and between the sub-pulse and the last pulse may be different from the recording power and the erasing power in some cases. This power level is called inter-sub-pulse power. The duty of the sub-pulse train (the ratio of the pulse width to the length between the pulse widths) is usually set to 50% for ease of the circuit configuration of the recording / reproducing apparatus.
May be different.

Further, since the optical disk is a replaceable recording medium, the recording / reproducing apparatus for the optical disk needs to stably record / reproduce on / from a plurality of different media. However, even in the case of optical disks manufactured under the same conditions, if the thermal characteristics of the disks are different due to manufacturing variations or changes over time, the influence of the thermal interference between the formed recording marks and the formed recording marks will be different. Therefore, there is a possibility that the optimum edge position of the recording pulse differs depending on the optical disk.

Japanese Patent Laid-Open No. 4-137224 discloses an example of a method for stably recording and reproducing an information signal without being affected by the fluctuation of the optimum edge position of the recording pulse. This is achieved by performing test recording using a specific data pattern (this is called a test signal) prior to recording an information signal, reproducing the data, and measuring the reproduced signal to determine the edge position of the recording mark. It controls the optimum edge position of the pulse.

[0010]

However, in recent years,
There is a strong demand for higher density optical discs, and accordingly, a reduction in track pitch is also required. In such a case, in the conventional method, a so-called cross-erase occurs in which a part of a recording mark of a track adjacent to a recorded track is erased.

In particular, when the track pitch is made as small as possible, cross-erasure tends to occur even when the focused spot of the laser beam is slightly shifted from the center of the track during recording. In addition, even if the power between sub-pulses or the sub-pulse duty is adjusted in order to form a recording mark precisely,
Depending on the thermal characteristics of the disk, the recording mark was formed thicker in the radial direction and cross erase occurred.

As a result, the edge position of the recording mark recorded on the adjacent track is reproduced with a deviation from the original position, and there is a problem that an error occurs at the time of reproducing the information.

An object of the present invention is to solve the conventional problem and to provide a test recording method capable of reproducing information without error while minimizing cross erase.

It is another object of the present invention to provide a test recording method capable of reproducing information without error by eliminating a shift of an edge position of a recording mark caused when a cross erase occurs.

[0015]

In order to achieve the above object, a first optical information recording / reproducing method according to the present invention comprises a step of recording an information signal before recording an information signal on a rewritable optical information recording medium. An optical information recording / reproducing method for performing test recording on a test track on an optical information recording medium, comprising the steps of: (a) performing off-tracking with a predetermined off-track amount and recording a test signal on a test track; (A-2) recording the test signal on at least one track adjacent to the test track by off-tracking with the off-track amount after the step (a-1); and reproducing the test track. A step of measuring the quality of the signal (a-3); and a step of determining the optimum amount of off-track based on the quality of the reproduced signal (a-4). It is characterized in.

According to this method, it is possible to record an actual information signal with an off-track amount which is least affected by cross-erase, and it is possible to obtain an effect that a more precise information signal can be recorded.

According to a second optical information recording / reproducing method according to the present invention, a test track is recorded on a test track on the optical information recording medium before an information signal is recorded on the rewritable optical information recording medium. An optical information recording / reproducing method for recording, comprising: a step (b-1) of recording a test signal on the test track with parameters of a predetermined recording waveform;
After the step (b-1), a step (b-2) of recording the test signal on at least one track adjacent to the test track with the parameters of the predetermined recording waveform.
Measuring the quality of the reproduction signal of the test track (b-3); and
(B-4) determining an optimum parameter of the recording waveform.

According to this method, it is possible to record an actual information signal with an optimum recording waveform parameter with less influence of cross-erase, and it is possible to obtain an effect that more precise recording of an information signal becomes possible.

Further, in the second optical information recording / reproducing method according to the present invention, the step (b-1) comprises the step of off-tracking by the first off-track amount OT1 to form a predetermined recording waveform on the test track. A test signal is recorded using parameters, and the step (b-2) includes a second off-track amount OT.
2, the test signal is recorded on a track adjacent to at least one of the test tracks with the parameters of the predetermined recording waveform, and the first off-track amount OT1 is measured from the center of the test track. In the case where the shift amount in at least one track direction is defined as a positive direction, and the shift amount from the at least one track to the center direction of the test track is defined as a positive direction with respect to the second off-track amount OT2, OT1 +
More preferably, OT2> 0.

According to this method, test recording is performed under conditions where cross-erasing is likely to occur. Therefore, even if off-track occurs due to eccentricity of the disc during actual information recording,
Precise information signal recording can be maintained.

Further, a third optical information recording / reproducing method according to the present invention provides a method for recording / reproducing information on / from a rewritable optical information recording medium.
Record information signals as mark and space lengths,
The mark is recorded by at least one or more recording pulse trains whose power is switched between two or more types,
An optical information recording / reproducing method for performing test recording on a test track on the optical information recording medium before recording an information signal on the optical information recording medium, comprising: a first pulse edge position and a last pulse edge position; Recording a test signal on a test track at (e-
1) and after the step (e-1), recording the test signal on a track adjacent to at least one of the test tracks at the fixed first pulse edge position and the last pulse edge position (e-2). When,
Measuring the quality of the reproduction signal of the test track (e-3); and determining the first pulse edge position and the last pulse edge position based on the quality of the reproduction signal (e-4). It is characterized by.

According to this method, the position of the first pulse edge and the position of the last pulse edge are adjusted in a state including the influence of the cross erase, so that the shift of the edge position of the recording mark caused when the cross erase occurs is compensated for. Be recorded. As a result, an effect is obtained that information can be reproduced without errors and more precise recording of an information signal becomes possible.

In the third optical information recording / reproducing method according to the present invention, the recording of the information signal is continuously performed on a track of the optical information recording medium, and at least one information signal is recorded at the end of the information signal. It is more preferable to record a dummy information signal of the circumference or longer in that the cross erase state can be kept the same for any track.

Further, the first optical information recording / reproducing apparatus according to the present invention may be arranged such that a test track is recorded on a test track on the optical information recording medium before an information signal is recorded on the rewritable optical information recording medium. An optical information recording / reproducing apparatus for recording, comprising: a modulating means for modulating an information signal into a recording data signal; a test signal generating means for generating a test signal as a recording data signal; Recording signal generating means for converting into a recording pulse of a predetermined width; recording means for driving a laser based on the recording pulse to record either a test signal or an information signal on the optical information recording medium; Tracking servo control means for controlling tracking during recording and reproduction of an information signal; and a predetermined off-track Off-track amount applying means for applying an amount, and off-track amount determining means for reproducing the test signal recorded on the test track and determining an optimal off-track amount based on a measurement result of the reproduced test signal. The off-track amount applying unit performs off-tracking by a predetermined off-track amount, the recording unit records a test signal on a test track, and the off-track amount applying unit performs off-tracking by the predetermined off-track amount. The recording means records the test signal on at least one track adjacent to the test track, and then the off-track amount determining means reproduces the test signal recorded on the test track. Features.

According to this apparatus, an actual information signal can be recorded with an off-track amount which is least affected by cross-erase, and an effect that more precise recording of an information signal can be achieved is obtained.

Further, the second optical information recording / reproducing apparatus according to the present invention performs a test on a test track on the optical information recording medium before recording an information signal on the rewritable optical information recording medium. An optical information recording / reproducing apparatus for recording, comprising: a modulating means for modulating an information signal into a recording data signal; a test signal generating means for generating a test signal as a recording data signal; Recording signal generating means for converting into a recording pulse of a predetermined width, and recording means for driving a laser with a parameter of a predetermined recording waveform based on the recording pulse and recording either a test signal or an information signal on the optical information recording medium Reproducing the test signal recorded on the test track, and selecting an optimum recording waveform parameter based on the measurement result of the reproduced test signal. Recording waveform determining means for determining the test signal, and the recording means records the test signal on a test track, and the recording means records the test signal on a track adjacent to at least one of the test tracks using the parameters of the predetermined recording waveform. After recording the signal, the recording waveform determining means reproduces the test signal recorded on the test track.

According to this apparatus, an actual information signal can be recorded with an optimum recording waveform parameter with less influence of cross-erase, and an effect that a more precise information signal can be recorded is obtained.

In the second optical information recording / reproducing apparatus according to the present invention, tracking servo control means for controlling tracking during recording / reproduction of the test signal and the information signal; Off-track amount control means for applying an off-track amount, the off-track amount application means performing off-track by a first off-track amount OT1, and after the recording means records the test signal on a test track, The off-track amount applying means includes a second off-track amount OT2
The recording means records the test signal on at least one track adjacent to the test track with the parameters of the predetermined recording waveform, and for the first off-track amount OT1, The shift amount from the center of the test track in the direction of the at least one track is defined as a positive direction, and the shift amount from the at least one track toward the center of the test track from the at least one track is defined as the second off-track amount OT2. When defined as the positive direction, it is more preferable that OT1 + OT2> 0.

With this apparatus, test recording is performed under conditions that are likely to cause cross-erase. Therefore, even if off-track occurs due to eccentricity of the disk during actual information recording,
Precise information signal recording can be maintained.

Further, the third optical information recording / reproducing apparatus according to the present invention provides a method for testing a test track on an optical information recording medium before recording an information signal on the rewritable optical information recording medium. An optical information recording / reproducing apparatus for recording, comprising: a modulating means for modulating an information signal into a recording data signal; a test signal generating means for generating a test signal as a recording data signal; Recording signal generating means for converting a recording pulse into a recording pulse of a predetermined width; recording pulse edge adjusting means for adjusting a first pulse edge position and a last pulse edge position of the recording pulse; and the adjusted first pulse edge position and the last pulse edge A laser is driven based on the position and either a test signal or an information signal is sent to the optical information recording medium. Recording means for recording, and recording waveform determining means for reproducing the test signal recorded on the test track, and determining optimum first pulse edge position and last pulse edge position based on a measurement result of the reproduced test signal. The recording means records the test signal on a test track, and the recording means records the test signal on at least one track adjacent to the test track. The recorded test signal is reproduced.

This device adjusts the position of the first pulse edge and the position of the last pulse edge in a state including the influence of the cross erase, so that the deviation of the edge position of the recording mark caused when the cross erase occurs is compensated for. Be recorded. As a result, an effect is obtained that information can be reproduced without errors and more precise recording of an information signal becomes possible.

[0032]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described more specifically with reference to embodiments.

(Embodiment 1) This embodiment relates to a test recording performed for the purpose of obtaining an optimum off-track amount. FIG. 1 is a block diagram showing a schematic configuration of the recording / reproducing apparatus according to Embodiment 1 of the present invention. The basic configuration of the recording / reproducing apparatus according to the present embodiment will be described with reference to FIG.

The recording / reproducing apparatus includes a spindle motor 109 for rotating the optical disk 101, and an optical head 107 having a laser light source (not shown) for focusing a laser beam on a desired portion of the optical disk 101. The operation of the entire recording / reproducing apparatus is controlled by the system control circuit 102.

The recording / reproducing apparatus provides a tracking servo controller 108 for performing tracking control on the optical head 107 during recording / reproducing, and gives a predetermined off-track amount to the tracking servo controller. An off-track amount applying unit 113 for performing an off-track operation is provided.

The recording / reproducing apparatus includes a modulation section 104 which modulates recording information according to a predetermined modulation rule to generate a binarized recording data signal, and generates various test signals as recording data signals during test recording. Signal generator 10
3 is provided. Further, a recording signal generation unit 105 for generating a recording pulse in accordance with a recording data signal is provided. Further, a laser drive unit 106 for modulating a current for driving a laser light source in the optical head 107 based on a recording pulse is provided as a recording unit.

In the recording / reproducing apparatus, a reproduction signal processing unit 110 for performing waveform processing (equalizing or the like) of a reproduction signal based on light reflected from the optical disk 101 as an off-track amount determining means, Demodulation section 111 for demodulating reproduction information, BER of reproduction signal
(Also referred to as a bit error rate). And based on the measured BER value,
The determination of the optimum off-track amount is performed by the system control circuit 102.
Made in.

Next, the operation of the recording / reproducing apparatus shown in FIG. 1 will be described with reference to FIGS.

FIG. 2 is a flowchart showing the operation of the first embodiment of the present invention. FIG. 3 is a diagram showing a state of a recording mark recorded on a track in the present embodiment. In this embodiment, an information signal is recorded on a groove track.

At the time of test recording, first, the optical head 107 seeks a test track on the optical disk 101 (step 201), and the system control unit 102 sets an initial value of the off-track amount to the off-track amount applying unit 113. The tracking servo controller 1 is set based on the set value.
08 causes the optical head 107 to perform an off-track operation (step 202). This initial value is, for example, the minimum value of the variable range of the off-track amount.

Then, a test signal for determining the off-track amount is transmitted from the test signal generator 103 as a recording data signal. Here, the test signal is, for example, a random signal. This recording data signal is converted into a recording pulse by the recording signal generation unit 105, and the laser drive circuit 106 modulates the laser drive current and records it on the test track (step 203). The recording state on the test track at this time is as shown in FIG. 3A, and a recording mark is formed at a position shifted from the center of the track by the off-track amount OT.

Next, the track is moved to a track adjacent to the test track (step 204), and a test signal is similarly recorded (step 205). At this time, the recording state on the track is as shown in FIG. 3B. Also in this case, the recording mark is formed at a position shifted by the off-track amount OT. Move to another adjacent track (step 206) and record a test signal in the same manner (step 207). At this time, the recording state on the track is as shown in FIG. 3C, and the recording mark is formed at a position shifted by the off-track amount OT. Due to the recording of these adjacent tracks, the center test track is affected by the cross erase. Thereafter, the process returns to the test track (step 208).

After recording the test signal, the test track is reproduced by the optical head 109, and the reproduced signal is equalized and binarized by the reproduced signal processing section 110. The demodulation section 111 demodulates the reproduction information, and the BER measurement section 112 compares the information with the original test signal information to determine the bit error rate of the reproduction signal (step 209). The measured value of the bit error rate is stored in a memory in the system control circuit 102 (step 210). The off-track amount is increased stepwise (step 212), and
Steps up to 210 are repeated within the adjustment range of the off-track amount (step 211).

Then, the system controller 102 compares the value of the bit error rate with respect to each off-track amount (step 213). FIG. 4 is a graph showing the relationship between the off-track amount and the bit error rate. Here, the off-track amount at which the bit error rate is minimized is set as the optimum off-track amount for the tracking servo control unit 108 (step 214), and the test recording ends.
Note that the optimal off-track amount is a threshold B at which the BER is constant.
It may also be obtained as the value of the midpoint of the off-track amounts OTmin and OTmax that are equal to or less than ERth.

According to the above method, an actual information signal can be recorded with an off-track amount having the least influence of cross-erase.

As described above, in the optical information recording / reproducing method according to the present embodiment, the test signal is recorded on a plurality of tracks by changing the off-track amount, and the measured value of the bit error rate of the previously recorded track is obtained. The optimum off-track amount is determined based on the information, and the actual information signal is recorded. Therefore, the information signal can be recorded with the effect of cross-erasing minimized, and more precise recording of the information signal becomes possible. Excellent effects can be obtained.

In this embodiment, the case where the track is only the groove has been described. However, the present invention can be applied to the case where the optimum off-track amount is obtained for both the land and groove tracks. FIG. 3 shows the recording state on the test track and the adjacent track in this case.
FIG. 5C shows a state corresponding to FIG. 5 when the test track is a groove, and FIG. 6 when it is a land.
In each case, the off-track amount is given by OTG in the groove and by OTL in the land.

In such a case, the above-described test recording is performed by setting the off-track amount independently for the groove and the land, the BER is measured, and the optimum off-track amount is determined for each. . FIG. 7 is a contour diagram showing the relationship between the off-track amounts of grooves and lands and the BER. 7A shows a case where the test track is a groove, and FIG. 7B shows a case where the test track is a land.

FIG. 8A shows a recording state on a track when the off-track amount is changed in the same polarity direction between the land and the groove, and FIG. 8B shows a recording state on the track when the off-track amount is changed in the opposite polarity direction. .

Since the tracking polarity is reversed between the groove and the land, the polarity of the off-track amount is reversed. For example, when the off-track amount is positive in the groove and the track is off-track toward the outer periphery, the off-track amount is positive in the land and the track is off-track in the inner periphery. Therefore, when the off-track amount of the groove and the land is increased or decreased in the same polarity direction, the recording mark of the groove and the recording mark of the land come close to each other, so that the cross erase is remarkable and the BER is deteriorated.

On the other hand, when the off-track amount is changed in the opposite polarity direction, the recording marks on the groove and the recording marks on the land are off-track while keeping a substantially constant interval, so that the deterioration of BER due to cross erase is small. However, if the track is off-tracked to the vicinity of a so-called groove wall between the land and the groove, the BER deteriorates because the formation of the mark becomes unstable.

When the information signal is recorded on both the land and groove tracks in this manner, the land and the groove are obtained by using the relationship shown in FIGS. 7A and 7B obtained based on the test track measurement results. The off-track amount corresponding to the point where the BER becomes smaller in any of the test tracks with the groove is determined as the optimum off-track amount. Then, the information signal can be recorded with minimum influence of the cross erase on both the land and the groove, and an excellent effect can be obtained in that the information signal can be recorded more precisely.

In this embodiment, it is preferable that the obtained optimum off-track amount is stored in a predetermined area of the optical disk or a storage unit provided in the recording / reproducing apparatus. Further, at the time of test recording, it is preferable that the above-mentioned off-track amount is read from a predetermined area of the optical disk or a storage unit provided in the recording / reproducing apparatus and set as an initial value. According to this mode, test recording can be started from an initial value specific to an optical disc or a recording / reproducing device.
The optimum value can be obtained earlier, and the test recording can be completed in a shorter time.

In each of the embodiments of the present invention, the off-track amount is changed stepwise for every fixed number of sectors or every fixed number of tracks, and recording is performed at once, and the off-track amount is similarly recorded for the adjacent track. The amount may be recorded at a time, and then the BER for each of the above parameters may be measured at once by returning to the original track. This mode is more preferable because the time required for test recording can be further reduced.

(Embodiment 2) This embodiment relates to a test recording performed for the purpose of obtaining an optimum recording power. FIG. 9 is a block diagram showing a schematic configuration of a recording / reproducing apparatus according to Embodiment 2 of the present invention.

With the configuration of FIG. 9, FIG.
The difference from this is that a recording power setting unit 902 for setting the recording power for the laser driving unit is provided, and the recording power setting unit 90 controls the entire recording / reproducing apparatus.
System control section 9 for controlling the recording power and determining the optimum recording power
01 is provided.

Next, the operation of the recording / reproducing apparatus shown in FIG. 9 will be described with reference to FIGS. FIG. 10 is a flowchart showing the operation of the second embodiment of the present invention. FIG. 11 is a diagram showing a recording state on a track in the present embodiment.

At the time of test recording, first, the optical head 107 seeks a test track on the optical disk 101 (step 1001), and the system control unit 901 sets the initial value of the recording power in the recording power setting unit 902 and the off-track amount application unit 113. In step 1002, the off-track amount in the test track is determined. The initial value of the recording power is, for example, the minimum value of the variable range of the recording power. The off-track amount in the test track is OT1 in this embodiment. Here, OT1 represents the amount of deviation from the center of the test track as shown in FIG. 11A, and the direction to the next track on which a test signal is recorded later is defined as positive.

FIG. 12 shows the recording pulse train and the optical disc 1
Record mark 12 formed on track 1204 on track 01
05 is shown as an example. The recording pulse train includes a first pulse 1201, a sub pulse train 1202, and a last pulse 12
In this embodiment, the recording power level, which is the peak value of each pulse, is changed.

The test signal generator 103 sends out a test signal for determining the recording power as a recording data signal. Here, the test signal is, for example, a random signal. This recording data signal is converted into a recording pulse by the recording signal generation unit 105, and a laser driving circuit 106 modulates a laser driving current and records it on a test track (step 1).
003). The recording state on the test track at this time is as shown in FIG.

Next, the track is moved to a track adjacent to the test track (step 1004), and the off-track amount applying section 11 is moved.
3 is set to OT2 (step 1005), and a test signal is recorded similarly (step 1).
006). The recording state on the track at this time is shown in FIG.
The result is as shown in FIG. Here, OT2 is as shown in FIG.
As shown in (b), it indicates the amount of deviation from the center of the track adjacent to the test track, and the direction toward the test track is defined as positive.

At this time, the off-track amount is set to a direction approaching the original test track. That is, OT1 + OT
It is more preferable that 2> 0. this is,
Because test recording is performed under conditions that easily cause cross-erase, there is an advantage that accurate information signal recording can be maintained even if off-track occurs due to eccentricity of the disc during actual information recording. is there.

Then, the process returns to the original test track (step 1007), and the off-track amount is returned to the initial value (step 1008).

After the recording of the test signal, the corresponding track is reproduced by the optical head 107, and the reproduction signal processing unit 110 equalizes and binarizes the reproduction signal. The demodulation section 111 demodulates the reproduction information, and the BER measurement section 112 compares the information with the original test signal information to determine the bit error rate of the reproduction signal (step 1009). The measured value of the bit error rate is stored in a memory in the system control circuit 901 (step 1010). The recording power is increased stepwise (step 1012), and
Steps 03 to 1010 are repeated within the recording power adjustment range (step 1011).

Then, the system control unit 901 compares the bit error rate values for each recording power (step 1013). FIG. 13 is a graph showing the relationship between the recording power and the bit error rate. Further, the shapes of the recording marks formed on the recording tracks at the respective recording powers (a), (b) and (c) in the graph of FIG.
It is shown in FIG. In (a), the influence of the adjacent track is small because the mark formed with a low recording power is thin, but the jitter of the recording mark itself deteriorates, and as a result, the bit error rate deteriorates. In (c), since the recording power is high and the recording mark is thick, the jitter of the recording mark itself is good, but the influence of cross erase is large, so that after recording on an adjacent track, the jitter becomes worse and the bit error rate also worsens. (B) shows that the bit error rate is the best value because the jitter of the recording mark itself and the effect of the cross erase from the adjacent track are balanced.

The recording power setting unit 902 uses the recording power at which the bit error rate is minimized as the optimum recording power.
(Step 1014), and the test recording ends.

According to the above-described method, an actual information signal can be recorded with the recording power which is least affected by the cross erase. Note that the optimum recording powers are the recording powers Ppmin and Ppmax at which the BER is equal to or less than a certain threshold BERth.
May also be obtained as the value of the midpoint of.

As described above, in the optical information recording / reproducing method according to the present embodiment, the test signal is recorded on a plurality of tracks by changing the recording power, setting the off-track amount to increase the influence of the cross erase, and Since the actual information signal is recorded with the recording power that minimizes the bit error rate of the track recorded on the disc as the optimal recording power, the information signal can be recorded with the effect of cross-erase minimized, and more precise information can be recorded. An excellent effect is obtained in that the signal can be recorded.

Further, by recording the test track and the off-track of the adjacent track in a direction approaching each other, the test recording is performed under the condition that the cross erase is likely to occur. Even if off-track occurs due to eccentricity or the like, an excellent effect is obtained in that accurate information signal recording can be maintained.

In the present embodiment, the optimum recording power has been determined. However, as shown in FIG.
If 02 is provided, the optimum erasing power can be determined.

When recording with a recording pulse train as shown in FIG. 16, if an inter-sub-pulse power setting section 1702 is provided as shown in FIG. 17, an optimum inter-sub-pulse power can be determined. Here, the power between sub-pulses is between the first pulse 1601 and the sub-pulse 1602, between the sub-pulses 1602, and between the sub-pulses 1602.
And the last pulse 1603.

In the case of recording with a recording pulse train as shown in FIG. 18, if the sub-pulse duty setting section 1902 is provided as shown in FIG. 19, it is possible to determine the optimal sub-pulse duty. Here, the sub-pulse duty represents the ratio between the pulse width of the sub-pulse 1802 and the interval between the pulses.

In this embodiment, any one of the optimum recording power, erasing power, inter-sub-pulse power, and sub-pulse duty determined is stored in a predetermined area of the optical disk or a storage unit provided in the recording / reproducing apparatus. Is preferred. At the time of test recording, it is preferable that any one of the recording power, the erasing power, the power between sub-pulses, and the sub-pulse duty is read from a predetermined area of the optical disk or a storage unit provided in the recording / reproducing apparatus and set as an initial value. According to this embodiment, the test recording can be started from the initial value specific to the optical disc or the recording / reproducing device. Therefore, the optimum value can be obtained more quickly, and the test recording can be completed in a shorter time.

In each embodiment of the present invention, any one of the recording power, the erasing power, the power between sub-pulses, and the sub-pulse duty is changed stepwise for each of a fixed number of sectors or a fixed number of tracks. Record
Similarly, the off-track amount, the recording power, the erasing power, the power between sub-pulses, and the sub-pulse duty are recorded at once for the adjacent track, and then the BER for each of the above parameters is returned to the original track. The measurement may be performed at one time. This mode is more preferable because the time required for test recording can be further reduced.

(Embodiment 3) The present embodiment relates to a test recording which is performed for the purpose of determining each edge position of a recording pulse in a state including the influence of cross erase. FIG. 20 is a block diagram showing a schematic configuration of a recording / reproducing apparatus according to Embodiment 3 of the present invention.

The configuration of FIG. 20 differs from that of FIG. 1 in the first embodiment in that a recording pulse edge position adjustment for adjusting a first pulse edge position and a last pulse edge position with respect to a recording pulse from recording signal generating section 105 is performed. This is the point that the section 2002 is provided. The recording pulse edge adjusting unit 2002 may be a means for adjusting the edge position by changing the positions of the first pulse and the last pulse, or changing the leading edge position of the first pulse and the trailing edge position of the last pulse. Means for adjusting the edge position (in this case, the width of the first pulse and the width of the last pulse change, respectively) may be used.

Another feature is that an edge timing detector 2003 for detecting the timing of the front and rear edges of the reproduced signal is provided. Further, the system control unit 2001 controls the entire recording / reproducing apparatus, and also controls the recording pulse edge position adjustment unit 2002 to determine an optimum edge position.
Is provided.

Next, referring to FIGS. 21 and 22, FIG.
The operation of the recording / reproducing apparatus shown in FIG. FIG. 21 is a flowchart showing the operation of the present embodiment. FIG.
Is an example of a part of this embodiment.
FIG. 11 is a diagram for explaining an operation of obtaining a correction amount of a leading edge pulse edge position in a combination of a self mark length 3T (that is, one element of a mark-space combination table). Here, T represents a channel clock cycle.

In FIG. 22, (a) shows a test signal (recording data signal) waveform for determining a recording pulse edge position,
(B) is a recording pulse waveform for driving the laser, (c) is the state of the track after the recording pulse edge position test signal is recorded, and (d) is the state of the recording pulse edge position determination on the adjacent track. The state of the original track after the recording of the test signal is shown, (e) is a reproduced signal waveform when the original track is reproduced, and (f) is a binarized signal waveform of the reproduced signal.

At the time of test recording, first, the optical head 107 seeks to a predetermined test track on the optical disk 101 based on a command from the system control unit 2001 (step 2101). The system control circuit 2001 sets initial values of the first pulse edge position and the last pulse edge position (that is, values provided in the recording / reproducing apparatus in advance) in the recording pulse edge adjustment circuit 2002 (step 2102).

The test signal for determining the recording pulse edge position from the test signal generation unit 103 is supplied to the recording signal generation circuit 105.
Send to The recording pulse edge position determination test pattern signal is a recording data signal having a specific cycle corresponding to the adjustment of each element on the combination table. This signal waveform corresponds to FIG.

The recording signal generator 105 converts this recording data signal into a recording pulse train. Laser driver 106
FIG. 22 shows the state after the recording pulse edge adjusting unit 2002
Test recording is performed on a test track by modulating the laser drive current based on the recording pulse train as in (b) (step 2103). After recording, the state of the test track becomes as shown in FIG.
In 02, a recording mark 2203 is recorded.

Then, the track is moved to the next track of the test track (step 2104), a test signal is recorded similarly (step 2105), and the process returns to the original test track (step 2106). The state of the test track after the adjacent recording is as shown in FIG. The recording mark 2204 has been partially cut off for cross-erase.

After recording the recording pulse edge position determination test pattern signal, the optical head 107 reproduces the test track. The waveform of the reproduction signal is as shown in FIG. 22 (e), and the recording mark 2204 has been cut off. Therefore, in the reproduction signal, apparently, the front edge of the recording mark is later and the rear edge is earlier. It has a shifted waveform. The reproduction signal processing unit 110 performs equalization and binarization of the reproduction signal. The waveform after binarization is as shown in FIG. Then, the edge timing detection unit 2003
Slices the binarized signal, detects the signal inversion interval, and measures the recording mark edge interval (step 210)
7).

In the example shown in FIG. 22, the 2 shown in FIG.
The interval x between the rising timings of the digitized signal is measured.
The measured recording mark edge interval is stored in an edge interval accumulation memory in the system control circuit 2001. The system control circuit 2001 calculates the average of the measured values of the mark edge intervals stored in the memory (step 2108).

The difference between the average value of the mark edge interval and the edge interval of the test signal for determining the recording pulse edge position (ie, the signal inversion interval of the test pattern signal for determining the recording pulse edge position) (ie, the shift amount of the mark edge) is calculated. It is determined (step 2109). In the example of FIG. 21, a difference between x and 15T, which is an ideal signal inversion interval time, is calculated. Then, it is determined whether the difference is smaller than a predetermined value (step 2110). As the constant value in this case, for example, an adjustment unit time (that is, an adjustment step) of the first pulse edge position or the last pulse edge position in the recording pulse edge adjustment unit 2002 is used.

If the difference is larger than the predetermined value, the first pulse edge position or the last pulse edge position is determined based on the difference, and the determined edge position is set in the recording pulse edge adjustment unit 2002 (step 2111). In the example of FIG. 22, the 3T recording pulse 220
A first edge position is determined (in this example, the 3T recording pulse has a form in which the first pulse and the last pulse are overlapped and recorded by a single pulse).
Then, the process from step 2103 is repeated again.

When the difference is smaller than the predetermined value, it means that the first pulse edge position or the last pulse edge position set by the recording pulse edge adjusting unit 2002 is closest to a desired position. Therefore, the system control circuit 2001 uses the edge position being set (in the example of FIG. 21, the element of the first pulse edge position in the combination table of the preceding space length 5T-self-mark length 3T) as edge position information in the system control circuit 2001. The data is registered in the table registration memory (step 2112), and the test recording for the elements of the combination table is completed.

Then, the test pattern signal is switched to the recording pulse edge position determination test pattern signal corresponding to the element of the next combination table (step 2113), and step 21 is performed again.
Steps from 02 are repeated. Steps 2102 to 201 for all combinations table elements
It is determined whether or not Step 3 has been repeated (Step 211).
4) After the setting and registration of the edge position are completed for all the elements, the test recording ends.

Thereafter, when an information signal is actually recorded, a recording pulse is generated based on the information signal passed through the modulator 104. Then, the recording pulse edge adjusting unit 2002
Recording is performed in accordance with the first pulse edge position and the last pulse edge position set in the step (1).

Recording of information on the disk is performed continuously from the innermost circumference or the outermost circumference of the data recording area on the disk. Then, the track for reproducing information is always reproduced under the influence of the cross erase from the next track. However, in this embodiment, since the edge position of the first pulse and the edge position of the last pulse are already compensated for in the test recording in a state including the influence of the cross erase, the recording mark is formed on the track at the ideal edge position. As a result, information can be reproduced without errors.

In this embodiment, each edge position of the recording pulse is set including the influence of the cross erase.
Therefore, when information is recorded continuously, the last track does not include the influence of the cross erase, and the edge position of the recording mark is shifted from the optimum position.
This problem can be dealt with as follows. That is, when actually recording information, if a dummy information signal of at least one turn is recorded at the end of the information signal,
The cross erase is also performed for the last track on which information has been recorded. Therefore, the state of the cross erase can be kept the same for the last track, which is a more preferable form in that the reproduction can be performed without error.

As described above, in the optical information recording / reproducing method according to the present embodiment, the position of the first pulse edge and the position of the last pulse edge are adjusted under the influence of the cross erase, so that the cross erase occurs. The recording is performed in a state where the shift of the edge position of the recording mark which occurs in the case is compensated. As a result, an excellent effect can be obtained in that information can be reproduced without error and more precise recording of an information signal becomes possible.

In this embodiment, it is preferable to store either the optimum first pulse edge position or the last pulse edge position thus obtained in a predetermined area of the optical disk or in a storage unit provided in the recording / reproducing apparatus. At the time of test recording, it is preferable that one of the first pulse edge position and the last pulse edge position is read from a predetermined area of the optical disk or a storage unit provided in the recording / reproducing apparatus and set as an initial value. According to this mode, test recording can be started from an initial value specific to an optical disc or a recording / reproducing device.
The optimum value can be obtained earlier, and the test recording can be completed in a shorter time.

In each of the embodiments of the present invention, either the first pulse edge position or the last pulse edge position is changed stepwise for each of a fixed number of sectors or for a fixed number of tracks, and recording is performed at one time. Similarly, one of the first pulse edge position and the last pulse edge position is recorded at a time in the same track, and then the BER for each of the above parameters is measured at a time by returning to the original track. good. This mode is more preferable because the time required for test recording can be further reduced.

In the first and second embodiments of the present invention, the bit error rate of the cross-erased track is measured by the BER measuring unit.
A jitter measuring unit may be provided instead of the measuring unit to measure the jitter of the test track. Further, a single cycle signal may be used as a test signal instead of a random pattern, and a reproduction signal amplitude measurement unit may be provided instead of the BER measurement unit to measure the reproduction signal amplitude of the test track. Any means may be used as long as the quality of the reproduced signal can be measured.

In the present embodiment, the edge timing of the recording mark is measured by the edge timing detection circuit, and the measured edge interval is accumulated and the average value is calculated by the system control circuit. May be performed by a measuring device outside the present recording / reproducing apparatus, such as a time interval analyzer.

[0098] In the first embodiment of the present invention,
The test recording is performed on the tracks on both sides of the track for measuring the reproduction signal quality, but may be performed on one track.

Similarly, in Embodiments 2 and 3 of the present invention, test recording was performed on one side, but it may be performed on both sides. However, in the third embodiment, when information is recorded on the disk continuously from the innermost circumference or the outermost circumference of the data recording area on the disk, it is preferable to perform test recording only on one (ie, next) track. This is more preferable because test recording can be performed in the same state as actual information recording.

In each embodiment of the present invention, any one of the obtained optimum off-track amount, recording power, power between sub-pulses, sub-pulse duty, first pulse edge position, and last pulse edge position is determined in a predetermined area of the optical disk. Alternatively, the information is preferably stored in a storage unit provided in the recording / reproducing apparatus. During test recording, the off-track amount, the recording power, the power between sub-pulses, the sub-pulse duty, the first pulse edge position, and the last pulse edge position are stored in a predetermined area of the optical disk or a storage unit provided in the recording / reproducing apparatus. It is preferable to read and set the initial value. According to this embodiment, the test recording can be started from the initial value specific to the optical disc or the recording / reproducing device. Therefore, the optimum value can be obtained more quickly, and the test recording can be completed in a shorter time.

In each of the above embodiments, a test signal generation circuit is provided for generating a test signal. However, a signal generated by modulating a specific information signal from the system control circuit and modulated may be used as the test signal. This allows
Since there is no need to provide a separate test signal generation circuit,
The size of the device can be reduced. Further, an error correction code may be added to this test signal or an interleave process may be performed.

The above-mentioned method can be applied to any of the above-mentioned optical disks as long as the medium has different optical characteristics between a recording mark and a non-mark portion (space portion), such as a phase change material, a magneto-optical material, a coloring material and the like. Can be.

The above modulation method, the length of each pulse,
The position, the cycle of the test pattern signal, and the like are not limited to those described in the present embodiment, and it is needless to say that appropriate ones can be set according to the recording conditions and the medium.

[0104]

As described above, according to the optical information recording method of the present invention, the test signal is recorded on a plurality of tracks by changing the off-track amount, and the bit error rate of the previously recorded track is reduced. Since the actual information signal is recorded with the minimum off-track amount as the optimal off-track amount, the information signal can be recorded with the influence of cross erase minimized, and more precise recording of the information signal becomes possible. .

Further, according to the optical information recording method of the present invention, the recording power is changed so that the test signal is recorded on a plurality of tracks at an off-track amount at which the influence of the cross erase becomes large, and the previously recorded track is recorded. Since the actual information signal is recorded with the recording power that minimizes the bit error rate as the optimal recording power, the information signal can be recorded with the effect of cross erase minimized, and more precise information signal recording is possible. become.

According to the optical information recording method of the present invention, a test signal is recorded on a plurality of tracks by changing the power between sub-pulses, and the power between sub-pulses at which the bit error rate of the previously recorded track is minimized. Since the optimum amount of off-track and the actual information signal are recorded, the information signal can be recorded with the influence of the cross erase being minimized, and more precise recording of the information signal becomes possible.

According to the optical information recording method of the present invention, the test signal is recorded on a plurality of tracks by changing the sub-pulse duty, and the sub-pulse duty at which the bit error rate of the previously recorded track is minimized. Since the optimum amount of off-track and the actual information signal are recorded, the information signal can be recorded with the influence of the cross erase being minimized, and more precise recording of the information signal becomes possible.

Further, according to the optical information recording method of the present invention, the position of the first pulse edge and the position of the last pulse edge are adjusted in a state including the influence of the cross erase. Recording is performed in a state where the deviation of the edge position is compensated. As a result, information can be reproduced without error, and more precise recording of an information signal becomes possible.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a recording / reproducing apparatus according to Embodiment 1 of the present invention.

FIG. 2 is a flowchart for explaining the operation of the recording and reproducing apparatus according to the first embodiment;

FIG. 3 is a diagram showing a recording state on a track according to the first embodiment;

FIG. 4 is a diagram showing a relationship between an off-track amount and a bit error rate according to the first embodiment.

FIG. 5 is a diagram showing a recording state on a track according to the first alternative embodiment;

FIG. 6 is a diagram showing a recording state on a track according to the first alternative embodiment;

FIG. 7 is a diagram showing a relationship between an off-track amount and a bit error rate according to the first alternative embodiment.

FIG. 8 is a diagram showing a recording state on a track according to the first alternative embodiment;

FIG. 9 is a block diagram showing a configuration of a recording / reproducing apparatus according to Embodiment 2 of the present invention.

FIG. 10 is a flowchart illustrating the operation of the recording / reproducing apparatus according to the second embodiment.

FIG. 11 is a diagram showing a recording state on a track according to the second embodiment.

FIG. 12 is a diagram illustrating (a) a part of a waveform of a test signal transmitted as a recording data signal, and (b) a state of a recording mark on a track after recording with the recording data signal; Diagram shown

FIG. 13 is a diagram showing a relationship between recording power and a bit error rate according to the second embodiment.

FIG. 14 is a diagram showing a relationship between a recording power and a recording mark shape in the second embodiment.

FIG. 15 is a block diagram showing a configuration of a recording / reproducing apparatus according to the second alternative embodiment.

FIG. 16 is a diagram illustrating a part of a waveform of a test signal transmitted as a recording data signal according to the second alternative embodiment; and (b) a recording mark on a track after recording with the recording data signal. Diagram showing the state of

FIG. 17 is a block diagram showing a configuration of a recording / reproducing apparatus according to the second alternative embodiment.

FIG. 18 is a diagram illustrating a part of a waveform of a test signal transmitted as a recording data signal in the second alternative embodiment; FIG. 18B is a diagram illustrating a recording mark on a track after recording with the recording data signal; Diagram showing the state of

FIG. 19 is a block diagram showing a configuration of a recording / reproducing device according to the second alternative embodiment.

FIG. 20 is a block diagram showing a configuration of a recording / reproducing apparatus according to Embodiment 3 of the present invention.

FIG. 21 is a flowchart for explaining the operation of the recording and reproducing apparatus according to the third embodiment;

FIGS. 22A and 22B are explanatory diagrams showing an example of correcting a first pulse edge position in the third embodiment. FIG. 22A shows a waveform of a test signal (recording data signal) for determining a recording pulse edge position. FIG. A diagram showing a recording pulse waveform. (C) A diagram showing a state of a track after the recording pulse edge position determining test signal is recorded. (D) A recording pulse edge position determining test signal is also recorded on an adjacent track. (E) A diagram showing a reproduced signal waveform when the original track is reproduced (f) A diagram showing a binarized signal waveform of the reproduced signal

[Explanation of symbols]

101 optical disk 102,901,1501,1701,1901,20
01 System control circuit 103 Test signal generation unit 104 Modulation unit 105 Recording signal generation unit 106 Laser driving circuit 107 Optical head 108 Tracking servo control unit 109 Spindle motor 110 Reproduction signal processing unit 111 Demodulation unit 112 BER measurement unit 113 Off-track amount application setting Unit 902 Recording power setting unit 601, 1201, 1601, 1801 First pulse 602, 1202, 1602, 1802 Sub pulse 603, 1203, 1603, 1803 Last pulse 801, 1204, 1604, 1804, 2202 Track 302, 502, 802, 1102 1205,140
2, 1605, 1805, 2203 Recording mark 301, 501, 1101, 1401, 2022 Test track 303, 503, 1103, 1403, 2205 Adjacent track 1502 Erasing power setting section 1702 Inter-sub-pulse power setting section 1902 Sub-pulse duty setting section 2002 Recording Pulse edge adjustment circuit 2003 Edge timing detector 2201 3T recording pulse 2204 Cross erased recording mark

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Tetsuya Akiyama 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F term (reference) 5D090 AA01 BB05 CC06 EE07 FF02 FF45 JJ12 5D118 AA18 BA01 BB05 BF03 CA13 CB01 CD11

Claims (35)

[Claims] 1. An optical information recording / reproducing method for performing test recording on a test track on an optical information recording medium before recording an information signal on the rewritable optical information recording medium, comprising: (A-1) recording a test signal on a test track by off-tracking by the track amount; and after the step (a-1), off-tracking by the off-track amount to at least one of the test tracks (A-2) recording the test signal on the track next to the step (a-2), measuring the quality of the reproduction signal of the test track (a-3), and A step (a-4) of determining an off-track amount. 2. The test signal is recorded by changing the amount of off-track for each of a plurality of sectors or tracks, and the test signal is recorded off-track by the amount of off-track to a track adjacent to at least one of the sector or the track. The optical system according to claim 1, wherein the test signal is recorded, a quality of a reproduction signal of the sector or the track is measured, and an optimal off-track amount is determined based on the quality of the reproduction signal. Information recording and playback method. 3. The optical information recording / reproducing method according to claim 1, wherein the determined value of the optimum off-track amount is recorded in a specific area of the optical information recording medium. . 4. The method according to claim 3, wherein, prior to performing test recording, the off-track amount is read from a specific area of the optical information recording medium and used as an initial value of the test recording. Optical information recording and reproducing method. 5. An optical information recording / reproducing apparatus for performing test recording on a test track on an optical information recording medium before recording an information signal on the rewritable optical information recording medium, comprising: A modulating means for modulating a recording data signal; a test signal generating means for generating a test signal as a recording data signal; a recording signal generating means for converting the recording data signal into recording pulses of a predetermined number and a predetermined width; A recording unit that drives a laser based on a recording pulse and records either a test signal or an information signal on the optical information recording medium; a tracking servo control unit that controls tracking during recording and reproduction of the test signal and the information signal; An off-track amount applying means for applying a predetermined off-track amount to the tracking servo control means; An off-track amount determining unit that reproduces the test signal recorded on the track and determines an optimal amount of off-track based on the measurement result of the reproduced test signal; The recording unit records off-track by a track amount, the recording unit records a test signal on a test track, the off-track amount applying unit performs off-track by the predetermined off-track amount, and the recording unit performs at least one of the test tracks. An optical information recording / reproducing apparatus, characterized in that the off-track amount determining means reproduces the test signal recorded on the test track after recording the test signal on a track next to the optical disc. 6. The optical information recording / reproducing apparatus according to claim 5, wherein the determined value of the optimum off-track amount is stored in a storage means of the optical information recording apparatus. 7. The test recording method according to claim 6, wherein the off-track amount is read from a storage means of the optical information recording device and set as an initial value of the test recording before performing the test recording. Optical information recording and reproducing apparatus. 8. The test recording is performed when the apparatus is adjusted, and when the apparatus is used after the test recording, the optimum off-track amount determined by the test recording is read out from the storage means of the optical information recording apparatus. 7. An off-track amount is set and information is recorded and reproduced.
An optical information recording / reproducing apparatus according to claim 1. 9. An optical information recording / reproducing method for performing test recording on a test track on the optical information recording medium before recording an information signal on the rewritable optical information recording medium, the test track comprising: (B-1) recording a test signal with a parameter of a predetermined recording waveform at a time after the step (b-1). Step of recording test signal (b-2)
Measuring the quality of the reproduction signal of the test track (b-3); and determining the optimum parameter of the recording waveform based on the quality of the reproduction signal (b-4). An optical information recording / reproducing method characterized in that: 10. A step (b-1) is performed by off-tracking by a first off-track amount OT1, and a test signal is recorded on the test track with a predetermined recording waveform parameter. 2 off-track amount OT2, the test signal is recorded on at least one of the test tracks next to the test track with the parameters of the predetermined recording waveform, and the test is performed for the first off-track amount OT1. A shift amount from the center of the track in the at least one track direction is defined as a positive direction, and a shift amount from the at least one track in the test track direction with respect to the second off-track amount OT2 is defined as a positive direction. 10. The optical information recording / reproducing method according to claim 9, wherein OT1 + OT2> 0. 11. The test signal is recorded by changing a parameter of the recording waveform for each of a plurality of sectors or tracks, and the test signal is recorded on a track adjacent to at least one of the sector or the track using the parameter of the recording waveform. 11. The quality of a reproduction signal of the sector or the track is measured, and an optimum parameter of a recording waveform is determined based on the measurement result of the reproduction signal. 12.
2. The optical information recording / reproducing method according to item 1. 12. An information signal is recorded as the length of a mark and a space, and the mark is recorded by at least one or more recording pulse trains whose power is switched between at least two types of recording power and erasing power. 12. The optical information recording method according to claim 10, wherein the parameter of the recording waveform is recording power. 13. An information signal is recorded as the length of a mark and a space, and the mark is recorded by at least one or more recording pulse trains whose power is switched between at least two types of recording power and erasing power. 12. The optical information recording method according to claim 10, wherein a parameter of the recording waveform is an erasing power. 14. An information signal is recorded as the length of a mark and a space.
12. Recording is performed with at least one or more recording pulse trains in which the power is switched between at least three types of inter-sub-pulse power, wherein the parameter of the recording waveform is inter-sub-pulse power. The optical information recording method according to claim 1. 15. An information signal is recorded as the length of a mark and a space, and said mark is recorded by at least one or more recording pulse trains whose power is switched between at least two types of recording power and erasing power. 12. The optical information recording method according to claim 9, wherein a parameter of the recording waveform is a sub-pulse duty. 16. The optical recording medium according to claim 9, wherein the parameter values of the determined optimum recording waveform are recorded in a specific area of the optical information recording medium. Optical information recording / reproducing method. 17. The method according to claim 1, wherein prior to performing the test recording, a value of the parameter of the recording waveform is read from a specific area of the optical information recording medium and set as an initial value of the test recording. 16. The optical information recording / reproducing method according to item 16. 18. An optical information recording / reproducing apparatus for performing test recording on a test track on an optical information recording medium before recording an information signal on the rewritable optical information recording medium, comprising: A modulating means for modulating a recording data signal; a test signal generating means for generating a test signal as a recording data signal; a recording signal generating means for converting the recording data signal into recording pulses of a predetermined number and a predetermined width; Recording means for driving a laser with a predetermined recording waveform parameter based on a recording pulse to record either a test signal or an information signal on the optical information recording medium; and reproducing the test signal recorded on the test track. Recording waveform determining means for determining an optimum recording waveform parameter based on the measurement result of the reproduced test signal, Means for recording the test signal on a test track, and the recording means for recording the test signal on a track adjacent to at least one of the test tracks with the parameters of the predetermined recording waveform. An optical information recording / reproducing apparatus for reproducing the test signal recorded on a test track. 19. A tracking servo control means for controlling tracking when recording and reproducing the test signal and the information signal, and an off-track amount control means for applying a predetermined off-track amount to the tracking servo control means, The off-track amount applying means includes a first off-track amount O
After off-tracking at T1, the recording means records the test signal on a test track.
Off-tracking at T2, the recording means records the test signal on at least one track adjacent to the test track with the parameter of the predetermined recording waveform, and the first off-track amount OT1 A shift amount from the center of the test track in the direction of the at least one track is defined as a positive direction; The optical information recording / reproducing apparatus according to claim 18, wherein OT1 + OT2> 0 when is defined as a positive direction. 20. An information signal is recorded as the length of a mark and a space, and the mark is recorded by at least one or more recording pulse trains whose power is switched between at least two types of recording power and erasing power. 20. The optical information recording / reproducing apparatus according to claim 19, further comprising: recording power setting means for setting a predetermined recording power at the time of recording by the recording means, wherein the parameter of the recording waveform is recording power. 21. An information signal is recorded as a mark and a space length, and said mark is recorded by at least one or more recording pulse trains whose power is switched between at least two types of recording power and erasing power. 20. The optical information recording / reproducing apparatus according to claim 19, further comprising: erasing power setting means for setting a predetermined erasing power at the time of recording by the recording means, wherein the parameter of the recording waveform is erasing power. 22. An information signal is recorded as the length of a mark and a space, wherein the mark has a recording power, an erasing power,
Recording at least one or more recording pulse trains in which the power is switched between at least three types of inter-sub-pulse power, and comprising a predetermined inter-sub-pulse power setting means for setting a predetermined inter-sub-pulse power during recording by the recording means; 20. The optical information recording / reproducing apparatus according to claim 18, wherein the parameter of the recording waveform is an erasing power. 23. An information signal is recorded as a mark and a space length, and said mark is recorded by at least one or more recording pulse trains whose power is switched between at least two kinds of recording power and erasing power. 20. The optical information according to claim 18, further comprising: a sub-pulse duty setting unit configured to set a predetermined sub-pulse duty at the time of recording by the recording unit, wherein a parameter of the recording waveform is a sub-pulse duty. Recording and playback device. 24. The optical information recording apparatus according to claim 18, wherein the determined value of the optimum off-track amount is stored in a storage unit of the optical information recording device.
Item 6. The optical information recording / reproducing device according to Item 1. 25. An apparatus according to claim 24, wherein, prior to performing test recording, said off-track amount is read from a storage means of said optical information recording apparatus and used as an initial value of said test recording. Optical information recording and reproducing apparatus. 26. An information signal is recorded as a mark and a space length on a rewritable optical information recording medium, and the mark is composed of at least one recording pulse train whose power is switched between two or more types. An optical information recording / reproducing method for recording a test track on a test track on the optical information recording medium before recording an information signal on the optical information recording medium, comprising: (E-1) recording a test signal on a test track at a position and a last pulse edge position; and after the step (e-1), the test track is recorded at the constant first pulse edge position and the last pulse edge position. (E-2) recording the test signal on at least one adjacent track; (E-3) measuring the quality of the reproduced signal of the disc, and determining (e-4) the first pulse edge position and the last pulse edge position based on the quality of the reproduced signal. Characteristic optical information recording / reproducing method. 27. The test signal is recorded by changing the first pulse edge position and the last pulse edge position for each of a plurality of sectors or tracks, and the sector or the track is recorded at the first pulse edge position and the last pulse edge position. The test signal is recorded on at least one adjacent track, the quality of the reproduction signal of the sector or the track is measured, and the first pulse edge position and the last pulse edge position where the reproduction signal quality is the best and the optimal first pulse are determined. 27. The optical information recording / reproducing method according to claim 26, wherein the position is determined as an edge position and a last pulse edge position. 28. The optical disk according to claim 26, wherein the determined values of the optimum first pulse edge position and last pulse edge position are recorded in a specific area of the optical information recording medium. Optical information recording / reproducing method. 29. Prior to performing test recording, the first pulse edge position and the last pulse edge position are read from a specific area of the optical information recording medium and set as initial values of the test recording. The optical information recording / reproducing method according to claim 28. 30. The recording of a test signal is performed on two tracks of the test track, the test track, and the next track, and the recording of the information signal is performed from the innermost circumference or the outermost circumference of the optical information recording medium to the track. The optical information recording / reproducing method according to claim 26 or 27, wherein the method is performed continuously. 31. The optical information recording method according to claim 30, wherein at least one round of a dummy information signal is recorded at the end of the information signal. 32. An optical information recording / reproducing apparatus for performing test recording on a test track on an optical information recording medium before recording an information signal on the rewritable optical information recording medium, comprising: A modulating means for modulating a recording data signal; a test signal generating means for generating a test signal as a recording data signal; a recording signal generating means for converting the recording data signal into recording pulses of a predetermined number and a predetermined width; Recording pulse edge adjusting means for adjusting a first pulse edge position and a last pulse edge position of a recording pulse; and driving a laser on the basis of the adjusted first pulse edge position and the last pulse edge position to record on the optical information recording medium. Recording means for recording either a test signal or an information signal; Reproducing the reproduced test signal, and determining the optimum first pulse edge position and the last pulse edge position based on the measurement result of the reproduced test signal. After recording the test signal, the recording unit records the test signal on at least one track adjacent to the test track, and then the recording waveform determination unit reproduces the test signal recorded on the test track. An optical information recording / reproducing device, characterized in that: 33. The optical system according to claim 32, wherein the determined values of the optimum first pulse edge position and last pulse edge position are stored in a storage means of the optical information recording device. Information recording and playback device. 34. Prior to performing test recording, the first pulse edge position and the last pulse edge position are read from storage means of the optical information recording device and set as initial values of the test recording. 34. The optical information recording / reproducing apparatus according to claim 33, wherein: 35. An optical information recording / reproducing method for recording an information signal on a rewritable optical information recording medium, wherein the recording of the information signal is performed continuously on tracks of the optical information recording medium. An optical information recording method, comprising recording at least one round of a dummy information signal at the end of the information signal.