JP2003208717A - Information recording apparatus and information recording method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To safely write information to a recording medium after interruption by appropriating control of interruption and restart for continuing information writing to the writable recording medium so as to reduce the effect of misdetection. <P>SOLUTION: In writing information onto a recording medium 2, a write control means 4 specifies a write interrupt condition and temporarily interrupts write operations of the information to the recording medium 2 when the interrupt condition is satisfied. The control means 4 specifies a restart condition for restarting the write operations for continuing information writing after that depending on the interrupt condition and restarts writing of the information onto the recording medium 2 when the restart condition is satisfied. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for appropriately writing and writing information on a writable recording medium, and there is a possibility that writing cannot be continued due to an impact on the device. If it is high, it belongs to the technical field of temporarily stopping the writing process and restarting the writing process after the cause of interruption is eliminated.

[0002]

2. Description of the Related Art Various types of optical writable recording media are known. For example, sequential writing (CD-R, CD-RW, DVD-R) can be performed at a stroke.
Etc.) can be mentioned. A drive device using this type of recording medium is configured so that even if writing to the recording medium is temporarily interrupted due to some interruption cause, writing can be resumed thereafter.

For example, in an optical head used for recording and reproducing a signal on a recording medium, an error signal (focus error signal or tracking error signal) for servo control of an objective lens driving mechanism (so-called biaxial device or biaxial actuator) is used. Various methods have been proposed for monitoring and detecting the timing of recording interruption, and determining the interruption of writing from the change in the status of the error signal when the cause of interruption occurs.

[0004]

However, in the conventional device, the resumption condition for the write connection is defined regardless of the write interruption condition.
Although there is a high possibility of erroneous detection, there is a problem in that interruption and resumption are independently determined, and as a result, inconvenience such as unnecessarily necessary writing connection is performed.

Therefore, the present invention optimizes the control of interruption and resumption for writing and writing information to a writable recording medium, so that writing after interruption can be performed safely and erroneous detection is performed. The challenge is to reduce the effect of.

[0006]

According to the present invention, in order to solve the above-mentioned problems, when writing information on a recording medium, the write control means defines a write interruption condition and the write interrupt means meets the condition. In addition, the write control means defines the restart condition for temporarily suspending the operation of writing information to the recording medium and restarting the write operation for subsequent writing of information according to the interrupt condition. When the conditions are met, writing of information on the recording medium is restarted.

According to the present invention, since the resumption condition is defined according to the interruption condition of the writing, it is possible to safely resume the writing operation for the connection of writing, and the unnecessary writing due to the erroneous detection. It is possible to prevent ties.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to an information recording apparatus and an information recording method, and relates to a writable recording medium and stores information that is continuous in time series over a predetermined section on the recording medium. It can be applied when writing. It should be noted that application to a recording medium that is sectorized and has a spare area prepared is not conceivable, but the present invention is effective in a drive device for a sequential write-type recording medium including a write-once type.

FIG. 1 is a conceptual explanatory view of an information recording apparatus 1 according to the present invention.

"DR" shown in the figure represents writing data (or recording data) with respect to the recording medium 2, and the data is sent to the writing processing means 3 and then the recording medium 2 is efficiently processed by the means. Processing is performed so that the signal can be recorded well. The recording medium is, for example, CD-R (Compact Disk-Recordable) or CD-RW.
(Compact Disk-ReWritable), DVD-R (Digital Versat
ile Disk-Recordable).

The write control means 4 is provided to control the recording of information on the recording medium 2 and the operation of connecting and writing information by a control command to the write processing means 3. Then, receiving various detection signals from the detection means 5,
It judges whether the writing is suspended or resumed, and sends a control command according to the judgment result to the writing processing means 3. That is, when the information is written in the recording medium 2, the write control means 4 defines the interrupting condition of the writing, and when the control state or the detection condition matches the condition, the writing of the information in the recording medium 2 is performed. Temporarily suspend the operation. Further, the resumption condition for resuming the writing operation for subsequent writing of information is also defined by the writing control means 4 in accordance with the interruption condition, and when the control state or the detection state matches the condition, the recording medium The control for restarting the writing of information to the No. 2 is performed.

Regarding the detecting means 5, for example, detecting means for detecting that a transient disturbance including impact is applied to the device, or writing of information to the recording medium 2 due to a factor other than the disturbance. There is a detection means for detecting that the performance or the reading performance has deteriorated. For example, after the interruption when the deterioration of the writing performance is detected, the writing speed is reduced and the writing is restarted (the details will be described later. Yes.).

FIG. 2 shows an example of the configuration when the present invention is applied to an optical disk drive device.

In the recording / reproducing apparatus 6, information recorded on the optical disk 7 is recorded in the head portion (or optical pickup) 8 of the optical disk 7.
After being read by the analog signal processing unit 9, the analog signal processing unit 9 performs necessary processing and then sends the digital signal processing unit 10. In this example, the analog signal processing unit 9 is
It is configured by using an F (Radio Frequency) signal processing IC.

The digital signal processing section 10 uses a logic IC 11 including an encoder (ENC), a decoder (DEC), a digital signal processor (DSP), etc., and constitutes the write processing means 3. The logic IC 11 is under the control of a CPU (Central Processing Unit) 12.

The laser drive unit 13 modulates the intensity of the laser beam by the recording signal and sends the control output to the laser light source in the head unit 8. Incidentally, a light detecting means for monitoring the intensity of the laser beam is provided in the head portion 8.

An interruption / resumption processing unit 14 is provided for the digital signal processing unit 10, which constitutes the write control means 4 together with the CPU 12. A buffer underrun detection unit 15, a shock detection unit 16, and a read / write performance detection unit 17 are provided as units corresponding to the detection unit 5, and a detection signal obtained by each detection unit is interrupted and restarted. Sent to section 14.

The buffer underrun detector 15 detects a so-called buffer underrun when a buffer memory (not shown) for data storage is empty at the time of writing information on the optical disk 7. It is to detect whether or not it has occurred, and when the interruption / resumption processing unit 14 knows that the state is detected,
The writing operation on the optical disk 7 is temporarily interrupted, and the writing operation is restarted when a predetermined amount of data is accumulated in the buffer memory.

The shock detector 16 is provided to detect a shock applied to the recording / reproducing device 6, and a shock detecting sensor is used.

Further, the reading / writing performance detecting section 1
Reference numeral 7 detects the information reading performance from the optical disc 7 and the information writing performance with respect to the optical disc. Information necessary for determining the quality of the performance (described in detail later) is stored in the interruption / resumption processing unit 14. Be notified.

A servo is used for driving control of the spindle motor 18 constituting the rotating means of the optical disk 7 (including speed change control relating to rotational speed) and movement (feed) control of the head portion 8 (so-called thread control). A control unit 19 is provided.

Further, a mechanism and a circuit necessary for focus control and tracking control for causing the beam spot to follow the track to the original position with respect to the surface wobbling of the optical disk and the eccentricity of the recording track are provided. In focus control, a photodetector in the head unit 8 detects a focus error signal (so-called focus error signal), and in tracking control, the head unit 8
An out-of-track error signal (so-called tracking error signal) is detected by a photodetector inside. In the present example, these error signals are output by the DSP 11 in the logic IC 11.
a is A / D (analog / digital) converted and taken in, and a servo control signal based on the error signal is generated and supplied to the coil section in the head section 8 (that is, the servo control signal). Drives the objective lens 2
By supplying the focus coil and the tracking coil, which are provided in the axial device, respectively, position adjustment and attitude control of the objective lens with respect to the optical disc are performed. ).

With respect to the above configuration, first, in the case where a writable optical disc receives a shock to the extent that writing cannot be continued, at that time, the interruption / resumption processing unit 14 positively stops writing. At the same time, a technique for restarting writing after the state is stabilized will be described.

The basic technique for suspending and resuming writing is known as the above-mentioned writing connection at the time of occurrence of buffer underrun and a technique related thereto, and therefore the description thereof is omitted. A description will be given centering on error prevention technology at the time of impact.

As a measure for determining interruption of writing information to the recording medium and safely restarting writing, for example, the following modes can be given.

(1) A form using a servo error signal (2) A form using a signal serving as an index of reading performance and a writing performance (3) A form using an impact sensor together.

First, in the above-mentioned mode (1), the servo error signal is used to judge the condition of interruption and resumption, and a change or an abnormal change in the signal state is monitored. For example, deviation from the permissible range of the amplitude of the servo error signal (so-called servo ramp-up) is used as the interruption condition, or the amplitude and the number and frequency of fluctuations of the signal are used as the restart conditions, and the conditions are met. If so, the rotation of the disk is slowed down and writing is restarted. Alternatively, there is a method of optimizing the writing speed in accordance with the amplitude value or fluctuation of the servo error signal. For example, a resuming condition according to the detection level of the servo error signal is imposed, and the writing speed is controlled by gradually or continuously decelerating the number of revolutions of the disk, or a predetermined detection level for the servo error signal is set. An example is a mode in which the writing speed is tentatively reduced until it is obtained, and writing is restarted after confirming whether or not the restart condition is appropriate.

The servo error signals actually monitored are the focus error signal and the tracking error signal described above. Since each error signal is taken into the DSP 11a in the logic IC 11 through the A / D converter in the servo control loop, the amplitude can be detected as a digital value in the DSP. For the focus error signal, for example, by using a comparison means (a so-called window comparator) in which a detection window is set by defining a plurality of threshold values, writing is interrupted when the signal is above or below one of the threshold levels. It suffices (that is, set that the signal level is out of the allowable range as the interruption condition). For the tracking error signal, a detection window (window) is set by defining a plurality of thresholds, and writing is interrupted only when the upper and lower threshold levels are continuously passed within a certain time (reference time) ( That is, not only the signal level but also the deviation from the allowable range is detected in terms of time, and the case where the judgment time is exceeded is set as the interruption condition). In either case, it can be realized by a mode in which data is taken into the DSP 11a or a mode by hardware logic.

Further, after the writing is once interrupted, it cannot be resumed immediately, so it is necessary to wait for the state to stabilize. However, before the writing is resumed, the servo should be turned off once.
There is also a method of stabilizing servo control by increasing the number of rotations of the optical disk again (spin-up). Then, immediately before resuming writing, it is preferable to check the amplitude of the servo error signal to confirm that it is stable before resuming writing.

In the judgment of interruption and resumption, a prescribed time (a time which is assumed to be too early to give an impact or the like from the outside and which is set in advance in consideration of various conditions) has elapsed since the resumption. Before doing so, it is necessary to consider the case where the interruption signal (the signal from the detecting means and indicating the agreement with the interruption condition) comes again. For example, when the number of the interruption signal is counted, and when the count value reaches the specified number, it is determined that the signal is due to a cause other than the shock, and the rotation speed of the optical disk is automatically decelerated to continue writing. Is preferably performed. This is because it is considered that the interruption signal generated before such a specified time is unlikely to be caused by a transient disturbance such as an impact.

As described above, in the form (1), it is used for the drive control (objective lens drive control) of the head section (see the head section 8 in FIG. 2) for recording information on the recording medium and reproducing the information. By monitoring the servo error signal that is provided, it is possible to define an interruption condition for the variation of the signal. Then, when the change condition matches the condition, the writing speed (or the recording speed) can be set to be lower than the speed at the time of interruption, and then the writing operation can be restarted for writing connection.

Next, the above-mentioned mode (2) will be explained. For this purpose, the following various indexes can be used for performance judgment.

-Spindle position deviation (deviation between the sync position on the disk surface and the sync position of the write signal) -Sled speed and visual field position related to head feed control (depending on the mechanical load, the sled control may not be followed up). It may not work well, and fluctuations and regular delays may occur.In that case, the writing performance may deteriorate.) ・ Error rate (While reading the sync information and the address information while writing the information, its reading ability If it deteriorates, writing cannot be done.) ・ Skew error ・ Write RF (radio frequency) waveform, information such as raw signal of disk information (wobble, LPP) ・ Change of laser beam intensity.

Regarding the displacement of the spindle,
Not a spindle servo error, but a sync
c: Synchronous) It means a position shift. Also, "wobble" is given absolute address information by wobbling of pre-groove in CD-R, CD-RW, etc., and the address on the disc can be known by extracting the information. In addition, when "LPP" is used as the address and synchronization information that replaces this, the information can be used.

The beam intensity is detected by, for example, a laser light source monitoring sensor provided in the head unit 8 and the laser drive unit 13 performs feedback control on the laser light source so that a predetermined value is maintained. However, if the beam intensity deviates from the permissible range for some reason (when the beam intensity is insufficient or excessive), the writing performance may be deteriorated.

In any case, since the cause of degrading the performance of reading and writing information is not limited to one, a comprehensive judgment is made by referring to various kinds of information, and interruption conditions corresponding to various factors are set. However, it is preferable to define the resumption condition according to the interruption condition.

As a signal for stopping the operation during normal writing, in addition to a signal indicating out-of-focus and out-of-track, there is a sync position shift related to the spindle, and a situation in which no sync loss (unextractable) Is a signal indicating. There are two kinds of spindle position deviations, namely, when the servo control cannot follow and when the disc information cannot be read correctly. However, when the disc information cannot be read, the sink may not be able to come out. One of the main causes is that the visual field is deteriorated due to the influence of the sled control servo. In addition, the reading performance of information may deteriorate due to the factors of the optical block including the laser and photo detector, but this cannot be taken in by the servo error signal, so it may be reduced due to the error rate (or jitter). It is preferable to grasp as. In addition, since the reading performance is deteriorated by skew (disk skew), it is detected whether the skew angle or the like is within the allowable range. It should be noted that the factor relating to the deterioration of the reading performance is also the factor relating to the deterioration of the writing performance.

As described above, most of the above-mentioned information (excluding when the spindle cannot follow) is used to judge whether the disk information can be correctly read or whether the writing performance has deteriorated. You can

Regarding the displacement of the spindle,
The discrepancy between the disc information sync (synchronization information) and the write signal sync can be detected by hardware.
Regarding the thread speed related to head feed control,
It can be obtained by detecting the interval of the sled FG (Frequency Generator) pulse (phase detection signal for sled motor control) by hardware, and the visual field signal related to the lens system can be taken out from the optical head (pickup). It can be taken into the DSP 11a after D conversion. Then, the error rate can be taken out from the decoder of the disc information (it can be processed inside the logic IC 11 in FIG. 2).

As shown in FIG. 2, there are provided three buffer underrun detecting units 15, an impact detecting unit 16, and a reading / writing performance detecting unit 17 as detecting means for realizing the writing connection technique. However, what is particularly related to this embodiment is the read / write performance detection unit 17, which sets a suspend condition and a restart condition based on various kinds of information as described above and executes a write connection sequence corresponding to the situation. can do.

Further, when the occurrence of each error is detected or judged based on various information, there is a high possibility that the reading performance and the writing performance are deteriorated, so a predetermined number of times (a number of times as small as possible is set. It is preferable to immediately reduce the rotation of the disk when the error (1) occurs. In other words, the deceleration may increase the margin for writing control, so that it is possible to remedy the case where writing can be continued by reducing the rotational speed of the disk. However, there is no need to decelerate when detecting buffer underrun.

Various factors are involved in the deterioration of the reading performance and the writing performance, but if roughly classified, they are caused by a disturbance such as shock and others (for example, the quality of the disc). Can be mentioned. Therefore, a mode in which a detection unit (shock detection unit 16) for positively detecting that a transient disturbance including a shock is applied to the apparatus is positively provided, and a recording medium other than the transient disturbance is applied to the recording medium. Detecting means for detecting deterioration of information writing performance or reading performance (reading and writing performance detecting unit 1
7) is provided. In any case, while setting the interruption condition that is not caused by transient disturbance,
When the writing is interrupted by the interruption signal when the interruption condition is met, the writing speed may be set lower than the interruption speed, and the writing operation for writing connection may be restarted.

In the above mode (3), it is necessary to provide a detecting means for detecting a shock to the device (included in the shock detecting section 16). In that case, it is preferable to provide a plurality of detection means (impact sensors).
For example, there are a mode in which each detecting means is arranged so that the direction of the sensitivity axis is different from each other, and a mode in which the detecting means is installed in the vicinity of the head part near the recording medium and in the housing part of the apparatus.

In other words, although a form in which only one impact sensor or the like is used is conceivable, in order to improve the detection accuracy, a plurality of impact sensors are installed (changing the direction of the installation axis, setting the installation location to an optical location). It is preferable to divide it into the vicinity of the head and the device housing.) This makes it possible to optimize impact detection and prevent erroneous detection and the like.

For example, the shock sensor is mounted on a substrate connected to the optical head without a damper, and is in the radial direction of the disk (direction perpendicular to the track).
Also, it should be installed so as to have sensitivity in the vertical direction (focus direction), and the output amplified by the detection signal of each sensor may be judged by a comparison means (window comparator, etc.) (when impact is detected on each sensor output). It is judged that there is a shock.).

In the above description, the use of the servo error signal has been described, but the use of the shock sensor is actually effective because there is a possibility of erroneous detection, as will be described later, with only this signal. However, the detection signal from the impact sensor is not as direct as the servo error signal, so considering that accurate detection cannot be performed, two sensors with sensitivity in both the focus and track directions are installed. Or, a sensor that detects the vibration near the optical head and a sensor that is arranged in the part fixed to the device housing for the purpose of increasing the sensitivity to external vibration instead of self-excitation, respectively. The installation form is effective in increasing the detection accuracy.

If the servo error signal (focus error signal, tracking error signal) and the shock detection signal are used together and the writing operation is interrupted based on the logical sum signal of the three detection signals, the accuracy can be improved.

FIG. 3 shows an example 20 of such a configuration, and expresses the processing performed in the suspension / resumption processing unit 14 as an equivalent circuit.

The meaning of each signal shown in the figure is as follows.

"Sfs" = interruption determination signal based on focus error signal (interruption occurs at H level) "Str" = interruption determination signal based on tracking error signal (interruption occurs at H level) ) “Ssk” = interruption determination signal based on impact detection signal (H
Indicates an interruption occurred at the level. ) "Smk" = masking signal for Sfs and Str (mask is shown at L level).

As shown in the figure, it is composed of two AND (logical product) gates 21 and 22 and one OR (logical sum) gate 23. The AND gates 21 and 22 have two inputs and one output, and the OR gates. 23 has three inputs and one output.

Sfs is input as one input of the AND gate 21 and Smk as the other input of the gate.
Is supplied. Further, Str is input as one input of the AND gate 22, and Smk is supplied as the other input of the gate.

Then, the output signals of the AND gates 21 and 22 and Ssk are supplied as the inputs of the OR gate 23, and the interruption signal can be obtained based on the output signal of the OR gate.

That is, when Smk is at the H (high) level, Str and Sfs are directly sent to the OR gate 23 without being masked, so that Str, Sfs or Ss are sent.
When any one of k becomes H level, an interruption signal is generated. Further, when Smk is at L (low) level, the outputs of the AND gates 21 and 22 are both at L level, and Ssk is passed through the OR gate 23 as it is (based on Ssk, an interrupt signal is generated). Occur.).

As described above, when the detection means for detecting the impact on the apparatus is provided and the interruption condition is set by using the signal based on the servo error signal in addition to the detection signal obtained by the detection means, the detection accuracy is improved. It is effective for

In each of the above-described embodiments, after the writing operation is interrupted according to the cause of interruption based on various detection information, the writing speed is set to be lower than the speed at the time of interruption, and the writing is continued. When the writing operation is restarted, it is preferable to store the information indicating the set writing speed together with the identification information of the recording medium (under the control of the interruption / resumption processing unit 14 constituting the writing control unit in FIG. 2). Store those information in memory etc.). For example, when the writing is resumed and the writing is performed after the writing is interrupted, which is estimated to be caused by the quality of the disc, the ID (identification information) of the disc and the writing speed (final disc rotation speed, etc.) ) With,
If the drive device is provided with the function of storing both information in a non-volatile memory, etc., the speed will decrease when the disc is once ejected from the drive device and the disc is inserted into the drive device again to write additional data. It is possible to restart the process from the state (that is, I of the disk).
Since the drive remembers D, by knowing the previous writing speed from the search of the ID, the writing operation can be started at the speed, and the shift control according to each disk becomes possible. ). In this way, when writing is performed in a decelerated state before the recording medium is ejected from the apparatus, the writing speed at that time may be saved in the apparatus together with the identification information of the recording medium, and then the relevant When the recording medium is mounted on the apparatus again and used, the writing operation can be performed at the stored writing speed, so that it is possible to cope with the interruption factor unique to the disc.

Next, a technique for preventing erroneous detection of impact or minimizing damage due to the erroneous detection will be described.

For this purpose, the following method may be mentioned.

(I) A method for preventing a phenomenon caused by the quality of the disc from being erroneously detected as one caused by a transient impact. (II) An erroneous change detected periodically due to scratches on the disc. Method for not detecting (III) A method for preventing a phenomenon caused by an eccentric center of gravity of a disc from being erroneously detected as a phenomenon caused by a transient impact.

First, the above (I) does not depend on the transient impact on the apparatus, but the servo state (tracking servo or focus servo) may be constantly inconvenienced due to the disc quality or control state. Therefore, it is necessary to take measures to prevent such a phenomenon from being misunderstood as if it were caused by a shock. In that case, for example, it is determined that the interrupt signal based on the servo error signal is continuously generated for a predetermined number of times or more, and the writing speed is decelerated to stabilize the servo state and to change. Is preferably suppressed.

As described above, with respect to the servo error signal, fluctuations in the servo control state may occur in addition to external vibrations due to scratches on the disk, slight waviness in the track, and the like. Further, in the case where the vibration continues steadily due to the vibration from the outside, as a result of continuous or continuous impact detection, unnecessary writing connection is frequently performed. In order to avoid such an inconvenience, if the interruption signal comes again within the specified time (time that is expected to be too early for the next interruption signal) after resuming writing once, the signal concerned When the number of times reaches a predetermined number (for example, 2 times), it is judged that it is caused by a factor other than transient impact, and the disc rotation speed is automatically determined. It is preferable to resume the writing and joining operation after decelerating to 1. Further, in deceleration, a minimum speed is set in advance, and when the rotational speed of the disk decreases to the minimum speed, the detection range by the servo error signal is expanded from that point to decrease the detection sensitivity. In that case, there is a high possibility that the cause of interruption cannot be correctly detected, but this can be compensated for by using an impact sensor together.

As described above, since there is a certain limit in the form of monitoring the servo error signal used for the drive control of the head portion 8, the factors other than the shock applied to the device are based on the quality and condition of the recording medium. When a situation in which the fluctuation of the servo error signal is large occurs, for example, by taking measures such as comparing the number of occurrences or the duration of the situation with a predetermined comparison reference value, deceleration related to the writing speed is performed. It is desirable to control.

With regard to the above item (II), it is preferable to ignore the fluctuation of the servo error signal detected in each rotation cycle of the disk, in order to prevent erroneous detection due to scratches or dirt on the disk. In other words, since a flaw, which is one of the factors of erroneous detection, is always reflected in the error signal with the rotation cycle, the spindle FG pulse (phase detection signal for spindle motor control) is used to make a single rotation after the first restart. In the vicinity of the front and rear, the detection of the servo error signal is masked only during a narrow rotation angle so that the change in the error signal during the masked period is not judged to meet the interruption condition (for example, FIG. 3). In the configuration shown in (3), Smk may be set to the L level during the mask period.) Then, if the state in which the disturbance is not detected in the signal during the masked narrow rotation angle continues for a predetermined number of times, it is considered that the scratch section has ended, and the mask is released (for example, the configuration shown in FIG. 3). In, Smk should be set to H level.).

As described above, the servo error signal is monitored, and the behavior change or fluctuation of the servo error signal generated in synchronization with the rotation cycle of the recording medium due to the quality of the recording medium is interrupted. Since it can be ignored by intentionally excluding it from the above, it is possible to avoid the inconvenience that the writing operation is frequently interrupted due to the influence on the servo error signal due to the damage of the disk or the like.

The above item (III) is a countermeasure against the vibration caused by the eccentric center of gravity of the disk being detected by the shock sensor and being erroneously determined as a shock to the device. In other words, when a disk with a large eccentricity or eccentricity is rotated, unnecessary vibration becomes remarkable as the rotation speed of the disk increases, so that the vibration and a transient impact on the device may occur. Need to be distinguished.

Therefore, in order to prevent erroneous detection, the output level of the shock sensor is checked before writing, and when it is determined that the eccentricity amount of the disc (which can be detected from the acceleration information) is large, the disc It is preferable to reduce the rotation speed.

In other words, at high speed rotation, the frequency at which servo drop (unable to follow) and the rotation frequency approach each other, making it difficult to separate the two using a filter. Therefore, shock detection is performed before writing, and when the detection level reaches a predetermined level, the rotation frequency is reduced to decelerate. This is also effective in simultaneously ensuring the stability of writing. If you slow down the rotation of the disk, the level of vibration due to rotation will decrease and at the same time separation by a filter will be possible,
The probability of false positives will be dramatically reduced.

As described above, when the detecting means for detecting the impact on the apparatus is provided, it is necessary to consider the influence caused by the eccentric center of gravity of the disk-shaped recording medium.
The eccentricity amount of the recording medium is detected before writing the information to the disc-shaped recording medium, and when it is determined that the eccentricity amount is large, the rotational speed of the disc-shaped recording medium may be reduced. preferable.

Next, a technique for detecting or verifying whether or not writing and writing have succeeded will be described.

There are the following two modes.

(A) When writing is resumed and information is continuously written after the interruption of writing, the information is written while sequentially checking whether or not a gap portion is generated at the time of interruption ( B) When the writing is resumed and the information is connected after the interruption of the writing, the interruption condition or the resumption condition, or the interruption condition and the resumption condition are stored together with the information of the writing start position indicating the writing connection position. , After the writing operation is completed, whether or not the information is correctly written before and after the writing start position corresponding to the location is searched by searching the writing connection location that meets the interruption condition or the resumption condition designated or set by the external device. Form to verify.

First, in the form (A), when writing is performed, a gap (a non-recorded area generated between the write interruption position and the writing start position on the disk) is caused by the servo state at the time of the previous interruption. Check if it is not made or if its length is within the allowable range. Since the write start address is recognized by the drive device side, it is possible to detect whether or not the RF signal is written up to the address.

As a factor causing writing failure due to shock, information is not written up to the position where the user thinks that information was written on the recording device side, in time for interruption.
It is possible that there is a gap portion after writing and connecting. In order to detect this, a recorded signal defined as a logical signal according to the presence or absence of an RF signal (a RECD signal indicating a bit (signal is present) with a logical value "1")
Can be determined using. Since the device knows the address when the write is suspended,
It is detected whether or not writing has been completed up to that point. still,
Although it is easy to detect after writing, it causes a dilemma that writing must be interrupted again to detect it. By using the method of always checking in real time whether there is a gap or not, it is possible to confirm the presence or absence of a gap in a series of flows in resuming interruption.

With regard to the form (B), the recording device remembers the written address, the suspending condition and the restarting condition, and informs the host computer etc. after the writing is completed and partially verifies them according to the condition (verify). )I do.

With a write concatenation caused by a shock or other factors, there is no guarantee that it will always succeed, so the write concatenation may fail. Therefore, it is desirable to verify after writing is complete, but it is difficult to do all of that. In order to reduce the processing load, the device side may remember the place where the writing is continued and the cause of the interruption at that time, and the device may be partially verified according to the degree of danger. In other words, instead of always verifying all the writing joints, it is possible to search only the writing joints that meet the specified or set suspend or resume conditions and verify the correctness of the writing information at that place. By doing so, it is efficient and the processing time is short. In addition, the search condition and the like can be set or selected by the user.

FIG. 4 is a flow chart showing an example of the processing performed under the control of the interruption / resumption processing section 14 for the recording procedure according to the present invention.

First, assuming that the write operation is being performed in step S1, as shown in the next step S2 during the write operation, if an interrupt signal is generated, the process proceeds to step S3 to interrupt the write operation. If there is no interruption signal in step S2, nothing is done and the process returns to step S1.

If the writing is interrupted, the process proceeds to step S4, waits for the control state to stabilize, and then step S4.
Go to 5. Here, it is determined whether or not the interruption signal is caused by an impact on the device, and if so, the process proceeds to step S6, but if not, the process proceeds to step S13.

In step S6, it is detected whether or not a gap is generated at the time of interruption (or whether or not it is an allowable gap). If a problematic gap is generated, the process proceeds to step S15. If no gap is generated, the process proceeds to the next step S7 to restart writing.

In the next step S8, it is judged whether or not an interruption signal is generated during the writing. If the interruption signal is generated, the process proceeds to the next step S9, but if the interruption signal is not received, nothing is done. The process returns to step S7 to continue writing.

In step S9, it is determined whether or not the interruption signal is generated in synchronization with the rotation cycle of the disk, that is, whether the scratch or dirt on the disk causes the interruption. If there is, the influence on the servo error signal caused by it is ignored, and the process returns to step S7. If the interruption signal is generated irrespective of the rotation cycle of the disc, the process proceeds to the next step S10 to temporarily suspend the process.

Then, in step S11, it is determined whether or not the interruption time is shorter than the specified time. If it is a short time, the process proceeds to the next step S12, but if the interruption time is longer than the specified time, the process returns to step S4.

In step S12, it is determined whether or not the number of interruptions (the number of interruption signal generations) has reached a predetermined number (a prescribed number, which is referred to as "nth time" in the figure). If so, the process proceeds to step S13, but if it is less than the specified number of times, the process returns to step S4.

If it is determined in step S5 that the cause of interruption is not an impact, or if the number of interruptions reaches the specified number in step S12, the process reaches step S13, in which the rotational speed of the disk is decelerated. Then, the process proceeds to the next step S14, the presence or absence of a gap is detected as in S6, and if a problematic gap has occurred, the process proceeds to step S15, but if no gap has occurred, step S1. Return to.

In step S15, error processing (storing error history, recording occurrence address, interruption resumption condition, etc.,
Warning display etc. are included).

However, according to the above configuration, the CD-R or
Since it is possible to safely perform the write connection control on a sequential write system medium (a medium capable of continuous writing in time series) such as a DVD-R, it is possible to realize a high-quality recording process.

[0087]

As is apparent from the above description, according to the inventions according to claims 1 and 13, the resumption condition is defined according to the interruption condition of the writing, so that it is possible to connect the writing. It is possible to safely restart the writing operation, and it is possible to prevent unnecessary writing connection or the like due to erroneous detection.

According to the inventions of claim 2, claim 3, claim 14, and claim 15, the write speed can be changed to a low speed according to the interruption condition, so that the write operation can be safely resumed. .

According to the inventions of claim 4, claim 5, claim 16 and claim 17, the information indicating the write speed which is set to be decelerated is stored together with the identification information of the recording medium, so that the apparatus can thereafter read the information. Even when the recording medium is ejected, the writing operation can be performed at the stored writing speed during the next use.

According to the inventions according to claim 6, claim 7, claim 18, and claim 19, it is possible to prevent erroneous detection of the impact on the device, thus improving reliability.

According to the inventions according to claim 8, claim 9, claim 20, and claim 21, it is erroneously determined to be due to the impact even though the cause of interruption other than the impact on the device occurs. Can be prevented from being judged.

According to the tenth and twenty-second aspects of the present invention, unnecessary vibration occurs due to the large amount of eccentricity of the disk-shaped recording medium as a cause of interruption other than impact on the apparatus. Nevertheless, it is possible to prevent this from being mistakenly determined to be due to a shock.

According to the eleventh and twenty-third aspects of the present invention, at the time of writing connection, the writing process can be executed while always confirming the occurrence of the gap portion, so that the writing connection can be easily verified. .

According to the twelfth and twenty-fourth aspects of the present invention, the verification is not performed for all the writing connection locations after the write operation is completed, but the verification is performed according to the weight (or importance) of the required condition. Since it is possible to search for a necessary writing connection place, the verification process can be performed efficiently.

[Brief description of drawings]

FIG. 1 is a conceptual diagram for explaining a configuration of the present invention.

FIG. 2 is a diagram showing a configuration example of an apparatus according to the present invention.

FIG. 3 is a diagram for explaining an interruption condition when a servo signal and an impact detection signal are used together.

FIG. 4 is a flowchart showing a processing example according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Information recording device, 2 ... Recording medium, 4 ... Write control means, 5 ... Detection means, 8 ... Head part

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 5D044 AB01 BC04 CC04 DE46 EF03                       GK10 GK19                 5D090 AA01 BB03 BB04 CC01 CC09                       DD03 FF02 HH02                 5D118 AA24 BA01 BB03 BF03 BF08                       CB01 CD02 CD03

Claims (24)

[Claims] 1. An information recording device comprising a write control means for writing information to a writable recording medium continuously over a predetermined section of the recording medium and controlling an operation for writing and writing information. In the device, when writing information to the recording medium, the writing control means defines a write interruption condition and, when the condition is met, temporarily interrupts the operation of writing information to the recording medium, The write control means defines the restart condition for restarting the write operation for the connection of writing of information according to the interrupt condition, and restarts the writing of information to the recording medium when the condition is met. An information recording device characterized by the above. 2. The information recording apparatus according to claim 1, wherein a servo error signal used for drive control of a head section that records or reproduces information on a recording medium is monitored, and the fluctuation status of the signal is monitored. The writing control means defines the interruption condition, and when the interruption condition is met, the writing speed is set lower than the interruption speed by the writing control means, and the writing operation for writing connection is restarted. An information recording device characterized by being provided. 3. The information recording apparatus according to claim 1, wherein a detection unit for detecting that a transient disturbance is applied to the apparatus or a performance of writing information on a recording medium due to factors other than the disturbance, A detection means is provided to detect that the reading performance has deteriorated,
The interruption condition corresponding to the detection means is defined by the writing control means, and when the writing is interrupted by the interruption condition not caused by the transient disturbance, the writing speed is interrupted by the writing control means. An information recording device characterized in that a writing operation for writing connection is restarted after being set to a speed lower than the speed. 4. The information recording apparatus according to claim 2, wherein when the writing speed is set lower than the speed at the time of interruption and the writing operation for writing connection is restarted, it is set. An information recording apparatus, wherein information indicating a writing speed is stored by a writing control unit together with identification information of a recording medium. 5. The information recording apparatus according to claim 3, wherein when the writing speed is set lower than the speed at the time of interruption and the writing operation for writing connection is restarted, it is set. An information recording apparatus, wherein information indicating a writing speed is stored by a writing control unit together with identification information of a recording medium. 6. The information recording apparatus according to claim 1, wherein a plurality of detecting means are provided to detect an impact on the apparatus, and each detecting means is arranged so that the directions of the sensitivity axes are different from each other. Alternatively, the information recording apparatus is installed in the vicinity of the head section near the recording medium and in the housing section of the apparatus. 7. The information recording apparatus according to claim 2, further comprising: a detection unit for detecting an impact on the device, and the interruption condition using the detection signal obtained by the detection unit for the servo error signal is written. An information recording device defined by a control means. 8. The information recording apparatus according to claim 1, wherein a servo error signal used for drive control of a head section for recording or reproducing information on a recording medium is monitored and other than a shock applied to the apparatus. An information recording apparatus, wherein a writing control means reduces a writing speed when a fluctuation of a servo error signal based on a quality or a state of a recording medium is large as a factor. 9. The information recording apparatus according to claim 1, wherein a servo error signal used for drive control of a head portion that records or reproduces information on or from the disk-shaped recording medium is monitored, and the disk-shaped recording medium. The information recording apparatus is characterized in that the fluctuation of the servo error signal generated in synchronization with the rotation cycle of the disc-shaped recording medium due to the quality of is excluded from the interruption condition and ignored. 10. The information recording apparatus according to claim 1, further comprising detection means for detecting an impact on the apparatus, and obtaining an output of the detection means before writing information on the disc-shaped recording medium. An information recording apparatus, which reduces the rotation speed of a disk-shaped recording medium when it is detected that the amount of eccentricity of the disk-shaped recording medium is large. 11. The information recording apparatus according to claim 1, wherein when the writing is resumed and the information is continuously written after the writing is interrupted, it is always checked whether or not a gap portion is generated at the time of the interruption. However, the information recording apparatus is characterized in that the information is written by the writing control means. 12. The information recording apparatus according to claim 1, wherein when the writing is resumed after the writing is interrupted and the writing of the information is performed, the interruption condition or the information of the writing start position indicating the writing joining position is set. The resumption condition is stored by the writing control means, and after the writing operation is completed, a writing connection place that meets the interruption condition or the resumption condition designated or set by the external device is searched for before and after the writing start position corresponding to the place. An information recording device, characterized in that it is verified whether or not information is correctly written. 13. An information recording method for continuously writing information to a writable recording medium over a predetermined section of the recording medium and for continuously writing information, comprising: When writing, write interruption conditions are specified, and if the conditions are met, the operation of writing information to the recording medium is temporarily interrupted, and then the write operation is resumed for writing information. When resuming conditions are specified according to the above interruption conditions,
An information recording method, wherein writing of information to the recording medium is restarted when the condition is met. 14. The information recording method according to claim 13, wherein a servo error signal used for drive control of a head unit for recording or reproducing information on a recording medium is monitored and the fluctuation state of the signal is interrupted. When the conditions are met, the information recording method is characterized in that the writing speed is set to be lower than the speed at the time of interruption, and then the writing operation for writing connection is restarted. 15. The information recording method according to claim 13, wherein it is detected that the writing performance or the reading performance of the information on the recording medium is deteriorated due to a factor other than a transient disturbance, and the detection result is interrupted. An information recording method, characterized in that, when the writing is interrupted in accordance with the condition, the writing speed is set to be lower than the speed at the time of interruption, and then the writing operation for writing connection is restarted. 16. The information recording method according to claim 14, wherein, when the writing speed is set lower than the speed at the time of interruption and the writing operation for writing connection is restarted, the set writing speed is set. Is stored together with the identification information of the recording medium, and when the recording medium ejected from the device is mounted again in the device and then used, the writing operation is started at the stored writing speed. An information recording method characterized by: 17. The information recording method according to claim 15, wherein, when the writing speed is set lower than the speed at the time of interruption and the writing operation for writing connection is restarted, the set writing speed is set. Is stored together with the identification information of the recording medium, and when the recording medium ejected from the device is mounted again in the device and then used, the writing operation is started at the stored writing speed. An information recording method characterized by: 18. The information recording method according to claim 13, wherein the plurality of detecting means are arranged such that the directions of the sensitivity axes are different from each other, or in the vicinity of the head portion close to the recording medium and the housing of the apparatus. An information recording method, characterized in that each detecting means is installed in the section to detect an impact on the device. 19. The information recording method according to claim 14, wherein the write operation is interrupted when the interrupt condition that combines the degree of shock applied to the device and the variation status of the servo error signal is met. Information recording method. 20. The information recording method according to claim 13, wherein a servo error signal used for drive control of a head section for recording or reproducing information on or from a recording medium is monitored and other than an impact applied to the device. An information recording method, wherein the writing speed is decelerated when the fluctuation of the servo error signal based on the quality or state of the recording medium is large as a factor. 21. The information recording method according to claim 13, wherein a servo error signal used for drive control of a head section for recording or reproducing information on or from the disc-shaped recording medium is monitored, and the disc-shaped recording medium. The information recording method is characterized in that the fluctuation of the servo error signal generated in synchronism with the rotation cycle of the disk-shaped recording medium due to the quality is ignored. 22. The information recording method according to claim 13, wherein the impact on the device is detected, and the eccentricity amount of the disc-shaped recording medium is large before the information is written on the disc-shaped recording medium. The information recording method is characterized in that the rotational speed of the disk-shaped recording medium is decelerated when detected. 23. In the information recording method according to claim 13, when writing is resumed after writing is interrupted and information is continuously written, it is always checked whether or not a gap portion is generated at the time of the interruption. The information recording method is characterized in that the information is written while being written. 24. The information recording method according to claim 13, wherein when the writing is resumed after the writing is suspended and the writing is performed, the interruption condition or the information of the writing start position indicating the writing joining position is set. The restart condition is stored, and a writing connection place that matches the interruption condition or the restart condition specified or set after the end of the write operation is searched, and the information is correctly written before and after the write start position corresponding to the place. An information recording method characterized by verifying whether or not it is present.