JPH10134479A - Optical disk drive - Google Patents

Abstract

(57) [Problem] To enable correct writing of track address information to a PMA even if writing is interrupted due to running out of battery while writing data to an optical disk. SOLUTION: When a power supply voltage of a battery 11 becomes lower than a preset reference voltage, a CPU 7 writes write status information indicating whether or not track address information has been written to an optical disc 1 in a nonvolatile memory 8. When it is determined that the track address information has not been written to the optical disc 1 based on the write status information stored in the nonvolatile memory 8 when the power is turned on again, the track address information is written to the optical disc 1 and Unloading of the optical disk 1 is prohibited until the writing is completed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
-E and the like.

[0002]

2. Description of the Related Art A portable CD-E drive device and a portable CD-ROM, which can read and write data from and to an optical disk by using a battery as a power source and have an auto-loading and ejecting mechanism for automatically inserting and removing the optical disk. 2. Description of the Related Art In an optical disk device such as an R device, when writing data tracks to a mounted optical disk, the following two writing methods are used.

(1) One is to write the track address information of the reserved start time and stop time of the track before writing the user data to the track in an enlarged recording area (PMA) on the optical disk, and thereafter to write the user data. How to write.

(2) Another method is to store information to be written to the PMA in the apparatus without immediately writing it to a disk even if a track reservation command is received. Generally, a volatile memory is used for this storage. Then, after the user data is written, immediately before ejecting the optical disc, the stored information is written to the PMA.

When a battery is used as a power supply for a disk, the power supply voltage monitoring level is set to two levels, upper and lower.
Two levels are provided, and when the battery voltage falls below the upper voltage level, the current supply to the write and erase current drive circuits is stopped, and when the battery voltage falls below the lower voltage level, all power is supplied. (See, for example, JP-A-5-22983).

[0006]

However, in the above-mentioned writing method (1), when writing is interrupted due to running out of battery during writing of user data after writing PMA, battery replacement or connection of an AC adapter or the like is performed. When power is turned on again and writing is performed again,
Since the MA has already written, the data writing is restarted from the track following the track that was being written at the time of the interruption, leaving an unused portion in the track where the writing was interrupted and wasting storage space. There was a problem that it would.

In the above-mentioned writing method (2),
When writing is interrupted due to running out of battery while writing user data and writing PMA, battery replacement or AC
When the power is turned on again by connecting an adapter or the like and the writing is performed again, the PMA has not completely written the data, so that the user data is overwritten and the data writing cannot be performed correctly. Was.

Further, in the above-described device for monitoring the power supply of the battery, the power supply is stopped when the voltage falls below a predetermined level, so that the above-mentioned problem cannot be solved.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and has as its object to correctly write track address information to a PMA even when writing is interrupted due to running out of a battery while writing data to an optical disk. And Another object of the present invention is to make it possible to write data correctly by using a recording area without waste.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides means for recording and reproducing data by irradiating a light spot on an optical disk capable of overwriting a plurality of times, and automatically incorporating the optical disk. An optical disc apparatus provided with an auto-loading / ejection means for taking out and taking out the data, a means for writing user data to the optical disc, a means for storing track address information of the user data written by the means in a non-volatile memory, Means for writing the track address information stored in the volatile memory to the enlarged recording area of the optical disk, a battery for supplying power, and a power supply for monitoring whether or not the power supply voltage of the battery has become lower than a preset reference voltage Voltage monitoring means and Means for storing, in a nonvolatile memory, write status information indicating whether or not track address information has been written to the optical disk when the power supply voltage of the nonvolatile memory becomes lower than the reference voltage; and It is determined whether or not the track address information has been written on the optical disk based on the stored write status information.If the track address information has not been written by the determination, the track address information is written on the optical disk. A means is provided for prohibiting removal of the optical disk by the auto-loading / ejection means until the writing is completed.

It is preferable that a means is provided for taking out the optical disk by the auto-loading / ejection means when the power supply voltage of the battery becomes lower than the reference voltage by the power supply voltage monitoring means in a mode other than the write mode.

Further, in an optical disc apparatus provided with a means for recording and reproducing data by irradiating a light spot on an optical disc which can be overwritten a plurality of times, and an auto-loading / ejection means for automatically taking in and taking out the optical disc, Means for writing user data to the optical disc, means for storing track address information of the user data written by the means in a non-volatile memory, and enlargement recording of the track address information stored in the non-volatile memory by the means. Means for writing to the area, a battery for supplying power, a power supply voltage monitoring means for monitoring whether or not the power supply voltage of the battery has become lower than a preset reference voltage, and a power supply voltage of the battery by the means for changing the power supply voltage of the battery to the reference voltage Lower than Means for storing, in the non-volatile memory, write status information indicating whether or not user data and track address information have been written to the optical disc, respectively; and write status information stored in the non-volatile memory when power is turned on again. It is determined whether the user data and the track address information have been completely written on the optical disc based on the above.If the track address information has been written but the user data has not been written on the optical disc by the judgment, If the user data is overwritten on the optical disk and the track address information has not been written on the optical disk,
It is preferable to provide means for writing track address information to the optical disc, then writing user data, and prohibiting removal of the optical disc by the autoloading / ejection means until the writing of the user data is completed.

According to the optical disk apparatus of the first aspect of the present invention, when the voltage level of the power supply voltage of the battery becomes lower than a preset reference voltage and approaches a level that hinders data writing, the optical disk is enlarged and recorded. The write status information indicating whether or not the track address information has been written in the area (PMA) is stored in the non-volatile memory, and when the power is turned on again by battery replacement or the like,
If it is determined from the write status information in the nonvolatile memory that the user data has been written and the track address information has not been written to the PMA, the auto-eject of the optical disc is prohibited and the track address information is written to the PMA. It is possible to solve the problem that the other user data is overwritten in the already written user data area because the writing is not completed, and the first written user data is erased.

According to the optical disk apparatus of the second aspect of the present invention, when the power supply voltage of the battery becomes lower than the reference voltage in a mode other than the write mode, the optical disk is forcibly ejected by auto-ejection. If the battery runs out during lead or pause, it is possible to solve the problem that the optical disk cannot be taken out unless the battery is replaced with a new battery.

Further, according to the optical disk apparatus of the third aspect of the present invention, when the voltage level of the power supply voltage of the battery becomes lower than the reference voltage set in advance and approaches a level that hinders the data writing, The write status information indicating whether the user data and its track address information have each been written is stored in the nonvolatile memory, and when the power is turned on again due to battery replacement or the like, the write status information of the nonvolatile memory is stored. PM
When it is determined that the track address information has been written in A but the user data has not been written, the user data is overwritten on the optical disk, the ejection of the optical disk is prohibited until the writing is completed, and the track address is written in PMA. When it is determined that the information has not been written, the user data is written after writing to the PMA, and the ejection of the optical disk is prohibited until the writing is completed. Therefore, since the PMA has been written, the user data has already been written. It is possible to prevent the user from erroneously recognizing that the area has been written, writing another user data on the next track, and leaving the first written area as an empty area and wasting it.

[0016]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an optical disk device according to an embodiment of the present invention.
FIG. 3 is a diagram showing an example of a format when data is written to the PMA of the optical disk, FIG. 3 is a diagram showing another example of a format when writing data to the PMA of the optical disk, and FIG. 4 is a radial direction of a multi-session type CD-R disk. FIG. 3 is a diagram showing a data area layout.

This optical disk device is used for a CD-R or a CD-R.
It has an auto-loading and auto-eject function for recording / reproducing data on an optical disk such as E and taking in and taking out the optical disk (detailed mechanism is well known, and illustration and description are omitted). As shown in FIG. 1, an optical disc 1 is driven to rotate by a spindle motor 2. The rotation of the spindle motor 2 is controlled by a rotation control system 3, which controls the optical disk 1 to rotate at a constant linear velocity.

The optical pickup 4 incorporates a semiconductor laser (not shown), an optical system, a focus actuator, a track actuator, a four-division light receiving element, and a position sensor.
Irradiate the recording surface of

The signal detection section 6 adds a reflected light from the optical disk 1 received by the optical pickup 4 to an output of the preamplifier via a preamplifier (not shown) to add a reproduction signal (RF signal) of the optical disk 1. And outputs the generated reproduction signal to the drive controller (CPU) 7 via a demodulation circuit (not shown).

A focus error signal (FE signal) is generated by the focus control means (not shown) through the preamplifier (not shown) in the signal detection unit 6 for the reflected light from the optical pickup 4. A track error signal (TE signal) is generated in the omitted track control means based on the focus error signal.

The generated FE signal and TE signal are output to an actuator control system 5, and the actuator control system 5 controls the focus actuator and the track actuator in the optical pickup 4 using the FE signal and the TE signal. I do. The laser drive circuit 9 controls the semiconductor laser in the optical pickup 4.

The process of writing track address information to the enlarged recording area (PMA) of the optical disc 1 is performed by the CPU.
Reference numeral 7 stores the command in advance in the nonvolatile memory 8 and confirms the contents immediately before ejecting the optical disc 1 when a track reservation command is received from an initiator (not shown) via an external interface. The track address information is
These are data such as a start time and a stop time at which the user data of the optical disc 1 is written.

The CPU 7 writes data to the PMA immediately before disc ejection in accordance with the contents. That is, the CPU 7 controls the optical disk 1 inserted by the user.
Is recorded by the auto loading function to record and reproduce the user data on the optical disc 1. The CPU 7 stores the information to be written to the PMA in the non-volatile memory 8 without immediately writing the information to the PMA even when receiving the track reservation command.

Thereafter, the user data is written in the user data area of the optical disk 1, and immediately before the optical disk 1 is ejected, the information stored in the nonvolatile memory 8 is read out and written to the PMA of the optical disk 1, and the optical disk 1 is ejected. I do.

The battery 11 supplies the power supply voltage Vcc to all the circuits in the optical disk device that require power. The reference voltage storage unit 12 stores the battery 11
A value obtained by adding a margin to the limit value of the level at which the supply voltage from the device can perform normal data write is stored.

When the power of the battery 11 becomes low and becomes lower than the reference voltage for comparison stored in the reference voltage storage unit 12 in advance, the power supply voltage monitoring circuit 13 outputs an "H" level signal as a battery abnormality signal. CP
Output to U7. It is preferable to use a comparator such as a comparator or a monitoring LSI for the power supply voltage monitoring circuit 13.
The power supply voltage monitoring circuit 13 outputs an “H” level signal of 2.5 V or more when using CMOS logic, and 2 V or more when using TTL logic.

When the CPU 7 recognizes that the voltage of the battery 11 has become lower than the reference voltage by the “H” level signal from the power supply voltage monitoring circuit 13, it writes track address information to the PMA of the optical disc 1 in the nonvolatile memory 8. The write status information indicating whether or not the writing has been completed is stored. If the user data is being written, the optical disk 1 is ejected. If not, an eject prohibition command is issued.

While receiving no battery abnormality signal from the power supply voltage circuit 13, the CPU 7 does not write track address information to the PMA until an eject command for the optical disc 1 is received. The eject command of the optical disc 1 is notified to the CPU 7 when an eject switch (not shown) is pressed.

When the battery 11 is replaced and the power is turned on again, the CPU 7 reads the write status information from the non-volatile memory 8 and determines whether or not the track address information has been written to the PMA based on the read status information. If the writing has not been completed, the removal of the optical disk 1 by the eject function is prohibited, and the track address information is read from the nonvolatile memory 8 and written to the PMA of the optical disk 1.
After the writing, the eject prohibition is released.

When a multi-session type CD-R disc is used as the optical disc 1, the data area layout in the radial direction is such that the PCA checks the power at the time of writing data to the optical disc as shown in FIG. For example, an area where 100 tests can be performed is secured.

The track address information on the optical disk is written in the PMA. There are a lead-in area and a lead-out area before and after the track where the user data of each session is written, respectively. In the lead-in area, session track information such as a table of contents (TOC) is written. Information on the end of the session is written in the lead-out area.

The PMA is composed of 1000 blocks and records the following three pieces of information. 1. Track number,
1. Start time and stop time of the track 2. Disc identification (optional) Skip / unskip information (the whole track or part of it can be skipped during playback)

As for the above three information, the same value must be repeatedly written in five consecutive blocks. Also,
On the other hand, it is necessary to temporarily write 10 blocks for continuous writing.

Therefore, even if the CPU 7 receives the command of the track reservation of the optical disk 1, the track address information to be written to the PMA is not immediately written to the optical disk 1 but is stored in the drive, and the optical disk 1 is ejected. If writing is performed immediately before, writing can be performed in a format as shown in FIG. 2 and 10 blocks of blocks 11 to 15 and blocks 16 to 20 are written at a time, so that PMA is not wasted.

On the other hand, in the case of a track reservation PMA write process in which a track is reserved before writing user data to the track, one PMA is performed for one track reservation.
Since writing occurs, writing is performed in a format as shown in FIG. 3, and blocks 11 to 20 and blocks 21 to 30 are written at different times.

FIG. 5 is a flowchart showing a data writing process in the optical disk device, and FIG. 6 is a flowchart showing a subsequent process. As shown in FIG. 5, the CPU 7 determines whether or not a battery abnormality signal has been received in step (indicated by "S" in the figure) 1, and if not, proceeds to step 4 to switch to the normal write mode. Execute and end this process.

When the battery abnormality signal is received in the determination in step 1, the flow advances to step 2 to determine whether or not the writing of the track address information to the PMA has been completed.
If not completed, the process proceeds to step 5 to store the write status information indicating that the PMA has not been written in the non-volatile memory. Then, the process proceeds to step 6 to prohibit the ejection of the optical disk, and ends this processing.

If it is determined in step 2 that the writing of the track address information to the PMA has been completed, the flow advances to step 3 to eject the optical disk and terminate the processing.

Further, as shown in FIG.
In step 11, it is determined whether or not an optical disk is inserted. If the optical disk is not inserted, the process is terminated. If the optical disk is inserted, the process proceeds to step 12 to read the contents of the write status information from the non-volatile memory. If the PMA has not been written yet, the process proceeds to step 13 to write the track address information in the non-volatile memory to the PMA on the optical disk, and proceeds to step 14 to eject the optical disk and terminate this processing.

That is, means for the CPU 7 or the like to record and reproduce data by irradiating a light spot on an optical disk capable of overwriting a plurality of times, an auto-loading / ejection means for automatically taking in and taking out the optical disk, Means for writing user data to the optical disc, means for storing the track address information of the user data written by the means in the non-volatile memory, and the track address information stored in the non-volatile memory by the means to the enlarged recording area of the optical disc. Writing means, a battery for supplying power, a power supply voltage monitoring means for monitoring whether or not the power supply voltage of the battery has become lower than a preset reference voltage, and the power supply voltage of the battery being higher than the reference voltage by the means. When low, light Means for storing the write status information indicating whether or not the track address information has been written in the nonvolatile memory, and writing the track address information to the optical disk based on the write status information stored in the nonvolatile memory when the power is turned on again. Means for judging whether or not the writing has been completed, and when the track address information has not been written, writing the track address information to the optical disc, and prohibiting removal of the optical disc by the autoloading eject means until the writing is completed. Perform the function of

In this way, another user data is overwritten in the area of the user data already written because the PMA has not been written, and the user data written first is erased. Can be prevented.

Next, in this optical disk device, it is preferable to automatically eject the optical disk when the battery runs out during data reading or pause. in this case,
When the power supply voltage monitoring means makes the power supply voltage of the battery lower than the reference voltage by the power supply voltage monitoring means in a mode other than the write mode, the CPU 7 and the like also function as a means for taking out the optical disk by the auto loading / ejection means.

FIG. 7 is a flowchart showing the processing at that time. In this processing, the CPU 7 executes step 2
It is determined in step 1 whether or not a battery abnormality signal has been received. If not, the process proceeds to step 24, where a normal write mode is executed, and this process ends.

When the battery abnormality signal is received in the determination in step 21, the flow advances to step 22 to determine whether or not the mode is other than a write mode such as a read mode or a pause.
If the mode is other than the write mode, the optical disk is ejected.

On the other hand, if it is determined in step 22 that the mode is the write mode, the process proceeds to step 23 to determine whether or not the writing of the track address information to the PMA has been completed. Is stored in the non-volatile memory, indicating that the optical disk has not been written, ejecting the optical disk is prohibited, and the process ends. If the writing of the track address information to the PMA has been completed in the determination of step 23, the optical disk is ejected, and this processing ends.

As described above, when the battery runs out when there is no possibility of the PMA not being written, such as in the read mode or the pause mode, the optical disk is automatically ejected. This eliminates the need for time-consuming operations such as taking out an optical disk.

Next, in this optical disk device, it is preferable to check the writing of user data when the battery runs out, so that unwritten tracks are not left.

In this case, means for recording and reproducing data by irradiating a light spot on the optical disk which can be overwritten a plurality of times by the CPU 7 and the like, and an automatic loading / ejecting means for automatically taking in and taking out the optical disk. Means for writing user data to the optical disk, means for storing the track address information of the user data written by the means in the nonvolatile memory, and enlargement recording of the track address information stored in the nonvolatile memory by the means. Means for writing to the area, a battery for supplying power, a power supply voltage monitoring means for monitoring whether or not the power supply voltage of the battery has become lower than a preset reference voltage, and a power supply voltage of the battery by the means for changing the power supply voltage of the battery to the reference voltage Lower than Means for storing in the nonvolatile memory write status information indicating whether the user data and track address information have been written to the disk, and an optical disk based on the write status information stored in the nonvolatile memory when the power is turned on again. It is determined whether the user data and the track address information have been written to the optical disk respectively. If the determination indicates that the track address information has been written to the optical disk but no user data has been written, the user data is overwritten to the optical disk. If the track address information has not been written to the optical disk, the track address information is written to the optical disk, user data is written thereafter, and the optical disk is ejected by the autoloading / ejection means until the writing of the user data is completed. It performs the function of a means to prohibit.

FIG. 8 is a flowchart showing the data writing process in the optical disk device in this case, and FIG. 9 is a flowchart showing the subsequent process. CPU7
Determines whether or not a battery abnormality signal has been received in step 31 as shown in FIG.
The routine proceeds to step 5, where the normal write mode is executed, and the process is terminated.

When the battery abnormality signal is received in the determination of step 31, the process proceeds to step 32, where it is determined whether or not a mode other than a write mode such as a read mode or a pause is determined.
If the mode is other than the write mode, the optical disk is ejected, and this processing ends.

On the other hand, if it is determined in step 32 that the mode is the write mode, the process proceeds to step 33 to determine whether or not the writing of the user data has been completed. Is stored in the nonvolatile memory, and ejecting of the optical disk is prohibited.

If it is determined in step 33 that the writing of the user data has been completed, the process proceeds to step 34, where P
It is determined whether or not the writing of the track address information to the MA has been completed. If the writing has not been completed, the process proceeds to step 37, where the writing status information indicating that the PMA has not been written is stored in the nonvolatile memory. Prohibit ejecting the optical disk. Then, in the judgment of step 34, PM
If the writing of the track address information to A has been completed, the optical disk is ejected.

Further, as shown in FIG.
In step 41, it is determined whether or not an optical disk is inserted. If the optical disk is not inserted, the process is terminated. However, if the optical disk is inserted, the process proceeds to step 42 to read the contents of the writing status information from the non-volatile memory. When the writing of the PMA has been completed and the writing of the user data has not been completed, the process proceeds to step 43, where the user data in the nonvolatile memory is written to the optical disk.

If the writing of the PMA has not been completed in step 42, the flow advances to step 43 to write the track address information in the nonvolatile memory into the PMA of the optical disk, and the flow advances to step 44 to eject the optical disk. , And this process ends.

In this way, another user data is overwritten in the area of the already written user data because the PMA has not been written, and the first written user data is erased. Can be prevented. Further, since the PMA has been written, it is erroneously recognized that the user data has already been written, and the user area is wasted by writing the user data from the next track while leaving an empty area on the track where the writing was interrupted. Can be prevented.

[0056]

As described above, according to the optical disk device of the present invention, even if the writing is interrupted due to the running out of the battery while the data is being written to the optical disk, the P value is not changed.
Track address information can be correctly written to the MA. In addition, data can be correctly written by using the recording area without waste.

[Brief description of the drawings]

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

FIG. 2 is a diagram illustrating a format example when data is written to a PMA of an optical disc.

FIG. 3 is a diagram showing another format example when writing data to the PMA of the optical disc.

FIG. 4 is a diagram showing a data area layout in a radial direction of a multi-session type CD-R disc.

FIG. 5 is a flowchart showing a data writing process in the optical disk device shown in FIG. 1;

FIG. 6 is a flowchart showing the continuation of the data writing process in the optical disk device shown in FIG. 1;

FIG. 7 is a flowchart illustrating another example of the data writing process in the optical disc device illustrated in FIG. 1;

FIG. 8 is a flowchart illustrating still another example of the data writing process in the optical disc device illustrated in FIG. 1;

FIG. 9 is a flowchart showing a continuation of the data writing process in the optical disk device shown in FIG. 8;

[Explanation of symbols]

 1: Optical disk 2: Spindle motor 3: Rotation control system 4: Optical pickup 5: Actuator control system 6: Signal detector 7: Drive controller (CPU) 8: Non-volatile memory 9: Laser drive circuit 11: Battery 12: Reference voltage Storage unit 13: Power supply voltage monitoring circuit

Claims (3)

[Claims] 1. An optical disc apparatus comprising: means for recording and reproducing data by irradiating a light spot on an optical disc capable of overwriting a plurality of times; and auto-loading / ejection means for automatically taking in and taking out the optical disc. Means for writing user data to the optical disc; means for storing track address information of the user data written by the means in a non-volatile memory; and enlargement of the track address information stored in the non-volatile memory by the means. Means for writing to a recording area, a battery for supplying power, a power supply voltage monitoring means for monitoring whether or not the power supply voltage of the battery has become lower than a preset reference voltage; When the voltage becomes lower than the voltage, the light Means for storing in the nonvolatile memory write status information indicating whether or not the track address information has been written to the disk; and when the power is turned on again, the track address is written to the optical disk based on the write status information stored in the nonvolatile memory. It is determined whether or not the information has been written, and when the track address information has not been written by the determination,
Means for writing the track address information to the optical disc and prohibiting the auto loading / ejection means from taking out the optical disc until the writing is completed. 2. The optical disc device according to claim 1, wherein the auto-loading / ejection means removes the optical disc when the power supply voltage monitoring means drops a power supply voltage lower than a reference voltage in a mode other than the write mode. An optical disk device comprising a take-out means. 3. An optical disc apparatus comprising: means for recording and reproducing data by irradiating a light spot on an optical disc capable of overwriting a plurality of times; and auto-loading / ejection means for automatically taking in and taking out the optical disc. Means for writing user data to the optical disc; means for storing track address information of the user data written by the means in a non-volatile memory; and enlargement of the track address information stored in the non-volatile memory by the means. Means for writing to a recording area; a battery for supplying power; a power supply voltage monitoring means for monitoring whether or not the power supply voltage of the battery has become lower than a preset reference voltage; When the voltage becomes lower than the voltage, the light Means for storing in the nonvolatile memory write status information indicating whether or not the user data and track address information have been written to the disk, based on the write status information stored in the nonvolatile memory when the power is turned on again. It is determined whether the user data and the track address information have been written on the optical disc, respectively, and when the track address information has been written on the optical disc but no user data has been written on the optical disc, the user If the data is overwritten and the track address information has not been written to the optical disc, the track address information is written to the optical disc, user data is written thereafter, and the auto-loading edge is written until the writing of the user data is completed. Optical disk apparatus characterized by comprising a means for inhibiting removal of an optical disc according to the defect section.