JP2002170245A - Optical disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical disk device which has a function to read out a recording position information regarding the position of recorded data on the optical disk to the outside and is capable of making inspection as to whether the automatically recorded data is recorded in correct positions or not. SOLUTION: The optical disk device is provided with the function to read out the recording position information regarding positions of the data recorded on the optical disk device to the outside, by which whether the automatically recorded data is recorded in the correct positions or not is inspected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk device, and more particularly to an optical disk device for reproducing a recordable recording medium such as a write-once optical disk in which information can be written only once in the same location.

[0002]

2. Description of the Related Art A write-once optical disk can record information only once. As the write-once type optical disk, for example, a DVD-R disk is known. As an optical disk device for recording data on this DVD-R disk, there is one described in Japanese Patent Application Laid-Open No. 10-293926. This optical disc apparatus uses a DV in which both a pre-pit signal and a wobble signal are recorded in advance.
When data is recorded on a DR disk, it is characterized in that the recording operation can be controlled and the recorded information can be accurately recorded while reliably and accurately detecting the pre-pit signal and the wobble signal.

In the optical disk device described in the above-mentioned Japanese Patent Application Laid-Open No. 10-293926, when data is recorded, a sync frame of data to be recorded in a synchronization signal of a pre-pit signal recorded in advance on a DVD-R disk is used. It is described that the synchronization signal is recorded at the same position. In the conventional optical disk device described in Japanese Patent Application Laid-Open No. 10-293926, a DVD
A function is provided for reading out recorded data recorded on -R and remaining recordable capacity of a DVD-R disc to the outside.
However, the DVD-R disc does not have a function of reading out to the outside whether data is accurately recorded at a recording position based on a pre-pit signal recorded in advance.

The reason is that in a conventional optical disk device (hereinafter referred to as a DVD-R drive), the recorded data is
This is because the information on the location on the VD-R disc that has been recorded is only required to be managed internally by the DVD-R drive itself, and is not a matter to be managed from outside the host computer or the like. However, actually, there have been cases where the recording data cannot be recorded at a correct position due to disturbance during recording, a defect of the DVD-R disc, or the like.

[0005]

As a standard for a DVD-R disc, a DVD-R for General Pa
rt 1 PHYSICAL SPECIFICATION
NS Version 2.0 (R4.7) has been defined. In this standard, a pre-write function for pre-recording predetermined data in a control data area of a lead-in area in a state where user data is not recorded is additionally defined.
According to this additional regulation, DVD-R disc
A predetermined data (hereinafter, referred to as a control data area) in a lead-in area of a DVD-R disc using a -R drive.
Control data). Therefore, it is necessary to confirm whether the control data prewritten at the time of shipment of the DVD-R disc has been recorded at a correct position on the DVD-R disc. Needless to say, it is necessary to judge whether or not the data is recorded in the correct position based on whether or not the above standard is satisfied.

[0006] As a use of a DVD-R disc, when creating a small number of application discs, a DVD-R disc is used.
Recording of application data on a DVD-R disc is performed by an R drive. In this case, when a DVD-R disc on which application data is recorded is distributed to a user, the distribution destination plays back the DVD-R disc using a DVD-ROM drive. In such applications, DVD-R
The drive records the application data in the data area of the unrecorded DVD-R disc on which the control data has been prewritten, and thereafter records the entire lead-in area with predetermined data. When recording predetermined data, it is necessary for the DVD-R drive to connect and record the pre- and post-written control data while maintaining continuity.

At this time, if the recording position of the pre-written control data on the unrecorded DVD-R disc deviates from the position defined by the above standard,
The DVD-R drive overwrites data unnecessarily before and after the prewritten area, or creates an unrecorded area at the joint. In the distribution destination, DV
When a DVD-R disc on which application data is recorded is mounted on the D-ROM drive, first, data in a control data recording area is read. At this time, if the data overwrite area is large or there is an unrecorded area, control data may not be read. For this reason, at the time of manufacturing a DVD-R disc, it is checked whether the recording position of the prewritten control data is correct, and the recording position does not conform to the standard.
VD-R discs had to be kept out of the market.

As described above, the conventional DVD-R drive was able to read the recorded data itself and the remaining recordable capacity. Is not provided. Therefore, it was not possible to confirm whether data was recorded at a correct position on the DVD-R disc. As a result, the DVD-R disc is reproduced by another DVD-R reproducing apparatus, and a pre-pit signal or a wobble signal having a reproduction signal waveform or recording position information in an unrecorded state is monitored by an oscilloscope or the like to confirm a recording position. Needed.

The present invention has a function of reading out recording position information indicating at which position on the optical disk the recorded data has been recorded, and automatically checking whether the automatically recorded data has been recorded at the correct position. It is an object of the present invention to provide an optical disk device that can be inspected.

[0010]

In order to achieve this object, an optical disk apparatus according to the present invention has a wobble signal of a predetermined frequency which wobbles along a recording track and a predetermined phase relationship with the wobble signal. An optical disk device for reproducing data recorded on an optical disk on which a pre-pit signal having address information is formed in advance based on a clock signal phase-synchronized with the wobble signal, wherein wobble detection means for extracting the wobble signal; Clock generating means for generating the clock signal in phase with the wobble signal extracted by the wobble detecting means, prepit detecting means for extracting the prepit signal, decoding the prepit signal extracted by the prepit detecting means, and Pre-pit decoding means for outputting information; A reproduction position generation unit for generating reproduction position information of the optical disk based on the pit signal, the address information, and the clock signal; a recorded data detection unit for detecting the presence or absence of recorded data during reproduction; An external interface for inputting and outputting information is provided.

[0011] According to the optical disk apparatus of this configuration, when the recorded data detection means detects the presence or absence of the recorded data, the recording start position and the recording of the recorded data based on the reproduction position information read from the reproduction position generation means. The recording end position of the completed data can be output to the outside by the external interface means. As a result, it is possible to externally check whether the recording start position and the recording end position are correct for the recorded data whose recording position and recording data amount are known in advance. Also, DV
DVD used for prewriting in the production process of a DR disk
By using the drive as a −R drive, pre-write recording and verification of a recording position can be performed by the same DVD-R drive, so that the manufacturing time of a DVD-R disc can be reduced.

An optical disk device according to another aspect of the present invention is the optical disk device having the above-described configuration, wherein a frame synchronization bit of the pre-pit signal of the optical disk is inserted for each recording unit of recorded data. Recorded data synchronization detecting means for detecting that the signal is within a predetermined period of time, and a frame sync bit of the pre-pit signal within a predetermined period of the frame synchronization signal based on a detection result of the recorded data synchronization detecting means. A counting unit for counting the number of times the frame sync bit is absent when there is no frame sync bit. According to this configuration, the count result of the counting unit is output to the outside through the external interface, so that the number of occurrences of the recording position shift can be confirmed outside.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the optical disk apparatus according to the present invention will be described below with reference to the accompanying drawings.
The optical disk device of this embodiment is a DVD-R fo
r General Part 1 PHYSICAL S
PECIFICATIONS Version 2.0
It complies with the standard of (R4.7). Therefore, prior to the description of the embodiment, the DVD-R for Ge
general Part 1 PHYSICAL SPECI
FICTIONS Version 2.0 (R4.7)
Stipulated. The ECC block address based on the pre-pit signal as information on the recording position is Data
FFCFFF at the beginning of Recordable Area
h is assigned in descending order (in a form in which the number decreases in order) toward the outer periphery. Each sync frame of the ECC block address based on the pre-pit signal has a length of 1488T, and each wobble signal has a length of 1488T / 8, that is, a length of 186T. One sector is formed by 26 sync frames, and 1E is formed by 16 sectors.
A CC block is formed. The points of the configuration of the control data to be prewritten on the DVD-R disc will be described with reference to FIG. FIG. 3 is a diagram showing a configuration of control data recorded in the prewrite area.

First, control data to be prewritten will be described with reference to FIG. DVD-R for G
general Part 1 PHYSICAL SPEC
IFICATIONS Version 2.0 (R4.
In 7), the structure of the lead-in area is defined, and it is specified that the control data area in the lead-in area is prewritten.

The control data area is recorded in 192 ECC blocks of FFD0DFh to FFD020h of the ECC block address. In addition, before and after the control data area, an area B for writing is connected.
lock SYNC Guard Area and Linki
It is specified that ng Loss Area be recorded. Blcock SYNC Guard Area
The recording start position of ECC block address FFD0E
1st SyncFrame of the first sector of 0h
Start position of 15th Bytes of e (15t in standard)
h to 17th, but 15th in the following description. ).

The recording end position of the Linking Loss Area is the ECC block address FFD01Fh.
Is defined as the end position of the 16th Bytes of the first sector of. The recording start position of the prewrite in the control data area is determined by setting the ECC block address by the prepit signal to the physical address 02F of the FFD0E0h.
15 Bytes of 1F0h's 1st Sync Frame
Becomes the beginning of es. Further, the recording end position is determined by setting the ECC block address to 2FE of the physical address in FFD01Fh.
16 Bytes of 1st Sync Frame of 00h
Ends. Block SYNC Guard A
The head of 15 Bytes, which is the recording start position of the area (area), is represented by a unit length of a bit interval of 256T, Lin.
The end of 16 Bytes, which is the recording end position of the King Loss Area (area), is 288T in a similar manner.

For example, at the beginning of 15 Bytes, there is only 14 × 16T of data, and at the beginning of a sync frame is a pair of frame synchronization signals. Since the frame synchronization signal area is 2 × 16T, the sum of both is 14 × 16T + 2 × 16T = 256T. The end portion of 16 bytes can be calculated similarly. Also, the pre-pit sync code B of the pre-pit signal
It is stipulated that 0 should be within the area SY where 14 consecutive 0s should be recorded in the frame synchronization signal of the recording data. Therefore, when recording data continuously, all the pre-pit sync codes B0 are required to be within the SY area where 14 consecutive 0s of the sync code of the recording data are recorded.

As described above, when inspecting whether or not control data has been prewritten at a correct position on a DVD-R disk production line, the following three points may be confirmed. That is, as a first point, the pre-pit sync code B0 is within the SY area where 14 consecutive 0s of the sync code of the recorded data in the sync code of the recorded data are recorded. Second, an ECC block address obtained by decoding a pre-pit signal, FFD0E
1st Sy of 02F1F0h of physical address in 0h
Start of 15 Bytes of nc Frame (15 Bytes)
es), there is a recording start position. Third, the ECC block address, FFD0
1st Sy of 2FE00h of physical address in 1Fh
There is a recording end position at the end of 16 bytes of nc Frame. It is necessary to confirm the above three points.

The accuracy of the recording start position and the recording end position is as follows.
Considering that the pre-pit sync code B0 is in the area where 14 consecutive 0s of the sync code of the recorded data are recorded in the SY area in the frame synchronization signal of the recording data, ± 7T from the center value Have to enter.

Embodiment 1 FIG. 1 is a block diagram showing a configuration of an optical disk device according to Embodiment 1 of the present invention. In FIG. 1, a DVD-R disc 1 is rotated by a spindle 2 and signals are recorded and reproduced by an optical pickup 3.
The servo unit 4 controls the driving of the optical pickup 3 and the spindle 2 according to a command from the CPU 8. The reproduction signal output from the optical pickup 3 is converted by the head amplifier 6 into an RF signal and a push-pull signal. The RF signal reproducing unit 6
The signal is binarized, and the presence or absence of an RF signal is detected. RF
The reproduced signal binarized by the signal unit 6 is decoded by the decoder 7. The interface unit 9 exchanges data between the optical disk device and the outside.

The wobble detector 10 detects a wobble signal from the push-pull signal output from the head amplifier 6. The pre-pit detector 11 detects a pre-pit signal from the push-pull signal output from the head amplifier 6. The prepit decoder 12 decodes a prepit signal and extracts an ECC block address. The write clock write timing generator 13 generates and outputs a write clock for recording synchronized with the wobble signal, and also outputs the ECC output from the prepit decoder 12.
The recording timing is controlled by counting the block address extraction result and the generated write clock.

The encoder 14 converts the data transmitted via the interface unit 9 into digital data to be recorded. The recording position detection unit 15 captures the recording timing signal of the write clock write timing generation unit 13 at the rising and falling timings of the RF signal detection signal from the RF signal reproducing unit 6, and detects the recording position. The laser power controller 16 modulates the laser power of the optical pickup 3.

The operation of the optical disk device of the first embodiment configured as described above will be described with reference to FIGS.
At the time of recording, the optical pickup 3 irradiates the DVD-R disc 1 with a light beam controlled by a laser drive signal based on recording data supplied from the laser power control unit 16 to record data. During playback operation,
The optical pickup 3 converts the light beam into D at a constant output power.
It irradiates the VD-R disc 1 and receives the reflected light to convert it into an electric signal. The servo unit 4 controls the drive of the optical pickup 3 and the spindle 2 according to a command from the CPU 8,
A signal is recorded and reproduced at a predetermined position on a DVD-R disc. The head amplifier 5 converts the RF signal generated from the electric signal output from the optical pickup 3 into an RF signal reproducing unit 6.
Then, a push-pull signal is output to the wobble detection unit 10 and the pre-pit detection unit 11. The RF signal reproducing unit 6 converts the RF signal into a binary signal and outputs it to the decoder 7, detects the presence or absence of the RF signal, and outputs the result to the recording position detecting unit 15.

The decoder 7 decodes the binarized signal of the RF signal and detects a synchronous position. CPU8
Outputs the data decoded via the interface 9 based on the synchronization signal output from the decoder 7 to the outside. The wobble detection unit 10 detects a wobble signal from the push-pull signal output from the head amplifier 5,
The write clock is output to the write timing generator 13. The pre-pit detector 11 detects a pre-pit signal from the push-pull signal output from the head amplifier 5,
The write clock is output to the write timing generator 13 and the pre-pit decoder 12.

The pre-pit decoder 12 decodes the pre-pit signal and outputs the ECC block address shown in FIG. The write clock write timing generator 13 generates 186 recording write clocks per one wobble signal that is phase-synchronized with the wobble signal and the prepit signal, and outputs the generated write clocks to the encoder 14. Further, the write clock write timing generator 13 counts the result of extracting the ECC block address from the prepit decoder 12 and the generated write clock based on the prepit sync code B0 at the head of the ECC block shown in FIG. Controls the timing of recording the recording data.

In the case of detecting the recording start position, the recording position detection unit 15 detects the presence of the RF signal from the RF signal reproduction unit 6 and is the write timing signal of the write clock write timing generation unit 13 when detecting the presence of the RF signal. Then, the ECC block address shown in FIG. 4 and the count number of the write clock from the pre-pit sync code B0 at the head of the ECC block are read to detect the recording start position. The CPU 8 outputs the information of the recording start position to the outside via the interface 9. In the case of detecting the recording end position, the recording position detection unit 15 is the write timing signal of the write clock write timing generation unit 13 when detecting that the RF signal from the RF signal reproduction unit has disappeared. And the write clock count from the pre-pit sync code B0 at the head of the ECC block is read to detect the recording end position. C
The PU 8 transmits the information of the recording end position to the interface 9.
Output to the outside via. The encoder 14 converts data input from the outside via the interface 9 into digital data to be recorded, and converts the data into digital data to be recorded.
6 is output.

Next, the detection of the pre-write recording position will be specifically described with reference to FIGS. FIG. 4A is a waveform diagram of the push-pull signal output from the head amplifier 5 of FIG. 1, and FIG.
FIG. 4 is a waveform diagram of an RF signal output from the ASIC. (C) of FIG.
7A is a waveform diagram of a pre-pit signal obtained from the push-pull signal by the pre-pit detection unit 11, and FIG. 8D is a waveform diagram of an RF detection signal obtained from the RF signal by the RF signal reproduction unit 6 detecting the presence or absence of the RF signal. FIG. 4E is a time chart of the decoding result of the pre-pit decoder 12 that decodes the pre-pit signal obtained from the pre-pit detection unit 11.

A series of pre-pit signals representing the address of the reproduced ECC block is actually obtained from the ECC block.
After playing back the CC block. Therefore, the timing at which the decoding result is obtained is delayed by one ECC block. Therefore, the pre-pit decoder 12 obtains the currently reproduced ECC block address by incrementing the ECC block address obtained by newly decoding the previously obtained pre-pit sync code B0 by +1. The write clock write timing generator 1
3 counts the write clock based on the pre-pit sync code B0 at the head of the ECC block obtained by the pre-pit decoder 12, and sends the count result to the recording position detection unit 15. As described above, the write clock is composed of one sync frame 1488T, and since one sync frame is composed of eight wobble signals, the write clock is generated such that the length of each wobble signal is 186T.

The recording position detecting unit 15 is provided with the RF signal reproducing unit 6
4 at the rising and falling timings of the RF detection signal obtained from the write clock write timing generator 13 shown in FIG.
The write clock is counted based on the CC block address and the pre-pit sync code B0 at the head of the ECC block. Based on the count result, the recording position detection unit 15 can obtain the recording start position and the recording end position. Information on the recording start position and the recording end position can be output to the outside via the interface 9. Thus, on the external host side, for example, in the prewrite inspection, it is determined whether the recording start position is within 256T ± 7T of the ECC block address FFD0E0h and the recording end position is 288 ± 7T of FFD01Fh.
Can be checked individually.

As described above, according to the optical disk device of the first embodiment, the recording start position and the recording end position based on the recording position information of the recorded data recorded on the optical disk can be output to the outside. As a result, the PC is connected to the external interface of the optical disk device, and the PC can read the recording position information and check the recording start position and the recording end position of the recorded data. As a result, it is possible to confirm whether the recording start position and the recording end position are correct for the recorded data whose contents are known in advance.

Further, in the optical disk device of the first embodiment,
The description has been given of the example in which the recording start position and the recording end position of the recorded data are read out to the outside via the interface 9 and whether the recording has been performed at the correct position outside is described. However, for data for which a recording position is already defined, such as pre-write information of a DVD-R disc, or for data recorded by itself, the optical disc apparatus itself outputs a result indicating whether or not it is recorded at a correct position. You may do it.

Embodiment 2 FIG. 2 is a block diagram showing a configuration of an optical disk device according to Embodiment 2 of the present invention. The optical disk device according to the second embodiment is obtained by adding a pre-pit SY synchronization detection unit 17 having an SY detection unit 17a to the optical disk device according to the first embodiment. Therefore, the same parts as those in the first embodiment are denoted by the same reference numerals, and duplicate description will be omitted. In FIG. 2, the SY detection unit 17 a
From the binarized signal data of the signal, the timing of the SY area in the 14T frame synchronization signal of FIG. 3 described above in the structure of the control data is detected. The pre-pit SY synchronization detecting section 17 receives the signal of the pre-pit sync code B0 from the pre-pit decoder 12, and outputs the signal to the SY detecting section 17a.
It detects whether or not the signal of the pre-pit sync code B0 is included in the period of the SY area in the 14T frame synchronization signal detected in the step (1), and if not, counts the number of times.

The operation of the optical disk device of the second embodiment configured as described above will be described with reference to FIGS. At the time of recording, the optical pickup 3 records data by irradiating the DVD-R disc 1 with a light beam by a laser drive signal modulated based on the recording data supplied from the laser power control unit 16. When playing,
The optical pickup 3 converts the light beam into D at a constant output power.
It irradiates the VD-R disc 1 and receives the reflected light to convert it into an electric signal. The servo unit 4 controls the optical pickup 3 and the spindle 2 according to a command from the CPU 8. The head amplifier 5 converts the RF signal from the electric signal output from the optical pickup 3 to the RF signal reproducing unit 6, and the push-pull signal to the wobble detecting unit 10 and the pre-pit detecting unit 11.
Output each.

The RF signal reproducing unit 6 converts the RF signal into a binary signal and outputs the binary signal to the SY detecting unit 17a. SY detector 1
7a outputs the detected SY area in the frame synchronization signal to the pre-pit SY detector 17. The CPU 8 outputs data decoded based on the synchronization signal output from the decoder 7 to the outside via the interface 9. The wobble detector 10 detects a wobble signal from the push-pull signal output from the head amplifier 5 and outputs the detected wobble signal to the write clock write timing generator 13. The pre-pit detection unit 11 detects a pre-pit signal from the push-pull signal output from the head amplifier 5 and outputs the pre-pit signal to the write clock write timing generation unit 13 and the pre-pit decoder 12, respectively. Prepit decoder 12
Decodes the pre-pit signal and outputs the ECC shown in FIG.
The block address is output to the write clock write timing generator 13 and the pre-pit sync code B0 is output to the pre-pit SY synchronization detector 17.

Write clock write timing generator 1
3 generates a write clock for recording synchronized in phase with the wobble signal and the pre-pit signal, and outputs the write clock to the encoder 14. Further, the write clock write timing generator 13 counts the result of extracting the ECC block address from the prepit decoder 12 and the generated write clock with reference to the prepit sync code B0 at the head of the ECC block shown in FIG. Thereby, the recording timing is controlled. The pre-pit SY synchronization detecting section 17 outputs a pre-pit sync code B0 from the pre-pit decoder 12 at a timing corresponding to the time width 14T of the RF signal output from the decoder 7 detected by the SY detecting section 17a. It is detected whether it is within the period of the SY area in the synchronization signal. Further, the pre-pit SY synchronization detecting section 17 determines that the timing at which the pre-pit sync code B0 is output is the 14T frame synchronization signal S of the RF signal.
If it is outside the period of the Y area, the number of times is counted.
The CPU 8 outputs the counted number to the outside via the interface 9. The count can be reset from the outside via the interface 9. The encoder 14 converts data input from the outside via the interface 9 into digital data to be recorded, and outputs the digital data to the laser power control unit 16.

As described above, the optical disk device of the second embodiment includes the SY area in the frame synchronization signal of the RF signal of the recorded data recorded on the DVD-R disk and the DV signal.
It is detected that the position of the pre-pit sync code B0, which is the reference position signal of the recording position information of the DR disk, is within a predetermined period. Then, 14 of the recorded data
If the pre-pit sync code B0 does not exist within the period of the area of the T frame synchronization signal SY, the number of times can be counted and the count result can be output to the outside. Thus, it is possible to confirm whether or not the recorded data of the DVD-R disc has been recorded at the correct position, and a PC (not shown) connected to the external interface 9 reads the recording position information and records the recording data at the correct position. You can check if you can do it.

In the second embodiment, the verification result of the recording position of the recorded data is read out to the outside via the interface 9, and it is confirmed whether the data has been recorded at the correct position outside. However, as an alternative, the result of whether or not the optical disc device itself is recorded at a correct position may be output.

[0038]

As described above in detail in the embodiments,
According to the optical disk device of the present invention, the recording position information of the recorded data recorded on the optical disk is read out of the optical disk device, and the recorded data is
-It is possible to easily confirm whether or not the data is recorded at a correct position on the R disk. By using this optical disk device for prewriting in a DVD-R desk manufacturing process, prewrite recording and verification of the recording position can be performed by the same DVD-R drive. As a result, the manufacturing time of the DVD-R disk can be reduced, and the manufacturing cost can be reduced.

[Brief description of the drawings]

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

FIG. 2 is a block diagram illustrating a configuration of an optical disk device according to a second embodiment of the present invention.

FIG. 3 is a diagram showing a configuration of a pre-write area of a DVD-R disc.

4A and 4B are diagrams for explaining a method of detecting a recorded area of a DVD-R disc; FIG. 4A is a waveform diagram of a push-pull signal output from the head amplifier in FIG. (C) Waveform diagram of pre-pit signal obtained by pre-pit detection section (D) Waveform diagram of RF detection signal detecting presence / absence of RF signal (E) Diagram showing decoding result of pre-pit decoder

[Explanation of symbols]

 Reference Signs List 1 DVD-R disc 2 spindle 3 optical pickup 4 servo unit 5 head amplifier 6 RF signal reproducing unit 7 decoder 8 CPU 9 interface 10 wobble detecting unit 11 prepit detecting unit 12 prepit decoder 13 write clock write timing generating unit 14 encoder 15 recording Position detector 16 Laser power controller 17 Pre-pit SY synchronization detector 17a SY detector

Claims (6)

[Claims] 1. An optical disk in which a wobble signal of a predetermined frequency wobbling along a recording track and a prepit signal having a predetermined phase relationship with the wobble signal and having address information of a recording position are formed. An optical disc device for reproducing data recorded based on a clock signal phase-synchronized with a wobble signal, comprising: a wobble detection unit for extracting the wobble signal; and the clock phase-synchronized with the wobble signal extracted by the wobble detection unit. Clock generating means for generating a signal; pre-pit detecting means for extracting the pre-pit signal; pre-pit decoding means for decoding the pre-pit signal extracted by the pre-pit detecting means to output the address information of the optical disc; And the address information and the Playback position generating means for generating playback position information of the optical disk in response to a playback signal, recorded data detection means for detecting the presence or absence of recorded data during playback, and external interface means for inputting / outputting information to / from the outside. Optical disk device equipped with 2. A start position of recorded data and an end position of recorded data based on the reproduction position information generated by the reproduction position generation unit when the recorded data detection unit detects the recorded data. 2. The optical disk device according to claim 1, wherein the data is output to the outside through the external interface means. 3. A recorded data synchronization detecting means for detecting that a frame sync bit of the pre-pit signal of the optical disk is within a predetermined period of a frame synchronization signal inserted for each recording unit of the recorded data, A counting unit for counting the number of absent frame sync bits when the frame sync bit of the pre-pit signal is not within a predetermined period of the frame sync signal based on a detection result of the recorded data synchronization detection unit. Item 2. The optical disk device according to item 1. 4. The optical disk device according to claim 3, wherein the count result of said counting section is output to the outside through said external interface means. 5. When the recording position and the recording information amount of the recorded data have been input in advance to the optical disk device, the recorded data is reproduced, and the start position of the recorded data and the recording position are recorded. 4. The optical disk device itself determines that the recorded data is recorded at a correct recording position by detecting an end position of the recorded data and the count result. Optical disk device. 6. When confirming the recording position of the recorded data recorded by the optical disk device, the recorded data is reproduced, and the start position of the recorded data, the end position of the recorded data, and the count are determined. 4. The optical disc device according to claim 1, wherein the optical disc device itself determines that the recorded data is recorded at a correct recording position by detecting the result.