JP2002183974A - Optical disk device and its control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical disk device that enables packet write even on an optical disk for a process such as 'minimally blank' and to provide the control method for this device. SOLUTION: This device records, on a prescribed recoding means, the positional information of a position for starting the recording of a following block and holds the information. In addition, as a precondition of such a process, if an erasing process in which the record of a data region is defined as erased by the erasure of the data in the control region, is executed, a prescribed identifying information is set to start a writing process.

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 a method for controlling the optical disk device, and more particularly, to a CD-RW.
The present invention can be applied to a rewritable optical disk such as (CD-Rewritable). According to the present invention, the recording of the data area is erased by recording and holding the position information of the recording start position of the subsequent block in a predetermined recording means, and as a premise of such processing, by erasing the data of the management area. When the erasing process is performed, predetermined identification information is set, and the writing process is started based on the identification information. To be able to.

[0002]

2. Description of the Related Art Hitherto, in an optical disk device, data has been repeatedly added by a packet write method, whereby the device is used as a storage device of a computer or the like to ensure the same usability as a hard disk device or the like.

That is, in the packet write, data to be recorded is divided into packets of a predetermined data amount unit and packetized, and data is additionally recorded on the optical disk in units of the packets. At this time, in the packet write, the end of the recorded area is detected from the optical disk, and each packet is sequentially added from the end.

[0004] Among the optical disks on which desired data is recorded by packet writing in this way, in a CD-RW which is a rewritable optical disk, a recorded optical disk is initialized by blank processing, and no data is recorded. Not intended to be used as an optical disc.

That is, as shown in FIG.
In an RW optical disk, PMA (Progra
m Memory Area) is set. Where PMA
Records management information for managing indexes and tracks of the optical disk. Subsequently, on the optical disk, TOC (Table Of Content), which is management information of the data area, is recorded on the outer peripheral side, and the subsequent outer peripheral side is set as the data area. In the case of packet writing, data is recorded in packet units sequentially from the inner side of the data area. In FIG. 6, presence / absence indicates a state where data is recorded and a state where data is erased, respectively.

In an optical disc having such a configuration, in blank processing, as shown in FIG. 6B, PMA, a laser beam is applied to the entire outer peripheral side from the lead-in area, and recorded data is written. There is a method of completely erasing (Full Blank), and this method has a drawback that processing requires time.

On the other hand, in the processing of this blank, there is also a processing called a so-called minimally blank. In this processing, as shown in FIG.
The optical disk is initialized by irradiating the MA and the lead-in area with a laser beam and selectively setting only these areas to an unrecorded state. In the processing of the minimal blank, the time required for the processing can be remarkably shortened as compared with the case of the full blank.

When data is recorded by packet writing on a CD-RW optical disk, an initialization process is executed by a full blank process of completely erasing recorded data, out of these blank processes. As shown in FIG. 6D, when a packet is additionally recorded, an unrecorded portion following the recorded area can be detected and the packet can be additionally recorded.

[0009]

By the way, even when data is recorded by packet writing, if blank processing can be performed by minimally blanking, the time required for blank processing is significantly reduced. It is considered that the shortening of the length makes it possible to improve the usability of this type of optical disk as compared with the related art.

[0010] However, in an optical disk by the processing of the minimally blank, as shown in FIG.
By erasing the recorded data in the data area by overwriting, in the case of packet writing, it becomes difficult to detect the end position of the area where the data is effectively recorded, which is the next write start position, and eventually However, there has been a problem that it is difficult to use an optical disk with a minimally blank.

Incidentally, in the conventional optical disk device, at the start of packet writing, the head of the data area (TDB (Track
If any data exists immediately after Descriptor Brock), the optical disc is determined to be an optical disk by processing a minimally blank, and the data is completely erased by using a full blank before use.

On the other hand, as one method for solving this problem, it is possible to detect the end position of such an area where data is effectively recorded by recording TOC, PMA, etc., as in an optical disk. However, in the case of CD-RW, the number of recordings is limited, and in the case of packet writing, frequent recording is repeated.
If it is possible to detect the end position of such an area where data is effectively recorded by recording C, PMA, etc., it becomes difficult to use the optical disc in an extremely short time.

The present invention has been made in view of the above points, and it is an object of the present invention to propose an optical disk apparatus capable of performing packet writing even on an optical disk related to processing of a minimally blank or the like, and a control method of the optical disk apparatus. Is what you do.

[0014]

According to the first aspect of the present invention, the present invention is applied to an optical disk apparatus for accessing a rewritable optical disk, and the position information of the recording start position of a subsequent block is recorded in a predetermined recording area. Means, and based on the position information recorded in the recording means,
While recording the block following the previous recording start position,
The position information recorded in the recording means is updated.

In the invention according to the eighth aspect, the present invention is applied to an optical disk apparatus for accessing a rewritable optical disk, and an erasing process is performed in which the data in the management area is erased by deleting the data in the management area. In
In the writing process, predetermined identification information is set, and based on this identification information, at a portion where recorded data exists from the beginning of the data area, the recorded data is erased by overwriting and the desired data is deleted. The data is recorded in a predetermined block unit, the position information of the recording start position of the subsequent block is recorded in a predetermined recording means, the setting of the identification information is updated, and the position information recorded in the recording means is used as a reference. And the position information recorded in the recording means is updated.

In the twentieth aspect, the present invention is applied to a control method of an optical disk apparatus, and records position information of a recording start position of a subsequent block in a predetermined recording means, and records the position information recorded in the predetermined recording means. Based on the information, the block following the previous recording start position is recorded, and the position information recorded in the recording means is updated.

According to the twenty-first aspect of the present invention, when the erasing process is performed by erasing the data in the management area by executing the erasing process by erasing the data in the management area, In the writing process, based on this identification information, in the portion where the recorded data exists, from the beginning of the data area, while erasing the recorded data by overwriting the desired data, Is recorded in a predetermined block unit, the position information of the recording start position of the subsequent block is recorded in a predetermined recording unit, the setting of the identification information is updated, and recording is started based on the position information recorded in the recording unit. The block following the position is recorded, and the position information recorded in the recording means is updated.

According to the first aspect of the present invention, the position information of the recording start position of the subsequent block is recorded in a predetermined recording means, and the position information recorded in the recording means is used as a reference to the position of the preceding recording start position. By recording the subsequent block and updating the position information recorded in the recording means, even when data is recorded in the data area by overwriting, the recording start position of the subsequent block is detected by the position information recorded in the recording means. Even if the optical disk is subjected to processing such as minimal blank in which unerased data remains in the user area, packet writing can be performed.

According to the eighth aspect of the present invention, when an erasing process for erasing the recording of the data area is performed by erasing the data of the management area, predetermined identification information is set. Even if the optical disk is used for processing such as a minimal blank with unerased data remaining in the user area, determine whether the remaining data is valid or should be regarded as erased based on the identification information. Can be. Thereby, based on this identification information, from the beginning of the data area, in a portion where recorded data exists, by erasing the recorded data by overwriting and recording desired data in a predetermined block unit. , Packet write and the like can be started correctly. At this time, the position information of the recording start position of the succeeding block is recorded in a predetermined recording unit, and the setting of the identification information is updated. Based on the position information recorded in the recording unit, the position information is continued from the previous recording start position. By recording the block and updating the position information recorded in the recording means, even when data is recorded in the data area by overwriting, the recording start position of the subsequent block is detected by the position information recorded in the recording means. Recording can be performed, so that packet writing can be performed even on an optical disc that is subjected to processing such as minimal blank in which unerased data remains in the user area.

Thus, according to the configuration of claim 20 or claim 21, it is possible to obtain a method of controlling an optical disk device that can perform packet writing even on an optical disk related to processing of a minimally blank or the like.

[0021]

Embodiments of the present invention will be described below in detail with reference to the drawings.

(1) First Embodiment (1-1) Configuration of First Embodiment FIG. 2 is a block diagram showing an optical disk device according to a first embodiment of the present invention. This optical disc device 1
The optical disk 3 is accessed under the control of the host computer 2. The optical disk 3 to be accessed in the optical disk apparatus 1 includes a CD, a CD-ROM, and a CD in which audio signals that are a so-called CD family are recorded.
-R, CD-RW and the like.

That is, in the optical disk device 1,
The spindle motor 4 drives the optical disc 3 to rotate at a predetermined rotation speed by driving the spindle driver 6 under the control of the servo control circuit 5. Here, the spindle driver 6 is a driver for driving the spindle motor 4. The thread motor 7 moves the optical pickup 9 in the radial direction of the optical disc 3 by driving the thread driver 8 under the control of the servo control circuit 5. Here, the thread driver 8 is a driver for driving the thread motor 7.

The optical pickup 9 emits a laser beam from a built-in semiconductor laser, and irradiates the laser beam to the information recording surface of the optical disk 3 via an objective lens. The return light obtained by this laser beam irradiation is received by a predetermined light receiving element via an objective lens. The optical pickup 9 performs a current-voltage conversion process on the light-receiving result of the light-receiving element, and then performs a matrix operation process, whereby the signal level changes according to the tracking error amount and the signal level changes according to the focus error amount. A servo error signal S1 based on a changing focus error signal, a push-pull signal S2 whose signal level changes in accordance with the meandering of a groove formed on the optical disc 3, a reproduced signal whose signal level changes in accordance with the presence or absence of a pit, and the like are generated. Output.

In the optical pickup 9, an objective lens for processing such a laser beam and return light is held by a biaxial actuator, and the biaxial actuator is driven by a biaxial actuator driver 10 under the control of the servo control circuit 5. It has been made to be. Here, the biaxial actuator driver 10 is a driver that drives the biaxial actuator. Thereby, the optical pickup 9
Are designed to perform tracking control and focus control.

Further, the optical pickup 9 raises the light amount of the laser beam irradiating the optical disc 3 at a predetermined timing, thereby forming a pit row on the optical disc 3 to record desired data, and further forming the pit row on the optical disc 3. The data recorded on the optical disk can be erased by erasing the pit sequence that has been written.

The RFAMP unit 12 amplifies the output signal of the optical pickup 9 with a predetermined gain and outputs the signal. That is, the RFAMP unit 12 amplifies the servo error signal S1 and outputs the amplified signal to the servo control circuit 5, and the push-pull signal S2
Is amplified and output to the ATIP decoder 13. On the other hand, the reproduced signal is amplified by a predetermined gain to be binarized, and the resulting binarized signal S3 is decoded by the decoder unit 14.
Output to Further, in addition to these processes, the RFAMP unit 12 determines the signal level of the reproduction signal based on a predetermined threshold value, thereby generating a determination signal for determining the type of the optical disc 3 based on the reflectance of the optical disc 3. And
This determination signal is output to the central processing unit (CPU) 15. In addition, a detection signal S4 for detecting an unrecorded area based on the presence or absence of a pit row is generated by the same determination of the amplitude of the reproduction signal and output to the central processing unit 15. Thus, in the optical disk device 1, the unrecorded area of the optical disk 3 can be detected by the central processing unit 15 by the detection signal S4.

The RFAMP unit 12 has a driving circuit for a semiconductor laser, and the driving circuit
By driving the semiconductor laser according to the output data D2 of 3 or with reference to a predetermined signal level, the light amount of the laser beam output from the optical pickup 9 is raised at the time of writing or erasing.

The ATIP decoder 13 is an RFAMP unit 1
By decoding the push-pull signal S2 obtained from the optical disk 3, the absolute time information (ATIP: Absolute) which is the position information recorded on the optical disc 3 by the meandering of the groove.
Time In Pre-Groove) and Central Processing Unit 1
5 is output. As a result, in the optical disk device 1,
The central processing unit 15 can acquire the position information of the laser beam irradiation position.

When such absolute time information cannot be detected, the ATIP decoder 13 outputs a discrimination signal to that effect, so that the central processing unit 15 discriminates the type of the optical disc 3 based on this discrimination signal. It can be so. Further, the ATIP decoder 13 processes the push-pull signal S2 by generating a clock by a built-in PLL circuit when executing these processes, so that the optical disc device 1 records any data on the optical disc 3. If not, it operates based on this clock.

The servo control circuit 5 receives a servo error signal S1 obtained from the optical pickup 9 via the RFAMP unit 12, and operates the two-axis actuator driver 10 so that the servo error signal S1 has a predetermined signal level. Control. Thus, in the optical disc device 1, a servo loop is formed to perform tracking control and focus control.

Further, the servo control circuit 5 controls the operation of the thread driver 8 under the control of the central processing unit 15 based on the position information obtained from the ATIP decoder 13, thereby controlling the location specified by the central processing unit 15. The optical pickup 9 is caused to seek. The servo control circuit 5 controls the operation of the spindle driver 6 under the control of the central processing unit 15 based on the position information obtained from the similar ATIP decoder 13, thereby driving the optical disc 3 to rotate at a predetermined rotation speed. I do.

The decoder section 14 processes the binarized signal S3 output from the RFAMP section 12 to process the optical disc 3
Play the data recorded in the. That is, the decoder unit 1
4, a PLL (Phase Locked Loop) circuit 16
Generates a clock based on the binarized signal S3,
The YNC detection circuit 17 sequentially latches the binarized signal S3 based on the clock to generate a serial data string, compares the serial data with a predetermined pattern, and detects a synchronization pattern from the serial data string. To detect.

EFM (eight to fourteen Modulation)
The demodulation circuit 18 fetches the serial data sequence based on the timing of the detection of the synchronous pattern, performs EFM demodulation, and outputs demodulated data as a processing result. CIR
A C (Cross Interleave Reed-Solomon) 19 deinterleaves and error-corrects the decoded data and outputs it. A layered ECC (Error Correcting Code) circuit 20 further corrects the output data.

With these processes, the decoder section 14 processes the output signal of the optical pickup 9 to perform signal processing on the optical disc 3.
The user data recorded in the device can be reproduced. In this series of processing, the decoder unit 14
The output data of the EFM demodulation circuit 18 is fetched at a predetermined timing and selectively processed, thereby obtaining a subcode recorded on the optical disk 3 and notifying the central processing unit 15 of the subcode. Here, in this sub-code, a code indicating a logical erasure state (so-called logical erasure) can be set, so that the central processing unit 15 can determine the location of the logical erasure by this sub-code. Has also been made detectable. Incidentally, the logical erase state is executed by setting the mode 0. Further, the decoder unit 14 reproduces TOC data, PMA data and the like by the same processing and outputs the data to the central processing unit 15.

In the decoder section 14, the processing is switched according to the optical disk 3 under the control of the central processing unit 15, or the processing is partially stopped, thereby, for example, when the optical disk 3 is a compact disk on which an audio signal is recorded. , The user data obtained from the CIRC decoder 19 is directly output to the following interface 22 so that processing corresponding to the optical disc 3 can be executed.

The interface (I / F) 22 is an interface with a host device, and transmits various commands output from the host computer 2 to the central processing unit 1.
Notify 5 Also, a response to the command notification is received from the central processing unit 15, and the response is output to the host computer 2. Also, the interface 22
The user data D4 reproduced from the optical disk 3 is received from the decoder unit 14 and output to the host computer 2.
Conversely, it receives the user data D1 output from the host computer 2 and outputs it to the encoder unit 23. The interface 22 executes input / output processing of the user data D1 and D4 via the buffer memory 24.

The encoder 23 processes the user data D1 thus obtained from the interface 22 in a predetermined format and outputs output data D2. That is, in the encoder unit 23, the layered E
The CC circuit 25 sequentially divides the user data into predetermined data units, adds an error correction code to each block, and outputs the blocks. The CIRC encoder 26 adds an error correction code to the output data of the layered ECC circuit 25,
The data is further interleaved and output. The EFM modulation circuit 27 performs EFM modulation on the output data of the CIRC encoder 26. The encoder unit 23 inserts a synchronization pattern into the output data of the EFM modulation circuit 27 at a predetermined timing, and outputs the processing results as a serial data string. Further, the encoder unit 23 switches the processing and the like in the layered ECC circuit 25 under the control of the central processing unit 15, whereby it can correspond to various formats of the optical disc 3. In the optical disk device 1, the encoder unit 2 obtained in this manner
The optical pickup 9 is driven by the output data D2 of No. 3 so that desired data can be recorded.

In these processes, the encoder unit 23
Generates the output data D2 by encoding the sub-code output from the central processing unit 15 instead of the user data at a predetermined timing. Thereby, in the optical disc apparatus 1, not only physical data erasure by irradiating a laser beam to erase a pit row, but also
By setting the sub-code, the logical erasing process can be executed.

The memory 30 records and holds data such as the disk ID and TOC of the optical disk 3 obtained from the decoder unit 14 under the control of the central processing unit 15.

The central processing unit 15 is a control circuit for controlling the operation of the entire optical disc apparatus 1, and when the loading of the optical disc 3 is detected by a detection mechanism (not shown).
The operation of the servo control circuit 5 is controlled to start the rotation of the optical disc 3. Further, the central processing unit 15 moves the optical pickup 9 to the inner peripheral side of the optical disc 3, the lead-in area,
The PMA seeks to acquire various information obtained from these areas. Here, these information are PMA,
TOC is the above-described various determination signals. From these, the central processing unit 15 determines the type of the optical disc 3 and
Information necessary for accessing the optical disk 3 is stored in the memory 30.
Expand to and hold.

In these processes, the optical disc 3
In the case of D-RW, the central processing unit 15 causes the optical pickup 9 to seek to the outer peripheral side of the lead-out area, and checks for the presence or absence of an identification code or a special pattern indicating that the optical disk is for an optical disk for processing a minimally blank described later. Detect and record the detection result in the memory 30. Also RFAM
Discrimination signal S4 output from P section 12 and decoder section 1
Based on the subcode output from the optical disk 3, the PMA, the presence or absence of physical erasure and logical erasure of the lead-in area, and the end of user data recorded in the user area are detected. Is detected and recorded in the memory 30.

In response to a request from the host computer 2, the central processing unit 15 notifies the host computer 2 of information on the type of the optical disk 3 thus detected at the time of loading the optical disk 3, information on the state, and the like. In the computer 2, the type of the optical disc 3,
Processing according to the state can be executed.

That is, when the loaded optical disk 3 is a compact disk on which an audio signal is recorded, the host computer 2 automatically reproduces the compact disk in accordance with the user's setting by notifying such information. Instruct. In this case, the central processing unit 15 accesses the TOC recorded in the memory 30 according to the instruction, and instructs the reproduction of the optical disk 3. If the identification code or the special pattern described above is detected, it is notified that the disc is an optical disc related to the processing of the minimally blank.
Is notified that no data is recorded in the optical disk 3. On the other hand, when the identification code or the special pattern described above is not detected,
When the PMA and the TOC are erased, a part related to physical or theoretical deletion is detected from the head of the user area, and the free space and the used capacity are notified based on the position information of the detected position.

In these processes, when the optical disk 3 is a CD-RW and a full blank command is input from the host computer 2, the central processing unit 15 executes the processing under the control of the servo control circuit 5. 6
As described above for (A) and (B), PMA, T
The OC and all the recorded data are erased and a full blank process is executed. At this time, the central processing unit 15 erases the user data by erasing the above-described physical pit row or by logical erasing according to an instruction from the host computer 2.

Similarly, when a minimally blank command is input when the optical disk 3 is a CD-RW, the central processing unit 15 controls the servo control circuit 5 and the like to control the central processing unit 15 as shown in FIGS. As shown in B), PM
A, TOC is erased and a minimally blank process is executed. As a result, the central processing unit 15 executes the processing of the minimally blank under the same control as in the related art.

Further, the central processing unit 15 causes the optical pickup 9 to seek outside the lead-out area, and in the seek destination area, an identification code or a special pattern indicating that the optical disk is an optical disk for processing a minimally blank. Record. As a result, the optical disc device 1 can confirm whether the data recorded in the data area is valid or should be handled as erased data by the information recorded outside the lead-out area.

Thus, in the packet write immediately after the minimally blanking process, the central processing unit 15 sets the user data from the top of the data area for the optical disc 3 on which such an identification code or a special pattern is recorded. Record Further, after recording the user data in this manner, the recording of such an identification code or a special pattern is erased.

That is, FIG. 3 shows that the optical disk 3 is a CD-R
11 is a flowchart showing a processing procedure of the central processing unit 15 when a write instruction by packet writing is input from the host computer 2 in the case of W. That is, when a command is input, the central processing unit 15
Moves from step SP1 to step SP2, where the memory 30 is accessed to obtain information necessary for determining whether or not the optical disk 3 is used for the processing of the minimally blank in the optical disk device 1. Here, this information is whether or not an identification code or a special pattern is recorded.

Further, in the following step SP3, the central processing unit 15 determines whether or not the optical disk 3 is for the processing of the minimally blank by the optical disk device 1 based on the obtained information. Here, when an identification code or a special pattern is detected on the outer peripheral side of the lead-out area, the central processing unit 15 determines in step SP3 that the optical disc 3 is for the minimally blanking process of the optical disc apparatus 1. A positive result is obtained, and the routine goes to step SP4.

Here, the central processing unit 15 determines the data write start position. Here, in this case, since the identification code or the special pattern is held as recorded, the optical disc 3 is the one that is minimally blank and has no data recorded in the data area. Thereby, the central processing unit 15 sets the head of the data area to the recording start position.

After setting the recording start position in this way, the central processing unit 15 proceeds to step SP5,
From this recording start position, user data is recorded by packet writing. Further, in this case, the central processing unit 1
5 controls the operation of the servo control circuit 5 so as to erase the identification code or the special pattern indicating the processing of the minimally blank on the outer peripheral side of the lead-in area, as described above.

When the packet is recorded in this manner, the central processing unit 15 proceeds to step SP6.
As shown in FIG. 1C, a marker M indicating a writing position of the subsequent data is recorded at the next recording start position, and the subsequent recording start position is recorded on the optical disk 3.

The marker M is set on the information recording surface by physically or logically erasing data in a predetermined area (for example, 10 frames) from the recording start position of the subsequent packet. The setting of the marker M enables the optical disc apparatus 1 to detect the recording start position in the subsequent packet writing even when the user data is recorded by overwriting.

When the marker M indicating the writing position of the subsequent data is recorded in this way, the central processing unit 15
Moves to step SP7, and ends this processing procedure.

On the other hand, if a negative result is obtained in step SP3, the central processing unit 15 proceeds to step SP3.
From step SP8. Here, when a negative result is obtained in step SP3, the optical disk 3
Is the result of the full blank process, the blank process has not been executed yet, or the steps SP1-SP2
This is the case where the identification code or the special pattern is deleted by executing the processing procedure of -SP3-SP4-SP5-SP6-SP7. These optical disks 3
In either case, an unrecorded area is arranged at the end of valid user data, or an area physically or logically erased is formed.

In this case, the central processing unit 15 instructs the servo control circuit 5 to search the data area in step SP 8, and the reproduction detected by the RFAMP section 12 from the reproduction result obtained from the decoder section 14. From the determination signal S4 based on the signal, the head of an area where data is not effectively recorded (an area where data is physically erased or an area related to logical erasure) is detected. As a result, the central processing unit 15 detects the end of the data recorded in the data area for an optical disk related to a full blank or an optical disk on which blank processing has not yet been performed. For the optical disc 3 on which the marker M is recorded, the recording start position of the marker M is detected.

The central processing unit 15 sets the position thus detected as the recording start position, and then proceeds to step S
At P5, data input from the host computer 2 is sequentially recorded by packet writing. After recording the marker M again in the subsequent step SP6, the process moves to step SP7 and ends this processing procedure.

Thus, in the case of the optical disc 3 on which the marker M is recorded by the minimally blanking process, the central processing unit 15 overwrites the marker M and the following user data by overwriting the output of the host computer 2. The data is recorded on the optical disc 3.

The central processing unit 15 forms and processes PMA and TOC in the same manner as in the related art so that the optical disk 3 thus packet-written can be accessed by another optical disk apparatus. Has been made.

(1-2) Operation of First Embodiment In the above configuration, when the optical disk 3 is loaded in the optical disk device 1 (FIG. 1), the optical pickup 9 is controlled by the central processing unit 15. Seeks to the inner peripheral side of the optical disk 3, the PMA on the inner peripheral side, the PMA and TOC recorded in the lead-in area are reproduced, and a determination signal for determining the type of the optical disk 3 based on the reflectance of the optical disk 3 is detected. You. Further, the optical pickup 9 seeks to the outer periphery of the lead-out area, and in this area, an identification code indicating that the optical disk device 1 is an optical disk related to the processing of the minimally blank, and the presence or absence of a special pattern are detected.

In the optical disk device 1, the type of the optical disk 3 is determined based on the various information thus detected, and the determination result is notified to the host computer 2 by access from the host computer 2. The volume and capacity of the optical disk 3 are notified by access from the host computer 2 as necessary, and the file name and the like recorded on the optical disk 3 are notified to the host computer 2 by access to the optical disk 3.

When a full blank command is input from the host computer 2 when executing a series of processing in this manner, the optical disk device 1 emits a laser beam from the optical pickup 9 according to the light amount at the time of erasing. By sequentially scanning the PMA, the lead-in area, and the data area of the optical disk 3, the pits are physically erased, and the user data and PM recorded on the optical disk 3 are deleted.
A, data in the lead-in area is erased (FIG. 6)
(A) and (B))). If the user has specified logical erasure instead of such erasure,
In response to an instruction from the host computer 2, these processes are executed by logical erasure by rewriting the subcode.

On the other hand, when a minimally blank command is input from the host computer 2, the PMA and the lead-in area of the optical disk 3 are similarly erased, and
The processing of the minimally blank is performed. At this time, in the optical disk device 1, the identification information indicates that the user data left in the data area is to be regarded as erased, and the identification code or the identification code indicating that the optical disk is a minimally blanked optical disk. A special pattern is recorded on the outer periphery of the lead-out of the optical disc 3.

In the optical disk device 1, by recording the identification information indicating that the user data is invalid, packet writing can be started from the beginning of the data area based on the identification information. As a result, in the optical disk device 1, even for an optical disk related to processing such as minimally blank, packet writing can be performed by overwriting without full blanking.
Accordingly, the time required for processing can be shortened.

In the packet write, by recording the marker M indicating the recording start position of the subsequent packet and terminating the packet write, even if the overwriting is performed based on the marker M, the recording start position of the subsequent packet can be changed. It is possible to detect, and without doing a full blank, packet writing can be performed by overwriting the optical disc according to the processing of the minimally blank,
Accordingly, the time required for processing can be shortened.

That is, when the optical disk 3 is a new optical disk or an optical disk relating to a full blank, in the optical disk apparatus 1, the central processing unit 15 (FIG. 3) executes a step SP1 for each packet write command.
The processing procedure of -SP2-SP3-SP8-SP5-SP6-SP7 is repeated, whereby the user data is recorded in packets sequentially from the beginning of the data area, and packet writing is repeated.

On the other hand, in the optical disk 3 subjected to the minimally blank processing by the optical disk apparatus 1, the first packet write command causes the steps SP1-SP2-SP3-SP4-SP5-SP6-S
The processing procedure of P7 is executed, user data is recorded from the beginning of the data area, and the marker M
Is recorded. Also, the identification code or special pattern recorded on the outer periphery of the lead-out is erased.

After the subsequent packet write command, steps SP1-SP2-SP3-SP8-SP5-SP6-SP are executed for each packet write command.
The processing procedure of P7 is repeated, whereby packets are sequentially recorded from the recording position of the marker M, and the marker M is recorded again at the end of the data area so as to correspond to the recording of this packet.

In this way, the identification code or the special pattern recorded on the optical disk 3 in this manner is recorded once by the minimally blanking process, and then erased by the packet write.
The number of times of rewriting is extremely smaller than the number of times of packet writing. As a result, a situation in which the characteristics of the information recording surface deteriorates due to the recording of the identification code and the special pattern of this kind and the optical disk 3 becomes difficult to use can be sufficiently avoided in practical use.

Also, in the recording of the marker M, it is rare that the information is repeatedly recorded in the same place, so that the characteristics of the information recording surface are deteriorated by the recording of the marker M, and the optical disk 3 becomes difficult to use. Can be sufficiently avoided in practical use.

In practice, depending on the processing speed of the optical disk device, a full blank requires a processing time of about 30 to 60 minutes, whereas a minimum blank of about 1 minute takes such processing time. , The processing can be completed, and in this embodiment, the actual data recording can be started in a short time.

By recording an identification code indicating a minimal blank and a special pattern on the outer periphery of the lead-out area, a so-called open state TOC,
In the absence of PMA recording, even if a system reset or disk exchange occurs, individual optical disks 3 can be distinguished, so that packet writing can be performed without each full blank.

(1-3) Effects of the First Embodiment According to the above configuration, the position information of the recording start position of the block following the recording of the marker M is recorded on the optical disk, so that the packet is written by overwriting. Even in such a case, consecutive packets can be correctly recorded, so that packet writing can be performed even on an optical disc related to processing such as minimal blank.

Further, by recording the position information of the recording start position on the optical disk by using the marker, packet writing can be similarly performed even when the same type of optical disk device is loaded with the optical disk.

By executing this marker by physically erasing or logically erasing data, a simple configuration in which the control procedure by the central processing unit is simply switched, and in some cases, the host computer 2 By changing the processing procedure, packet writing can be performed even on an optical disk related to the processing of a minimally blank.

By setting identification information by an identification code or a special pattern on the outer peripheral side of the lead-out area by the processing of the minimally blank, the validity of the information in the data area can be determined based on the identification information. Thus, according to the identification information, the recorded data is erased from the beginning of the data area by overwriting, and the packet write is performed while recording the position information. be able to.

At this time, the identification information is recorded on the optical disk, and is recorded on the optical disk when the optical disk is ejected. Even if you use it loaded in
Packet writing is possible.

Further, once the packet is written, the identification information is deleted, so that in the subsequent processing, the recording start position can be determined based on the marker M recorded on the optical disk, and the processing can be performed. Thus, continuous packets can be recorded.

By recording the identification information outside the lead-out area in this way, the identification information can be recorded without affecting the format of the optical disk at all.

(2) Second Embodiment In this embodiment, the recording of the information of the recording start position, the identification code or the special pattern described above in the first embodiment is executed in the idle time of the optical disk apparatus. I do.
The optical disk device according to this embodiment is configured in the same manner as the optical disk device 1 of the first embodiment except that the processing of the central processing unit 15 relating to the marker M and the identification information is different. You.

As described above, the information of the recording start position,
If the recording of the identification code or the special pattern is executed in the idle time, the same effect as in the first embodiment can be obtained by effectively utilizing the processing time of the optical disk device.

(3) Third Embodiment In this embodiment, the information on the recording start position, the identification code or the information corresponding to the special pattern described above in the first embodiment is stored in a memory. The processing procedure of FIG. 3 is executed based on the information stored in the memory. When the optical disk 3 is ejected, a marker M and identification information are recorded on the optical disk 3 according to the recording of the data area.
The optical disk device according to this embodiment is configured in the same manner as the optical disk device 1 of the first embodiment except that the processing of the central processing unit 15 relating to the marker M and the identification information is different. You.

As described above, the information on the recording start position,
If the identification code or the information corresponding to the special pattern is stored in the memory and is recorded as needed when the optical disk is ejected, the number of recordings on the optical disk 3 can be reduced accordingly, and the optical disk 3 can be reduced accordingly. , The same effect as in the first embodiment can be obtained.

(4) Fourth Embodiment In this embodiment, instead of recording the identification information by the identification code or the special pattern described above in the first embodiment on the outer peripheral side of the lead-out area, The identification information is recorded in a PMA or the like. In this case, PMA
When a new mode is created to record identification information using an identification code or a special pattern,
A method of recording an identification code or a special pattern in D is conceivable. Further, since the information is to be deleted eventually, it is possible to record the information at a predetermined position, for example, at the end of the data area that is used less frequently.

As described above, even if the identification information is recorded in the area of another optical disk, the same effect as that of the optical disk device of the first embodiment can be obtained.

(5) Fifth Embodiment In this embodiment, instead of recording information necessary for packet write processing in the first embodiment on the optical disk 3, the information is written in an optical disk device. And keep it. It should be noted that the optical disk device according to the present embodiment differs from the optical disk device according to the present embodiment in that processing for recording this information is different, except that a recording unit such as a nonvolatile memory or a hard disk device for recording such information is separately provided. Except for the optical disc device 1 of the first embodiment
Is configured the same as Therefore, in the following description, the configuration of FIG. 2 will be used.

FIG. 4 is a flowchart showing a processing procedure of the central processing unit in the optical disk device according to this embodiment. When a minimally blank command is input from the host computer, the central processing unit erases the PMA and TOC and executes the minimally blank processing. Subsequently, the central processing unit proceeds from step SP11 to step SP12, and records a unique identification code for each optical disc on the optical disc. As a result, the central processing unit records an identification code for identifying the optical disk on the optical disk, and records the identification code on a recording device such as a built-in nonvolatile memory or a hard disk device.

Subsequently, the central processing unit proceeds to step SP
Then, the recording start position of the subsequent packet is determined. In this case, the head of the data area is set to this recording start position. Further, in the following step SP14, the central processing unit records and holds the position information of the recording start position thus detected in the recording means. At this time, the central processing unit records the position information in association with the identification code of the optical disk, processes the other optical disk by this, and then uses the identification code recorded on the optical disk as a reference even if the optical disk is loaded again. Then, by accessing the recording means, the recording start position of the optical disk can be detected. When the position information is recorded in the recording means in this way, the central processing unit proceeds to step SP15 and ends this processing procedure.

FIG. 5 is a flowchart showing a processing procedure of the central processing unit when a packet write command is input. When the command is input, the central processing unit proceeds from step SP21 to step SP22, and acquires the identification code recorded on the optical disc from the information acquired when the optical disc was loaded.

Subsequently, the central processing unit proceeds to step SP
The process proceeds to step 23, where the recording means is accessed on the basis of the identification code to determine whether or not the identification code recorded in the recording means matches the identification code obtained from the optical disk. If a negative result is obtained here, in this case, it can be determined that this optical disk has not been subjected to the minimally blanking process by this optical disk device, and the routine goes to step SP24. Here, the central processing unit detects an area (a physically erased area or an area related to logical erasure) where data is not effectively recorded sequentially from the top of the user area.

The central processing unit proceeds to the next step SP2
In 5, it is determined whether or not an area in which data is not effectively recorded has been detected in the process of step SP24. Here, if a negative result is obtained, in this case, the central processing unit may execute step S
The process shifts to P26, and executes a process for a non-writable optical disk. Here, this process is a process of returning an error status to the host computer in response to the packet write command and notifying the details of the error.
When the processing for the non-writable optical disk is performed in this manner, the central processing unit proceeds to step SP27.
To end the processing procedure.

On the other hand, if a positive result is obtained in step SP25, the central processing unit proceeds to step SP28.
Then, the head position of the area detected in step SP24 is set as the recording start position. Then continue with step SP
The process then proceeds to step 29, where packet writing is performed from the head position thus detected. Subsequently, the central processing unit proceeds to step SP30, and calculates the recording start position of the subsequent packet write. Here, the recording start position of the subsequent packet is set so as to follow the end of the packet recorded in step SP29.

After calculating the subsequent recording start position in this way, the central processing unit proceeds to step SP31,
The position information based on the recording start position is recorded in the recording means. In this case, the central processing unit records the identification code on the optical disk if a unique identification code is not set on the optical disk. The recording means records the position information in association with the identification code of the optical disc. Subsequently, the central processing unit proceeds to step SP32, in which it determines whether or not all the data has been recorded.
Move on to

On the other hand, if a positive result is obtained in step SP23, the central processing unit proceeds to step SP33.
Then, the corresponding position information recorded in the recording means is obtained, the recording start position is set based on the position information, and the routine goes to step SP29.

Thus, for example, an optical disk that has been fully blanked by another optical disk device, an optical disk that has been fully blanked by this optical disk device, and an optical disk on which blank processing has not yet been executed,
Step SP22-SP23-SP24-SP26-S
By executing the processing procedure of P28-SP29-SP30-SP31-SP32, the output data of the host computer is recorded from the beginning of the data area or from the end of the recorded data. At this time, the position information of the subsequent recording start position is recorded and stored in the recording means. Then continue with step SP
22-SP23-SP33-SP29-SP30-SP
The processing procedure of 31-SP32 is executed, whereby the packet write processing is sequentially executed based on the position information recorded in the recording means. Note that the central processing unit executes step SP22-
In the processing of SP23, without accessing the optical disc 3, the
The memory is accessed on the basis of the identification code recorded and held in the storage device to determine the identification code.

On the other hand, for the optical disk subjected to the minimally blank processing by this optical disk device, steps SP22-SP23-SP33-SP29-SP
The processing procedure of 30-SP31-SP32 is executed, and the packet write processing is sequentially executed based on the position information of the recording start position recorded in the recording means.

[0098] Even when the position information is recorded on a recording means different from the optical disk as in this embodiment, the same effect as in the first embodiment can be obtained. In addition, when the information is recorded on a recording unit different from the optical disk, the position information can be acquired in a shorter time than when the information is recorded on the optical disk, so that the access time can be shortened accordingly. .

(6) Other Embodiments In the above-described first to fourth embodiments, when the position information indicating the recording start position is recorded together with the identification information indicating the processing of the minimum blank, In the fifth embodiment, the case where only position information is recorded and held has been described. However, the present invention is not limited to this, and when recording such information on an optical disc, only position information is recorded. Alternatively, conversely, when such information is recorded on a recording means different from the optical disk, the position information and the identification information may be recorded.

In the above-described embodiment, the case has been described in which the identification information is recorded after the minimally blank, and the position information indicating the subsequent recording start position is recorded after the packet write. However, the position information and the identification information may be recorded immediately before each processing.

In the fifth embodiment described above,
The case where the position information is recorded on the optical disk device connected to the host computer has been described. However, the present invention is not limited to this. These pieces of information may be recorded on a computer connected to the computer, and further on an optical disk device connected to the computer. In addition to the devices related to such an optical disk, for example, an IC card mechanism is embedded in an optical disk or an optical disk case,
Such information may be recorded in the mechanism of the IC card.

In the first to fourth embodiments, the case where the position information is recorded on the optical disk by the marker by forming the unrecorded area has been described. However, the present invention is not limited to this, and the present invention is not limited to this. Alternatively, the position information by the marker may be recorded by recording a special code or the like.

In the above-described embodiment, the case where user data is recorded by packet writing has been described. However, the present invention is not limited to this, and can be widely applied to the case where desired data is recorded by overwriting. .

In the above embodiment, the case where the present invention is applied to a CD-RW optical disk device has been described. However, the present invention is not limited to this, and an optical disk device for accessing various recordable / reproducible optical disks. Can be widely applied to.

[0105]

As described above, according to the present invention, the position information of the recording start position of the succeeding block is recorded and held in a predetermined recording means, and as a premise of such processing, the management area is recorded. When an erasing process is performed to determine that the data in the data area has been erased by erasing the data, predetermined identification information is set, and the writing process is started with the identification information, thereby processing a minimally blank or the like. However, even the optical disk according to the above can perform packet writing and the like.

[Brief description of the drawings]

FIG. 1 is a schematic diagram for explaining processing of an optical disk device according to a first embodiment of the present invention;

FIG. 2 is a block diagram showing the optical disk device of FIG.

FIG. 3 is a flowchart illustrating a processing procedure of a central processing unit of the optical disk device of FIG. 2;

FIG. 4 is a flowchart showing a procedure for processing a minimally blank in a central processing unit of an optical disk device according to a second embodiment of the present invention.

FIG. 5 is a flowchart showing a packet write processing procedure of the central processing unit of FIG. 4;

FIG. 6 is a schematic diagram for explaining a packet write process in a conventional optical disc device.

[Explanation of symbols]

1 ... optical disk device, 2 ... host computer, 3
…… Optical disk, 15… Central processing unit

Continued on the front page (72) Inventor Hirokuni Hashimoto 6-7-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation (72) Inventor Tadayuki Mihozu 6-35-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony (72) Inventor Keiko Takase 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo F-term within Sony Corporation (reference) 5D044 BC04 CC04 DE40 EF00 EF05 5D090 AA01 BB04 CC01 CC14 DD02 DD05 EE05 FF34 GG29

Claims (21)

[Claims] In an optical disk apparatus for accessing a rewritable optical disk, in a portion where recorded data exists, user data is recorded in a predetermined block unit while erasing the recorded data by overwriting, The position information of the recording start position of the subsequent block is recorded in a predetermined recording unit, and based on the position information recorded in the recording unit,
An optical disk device, wherein the subsequent block is recorded from the recording start position, and the position information recorded in the recording means is updated. 2. The recording device, wherein the recording device is a recording device different from the optical disk, and the position information is recorded on the recording device together with an identification code for identifying the optical disk, and the identification code acquired from the optical disk is 2. The optical disk device according to claim 1, wherein the position information recorded in the recording unit is acquired, and the subsequent block is recorded from the recording start position. 3. The optical disk device according to claim 1, wherein said recording means is said optical disk. 4. The optical disk device according to claim 3, wherein the position information is a marker recorded at the recording start position on the optical disk. 5. The optical disk apparatus according to claim 4, wherein the marker is formed by physically erasing the recorded data. 6. The optical disk device according to claim 4, wherein the marker is formed by logically erasing the recorded data. 7. The position information is stored in a predetermined memory,
Updating the position information held in the memory in accordance with the recording of the user data on the optical disk, and recording the position information held in the memory on the optical disk when the optical disk is ejected, whereby the position information 4. The optical disk device according to claim 3, wherein recording is performed when the optical disk is ejected. 8. An optical disk apparatus for accessing a rewritable optical disk, wherein an erasure process is performed by erasing data in a management area in which data for management of the data area is recorded by erasing the data in the management area. In this case, predetermined identification information is set, and in the writing process, based on the identification information, in a portion where recorded data exists from the beginning of the data area, the recorded data is overwritten to overwrite the recorded data. While erasing, the desired data is recorded in a predetermined block unit, the position information of the recording start position of the subsequent block is recorded in a predetermined recording means, the setting of the identification information is updated, and the data is recorded in the recording means. Based on the obtained position information, the subsequent block is recorded from the recording start position, and the recorded information is recorded in the recording unit. Optical disc apparatus characterized by updating the location information. 9. The method according to claim 8, wherein the setting of the identification information is a process of recording on the optical disc so that the disc is recorded on the optical disc at least when the optical disc is ejected. Optical disk device. 10. The optical disk device according to claim 9, wherein the updating of the identification information is a deletion of a record of the identification information. 11. The optical disk device according to claim 9, wherein the identification information is recorded outside a lead-out area of the optical disk. 12. The optical disk device according to claim 9, wherein the identification information is recorded in the management area. 13. The optical disk apparatus according to claim 8, wherein the setting of the identification information is processing of recording an identification code for identifying the optical disk on a recording unit different from the optical disk. 14. The recording device, wherein the recording device is a recording device different from the optical disk, the position information is recorded on the recording device together with an identification code for identifying the optical disk, and the identification code obtained from the optical disk is 9. The optical disk device according to claim 8, wherein the position information recorded in the recording unit is acquired, and the subsequent block is recorded from the recording start position. 15. The optical disk device according to claim 8, wherein said recording means is said optical disk. 16. The optical disk apparatus according to claim 15, wherein the position information is a marker recorded at the recording start position on the optical disk. 17. The optical disk device according to claim 16, wherein the marker is formed by physically erasing the recorded data. 18. The optical disk device according to claim 16, wherein the marker is formed by logically erasing the recorded data. 19. The position information held in a predetermined memory, and the position information held in the memory is updated by recording the block on the optical disk. When the optical disk is ejected, the position information held in the memory is updated. 10. The optical disk device according to claim 9, wherein the recording of the position information is performed when the optical disk is ejected by recording the position information on the optical disk. 20. A method of controlling an optical disk apparatus for accessing a rewritable optical disk, wherein, in a portion where recorded data exists, user data is erased in predetermined block units while erasing the recorded data by overwriting. Record, record the position information of the recording start position of the subsequent block in a predetermined recording unit, and record the subsequent block from the recording start position based on the position information recorded in the predetermined recording unit. A method for controlling the optical disk device, further comprising updating the position information recorded in the recording means. 21. A method for controlling an optical disk apparatus for accessing a rewritable optical disk, wherein the erasure of data in the data area is performed by erasing data in a management area in which data for management of the data area is recorded. When the processing is executed, predetermined identification information is set, and in the writing processing, a portion where recorded data exists from the beginning of the data area is overwritten based on the identification information. While erasing the already-recorded data, the desired data is recorded in a predetermined block unit. Based on the position information recorded in the recording means, the subsequent block from the recording start position is recorded, and the recording means Control method of an optical disk apparatus and updates the recorded has been the location information.