JP2001307328A - Data writing system, data writing method and optical disk recording/reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the reduction of the amount of writing data to be stored to the data transfer source in order to cope with occurrence of writing error in the case the write-in of a series of data is not finished for all. SOLUTION: This system is provided with an information recording means 2 for reading out the address to record the data and generating the write-in finish information DEN relating to these data while irradiating a disk-like recording medium 3 with laser beams, and a data processing means 1 for receiving the write-in finish information DEN from this information recording means 2 to calculate the written address in the disk-like recording medium 3 and deciding whether these data are cancelled or not on the basis of the written address. By this constitution, the amount of the writing data to be stored to the data transfer source in order to cope with occurrence of writing error is minimized, in the case the write-in of a series of data is not finished for all.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recordable optical disk (CD-R, DVD-R), a rewritable optical disk (CD-RW), and a writable optical disk such as a mini disk (MD). TECHNICAL FIELD The present invention relates to a data writing system, a data writing method, and an optical disk recording / reproducing apparatus which are preferably applied to the present invention.

More specifically, in a case where data is written on a disk-shaped recording medium on which an address is recorded in advance, a data management means for calculating a write final address on the disk-shaped recording medium before receiving the data write end information is provided. And determining whether or not the data is to be discarded based on the write confirmed address, and in the case where writing of a series of data has not been completed, to cope with the occurrence of an unknown write error. This is to reduce the amount of write data that must be stored and stored.

[0003]

2. Description of the Related Art In recent years, writable optical disks, for example, ISO / IEC13490-, have been used as information media for editing and recording audio information and the like according to listeners' preferences.
Write-once optical discs (CD-R,
DVD-R) or rewritable optical disc (CD
-RW) and minidisc (MD) have been used in many cases. For example, write data such as video information and audio information created on a personal computer is recorded on an optical disk by using a driver such as a recording / reproducing device.

FIG. 13 is a transmission / reception image diagram showing a state transition example in a variable write mode according to a conventional example. Generally, when information is recorded on a disk-shaped recording medium such as a CD-R, interruption of the data writing operation causes a reduction in the speed of the entire writing process. For example, according to a conventional data writing system, data is recorded in the following procedure in a variable length write mode (variable write). The variable writing mode refers to a writing method in which the length of data to be written to a disk at one time is changed.

First, in step P1 shown in FIG. 13, the personal computer issues a write command to a drive and transfers write data to the drive. In the drive, the write data is temporarily stored in the drive buffer, and in step P2, the transfer is notified to the personal computer. After that, the personal computer issues a write command to the drive in step P3, and the process of transferring the write data to the drive is repeated. In step P4, the transfer OK is notified every time data is received. Then, the personal computer issues a flash command to the drive in step P5 to instruct the drive to record the data in the drive buffer on the disk. This causes the driver to write the data in the buffer to the disk. Then, in step P6, the driver notifies the personal computer of the write end information DEN.

In this method, since data writing is completed for each buffer length of the driver, it is possible to easily know how much data has been written to the disk. However, data cannot be transferred from the personal computer to the drive buffer while the drive is writing data to the disk. Therefore, the next data does not exist in the drive buffer when the data writing to the disk is completed. As a result, the operation of writing data to the disk is interrupted.

For the write operation after the interruption, the optical pickup is moved to a data writable position. This requires time for preparing data writing. At best, this interruption is required every time buffer length data is written to the disk. At this time, since the data transfer and the write operation are not performed at the same time, it is necessary to wait until each of the processes ends. Due to these factors, FIG.
In addition, the data transfer time and the write preparation time are added to the write operation time shown in the time chart shown in FIG. 1 to increase the total write time, and as a result, the write speed is reduced as a whole.

In order to improve the interruption of the write operation in the variable write mode, a long variable length write mode shown in FIGS. 15A and 15B has been devised. According to this write mode, the personal computer transfers data to the drive while the drive is writing data to the disk. The drive does not interrupt the write operation as long as data exists in the buffer.

In step Q1 shown in FIG. 15A, the personal computer issues a write command to the drive and transfers write data to the drive buffer. The drive notifies the personal computer of the transfer OK in step Q2. At the same time, when some data is transferred into the buffer, the driver starts writing the data in the buffer to the disk. Then, in step Q3, the personal computer issues a write command to the drive, and the process of transferring the write data to the drive is repeated. In step Q4, the transfer is notified every time data is received. The driver ends the write operation as soon as there is no more data in the buffer.

In this method, the data transfer from the personal computer to the drive and the data write operation to the disk are performed simultaneously, and the drive write operation is not interrupted while the data is being transferred to the buffer. Therefore, FIG.
Only the initial data transfer time and the write preparation time are added to the write operation time shown in the time chart shown in FIG. 5B, so that the total write time is shortened. As a result, the speed of the write operation can be increased as compared with the variable write mode. .
On the other hand, the exchange of commands between the personal computer and the drive is not synchronized with the operation of writing data to the disk, so that the personal computer cannot recognize how much data has been written.

In these conventional systems, variable-length packet data is written to a disk at a high speed. However, a method of writing fixed packet data to a disk at a high speed has been devised. This type of writing method is called a stream write mode regardless of a variable length or fixed length packet.
In the stream write mode, for example, when recording information on a CD-R disc-shaped recording medium, with respect to a write error that has occurred unintentionally, writing is resumed as if there was no write error, and the original disc is written. The data to be written can be written without leaking.

That is, in the stream write mode, the drive repairs a physical defect caused by a write error by an instruction from a personal computer or voluntarily, and makes the disk rewritable. Thereafter, the personal computer reconstructs the data that has not been written to the disk due to the write error as necessary, and rewrites the data to the rewrite address of the disk.

[0013]

According to the stream write mode according to the conventional method, the write end information returned from the driver in response to the write command to the personal computer indicates that the data has been transferred to the drive buffer. Yes, it does not indicate whether the data was actually written on the disk.

Therefore, until the personal computer recognizes that a series of data has been written to the disk, the data or original data sufficient to reconstruct the data is retained in the personal computer in preparation for a write error. I have to put it. For this reason, even if the write end information is received, the data cannot be immediately discarded from inside the personal computer. However, the data storage area inside the personal computer is limited, and write data that does not require data retention should be discarded sequentially so as not to hinder other data processing.

In the conventional method, since the write completion information indicates that the data has been transferred to the drive buffer, it is determined which data of which address can be discarded and which address data is prohibited from being discarded. There is a problem that it is difficult. Incidentally, when a write error occurs, a write error address is notified from the drive to the personal computer as a part of the error information, and it is considered that data written before this address is written on the disk. However, when the write operation is normally performed, such error information is not notified to the drive, and therefore, it is not possible to know whether or not data has already been written to the disk during the normal write operation.

Therefore, the present invention solves such a conventional problem. In the case where writing of a series of data has not been completed, an unknown write error should be dealt with. It is an object of the present invention to provide a data writing system, a data writing method, and an optical disk recording / reproducing apparatus capable of reducing the amount of write data that must be stored and stored.

[0017]

SUMMARY OF THE INVENTION An object of the present invention is to provide a data writing system for writing data on a disk-shaped recording medium in which an address is recorded in advance. An information recording means for reading and recording data, and generating write end information relating to the data; and transferring the data to the information recording means, and in the disc-shaped recording medium before receiving the write end information from the information recording means. And a data management means for calculating a write confirmed address and determining whether to discard the transferred data based on the write confirmed address.

According to the data writing system of the present invention, when data is transferred from the data management means to the information recording means when the data is written on a disk-shaped recording medium on which addresses are recorded in advance, the information recording means In addition, the disk-shaped recording medium is irradiated with a light beam, the address is read and data is recorded, and after this recording, write end information relating to the data is generated.

The data management means calculates a write final address on the disk-shaped recording medium before receiving the write end information, and determines whether to discard the data supplied to the information recording means based on the write final address. Is done.

For example, in the data management means, of the data transferred to the information recording means, discarding of data written to an address preceding the write finalizing address is permitted, and data discarded after the write finalizing address. Therefore, discarding of data from the write fixed address to the maximum value of the address at the time of data transfer is prohibited.

Therefore, even when the writing of a series of data has not been completed, it is possible to execute the discarding process of the data written to the address before the write finalizing address, and to execute the write finalizing. Only data from the address to the maximum value of the address at the time of data transfer can be held. As a result, the amount of write data that must be stored and stored in the data management unit to deal with the occurrence of an unknown write error in the information recording unit can be minimized. In addition, the memory occupation time used for data transfer in the data management means can be reduced.

The data writing method according to the present invention is a method for writing data to a disk-shaped recording medium in which addresses are recorded in advance. In the data writing system, data and addresses are transferred and optical data is written to the disk-shaped recording medium. By irradiating the beam, data is recorded while reading the address of the disk-shaped recording medium, and write end information is generated every time a series of data is written, and the data management system transfers the data and the address to the data writing system. Before receiving the write completion information from the data writing system, a write confirmation address in the disc-shaped recording medium is estimated, and it is determined whether to discard the transferred data based on the write confirmation address. It is assumed that.

According to the data writing method of the present invention,
Even if the writing of a series of data is not completed in the data writing system, the data management system estimates the write final address on the disk-shaped recording medium, so the address before the write final address is estimated. Can perform the process of destroying the data written to
Further, of the transferred data, only the data after the write confirmed address and from the write confirmed address to the maximum value of the address at the time of data transfer can be maintained.

An optical disk recording / reproducing apparatus according to the present invention comprises:
An optical disk recording / reproducing apparatus for writing data to an optical disk in which an address is recorded in advance, wherein the information is read by irradiating the optical disk with a light beam to read the address, record the data, and generate write end information related to the data. Recording means for transferring data to the information recording means, calculating a write final address on the disk-shaped recording medium before receiving write end information from the information recording means, and transferring the transferred data based on the write final address. And control means for determining whether or not to discard the.

According to the optical disk recording / reproducing apparatus according to the present invention, the above-described data writing system is applied to the apparatus. That is, when data is supplied from the control unit to the information recording unit when writing data to the disk-shaped recording medium on which the address is recorded in advance, the information recording unit
The disk-shaped recording medium is irradiated with a light beam, the address is read and data is recorded, and after this recording, write end information relating to the data is generated. Further, the control means calculates a write final address on the disc-shaped recording medium before receiving the write end information, and determines whether to discard the data supplied to the information recording means based on the write final address.

For example, in the control means, of the data transferred to the information recording means, discarding of data written at an address before the write-determined address is permitted, and the data is written after the write-determined address. In addition, discarding of data from the write fixed address to the maximum value of the address at the time of data transfer is prohibited.

Therefore, even when the writing of a series of data has not been completed, it is possible to execute the discarding process of the data written to the address before the write finalizing address, and to execute the write finalizing. Only data from the address to the maximum value of the address at the time of data transfer can be held.

Thus, it is possible to minimize the amount of write data that must be stored and stored in the control means to cope with the occurrence of an unknown write error in the information recording means. Moreover, the occupation time of the memory used for data transfer in the control means can be reduced.

[0029]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a data writing system, a data writing method and an optical disk recording / reproducing apparatus according to the present invention will be described with reference to the drawings.

(1) Data Writing System as Embodiment FIG. 1 is a block diagram showing a configuration example of a data writing system 100 as an embodiment of the present invention.

In this embodiment, data is written on a disk-shaped recording medium on which an address has been recorded in advance, and data management for calculating a write final address on the disk-shaped recording medium before receiving the write end information of the data. Means for judging whether or not to discard the transferred data based on the write confirmed address.
The present invention can reduce the amount of write data that must be stored and stored in the data management means to cope with the occurrence of an unknown write error.

The data writing system 100 shown in FIG.
Is for writing data WD to the disk-shaped recording medium 3 in which addresses are recorded in advance. A writable optical disc, for example, ISO / IEC1 is written on the disc-shaped recording medium 3.
A write-once optical disc (CD-R, DVD-R), a rewritable optical disc (CD-RW), or a mini disc (MD) standardized by 3490-1 is used.

In the data writing system 100, a data management means 1 such as a personal computer is prepared, and video information and audio information to be recorded on the disk-shaped recording medium 3 are prepared in advance. An information recording means 2 such as an optical disk driver is connected to the data management means 1, and write data WD such as video information and audio information is transferred from the data management means 1 to the information recording means 2.

The information recording means 2 irradiates a light beam L to a disc-shaped recording medium 3 such as a write-once optical disc (CD-R, DVD-R) and reads the address to record the write data WD. Is done. In this example, the write data WD is stored in the disk-shaped recording medium 3 in ascending address order.
Is written to. When the writing of the data WD is completed, the information recording means 2 generates write end information DEN.

The write end information DEN is stored in the information recording means 2
Is returned to the data management means 1. Data management means 1
Then, the write final address on the disk-shaped recording medium 3 before receiving the write end information DEN from the information recording means 2 is calculated, and the write data WD transferred to the information recording means 2 is discarded based on the write final address. It is determined whether or not. Then, in the data management unit 1, among the data WD transferred to the information recording unit 2, the discard of the data WD written to the address before the write confirmed address is permitted, and the data WD after the write confirmed address is permitted. Therefore, discarding of the data WD from the write fixed address to the maximum value of the address at the time of data transfer is prohibited.

For example, in the case where the information recording means 2 is provided with a storage means 21 for writing data, the data management means 1 sets at least the write fixed address on the disk-shaped recording medium 3 to Ax, The maximum address value of the write data WD to be transferred is set to Amax (Last
Address), the buffer capacity of the storage means 21 is Dbuff (Drive Buffer Size), the sector size of the disk-shaped storage medium is Ssec (Sector Size),
When the undetermined address due to the write margin in the information recording means 2 is α (Alpher), the equation (1) is calculated. Ax = Amax- (Dbuff / Ssec + α) (1)

Note that the write margin is the information recording means 2
Means a delay compensation element due to a data holding operation or the like. This arithmetic expression (1) is used in the determination method # 1 in the following embodiment. Alternatively, the same storage means 21 is provided in the information recording means 2, and the data management means 1 similarly sets the write fixed address to Ax,
Amax is the address maximum value of the write data WD to be transferred to the storage means 21, Dsiz (Data Size in Buffer) is the data amount existing in the storage means 21, Ssc is the sector size of the disk-shaped storage medium, and When the undetermined address due to the margin is α,
Equation (2) is calculated. Ax = Amax- (Dsiz / Ssc + α) (2)

This equation (2) is used in the determination method # 2 in the following embodiment. In the case where the data management means 1 is provided with the storage means 11 for data management and the information recording means 2 is provided with the storage means 21 for writing data, the memory capacity of the latter storage means 21 is smaller than that of the former. If the memory capacity can be ignored compared to the memory capacity of the storage means 11, the data management means 1 similarly sets the write-determined address to Ax, sets the maximum address value of the write data WD to Amax, and sets the address undetermined by holding the write data. When the minute is α, equation (3) is calculated. Ax = Amax-α (3)

This equation (3) is used in the determination method # 3 in the following embodiment. In this example, the write confirmed address Ax is calculated, and the data management unit 1 sets “1” or “0” as the discard permission information for the data WD written to the address before the write confirmed address Ax. Is added.

For example, FLAG = 1 indicates discard permission and is equivalent to a state in which a discard permission mark is attached.
G = 0 indicates discard prohibition, and is assumed to be equivalent to a state where the discard permission mark is removed. The data management means 1 discards the write data WD added with the discardable flag from the data management storage means 11 at any time.

Further, when a write error occurs in the information recording means 2, the data management means 1 controls the information recording means 2 to repair the disk-shaped recording medium 3. At the same time, the address and the recording data are read from the disk-shaped recording medium 3 in the ascending direction starting from the write fixed address Ax.
The maximum value of the address where the data WD is actually written is detected. This is because the data WD after the occurrence of the write error is replaced with a new writable address based on the maximum value of the address.

Alternatively, when a write error occurs in the information recording means 2, the data management means 1 obtains an error occurrence address from the information recording means 2, and
Is controlled so that the disk-shaped recording medium 3 is repaired. At the same time, the address and recording data are read from the disk-shaped recording medium 3 in the descending direction starting from the error occurrence address, and the maximum value of the address at which the data WD is actually written on the disk-shaped recording medium 3 is determined. Detection. This is because the data WD after the occurrence of the write error is rewritten to a new writable address.

Subsequently, a data writing method according to the present embodiment will be described. FIG. 2 is a flowchart illustrating a processing example according to the data writing method according to the embodiment.

In this example, when a data management system and a data writing system are connected by a communication line and data is written on the disk-shaped recording medium 3 on which an address is recorded in advance, the data management system writes the write end information of the data WD. Before receiving DEN, it is assumed that the write confirmed address Ax in the disk-shaped recording medium 3 is estimated, and whether to discard the transferred data WD based on the write confirmed address Ax is assumed. Regarding data transfer, a stream write mode in which data writing is continued without interruption is taken as an example. It is assumed that data is written to the disk-shaped recording medium 3 in block units.

Based on this, in accordance with a data write request to the disk-shaped recording medium 3 (not shown), the data WD to be written to the write-scheduled address is transmitted from the data management means 1 in step A1 of the data management system flowchart of FIG. It is transferred to the recording means 2. At this time, a series of write data WD is transferred from the storage unit 11 of the data management unit 1 to the information recording unit 2, for example, in sector units.
In the data writing system receiving this, the write data WD is stored in the storage means 21 in step A5. afterwards,
In step A6, the information recording means 2 irradiates the disk-shaped recording medium 3 with the light beam L, reads the address, and writes the write data WD in block units, for example.
Is recorded. The write data WD is written to the disk-shaped recording medium 3 in ascending address order.

The data WD on the disk-shaped recording medium 3
In the data management system, the write end information D
Before receiving the EN, the write fixed address Ax in the disk-shaped recording medium 3 is estimated in step A2. At this time, in the data management means 1, the write fixed address Ax on the disk-shaped recording medium 3 is set as described in (1) to (3)
Is calculated based on one of the calculation formulas.

Thereafter, the process proceeds to step A3, where the data management means 1 determines whether to discard or maintain the write data WD transferred to the information recording means 2 based on the write fixed address Ax. In the data management unit 1, the data WD transferred to the information recording unit 2 is permitted to discard the data WD written to the address before the write confirmed address Ax, and after the write confirmed address Ax, And the write fixed address A
Data W from x to the maximum value of the address at the time of data transfer
D is forbidden to be destroyed. Here, FLAG = 1 is added to data indicating discard permission, and FLAG = 0 is added to data indicating discard prohibition. Then, the data management unit 1 discards the write data WD to which FLAG = 1 is added from the data management storage unit 11 as needed.

During this time, the information recording means 2 continues to record a series of data WD. When the writing of the data WD of one block is completed, the information recording means 2 generates write end information DEN for each block in step A7, and returns this to the data management means 1. In response to this reply operation, the data management means 1 writes the write end information DEN in step A4.
Is received. Thereafter, similarly to the conventional method, the process shifts to step A8 to execute processing for an error and other processing.

When these processes are completed, it is determined in step A9 whether or not the data recording for the address to be written has been completed. If the entire series of data WD recording has not been completed, the flow returns to step A1 to transfer the write data WD from the data management system to the data writing system, and the data recording system receives this in step A5 and performs the data writing operation. Is continued. When the recording of the series of data WD has been completed, the data writing process ends.

As described above, according to the data writing system 100 according to the present embodiment, even if the writing of a series of data WD is not completed, the data is written to the address before the write fixed address Ax. It is possible to execute the discarding process of the data WD obtained, and to retain only the data WD from the write confirmed address Ax to the maximum value of the address at the time of data transfer. As a result, the amount of write data WD that must be stored and stored in the storage unit 211 of the data management unit 1 to cope with the occurrence of an unknown write error in the information recording unit 2 can be minimized. In addition, the memory occupation time used for data transfer in the data management means 1 can be reduced.

(2) Embodiment FIG. 3 is a block diagram showing a configuration example of a data writing system 200 as an embodiment according to the present invention. FIG. 4 is a format showing an example of a frame structure of a signal recorded on an optical disc.

In this example, a data sequence having a file structure is written on an optical disk 31 on which an address is recorded in advance, and a personal computer which calculates a write final address on the optical disk 31 before receiving the write end information of the data sequence (Hereinafter simply referred to as PC)
It is determined whether or not the data string is to be discarded based on the write confirmed address, and when the writing of a series of data is not completely completed, an unknown write error should be dealt with. It is intended to reduce the amount of write data that must be stored in a personal computer. Of course, the data to be written on the optical disc 31 is not limited to the file structure, but can be applied to any data.

The personal computer 10 shown in FIG. 3 is an example of the data management means 1, and includes a communication cable 4 such as RS-232C.
Is connected to an optical disk driver 20 which is an example of the information recording means 2 via the interface. The personal computer 10 is the memory unit 1
2, a monitor 13, a keyboard 14, and a control device 15. The memory unit 12 is a storage unit 11 for data management.
File structure buffer (File Data Str
ucture Buffer) 24, data conversion table (Convert
Table 25 and a disk image buffer (Disc)
Image Buffer) 26.

In the file structure buffer 24, data Di (i) having a file structure to be written on the optical disc 31
= 1 to n) and its attribute directory structure are managed.
The data conversion table 25 is stored in the file structure buffer 24.
Is connected as a software program, and the file structure data Di to be written on the optical disk 31 is
1 data format image.

Header data and history information are added to the converted data. A set of data to which the header information and history information have been added is referred to as a data string (stream data).
That. A disk image buffer 26 is connected to the data conversion table 25 in the same manner, and the data sequence after data conversion is arranged at a write address corresponding to the data format on the optical disk 31.

A control unit 15 is connected to the memory unit 12, and while displaying a directory or the like on the monitor 13 or the like based on operation information input from the keyboard 14, a data string relating to video information and audio information is stored in the optical disk driver. At the same time, these data strings are written to the optical disc 31 after being subjected to a predetermined modulation process. In this example, in the file structure buffer 24,
The newly created file structure data Di does not initially have a discardable flag added thereto, but a discardable flag is added to the write data WD written on the optical disk 31. In addition, the FLAG is determined based on the write confirmation address Ax. = 1 or FLAG = 0.

That is, the file structure data Di to be written to the optical disk 31 from now on does not have a discardable flag. For example, when new video information, audio information, and the like are created, the discardable flag and the flag content are not attached to the contents of the actual file or the file structure data Di indicating the attribute of the file. This discardable flag is added by writing the data WD to the optical disc 31. Therefore, the data read from the optical disk 31 already has a discardable flag added thereto, and the content thereof is FLAG indicating that data discarding is permitted.
= 1 is added. This is because once the data is written on the optical disc 31, even if the read data is discarded, the data is still recorded on the optical disc 31.

In response to a write request caused by a buffer capacity shortage or various events such as a user operation, the control device 15 sequentially outputs the file structure data Di among the file structure data Di without the discardable flag. Di is converted into a disk image, and FLAG = 0 indicating discard prohibition is described. At this time, the address information at which the data WD is to be actually written is reflected in the disk image according to the disk format standard. For example, it is determined at which data recording position (recording track) on the optical disk 31 the contents of the substantial file such as video information and audio information are to be written, and a disk image is created. This disk image is the write data WD as a data string.

At this time, the relationship between each write address portion of the disk image buffer 26 and the file structure data Di that constitutes it is stored in the data conversion table 25, for example, and the converted write data WD is It is stored in the disk image buffer 26. In this example, the write data WD transferred to the optical disk driver 20 is transmitted to the control device 1 of the personal computer 10 before receiving the write end information DEN from the optical disk driver 20.
5, the write confirmation address Ax on the optical disk 31 is calculated, and the file structure data Di with the flag FLAG = 1 indicating discard permission is sequentially deleted from the file structure buffer 24 based on the write confirmation address Ax.

An optical disk driver 20 is connected to the personal computer 10 via a communication cable 4. The optical disk driver 20 has a drive buffer 27, an encoder 28, a laser driver 29, and a control device 45. The communication cable 4 is connected to the control device 15 of the personal computer 10.
And the control device 45 of the driver 20.

In the optical disk driver 20, the personal computer 1
From 0, write control command information (hereinafter referred to as a write command) issued to the control device 45 via the control device 15 is received. After issuing the write command, the personal computer 10 sequentially transfers the write data WD as a data string to the optical disk driver 20. The write data WD is stored in a drive buffer 27 as an example of the storage unit 21 for writing.
Is stored temporarily. In the control device 45, the write data W
As soon as D accumulates to some extent, preparation for writing to the optical disk 31 is started. Here, the writing preparation means the optical disc 3
1 to seek the optical pickup slightly before the writable position (recording track) on
8 or setting the laser driver 29 or the like to the data writing mode.

When the optical disk driver 20 is ready for writing, the control device 45 starts transferring the write data WD from the drive buffer 27 to the encoder 28 at an appropriate timing. In the encoder 28, the write data WD
Is converted into a data format according to the physical standard of the optical disc 31. For example, according to the compact disc standard, CIRC is
(Cross Interleave Reed-solomon Code) is encoded (error correction code processing).
EFM (Eight to F)
Our teen modulation is recorded on the optical disc 31 by modulation.

In the CIRC encoding process, 8 bits are set to 1
It is processed as a symbol, and the CIR
Eight-bit data per symbol or parity signal obtained by the C encoding process is used
It is converted to a bit signal. A 24-bit frame synchronization signal and a 1-symbol (14-bit) subcode signal as shown in FIG. 4 are added to the 32-symbol (32 × 14 bits) data and parity signal that have been subjected to the EFM conversion processing. At the same time, a signal of one frame (588 channel bits) is formed by adding a 3-bit signal for combining symbols and combining a symbol and a frame synchronization signal.

The write data WD after data conversion is modulated by the laser driver 29, and the modulated laser light L
Is irradiated onto the write-scheduled address of the optical disk 31, so that the data WD is sequentially written on the optical disk 31. Writing is performed continuously in ascending order of address.

When the writing of the data WD is completed, the optical disk driver 20 generates write end information DEN. The write end information DEN is returned from the optical disk driver 20 to the personal computer 10.
Before receiving the write end information DEN from the optical disk driver 20, the personal computer 10
Is calculated using any one of the above-described arithmetic expressions (1) to (3), and the optical disk driver 20 is operated based on the write determined address Ax.
It is determined whether or not the write data WD transferred to is discarded.

The address on the optical disk 31 is directly obtained by this determination method. This address is the most newly written address among the sectors on which the write data WD has already been written on the optical disk 31. Or, it is an address close to it. For example, CD-R
Data writing to the disk is performed sequentially in ascending address order. For this reason, it is considered that the write-determined address Ax obtained by the determination method according to the present invention and the data to be written to a writable address smaller than that are actually written to the optical disk 31.

[Judgment method # 1] In this example, the arithmetic expression (1)
The write-determined address Ax obtained as described above and the data to be written to an address smaller than that are considered to be determined on the disk. Equation (1)
The buffer capacity of the drive buffer 27 is applied to Dbuff. Here, the buffer capacity Dbuff is a fixed value unique to the driver, and can be recognized on the personal computer 10 side by issuing a read buffer capacity (Reed Buffer Capacity) command from the personal computer 10 to the optical disk driver 20 at the time of drive recognition or the like. it can.

The sector size of the optical disk 31 is applied to Ssec. The undetermined address α is the encoder 2
8. Compensates for uncertainty due to the write data holding operation in the laser driver 29, and about 2000 to 3000 is applied depending on the performance of the optical disk driver 20.

[Judgment Method # 2] In this example, the write-determined address Ax obtained by the above-described arithmetic expression (2)
Data that was to be written to a younger address is considered as fixed on the disk. The data buffer size existing in the drive buffer 27 is applied to the data amount Dsiz in the arithmetic expression (2). The data buffer size is a value that changes every moment in accordance with the data write process. By issuing a buffer capacity read command to the optical disk driver 20 between write commands, the personal computer 10 sequentially receives reply information from the optical disk driver 20. You can know on the side. Actually, since the writing operation continues, an accurate value is not always obtained. For the undetermined address α, the same value as in the determination method # 1 is applied.

In this determination method # 2, the personal computer 10 is controlled in accordance with the data amount Dsiz existing in the drive buffer 27.
Determines the amount of data that must be stored in Therefore, by adjusting the data to be transferred to the drive buffer 27 on the personal computer 10 side, the data amount Dsiz existing in the drive buffer 27 is adjusted. Thus, when the storage area of the disk image buffer 26 in the personal computer 10 is not sufficient, the data is transferred so as to reduce the data amount Dsiz existing in the drive buffer 27. Conversely, if the recording area of the disk image buffer 26 has room, the data is transferred so that the data amount Dsiz existing in the drive buffer 27 increases.

[Judgment Method # 3] In this example, the write-determined address Ax obtained by the above-described arithmetic expression (3)
Data that was to be written to a younger address is considered as fixed on the disk. The same value as in the determination method # 1 or the determination method # 2 is applied to the undetermined address α in the arithmetic expression (3).

According to these determination methods # 1 to # 3, the determination is made during the execution of the write operation and the write data W
D is used including a write margin (which is included in α) for compensating that D has been reliably written on the optical disk 31. Therefore, when an error occurs, each of the determination methods # 1, # 2 or There is a possibility that data to be written to a writable address larger than the write confirmed address Ax obtained in # 3 has already been written on the optical disk 31. Therefore, an accurate written address can be obtained by the following recovery method.

FIG. 5 is an image diagram of a data string showing an example of detecting the maximum value of a written address when a write error occurs. Generally, write errors are caused by vibration of the data write system,
It occurs unintentionally due to a scratch on the optical disk 31 or the like. The write error shown in FIG. 5 is a case where a write error has occurred between the write fixed address and the write scheduled address. For example, in a data sequence transferred from the personal computer 10 to the optical disk driver 20 in units of a sector, when data is written from the drive buffer 27 to the optical disk 31 in units of blocks, a write error occurs in the second block of the sector. An example where this occurs will be described.

[Recovery method * 1] In this method, when a write error occurs, record data is read out in ascending address order from the write fixed address Ax on the optical disk 31 obtained by the above-described determination method # 1, # 2 or # 3. Then, the maximum value of the address actually written on the optical disk 31 is obtained. This value becomes the maximum value of the written address. Regarding the data restoration at this time, for example, when a writable address exists in the fifth block that jumps over the two dummy blocks, the data to be written in the second block is written in the fifth block.

[Recovery Method * 2] In this method, when a write error occurs, the recorded data is sequentially read from the error occurrence address communicated from the optical disk driver 20 to the personal computer 10 in the address descending order, and can be actually written on the disk. The maximum value of the address is obtained. This value becomes the maximum value of the written address. The data restoration at this time is as described above.

In the personal computer 10, of the write data WD transferred to the optical disk driver 20, the discard of the data WD written to the planned write address before the write final address Ax is permitted, and the write final address Discarding of the data WD after Ax and reaching the maximum value of the scheduled write address at the time of data transfer from the write fixed address Ax is prohibited. In the personal computer 10, the write data W to which FLAG = 1 is added
D is discarded from the disk image buffer 26 at any time.

[Error Recovery Procedure] When a write error occurs due to vibration, scratches on the disk, or the like, the optical disk driver 20 detects this and detects “write error” as response information of a write command transferred from the personal computer 10 to “ "Write error" is returned. The personal computer 10 obtains a rewritable address by, for example, issuing a track acquisition command to the optical disk driver 20. The file structure data Di to which the discardable flag is not added is sequentially converted into disk image data while reflecting the re-writable address as the planned write address.

Next, an operation example of the data writing system 200 as an embodiment according to the present invention will be described. 6 and 7 show examples of data processing by the personal computer 10 (parts 1 and 2).
It is a flowchart which shows. FIG. 8 is an image diagram showing an example of the contents of the file structure buffer 24.

In this example, a stream write mode for writing the write data WD of the data string to the optical disk 31 is executed. When a write instruction by a user is received, the instruction is set in a register or the like, and the personal computer 10
, A write command, a track acquisition command, a buffer capacity read command, and a flash command are issued to the optical disk driver 20, and data is written to the optical disk 31 based on these commands.
The determination method # 1 is applied to the write confirmed address Ax.
And recovery method * 1 for write errors.

On the basis of these, a track acquisition command is issued from the personal computer 10 to the optical disk driver 20 at step C1 in the flowchart of FIG. afterwards,
In step C2, a writable address is set as the planned write address, and (writeable address) -1 is set as the write confirmed address Ax.

Then, in step C3, it is determined whether or not there is a write request from the user. At this time, the write request is determined by confirming the write instruction set in the predetermined register. If there is no write request, the process proceeds to step C14, and the personal computer 10 waits for data transfer to the drive buffer 27. If there is a write request in step C3, the process proceeds to step C4 to detect whether or not there is newly created file structure data Di to which no discardable flag is added.
If the file structure data Di does not exist, there is no need to write data to the optical disc 31, and the process shifts to step C14 to wait for data transfer.

If the new file structure data Di exists in the file structure buffer 24 in step C4, the process proceeds to step C5, where it is detected whether or not a free area exists in the disk image buffer 26. If there is a free area in the disk image buffer 26, the process proceeds to step C6, where a discardable flag is added, and FLAG = 0 indicating discard prohibition is described.
After that, the process proceeds to step C7, where the planned write address is updated.

When there is no free space in the disk image buffer 26 in step C5, and after the scheduled write address is updated in step C7,
Then, it is determined whether or not data transfer from the disk image buffer 26 to the optical disk driver 20 is possible. If data transfer is not possible, for example, the write end information DEN is sent from the optical disc driver 20 to the personal computer 10 side.
Is returned, the flow returns to step C3 to detect again whether there is a write request.

Therefore, if data transfer from the disk image buffer 26 to the drive buffer 27 is possible in step C8, the process proceeds to step C9, where the write data WD is transferred from the disk image buffer 26 to the drive buffer 27. Thereafter, the personal computer 10 proceeds to step C10 to detect whether or not a write error has occurred in the optical disk driver 20. At this time, by receiving a “write error” from the optical disk driver 20, it is detected whether or not a write error has occurred.

If a write error has not occurred, the process proceeds to step C11, where the write fixed address Ax is calculated, and the writable address is updated. In this example, since the determination method # 1 is applied, when a buffer capacity read command is issued from the personal computer 10 to the optical disk driver 20, the size of the drive buffer 27 (buffer capacity Dbuff) is recognized, and a preset optical disk 31 based on the sector size Ssec determined by the physical standard of No. 31 and the undetermined address α which is a fixed value of the optical disc driver 20 including a margin, and the maximum value Amax of the scheduled write address of the data finally transferred by the write command. Using the calculated equation (1), a write finalized address (estimated value) Ax which is the latest value of the address whose data has been finalized on the optical disc 31 is computed.

The write fixed address Ax is obtained each time a write command is issued to the optical disk driver 20 and data writing is normally completed. And personal computer 1
On the 0 side, the data conversion table 25 is referred to, and the data (disk image) relating to the determined write address Ax obtained in this way and the written address that was to be written to a smaller (younger) address than that is constructed. The discardable flag FLAG = 1 is described in the file structure data Di used for this.

For example, in the example of the contents of the file structure buffer 24 shown in FIG. 8, the written address = (written confirmed address) based on the written confirmed address Ax.
When -1 is set, FLAG = 1 is described in the file structure data D1 to Dx-1 related to the written addresses A1 to Ax-1. Amax = Ax + j shown in FIG. 8 is the maximum value of the write scheduled address of the last transferred data, and the file structure data at that time is Dmax. at this point,
Image data that is prohibited from being discarded on the personal computer 10, ie, file structure data W in which FLAG = 0 is described.
D is file structure data (transferred data) DX to DX + j recorded at the planned write addresses Ax to Ax + j corresponding to Dbuff / Sse + α.

The relationship that the discardable flag has been added to the file structure data Di is also deleted from the data conversion table 25. In this example, the file structure data Di with the discardable flag may be discarded immediately and the buffer area may be reused for other processing. However, the data discarding is delayed until the available buffer capacity becomes insufficient. Is also good.

If a write error occurs in step C10, a writable address is calculated. In this example, since the recovery method * 1 is applied, a writable address is determined as a rewrite scheduled address after an error occurs, and data is written from the optical disk 31 in ascending address order from the write determined address Ax determined by the determination method 1. Is read. Then, a disk image is obtained by obtaining the file structure data Di corresponding to the planned write address after data reading based on the data conversion table 25, and this disk image is compared with the recorded data after data reading.

This comparison can be omitted. In that case, the conversion process of the disk image becomes unnecessary. If the corresponding disk image has been written on the disk, a discardable flag is added to the file structure data Di used for constructing the disk image, and the same processing is executed for the next write scheduled address. Is done. If data reading fails,
If a difference in data is found by comparison with the corresponding disk image, the process shifts to disk image conversion processing using the address to be written as an error occurrence address. As an error occurrence address, a writable address is set in a spare sector or the like, and data is written there. Accordingly, the process proceeds to step C12, where the calculated writable address is set as the write scheduled address,
Thereafter, the process returns to step C3.

Then, returning to step C3, it is determined whether or not there is a write request. The above-mentioned data management operation is performed until the write request is satisfied, or the file structure data Di to which the discardable flag is not added disappears. Is repeated until. Whether the optical disk driver 20 has recorded data on the optical disk 31 is determined by issuing a flash command from the personal computer 10 to the optical disk driver 20 and receiving the write end information DEN notified from the optical disk driver 20 to the personal computer 10. A method is adopted.

Next, an example of data writing processing in the optical disk driver 20 will be described. 9 and 10
9 is a flowchart showing an example of data writing processing (tasks 1 and 2) in the optical disk driver 20. In this example, a task 1 for performing a writing process according to a control command from the personal computer 10 and a task 2 for controlling the optical disk driver itself are performed in parallel.

For example, in the optical disk driver 20, FIG.
In step E1 of the flowchart (task 1) shown in (1), it is detected whether a write command from the personal computer 10 has been received. In this example, when the write command is received, the process proceeds to step E2, and it is determined whether or not the writing is completed due to the occurrence of the error. If the writing has not been completed due to the occurrence of an error, the process proceeds to step E3, where the data is stored in the drive buffer 27, and the process returns to step E1. If the writing is completed due to the occurrence of an error in step E2, the process proceeds to step E4, where the optical disk driver 20 notifies the personal computer 10 of a "write error", and thereafter returns to step E1.

Further, in step E1, the personal computer 10
If the message from is not a write command,
The process proceeds to step E5, where it is determined whether the command is a track acquisition command. If the message from the personal computer 10 is a track acquisition command, the process proceeds to step E6 to notify the personal computer 10 of a writable position (recording track position) and the like, and then returns to step E1.

Further, in step E5, the personal computer 10
If the message is not a track acquisition command, the process moves to step E7 to determine whether or not the command is a buffer capacity read command. If the message is a buffer capacity read command, the process moves to step E8, where the optical disk driver 20 notifies the personal computer 10 of the size and free space of the drive buffer 27.

Further, in step E7, the personal computer 10
If the received message is not a buffer capacity read command, the process shifts to step E9 to determine whether or not the command is a flash command. If the message is a flash command, the process proceeds to step E10, where the optical disk driver 20 executes a data write process, and during that time, initializes "during write operation". When data writing is completed or data writing process is not performed,
The process moves to step E11 to determine whether a write error has occurred. If a write error has occurred here, the process proceeds to step E12 and the optical disk driver 20
Notifies the personal computer 10 of a "write error". Then, the process returns to step E1. When the writing is normally completed without generating a writing error, the process proceeds to step E13, where "write end information" is notified from the drive buffer 27 to the personal computer 10, and the process returns to step E1 to repeat the above-described processing.

In parallel with this task 1, the optical disk driver 20 executes the flowchart shown in FIG. 10 (task 2).
It is determined in step F1 whether or not a write operation is being performed. If the writing is not in operation, the process proceeds to step F5. If the writing is not in operation, the process proceeds to step F2. In step F2, it is determined whether a sufficient amount of write data WD exists in the drive buffer 27. If there is sufficient write data WD in the drive buffer 27, the flow shifts to step F3 to prepare for a write operation. If a sufficient amount of write data WD does not exist in the drive buffer 27 in Step F2, Step F
Return to 1.

If there is a sufficient amount of write data WD in the drive buffer 27 in step F2, the flow shifts to step F3 to prepare for the write operation, and then shifts to step F4 to start the write operation. Is done.
At this time, by irradiating the optical disk 31 with the laser beam L, data is written in block units. Then, since it is determined that the writing operation is being performed in step F1, the process proceeds to step F5, and it is determined whether or not all the data in the drive buffer 27 has been written to the optical disk 31. If all the data in the drive buffer 27 has been written to the optical disk 31, step F
Then, the process proceeds to step S6, where the write completion information DEN is notified from the optical disk driver 20 to the personal computer 10, and the data write operation is completed. Thereafter, the process returns to step F1.

Note that even after the writing operation is started,
If data remains in the drive buffer 27 in step F5, the flow shifts to step F7 to determine whether a write error has occurred. If it is not a write error, the process returns to step F1. If a write error has occurred, the process proceeds to step F8, where the disk is re-writable, and step F8 is executed.
Return to 1. The data writing process ends when all the data has been written. By introducing such a discardable flag by the data writing system 200, a file already recorded on the optical disc 31 can be efficiently updated.

[Example of Updating File Data] FIG. 11 is a flowchart showing an example of updating file data in the data writing system 200.

In this example, it is assumed that the file data is updated in the file structure buffer 24. The data (read data) already written on the optical disk 31 is converted to the file structure data Di.
, A discardable flag FLAG = 1 is added. That is, the flag FLAG = 0 indicating discard prohibition is described in the file structure data Di that needs to be written to the optical disc 31 from now on (equivalent to a state in which a discard permission mark is attached). For example, a flag FLAG = 0 indicating discard prohibition is described in newly created file structure data Di (consisting of the contents of the file, header information indicating the attribute of the file, and the like). Since the data read from the optical disc 31 has data remaining on the optical disc 31, the discard flag FLAG =
1 is described (equivalent to a state where the discard permission mark is removed).

Based on this, when updating the data content of a file already recorded on the optical disk 31, first, in step G1 of the flowchart shown in FIG.
The personal computer 10 checks whether or not the file structure data Di corresponding to the part to be updated exists in the file structure buffer 24 with respect to the newly created file. If the file structure data Di related to the update does not exist in the file structure buffer 24, step G
In step 2, the data of the update target portion or the data of the entire file is read from the optical disk 31 and inversely converted to the format of the file structure data Di. At this time, the file structure data Di that has been inversely converted has a discardable flag FL.
AG = 1 is described.

Therefore, in step G1, the file structure data Di of the portion to be updated is already stored in the file structure buffer 24.
And the discardable flag F in step G2.
If the file structure data Di of the update target portion describing LAG = 1 has been transferred to the file structure buffer 24, the process proceeds to step G3, where the file structure data Di of the update target portion is updated with the newly created file. I do.

At this time, a flag FLAG = 0 indicating discard prohibition is described in the updated file structure data Di + 1 (equivalent to a state where the discard permission mark is removed). Thus, the updated file structure data Di + 1 can overwrite the optical disc 31. Until the overwriting is completed, the flag FLAG = 0 indicating discard prohibition operates,
Data can be prevented from being discarded by mistake.

As described above, according to the data writing system 200 according to the embodiment of the present invention, when writing a series of data in the stream write mode on the optical disk 31 on which an address is recorded in advance, the write end information Since the write confirmation address Ax on the optical disk 31 before receiving the data is calculated, the personal computer 10 predicts whether the data WD has been written to the optical disk 31 while the optical disk driver 20 is executing the data write operation ( Estimated).

Further, it is determined whether the write data transferred from the personal computer 10 to the optical disk driver 20 is to be discarded based on the write fixed address Ax. Therefore, even if the writing of a series of data has not been completed, it is possible to execute the discarding process of the data written to the address before the write confirmed address Ax.

As a result, it is possible to hold only the data from the write fixed address Ax to the maximum value of the planned write address at the time of data transfer. Therefore, it is possible to minimize the amount of write data WD that must be stored and stored in the personal computer 10 in order to cope with the occurrence of an unknown write error in the optical disk driver 20. Moreover, the memory occupation time used for data transfer in the personal computer 10 can be reduced.

Further, in this embodiment, when a write error occurs, a more accurate written address can be determined, so that data can be surely recovered from a write error generated during execution of the stream write mode.
Moreover, it is possible to avoid duplicating recording of data already written on the optical disk 31 using the recovery method * 1 or * 2. By doing so, data to be repeatedly written on the optical disk 31 can be reduced, and the disk capacity can be used more effectively. When a write error occurs during execution of the mode, only the data necessary and sufficient for data recovery
It is enough to keep it inside (image buffer etc.).

In this example, the case where the determination method # 1 is employed for the write confirmed address Ax has been described. However, the present invention is not limited to this. Of course, the determination methods # 2 and # 3 are used.
May be. Also, in this example, a case has been described in which data is discarded immediately after the disk image is transferred to the drive buffer 27, but the frequency of occurrence of errors is extremely low by holding the discardable file structure data to some extent. However, when a rewrite error occurs in the recording area before the address is determined, the file structure data can be reused as write data for restoration as it is.

Further, even if the planned write address in the file structure buffer 24 becomes a non-writable address after an error occurs, a list of track recording positions and the like reflected by data restoration can be prepared and stored in advance. It is also possible to correct the disk image in consideration of the offset change of the planned writing position.

In this example, one memory unit is described as being divided into three. However, the present invention is not limited to this. Each memory unit such as the file structure buffer 24, the data conversion table 25, and the disk image buffer 26 is used. These memory units may be provided so that data management is performed by the control device 15 in the personal computer 10.

Although the present invention has been described with respect to a disk-shaped recording medium in the case of a CD-R, the present invention is not limited to this. Other write-once devices, for example, write data in ascending address order, It can also be applied to devices that do not have an address translation function.

The present invention can be applied to a case where a non-writable disk-shaped recording medium is used like a write-once type for reasons such as speeding up. For example, the present invention can be applied to writing in a fixed packet stream mode in a CD-RW.

The data writing system 20 described above
0 has been described between the personal computer 10 and the optical disk driver 20. However, the present invention is not limited to this, and may be executed on the optical disk driver 20 side. In this case, the write confirmation address Ax is calculated by the optical disk driver 20, and the writing of data to the optical disk 31 is notified as reply information in response to an arbitrary command from the personal computer 10.

(3) Optical Disk Recording / Reproducing Apparatus FIG. 12 is a block diagram showing a configuration example of an optical disk recording / reproducing apparatus 300 as an embodiment according to the present invention. In this embodiment, the write confirmation address Ax is calculated on the optical disc recording / reproducing apparatus 300 side, and the discardable flag of the data related to the written address is managed.

The optical disk recording / reproducing apparatus 30 shown in FIG.
Reference numeral 0 denotes a device for writing data to the optical disk 31 on which an address is recorded in advance, and includes an information recording / reproducing unit 60 and a data management unit 70. The information recording / reproducing unit 60 is an example of an information recording unit. The information recording / reproducing unit 60 irradiates the optical disk 31 with a light beam L, reads the address, records data, and generates write end information DEN related to the data. . In addition, the optical disk 31 is irradiated with a light beam, the reflected light L ′ is read, data is reproduced, and read information relating to the data is output.

The information recording / reproducing section 60 includes, for example, a spindle motor 22, a spindle motor driving section 23, an optical pickup 30, an RF amplifier section 32, a clock generation / servo control section 33, an ATIP decoder 34, a driver 35, a thread section 36, and a writing section. It has a compensator 37 and a RAM 41. A data management unit 70 is connected to the information recording / reproducing unit 60, and the information recording / reproducing unit 60 is provided with the write data WD.
At the same time, and calculates the write fixed address Ax on the optical disk 31 based on the write end information DEN,
It is determined whether or not the data is to be discarded based on the write confirmed address Ax. The data management unit 70 includes, for example, a data processing unit 40, a RAM 42, an interface 43, a control unit 50, and a ROM 51.

An optical disk 31 shown in FIG. 12 is a disk-shaped recording medium such as a CD-R, and is rotated at a predetermined speed by a spindle motor unit 22. The spindle motor unit 22 includes a spindle motor driving unit 2 described later.
The optical disk 31 is driven by the spindle drive signal SSD from 3 so that the rotation speed of the optical disk 31 becomes a predetermined speed.

The optical disk 31 is irradiated with a laser beam L whose light amount is controlled from the optical pickup 30 of the optical disk recording / reproducing apparatus 300. The laser beam L reflected by the optical disk 31 is detected by a light detection unit (not shown) of the optical pickup 30.

This photodetection unit uses the three-beam method when:
A four-split photodetector that detects the return light L 'of the main spot, a two-split photodetector that detects the return light of the preceding side spot, and a two-split photodetector that detects the return light L' of the subsequent side spot And a container. The information read signal generated by the current-voltage conversion in each split photodetector is R
The signal is supplied to the F amplifier 32.

In the RF amplifier section 32, the tracking error signal STE is generated by using a differential push-pull method capable of obtaining a tracking error signal containing almost no DC fluctuation. Also, even if the amount of return light L 'of the main spot fluctuates due to data recording or the like, the wobble signal SWB is generated using reflected light of the preceding side spot so that the track position can be read correctly. . The wobble signal SWB is a signal indicating a preformat address, and the address is read to record data. When the writing of the data is completed, the data processing unit 40 writes the writing end information DEN.
Is generated, and the data processing unit 40 notifies the control unit 50 of the write end information DEN.

The RF signal SRF, tracking error signal STE and focus error signal SFE generated by the RF amplifier 32 are supplied to a clock generator / servo controller 33 shown in FIG. Supplied.

In the clock generation / servo control unit 33 described above, based on the focus error signal SFE supplied from the RF amplifier unit 32, the optical pickup 30 sets the focal position of the laser beam L to the position of the recording layer of the optical disk 31. A focus control signal SFC for controlling an objective lens (not shown) is generated and supplied to the driver 35. In the servo control unit 33, the RF amplifier unit 32
Based on the tracking error signal STE supplied from
A tracking control signal STC for controlling the objective lens of the optical pickup 30 is generated such that the irradiation position of the laser beam L is located at the center of a desired track, and is supplied to the driver 35.

In the driver 35, a focus drive signal SFD is generated based on the focus control signal SFC, and a tracking drive signal STD is generated based on the tracking control signal STC. The generated focus drive signal SFD and tracking drive signal STD are supplied to an actuator (not shown) of the optical pickup 30, whereby the position of the objective lens is controlled, and the laser beam L is moved to the desired track center position. Is controlled so as to focus.

The clock generation / servo control unit 33 converts the RF signal SRF supplied from the RF amplifier unit 32 into a digital signal by performing asymmetry correction and binarization, and converts the digital signal into a read data signal DRF. It is supplied to the processing unit 40. Further, a clock signal CKRF synchronized with the above-described digital signal is generated, and the generated clock signal CKRF is supplied to the data processing unit 40.

Further, the clock generation / servo control unit 33
Then, a thread control signal SSC for moving the optical pickup 30 in the radial direction of the optical disk 31 is generated and supplied to the thread unit 36. This is to prevent the irradiation position of the laser beam L from exceeding the tracking control range. The sled section 36 drives the sled motor based on the sled control signal SSC to move the optical pickup 30 in the radial direction of the optical disc 31.

The data processing section 40 detects the frame synchronization signal FSZ from the data signal after the EFM demodulation, and supplies the frame synchronization signal FSZ to the spindle motor driving section 23. This spindle motor drive unit 2
3, the ATIP synchronization detection signal FSY from the ATIP decoder 34 is used when recording a signal on the optical disk 31, and the frame synchronization signal FSZ from the data processing unit 40 or the ATIP synchronization Synchronization detection signal FS
Y is used to generate a spindle drive signal SSD for rotating the optical disc 31 at a desired speed. By supplying the spindle drive signal SSD generated by the spindle motor drive section 23 to the spindle motor section 22, the optical disk 31 is rotated at a desired speed.

Further, in the data processing section 40, when write data WD is supplied from an external computer device via the interface 43, the write data WD
Is temporarily stored in a RAM 42 which is an example of a storage unit for data management, and the stored write data WD
Is read and encoded into a predetermined sector format. In this example, the RAM 42 is used by being divided into respective memory areas such as a file structure buffer, a data conversion table, and a disk image buffer. The encoded write data is temporarily stored in a RAM 41, which is an example of a storage unit for writing data, and an ECC for error correction is stored.
Is performed. Further, the data processing unit 40 also performs a CIRC encoding process, an EFM modulation, and the like, and generates a write signal DW. This generated write signal DW
Is supplied to the write compensator 37.

In the write compensating section 37, the laser drive signal L based on the write signal DW supplied from the data processing section 40 is used.
An AD is generated, and a laser drive signal LAD is supplied to a laser emission source (laser diode) 11 of the optical pickup 30. Here, in the write compensating unit 37, based on a power compensation signal PC from the control unit 50 described later, the optical disc 3
1, the characteristics of the recording layer, the spot shape of the laser beam L,
The signal level of the laser drive signal LAD is corrected according to the recording linear velocity and the like, the power of the laser beam L output from the laser source of the optical pickup 30 is optimized, and the signal is recorded.

A ROM 51 is connected to the control unit 50, and controls the operation of the optical disk recording / reproducing apparatus 300 based on an operation control program stored in the ROM 51. For example, in the control unit 50, the data processing unit 4
The write fixed address Ax on the optical disk 31 before receiving the write end information DEN from 0 is calculated. In this example, the information recording / reproducing unit 60 has a RAM for writing data.
In this case, the control unit 50 sets the address maximum value of the data to be transferred to the RAM 41 to Amax, the buffer capacity of the RAM 41 to Dbuff, the sector size of the optical disk 31 to Ssec, and the information recording / reproducing unit 60 When the undetermined address due to the holding of the write data in α is α, the above equation (1)
As a result, the write fixed address A on the optical disc 31
x is calculated.

Alternatively, the information recording / reproducing section 60 is provided with a RAM 41
Is provided, at least the maximum address value of data to be transferred to the RAM 41 is Amax,
The amount of data existing in the optical disk 41 is defined as Dsiz.
Assuming that the sector size of No. 1 is Ssc and the undetermined address due to the holding of the write data in the information recording / reproducing unit 60 is α, the control unit 50 calculates the write-determined address Ax on the optical disc 31 by the above-mentioned equation (2). It is done as follows.

Further, when the data processing RAM 40 is connected to the data processing unit 40 and the information recording / reproducing unit 60 is provided with the RAM 41, the memory capacity of the RAM 41 is ignored compared to the memory capacity of the RAM 42. If possible, at least the maximum address value of the data to be transferred to the RAM 41 is Amax, and the undetermined address due to the holding of the write data in the information recording / reproducing unit 60 is α. Calculates the write fixed address Ax on the optical disk 31.

It is determined whether or not the data is to be discarded from the RAM 42 based on the write fixed address Ax. The control unit 50 permits the discard of the data written to the address before the write confirmation address Ax.
Discarding of data after the write confirmed address Ax and from the write confirmed address Ax to the maximum value of the address at the time of transfer is prohibited.

In this example, the write confirmed address Ax is calculated, and the control unit 50 adds a discardable flag to data written to an address before the write confirmed address Ax. For example, the control unit 50 writes the write data RW to which the discardable flag is added.
Is discarded from the data writing RAM 41 as needed.

When a write error occurs in the control unit 50, the information recording / reproducing unit 60 is
1 is restored, and the address and data are read from the optical disc 31 in the ascending direction starting from the write confirmed address Ax, and the maximum value of the address at which the data is actually written on the optical disc 31 is Is detected. Alternatively, when a write error occurs, the control unit 50 obtains an error occurrence address from the information recording / reproducing unit 60, controls the information recording / reproducing unit 60 to repair the optical disc 31, and simultaneously executes The preformat address DAD and the recording data RD are read from the optical disk 31 in the descending direction starting from the address, and the maximum value of the address where data is actually written on the optical disk 31 is detected.

The control unit 50 controls the subcode signal DSQ generated by the data processing unit 40 and the ATIP decoder 34.
The reproduction position and the recording position on the optical disk 31 are determined on the basis of the preformat address DAD from the CPU and the control signal CTA is supplied to the clock generation / servo control unit 33 and the control signal CTB to the data processing unit 40, and the data is supplied. Recording / reproducing operation.

The control unit 50 generates a power compensation signal PC based on the setting information of the recording laser power indicated by the pre-format address DAD, and generates the power compensation signal PC.
To supply. A control signal CTC is supplied from the control unit 50 to the RF amplifier unit 32, and the RF amplifier unit 32 controls the laser emission source of the optical pickup 30 to turn on / off the laser and reduces laser noise and disturbance to the RF signal. Processing for superimposing a high frequency on the beam L is also performed.

At the time of reading information in this device 300,
The read data signal DRF is EFM-demodulated by the data processing unit 40 connected to the clock generation / servo control unit 33, and the RAM 41 is used to perform deinterleave processing and error correction by CIRC (Cross Interleave Reed-Solomon Code). Processing is performed. Furthermore, a sync pattern is detected and descrambling processing and ECC (Error Correction) are performed.
ing Code). The data signal subjected to the error correction processing here is stored in a RAM 42 functioning as a buffer memory, and then transferred as a reproduced data signal RD to an external computer device or the like via an interface 43.

As described above, according to the optical disk recording / reproducing apparatus 300 according to the embodiment of the present invention, the above-described data writing system 100 is applied to the apparatus. That is, the optical disk 31 on which the address is recorded in advance
When data is supplied from the control unit 50 to the information recording / reproducing unit 60 when writing data to the
Then, while the optical disk 31 is irradiated with the light beam,
The address is read and data is recorded, and after this recording, write end information DEN relating to the data is generated. Before receiving the write end information DEN from the data processing unit 40, the control unit 50 calculates the write fixed address Ax on the optical disc 31 before receiving the write end information DEN, and
It is determined based on the write confirmed address Ax whether to discard the data supplied to.

For example, in the control unit 50, of the data transferred to the information recording / reproducing unit 60, discarding of the data written to the address before the write confirmed address Ax is permitted, and the write confirmed address Ax is used. After that, the discard of data from the write confirmed address Ax to the maximum value of the address at the time of data transfer is prohibited.

Therefore, even if the writing of a series of data has not been completed, it is possible to execute the discarding process of the data written to the address before the write fixed address Ax. Confirmed address Ax
Only the data from the address to the maximum value of the address at the time of data transfer can be held.

Thus, it is possible to minimize the amount of write data WD which must be stored in the RAM 41 by the data processing unit 40 and must be dealt with when an unknown write error occurs in the information recording / reproducing unit 60. . Moreover, the memory occupation time used for data transfer in the data processing unit 40 can be reduced.

Further, in the present embodiment, when a write error occurs, a more accurate written address can be determined, so that data can be reliably recovered from a write error generated during execution of the stream write mode. In addition, by adopting the recovery method * 1 or * 2, it is possible to prevent data already written on the optical disk 31 from being redundantly recorded. By doing so, data to be repeatedly written on the optical disk 31 can be reduced, and the disk capacity can be used more effectively. It is sufficient to hold only necessary and sufficient data for data recovery in the RAM 42 in response to a write error occurring during the execution of the mode.

In this example, the determination methods # 1 to # 3 can be adopted for the write confirmed address Ax. Further, in this example, the write data WD may be subjected to predetermined processing and then transferred from the RAM 42 to the RAM 41, and then immediately discarded. Good. When a rewrite error occurs in a recording area before the address is determined, the write data WD can be reused as it is as write data for restoration.

Furthermore, even if the write-permitted address in the RAM 42 becomes a non-writable address after the occurrence of an error, if a list of track recording positions and the like reflected by data restoration is created in advance, the write-permitted address can be changed. It is also possible to correct the disk image in consideration of the position offset change.

In this example, the RAM 42 is described as being divided into three parts. However, the present invention is not limited to this. Each memory part such as a file structure buffer, a data conversion table, and a disk image buffer is provided. May be managed by the data processing unit 40 and the control unit 50.

Further, the present invention is applicable not only to a CD-R but also to a write-once type device, for example, a device which writes data in ascending address order and does not have an address conversion function. Can be. The present invention can also be used when a disk-type recording medium that is not a write-once type is operated at a high speed like a write-once type. For example, C
The present invention can be applied to a case where the D-RW is mounted on the device 300 and data is written in the fixed packet stream mode.

[0148]

As described above, according to the data writing system of the present invention, the case where data is written on a disk-shaped recording medium in which addresses are recorded in advance,
Data management means is provided for calculating a write final address in the disk-shaped recording medium before receiving the data write end information, so as to determine whether or not to discard the transferred data based on the write final address. It was done.

With this configuration, even if all of the series of data writing has not been completed, it is possible to execute the discard permission processing of the data written to the address before the write confirmed address. In addition, of the data transferred to the information recording unit, the discard prohibition process of the data after the write fixed address and reaching the maximum value of the address at the time of transfer can be executed. Therefore, it is possible to minimize the amount of write data that must be stored and stored in the data management means to cope with the occurrence of an unknown write error in the information recording means.

According to the data writing method of the present invention,
When writing data to a disk-shaped recording medium in which an address is recorded in advance, before receiving the write end information of the data, the write-determined address in the disk-shaped recording medium is estimated, and then the data is transferred based on the write-determined address. It is determined whether or not to discard the data.

With this configuration, even if all of the series of data writing has not been completed, it is possible to execute the discard permission processing of the data written to the address before the write confirmed address. In the data transferred to the information recording means, the discard prohibition process can be executed until a series of data writing of data which is after the write fixed address and reaches the maximum value of the address at the time of transfer is completed. . Therefore, the memory occupation time used for data transfer can be reduced.

According to the optical disk recording / reproducing apparatus of the present invention, when data is to be written on a disk-shaped recording medium on which an address has been recorded in advance, the data is written on the disk-shaped recording medium before receiving the data write end information. Control means for calculating a confirmed address is provided, and it is determined whether or not the transferred data is to be discarded based on the confirmed write address.

With this configuration, even if the writing of a series of data has not been completed, it is possible to execute the discard permission processing of the data written to the address before the write confirmed address. In addition, of the data transferred to the information recording unit, the discard prohibition process of the data after the write fixed address and reaching the maximum value of the address at the time of transfer can be executed. Therefore, it is possible to minimize the amount of write data that must be stored and stored in the control unit to deal with the occurrence of an unknown write error in the information recording unit.

The present invention relates to a write-once optical disc (CD-
R, DVD-R), a rewritable optical disk (CD-RW), and a writable optical disk such as a mini disk (MD).

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration example of a data writing system 100 according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating a processing example according to a data writing method as the embodiment;

FIG. 3 is a block diagram showing a configuration example of a data writing system 200 as an embodiment according to the present invention.

FIG. 4 is a format showing an example of a frame structure of a signal recorded on an optical disc.

FIG. 5 is an image diagram of a data string showing an example of detecting the maximum value of a written address when a write error occurs.

FIG. 6 is a flowchart showing an example (part 1) of data processing by the personal computer 10.

FIG. 7 is a flowchart showing an example (part 2) of data processing by the personal computer 10.

FIG. 8 is an image diagram showing an example of the contents of a file structure buffer 24;

FIG. 9 is a flowchart showing an example of data writing processing (task 1) in the optical disk driver 20.

FIG. 10 is a flowchart showing an example of data writing processing (task 2) in the optical disk driver 20.

FIG. 11 is a flowchart showing an example of updating file data in the data writing system 200.

FIG. 12 is an optical disc recording / reproducing apparatus 3 as an embodiment.
It is a block diagram which shows the example of a structure of 00.

FIG. 13 is a transmission / reception image diagram showing an example of a state transition in a variable write mode according to a conventional method.

FIG. 14 is a time chart showing an example of the total write time related to the data transfer time, write preparation time, and write operation time.

FIG. 15 is a diagram showing an example of a state transition in a variable-length write mode according to a conventional method and an example of its total write time.

[Explanation of symbols]

1 ... data management means, 2 ... information recording means, 3 ...
..Disc-shaped recording medium, 10 personal computer (data management means), 11, 21 storage means, 12 memory section (storage means), 15, 45 control device, 20
... Optical disk driver, 22 ... Spindle motor unit, 23 ... Spindle motor drive unit, 30 ...
Optical pickup, 31 ... optical disk (disk-shaped storage medium), 32 ... RF amplifier section, 33 ... clock generation / servo control section, 34 ... ATIP decoder,
37: write compensator, 40: data processor, 43
... Interface, 50 ... Control unit, 100,
200: data writing system, 300: optical disk recording / reproducing device

Claims (25)

[Claims] 1. A data writing system for writing data on a disk-shaped recording medium on which addresses are recorded in advance, comprising: irradiating a light beam on the disk-shaped recording medium;
An information recording unit that reads the address to record the data, and generates write end information related to the data; and the disc before transferring the data to the information recording unit and receiving the write end information from the information recording unit. A data management means for calculating a write-determined address in the recording medium and determining whether to discard the transferred data based on the write-determined address. 2. The method according to claim 1, wherein the data is written to the disk-shaped recording medium in ascending address order, wherein the data management means is a part of the data transferred to the information recording means which is prior to the write fixed address. Discarding data written to the address, prohibiting discarding of data after the write confirmed address and from the write confirmed address to the maximum address at the time of data transfer. The data writing system according to claim 1, wherein: 3. The information recording means is provided with a storage means for writing data, wherein the data management means sets at least a write fixed address on the disk-shaped recording medium to Ax and transfers the data to the storage means. The maximum address of the data to be
Ax = Amax− (Dbuff / Ssec + α), where x is a buffer capacity of the storage unit is Dbuff, a sector size of the storage medium is Ssec, and an undetermined address due to a write margin in the information recording unit is α. The data writing system according to claim 1, wherein? 4. A case in which the information recording means is provided with a storage means for writing data, wherein the data management means sets at least a write fixed address on the disc-shaped recording medium to Ax and transfers the data to the storage means. The maximum address of the data to be
x, Ax = Amax- (Dsiz, where Dsiz is the data amount existing in the storage unit, Ssc is the sector size of the storage medium, and α is the undetermined address due to the write margin in the information recording unit. / Ssc + α). The data writing system according to claim 1, wherein 5. The data management means is provided with a storage means for data management, and the information recording means is provided with a storage means for writing data, wherein a memory capacity of the storage means for data writing is provided. Is negligible compared to the memory capacity of the data management storage means, the data management means sets at least the write fixed address in the disk-shaped recording medium to Ax, and the address of the data to be transferred to the storage means. Maximum value is Ama
2. The data writing system according to claim 1, wherein Ax = Amax−α is calculated, where x is an address undetermined part due to a write margin in the information recording unit. 6. The method according to claim 6, wherein said write confirmed address is calculated, and said data management means adds discard permission information to data written to an address prior to said write confirmed address. 2. The data writing system according to claim 1, wherein: 7. The data writing system according to claim 6, wherein the data management unit is configured to discard the data to which the discard permission information is added from a data management storage unit as needed. 8. The data management means controls the information recording means to repair a disk-shaped recording medium when a write error occurs in the information recording means, and starts from the write fixed address. The address and data are read from the disk-shaped recording medium in the ascending order, and the maximum value of the address where data is actually written on the disk-shaped recording medium is detected. 2. The data writing system according to 1. 9. The data management unit, when a write error occurs in the information recording unit, acquires an error occurrence address from the information recording unit, and restores the disc-shaped recording medium to the information recording unit. The address and data are read from the disk-shaped recording medium in a descending direction starting from the error occurrence address, and the maximum value of the address at which data is actually written on the disk-shaped recording medium is detected. 2. The data writing system according to claim 1, wherein the data writing system is configured to perform the data writing. 10. A method for writing data to a disk-shaped recording medium on which addresses are recorded in advance, wherein a data writing system irradiates a light beam to the disk-shaped recording medium by receiving the data and the address. While recording data while reading the address of the disk-shaped recording medium, and generating write end information each time a series of the data is written, the data management system transfers the data and the address to the data recording system, Before receiving write completion information from the data writing system, a write final address in the disk-shaped recording medium is estimated, and it is determined whether to discard transferred data based on the write final address. Data writing method. 11. A method for writing the data on the disk-shaped recording medium in an ascending address order, wherein discarding data written to an address prior to the write fixed address among the transferred data. 11. The method according to claim 10, wherein the discarding of data after the write confirmed address and from the write confirmed address to the maximum value of the address at the time of data transfer is prohibited. Data writing method. 12. The write fixed address is determined by at least a write margin depending on a processing capability of a recording system for recording data on the disk-shaped recording medium from a maximum address value of data to be written on the disk-shaped recording medium. 11. The data writing method according to claim 10, wherein the address undetermined portion is subtracted. 13. The method according to claim 10, wherein said write confirmed address is calculated, and discard permission information is added to data written at an address before said write confirmed address. Data writing method described in 1. 14. The data writing method according to claim 13, wherein the data to which the discard permission information is added is discarded sequentially. 15. When a write error occurs during data recording, the disk-shaped recording medium is repaired, and
Addresses and data are read from the disk-shaped recording medium in ascending order starting from the write-determined address, and the maximum value of the address at which data is actually written to the disk-shaped recording medium is obtained. The data writing method according to claim 10, wherein: 16. When a write error occurs during the data recording, an error occurrence address on the disc-shaped recording medium is obtained, and the disc-shaped recording medium is repaired.
An address and data are read from the disk-shaped recording medium in a descending direction from the error occurrence address as a starting point, and a maximum value of an address at which data is actually written on the disk-shaped recording medium is obtained. Item 1
0. Data writing method described in 0. 17. An optical disk recording / reproducing apparatus for writing data to an optical disk on which an address is recorded in advance, wherein the optical disk is irradiated with a light beam to read the address, record the data, and write the data. Information recording means for generating end information; transferring data to the information recording means; calculating a write final address on the disc-shaped recording medium before receiving write end information from the information recording means; An optical disk recording / reproducing apparatus, comprising: a control unit that determines whether to discard transferred data based on the data. 18. A case in which data is written to the disk-shaped recording medium in an ascending address order, wherein the control means stores, in the data transferred to the information recording means, an address prior to the write fixed address. Discarding of written data is permitted, and discarding of data after the write confirmed address and from the write confirmed address to the maximum value of the address at the time of data transfer is prohibited. The optical disk recording / reproducing apparatus according to claim 17, wherein 19. The information recording means is provided with a storage means for writing data, wherein the control means sets at least a write fixed address on the disc-shaped recording medium to Ax and transfers the address to the storage means. The maximum address value of data is Ama
Ax = Amax− (Dbuff / Ssec + α), where x is a buffer capacity of the storage unit is Dbuff, a sector size of the storage medium is Ssec, and an undetermined address due to a write margin in the information recording unit is α. The optical disk recording / reproducing apparatus according to claim 17, wherein? 20. A case in which the information recording means is provided with a storage means for writing data, wherein the control means sets at least a write fixed address on the disc-shaped recording medium to Ax and transfers the address to the storage means. The maximum address value of data is Ama
x, Ax = Amax- (Dsiz, where Dsiz is the data amount existing in the storage unit, Ssc is the sector size of the storage medium, and α is the undetermined address due to the write margin in the information recording unit. The optical disc recording / reproducing apparatus according to claim 17, wherein / Ssc + α) is calculated. 21. A storage system for data management provided in said control means and a storage means for data writing provided in said information recording means, wherein a memory capacity of said storage means for data writing is reduced. If the memory capacity of the storage unit for data management can be ignored, the control unit sets at least the write fixed address on the disk-shaped recording medium to Ax, and the maximum address value of data to be transferred to the storage unit. Ama
18. The optical disk recording / reproducing apparatus according to claim 17, wherein Ax = Amax- [alpha] is calculated, where x is an address undetermined part due to a write margin in the information recording unit. 22. The method according to claim 19, wherein the write confirmation address is calculated, wherein the control unit adds discard permission information to data written to an address before the write confirmation address. The optical disk recording / reproducing apparatus according to claim 17, wherein: 23. The optical disk recording / reproducing apparatus according to claim 22, wherein the control unit is configured to discard the data to which the discard permission information is added from a data management storage unit at any time. 24. The control means, when a write error occurs in the information recording means, controls the information recording means to repair the disk-shaped recording medium, and starts from the write fixed address. 18. An address and data are read from the disk-shaped recording medium in the ascending order, and a maximum value of an address at which data is actually written on the disk-shaped recording medium is detected. An optical disk recording / reproducing apparatus according to claim 1. 25. When a write error occurs in the information recording unit, the control unit acquires an error occurrence address from the information recording unit, and causes the information recording unit to restore a disk-shaped recording medium. And read out the address and data from the disc-shaped recording medium in a descending direction from the error occurrence address as a starting point, and detect the maximum value of the address at which data is actually written on the disc-shaped recording medium. 18. The optical disk recording / reproducing apparatus according to claim 17, wherein: