JP2001202718A - Method for recording information and recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information recording method and a recording and reproducing device, by which a final DRAW data position is easily decided with little reduction in a data recording area in spite of the increase of DRAW times. SOLUTION: It is decided whether nothing is written in an optical disk or not (S3) and management information, recording data and partition data are recorded (S4-S6) when nothing is written in the disk (S3: YES). When recording is already performed in the optical disk (S3: NO), management information is read (S9), succeeding partition data is read based on an address in management information (S10) and it is decided whether read partition data indicates a recording end position or not (S11). When the recording end position is indicated (S11: YES), a writing area is confirmed (S12), partition data which does not indicate the recording end position is recorded in a partition area (S13) and, besides, recording data is tracked after the partition area (S4-S6).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an information recording method and a recording / reproducing apparatus for recording recording data on an optical disk.

[0002]

2. Description of the Related Art A write-once optical disc capable of recording data only once has been developed. This write-once optical disc is formed by irradiating a laser beam to an organic dye applied in a pre-groove in which a wobbling signal and position information for maintaining a constant linear velocity at the time of recording are formed immediately before a reflective layer. Information is recorded by causing an optical change.

A conventional apparatus for recording data on such a write-once optical disc performs recording according to a format as shown in FIG. That is, FIG.
(A) shows a recording format of a write-once optical disc (CD-R), where PCA is an area for checking write power, RI is a lead-in area, DATA is a write data area, and RO is a lead-out area. .

[0004] Conventionally, data writing to a CD-R is performed as shown in FIG.
As shown in (A), for each piece of data to be additionally written, RI data and RO data are added before and after the additionally written data to form a CD-R.
I try to write to. As shown in FIG. 5B, the format of each data to be written on the CD-R is such that a synchronization signal (SYNC) and a synchronization signal number (S #) are added for each fixed length of the write data. I am trying to put it.

[0005]

As described above, when writing data to a conventional CD-R, a large amount of lead-in data and lead-out data are added to each data to be additionally written.

For this reason, the lead-in and lead-out areas increase according to the number of times of additional recording on the CD-R, and the recording area for recording necessary data decreases accordingly. When reproducing data recorded in this manner, since it is unknown how far data has been written, it is not possible to determine the last lead-out, and after passing through the last lead-out area, Reading is performed, and the determination is made by knowing that writing has not been performed (not formatted).

Therefore, if formatting is not performed, a synchronization signal used for spindle servo control cannot be obtained, and synchronization is lost, and information must be reproduced by synchronizing by complicated processing again. In the present invention, even if the number of times of additional writing increases, the decrease in the data recording area is small,
It is another object of the present invention to provide an information recording method and a recording / reproducing apparatus which can easily determine a recording end position.

[0008]

Before describing the means for solving the above problems, the principle of the present invention will be described with reference to FIG. FIG. 4A shows a CD-ROM used in the present invention.
FIG. 4B shows an R recording format, and FIG. 4B shows a write data format. The write data format shown in FIG. 4B uses the same format as that described with reference to FIG.

In FIG. 4A, a write power check area (PCA), a lead-in area (RI), data (DATA), and a lead-out area (RO) are the same as those described with reference to FIG. is there. In the present invention, a management information area (MA) for recording a directory of data to be recorded and a partition address and the like indicating a recording end position before data to be additionally recorded, and a partition area (PA) for indicating a recording end position next to the recording data. Provide. Since the data amount of MA and PA is much smaller than that of RI and RO, the reduction of the data area due to the addition of MA and PA is very small.

The data to be written into the PA is a predetermined binary data (P). As shown in FIG.
When performing the second write (Chapter) on the CD-R on which the first write (Chapter 1) has been performed, first, the MA is read to know the PA position, and the partition data (P) is recorded at the PA position. It is determined whether or not there is any data. If (P) is recorded, MA, DATA and PA shown in Chapter 2 are written after rewriting data (E) other than (P). . Therefore, when a plurality of additional recordings are performed, the partition data (P) indicating the end position is recorded only in the PA of the last additionally recorded Chapter, and the previous PA of the Chapter is rewritten with (E). The data changes to data other than (P), and the write end position can be easily known. In addition, when the additional recording on the CD-R is completed, as shown in FIG.
Write O.

Next, means for solving the problem will be described. The present invention according to claim 1 is an information recording method for recording recording data on an optical disk, wherein a recording format for recording the recording data on the optical disk is changed to a recording format for recording the recording data. A data area, which is arranged after the write data area, and is configured with a partition area for recording partition data indicating whether or not it is a recording end position, and determines whether or not the optical disc has not been written; If the optical disc has not been written, the recording data is recorded in accordance with the recording format.If the optical disc has been recorded, the partition data of the partition area is read, and whether the read partition data indicates the recording end position. The partition data indicates the recording end position. If it has, then record the partition data showing no recording end position in the partition area, also after the partition area, characterized by additional recording said recording data according to the recording format.

According to a second aspect of the present invention, in the information recording method according to the first aspect, when the partition data does not indicate a recording end position, the next partition until the read partition data indicates a recording end position. An operation of reading partition data of the area and determining whether or not the read partition data indicates a recording end position is repeated.

According to a third aspect of the present invention, there is provided the first or second aspect.
In the information recording method according to any one of the above, when the recording data is additionally recorded according to the recording format, the partition data in the partition area in the recording format is set to an unwritten state, and indicates a recording end position. It is characterized by.

The present invention according to claim 4 provides the invention according to claims 1 to 3
In the information recording method according to any one of the above, the recording format further includes a management information area arranged before the write data area and for recording an address of the partition area.

According to a fifth aspect of the present invention, in the information recording method according to the fourth aspect, if the partition data does not indicate a recording end position, the partition area is shifted from the management area disposed after the partition area. An address of the area is read, and partition data is read from the next partition area based on the address.

According to a sixth aspect of the present invention, there is provided a recording / reproducing apparatus for recording recording data on an optical disk, the recording format for recording the recording data on the optical disk, and the recording format for recording the recording data. A write data area, and a partition area arranged after the write data area for recording partition data indicating whether or not it is a recording end position, and it is determined whether or not the optical disc is unwritten. First determining means for performing recording, recording means for recording the recording data in accordance with the recording format when the optical disk has not been written, and reading for reading partition data in the partition area when the optical disk has been recorded. Means and whether or not the read partition data indicates a recording end position The partition data indicates a recording end position, the recording unit records partition data not indicating a recording end position in the partition area, and After the area, the recording data is additionally recorded according to the recording format.

According to a seventh aspect of the present invention, in the recording / reproducing apparatus according to the sixth aspect, when the partition data does not indicate a recording end position, the reading means continues until the read partition data indicates a recording end position. Is
The partition data of the next partition area is read, and the second determining means repeats the operation of determining whether the read partition data indicates the recording end position.

The present invention according to claim 8 provides the present invention according to claim 6 or 7.
In the recording and reproducing apparatus according to the above, the recording means, when additionally recording the recording data according to the recording format,
The partition data of the partition area in the recording format is set in an unwritten state, and indicates a recording end position.

The present invention described in claim 9 is the invention according to claims 6 to 8.
5. The recording / reproducing apparatus according to claim 1, wherein the recording format further includes a management information area arranged before the write data area, for recording an address of the partition area.

According to a tenth aspect of the present invention, in the recording / reproducing apparatus according to the ninth aspect, when the partition data does not indicate a recording end position, the reading means includes:
An address of the partition area is read from the management area located behind the partition area, and partition data is read from a next partition area based on the address.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIG. FIG. 1 is a configuration diagram of an embodiment of the present invention. In FIG. 1, 1 is a write-once optical disc (CD-R), 2 is a motor, 3 is a pickup, 4 is a servo circuit, 5 is a laser, 6 is an encoder, 7 is a power control circuit of the laser 5,
8 is a reproduction amplifier, 9 is a decoder, 10 is a guide signal decoder, 11 is a management information reading unit, 12 is a management information writing unit, 13 is a partition data reading unit, 14 is a judgment unit, and 15 is partition data (re).
A writing unit, 16 is a control unit, 17 is an input unit, 18 to 23 are interfaces (I / O), and 24 is a processor (CPU) that performs processing.

Next, the operation at the time of recording according to the present invention will be described with reference to FIG. In the process S1, the servo circuit 4 performs a servo process for controlling the rotation of the motor 2, the tracking and the focus of the pickup 3. In the processing S2, the control unit 16 instructs the power control circuit 7 to
The output of the laser 5 is increased in the PCA area of the CD-R shown in (A), and a power optimum value at the time of writing is checked.

In step S3, if the CD-R1 is an unwritten optical disk, the process proceeds to step S4, and if it is already written, the process proceeds to step S9. In processing S4, the management information writing unit 12 creates management information,
O 18, output from the pickup 3, modulate the output of the laser 5 by encoding with the encoder 6,
1 to write management information.

In step S5, the control section 7 outputs the recording data input from the I / O 22 via the I / O 18,
Write data to CD-R1. When the data writing is completed, in step S6, the partition data (re) writing section 15 writes the partition data (P).

In the process S7, the CD-R1
If the input for terminating the writing has not been input, the process ends. If the input has been input, the process proceeds to step S8 and FIG.
As shown in (A), the process is completed by writing to the lead-out data and MO. If the determination in step S3 is NO, the process proceeds to step S9, in which the management information reading unit 11 reads the management information from the CD-R1 via the I / O 20.

In step S10, the partition data reading section 13 reads the partition data from the address corresponding to the address where the partition data is recorded in the management information read in step S9. In the process S11, the determination unit 14 determines whether or not the data read in the process S10 is the regular partition data (P). If the determination is YES, the process proceeds to the process S12, and if the determination is NO, the process proceeds to the process S12. The process proceeds to step S9, where management information is read, and steps S9 to S11 are repeated.

In step S12, if the CD-R1 has no write area, the process proceeds to step S8, and if there is a write area, the process proceeds to step S13. In the process S13, the partition data (re) writing unit 15 rewrites data (E) different from the regular partition data (P) to the address of the partition data read in the process S10.
Move to 4.

That is, the PA of Chapter 1 in FIG.
If (P) is detected in (1), (E) rewriting is performed on the PA of Chapter 1 so that the recording is not (P), and only (P) of the last recorded PA is recorded. You. In the embodiment, the management information is written in the process S4 by writing only the management information for the data to be written. Writing may be performed by adding information.

Further, in the embodiment, when the partition data (P) is detected, (E) is written to write additional data, so that (P) is written only in the PA of the last Chapter. However, no data is written in the PA for the additionally written data, and if there is an unwritten PA during the additional writing, this position is determined to be the previous write end position and (P) is written. Subsequently, additional data may be written.

That is, in the added Chapter PA, SYNC and S # shown in FIG. 4B are written, but the write data is not written. S
Since the YNC has been written, there is no problem of loss of synchronization. Next, an operation at the time of reproduction will be described with reference to FIG.

When a reproduction command is input from the input unit 17 in step S21, the process proceeds to step S22, where processing of the servo system of focus, spindle, and tracking is performed. In the processing S23, the management information reading unit 11
Reads the management information from the MA of the first Chapter.

In step S24, the partition data reading section 13 reads data from the address of the partition data in the management information read in step S23. In the process S25, the determination unit 14 determines whether or not the data read in the process S24 is the regular partition data (P). If the determination is NO, the process proceeds to the process S23 to read the management information of the next Chapter. Processing S
23 to S25 are repeated.

If the determination in the process S25 is YES, the process proceeds to the process S26, referring to the read management information, skipping the head to the position corresponding to the command input in the process S21, and proceeding to the process S27. Reads recorded data. When the reading of the data is completed and the next command is input, the process proceeds to step S26, and when the next command is not input, the process ends.

[0034]

As described above, according to the present invention, even if the number of times of additional writing increases, the decrease in the data recording area is small and the recording end position can be easily found.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is an operation flowchart at the time of recording according to the embodiment.

FIG. 3 is an operation flowchart at the time of reproduction in the embodiment.

FIG. 4 is a diagram showing a recording format on a write-once optical disc according to the present invention.

FIG. 5 is a diagram showing a recording format on a conventional write-once optical disc.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Write-once optical disk (CD-R) 2 Motor 3 Pickup 4 Servo circuit 5 Laser 6 Encoder 7 Power control circuit 8 Reproduction amplifier 9 Decoder 10 Guide signal decoder 11 Management information reading part 12 Management information writing part 13 Partition data reading part 14 Judgment unit 15 Partition data (re) write unit 16 Control unit 17 Input unit 18-23 Interface (I / O) 24 Processor (CPU)

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[Procedure amendment]

[Submission date] December 13, 2000 (200.12.
13)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction contents]

The data to be written into the PA is a predetermined binary data (P). As shown in FIG.
When the second write (Chapter 2 ) is performed on the CD-R on which the first write (Chapter 1) has been performed, first, the MA is read to know the PA position, and the partition data (P) is recorded at the PA position. It is determined whether or not (P) is recorded. If (E) other than (P) is rewritten, MA, DATA, and PA shown in Chapter 2 are written after rewriting data (E). To Therefore, when a plurality of additional recordings are performed, the partition data (P) indicating the end position is recorded only in the PA of the last additionally recorded Chapter, and the previous PA of the Chapter is rewritten with (E). The data changes to data other than (P), and the write end position can be easily known. In addition, when the additional recording on the CD-R is completed, as shown in FIG.
Write O.

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] Figure 3

[Correction method] Change

[Correction contents]

FIG. 3

[Procedure amendment 3]

[Document name to be amended] Drawing

[Correction target item name] Fig. 5

[Correction method] Change

[Correction contents]

FIG. 5

Claims (10)

[Claims] 1. An information recording method for recording recording data on an optical disk, comprising: a recording format for recording the recording data on the optical disk; a write data area for recording the recording data; A partition area for recording partition data indicating whether or not a recording end position is provided after the write data area; and determining whether or not the optical disc is unwritten. In the case of, the recording data is recorded in accordance with the recording format. If the optical disc has been recorded, the partition data of the partition area is read, and it is determined whether or not the read partition data indicates a recording end position. And the partition data indicates a recording end position. In this case, the information recording method is characterized in that partition data that does not indicate a recording end position is recorded in the partition area, and the recording data is additionally recorded after the partition area in accordance with the recording format. 2. If the partition data does not indicate the recording end position, the partition data of the next partition area is read until the read partition data indicates the recording end position, and the read partition data sets the recording end position. 2. The information recording method according to claim 1, wherein an operation of determining whether or not the information is indicated is repeated. 3. The recording apparatus according to claim 1, wherein, when the recording data is additionally recorded in accordance with the recording format, the partition data in the partition area in the recording format is left unwritten to indicate a recording end position. Or the information recording method described in 2. 4. The recording format according to claim 1, further comprising a management information area arranged before the write data area, for recording an address of the partition area. The information recording method described in (1). 5. When the partition data does not indicate a recording end position, an address of the partition area is read from the management area arranged behind the partition area, and a partition is read from the next partition area based on the address. 5. The information recording method according to claim 4, wherein data is read. 6. A recording / reproducing apparatus for recording recording data on an optical disc, comprising: a recording format for recording the recording data on the optical disc; a write data area for recording the recording data; A first determination unit disposed behind the write data area and configured to record partition data indicating whether or not it is a recording end position; and a first determination unit configured to determine whether the optical disk has not been written. Recording means for recording the recording data in accordance with the recording format when the optical disk has not been written; reading means for reading partition data of the partition area when the optical disk has been recorded; Second determination for determining whether or not the data indicates the recording end position And stage consists, if the partition data indicates recording end position, the recording means records the partition data showing no recording end position in the partition area,
A recording / reproducing apparatus, wherein the recording data is additionally recorded after the partition area according to the recording format. 7. If the partition data does not indicate the recording end position, the reading means reads the partition data of the next partition area until the read partition data indicates the recording end position, and performs the second determination. 7. The information recording method according to claim 6, wherein the means repeats an operation of determining whether the read partition data indicates a recording end position. 8. The recording means according to claim 1, wherein when the recording data is additionally recorded in accordance with the recording format, the partition data in the partition area in the recording format is in an unwritten state, and indicates a recording end position. 8. The recording / reproducing apparatus according to claim 6, wherein: 9. The recording format according to claim 6, further comprising a management information area disposed before the write data area, for recording an address of the partition area. The recording / reproducing apparatus according to claim 1. 10. When the partition data does not indicate a recording end position, the reading means reads an address of the partition area from the management area disposed behind the partition area, and reads the address of the partition area based on the address. 10. The recording / reproducing apparatus according to claim 9, wherein the partition data is read from a next partition area.