JP2003272164A - Signal recording method of information recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To format a phase-change type information recording medium with high quality and also at high speed, to provide a production condition for efficiently formatting the phase-change type information recording medium, to provide a condition for formatting with good yield with an apparatus formatting the phase-change type information recording medium, to provide a production facility for easily and inexpensively formatting the phase-change type information recording medium, and to obtain a phase-change type information recording medium formatted in the above-mentioned way. <P>SOLUTION: In the method of formatting the phase-change type information recording medium, the recording rate for recording medium management information on a PMA area is made different from the recording rate for recording the information on a data area. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical recording medium, in particular, a phase change capable of recording / reproducing information and rewriting by causing a phase change in a recording layer material by irradiating a light beam. The present invention relates to a type information recording medium, a method of formatting the type information recording medium, and an apparatus thereof, and is applied to a bonded type phase change type information recording medium.

[0002]

2. Description of the Related Art A phase change type optical information recording medium, for example, a CD-
The RW disc cannot be used immediately even when mounted in a drive (disc drive) in a state where information has not been recorded, and a formatted disc in which information is recorded in advance is generally used. In particular, if you want to perform random accessible packet writing (writing that changes recording of files and data for each packet), use a CD
-Operation of writing address information data on the entire surface of the RW disk and UDF (Universal DiskForma) at a specific address.
t) Two steps of writing data and PMA data are required. When the above-mentioned formatted CD-RW disc is actually mounted in a drive for use, the address information data first written in the format is:
Since the data to be newly written is overwritten, the address information written first is often recorded at high speed.

In particular, when recording on the entire surface of a CD-RW for 74 minutes is performed at the conventional 1 × speed (CLV: 1.2 m / sec), it takes 74 minutes just to record the address information, but the maximum recording speed of the recording drive, For example, 10x speed (CLV: 12m
/ Sec), the address information recording is 8 when the signal recording is performed.
Complete in minutes. The address information recording quality of the overwritten data area is not particularly important in this case. However, medium management information such as UDF data and PMA data is rarely overwritten and is often used mainly in read-only. Therefore, it is preferable that the quality of the recording signal is good. Further, since the recording capacity of such medium management information is very small, it is required to improve the quality of the recording signal rather than shorten the time required for recording. Therefore, there is a prior application for a technique of recording the medium management information with a higher power than the address information, but it is insufficient when the recording signal quality deteriorates due to a factor other than the recording power. Other than that, it was necessary to investigate in more detail whether there is a method for recording medium management information with high quality. Generally, recording of address information starts from the inner peripheral portion of the disc and is completed at the outermost peripheral portion,
The medium management information may be recorded only in the innermost circumference, but in many cases, the information is often recorded in two or more places of the innermost circumference and the outermost circumference, and for a formatting device, Since the movement of the optical unit is fast and frequent, the environment is prone to troubles.

Regarding the handling of medium management information and user data information in an overwritable phase change type information recording medium, for example, in Japanese Patent Laid-Open No. 8-7343, light is irradiated when manufacturing a phase change type optical recording medium. Then, after the initialization process for changing the recording layer of the optical recording medium from the amorphous state to the crystalline state, the recording power level is a value equal to or lower than the optimum recording power and the erasing power level is higher than the optimum erasing power. By overwriting with the power that is the value, speeding up the conventional initialization process is highly reliable, and it is difficult to obtain good and stable recording / reproducing characteristics from the first recording, and it is also difficult to recover the characteristics. JP-A-10-3694 discloses an optical information recording medium provided with a rewritable phase change recording layer on a substrate. Grooves for guiding the focused light beam are concentrically or spirally formed on the substrate, and a user data area and a file management area are formed along the groove. The user data area represents address information and synchronization information. The groove shape is transformed by a signal and the groove shape is made constant in the file management area to suppress deterioration in the file management area where deterioration during repeated overwriting is a particular problem, and to improve disk reliability.
It is described that the durability is improved.
In the publication No. -11763, an identification signal is added to a header area in order to facilitate address management of sectors of an optical disc of single spiral land / groove format and to make format compatibility with a read-only optical disc easy. Address areas PID1 to 4
PIDs 1 and 2 are displaced from the track center of the groove sector to the outer circumference of the disk by half the track pitch, and PIDs 3 and 4 are displaced from the track center of the groove sector to the inner circumference of the disk by half the track pitch. The header area is shared by the groove sector and the inter-groove sector, and the address of the groove sector is stored in the PID 3 and 4 address areas, and the groove sector sector is stored in the PID 1 and 2 address areas. It is disclosed that the addresses of the sectors in the inter-groove portions adjacent to the outer circumference are incremented by 1 in the order in which the sectors are arranged on the recording spiral, and are numbered.
In 5969, a soft format device having a laser light source for soft format having a higher output than a laser light source used for an actual drive is used to soft-format an optical disc with high efficiency and to improve reliability of a format signal. A formatted optical disc (10) having a format signal (1
The mark property of 1) corresponds to the data signal (1
An optical disk having a mark property different from that of 2) is disclosed, and Japanese Patent Laid-Open No. 10-154334 discloses a servo information for tracking an optical disc having an information recording area and a format for the information recording area. And a recording film formed on a surface of the substrate on which the servo information and the format processing information are provided, and a substrate on which the format processing information is provided. It is described that, by recording ID information and performing formatting, there is no variation in the radial position with respect to the address information, the formatting start position is not affected by disturbance, etc., and a predetermined area of the disk is formatted securely. However, in these technologies, the signal recording of the portion for recording medium management information is performed in the data area. Not performed after completion of the signal recording.

Further, Japanese Patent Laid-Open No. 2000-11380 discloses a phase change type optical recording medium for performing a format process on an overwritable phase change type optical recording medium at high speed to reduce the time required for the process. It is described that the initial recording linear velocity for recording data in the unrecorded portion is set to be higher than the overwrite linear velocity for overwriting data, but this technique is suitable for amorphization. In order to reduce the time required for the high speed format processing of the phase change type optical recording medium that can be overwritten at the linear velocity, the signal recording of the portion for recording the medium management information is performed. It is not for improving the overwrite quality of the format of the information recording medium by performing after the signal recording in the area is completed.

Further, Japanese Patent Laid-Open No. 2000-353317 discloses a drive equipped with a CPU for controlling various drives such as an optical disk drive, a ROM for storing data such as a flash ROM, and an interface such as ATAPI and SCSI. Using an optical disk formatter consisting of a control substrate, a plurality of power calibrations are performed to obtain a plurality of recording powers, and an average recording power is calculated from the obtained plurality of recording powers. A value obtained by multiplying by a predetermined coefficient is used as the format recording power, and the format recording power is used to set the format recording power lower than the power recorded by the drive. Important data such as data It is described that the reliability of the recording signal is improved by recording several times and matching with the original data, and a large amount of high quality CD-RW discs are supplied. This is different from the present invention in that the plurality of recording powers are obtained and the average recording power is calculated from the obtained plurality of recording powers and the recording speed is changed.

Japanese Patent Laid-Open No. 2001-126265 discloses that
In the overwritable phase change type optical recording medium, in order to reduce the jitter and the error, the unformatted phase change type optical recording medium is formatted, and then the medium management information is recorded when the medium management information is recorded. It is described that recording is performed by overwriting at least twice. In JP-A-2001-148140, a rewritable area and a read-only area that maintain compatibility with a CD-RW are provided on one medium surface. In order to provide a rewritable compact disc, a RAM area 105 and a ROM area 104 are provided on the same disk surface, and a phase change recording layer is provided in both the RAM area and the ROM area. A groove is provided so that recording light can be irradiated to form an amorphous mark to record information. It is recorded, wavelength 770-79
Ratio of push-pull signal values before and after recording in the RAM area | I1-I2 | / | when measured using an optical pickup with 0 nm and an objective lens numerical aperture of 0.49 to 0.51
I1-I2 | a is 1.05 or more and 2.0 or less, or the ratio of the push-pull signal value after recording in the RAM area to the push-pull signal value in the ROM area | I1-I2 | a / | I1- I
2 | It is stated that the rewritable compact disc has a ROM of 0.78 or more and 1.3 or less.
The signal recording of the portion for recording the medium management information is not performed after the signal recording of the data area is completed.

[0008]

SUMMARY OF THE INVENTION The first object of the present invention is to improve the format of a phase change type information recording medium with good quality.
Moreover, it should be done at high speed. A second object is to provide conditions for efficiently producing the format of the phase change information recording medium. A third object is to provide a condition for producing a format in a phase change type information recording medium with a high yield in an apparatus for formatting. A fourth object is to provide an apparatus for easily and inexpensively producing a format of a phase change type information recording medium. A fifth object is to obtain a formatted phase change type information recording medium as described above.

[0009]

Means for Solving the Problems The above-mentioned problem is (1) a method of formatting a changeable optical information recording medium according to the present invention, wherein a recording speed and a data area of a portion for recording medium management information in a PMA area are set. Formatting method of phase-change optical information recording medium characterized by different recording speeds when recording; (2) “Phase-change optical information recording medium formatting method, which records medium management information A method of formatting a phase-change optical information recording medium, characterized in that the signal recording of the portion to be recorded is performed after the signal recording of the data area is completed. ”(3)“ Recording of medium management information after recording of the data area The method for formatting a phase change type optical information recording medium as described in the above item (2), wherein the operation of the unit for performing signal recording is stopped for 0.01 second or more and 2 seconds or less before performing the operation. (4) “After the recording of the data area, before the recording of the medium management information, a reset signal is transmitted to an apparatus that records the information at least once or more. Formatting method for phase change type optical information recording medium ";(5)" The device for recording the medium management information and the device for recording the data area are the same, (1) to () 4) A method for formatting a phase-change optical information recording medium according to any one of the items 4); (6) "After recording the data area, recording medium management information is performed at least 2 inside and outside by a radius value of the recording medium. In the case of performing recording at more than one place, the medium management information recording is performed from the outside first, which is achieved by the method for formatting a phase change type optical information recording medium according to the item (2).

Further, the above-mentioned problem is characterized by being created by using the formatting method described in any one of (7) "(1) to (6) of the present invention. It is achieved by "information recording medium".

The method of formatting the phase change type optical information recording medium according to the present invention will be described in detail below. Here, a case where the phase change type optical information recording medium is a CD-RW will be described as an example. FIG. 1 schematically shows a PMA area, an address data recording area, and a UDF data recording area in the case of a CD-RW to which the formatting method of the present invention is applied. CD-R
The format of W is the recording of address information on the entire surface and 1
The process is completed through two steps of disc information recording which is performed only at designated addresses of a part, but this time, a flow of performing address information recording first and then disc information recording was used. The drive used for recording the format signal has a maximum CD-RW recording speed of 4 times (CLV: 4.8).
m / sec), recording of address information was performed at a quadruple speed and completed in 19 minutes. After that, the disc information is recorded in the PMA area, and the UD for the packet writing application software "DirectCD" is further recorded.
F data was recorded on the inner and outer circumferences. The PMA data has a radius value of 22.3 mm, and the UDF data for "DirectCD" has an inner peripheral portion of 25.0 mm and an outer peripheral portion of 5 mm.
The recording radius values are 6.8 mm, which are far apart. The signal recording drive sets the signal recording speed in advance before starting signal recording on the disc, and in order to change it in the middle, it is necessary to send a reset signal to the drive, so leave it set at the beginning. The address information and the disc management information are recorded at the recording speed. Generally, the time required for formatting at quadruple speed is about 20 minutes and 20 seconds for address information recording of 19 minutes and disk management information recording of about 80 seconds.
When reading the address information and disk management information and verifying it, 10 times if the 8x read speed is used.
It takes less than a minute, and the formatting can be performed in a total of 30 minutes.

[0012]

EXAMPLES Examples of the present invention will be shown in the following four points. Example 1 The first address information recording in the CD-RW format was performed at a quadruple speed. After that, a reset signal was once sent to the drive to clear the signal recording speed information on the disc, and then the disc management information was recorded by newly setting the recording speed to double speed. It takes 160 seconds to record disc information at double speed, but the entire format time is
Compared to the case where all recording is performed at 4 times speed, the increase is slightly more than 1 minute, and the influence on the majority is small. 2 more
When disc information recording is performed at double speed, the effect of improving the quality of PMA signals, which are mostly used only for reading, is great.

FIG. 2 shows the results obtained by comparing the signals of the PitJitters of the PMA portion in the first and second embodiments and the case where only the recording power is changed with several drives. Similarly, the signal quality of the inner and outer UDF data is also improved.

Embodiment 2 The address information recording of the data recording portion starts from the inner circumference and is completed at the outer circumference. Since the next PMA information recording is the innermost circumference, the optical unit seeks from the outermost circumference to the innermost circumference and immediately starts signal recording. Normally, recording is started in a state where vibration after seek is not stable, so even if the recording speed is doubled, the jitter of the recording signal is a little bad. Therefore, when we waited 100 msec before recording PMA information,
As shown in FIG. 2, the PMA signal jitter was reduced.

Embodiment 3 In the case of the "DirectCD" format, the UDF data has an inner peripheral portion of 25.0 mm and an outer peripheral portion of 5 mm.
It is at 6.8 mm. Address information recording is completed in 57.0 mm, so immediately after recording UDF data on the outer circumference, record UDF data on the inner circumference, and finally P
By recording the MA data, the movement of the optical unit could be reduced from two round trips to one round trip. As a result, the entire format time can be shortened by about 3 seconds. Although the time reduction was not so great, it had a great effect on improving the durability of the unit and improving the quality of the recording signal.

Embodiment 4 In the case of the "FileCD" format, since the UDF data is only in the inner peripheral portion, the order of signal recording is: address information recording → inner circumference 25.0 mm UDF data recording → innermost circumference 2
The order of recording the PMA data of 2.3 mm can improve the quality of the recording signal.

[0017]

As is apparent from the detailed and specific description above, according to claim 1 of the present invention, the phase change type information recording medium can be formatted with high quality and at high speed. Further, according to the invention of claim 2, it is possible to obtain the condition for efficiently producing the format of the phase change type information recording medium. Further, according to the inventions of claims 3 and 4,
It was possible to obtain the conditions for producing the format with a good yield in the apparatus for formatting the phase change type information recording medium. Further, according to the invention of claim 5, it is possible to realize an apparatus for easily and inexpensively producing a format of a phase change type information recording medium. According to the invention of claim 6, the format of the phase change type information recording medium can be formatted with high quality and at high speed. According to the invention of claim 7,
A phase change type information recording medium formatted according to claims 1 to 6 could be obtained.

[Brief description of drawings]

FIG. 1 is a CD-to which a formatting method of the present invention is applied.
PMA area for RW, address data recording area, U
It is the figure which showed typically the DF data recording area.

FIG. 2 is a diagram showing changes in Pit Jitter when recording conditions are changed.

Claims (7)

[Claims] 1. A method of formatting a phase-change optical information recording medium, wherein the recording speed of a portion for recording medium management information in a PMA area and the recording speed in recording a data area are different. Method for formatting a phase change type optical information recording medium. 2. A phase change type optical information recording medium formatting method, wherein signal recording of a portion for recording medium management information is performed after completion of signal recording of a data area. Formatting recording medium. 3. The operation of the unit for performing signal recording is stopped for 0.01 second or more and within 2 seconds after recording the medium management information after recording the data area. The method for formatting the phase change type optical information recording medium according to [1]. 4. The phase change type device according to claim 2, wherein after the data area is recorded, a reset signal is transmitted to a device that records information at least once before recording medium management information. Formatting method for optical information recording medium. 5. The format of the phase change optical information recording medium according to claim 1, wherein the device for recording the medium management information and the device for recording the data area are the same. Method. 6. The recording of the medium management information after the recording of the data area is performed with at least two inside and outside of the radius value of the recording medium.
The method for formatting a phase change optical information recording medium according to claim 2, wherein the medium management information recording is performed from the outside first when the recording is performed at more than one place. 7. A phase change type information recording medium produced by using the formatting method according to any one of claims 1 to 6.