JP4025252B2 - Information recording apparatus and information recording method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an information recording medium such as a DVD-R or a DVD-RW, an information recording apparatus using the information recording medium, and an information recording method.
[0002]
[Prior art]
As is well known, in recent years, information recording capable of recording and reproducing data, such as DVD (Digital Versatile Disk) -R (Recordable), DVD-RW (ReWritable), DVD-RAM (Random Access Memory), etc. A medium (optical disk) has been developed and put into practical use.
[0003]
Along with this, an information recording apparatus capable of recording data on an optical disc and reproducing data recorded on an optical disc has been developed. For example, a recording apparatus and method for recording data at high speed are disclosed (for example, see Patent Document 1).
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-214457
[Problems to be solved by the invention]
Conventionally, the recording linear velocity for DVD-R, DVD-RW, etc. is 3.49m / s and is defined by the standard. Recently, the linear velocity has been increased as an optional high linear velocity, such as twice or four times the standard linear velocity. An information recording medium capable of recording the information and an information recording apparatus for recording / reproducing information on the information recording medium have been proposed.
[0006]
In the conventional DVD-R and DVD-RW, a trial recording area (PCA: Power Calibration Area) and a recording management area (RMA: Recording Management Area) are provided only on the inner periphery of the disk, and are 8 times, 16 times, etc. In order to cope with the high linear velocity, high-speed rotation of the disk is required, and stable rotation is difficult. Thus, recording at a higher linear velocity has not been assumed.
[0007]
Accordingly, the present invention has been made to solve the above-described problem, and in order to enable high-speed recording on a DVD-R, DVD-RW, etc., a test recording area is provided not only on the inner periphery but also on the outer periphery of the optical disc. It is an object of the present invention to provide an information recording medium, an information recording apparatus, and an information recording method characterized in that a PCA and a recording management area (RMA) are provided and the PCA and RMA used according to the recording speed are properly used.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides an inner peripheral side reference information area in which optimum recording conditions at the time of recording are set on the inner peripheral side of the lead-in area of the disc, and an outer peripheral side of the lead-out area of the disc. And an outer peripheral side reference information area in which optimum recording conditions at the time of recording are set.
[0009]
According to the above configuration, PCA recording corresponding to high-speed recording and recording information management thereof can be performed.
In order to achieve the above object, the present invention provides an inner peripheral side reference information area and an outer peripheral side reference in which optimum recording conditions at the time of recording are set on the inner peripheral side of the lead-in area and the outer peripheral side of the lead-out area. In an information recording apparatus for recording / reproducing data on / from an information recording medium provided with an information area, determination means for determining whether or not a preset recording speed is a predetermined recording speed, and the recording speed is predetermined by the determination means If it is determined that the recording speed is equal to or higher than the recording speed, an optimum recording condition for recording is set in the outer peripheral side reference information area. If it is determined that the recording speed is lower than the predetermined recording speed, the inner peripheral side reference information area is set. And setting means for setting optimum recording conditions at the time of recording.
[0010]
According to the above configuration, PCA and RMA to be used can be properly used according to the recording speed, and it is not necessary to change the rotation speed of the spindle motor, and the recording time can be shortened.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing a DVD-RW disc. Here, a single-layer DVD-RW is shown.
As shown in FIG. 1, a DVD-RW 100 has a central hole 1 attached to a spindle motor, a clamping area 3 supported by a clamper, a recording layer 5 for recording information, and upper and lower portions of the recording layer 5. An adhesive layer 9 is provided, which is provided and adheres the recording layer 5 and the substrate 7.
[0012]
FIG. 2 is a diagram showing a physical format structure of the entire DVD-RW disc. FIG. 3 is a diagram showing a basic form of the physical format structure of the lead-in area 18 of the DVD-RW. As shown in FIG. 2, in the DVD-RW, the inner R-Information (inner circumference R information) area 12, lead-in area 18, user data area 19, lead-out area 20, Outer R-Information are arranged from the inner circumference side of the disc. (Peripheral side R information) area 13 is formed.
[0013]
The inner circumference R information area 12 is an area used in a DVD-RW recorder, and includes a first power calibration area (power calibration area: PCA) 14 used for recording power calibration, and recording conditions. It comprises a first recording management area (RMA) 16 to be managed. That is, when recording is started, trial recording is performed on the PCA, optimum recording conditions such as the intensity of laser light are found, and the recording conditions are recorded in the RMA. The first linking loss areas 15 and 17 are provided in the area next to the PCA 14 and the area next to the RMA 17, and the size of the first linking loss areas 15 and 17 is a minimum capacity capable of error correction. One ECC block is used. That is, the first linking loss areas 15 and 17 become introduction areas for error correction, and accurate data can be recorded or reproduced when moving to the next area. The inner circumference R information area 12 is an area used exclusively by a recording device, and is not used by a reproduction-only device such as a DVD player or a drive.
[0014]
Next, as shown in FIG. 3, the lead-in area 18 includes an initial area 25, a system reserved area 26, a buffer area 0, RW-Physical format information (RW-Physical format information) from the inner periphery side of the disk. An RW physical format information) area 27, a reference code area 28, a buffer area 1, a control data area 29, and a buffer area 2. The RW physical format information is version information of DVD-R or DVD-RW. For example, in the case of DVD-R, version 2.0 revision version 1.0 standard (hereinafter referred to as V2.0 R V1.0) In the case of DVD-RW, version 1.1 revision version 1.0 standard (hereinafter referred to as V1.1 R V1.0) is recorded in advance. Therefore, when recording, it is possible to easily determine whether the disc is set in the present invention by determining the land pre-pits in the lead-in area 18 when the disc is loaded. .
[0015]
An NBCA is optionally secured at a predetermined radial position in the initial area 25, and first identification information (for example, a serial number of the disk) can be recorded therein. Next, the control data area 29 is configured by unreadable embossing. This is because the control data area 29 in which the disc management information is recorded is formed by embossing in order to prevent the information on the DVD-ROM from being illegally copied to the DVD-RW so that it cannot be overwritten. Since the groove of the DVD-RW is formed with a shallow groove, if the emboss pits are formed with the same groove depth, sufficient signal amplitude cannot be obtained, and unreadable (unreadable) embossing can be achieved. The lead-in area other than the control data area is formed of a groove capable of data recording, and necessary data is recorded in the lead-in area when the user records information on the disc.
[0016]
Returning to FIG. 2, the user data area 19 is an area for recording user data, and 0 data is recorded in the lead-out area 20 after formatting. Note that the area from the lead-in area 18 to the lead-out area 20 is an area (information area) accessed by a reproduction-only device (a reproduction apparatus used by the user).
[0017]
The outer peripheral R information area 13 includes a second linking loss area 21, a second RMA 22, a second linking loss area 23, and a second PCA 24. The second linking loss areas 21 and 23 play the same role as the first linking loss areas 15 and 17 and serve as introduction areas for error correction. When the next area is moved to, the accurate data is recorded or reproduced. This is an area that can be used. In the second RMA 22, management of address information of the PCA 24 used in the trial recording and management information of the recording conditions of the drive at that time are recorded. The second PCA 24 is a test recording area and is used for calibrating the recording power in the same manner as the first PCA 14.
[0018]
As described above, the present invention provides a DVD-RW characterized in that the PCA 24 and the RMA 22 are provided not only on the inner periphery but also on the outer periphery of the disc in order to enable further high-speed recording. In addition, since the two RMAs 16 and 22 provided on the inner and outer circumferences can manage the two PCAs 14 and 24 on the inner and outer circumferences, an information recording apparatus capable of managing information recording according to the recording speed is provided. To do. Here, DVD-RW is taken as an example, but DVD-R is also applicable.
[0019]
Next, an information recording apparatus that records information in accordance with the recording speed when a DVD-RW provided with PCA and RMA on the outer periphery and the outer periphery is loaded will be described.
FIG. 4 is a block diagram showing the configuration of the information recording apparatus of the present invention. The following description is an embodiment of the present invention and does not limit the apparatus and method of the present invention. The information recording medium (optical disk) 61 is an optical disk capable of recording user data or a read-only optical disk. In the present embodiment, the present invention will be described as a recordable optical disk. Examples of recordable optical disks include optical disks such as DVD-R and DVD-RW.
[0020]
A land track and a groove track are spirally formed on the surface of the optical disc 61, and the disc 61 is driven to rotate by a spindle motor 63.
[0021]
Information recording and reproduction with respect to the optical disc 61 is performed by the optical pickup 65. The optical pickup 65 is connected to a thread motor 66 through a gear, and the thread motor 66 is controlled by a thread motor control circuit 68.
[0022]
A speed detection circuit 69 is connected to the thread motor control circuit 68, and a speed signal of the optical pickup 65 detected by the speed detection circuit 69 is sent to the thread motor control circuit 68. A permanent magnet (not shown) is provided at a fixed portion of the thread motor 66, and the optical pickup 65 moves in the radial direction of the optical disk 61 when the drive coil 67 is excited by the thread motor control circuit 68.
[0023]
The optical pickup 65 is provided with an objective lens 70 supported by a wire or a leaf spring (not shown). The objective lens 70 can be moved in the focusing direction (the optical axis direction of the lens) by driving the driving coil 72, and can be moved in the tracking direction (the direction orthogonal to the optical axis of the lens) by driving the driving coil 71. It is.
[0024]
The motor control circuit 64 can perform rotation control at a constant linear velocity at the time of recording or reproducing a signal on the optical disc 61, and can also perform rotation control at a constant angular velocity. Further, the rotation speed of the spindle motor 63 is grasped and the speed is transmitted to the CPU 90.
[0025]
The modulation circuit 73 modulates user data supplied from the host device 94 via the interface circuit 93 when information is recorded, and provides the modulated data. The laser control circuit 75 provides a write signal to the semiconductor laser diode 79 based on the modulation data supplied from the modulation circuit 73 during information recording (mark formation). The laser control circuit 75 provides a read signal smaller than the write signal to the semiconductor laser diode 79 when reading information.
[0026]
The semiconductor laser diode 79 generates laser light in accordance with a signal supplied from the laser control circuit 75. Laser light emitted from the semiconductor laser diode 79 is irradiated onto the optical disc 61 through the collimator lens 80, the half prism 81, and the objective lens 70. The reflected light from the optical disk 61 is guided to the photodetector 84 via the objective lens 70, the half prism 81, the condenser lens 82, and the cylindrical lens 83.
[0027]
The photodetector 84 is composed of four divided photodetector cells 84a to 84d. Output signals of the photodetection cells 84a to 84d are supplied to the differential amplifiers OP1 and OP2 via the current / voltage conversion amplifiers 85a to 85d and the adders 86a to 86d.
[0028]
The differential amplifier OP2 outputs a focus error signal FE corresponding to the difference between both output signals of the adders 86a and 86b. This output is supplied to a focusing control circuit 87. The output signal of the focusing control circuit 87 is supplied to the focusing drive coil 72. As a result, the laser beam is controlled to be always just focused on the recording film of the optical disc 61.
[0029]
The differential amplifier OP1 outputs a tracking error signal TE corresponding to the difference between both output signals of the adders 86c and 86d. This output is supplied to the tracking control circuit 88. The tracking control circuit 88 generates a track driving signal according to the tracking error signal from the differential amplifier OP1. The track drive signal output from the tracking control circuit 88 is supplied to the drive coil 71 in the tracking direction. A tracking error signal used in the tracking control circuit 88 is supplied to the sled motor control circuit 68.
[0030]
By performing the focusing control and the tracking control, the output of the adder 86e that adds the output signals of the adders 86c and 86d to the sum signal of the output signals of the photodetection cells 84a to 84d of the photodetector 84 is added. The sum signal RF reflects a change in reflectance from a pit or the like formed on a track of the optical disc 61 corresponding to the recording information. This signal is supplied to the data reproduction circuit 78.
[0031]
The data reproduction circuit 78 reproduces recorded data based on the reproduction clock signal from the PLL circuit 76. The data reproduction circuit 78 has a function of measuring the amplitude of the signal RF, and the measured value is read by the CPU 90.
[0032]
When the objective lens 70 is controlled by the tracking control circuit 88, the sled motor 66, that is, the optical pickup 65 is controlled by the sled motor control circuit 68 so that the objective lens 70 is positioned near the center position in the optical pickup 65. .
[0033]
The motor control circuit 64, the thread motor control circuit 68, the modulation circuit 73, the laser control circuit 75, the PLL circuit 76, the data reproduction circuit 78, the focusing control circuit 87, the tracking control circuit 88 and the like are included in one LSI chip as a servo control circuit. These circuits are controlled by the CPU 90 via the bus 89. The CPU 90 comprehensively controls the information recording device 150 in accordance with an operation command provided from the host device 94 via the interface circuit 93. The CPU 90 uses the RAM 91 as a work area and performs a predetermined operation according to a program including the present invention recorded in the ROM 92.
[0034]
FIG. 5 is a flowchart showing an operation example when the information recording apparatus according to the present invention performs the recording operation.
When the optical disk is inserted, the CPU 90 moves the optical pickup 65 to the lead-in area, and reads the land pre-pit information described above from the lead-in area 18 (step SA1). Then, the media type is determined from the pre-pit information (step SA3), and if it is rerecordable, the content of the version information is determined (step SA5). If the inserted disc is, for example, a DVD-RW, it is determined whether the version information is a version of version 1.1 Revision version 1.0 standard (V1.1 R V1.0 standard) or lower. In the case of a DVD-R, it is determined whether the version is a version 2.0 Revision version 1.0 standard (V2.0 R V1.0 standard) or lower. If it is determined that the version information is a version equal to or lower than the (V1.1 R V1.0 standard), the CPU 90 acquires the recording speed determined by the host device 94 (SA16). That is, the recording speed selected by the user is acquired. It is determined whether or not the acquired recording speed is 4 × speed or more. If the recording speed is 4 × speed or more (Y in step SA17), rotation control becomes difficult on the inner peripheral side, and recording becomes impossible. If the speed is lower than the quadruple speed (Y in step SA17), the process proceeds to step SA21.
[0035]
Returning to step SA5, if it is determined that the version information is a version higher than the V1.1 R V1.0 standard, the CPU 90 acquires the recording speed selected by the user (step SA7). It is determined whether or not the acquired recording speed is 4 × speed or more. If the recording speed is 4 × speed or more (Y in Step SA9), the CPU 90 moves the optical pickup 65 to the outer peripheral R information area 13 and writes a test writing to the PCA 24. The optimum recording condition for the intensity of the laser beam is found, and the recording condition is recorded in the RMA 22 (steps SA11, 13, 15). If the speed is lower than the quadruple speed (N in Step SA9), the CPU moves the optical pickup 65 to the inner peripheral R information area 12 to cause the PCA 14 to perform test writing, and the optimum recording condition for the intensity of the laser light. And the recording conditions are recorded in the RMA 16 (steps SA21, 23, 25).
[0036]
The CPU 90 records user data in the user data area 19 based on the conditions recorded in the PCA 24, RMA 22, and PCA 14, RMA 16.
In this way, by determining the media type and version information of the inserted optical disk, it is understood that the PCA 24 and RMA 22 are provided not only on the inner circumference but also on the outer circumference of the disk, and the inner circumference according to the recording speed. PCA 14 and RMA 16 on the side, or PCA 24 and RMA 22 on the outer peripheral side can be used properly. Therefore, information recording can be managed without changing the rotation speed of the spindle motor 63 of the information recording apparatus.
[0037]
Furthermore, as another embodiment, FIG. 6 shows an operation example when the information recording apparatus records. Note that the processing from step SB1 to step SB5 in FIG. 6 is the same as the processing from step SA1 to step SA5 in FIG.
[0038]
If it is determined in step SB5 that the version information is V1.1 R V1.0 or less, the CPU 90 determines from which position in the user data area 19 to start recording (step SB7), and proceeds to step SB19.
[0039]
If it is determined that the version information is version information higher than V1.1 R V1.0, the CPU 90 determines from which position in the user data area 19 to start recording (step SB9). Then, it is determined whether the inner peripheral side or the outer peripheral side with the middle of the radial position of the disk as a boundary (step SB11). If it is determined that the recording start position is on the outer peripheral side, the CPU 90 controls the motor control circuit 64 to rotate the spindle motor 63 at a high speed (step SB12). After rotating at a high speed, the CPU 90 moves the optical pickup 65 to the outer peripheral side R information area 13, causes the PCA 24 to perform test writing, and records optimum recording conditions in the RMA 22 (steps SB13, 15, and 17). On the other hand, if it is determined that there is a recording start position on the inner circumference side, the CPU 90 controls the motor control circuit 64 to rotate the spindle motor 63 at a low speed (step SB18). After rotating at a low speed, the CPU 90 moves the optical pickup 65 to the inner circumference R information area 12, causes the PCA 14 to perform test writing, and records optimum recording conditions in the RMA 16 (steps SB19, 21, 23). After these processes are completed, the CPU 90 records user data in the user data area 19 (step SB25).
[0040]
In this way, the inner radius side and the outer circumference side are separated with the middle of the radial position of the disc as a boundary, and it is determined whether the user data is recorded on the inner circumference side or the outer circumference side. Recording is performed at a low recording speed on the inner peripheral side, and recording is performed at a high recording speed on the outer peripheral side. Further, the PCA 14 and RMA 16 on the inner circumference can be used for recording on the inner circumference side, and the PCA 24 and RMA 22 on the outer circumference can be used on the outer circumference side. Although the case where the area is divided into two areas has been described, the present invention is not limited to two, but is divided into three or more areas, and the inner peripheral side PCA 14 and RMA 16 and the outer peripheral side PCA 24 and RMA 22 used according to the recording area are used. It is also possible.
[0041]
In addition, this invention is not limited to the said embodiment, In the implementation stage, it can change variously in the range which does not deviate from the summary.
[0042]
【The invention's effect】
As described above, in order to enable recording at a high linear velocity such as 4 times or 8 times the standard linear velocity in DVD-R or DVD-RW, for example, the PCA is not only on the inner circumference but also on the outer circumference. By providing the RMA, the two PCAs provided on the inner periphery and the outer periphery can be managed, respectively, and can be used properly according to the recording speed.
[0043]
By using the above information recording medium, user data can be recorded without changing the rotation speed of the spindle motor even at high speed recording.
Further, recording can be performed at a low recording speed on the inner circumference side at a predetermined radial position of the disk, and can be recorded at a high recording speed on the outer circumference side.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a DVD-RW disc.
FIG. 2 is a diagram showing a physical format structure of the entire DVD-RW disc.
FIG. 3 is a diagram showing a basic form of a physical format structure of a lead-in area 18 of a DVD-RW.
FIG. 4 is a block diagram showing a configuration of an information recording apparatus of the present invention.
FIG. 5 is a flowchart showing an operation example when the information recording apparatus according to the present invention performs a recording operation.
FIG. 6 is a flowchart showing an operation example when an information recording apparatus according to another embodiment of the present invention performs a recording operation.
[Explanation of symbols]
63 Spindle motor 64 Motor control circuit 65 Optical pickup 90 CPU

Claims (3)

Data is recorded / reproduced on / from an information recording medium having an inner circumference side reference information area and an outer circumference side reference information area in which optimum recording conditions are set on the inner circumference side of the lead-in area and the outer circumference side of the lead-out area. In the information recording device,
Determining means for determining whether or not the preset recording speed is a predetermined recording speed;
When it is determined by the determination means that the recording speed is equal to or higher than a predetermined recording speed, an optimum recording condition at the time of recording is set in the outer peripheral side reference information area, and it is determined that the recording speed is lower than the predetermined recording speed An information recording apparatus comprising: setting means for setting an optimum recording condition at the time of recording in the inner peripheral side reference information area. Data is recorded / reproduced on / from an information recording medium having an inner circumference side reference information area and an outer circumference side reference information area in which optimum recording conditions are set on the inner circumference side of the lead-in area and the outer circumference side of the lead-out area. In the information recording method,
A determination step of determining whether or not the preset recording speed is a predetermined recording speed;
When it is determined in this determination step that the recording speed is equal to or higher than a predetermined recording speed, an optimum recording condition at the time of recording is set in the outer peripheral side reference information area, and it is determined that the recording speed is lower than the predetermined recording speed And a setting step for setting an optimum recording condition at the time of recording in the inner peripheral side reference information area. 3. The information recording method according to claim 2 , wherein the determination step considers that the predetermined recording speed is quadruple speed and determines whether the preset recording speed is quadruple speed or more.

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