JP2004335101A - Optical information recording medium, optical information recording device, information processing device, optical information recording method, program, and storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To propose a specific optical format of address information which does not interfere with recording data.
SOLUTION: An optical disc 101 has a multi-layer structure of recording layers 102 and 103, and recording data can be recorded on each of the recording layers 102 and 103. Each of the recording layers 102 and 103 is provided with a spiral guide groove meandering in the radial direction of the optical disc 101. Recording data can be recorded on or between the guide grooves. ADIP 125 to 128, which are address information, are recorded as modulation of the guide groove meandering, and the address information indicates the radial position of the recording layer 102 or 103 on which the guide groove meandering is formed on the optical disc 101.
[Selection diagram] Fig. 1

Description

  The present invention relates to an optical information recording medium having a multi-layered recording layer and capable of recording recording data for each recording layer, an optical information recording apparatus for recording data on the optical information recording medium, an optical information recording, and an optical information recording. The present invention relates to an information processing apparatus provided with an apparatus, a program for causing a computer to cause an optical information recording apparatus to perform data recording, and a storage medium storing the program.

  In an optical disk such as a DVD, the total storage capacity can be increased by providing two or more recording layers. In such an optical disk, recording and reproduction can be performed by performing access from one side and focusing a light beam of an optical head (pickup) on each recording layer. Thereby, large-capacity recording and reproduction can be performed without turning over the optical disk. In particular, in the case of DVD, a read-only type (ROM) double-layer disc has already been put to practical use.

  Patent Literature 1 discloses an optical information recording medium having a multilayer structure including a first recording layer and a second recording layer, and has a plurality of tracks in a spiral or concentric shape, and the track includes a plurality of sectors. What is being disclosed is disclosed. Each sector has an address of 0 to (S-1) (S is the number of sectors of the first and second recording layers) in the first recording layer, and an address of S to (S × 2-1) in the second recording layer. Information (hereinafter simply referred to as “address”).

JP 2000-293947 A

Incidentally, in a recordable optical disk, it is necessary to embed an address in advance in order to specify the current position and the recording target position even in an unrecorded state.
In the technique of Patent Document 1, addresses are embedded in serial numbers starting from 0, where S is the number of sectors in the first recording layer, and the address of the second recording layer starts from S.

However, the technique of Patent Document 1 does not specifically disclose in what optical format the address is embedded in an unrecorded optical disc.
The optical format for embedding the address must be a format that does not interfere with the signal of the recording data after recording the recording data.

  When the number S of sectors in one recording layer differs depending on the optical disk (for example, when the storage capacity per layer differs depending on the optical disk due to the difference in the disk system or the number of tracks), the second layer Since it is not known where the address of the recording layer starts, there is also a problem that the position of the address in the radial direction of the optical disc cannot be calculated from only the address of the second recording layer.

  An object of the present invention is to propose a specific optical format of address information that does not interfere with recording data.

  Another object of the present invention is to enable address information of each recording layer to be easily obtained even if the storage capacities of the recording layers are different.

  According to the first aspect of the present invention, in an optical information recording medium having a multi-layered recording layer and capable of recording recording data for each recording layer, each recording layer is provided with a spiral guide groove meandering in a radial direction. Data can be recorded on or between the guide grooves, and address information is recorded as modulation of the meandering, and the address information indicates a position in the layer direction of the recording layer where the meandering is formed. An optical information recording medium characterized in that:

  Therefore, the address information can access an arbitrary position even when the recording data is not recorded, and the address information does not interfere with the recording data.

  According to a second aspect of the present invention, in the optical information recording medium according to the first aspect, the address information has a word length shorter than the data address after a predetermined conversion is performed on a data address of the recording data. Being expressed.

  Therefore, it is possible to cope with a low-density embedded format of address information, and it is also possible to suppress interference of the address information with recorded data.

  According to a third aspect of the present invention, there is provided an optical information recording apparatus for recording recording data on an optical information recording medium having a multi-layered recording layer and capable of recording recording data for each recording layer, Reading means for reading the meandering of the spiral guide groove meandering in the radial direction, and address information acquiring means for acquiring address information indicating a position in the layer direction of the recording layer where the meandering is formed as demodulation of the meandering Access means for accessing the recording layer using the address information; andrecording means for recording the recording data on or between the guide grooves at the accessed position. An optical information recording device that performs

  Therefore, the address information can access an arbitrary position even when the recording data is not recorded, and the address information does not interfere with the recording data.

  According to a fourth aspect of the present invention, in the optical information recording apparatus according to the third aspect, the demodulation demodulates a phase-modulated signal.

  Therefore, address information can be obtained by demodulating the phase-modulated signal.

  According to a fifth aspect of the present invention, in the optical information recording apparatus according to the third aspect, the demodulation is performed by demodulating a frequency-modulated signal.

  Therefore, the address information can be obtained by demodulating the frequency-modulated signal.

  According to a sixth aspect of the present invention, in the optical information recording apparatus according to the third aspect, the demodulation is performed by demodulating an amplitude-modulated signal.

  Therefore, the address information can be obtained by demodulating the amplitude-modulated signal.

  According to a seventh aspect of the present invention, there is provided an information processing apparatus capable of performing various types of information processing, comprising the optical information recording apparatus according to the third aspect.

  Therefore, the same operation and effect as those of the third aspect can be obtained.

  The invention according to claim 8 is an optical information recording method for recording recording data on an optical information recording medium in which the recording layer has a multi-layer structure and is capable of recording recording data for each recording layer. A reading step of reading the meandering of the spiral guide groove meandering in the radial direction, and address information obtaining of demodulating the meandering and obtaining address information indicating a position in the layer direction of the recording layer where the meandering is formed. And an access step of accessing the recording layer using the address information, and a recording step of recording the recording data on or between the guide grooves at the accessed position. This is an optical information recording method.

  Therefore, the address information can access an arbitrary position even when the recording data is not recorded, and the address information does not interfere with the recording data.

  According to a ninth aspect of the present invention, a computer controls an optical information recording apparatus that records recording data on an optical information recording medium that has a multi-layer recording layer and is capable of recording recording data for each recording layer. In the program, a reading process of reading the meandering spiral guide groove in the recording layer in the radial direction and demodulating the meandering to indicate a position in the layer direction of the recording layer where the meandering is formed. Address information acquisition processing for acquiring address information, access processing for accessing the recording layer using the address information, and recording processing for recording the recording data on or between the guide grooves at the accessed position. , Is executed by the optical information recording apparatus.

  Therefore, the address information can access an arbitrary position even when the recording data is not recorded, and the address information does not interfere with the recording data.

  According to a tenth aspect of the present invention, there is provided a storage medium storing the program according to the ninth aspect, in a storage medium storing the program.

  Therefore, the same operation and effect as those of the ninth aspect can be obtained.

  According to the first, third, and eighth aspects of the present invention, the address information can access an arbitrary position even when the recording data is not recorded, and the address information does not interfere with the recording data.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, address information can be obtained by demodulating a phase-modulated signal.

  According to a fifth aspect of the present invention, in the third aspect of the invention, address information can be obtained by demodulating a frequency-modulated signal.

  According to a sixth aspect of the present invention, the address information can be obtained by demodulating the amplitude-modulated signal in the third aspect of the invention.

  The invention according to claim 7 can provide the same operation and effect as the invention according to claim 3.

  According to the invention described in claim 8, the address information can access an arbitrary position even when the recording data is not recorded, and the address information does not interfere with the recording data.

  According to the ninth aspect of the present invention, the address information can access an arbitrary position even when the recording data is not recorded, and the address information does not interfere with the recording data.

  According to the tenth aspect, the same operation and effect as those of the ninth aspect can be obtained.

  An embodiment of the present invention will be described.

  In the following description, a description will be given using a suffix or symbol as exemplified below. That is, for example, in 12BDh, the suffix h indicates a hexadecimal number, and in this example, indicates the hexadecimal 12BD. In the example of 0010b, the suffix b indicates a binary number, and in this example, indicates the binary number 0010. In the example of 1234d, the suffix d indicates a decimal number, and in this example, indicates the decimal number 1234. “*” Indicates multiplication, and “/” indicates division.

  FIG. 1 is an explanatory diagram of a configuration of an optical disc 101 according to the present embodiment. The optical disc 101 implements the optical information recording medium of the present invention, and is a DVD (Digital Versatile Disc: digital versatile disc) in this example, and has a multi-layer recording layer, in this example, two layers. This is an optical disk on which data can be recorded on a layer.

  The lower recording layer 102 of the disc 100 is referred to as Layer 0, and the upper recording layer 103 is referred to as Layer 1. In general, the optical head of the optical information recording / reproducing apparatus irradiates a light beam from below, so that when viewed from the optical head side, Layer 0 is located on the near side and Layer 1 is located on the back side.

  As shown in FIG. 2, a guide groove (Groove) 106 is spirally cut from the inner circumference to the outer circumference of the disc 100 in Layer 0. Recording and reproduction of information are performed while the optical head traces on or between the guide grooves 106. The portion 105 between the guide grooves 106 is called a land.

  The guide groove 106 has a constant helical pitch (track pitch) as shown in FIG. 2, and furthermore, has a small amount, meandering sinusoidally in the radial direction of the optical disc 101. This meander is called wobble. The wobble amount is sufficiently smaller than the track pitch so as not to interfere with track tracking of the optical head or recorded data, for example, preferably about 5%. That is, if the track pitch 104 is 0.74 μm, the meandering width is about 0.03 μm. It is desirable that the wobble period 107 in the track direction be short, since the detection resolution is improved. However, if the recording data signal and the frequency region interfere with each other, the wobble cannot be detected. For example, about 5 μm is selected.

  By setting the wobble to have a constant period on a spatial basis on average, CLV (constant linear velocity) control can be performed by rotating the rotation motor of the optical information recording / reproducing apparatus in accordance with this frequency. Further, by generating a clock signal synchronized with the wobble, it can be used as a recording data clock.

  The wobble of the guide groove 106 is appropriately modulated, and by this modulation, address information and other auxiliary information can be embedded. Thus, any position on the optical disc 101 can be searched even before the recording, so that data can be recorded at any position.

  FIG. 3 shows an example of wobble modulation. The horizontal direction in FIG. 3 is the line direction, and the vertical direction is the radial direction. This is an example of phase modulation, and digital information can be embedded by treating the sine wave 111 having a 0-degree phase as “0” and the sine wave 112 having a 180-degree phase as “1”. As a modulation method, in addition to the phase modulation, frequency modulation or amplitude modulation may be used.

  Such embedding of address information by wobble modulation of the guide groove, or the embedded address information is called ADIP (ADdress In Pre-groove). FIG. 4 is an explanatory diagram showing an example of the relationship between ADIP that is this address information and the physical address number PSN (Physical Sector Number) of the recording data. In general, the recording density cannot be increased because ADIP needs to be made so as not to interfere with recording data. Therefore, the address is one number for several sectors of the PSN. In the example of FIG. 4, one ADIP address is represented by four sectors (PSN). Therefore, ADIP is represented by a word length smaller than the address of the recording data.

  In a DVD, an ECC (Error Correction Code) is added to recording data. Since this unit has a length of 16 physical sectors PSN, actual data recording is also performed in 16 PSN units. This is called an ECC block (16PSN).

FIG. 5 shows an example of the format of the address part of the recording data.
This is called a WID (Write sector ID). 24 bits (bit 0 to bit 23) are allocated to the PSN, and 1 bit is allocated as layer information (Layer Information) indicating whether the recording layer is Layer 0 or Layer 1 (“L” bit). Thus, PSN can be assigned to each of the two recording layers. However, Lbit is not essential in the format as shown in FIG. 1 (inverse spiral (described later)).

  FIG. 6 is an example of an address format of ADIP. This is called AID (ADIP ID). 22 bits (bit 0 to bit 21) are assigned to the ADIP address, and 1 bit is assigned as layer information (Layer Information) (“L” bit). Thus, an ADIP address can be assigned to each of the two recording layers. Also, Lbit is not essential in the format as shown in FIG. 1 (inverse spiral (described later)).

  As shown in FIG. 1, Layer 0 of the optical disc 101 is a reference layer serving as a reference for each layer, and the spiral of the guide groove (track) extends from the inner circumference to the outer circumference of the optical disc 101. The recording data address PSN of the data area starts from 030000h, and the outermost circumference is 26054Fh (reference numerals 121 and 122). The area inside from 030000h is a Lead-in area, in which dummy data other than user data and auxiliary data are recorded. The area outside 26054Fh is called a Middle area, and dummy data is recorded. The dummy data contains at least PSN. When the optical head accesses the user data area, the dummy data may transiently land outside the range due to a positioning error, disk eccentricity, or the like. It is provided in a range slightly wider than the data area.

  In the second layer (Layer 1) of the optical disc 101, the spiral of the guide groove (track) 103 is opposite to that of the Layer 0 and extends from the outer circumference to the inner circumference. This is called OTP (Opposite Track Path). If it is set to OTP, it is not necessary to move to the inner peripheral portion of the optical disc 101 once when performing continuous recording or reproduction like video data, recording and reproducing to the outermost periphery of Layer0, and then moving to Layer1 once. Better with minimal access time. Therefore, it is possible to prevent the video from being interrupted due to a long access time. In the OTP, during continuous (sequential) recording / reproduction, the track moves to the outermost circumference of Layer1 after the outermost circumference of Layer0, and thereafter the track is tracked toward the inner circumference of Layer1.

  It is assumed that the PSN of Layer 1 on the OTP optical disc 101 has been subjected to predetermined conversion, for example, bit inversion, to the PSN of Layer 0 at the same radial position. That is, at the position of PSN: 030000h of Layer 0 (reference numeral 121), Layer 1 becomes FCFFFFh (reference numeral 123). This means that when a negative number is represented by a two's complement number with bit 23 as a sign bit, -0300000h (minus 030000h) is FD0000h, so that there is only one difference. Therefore, bit inversion can be said to be almost sign inversion in two's complement representation.

  Layer 1 at the position of outer periphery PSN: 26054Fh of Layer 0 is D9FAB0 (reference numeral 124). Therefore, the PSN of the data area of Layer 1 increases from D9FAB0h to FCFFFFh.

  In the ADIP of Layer 0, Layer 0 starts with 00C000h (reference numeral 125). This is the value obtained by dividing PSN by 4. As described with reference to FIG. 4, four PSNs constitute one ADIP, and thus this is handled. Hereinafter, all ADIPs may be set to “PSN / 4”. The ADIP corresponding to the outermost PSN of Layer 0: 26054Fh (reference numeral 122) is 098153h (reference numeral 126). The ADIP corresponding to the outermost PSN of Layer1: D9FAB0h (reference numeral 124) is 367EACh (reference numeral 127), and the ADIP corresponding to the innermost PSN: FCFFFFh (reference numeral 123) is 3F3FFFh (reference numeral 128). . The ADIP corresponding to the outermost PSN of Layer 1: D9FAB0h (reference numeral 124) is 367EACh (reference numeral 127), which is also a value obtained by inverting the ADIP of Layer 0: 098153h (reference numeral 126). I have. Also, if bit 21 of ADIP is represented as a sign bit and expressed in 2's complement, then the value obtained by subtracting 1 from the negative number −0981553h of ADIP: 098153h (code 126) of Layer 0 is 367EACh (code 127), so that it is also different by 1 again. . Therefore, in terms of access operation, there is not much difference even if it is treated as sign inversion.

  In this way, the ADIP of Layer 1 of the OTP two-layer optical disc 101 is the bit inversion of the ADIP of Layer 0 at the same radial position (and may be the sign inversion). Further, all ADIPs are shorter by 2 bits than the word length of the recording data PSN, and have a relationship of “ADIP = PSN / 4 (2 bit right shift)”. Thus, ADIP and PSN can be easily derived from one another by dividing them by a predetermined transformation, here by 4 or multiplying by 4.

  Another configuration example of the optical disc 101 will be described with reference to FIG.

  Note that the same components as those of the optical disc 101 described with reference to FIGS. 1 to 6 will be described using the same reference numerals. Explaining mainly the differences from the optical disc 101 of FIGS. 1 to 6, the optical disc 101 of FIG. 7 is configured such that the spiral direction of the guide groove 106 of Layer 1 is the same as that of Layer 0. Such an optical disc 101 is called a PTP (Pararell Track Path). In addition, since the format of wobble and ADIP is the same as that of the above-described OTP optical disc 101, detailed description is omitted.

  In the PTP optical disk 101, the same PSN and ADIP (ADIP = PSN / 4) for both Layer 0 and Layer 1 at the same radial position of the optical disk 101. The area inside PSN: 030000h on the innermost circumference of the data area is called a Lead-in area, and the area outside the outermost area 26054Fh is called a Lead-out area, and the contents are auxiliary data and dummy data. The role of the dummy data is the same as the description of the OTP optical disk 101 described above.

  In the PTP optical disc 101, a Layer (L) bit is separately provided to determine the recording layer (see FIGS. 5 and 6). Thus, even in the optical disc 101 having a different recording capacity per recording layer, the recording layer can be easily determined by judging by looking at the L bit.

  Next, an optical information recording / reproducing apparatus 1 according to an embodiment of the present invention, which records and reproduces information on and from the optical disc 101, will be described.

  FIG. 8 is a block diagram showing a schematic configuration of the optical information recording / reproducing apparatus 1. As shown in FIG. 8, an optical information recording / reproducing apparatus 1 implements the optical information recording apparatus of the present invention, and records and reproduces information on and from the above-described optical disk 101 and other optical disks. This optical disk 101 can be replaced by a loading mechanism (not shown).

  The rotation motor 2 rotates the optical disc 101.

  The optical head 3 includes a laser diode (LD) which is a laser light source for recording and reproduction, an objective lens and other optical systems for forming a light spot by condensing a laser beam on the optical disc 101 and detecting the reflected light, A light-receiving element that converts the reflected light into an electric signal by a photoelectric converter divided into a plurality of parts, for moving the above-described objective lens in the focal direction and the radial direction to track the focal point and the guide groove of each recording layer of the optical disc 101. , And a head actuator for moving the entire optical head 3 in the radial direction of the optical disk 101, etc. (none of them are shown). Since these are well-known configurations, detailed description will be omitted.

  The LD driving unit 4 performs data recording by modulating the above-described LD mounted on the optical head 3 according to recording data.

  The actuator driving unit 5 drives the lens actuator and the head actuator to perform a focus and guide groove tracking servo operation by a well-known focus tracking and guide groove tracking unit (not shown). The lens actuator and the head actuator are driven so that the light spot of the optical head 3 is moved to a target position where the recording data is to be written (the radial position of the optical disk 101 and the recording layer).

  The data recording control unit 7 compares the target address where the recording data (Write Data) to be recorded is to be written with the position of the corresponding optical disc 101, and sends the recording data to the LD driving unit 4 if they match (see FIG. The detailed operation will be described later).

  The wobble detector 8 detects a meandering component of the guide groove 106 of the optical disc 101 from a signal of the light receiving element of the optical head 3. Specifically, at least two light receiving elements divided along the guide groove 106 respectively detect the first-order diffracted light of the reflected light of the light spot. The difference signal between the two light receiving elements is called a push-pull signal, which is a signal reflecting a wobble component. The output signal has, for example, a waveform as shown in FIG.

  The recording clock (Write Clock) generator 9 generates a clock signal that is phase-synchronized with the wobble signal. This is generally a PLL circuit that generates a multiplied clock of the wobble signal. Then, by supplying the recording data to the LD drive unit 4 based on the clock signal, the recording data can be written at a precise position on the optical disc 101.

  A CLV (Constant Linear Velocity) servo (Servo) unit 10 drives the rotary motor 2 with a rotary motor drive unit 11 according to the result of phase comparison between the wobble signal and a reference signal (not shown). Since the wobble of the guide groove 106 is carved on the optical disc 101 at a constant spatial frequency, the CLV control is realized by the rotation motor 2 rotating precisely in synchronization with the wobble signal.

  The ADIP decoding unit 12 demodulates a modulation component of the wobble signal to generate ADIP information. The ADIP information is decoded, for example, in a format as shown in FIGS. The detected ADIP information is output to the data recording control unit 7 and the access control unit 6 as the current address information of the optical disc 101.

  Then, the access control unit 6 compares the target address indicated by the recording data with the current address of the optical disc 101 detected by the ADIP decoding unit 12, and brings the light spot focused by the optical head 3 closer to the target address. Thus, the movement command is sent to the actuator driving unit 5.

  The CPU 13 centrally controls the entire optical information recording / reproducing apparatus 1 using the RAM 15 as a work area based on a control program or the like stored in the ROM 14.

  Next, the operation of the optical information recording / reproducing apparatus 1 will be described.

  FIG. 9 is a flowchart illustrating an operation of accessing the optical disk 101 performed by the access control unit 6 based on the control of the CPU 13. The processing in FIG. 9 implements an access means, an access step, and an access processing.

  First, the CPU 13 extracts, as Ntgt, a target address (PSN) of the position of the optical disc 101 where the recording data (Write data) is to be written (the suffix “tgt” stands for target. The same applies hereinafter). . Further, a recording layer (Layer) of the optical disc 101 as a target to which the recording data is to be written is extracted as Ltgt (step S1). The target address and recording layer may be instructed from a higher-level device (an information processing device 51 described later) separately from the recording data, or may be a format embedded in the recording data sequence itself. .

  Next, according to an instruction from the CPU 13, the access control unit 6 extracts the current address Ncur and the current recording layer Lcur captured by the optical head 3 from the ADIP data from the ADIP decoding unit 12 (step S2) (“ The suffix “cur” stands for current. The same applies to the following.)

  That is, the CPU 13 detects the meandering component of the guide groove 106 of the optical disk 101 from the signal of the light receiving element of the optical head 3 by the wobble detecting unit 8 (reading means, reading step, reading process), and modulates the phase of the meandering component. , Demodulates ADIP data modulated by frequency modulation, amplitude modulation or the like (address information acquisition means, address information acquisition step, address information acquisition processing).

  Here, Ncur is obtained by quadrupling the address indicated by the ADIP data. This is because, as described above, the ADIP address has a relationship of “PSN / 4”, and the units are aligned for comparison with the target PSN.

  When the optical disc 101 is OTP, the current recording layer Lcur is determined to be bit 0 of the ADIP address as a sign bit. If this bit is 0, it can be determined as Layer 0. In this case, “Lcur = 0”, and if bit 21 is 1, a negative number is used. Yes, it is determined to be Layer 1 and “Lcur = 1” is set. When the optical disc 101 is a PTP, another Layer bit is substituted for Lcur.

  Then, it is determined whether the target recording layer Ltgt is equal to the current recording layer Lcur (step S3). If they are equal (Y in step S3), the process proceeds to step S5. If they are not equal (N in step S3), the process proceeds to step S4.

  In step S4, the direction and number of jumps between the recording layers are determined based on the difference between Ltgt and Lcur, and a jump (focus jump (FocusJump)) between the recording layers is performed (step S4). For example, the direction in which the value of the difference between Ltgt and Lcur is positive and the layer number increases (the upward jump to the recording layer in the optical disc 101 of FIG. 1) is determined. In other words, if Ltgt is 1 and Lcur is 0, "Ltgt-Lcur = 1", so the jump is one recording layer upward. If "Ltgt = 0, Lcur = 1", "Ltgt-Lcur = Since this is -1 ", the jump is one recording layer downward. In the case where the number of recording layers is three or more, the direction and number of focus jumps can be determined in the same manner.

  The focus jump between the recording layers is specifically performed by driving the objective lens of the optical head 3 in the vertical direction to shift the focus to another recording layer. This point is well known and will be described in detail. Is omitted. When such a focus jump is performed (step S4), the processing after step S2 is repeated again. Thus, the focus jump is repeated until the current recording layer Lcur matches the target recording layer Ltgt. After exiting from the focus jump loop, the process proceeds to step S5.

  In step S5, first, it is determined whether the current address Ncur is a positive number. The sign is the most significant bit23. This corresponds to bit 21 of the original ADIP. When the optical disc 101 is OTP, the ADIP address is found to be in the reverse spiral of Layer 1 if it is a negative number, and to be the positive spiral in Layer 0 if it is a positive number. If the optical disc 101 is a PTP, both Layer 0 and Layer 1 are always positive and positive spiral. Therefore, in both OTP and PTP, if Ncur is a positive number, it can be determined as a positive spiral, and if Ncur is a negative number, it can be determined as a reverse spiral.

  In steps S6 and S7, an operation for converting the address to the track number T is performed. The track number is the number of the guide grooves 106, and is incremented by 1 for each round with the track located at PSN: 030000h being 0. In a disk having a constant linear density such as the CLV format, the number T of tracks in an arbitrary PSN can be calculated from the track pitch Tp and the length a of one sector. This is calculated by the following equation (1), for example.

T = sqrt ((PSN-030000h ) * a * Tp / pi + r0 2) / Tp
−r0 / Tp (1)
(However, a: physical sector length, r0: radius of the optical disk 101 when the PSN is located at 30,000h, sqrt (): square root, pi: pi)
In step S6, since it is a positive spiral, the track number where the target address Ntgt and the current address Ncur are located is calculated as it is in equation (1). The track number where Ntgt is located is Ttgt, and the track number where Ncur is located is Tcur.

  In step S7, since it is an inverse spiral, if the current address is inverted (or bit-inverted in the case of bit inversion) (conversion means, conversion step, conversion processing), it can be calculated in the same manner as the normal spiral. And the track number is calculated by equation (1). For the target address, it is desirable that the target position indication of the recording data is expressed in the same format. Similarly, the sign number is inverted (or the bit is inverted in the case of bit inversion) to obtain the track number.

  In step S8, the target track number Ttgt is compared with the current track number Tcur. If they match (Y in step S8), the current position is within the track circumference where the target sector is located, so that there is no need to move the optical disc 101 in the radial direction, and simply track the current track. Then, since it is only necessary to wait for the arrival of the target address, a series of access operations is terminated.

  If they do not match (N in step S8), it is again determined whether or not the current address Ncur is positive (step S9). If it is positive (Y in step S9), the process proceeds to step S10 because it is a positive spiral, and if it is negative (step S8). (N in S9) Since it is a reverse spiral, the process proceeds to step S11.

  In steps S10 and S11, the optical disk 101 is moved in the radial direction by the number of track number differences "Ttgt-Tcur". This is called track jump (TrackJump). The jump direction is, for example, positive in the outer circumferential direction of the optical disc 101.

  In step S10, since it is a positive spiral, when Ttgt is larger than Tcur, the jump should be made toward the outer periphery of the optical disc 101, and the track jump is performed by "Ttgt-Tcur". If “Ttgt> Tcur”, the result is positive, and the jump is directed toward the outer periphery.

  In step S11, since Ttgt is larger than Tcur, a jump should be made toward the inner circumference of the optical disc 101, and the track jump is performed by "Tcur-Ttgt". If “Ttgt> Tcur”, the result is negative, and the jump is directed inward.

  After such a track jump (steps S10 and S11), the process returns to step S2 to confirm the current address. This is because there is an error in the jump distance, and there is a case where the distance is gradually reduced by repetition. At the end of the access loop in this manner, the current position is located within one round before the target sector.

  FIG. 10 is a flowchart illustrating a recording operation of the data recording control unit 7 based on the control of the CPU 13. The processing in FIG. 10 implements a recording unit, a recording step, and a recording process.

  This processing starts when the access control unit 6 completes the access operation in FIG. First, the CPU 13 extracts, as Ntgt, an address (PSN) on the optical disc 101 that is a target on which recording data is to be recorded (step S21). The target address and the print data may be instructed from a higher-level device (an information processing device 51 described later) separately from the print data, or may be a format embedded in the print data sequence itself.

  Next, the current address Ncur of the optical head 3 is extracted from the ADIP data from the ADIP decoding unit 12 (step S22). Here, Ncur is obtained by quadrupling the ADIP address. As described above, since the ADIP address is “PSN / 4”, the units need to be aligned for comparison with the target PSN.

  Then, it is determined whether or not the current address Ncur matches the target address Ntgt (step S23). If they match (Y in step S23), the process proceeds to step S24, and if they do not match (N in step S23), the process returns to step S22 to detect the next ADIP address. By repeating the above processing, a loop is performed until the current address Ncur matches the target address Ntgt.

  Finally, when the current address Ncur matches the target address Ntgt (Y in step S23), the transmission of the recording data is started, and the LD driving unit 4 and the optical head 3 transmit the recording data to the optical disk 101. Recording is started (step S24).

  FIG. 11 shows the details of the optical information recording method executed by the optical information recording / reproducing apparatus 1 as described above with reference to FIGS. 9 and 10, but the outline thereof is organized with reference to the flowchart of FIG. explain. First, as shown in FIG. 11, the CPU 13 detects the meandering component of the guide groove 106 of the optical disk 101 from the signal of the light receiving element of the optical head 3 by the wobble detecting unit 8 (reading step) (step S31). The ADIP data modulated by the phase modulation or the like on the meandering component is demodulated (address information obtaining step) (step S32). The ADIP data of Layer 1 can be obtained by performing predetermined simple conversion such as bit inversion and sign inversion on the ADIP data at the same position in the radial direction of the optical disc 101 of Layer 0 (conversion step) (step S33). ).

  Using the ADIP data thus obtained, the optical head 3 accesses the predetermined position of the recording layer of the optical disk 101 by the processing of FIG. 9 (access step) (step S34). Then, by the processing of FIG. 10, the recording data is recorded on the recording layer at the accessed position (recording step) (step S35).

  FIG. 12 is a block diagram of the electrical connection of the information processing device 51 according to one embodiment of the present invention. As shown in FIG. 12, an information processing device 51 is configured by a computer such as a personal computer, performs various operations, and centrally controls each unit, and a memory 53 composed of various ROMs and RAMs. It is connected at 54.

  The bus 54 is provided with a magnetic storage device 55 such as a hard disk, an input device 56 such as a mouse and a keyboard, a display device 57 such as an LCD and a CRT, and a storage medium 58 such as an optical disk via a predetermined interface. Is connected to the optical information recording / reproducing apparatus 1 and a predetermined communication interface 61 for communicating with the network 60. The communication interface 61 can be connected to a WAN such as the Internet via the network 60. As the storage medium 58, various types of media such as optical disks such as CDs and DVDs, magneto-optical disks, and flexible disks can be used. As the storage medium reading device 59, specifically, an optical disk drive, a magneto-optical disk drive, a flexible disk drive, or the like is used according to the type of the storage medium 58. In addition, although the storage medium reading device 59 and the optical information recording / reproducing device 1 are separately illustrated, the storage medium reading device 59 may be configured as the same device as the optical information recording / reproducing device 1.

  In the description of the optical information recording / reproducing apparatus 1 described above, it is assumed that the processing of FIGS. 9 and 10 is executed under the control of the CPU 13. However, the processing of FIGS. 9 and 10 is stored in the magnetic storage device 55. It may be realized by the control executed by the information processing device 51 according to the control program executed.

  In this case, the control program stored in the magnetic storage device 55 executes the program of the present invention, and is read from the storage medium 58 that implements the storage medium of the present invention by the storage medium reading device 59, or It is installed in the magnetic storage device 55 by being downloaded from a WAN such as the Internet. With this installation, the information processing device 51 is in a state where it can operate for the above-described control. Note that this control program may operate on a predetermined OS. Further, it may be a part of specific application software.

FIG. 1 is an explanatory diagram of a configuration of a disk according to an embodiment of the present invention. FIG. 4 is an explanatory diagram of a configuration of a guide groove of a disk. It is explanatory drawing which shows an example of modulation | alteration of the wobble of a guide groove. FIG. 4 is an explanatory diagram illustrating an example of a relationship between ADIP and PSN. FIG. 4 is an explanatory diagram illustrating a format example of an address portion of recording data. FIG. 4 is an explanatory diagram showing an example of an ADIP address format. FIG. 6 is an explanatory diagram showing another configuration of the disk. FIG. 2 is a block diagram illustrating an overall configuration of an optical information recording / reproducing device. 6 is a flowchart illustrating an operation of accessing the disc by the optical information recording / reproducing device. 5 is a flowchart illustrating a recording operation of the optical information recording / reproducing apparatus on a disc. 1 is a flowchart of an optical information recording / reproducing method according to an embodiment of the present invention. FIG. 1 is a block diagram of an electrical connection of an information processing device according to an embodiment of the present invention.

Explanation of reference numerals

Reference Signs List 1 optical information recording device 51 information processing device 58 storage medium 101 optical information recording medium 102, 103 recording layer 106 guide groove 125 to 128 address information

Claims (10)

In an optical information recording medium in which a recording layer has a multilayer structure and can record recording data for each recording layer,
A spiral guide groove meandering in the radial direction is provided in each of the recording layers,
Data can be recorded on or between the guide grooves,
Address information is recorded as the modulation of the meander, the address information indicates the position in the layer direction of the recording layer where the meander is formed,
An optical information recording medium characterized by the above-mentioned.   2. The optical information recording medium according to claim 1, wherein said address information is expressed by a word length shorter than said data address by performing a predetermined conversion on a data address of said recording data. In an optical information recording apparatus for recording recording data on an optical information recording medium having a multi-layered recording layer and capable of recording recording data for each recording layer, a spiral guide meandering in each of the recording layers in a radial direction. Reading means for reading the meandering of the groove;
Address information acquisition means for acquiring address information indicating a position in the layer direction of the recording layer in which the meandering is formed as demodulation of the meandering;
Access means for accessing the recording layer using the address information;
Recording means for recording the recording data on or between the guide grooves at the accessed position,
An optical information recording device comprising:   4. The optical information recording apparatus according to claim 3, wherein the demodulation demodulates a phase-modulated signal.   4. The optical information recording apparatus according to claim 3, wherein the demodulation demodulates a frequency-modulated signal.   4. The optical information recording apparatus according to claim 3, wherein the demodulation demodulates an amplitude-modulated signal.   An information processing device capable of performing various types of information processing, comprising the optical information recording device according to claim 3. In an optical information recording method for recording recording data on an optical information recording medium capable of recording recording data for each recording layer in a recording layer having a multilayer structure,
A reading step of reading the meandering of the spiral guide groove meandering in the radial direction in each of the recording layers;
An address information acquiring step of demodulating the meandering and acquiring address information indicating a position in a layer direction of the recording layer in which the meandering is formed;
An access step of accessing the recording layer using the address information;
A recording step of recording the recording data on or between the guide grooves at the accessed position,
An optical information recording method, comprising: In a program that causes a computer to execute control of an optical information recording apparatus that performs recording of recording data on an optical information recording medium capable of recording recording data for each recording layer in a recording layer having a multilayer structure,
A reading process for reading the meandering of the spiral guide grooves meandering in the radial direction in the respective recording layers;
Address information acquiring processing for demodulating this meandering and acquiring address information indicating a position in the layer direction of the recording layer where the meandering is formed;
An access process for accessing the recording layer using the address information;
A recording process of recording the recording data on or between the guide grooves at the accessed position;
And causing the optical information recording device to execute the program. In the storage medium storing the program,
A storage medium storing the program according to claim 9.

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