KR100805177B1 - Information recording medium, information recording device, and information recording method - Google Patents

Abstract

According to one embodiment, the single-sided multilayer information recording medium has a recording layer, wherein an embossed management zone, an internal recordable management zone, a data area, and an external recordable management zone are arranged in order from inside each of the recording layers, The burst-cutting area is arranged inside the relief management zone of any one of the recording layers.

Information recording medium, information recording apparatus, information recording method

Description

Information recording media, information recording devices, and information recording methods {INFORMATION RECORDING MEDIUM, INFORMATION RECORDING DEVICE, AND INFORMATION RECORDING METHOD}

1 is an exemplary block diagram of an information recording / reproducing system according to an embodiment of the present invention.

2 is an exemplary block diagram of an information recording / reproducing system according to another embodiment of the present invention.

3 is an exemplary block diagram of an optical disk apparatus according to another embodiment of the present invention.

4 is an exemplary pattern diagram of a dual-layer optical disc having two information recording / reproducing layers according to another embodiment of the present invention.

5 is an exemplary diagram showing physical specifications of an embossed area and a rewritable recording area of the optical disc of the embodiment of the present invention.

6 is an exemplary diagram showing a cross-sectional structure of each layer of the optical disc.

7A and 7B are exemplary views showing the layout of each layer of the optical disc.

8A and 8B are exemplary diagrams for explaining the interlayer crosstalk of the optical disc.

9 is an exemplary graph showing a change in an optimum value of the recording power of layer 1 in accordance with the recording state of layer 0. FIG.

FIG. 10 is an exemplary diagram showing clearance set in the data area to prevent signal offset caused by interlayer crosstalk.

11 is an exemplary view showing the details of the layout on the inner circumference of the optical disc.

12 is an exemplary view showing the details of the layout on the outer periphery of the optical disc.

13 is an exemplary diagram illustrating an example of information recorded in a BCA area.

14 is a BCD recording format of a disc.

FIG. 15 is an exemplary diagram showing details of a book type and a disc type of a BCA recording.

16 is an exemplary diagram showing details of an extended disc type of BCA recording.

17 is an exemplary diagram showing details of another example of a book type and a disc type of a BCA recording.

18 exemplarily shows the content of the physical format information of the relief area formed on the layer 0. FIG.

19 exemplarily shows detailed contents of data area allocation.

20 exemplarily shows physical format information of a recordable management zone.

21 exemplarily shows the contents of the data area allocation in the physical format information of the recordable management zone.

22 exemplarily shows details of a starting physical sector number of a border zone in physical format information of a recordable management zone.

23 is an exemplary diagram showing details of a management zone.

24 exemplarily shows contents of a unique ID field.

25 exemplarily shows a configuration of recording management data.

FIG. 26 exemplarily shows RMD information of field 0. FIG.

27 is an exemplary detail view of a disk state in recording management data.

28 exemplarily shows details of data area allocation in recording management data.

29 exemplarily shows contents of resumed data area allocation.

30 illustratively shows the contents of a drive test zone assignment.

31A and 31B exemplarily show RMD information of field 1. FIG.

32 exemplarily shows RMD information of field 3. FIG.

33A exemplarily shows RMD information of field 4. FIG.

33B exemplarily shows RMD information of fields 5, 6, ..., 21. FIG.

34A, 34B, 34C, 34D, 34E, and 34F are exemplary diagrams showing the recording state of the data area.

35A is an exemplary diagram illustrating the configuration of border-out and border-in regions.

35B is an exemplary diagram showing the size of the out of bounds region.

36 is an exemplary diagram showing the range of the inner periphery where signals are recorded in formatting.

37 is an exemplary diagram showing the range of the inner periphery where signals are recorded in formatting.

FIG. 38 is an exemplary diagram showing a change in area when the recordable maximum physical sector number of layer 0 is changed when the guard zone is shifted. FIG.

FIG. 39 is an exemplary diagram showing a change in area when the recordable maximum physical sector number of layer 0 is changed when a new guard zone is created. FIG.

40 exemplarily shows the size of a typical guard zone.

41A and 41B are exemplary views showing the procedure of recording example 1. FIG.

42A and 42B are exemplary views showing the procedure of recording example 2. FIG.

43A and 43B are exemplary views showing the procedure of recording example 3. FIG.

44A and 44B are exemplary diagrams showing the relationship between the open R zone of the layer 0 and the recordable area to explain the write prohibition.

45 exemplarily shows the number of sector “A” required to ensure the spacing.

46 is an exemplary diagram showing a procedure of Recording Example 4. FIG.

47A, 47B, and 47C are exemplary diagrams showing the state of the disc without data on layer 1;

48A and 48B are exemplary diagrams showing the state of a disk completed with data on layer 1;

49 is an exemplary diagram for explaining the expansion of the recording management zone in the bordered area.

50 is an exemplary diagram for explaining the expansion of the recording management zone on the outer periphery.

51 is an exemplary view showing a detailed layout on an inner circumference of an optical disc according to another embodiment.

52 is an exemplary view showing a detailed layout on an inner circumference of an optical disc according to another embodiment.

53 is an exemplary diagram showing a detailed layout on an outer circumference of an optical disc according to another embodiment.

54 is an exemplary view showing a configuration of an optical disc player according to another embodiment of the present invention.

55A and 55B are exemplary diagrams illustrating a playback operation performed by a player according to the embodiment of the present invention of FIG. 54.

<Description of the symbols for the main parts of the drawings>

10 optical disc 12 optical disc device

14: host device 18: host PC

22 optical head 24 photodetector

26: preamplifier 28: servo circuit

30: RF signal processing circuit 32: address signal processing circuit

34 controller 36 write signal processing circuit

38: LD drive circuit

One embodiment of the present invention relates to an information recording medium having a plurality of recording layers formed on one side, an information recording apparatus using the information recording medium, and an information recording method.

As a recording medium on which a large amount of information such as a video signal can be recorded, a digital versatile disc (DVD) is popularized. A movie about two hours long is recorded on a DVD, and the information is reproduced by playing back the device to allow free viewing at home. Recently, the digitization of television broadcasting has been proposed, and the actual realization of a high definition television system called a high definition television (HDTV) system has been planned. For this reason, a next generation DVD standard has been proposed in which the beam spot is narrowed by shortening the wavelength of the laser beam or increasing the numerical gap (NA) to increase the recording capacity. In addition to the method of narrowing the beam spot, a method of using the following single-sided multilayer recording medium has been considered (for example, Japanese Patent Application Laid-Open No. 2004-206849 (paragraphs 0036 to 0041, see Fig. 1). A layer (e.g., two layers) is formed on one side of the disc, and the objective lens is moved in the optical axis direction to focus the beam on each layer so that it can be reproduced on or / or from each recording layer. Enable recording

In a recordable recording medium, management data must be recorded for every additional recording of data. A recordable management zone is required for additional recording, and management data is formed on the inner circumference portion and the outer circumference portion of the data area. In current DVDs, recordable management zones on the inner periphery are arranged inside an emboss area.

However, in the case where the recordable area is arranged on both sides of the relief area (i.e., on both sides of the relief area), the relief area adversely affects the characteristics of the recording film, and thus this is undesirable.

Such a conventional single-sided multilayer recordable information recording medium has the following problems. That is, the positional relationship between the embossed area and the recordable management data recording area adversely affects the characteristics of the recording film.

It is an object of the present invention to provide a recordable recording medium, an information recording apparatus and an information recording method using the information recording medium in which the recording capacity can be increased without adversely affecting the properties of the recording film.

According to the embodiment of the present invention, the single-sided multilayer information recording medium has a recording layer,

An embossed management zone, an internal recordable management zone, a data area, and an external recordable management zone are arranged in order from the inside of each recording layer,

A burst-cutting area is arranged inside the embossed management zone of any one of the recording layers.

According to another embodiment of the present invention, an information recording apparatus records information on a single-sided multilayer information recording medium,

An embossed management zone, an internal recordable management zone, a data area, and an external recordable management zone are arranged in order from the inside of each recording layer, and the burst-cutting area has each layer having at least one internal recordable management zone and internal recording. In a possible management zone, at least one test zone, a management zone, and a guard zone are arranged inside an embossed management zone of any one of the recording layers, wherein one test zone and the management zone of the recording layers are among the recording layers. Overlap another guard zone of the device,

A dummy data recording unit for recording dummy data to prevent interlayer crosstalk in the guard zone;

A test unit for performing test writing in a test zone to optimize a recording wavelength;

A data recording unit for recording data in the data area; And

And a management data recording unit for recording management data in the management zone to manage the state of data recorded in the data area.

According to another embodiment of the present invention, an information recording method records information on a single-sided multilayer information recording medium,

An embossed management zone, an internal recordable management zone, a data area, and an external recordable management zone are arranged in order from the inside of each recording layer, and the burst-cutting area has each layer having at least one internal recordable management zone and internal recording. In a possible management zone, at least one test zone, a management zone, and a guard zone are arranged inside an embossed management zone of any one of the recording layers, wherein one test zone and the management zone of the recording layers are among the recording layers. Overlap another guard zone of the method,

Recording dummy data to prevent interlayer crosstalk in the guard zone;

Performing test writing in a test zone to optimize a recording wavelength;

Recording data in the data area; And

Recording management data in a management zone to manage the state of data recorded in the data area.

According to still another embodiment of the present invention, an information reproducing apparatus reproduces information from a single-sided multilayer information recording medium,

An embossed management zone, an internal recordable management zone, a data area, and an external recordable management zone are arranged in order from the inside of each recording layer, and the burst-cutting area has each layer having at least one internal recordable management zone and internal recording. In a possible management zone, at least one test zone, a management zone, and a guard zone are arranged inside an embossed management zone of any one of the recording layers, wherein one test zone and the management zone of the recording layers are among the recording layers. Overlap another guard zone of the device,

A data access method switching unit;

A judging unit for judging the recording state of the recording layer; And

And a control unit for causing the data access method switching unit to switch the data access method according to the determination result of the determination unit.

According to another embodiment of the present invention, an information reproducing method reproduces information from a single-sided multilayer information recording medium,

An embossed management zone, an internal recordable management zone, a data area, and an external recordable management zone are arranged in order from the inside of each recording layer, and the burst-cutting area has at least one internal recordable management zone and internal recording in each layer. In a possible management zone, at least one test zone, a management zone, and a guard zone are arranged inside an embossed management zone of any one of the recording layers, wherein one test zone and the management zone of the recording layers are among the recording layers. Overlap another guard zone of the method,

Data access method switching step;

A determination step of determining the recording state of the recording layer; And

And a control step of causing the data access method switching step to switch the data access method according to the decision result of the decision step.

The general architecture for implementing the various features of the invention will now be described with reference to the drawings. The drawings and the associated description are provided to illustrate embodiments of the invention rather than to limit the scope thereof.

Hereinafter, various embodiments of the present invention will be described with reference to the accompanying drawings. In general, according to one embodiment of the present invention, a single-sided multilayer information recording medium has a recording layer, and an embossed management zone, an internal recordable management zone, a data area, and an external recordable management zone are located from inside each of the recording layers. It is arranged in order, and the burst-cutting area is arranged inside the embossed management zone of any one of the recording layers.

(Optical disc recording / playback system)

1 and 2 are block diagrams of an information recording / reproducing system according to an embodiment of the present invention.

The information recording / reproducing system shown in FIG. 1 records information on the optical disk 10, optical disk 10 or functions as a medium for recording and reproducing information such as video data and user data. Command to the optical disc device 12 for reproducing information from the optical disc device 12, and reading necessary information from the optical disc 10 through the optical disc device 12, and reproducing video data. And a host device 14 for displaying the information about the user.

Device 16, such as an optical disk recorder or optical disk displayer as shown in FIG. 1, incorporates an optical disk device 12 and a host device 14 therein. Host device 14 is a central processing unit (CPU), a random access memory (RAM) used as a work area, and electrically removable and programmable for storing and maintaining various data and setting parameters to be retained even when the power is turned off. ROM (EEPROM) or flash memory. On these memories, various programs executed upon request from the user, data required for processing, file system requested for file management, and the like are recorded. For example, a UDF bridge file system of a DVD video format, a UDF file system of a DVD video recording format, a UDF file system of a next generation video format, a UDF file system of a next generation video recording format, application software, and the like are stored.

On the other hand, a system such as a personal computer as shown in FIG. 2 functions as a host PC 18. The transfer of the designation to the optical disk device 12 is performed by executing operating software (OS) or application software such as writing software or video playback software.

(Optical disk unit)

3 is an exemplary block diagram of an optical disk device according to an embodiment of the present invention. The optical disk apparatus focuses the laser beam emitted from the optical head (pickup head: PUH) actuator 22 on the information recording layer of the optical disk 10 to record or reproduce the information. The beam reflected by the optical disc 10 passes back through the optical system of the PUH actuator 22 and is detected as an electrical signal by the photodetector PD 24. The detected electrical signal is amplified by the preamplifier 26 and output to the servo circuit 28, the RF signal processing circuit 30, and the address signal processing circuit 32. In the servo circuit 28, a servo signal for focusing, tracking, and tilting the signal is output to the PUH actuator (focus, tracking, or tilt actuator) 22. As a method of reading data written in the RF signal processing circuit 30 and the address signal processing circuit 32, and a method of demodulating an address signal or the like, a slice method and a partial response maximum likelihood (PRML) method are known. In the optical disc apparatus, an optimal demodulation method is selected depending on the size of the focusing beam spot formed by the optical disc 10 and the PUH actuator 22 to be recorded or reproduced. A slice method, comprising: performing a linear waveform equalization on a reproduced signal, and then binarizing the signal, causing a nonlinear equalizer called a limiting equalizer to limit the low-frequency high amplitude component of the reproduced signal to a constant value. Background Art A method of binarizing a signal after equalizing a high frequency component is known. Regarding the PRML method in accordance with the frequency characteristic of the reproduced signal, an optimal PR class, for example, PR (1,2,2,21), PR (1,2,1), PR (1,2,2, 1), PR (3, 4, 4, 3) and the like are selected.

In the address signal processing circuit 32, the detected signal is processed to read physical address information indicating the recording position on the optical disc, and the physical address information is output to the controller 34. Based on the address information, the controller 34 reads data such as user data at a desired position or writes data at a desired position. At this time, this data is modulated by a recording signal processing circuit 36 into a recording waveform control signal suitable for optical disk recording. Based on this signal, the LD drive circuit LDD 38 causes the laser diode LD of the PUH actuator 22 to emit light on the optical disk 10 to record information.

In this embodiment, the wavelength of the laser diode is 405 ± 15 nm. The NA of the objective lens used to focus the light of the wavelength on the optical disk of the optical head 22 is 0.65. As the intensity distribution of incident light just before light enters the objective lens, the relative intensity at the outer periphery (aperture boundary position) of the objective lens when the central intensity is set to "1" is called "RIM intensity". The value of the RIM intensity in the DVD format is set within the range of 50 to 70%. At this time, the amount of wavefront aberration in the optical head 22 is optically designed up to 0.33λ (0.33λ or less) with respect to the wavelength λ.

(Optical disk)

4 is a diagram of a double layer optical disc having two information recording / reproducing layers according to an embodiment of the present invention. This disc has two information recording layers (hereinafter referred to as layers) as shown in Fig. 4, and the layout of the information areas of these layers is slightly different from each other. As a disc used in this embodiment, a write-once type optical disc in which recording marks can be written in one position only once and a rewritable type in which the recording marks can be overwritten or erased. There is an optical disc.

(Format of Optical Disc)

5 shows the physical specifications of an embossed area and a rewritable area on an optical disc according to an embodiment of the present invention. CLV in the rotation control method is an abbreviation of a constant linear speed and means a rotation control method for maintaining a constant linear speed. Eight to twelve modulations (ETMs) are one of the modulation methods. In this way, each of the eight information bits is converted to twelve channel bits with redundancy to record the signal. By providing redundancy, the information recording / reproducing reliability is significantly improved compared to the case where the information bits are recorded directly on the optical disc.

Hereinafter, the reflectance of the disk according to the present embodiment will be described. On this disc, when observation is performed at a wavelength of 405 nm, the maximum reflectance of the relief angles of layer 0 and layer 1 after recording and the maximum reflectance of the recording signal fall within the range of 3% to 9%. On each layer of this optical disc, unevenness serving as a guide groove for recording / reproducing information is formed as shown in FIG. When viewed from the side where light enters, the front part of the guide groove is called a groove, and the back part of the guide groove is called a land. Discs include discs where recording is performed only on the home track, discs where recording is performed only on the land track, and discs where recording is performed on both the home track and the land track. Further, the guide grooves wobble in a sinusoidal shape in the radial direction. The phase of the sine wave is switched to record physical address information representing the physical position in the information recording area, and disc specific information is recorded. The wobble modulation region includes 16 wobbles out of 93 wobbles. In addition, one symbol corresponding to one bit of information recorded on the wobble signal includes four wobbles. The specification of the wobble signal is not limited to the above specification. However, this description will continue with reference to these specifications unless otherwise indicated.

(Layout of the information area)

7A and 7B show the layout of each layer of the disc. On layer 0 and layer 1, the regions are divided to have approximately the same configuration. However, the BCA region is allocated to either layer 0 or layer 1. This stabilizes the reading of information from the BCA area. Since interlayer crosstalk is large in the BCA mark used for reading signals in the BCA area, when the BCA areas are arranged in two layers, the signals of the two layers interfere with each other and make information reading difficult.

The configuration of the layer area includes a burst cutting area (BCA), an embossed management zone (system lead-in or system lead-out area), an inner peripheral readable management zone (data lead-in or data lead-out area), a data area, And an outer peripheral readable management zone (intermediate region) arranged from the inner peripheral portion. In the BCA area, the BCA mark is recorded in advance by grooving the substrate, peeling off the reflected film, and changing the recording medium. The BCA mark is a comb-shaped mark with the same information modulated along the circumferential direction of the optical disc and arranged along the radial direction. The BCA code is recorded by the modulation performed by the RZ modulation method. Pulses with narrow pulse widths (= low reflectance) should be narrower than half the channel lock width of the BCA code. Since the BCA mark has the same information along the radial direction, the BCA mark does not need to be tracked. Information can only be reproduced from the BCA mark by focusing the BCA mark.

Information is recorded by an embossed pit in an embossed management zone. This information includes optical disc management data such as disc identification information and capacity of the data area. The shortest mark length of the embossed pit in this area is twice the length of the data area. As a result, the information in the normal data area is reproduced by the PRML method. However, the information can also be demodulated by using the slice method in the relief management zone, and the reliability of reading the information is improved. It is important to improve the reliability of the embossed management zone because the management data serving as a base for reading the information from the disc, the information of the copyright management, and the like are recorded in the embossed management zone.

In the recordable management zone, as in the data area, grooves are formed that function as guide grooves. In this area, the signal is recorded at the same density as that of the data area. In this area, a test write area, a management zone for recognizing the recording state of the data area, a tracking overrun area for DPD tracking, a guard zone for keeping the amount of interlayer crosstalk constant, and the like are arranged.

In this data area, data such as video data and user data are recorded.

(Interlayer Crosstalk)

Hereinafter, interlayer crosstalk of an optical disc according to an embodiment of the present invention will be described. In the double-layer disc according to the embodiment of the present invention, as shown in Figs. 8A and 8B, when the recording state of the layer (layer 0) except for the layer to be recorded (layer 1 is reproduced) is not uniform, The signal of layer 1 of (push-pull signal) is undesirably offset by crosstalk. As shown in Fig. 9, when a signal is recorded on layer 1, the optimal write power varies depending on whether layer 0 has been recorded. These problems arise because the transmittance and reflectance of the recording medium of the layer 0 change depending on the recording state and the unrecorded state, and why the intermediate layer cannot be made to a thickness that suppresses optical aberration, and for other reasons. However, it is very difficult to physically reduce these properties. Therefore, in the optical disc according to the embodiment of the present invention, an interval (recording prohibition area) as shown in Fig. 10 is formed, so that information can be recorded and reproduced without any problem even when the signal is offset.

10 shows the recordable range of layer 1 when layer 0 is recorded.

The recordable range of layer 1 is the range obtained by subtracting the gap on both sides from the recorded area of layer 0. The width of this gap can be calculated by equation (1).

Spacing = Δr + e + Δs (1)

Here, Δr is the relative difference between the same design radius of layer 0 and layer 1 and the actual spinning position, which is caused by manufacturing error or the like, and e is the amount of eccentricity. Reference symbol Δs is the radius of the layer bundle on the unplayed layer.

(Detailed layout)

11 and 12 show examples of detailed layouts of information regions on the inner circumferential edge and the outer circumferential edge of the dual-layer optical disc according to the embodiment of the present invention. The BCA region (not shown) is on the deepest peripheral edge of layer 0 or layer 1. In the inner peripheral recordable management zone of layer 0, two guard zones, a test zone 608 physical segment (PS) block, a management zone (400 PS block), and a format information recording area are arranged. In the inner peripheral recordable management zone of layer 1, two guard zones and a test zone 608 physical segment (PS) block) are arranged. The guard zone is an area in which dummy data is recorded or maintained without the countermeasure of overruns of interlayer crosstalk and DPD tracking being recorded. The test zone is an area where test writing to optimize the recording waveform is performed before management data and user information is recorded on the optical disc. The management zone is an area in which management data for managing the state of data recorded in the data area is recorded.

The test zone at layer 0 is arranged at a position separated from the relief management zone by the length of the interval (guard zone) to avoid crosstalk in the relief management zone. The test zone and management zone on layer 0 are adjacent to each other and are arranged to overlap the guard zone of layer 1. The guard zone of layer 1 has a width that is greater than the sum of the widths of the test zone and the management zone of layer 0 by the width of the gap on both sides. On the other hand, the test zone of layer 1 is arranged to overlap the guard zone of layer 0 and has a narrower width than the guard zone of layer 0 by the width of the gap on both sides. The guard zone can record dummy data or can be kept unrecorded regardless of the recording of the data. For this reason, the layout of the optical disc according to the embodiment of the present invention has the following features. That is, the state of the opposing layer overlapping the guard zone and the management zone is a uniform state, that is, a recorded state or an unrecorded state, so that test writing and recording of management data can be performed stably.

In each of the outer peripheral recordable management zones of layer 0 and layer 1, two guard zones and a test zone are arranged as shown in FIG. As in the inner periphery, the guard zones are arranged on opposite layers overlapping the test zones, the width of the guard zone being greater than the sum of the widths of the gaps on both sides and the width of the test zones. In addition, the inner guard zone of layer 1 can be used as an extended management zone.

(Content of BCA)

13 shows the content of information recorded in the BCA area of the optical disc according to the embodiment of the present invention. The BCA data includes two BCA preambles 73 and 74, two postambles 76 and 77, and a BCA data area (BCAA) 78 and 79. A BCA error detection code (EDC _BCA ; 80) and a BCA error correction code (BCC _BCA ; 81) are added to each of the BCA data areas (BCAA) 78 and 79, and the BCA junction area 75 is a BCA postamble 76 ) And the BCA preamble 74. In addition, one sync byte (SB _BCA ) 83 or one resync byte (RS _BCA ) 84 is inserted every four bytes. Each of the BCA preambles 73 and 74 include 4 bytes and both have " 00h " written therein. The sync byte SB _BCA 83 is arranged immediately before each of the BCA preambles 73 and 74. In each of the BCA data areas (BCAA) 78 and 79, 76 bytes are set. Each of the postambles 76 and 77 includes 4 bytes and both have a repeated pattern of "55h" recorded therein. The BCA junction area 75 includes 4 bytes and all have "AAh" repeatedly recorded therein.

In the BCA data area, one BCA record that functions as one unit or piece of information is recorded. The piece of information includes, for example, identification information of the disc or information for copy control. 14 shows an example of BCA recording indicating identification information of a disc. As the first two bytes, a BCA record identifier (identification information, copy control information, etc.) indicating the type of BCA record is recorded. Subsequently, the version number (1 byte) of the BCA record indicating the format of the BCA record is recorded. Next, the data length (1 byte) for determining the size of the BCA recording is recorded. This length does not include 4 bytes of the BCA record identifier that serves as the header of the BCA record for the data length.

One-byte book type / disc type is recorded. The book type is an identifier indicating a format of a disc and a read-only type, a write-only type, a rewritable type, or a format type such as a single-sided single layer type or a single-sided double layer type. In the disc type, as shown in Fig. 15, pieces of information are each assigned bits. As the most significant bit, the mark polarity indicates whether the reflectance of the recording mark (feet) is higher (low-high recording) or lower (high-low recording) than the unmarked portion. As the next bit, a flag indicating whether the disk is a twin format (TF) disk having a format changed according to the layer is recorded. A TF flag of "0" in a binary system indicates that the disk is not a twin format disk. A TF flag of "1" in the binary system indicates that the disk is a twin format disk. The next two bits are used as the tracking polarity identifier of the tracking signal. Bit b1 represents information of layer 1 and bit b0 represents information of layer 0. When this value is "0", the signal is recorded or reproduced on / from the home track. When this value is "1", the signal is recorded or reproduced on the land track.

In addition, a 1-byte extended part version and a 1-byte extended disk type are recorded, and the last 1 byte is reserved. As shown in Fig. 16, in the most significant bit of the extended disk type, a double layer flag indicating whether or not the disc is a double layer disc is provided. When the disk is a dual layer disk, the identifier is "1", otherwise the identifier is "0". In addition, the BCA location flag set to "1b" is arranged when the BCA is arranged in layer 0. FIG.

As another embodiment, as shown in FIG. 17, when all data is written to the home track of layer 0, the double layer flag may be arranged at the location of the tracking polarity in the least significant bit b0 of the disc type. .

In any case, the BCA of the deepest peripheral edge of the disc is reproduced to quickly determine whether the disc is a double layer disc. In addition, polarity information of the recording track of each layer can be obtained. For this reason, the process of accessing the recordable management zone and data area of the desired layer can then be performed quickly, preferably for operating the tracking servo.

(Content of embossed management area format information)

18 shows the content of the physical format information in the relief area formed on layer 1;

The book type (BP 0) includes a read-only disc, a rewritable disc, a rewritable disc, a re-playable disc, a high density read-only disc, a high density rewritable disc, a high density recordable disc, or a high density re-playable disc. Identifier indicating the format of the same disk. The part version BP 0 is the version control data in the format.

As the disk size BP1, information representing the diameter of the disk is recorded. For example, 0000b is recorded when a 12-cm disc is used, and 0001b is recorded when an 8-cm disc is used.

As the maximum transfer rate of the disc BP1, if necessary, the maximum transfer rate required for normal reproduction of data recorded on the disc is recorded. Examples of maximum transfer rates are 2.25 Mbps, 5.04 Mbps, 10.08 Mbps, 20.16 Mbps, and 30.24 Mbps.

A disk structure (BP 2), the polarity information (track path) indicating the number of layers in the format, whether the tracks are directed from the inner periphery to the outer periphery or from the outer periphery to the inner periphery on each layer, and A layer type indicating whether the disc includes a rewritable user data area, a recordable user data area, or an embossed user data area is recorded. The number of layers is not the number of layers of the disc, but the number of layers in the format.

The recording density BP 3 includes information indicating the linear density and the track density in the disc tangential direction. Examples of linear densities are 0.267 μm / bit, 0.293 μm / bit, 0.409 to 0.435 μm / bit, 0.280 to 0.295 μm / bit, 0.153 μm / bit, and 0.130 to 0.140 μm / bit. Examples of track densities are 0.74 μm / track, 0.80 μm / track, 0.615 μm / track, 0.40 μm / track, and 0.34 μm / track.

Details of the data area allocation (BP 4 to BP 15) are shown in FIG.

The BCA descriptor BP 16 specifies whether the BCA is present.

The byte positions 17 to 26 specify ID information of the readable recording speed.

The byte position 27 specifies the extended part version of the book.

Byte positions 28 to 31 are reserved.

The actual number of maximum read speeds (BP 32) specifies the actual number of maximum read speeds allowed for such discs. The actual maximum read rate is specified based on whether the 1x read rate is a channel bit rate of 64.8 Mbps and is specified by the formula below.

Actual maximum read rate = value × 0.1

The layer format table shows the format for each of layer 0 and layer 1.

Byte position 33 specifies the layer format table.

Byte locations 34-127 are reserved.

The mark polarity descriptor BP 128 defines the disk type of reflectance. For example, 0b indicates that the signal from the mark is greater than the signal from space, that is, this disk is a low-to-high disk, 1b indicates that the signal from the mark is smaller than the signal from space, In other words, this disk is a high-to-low disk.

Speed BP 129 defines the linear speed for the disc. For example, 0100 0010b represents 6.6 m / s. The actual speed is specified by the formula below.

Actual linear velocity = value × 0.1 (m / s)

The rim intensity BP 130 in the tangential direction specifies the Rim intensity in the tangential direction of the reference optical head on which BP 132 is defined. The actual Rim strength is specified by the formula below.

Actual Rim Strength = Value × 0.01

Rim intensity BP 131 in the radial direction specifies the Rim intensity in the direction of the direction of the reference optical head in which BP 132 is defined. The actual Rim strength is specified by the formula below.

Actual Rim Strength = Value × 0.01

Read power BP 132 specifies the read power on the read surface of the disc for playback. For example, 0000 0101b represents 0.5 mW. The actual read power is specified by the formula below.

Actual read power = value × 0.1 (mW)

The actual number (BP 133 to BP 148) of the i-th recording speed (i = 1, 2, ... 16) specifies the actual number of the i-th recording speed, where "i-th" is the number of disks. Means the i-th lowest writing speed among the applicable writing speed (s). Therefore, BP 133 is filled with a value for the maximum recording speed. For example, 0000 1010b represents 1x and 0000 0000b is reserved. The actual i-th writing speed is specified based on whether the 1x writing speed is the default writing speed for class 0dp, and is specified by the following formula.

Actual i-th writing speed = value × 0.1

In the absence of an i-th write rate, these bytes are reserved.

The reflectance of the data area for layer 0/1 specifies the reflectance of the data area for each layer. For example, 0000 1010b represents 5%. The actual reflectance of the data area is specified by the formula below.

Actual reflectivity of the data area = value × 0.5

Bit b7 (BP 150 or BP 153) of the push-pull signal for layer 0/1 specifies the track shape of the disk for each layer and the remaining bits b6 to b0 specify the amplitude of the push-pull signal. do. For example, 010 0000b (amplitude of the push-pull signal) represents 0.40. The amplitude of the push-pull signal is (I ₁ -I ₂ ) _pp / (I ₁ + I ₂ ) _DC before recording. The actual amplitude of the push-pull signal is specified by the formula below.

Actual amplitude of push-pull signal = value × 0.01

The "on track signal for later 0 / 1dp" (BP 151 or BP 154) specifies the amplitude of the on track signal for each layer. For example, 0100 0110b represents 0.7. The actual amplitude of the on track signal is specified by the formula below.

Actual amplitude of the on-track signal = value × 0.01

Byte locations 155 to 511 are reserved.

Byte locations 512-539 specify the write pulse information for layer 0.

Byte locations 540-567 specify the write pulse information for layer 1.

Byte locations 568-2047 are reserved.

19 shows the detailed contents of the data area allocation (BP 4 to BP 15). The data area allocation includes the start PSN (04 0000h) of the 3 byte data area, the maximum PSN (FB CCFFh) of the 3 byte data recordable area, and the end PSN (73 DBFFh) on layer 0 of 3 bytes. The starting PSN of the data area represents the starting PSN of the data area of layer 0. The maximum PSN of the data recordable area represents the terminal PSN of the data area of layer 1. The terminal PSN on layer 0 represents the final PSN of the data region of layer 0.

(Content of recordable management area format information)

20 shows format information of a recordable management zone.

The format information shown in Fig. 20 is recorded by the optical disk apparatus in the recordable management zone in the process of recording information on the disk. The details BP 4 to BP 15 of the data area are different from those of FIG. 18. 20 differs from FIG. 18 in that the starting PSNs (BP 256 through 263) of the boundary zone are additionally recorded.

FIG. 21 shows the contents (BP 4 to BP 15) of data area allocation in the format information of the recordable management zone shown in FIG. 20A. In this data area allocation, the starting physical sector number (PSN) (04 0000h) of the data area, the last recorded PSN of the last R zone, and the ending PSN on layer 0 are recorded.

Fig. 22 shows details of the start physical sector number of the border zone in the format information of the recordable management zone. The starting physical sector number (PSN) of the border-out area of the first border and the starting physical sector number (PSN) of the border-in area of the next border are recorded. When the next boundary formation is prohibited, all starting physical sector numbers of the region within the boundary are filled with zeros. Thus, when the number is filled with zeros, it can be determined that the disc is complete.

(Management zone)

23 shows the configuration of a management zone. The lead-in recording management data RMD is recorded in the first block of the management zone. The recording management data double zone is allocated to the next seven blocks of the management zone. The recording management zone is allocated to the remaining area. The lead-in recording management data is information recorded when the optical disk apparatus records data in the management zone for the first time. As this information, as shown in Fig. 24, a drive manufacture identification number, which is an identification number of the manufacture of the optical disc apparatus for performing recording, a serial number and a model number of the drive, and a unique disc identifier are recorded. As a unique disc identifier, a unique number for each disc is recorded by the optical disc apparatus to identify the disc.

In the recording management data double zone, a copy of the recording management data is recorded when the management zone is extended. In the recording management zone, recording management data RMD indicating the recording state of the data area is continuously recorded for each block. Since the information cannot be overwritten on the write once disc, a piece of information is continuously and additionally recorded on the next unused block at each time the contents of the recording management data are updated. Therefore, the last information is the latest RMD information.

25 shows a configuration of recording management data.

The recording management data includes 32 fields. The first field is reserved. Numbers are consecutively assigned to the following fields. Different pieces of information are recorded in the fields respectively.

26 shows RMD information of field 0. FIG.

The RMD format (BP 0 to BP1) specifies an RMD format code. The RMD format code indicates the recording format of the RMD.

The disk state BP 2 specifies the disk state as follows.

00h ... indicates that the disc is empty.

02h ... Indicates that the disc has been recorded and has not been completed.

03h ... Indicates that the disc is complete.

08h ... Indicates that the disc is in write mode U.

Other things ... are reserved.

As the disk state, as shown in Fig. 27, a padding state and completion information are recorded. For example, the padding state is assigned to the upper 4 bits and the completion information is assigned to the lower 4 bits. As the padding state, information indicating whether the guard zone of the layer 0 has been recorded is recorded. When information indicating that the guard zone of layer 0 has been recorded, recording for layer 1 starts. As completion information, information indicating whether data recorded on the disc is completed is recorded. For example, 0h indicates the state in which data is recorded in the data area, and 1h indicates that the data is completed on one boundary. 2h represents a state in which data is recorded in the data area and not completed. In addition, 3h indicates that the disk is completed in the state except for the state represented by 1h.

As another embodiment, by using the spare at byte position 3 in FIG. 26, when the completion information and the formatting information are arranged at byte position 2 and byte position 3, respectively, multiple pieces of information can be recorded.

Fig. 28 shows details of data area allocation in recording management data. Byte position 22 is reserved. The byte positions 23 to 25 specify the start PSN (04 0000h) of the data area. Byte position 26 is reserved. The byte positions 27 to 29 specify the maximum PSN (FB CCFFh) of the data recordable area. Byte position 30 is reserved. The byte positions 31 to 33 specify the terminal PSN 73 DBFFh on layer 0.

29 shows the contents of the resumed data area allocation. In the resumed data area allocation, the value of the data area allocation is updated in formatting or completion. The update identifier is information indicating a state in which the data area allocation is updated. When the data area allocation is updated in the formatting, 1h is recorded. When the data area allocation is updated in completion, 2h is recorded.

30 shows the contents of the test zone arrangement information. Since the position of the test zone may be changed by expansion or shift, the starting physical sector number and the ending physical sector number or area size of the latest test zone (inner peripheral test zone, outer peripheral test zone, or extended test zone) are It is written on the bytes of the test zone.

31A and 31B show RMD information of field 1. FIG. RMD field 1 includes OPC (Optimal Power Control) related information. In RMD field 1, OPC related information can be recorded up to four drives that may be present together in the system. In the case of a single drive, the OPC related information is recorded in field # 1 and the other fields are set to 00h. In all cases, the unused field of RMD field 1 is set to 00h.

OPC related information of a given drive is always recorded in field # 1. If field # 1 of the current RMD does not include the provided information consisting of the drive manufacturer ID, serial number, and model number, the information of fields # 1 to field # 3 of the current RMD is the field # 2 to field # of the new RMD. Copied to 4 and the information in field # 4 of the current RMD is discarded.

If field # 1 of the current RMD includes the provided drive information, the information in field # 1 is updated and the information in the other fields is copied into fields # 2 through # 4 of the new RMD.

32 shows the content of RMD information in field 3. FIG. In field 3, the out-of-bounds starting physical sector number (PSN) of each boundary area, the management zone number currently used, the starting PSN and size of each extended management zone, the test zone number currently used, and the length of each extended test zone The starting PSN and the ending PSN are recorded.

33A shows the content of the RMD information in field 4. FIG.

RMD field 4 specifies R zone information.

The portion of the data recordable area reserved for recording user data is called an R zone. The R zone is divided into two types according to the recording conditions. In an open R zone, additional data may be attached. In the complete R zone, another user data cannot be attached. There are no more than three R zones in the data recordable area.

The portion of the data recordable area not yet reserved for recording data is called an invisible R zone. The area for the next R zone may be reserved in the R zone if invisible.

In case another data can be attached, there is no invisible R zone.

The invisible R zone numbers BP 0 through BP1 specify the invisible R zone numbers. The invisible R zone number is the total number of the invisible R zone, the open R zone, and the completed R zone.

The first open R zone numbers BP 2 to BP3 specify the first open R zone numbers. In the absence of a first open R zone, all bytes of this field must be set to 00h.

The second open R zone numbers BP4 to BP 5 specify the second open R zone numbers. In the absence of a second open R zone, all bytes of this field must be set to 00h.

BP6 to BP15 are reserved. All bytes are set to 00h.

The starting PSN of R zone #n (n = 1, 2, ..., 254) (BP 16 to BP 19, BP24 to BP 27, ..., BP 2044 to BP 2043) specifies the starting PSN of the R zone. do. If these fields are set to 00h, no R zone is reserved for this R zone number.

The last recorded PSN (BP 20 to BP 23, BP28 to BP 31, ..., BP 2044 to BP 2047) of R zone #n (n = 1, 2, ..., 254) has a data type of 1b. The PSN of the last recorded physical sector of the R zone is specified except the sector which is (padding data). If these fields are set to 00h, they do not mean the recorded PSN for this R zone number.

33B shows the content of the RMD information in fields 5 to 21. Information for managing the state of the user data area recorded in the data area is recorded in the fields 5, 6, ..., 21. The user data area is divided into R zones and managed. In fields 5, 6, ..., 21, the starting physical sector number (PSN) of the R zone and the last physical sector number (PSN) of the area currently recorded in the R zone are recorded. It is allowed to form up to these open R zones where recording is stopped in the direction of the R zone. Bytes are also set for multiple R zones for which recording has not been completed.

(Data regions and boundaries)

34A, 34B, 34C, 34D, 34E, and 34F show recording states of the data area. In the data area, as shown in Fig. 34A, user data is recorded in the unit of the R zone. At this time, pieces of information such as the start physical sector number of the recorded R zone are continuously recorded and managed as recording management data. When boundary closing is performed, an out-of-boundary area is formed continuously in the user data as shown in Fig. 34B in the first boundary closing. At this time, the physical format information of the recordable management zone (not shown) is also recorded. The out of bounds area functions as an overrun area in DPD tracking. When border closing is performed, an area in which user data is recorded is called a user data area. From this area, the information can also be read by an apparatus such as an optical disc player which performs tracking by DPD tracking.

When the next data is recorded, as shown in Fig. 34C, the bordered area remains unrecorded, and the data area is continuously recorded in the R zone. In this case, when border closing is performed, as shown in Fig. 34D, intra-boundary and out-boundary regions are formed. At this time, the updated format information is recorded in the bordered area.

The updated format information is the same information as the physical format information shown in FIG. However, the data area allocation and starting physical sector number of the boundary zone have the value of the target boundary.

The state in which the second boundary closing is performed is shown in Fig. 34E.

Finally, when the disc is completed, an out-of-bounds region or terminator is written up to the final physical sector of layer 1, as shown in FIG. 34F. All terminators are dummy data having a value of "0". When the completion of the disc is completed, the disc state of the recording management data is updated.

(boundary)

35A and 35B show the configuration of the out-of-boundary region and in-border region and the size of the out-of-boundary region. As shown in Fig. 35A, a copy of the RMD is recorded in the out of bounds area, and update format information is recorded in the in bound area. One recording unit is a physical sector (PS) block and includes 32 physical sectors. The out of bounds area is used as an overrun area of tracking as shown in Fig. 34B, and the size of the out of bounds area increases toward the outer periphery of the disc.

(Formatting)

The formatting of the disc will be described below. In the optical disc according to the embodiment of the present invention, in order to perform stable recording, information can be recorded on layer 1 only in the portion overlapping the recorded portion of layer 0. FIG. Thus, before information is recorded on layer 1, layer 0 must be formatted. The formatting may be performed before the information is recorded on the disc, or may be performed just before the recording on the layer 1 starts after the recording on the layer 0 is completed. Formatting mainly involves two operations. One operation writes data such as dummy data in the required guard zone of layer 0, i.e., the guard zone near the data area. Another operation changes the recordable maximum physical sector number of layer 0.

Fig. 36 shows the range (inner circumference) where signals are recorded in formatting, and FIG. 37 shows the range (outer rim) in which signals are recorded in formatting. The hatched area is the recorder. The data to be recorded is dummy data in which all values are "0". After the data has been recorded in the guard zone by formatting in FIGS. 36 and 37, the start and back ends of the data area of layer 1 and the test zone are writable to enable information to be written on layer 1. Also, on the optical disc, when the formatting is completed, the format information of the disc state of the recording management data shown in Figs. 18A, 18B, and 27 is changed.

When the formatting is in process, i.e., when the recording of the guard zone is performed before the disc is shipped, the user can directly record the information on the disc without performing the formatting process.

38 and 39 show changes in the area when the recordable maximum physical sector number of layer 0 is changed. When the amount of data to be written is determined in advance and the disk does not need to be used until the outermost periphery, the recordable maximum physical sector number of layer 0 may be changed to make it unnecessary to fill the data area with excessive dummy data or the like. It may be. Completion of the disc can be preferably performed at high speed, and preferably, the outer periphery having a relatively poor recording quality can be prevented from being used. In formatting, the desired physical sector number may be written as the update recordable maximum physical sector number of the layer 0, that is, the update recordable maximum physical sector number of the recording management, in order to be able to change the width of the data area. In addition, in border closing and completion, the value of data area allocation of formation information also changes.

At this time, as shown in Fig. 38, the portion of the guard zone continuous to the data area is shifted to the inner circumferential edge. Alternatively, as shown in FIG. 39, new guard zones A0 and A1 are created. In this case, the guard zones in which the dummy data is written in the formatting are only guard zones A0 and A1 adjacent to the data area. As the width of the guard zone, a width at least exceeding the gap may be used. However, if the width of the guard zone is larger than the width, excessive recording increases undesirably. Thus, when the guard zone moves to the inner periphery, the required amount of data decreases accordingly. 40 shows the size of a normal guard zone of a disk whose start sector number and end sector number of the data area of layer 0 are 40000h and 73DC00h, respectively. When the update recordable maximum physical sector number changes to the inner periphery, the size of the guard zone may be changed continuously. In this case, however, fixing of the guard zone size is hindered. For this reason, in the present embodiment, the data area is divided into three areas, and a value that can sufficiently guarantee the interval is set in the divided area so that the size of the guard zone can be easily determined. The value in FIG. 40 represents the number of PS blocks. One PS block includes 32 sectors.

The minimum number of data required for the guard zone can be determined by the following equations (2) and (3).

Number of PS blocks in the guard zone of L1 = π {(radius + spacing) ^2- (radius) ² } / track pitch / length of one PS block in the linear direction (2)

Number of PS blocks in guard zone of L0 = (number of PS blocks in guard zone of L1) x 2+ (number of PS blocks in test zone of L1) (3)

In this embodiment, this calculation is performed where the spacing is about 100 mu m, the track pitch is 0.4 mu m, and the length of one PS block in the linear direction is 13546.01 mu m (132804 channel bits x 0.102 mu m).

(Expansion of test area)

In addition, the test zone is shifted or extended to the guard zone. The position of the shifted or extended test zone is recorded as array information in the test zone of the recording management data.

(Recording order)

Hereinafter, the recording procedure on the optical disc according to the embodiment of the present invention will be described.

(Example 1)

In the recording order shown in Figs. 41A and 41B, the width of the data area is fixed by formatting first, and recording of a predetermined guard zone of layer 0, format information zone of layer 0, management zone of layer 0, and the like are performed. Thereafter, data is recorded in the data area. The recording of data begins with the deepest edge of layer 0. Upon completion of recording of layer 0, a laser beam is moved to layer 1 to record data from the outer periphery of layer 1 to the inner periphery. When the data does not reach the deepest edge of layer 1, the optical disk apparatus automatically records dummy data such as terminators to fill both the data areas of layer 0 and layer 1 with recording data. In addition, recording of the guard zone of layer 1 is performed to complete the writing of the dask. 41A and 41B correspond to the upper side and the lower side of FIG. 39.

(Example 2)

In the recording order shown in Figs. 42A and 42B, a method of continuously and additionally recording data in the state where only one open R zone is used is used. Data recording starts from the inner periphery of layer zero. Upon completion of the recording of layer 0, the recording starts from the outer periphery of layer 1. This order is the recording order as shown in Figs. 34A and 34B (boundary structure).

(Example 3)

In the recording order shown in Figs. 43A and 43B, a method of continuously and additionally recording data in a state where a plurality of open R zones is provided is used. In this case, an open R zone is provided on layer 0, as shown in FIG. 43A. When layer 0 has an unrecorded area, the overlapping portion of layer 1 is a write inhibited area. As shown in Fig. 43B, when the recording is performed in the unrecorded area of the layer 0, the write prohibition of the layer 1 is deleted.

(Method of record ban)

44A and 44B show the relationship between the open R zone of layer 0 and the range of the recordable area. In the state shown in FIG. 44A, the inner circumferential guard zone and the outer circumferential guard zone of layer 0 are recorded, and data is recorded on layer 0. FIG. However, layer 0 has two open R zones, and data is not recorded in this open R zone. In this case, as shown in Figs. 44A and 44B, the recordable range serving as the final open R zone is from the physical sector of layer 1 corresponding to the last physical sector of the open R zone located on the outer periphery of layer 0. This is a part obtained by subtracting the number of sector "A" required to ensure the interval.

Data is recorded in the second open R zone in the state of FIG. 44A. When the second open R zone is filled with recording data, as shown in Fig. 44B, the recordable area extends into a portion defined by the last sector number of the first open R zone.

The width of the gap is determined according to equation (1). However, when the spacing is constant on the disc, the number of sectors required to ensure the spacing is small on the inner periphery. When the update recordable maximum physical sector number changes to the inner periphery, the range of the write prohibition may change continuously. However, fixing this range is a hindrance. In this embodiment, the data area is divided into a plurality of areas, and a value that can sufficiently guarantee the interval in the divided data area is set so that the range of the prohibition of recording can be easily determined.

Fig. 45 shows the number of the sector " A " required to ensure the spacing on the optical disk according to this embodiment. In the optical disc according to the present embodiment, a number obtained by bit-transforming a physical sector number of layer 0 is assigned to a plurality of physical sector numbers of layer 1 at the same radius as the physical sector number of layer 0. Thus, the final physical sector number in the recordable area of Layer 1 is obtained by subtracting the number "A" from the value obtained by bit-converting the final physical sector number of the outer peripheral open R zone of the first and second open R zones. Is a value. The minimum number of data required to ensure the spacing is determined by equation (4) below.

Sector number = {π {radius + spacing) ^2- (radius) ² } / (track pitch) / (linear length of one PS block)} × 32 (4)

The number "32" is the number of sectors included in one PS block.

(Example 4)

In the recording sequence shown in Fig. 46, a method of repeatedly recording a predetermined amount of data on layer 0 and continuously recording data within the same radius width of layer 1 is used. However, the recording area of layer 1 is narrower than the recording range of layer 0 by the width of the interval as shown in Figs. 11 and 12.

(Finished)

47A, 47B, and 47C and FIGS. 48A and 48B show the state of the disc when the disc is completed. The state shown in FIG. 47A shows the case where recording is stopped in the middle on layer 0. FIG. In this case, as simple completion, the completion as shown in Fig. 47B can be performed. Upon completion of recording of the user data, the terminal physical sector number of the user data is recorded as the update recordable maximum physical sector number of the recording management data, and the width of the data area is changed. The out-of-boundary area is recorded in the data area of the guard zone and the outer periphery shifted to a portion adjacent to data such as the guard zone and format information on the inner periphery of layer 0, thereby completing a simplified completion.

Further, as shown in Fig. 47C, when the dummy data (terminal) is recorded in the range of the layer 1 corresponding to the recording range of the layer 0, the playback compatibility of the disc is further improved. This completion is called perfect completion.

The state shown in Fig. 48A shows the completion performed when recording data is also provided on layer 1. When recording data is also provided on layer 1, unrecorded portions such as format information or an open R zone of layer 1 are recorded as shown in Fig. 48B, and then the terminator is not recorded in the data area of layer 1. It is recorded on the part, and the guard zone of layer 1 is recorded to complete the completion. Further, in the completion, the completion information of the disc state of the field 0 of the recording management shown in Fig. 27 is changed.

(Extension of Records Management Area)

In the optical disc according to this embodiment, the recording management zone can be extended. When the recording management zone prepared in the recordable management zone on the inner periphery is recorded as a whole, the recording management zone is expanded. The recording management zone can be extended in the bordered area as shown in FIG. This expanded area is formed in the saved area as an intra-traditional area when the boundary is closed and a new boundary is formed.

When the recordable maximum physical sector number is updated as shown in Fig. 50, the recording management zone can be expanded on the outer periphery.

Further, as shown in Fig. 12 (outer peripheral configuration), even if the recordable maximum physical sector number is not updated, a part of the guard zone on the outer peripheral edge of layer 1 can be used as the recording management zone. When the recording management zone is expanded, the recording management zone used at this time is padded by the latest recording management data. In addition, a copy of the latest recording management data is recorded in the recording management data double area. In addition, the size information and the starting physical sector number of the extended management zone #n of the recording management data are updated.

As a result, the recording management zone currently used is always formed in one position. Further, with reference to the recording management data double zone, the position of the latest recording management zone can be preferably found.

(Different layout)

A detailed layout on the inner periphery in accordance with another embodiment is shown in FIG. 51. In this embodiment, the recording management zone can be extended to the inner periphery of the layer 1. Since the recording feature on the inner edge is more stable than the recording feature on the outer edge, the layout has a higher stability than the layout in which the recording management zone extends to the outer edge. This recording management zone is adjacent to the data area, and access to the data area is preferably simple.

52 shows a detailed layout on the inner periphery of an optical disc according to another embodiment. In this embodiment, the recording management zone can be extended to the inner periphery of the layer 1. Since the recording management zone is adjacent to the data area, access to the data area is preferably simple.

53 shows a detailed layout on the outer periphery of an optical disc according to another embodiment. In this embodiment, since the data area of layer 1 shifts from the data area of layer 0 to the inner periphery by the width of the interval, when the data area of layer 0 is recorded, the information is recorded even if the guard zone on the outer periphery is not recorded. Can be written to the data area of layer 1.

(Player device)

Fig. 54 shows a configuration of an optical disc player according to the embodiment of the present invention. In general, on the read-only disc 110, address information is formed by the pit together with the user data. Thus, the address is read by the RF signal processing circuit 130 simultaneously with the reproduction of the data. The configuration other than the recording function is the same as that of the recording / reproducing apparatus. However, in the player apparatus, since the tracking control is generally assumed to be performed only for the embossed pit, the apparatus has only the tracking control function of the DPD method, not the tracking control function of the push-pull method. As a result, the unrecorded area cannot be accessed, and only data in the continuous recording area can be reproduced.

In general, when the outer periphery of layer 1 of a dual-layer disc is accessed as indicated by the arrow in FIG. 55A, the outer periphery of layer 1 is accessed after layer 1 is accessed following the access of layer 1. Thus, layer 1 can be accessed while checking the address of layer 1.

On the other hand, in the optical disk apparatus according to the present embodiment, in order to avoid passage of the unrecorded area of the layer 1, the step of accessing the layer 1 after accessing the outer circumference of the layer 0 is used, as shown in FIG. do. In this way, the optical disc according to the present embodiment checks the completion state of the disc based on the format information and the like. This disc has the function of using the access method shown in Fig. 55A when the disc is completed and using the access method shown in Fig. 55B when it is determined that the disc is not completed.

As described above, according to the embodiment of the present invention, a predetermined range at all of the end portions of the area of the layer 1 corresponding to the recorded area of the layer 0 is set to record the prohibited area. For this reason, even if a relative difference between actual spinning positions of the same design radius of layers 0 and 1 occurs due to manufacturing error or the like, the influence of crosstalk can be suppressed.

Since the test zone of layer 0 is arranged at a position separated from the relief management zone by the width of the interval (guard zone), crosstalk of the relief management zone can be avoided. The guard zone of layer 1 is wider than the sum of the width of the test zone and the management zone of layer 1 by the width of the gaps on both sides. The test zone of layer 1 is narrower than the guard zone of layer 0 by the gap on both sides. Thus, the state of another layer overlapping the test zone and the management zone is always constant, i.e., a recorded state or an unrecorded state. Thus, stable test writing or recording of management data can be performed.

While certain embodiments of the invention have been described, these embodiments have been presented as illustrative and are not intended to limit the scope of the invention. Indeed, the novel methods and systems described herein may be practiced in a variety of other formats, and various omissions, substitutions, and changes in the form of methods and systems described herein may be made without departing from the spirit of the invention. The accompanying claims and their equivalents are intended to cover such formats or modifications as would fall within the spirit and scope of the invention.

According to the present invention described above, it is possible to provide a recordable recording medium, an information recording apparatus, and an information recording method using the information recording medium in which the recording capacity can be increased without adversely affecting the properties of the recording film.

Claims (12)

A single-sided multilayer information recording medium having a recording layer, An emboss management zone, an internal recordable management zone, a data area, and an external recordable management zone are arranged in order from the inside of each of the recording layers, A burst-cutting area is arranged inside the relief management zone of any one of the recording layers, The number of the recording layers is two, The internal recordable management zone of each recording layer includes at least one test zone, management zone, and guard respect, Wherein the test zone and the management zone of one recording layer overlap the guard zone of another recording layer. delete The method of claim 1, The recording layer comprises a first layer and a second layer, The information recording medium is set to a drive such that the first layer is closer to the laser source than the second layer, A guard zone, a test zone, a management zone, and a format information zone are arranged in order from the inside of the internal recordable management zone of the first layer, And a test zone and a guard zone are arranged in order from the inside of the internal recordable management zone of the second layer. The method of claim 3, wherein The radial length of the guard zone of the first layer is determined based on the allowable value of the position difference between the end position on the outer end of the embossed management zones of the first layer and the second layer created by a manufacturing error, The inner end of the test zone of the second layer is disposed at a position shifted outward by the allowable value from the inner end of the guard zone of the first layer, And the outer end of the test zone of the second layer is disposed at a position shifted inward by the allowable value from the outer end of the guard zone of the first layer. The method of claim 1, The recording layer comprises a first layer and a second layer, The information recording medium is set to a drive such that the first layer is closer to the laser source than the second layer, A first guard zone, a test zone, and a second guard zone are arranged in order from the inside of the external recordable management zone of the first layer, And the first guard zone, the test zone, and the second guard zone are arranged in order from the inside of the external recordable management zone of the second layer. The method of claim 5, wherein The radial length of the first guard zone of the second layer is determined based on the allowable value of the position difference between the end position on the outer end of the first layer and the data regions of the second layer generated by a manufacturing error and , An inner end of the test zone of the first layer is disposed at a position shifted outward by the allowable value from an inner end of the second guard zone of the second layer, And the outer end of the test zone of the first layer is disposed at a position shifted inward by the allowable value from the outer end of the second guard zone of the second layer. The method of claim 1, And the management zone includes information indicating the recording state of the guard zone. The method of claim 1, The management zone includes information indicating a range of the data area, And the arrangement of the data area, the internal recordable management zone, and the external recordable management zone is changed by changing the information. An information recording apparatus for recording information on a single-sided multilayer information recording medium having a recording layer, An embossed management zone, an internal recordable management zone, a data area, and an external recordable management zone are arranged in order from the inside of each of the recording layers, The burst-cutting area is arranged inside an embossed management zone of any one of the recording layers, the number of the recording layers is two, and the internal recordable management zone of each recording layer is a test zone, a management zone, and a guard. Includes at least one respect, The test zone and the management zone of one recording layer overlap the guard zone of another recording layer, And the information recording apparatus includes a data recording unit for recording information in the data area. An information recording method for recording information on a single-sided multilayer information recording medium having a recording layer, An embossed management zone, an internal recordable management zone, a data area, and an external recordable management zone are arranged in order from the inside of each recording layer, The burst-cutting area is arranged inside an embossed management zone of any one of the recording layers, the number of the recording layers is two, and the internal recordable management zone of each recording layer is a test zone, a management zone, and a guard. Includes at least one respect, The test zone and the management zone of one recording layer overlap the guard zone of another recording layer, And the information recording method includes recording information in the data area. An information reproducing apparatus for reproducing information from a single-sided multilayer information recording medium having a recording layer, An embossed management zone, an internal recordable management zone, a data area, and an external recordable management zone are arranged in order from the inside of each of the recording layers, The burst-cutting area is arranged inside an embossed management zone of any one of the recording layers, the number of the recording layers is two, and the internal recordable management zone of each recording layer is a test zone, a management zone, and a guard. Includes at least one respect, The test zone and the management zone of one recording layer overlap the guard zone of another recording layer, And the information reproducing apparatus includes an information reproducing unit for reproducing information from the data area. An information reproducing method of reproducing information from a single-sided multilayer information recording medium having a recording layer, comprising: An embossed management zone, an internal recordable management zone, a data area, and an external recordable management zone are arranged in order from the inside of each of the recording layers, The burst-cutting area is arranged inside an embossed management zone of any one of the recording layers, the number of the recording layers is two, and the internal recordable management zone of each recording layer is a test zone, a management zone, and a guard. Includes at least one respect, The test zone and the management zone of one recording layer overlap the guard zone of another recording layer, And the information reproducing method comprises reproducing information from the data area.

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