JP2006313642A - Information recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable flexible operation depending on the data size or the like of user data which is recorded irrespective of a previously set range of an initial data area in a recording operation with respect to an information recording medium having a plurality of recording layers. <P>SOLUTION: Addresses A to B are used as a data area of a layer 0, a predetermined area following the address B is used as an intermediate area of the layer 0, a predetermined area after an address B' (toward the outer circumference) is used as an intermediate area of a layer 1, and addresses B' to A' are used as a data area of the layer 1. A and A', and B and B' have mutually inverted bits, and are located at the same radial position. Also, logical addresses are assigned to the address A to the address B of the layer 0 and the address B' to the address A' of the layer 1, and the logical addresses of the address B of the layer 0 and the address B' of the layer 1 are continuous. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a recordable information recording medium such as a dual-layer DVD + R (Digital Versatile Disc + Recordable).

  As recordable DVD discs, there are DVD + R which is a write-once DVD disc and DVD + RW which is a rewritable DVD disc. These discs are recordable DVD discs having high reproduction compatibility with single-sided single-layer reproduction-only DVD discs. Research and development for increasing the speed and capacity of such recordable discs has been actively conducted.

  One of them is a single-sided dual-layer DVD + R disc (hereinafter referred to as “double-layer DVD + R”) that has playback compatibility with a single-sided dual-layer read-only DVD disc. The dual-layer DVD + R has a recording capacity of 8.4 Gbytes, and the conventional single-layer DVD + R has a recording capacity almost double that of the data capacity of 4.7 Gbytes. The read-only DVD disc can be read by a DVD player or a DVD-ROM drive.

  Here, for a single-sided dual-layer read-only DVD disc, a parallel track path method (Parallel Track Path method = PTP method) in which the second layer tracks from the inner periphery to the outer periphery in the same manner as the first layer, There are two types of track systems, the opposite track path system (Opposite Track Path system = OPT system) in which the second layer tracks are directed from the outer periphery toward the inner periphery. In the PTP method, the first and second layer data areas start at the same radial position, and both start from the physical address 30000H. A lead-out area is arranged after the data area. In the OTP method, the radial position of the address where the data area of the second layer starts is equal to the radial position of the address where the data area of the first layer ends, and the physical address of the start position of the data area of the second layer is the data of the first layer. This is an address obtained by bit-inverting the area end address. When there is a difference in the size of the data area of the first layer and the second layer, the difference area becomes a lead-out area. For example, if the end address D1 of the first layer data area and the second area data area end address D2 are D1> D2 in the PTP disc, the difference area D1-D2 is a lead-out area. Thus, in the area where data is recorded in one recording layer, the data is also recorded in the corresponding area in the second layer. This is because, for example, when the user reproduces the first layer data, the data is recorded on the second layer at the same radial position when the second layer is read by chance and the laser is focused. This is to avoid the problem that the address information cannot be obtained unless it occurs, and that the first layer data cannot be reproduced as a result.

  In addition, the logical address in the second layer DVD is continuously allocated from the start address of the first layer data area, and the logical address continues from the first layer data area end address to the second layer data area start address. ing. That is, when reproducing from a dual-layer DVD, the user can perform reproduction without being aware of the recording layer by designating a reproduction area using a logical address.

  Next, a recording process when user data is recorded on a dual-layer DVD + R will be described. In the DVD + R, an initial data area (initial data area) is set in advance for the user to record data, and the same method as that of the read-only dual-layer DVD is performed over the entire range in the initial data area. A physical address has been allocated. When data is recorded on such a dual-layer DVD + R, the user designates a recording area using a logical address as in the reproduction process. For this reason, when the user continuously performs data recording, recording starts from the data area start address of the first layer, and when the recording is completed up to the data area end address of the first layer, the data area of the second layer continues. Recording starts from the start address. In this way, even in dual-layer DVD + R recording, the user can perform recording without being aware of the recording layer.

  For this reason, it is conceivable that the user's data recording ends in the middle of the second layer data area or without recording the second layer at all. For example, when the user data recording is completed in the middle of the second layer data area, that is, in the state where the unrecorded area exists in the second layer data area, the unrecorded area is set in the second layer data area. If left as it is, the disc layout is incompatible with the above-described reproduction-only dual-layer DVD disc. In addition, for example, when the user reproduces the first layer data, if the laser is inadvertently read by the seek to the target address, the data is recorded on the second layer at the same radius position. Otherwise, a problem such as failure to acquire address information occurs, resulting in a problem that the first layer data cannot be reproduced. Such a problem is the same when the user's data recording is terminated without recording the second layer at all.

  On the other hand, there is a case where such a dual-layer DVD + R is used as a trial writing before mass production of a read-only DVD disc. Usually, data recorded on a DVD or the like is often created on a hard disk. Thereafter, the data is recorded on an information recording medium that can be reproduced by a general player in order to verify whether the data is reproduced as intended by the creator. Since a small amount of information recording medium is used for the verification work, an information recording medium that can be recorded only once, such as a DVD + R, is often used. However, in the past, since there was no dual-layer recording disc, in the case of a read-only dual-layer DVD disc, it was not possible to test-write a recordable DVD disc for verification. Therefore, as disclosed in Patent Document 1, a read-only dual-layer DVD disc in which temporary file management information is arranged on the second layer has been proposed. In the verification process in Patent Document 1, trial writing is performed on a separate recording disk for each recording layer, and the recording data of the disk on which data on the second layer is recorded is referred to by temporary file information. .

As described above, the example of Patent Document 1 changes the file format of a read-only dual-layer DVD itself that is mass-produced, and in the verification process, records are recorded on two recordable DVD discs to verify the recorded data for each layer. Therefore, it is not possible to create and verify a disk having the same data structure as the reproduction-only DVD that is desired to be created. Further, in the verification according to the example of Patent Document 1, the data recorded in the second layer is verified from the file management information recorded in the first layer because the data recorded in the second layer is verified by the temporary file management information. Is impossible to verify.
JP 2000-048542 A

  First, in order to avoid the problem that the former unrecorded area is generated, it is considered that some processing is necessary for this unrecorded area. For example, the user is in a state where the second layer data area is almost unrecorded. When data recording is completed, or when user data is not recorded at all on the second layer and data recording is completed, the unrecorded area becomes large, and the corresponding processing takes a long time. The problem is derived.

  Further, regarding the latter verification and the like regarding the application example of the two-layer DVD + R, the above-described problem relating to the verification or the like can be solved when the dual-layer DVD + R is used in the verification process. In the DVD + R, an initial data area is set in advance for the user to record data, and in order to record in the completely same data format as the reproduction-only DVD to be created, any of the prepared initial data areas can be selected. However, no countermeasure has yet been proposed for this point.

  The object of the present invention is to enable flexible correspondence in accordance with the data size of user data to be recorded, regardless of the range of the preset initial data area, in the recording operation on the information recording medium having a plurality of recording layers. Is to do.

  The invention described in claim 1 is an information recording medium having a plurality of recording layers for recording information, each recording layer having address information, and the address information of the first recording layer is recorded This is characterized in that the bit information of the address information of the second recording layer at the same radial position as the generated radial position is inverted.

  According to such an information recording medium, it is possible to record data of a desired size on each recording layer while maintaining continuity of logical addresses.

  The invention described in Reference Example 1 is an information recording apparatus that performs recording on an information recording medium having a first recording layer and a second recording layer each having a data area for recording information. A data area change setting means for changing and setting a range, wherein the data area change setting means includes a data area of the first recording layer within a range of an initial data area preset in the information recording medium. , An intermediate area of the first recording layer whose start address is an address continuous with the data area end address of the first recording layer, and the data area end address of the first recording layer in the second recording layer. A data area of the second recording layer with the bit-inverted address as the data area start address, and an intermediate area of the second recording layer with the address continuous with the data area start address of the second recording layer as the end address And sets the and.

  For example, in an information recording medium such as a DVD + R, physical addresses are allocated to all areas of an initial data area set in advance, and logical addresses are uniquely determined for the areas specified by the physical addresses. The logical address is continuous from the data area end address in the reference first recording layer to the data area start address in the second recording layer. The user data recorded by the user also includes management data for managing the recording data. This management data is managed using a logical address as address information in which the substance of the user data is recorded. Therefore, when the user's recording data is divided into an arbitrary size and recorded on a plurality of recording layers, inconsistency occurs between the address information in the management data and the address information actually recorded. In order to avoid such a problem, among the initial data areas preset in the first recording layer, an area actually used for data recording is reset as a data area, and the subsequent areas are set as intermediate areas. In addition, the start address of the intermediate area of the first recording layer is set to an address continuous with the data area end address of the first recording layer. Further, the data area start address of the data area of the second recording layer is set to an address obtained by bit-inversion of the data area end address of the first recording layer, and the end address of the intermediate area of the second recording layer is set to the second address. The continuity of the logical address can be maintained by setting the address consecutive to the data area start address of the recording layer.

  The invention described in Reference Example 2 is an information recording apparatus that performs recording on an information recording medium having a first recording layer and a second recording layer each having a data area for recording information. A data area change setting means for changing and setting a range, wherein the data area change setting means includes a data area of the first recording layer within a range of an initial data area preset in the information recording medium. , Corresponding to the data area of the first recording layer, the intermediate area of the first recording layer starting from a position continuous with the end position of the data area of the first recording layer, and the second recording layer At a position corresponding to the data area of the second recording layer having the same radial position as the data area end position of the first recording layer and the intermediate area of the first recording layer. Continuous with the data area start position of the recording layer An intermediate area of the second recording layer positioned to the end position, and sets the.

  The invention described in Reference Example 5 is an information recording method for recording an information recording medium having a plurality of recording layers each having a data area for recording information, the initial data area being preset in the information recording medium A step of changing and setting the data area of the first recording layer within the range of, and a step of setting the data area start address of the second recording layer as a bit-inverted address of the data area end address of the first recording layer And changing and setting the intermediate area start address of the first recording layer so as to be an address continuous with the data area end address of the first recording layer; and the intermediate area end of the second recording layer And a step of changing and setting the address so as to be an address continuous with the data area start address of the second recording layer.

  The invention described in Reference Example 6 is an information recording method for recording an information recording medium having a plurality of recording layers each having a data area for recording information, the initial data area being preset in the information recording medium A step of changing and setting the data area of the first recording layer within the range of, and a step of setting the data area start position of the second recording layer to the same radial position as the data area end position of the first recording layer Changing and setting the intermediate region start position of the first recording layer to a position continuous with the data region end position of the first recording layer, and the intermediate region end position of the second recording layer, And a step of changing and setting to a position continuous with the data area start position of the second recording layer.

  According to the present invention, it is possible to record data of a desired size on each recording layer while maintaining continuity of logical addresses.

  According to the inventions described in Reference Examples 1, 2, 5 and 6, the range of the data area actually used for recording user data can be arbitrarily changed and set within the range of the initial data area set in advance. Yes, for example, if the total data size to be recorded by the user is known in advance, the entire initial data area is not used for data recording, but a part of the initial data area is set as the data area. By using it for data recording, it becomes possible to allocate the usage of the recording layer according to the total data size recorded by the user, omitting the time required for corresponding processing such as filling the unused area of the recording layer with predetermined data, Alternatively, it can be reduced, or recording in the same data format as the reproduction-only DVD to be created can be easily realized.

  An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of an optical disc apparatus 1 as an information recording apparatus according to the present embodiment.

  This optical disk device 1 includes a spindle motor 3 for rotating and driving an optical disk 2 as an information recording medium, an optical pickup device 4, a laser control circuit 5, a motor driver 6, a reproduction signal processing circuit 7, a servo controller 8, a buffer RAM 9, A buffer manager 10, an interface 11, a ROM 12, a CPU 13, a RAM 14, and the like are provided. Note that the arrows shown in FIG. 1 indicate the flow of typical signals and information, and do not represent the entire connection relationship of each block.

  More specifically, the optical disc 2 is an example applied to a case where a double-layer DVD + R conforming to the DVD + R standard is a recording target.

  The optical pickup device 4 includes a semiconductor laser as a light source, an objective lens that guides laser light emitted from the semiconductor laser to a recording surface of the optical disc 2 and guides return light reflected by the recording surface to a predetermined light receiving position. An optical system, a light receiver that is disposed at a light receiving position and receives return light, and a drive system (such as a focusing actuator, a tracking actuator, and a seek motor) (all not shown) are included. From the light receiver, a current (current signal) corresponding to the amount of received light is output to the reproduction signal processing circuit 7.

  The servo controller 8 generates a control signal for controlling the focusing actuator of the optical pickup device 4 based on the focus error signal, and generates a control signal for controlling the tracking actuator of the optical pickup device 4 based on the track error signal. These control signals are output from the servo controller 8 to the motor driver 6.

  The motor driver 6 drives the focusing actuator and tracking actuator of the optical pickup device 4 based on the control signal from the servo controller 8. Further, the motor driver 6 controls the spindle motor 3 based on an instruction from the CPU 13 so that the linear velocity of the optical disk 2 is constant. Further, the motor driver 6 drives a seek motor for the optical pickup device 4 based on an instruction from the CPU 13 to move the optical pickup device 4 in the radial direction toward the target track of the optical disc 2.

  The interface 11 is a bidirectional communication interface with a host (information processing apparatus) 21 such as a PC.

  The CPU 13 constitutes a microcomputer (computer) included in the optical disc apparatus 1 together with the ROM 12 and the RAM 14. The ROM 12 that also functions as a storage medium stores a program including an information recording program, which will be described later, written in a code readable by the CPU 13. The CPU 13 controls the operation of each unit described above according to a program stored in the ROM 12 and temporarily stores data necessary for control in the RAM 14. When the optical disk device 1 is powered on, the program stored in the ROM 12 is loaded (installed) into the main memory (not shown) of the CPU 13.

  Here, the optical disk apparatus 1 of the present embodiment is connected to a host 21 to constitute an information processing system 22.

  The present embodiment is characterized in the recording processing control when a double-layer DVD + R, which is the target optical disc 2, is mounted on the optical disc apparatus 1 and there is a user data recording request from the host 21 side. Prior to this, the layout of a read-only DVD disc, which is the premise of the DVD + R standard, will be described.

  First, FIG. 2 shows a layout example of a read-only DVD disc. 2A shows a single-layer single-layer disc (hereinafter referred to as “single-layer disc”), and FIG. 2B shows a PTP single-sided dual-layer disc (hereinafter referred to as “PTP disc”). FIG. 2C shows the case of an OTP single-sided dual-layer disc (hereinafter referred to as “OTP disc”).

  A DVD disc basically has an information area (information area) composed of a lead-in area, a data area, and a lead-out area. In the case of a single-layer disc and a PTP disc Has an information area for each recording layer. The OTP disc is composed of one information area, and has an intermediate area (Middle Area) behind the data area of each recording layer. Layers 0 and 1 of the single-layer disc and the PTP disc and layer 0 of the OTP disc reproduce data from the inner periphery to the outer periphery, and layer 1 of the OTP disc reproduces data from the outer periphery to the inner periphery. Is called. Each recording layer of the single-layer disc and the PTP disc is assigned a physical address (Physical Sector Number) continuous from the lead-in area to the lead-out area. On the other hand, in the case of an OTP disk, a continuous physical address is allocated from the lead-in area to the intermediate area of layer 0, but the physical address of layer 1 is assigned an address obtained by bit-inversion of the physical address of layer 0, and from the intermediate area The physical address increases to the lead-out area. That is, the start address of the data area in layer 1 is an address obtained by bit-inverting the end address in layer 0.

  As shown in FIG. 2B, the lead-in area start and end addresses, the data area start address, and the lead-out area end address in the PTP disk are at the same radial position, and the lead-out area start address, The end address of the data area may be different for each recording layer. When the end address of the data area is different, a lead-out is recorded in the difference area.

  On the other hand, as shown in FIG. 2C, in the case of an OTP disc, the start address of the lead-in area and the end address of the lead-out area, the data area end address of layer 0 and the data area start address of layer 1, The start and end addresses of the intermediate area of the recording layer are at the same radial position, and the data area start address of layer 0 and the data area end address of layer 1 do not necessarily match. In the case of an OTP disc, a lead-out is recorded in the difference area.

  Here, prior to the description of the characteristic part of the present embodiment, for example, a corresponding processing example for an unrecorded area that may occur in a dual-layer DVD + R (optical disc 2) will be described with reference to FIGS. 3 and 4. FIG. First, an example of processing for handling an unrecorded area for a dual-layer DVD + R (optical disc 2) based on the PTP method, for example, which conforms to the layout of a read-only DVD disc will be described with reference to FIG.

  First, FIG. 3A shows a layout of a dual-layer DVD + R in an unrecorded state where no recording is performed. Each recording layer consisting of layer 0 as the first recording layer and layer 1 as the second recording layer has a lead-in area, a data area (Data Area), and a lead-out area. In the figure, A is the lead-in start address, B is the start address of the data area, C is the start address of the lead-out area, D is the position of the end address of the lead-out area, and each recording layer (layer 0, 1 ) Are located at the same radial position of the optical disc 2.

  FIGS. 3B to 3B show an example of processing to be performed when user data recording is completed in the middle of the layer 1. FIG. 3B shows that the user data recording is completed at the address X of the second layer (layer 1).

  Thus, when the recording of user data is completed in the middle, in one corresponding processing example, as shown in FIG. 3 (b-1), an unrecorded area after the user data recording area is recorded as a lead-out. That is, the area from the address X to the address D of the layer 1 is recorded as predetermined unrecorded area with predetermined data = readout. Therefore, in the case of layer 0, addresses A to B are lead-in areas, addresses B to C are data areas, and addresses C to D are lead-out areas, whereas in layer 1, addresses A to B are lead-in areas. Areas, addresses B to X are data areas, and addresses X to D are lead-out areas. As a result, the disc layout is the same as that of a single-sided dual-layer read-only DVD-ROM. Even if user data recording is completed in the middle of the second-layer (layer 1) data area, there is no problem and single-sided dual-layer read-only. Compatibility with the DVD-ROM can be maintained.

  Further, when the recording of user data is completed halfway, in another example of the corresponding processing, as shown in FIG. 3 (b-2), the user data in the data area of the second recording layer (layer 1). Dummy data having a data attribute (Dummy Data), for example, all 0 data is recorded in the area excluding the recorded user data recording area. That is, the area from the address X to the address C of the layer 1 is recorded as a predetermined unrecorded area with dummy data having predetermined data = data attribute. At this time, the lead-out may be recorded in the lead-out area of layer 1 (addresses C to D). Accordingly, in both layers 0 and 1, addresses A to B are lead-in areas, addresses B to C are data areas, and addresses C to D are lead-out areas. As a result, the disc layout is the same as that of the single-sided dual-layer read-only DVD-ROM, and even when user data recording is completed in the middle of the second-layer (layer 1) data area, there is no problem and single-sided dual-layer read-only. Compatibility with the DVD-ROM can be maintained.

  Next, a description will be given of an example of processing for a double-layer DVD + R (optical disc 2) based on, for example, the OTP method, which complies with the layout of the read-only DVD disc, with reference to FIG.

  First, FIG. 4A shows a layout of a dual-layer DVD + R in an unrecorded state where no recording is performed. Layer 0, which is the first recording layer, has a lead-in area, a data area, and an intermediate area from the inner periphery of the disk, and layer 1 has an intermediate area, a data area, and a lead-out area from the outer periphery of the disk. In the figure, A is the start address of the lead-in area, B is the start address of the data area of layer 0, C is the start address of the intermediate area of layer 0, D is the end address of the intermediate area of layer 0, D 'indicates the start address of the intermediate area of layer 1, C' indicates the start address of the data area of layer 1, B 'indicates the start address of the lead-out area, and A' indicates the position of the end address of the lead-out area. A and A ′, B and B ′, C and C ′, and D and D ′ are bit-inverted values, and are located at the same radial position on the optical disc 2.

  FIGS. 4B to 4B show examples of corresponding processing when user data recording is completed in the middle of the layer 1. FIG. 4B shows that the user data recording is completed at the address X in the second layer (layer 1).

  Thus, when the recording of user data is completed in the middle, in one corresponding processing example, as shown in FIG. 4 (b-1), an unrecorded area after the user data recording area is recorded as a lead-out. That is, the area from address X to address A ′ is recorded as predetermined unrecorded area with predetermined data = lead-out. Therefore, addresses A to B are lead-in areas, addresses B to C are layer 0 data areas, addresses C to D are layer 0 intermediate areas, addresses D 'to C' are layer 1 intermediate areas, addresses C ′ to X are the layer 1 data area, and addresses X to A ′ are the lead-out area. As a result, the disc layout is the same as that of the single-sided dual-layer read-only DVD-ROM, and even when user data recording is completed in the middle of the second-layer (layer 1) data area, there is no problem and single-sided dual-layer read-only. Compatibility with a DVD-ROM can be maintained.

  Further, when the recording of user data is completed in the middle, in another example of corresponding processing, as shown in FIG. 4 (b-2), as shown in FIG. 4 (b-2), the user is in the data area of the second recording layer (layer 1). Dummy data having a data attribute (Dummy Data), for example, all 0 data is recorded in an area excluding the user data recording area where data recording has been performed. That is, the area from address X to address B ′ is recorded as predetermined unrecorded area with predetermined data = dummy data having a data attribute. At this time, the lead-out may be recorded in the lead-out area (addresses B ′ to A ′). Therefore, addresses A to B are lead-in areas, addresses B to C are layer 0 data areas, addresses C to D are layer 0 intermediate areas, addresses D 'to C' are layer 1 intermediate areas, addresses C ′ to B ′ is the data area of layer 1 and addresses B ′ to A ′ are the lead-out area. As a result, the disc layout is the same as that of a single-sided dual-layer read-only DVD-ROM, and even when user data recording is completed in the middle of the second-layer (layer 1) data area, the single-sided dual-layer read-only DVD-ROM It becomes possible to maintain compatibility with.

  As shown in these corresponding processing examples, if an unrecorded area existing in the data area is recorded with predetermined data, for example, predetermined data such as lead-out or dummy data having a data attribute, the data area Even when the user's data recording is completed on the way, it is possible to solve the problem caused by the remaining unrecorded area. For example, the data area of the second recording layer (layer 1) is almost unrecorded. When recording of user data is completed, or when data recording is completed without any user data being recorded on the second recording layer (layer 1), the data area of the second recording layer (layer 1) is recorded. It becomes necessary to fill all existing unrecorded areas with these predetermined data, and this leads to a problem that it takes a long time to fill the unrecorded areas.

  In such a case, if the total data size recorded by the user is known in advance, the entire data area of the first recording layer (layer 0) is not used for data recording. The user data is divided and recorded so that the data size to be recorded on the layer (layer 0) and the second recording layer (layer 1) is substantially equal, so that the unrecorded area is substantially eliminated and the unrecorded area is not recorded. Although it is possible to save the time required for the process of filling the area with predetermined data, it is difficult to implement simply by dividing the data for the following reasons.

  That is, as described above, in DVD + R, physical addresses are allocated to all areas of the initial data area prepared in advance, and logical addresses are uniquely determined for the areas specified by the physical addresses. Further, the logical address is continuous from the data area end address in the first recording layer (layer 0) to the data area start address in the second recording layer (layer 1). The data recorded by the user also includes management data for managing the recording data. This management data is managed using a logical address as address information in which the substance of the user data is recorded. Therefore, when the user's recording data is simply divided into arbitrary sizes and recorded on the plurality of recording layers, inconsistency between the address information in the management data and the address information actually recorded occurs. . In order to avoid such a problem, among the initial data areas set in advance in the first recording layer (layer 0), the area actually used for data recording is changed and set as the data area. The area is set as a lead-out area or an intermediate area, and the data area of the second recording layer (layer 1) is set to an area corresponding to the same radial position as the data area of the first recording layer (layer 0). Although it is necessary to maintain the continuity of logical addresses, there is no such setting means at present, and the present invention provides such setting means.

  That is, in the present embodiment, the area actually used for data recording can be changed and set as the data area within the range of the initial data area set in advance. This will be described with reference to FIG. In this example, a desired data area is set based on address designation of the host 21 within a range of an initial data area set in advance in the first recording layer (layer 0).

  FIGS. 5A to 5A show examples of recording on a dual-layer DVD + R by the PTP method. FIG. 5A shows a layout of a dual-layer DVD + R in an unrecorded state. That is, each of the recording layers of layer 0 and layer 1 has a lead-in area (Lead-in Area), an initial data area (Data Area (Initial)), and a lead-out area (Lead-out Area).

  In such an unrecorded state, as shown in FIG. 5A, it is assumed that the end address = B of the data area of the first recording layer (layer 0) is designated from the host 21 to the optical disc apparatus 1. (Data area change designation means) (A is the start address). At this time, as shown in FIG. 5 (a-1), the optical disc apparatus 1 receives such address designation, and addresses A to B of layer 0 and layer 1 are data areas, and a predetermined area following address B is designated. The information is set in a lead-out area (Lead-out Area), and information on such a data area is recorded in an SDCB area (session disk control block) in the lead-in area (the SDCB area will be described later).

  That is, the range of the data area of layer 1 is also determined by determining the change of the data area of layer 0 as the reference. The logical addresses are assigned to layer 0 addresses A to B and layer 1 addresses A to B. The logical addresses of layer 0 address B and layer 1 address A are continuous.

  Next, as shown in FIG. 5A-2, when the user data recording request is received from the host 21, the user data is recorded from the address A of layer 0, and when the recording to the address B is completed. Recording continues from address A of layer 1. That is, it is possible to record data of a desired size on each recording layer (layer 0, 1) while maintaining continuity of logical addresses.

  In the present embodiment, FIG. 5 (a-2) shows an open session state. Therefore, in the event that recording of user data is finally completed and compatibility with a read-only dual-layer DVD disc is desired, and there is an unrecorded area in layer 1, an explanation will be given with reference to FIG. According to the corresponding processing example, predetermined data such as lead-out and dummy data is recorded in the unrecorded area, and finally, the lead-out is recorded to be a closed session. Even when data embedding processing is required for such an unrecorded area, the layer 0 is not changed to the initial data area but is changed to the desired data area size, and the size of the generated unrecorded area is small. Therefore, the processing time can be shortened. In addition, it is possible to easily realize recording in the same data format (format according to the size of the first layer of the original disc) as the reproduction-only DVD to be created by changing the data area in response to such address designation. I understand.

  FIGS. 5B to 5B show examples of recording on a dual-layer DVD + R by the OTP method. FIG. 5B shows a layout of a dual-layer DVD + R in an unrecorded state. That is, layer 0 includes a lead-in area (lead-in area), an initial data area (data area (initial)), and an intermediate area (middle area) from the inner periphery of the disk, and layer 1 includes an intermediate area from the outer periphery of the disk. (Middle Area), an initial data area (Data Area (Initial)), and a lead-out area (Lead-out Area).

  In such an unrecorded state, as shown in FIG. 5B, it is assumed that the end address = B of the data area of the first recording layer (layer 0) is designated from the host 21 to the optical disc apparatus 1. (Data area change designation means). At this time, as shown in FIG. 5 (b-1), the optical disc apparatus 1 receives such address designation, and addresses A to B are layer 0 data areas, and a predetermined area following address B is layer 0. The intermediate area, a predetermined area after the address B ′ (peripheral direction) is changed to the intermediate area of the layer 1 and the addresses B ′ to A ′ are changed to the data area of the layer 1, and further, information on the data area is stored in the lead-in area. Record in the SDCB area. Here, A and A ′, B and B ′ are values obtained by bit inversion, and are located at the same radial position. That is, the range of the data area of layer 1 is determined by determining the data area of layer 0 as a reference. The logical addresses are assigned to layer 0 addresses A to B and layer 1 addresses B ′ to A ′. The logical addresses of layer 0 address B and layer 1 address B ′ are continuous.

  Next, as shown in FIG. 5B-2, when a recording request for user data is received from the host 21, recording is performed from the address A of layer 0, and when the recording to the address B is completed, layer 1 is recorded. Recording is continued from the address B '. That is, it is possible to record data of a desired size on each recording layer (layer 0, 1) while maintaining continuity of logical addresses. In this case, the same effect as in the case of FIGS. 5A to 5A can be obtained.

  Next, the principle of another embodiment will be described with reference to FIG. In this example, the setting is made based on the designation of the size of the desired data area from the host 21 within the range of the initial data area set in advance in the first recording layer (layer 0). In this embodiment, it is assumed that the data area is changed and set by the size specified from the start address of the data area.

  6A to 6A show examples of recording on a dual-layer DVD + R by the PTP method. As shown in FIG. 6A, it is assumed that the size of the data area of layer 0 = C is designated from the host 21 (data area change designation means). At this time, as shown in FIG. 6 (a-1), the optical disc apparatus 1 uses (A + C) from the address A of layer 0 and layer 1 (A is the start address of the data area) to the data area, and (A + C) and thereafter. A predetermined area is set as a lead-out area, and information on such a data area is recorded in an SDCB area in the lead-in area. That is, when the change of the data area of layer 0 is determined, the range of the data area of layer 1 is also determined. Also, logical addresses are assigned to layer A addresses A to (A + C) and layer 1 addresses A to (A + C). The logical addresses of layer 0 address (A + C) and layer 1 address A are continuous. .

  Next, as shown in FIG. 6A-2, when a user data recording request is received from the host 21, recording is performed from the address A of layer 0, and when the recording is completed up to the address (A + C), Recording continues from address A of layer 1. That is, it is possible to record data of a desired size on each recording layer (layer 0, 1) while maintaining continuity of logical addresses. In this case, the same effect as in the case of FIGS. 5A to 5A can be obtained.

  FIGS. 6B to 6B-2 show examples of recording on a dual-layer DVD + R by the OTP method. In the unrecorded state, as shown in FIG. 6B, the size of the data area of the first recording layer (layer 0) = C is designated from the host 21 to the optical disc apparatus 1 (data area). Change designation means). At this time, as shown in FIG. 6 (b-1), the optical disc apparatus 1 assigns (A + C) from the address A (A is the start address of the data area) to the data area of layer 0, and the predetermined area after (A + C). The intermediate area of layer 0, the predetermined area after (A + C) ′ is set as the intermediate area of layer 1, and the data area from (A + C) ′ to A ′ is set as the data area of layer 1, and further information on such data area is read. Recording is made in the SDCB area in the in area. Here, A and A ′, B and B ′ are values obtained by bit inversion, and are located at the same radial position. That is, the range of the data area of layer 1 is determined by determining the data area of layer 0 as a reference. Logical addresses are assigned to layer 0 addresses A to (A + C) and layer 1 addresses (A + C) ′ to A ′. Layer 0 address (A + C) and layer 1 address (A + C) ′ are logical addresses. Is continuous.

  Next, as shown in FIG. 6B-2, when a recording request for user data is received from the host 21, recording is performed from the address A of layer 0, and when the recording is completed up to the address (A + C), Recording continues from the address (A + C) ′ of layer 1. That is, it is possible to record data of a desired size on each recording layer (layer 0, 1) while maintaining continuity of logical addresses. In this case, the same effect as in the case of FIGS. 5A to 5A can be obtained.

  The principle of still another embodiment will be described with reference to FIG. This example is an application example in the case where a data recorded area is changed and set as a data area in the initial data area preset in the first recording layer (layer 0). Here, it is assumed that the recorded area at the time of receiving the designation of the data recording completion notification to the first recording layer (layer 0) from the host 21 is set as the data area.

  FIGS. 7A to 7A show examples of recording on a dual-layer DVD + R by the PTP method. In FIG. 7A, it is assumed that a recording completion notification is received from the host 21 to the first recording layer (layer 0) when data recording is performed from addresses A to D (data area change designating means). At this time, as shown in FIG. 7 (a-1), the optical disc apparatus 1 sets the addresses A to D of the layer 0 and the layer 1 as the data area, the predetermined area after the address D as the lead-out area, Information regarding these data areas is recorded in the SDCB area in the lead-in area.

  That is, the range of the data area of layer 1 is also determined by determining the change of the data area of layer 0 as the reference. The logical addresses are assigned to layer 0 addresses A to D and layer 1 addresses A to D, and the logical address is continuous between layer 0 address D and layer 1 address A.

  Next, as illustrated in FIG. 7A-2, when a user data recording request is continuously received from the host 21, recording is continuously performed from the address A of layer 1. That is, it is possible to record data of a desired size on each recording layer (layer 0, 1) while maintaining continuity of logical addresses. In this case, the same effect as in the case of FIGS. 5A to 5A can be obtained.

  FIGS. 7B to 7B show examples of recording on a dual-layer DVD + R by the OTP method. In FIG. 7B, it is assumed that a recording completion notification is received from the host 21 to the first recording layer (layer 0) when data recording is performed from addresses A to D (data area change designation means). At this time, as shown in FIG. 7 (b-1), the optical disc apparatus 1 has A to D as the data area of layer 0, the predetermined area after D as the intermediate area of layer 0, and after D '(peripheral direction). The predetermined area is changed to the intermediate area of layer 1, D ′ to A ′ are changed to the data area of layer 1, and information on these data areas is recorded in the SDCB area in the lead-in area. Here, A and A ′ and D and D ′ are values obtained by bit inversion, and are located at the same radial position.

  That is, when the change of the data area of layer 0 is determined, the range of the data area of layer 1 is also determined. The logical addresses are assigned to layer 0 addresses A to D and layer 1 addresses D ′ to A ′. The logical addresses of layer 0 address D and layer 1 address D ′ are continuous.

  Next, as shown in FIG. 7B-2, when a user data recording request is continuously received from the host 21, recording is continued from the layer 1 address D '. That is, it is possible to record data of a desired size on each recording layer (layer 0, 1) while maintaining continuity of logical addresses. In this case, the same effect as in the case of FIGS. 5A to 5A can be obtained.

By the way, the SDCB (Session Disc Control Block) in which management information related to data recording is recorded in the lead-in area will be described. DVD + R employs multitrack (referred to as fragment in DVD + R) and multi-session recording, and fragment information in each session is recorded in the SDCB area in the lead-in of the session.
FIG. 8 shows an example of such SDCB format. As shown in FIG. 8, the SDCB includes descriptions such as “Contents Descriptor”, “Unknown Content Descriptor Actions”, “Drive ID”, “Session Number”, and 16-byte specific information. There are a plurality (0 to N) of “Session Items”.

  There are two types of such “Session Items (session items)”: Fragment Items indicating fragment information in the session, and Previous Session Items indicating session information before the session. FIG. 9 shows a format example of “Fragment Item”. In the "Fragment Item" format, fragment information such as "Fragment number (fragment number)", "Fragment start address (fragment start address)", "Fragment end address (fragment end address)" is described as management information. Is set to Such “Fragment Item” is prepared as one of “Session Item” for each fragment existing in the session.

  FIG. 10 shows a format example of “Previous Session Item”. During the format of “Previous Session Item”, “Previous session number (previous session number)” “Previous session start address (previous start address of the previous session)” “Previous session end address (previous session end address) ) ”Or the like is set to be described as management information.

  FIG. 11 shows an example of storing information related to the data area according to the present embodiment. In the present embodiment, a “layer item (Layer Item)” as shown in FIG. 11 is newly added to the session item in SDCB. Among these, a layer item descriptor is an ID indicating that this recording information represents a layer item, and is recorded as “LYR”. The layer number indicates the layer number, and the layer start address and the layer end address indicate the start address and end address of the data area in each of the layers 0 and 1. This address information is also recorded when the change is set as shown in FIG. Therefore, even if the optical disk 2 is ejected after setting the data area, information on such a data area is recorded in the layer item (Layer Item) in the SDCB at the time of the change setting. Even if 2 is discharged, it will not be a problem.

  By the way, an example of processing control executed by the CPU 13 regarding the data area change setting as exemplified in FIG. 5 or FIG. 6 will be described with reference to a schematic flowchart shown in FIG. In this example, prior to the user data recording operation, a change in the data area is set in response to a data area change designation from the host 21.

  When the processing is started (step S1), it is checked whether or not the host 21 has designated to change the data area for the first recording layer (layer 0) (S2). If there is a data area change designation (Y in S2), information on the range of the data area (for example, the address designation information and size designation information described above) is acquired (S3), and the data area is selected based on the designation information. Change setting is performed (S4), and SDCB including information on these data areas is updated and recorded (S5). The processes of Y, S3, S4, and S5 in step S2 are executed as a data area change setting unit, a data area change specifying step, or a data area change setting function.

  That is, the information acquired in step S3 is the end address of the data area in the case of FIG. 5, and the size of the data area in the case of FIG. In addition, when information about the range of these data areas is acquired, the specified range is changed and set as the data area in the first recording layer (layer 0), and the lead-out area or intermediate area is set after the data area. To do. As a result, the range of the data area and the position of the lead-out area or the intermediate area in the second recording layer (layer 1) are determined.

  After that, it waits for a user data recording request from the host 21 (S6). When a data recording request is received (Y in S6), the requested user data is recorded in the data area of layer 0 (S7). Next, it is determined whether or not recording has been completed in all the data areas changed and set in step S4 (S8). If there is an unrecorded data area remaining in layer 0 (N in S8), the host is again set. It waits for a user data recording request from 21 (S6).

  On the other hand, when there is no unrecorded area in the data area of layer 0 (Y in S8), recording is continued in the data area of layer 1. Here, it waits for a recording request from the host 21 (S9), and when a data recording request is received (Y in S9), the requested data is recorded in the data area of the layer 1 (S10), and the data from the host 21 again. Wait for a recording request (S9). The processes of Y, S9, and S10 in step S8 are executed as a recording processing unit or a recording processing function.

  On the other hand, if there is no data recording request (N in S9), it is determined whether or not the recording request from the host 21 is completed (S11). If the data recording request has not been completed (N in S11), the data recording request is waited again (S9). If the data recording request has been completed (Y in S11), the process is terminated (S12).

  In this processing example, the recording timing of the lead-in area, the lead-out area, and the intermediate area excluding SDCB is not particularly considered, and recording may be performed at an arbitrary timing.

  Further, an example of processing control executed by the CPU 13 with respect to the data area change setting as exemplified in FIG. 7 will be described with reference to a schematic flowchart shown in FIG. This example is set in advance when the host 21 receives a data recording completion notification to the first recording layer (layer 0) during the recording operation to the first recording layer (layer 0). In the initial data area, the recorded area is set as the data area for change setting.

  When the process is started (S21), it waits for a user data recording request from the host 21 (S22). When a user data recording request is received (Y in S22), the requested data is transferred to the layer 0 data area (initial data). Area) (S23). Next, it is determined whether or not recording has been completed in the entire data area of layer 0 (S24). If recording on layer 0 is completed (Y in S24), the process proceeds to recording on layer 1 in succession.

  On the other hand, when the recording to the layer 0 is not completed (N in S24), it is determined whether or not the data recording completion notification to the first recording layer (here, layer 0) is received from the host 21 ( If a completion notification has been received (Y in S25), the data area of layer 0 is changed and set (S26), and SDCB including information relating to this data area is recorded (S27). The processes of Y, S26, and S27 in step S25 are executed as a data area change setting unit, a data area change specifying step, or a data area change setting function.

  That is, when the completion notification is received in layer 0, the recorded area is changed and set as the data area, and the lead-out area or the intermediate area is set subsequent to the data area. As a result, the range of the data area and the position of the lead-out area or the intermediate area in the second recording layer (layer 1) are determined.

  On the other hand, if the layer 0 data recording completion notification has not been received (N in S25), it waits for a data recording request from the host 21 again (S22).

  If the layer 0 data area is changed and set in step S26, recording is continued in the layer 1 data area. Here, the recording request from the user is waited (S28), and when the data recording request is received (Y in S28), the requested data is recorded in the data area of layer 1 (S29), and the data from the host 21 is again transmitted. Wait for a recording request (S28). The processes in steps S28 and S29 are executed as a recording processing unit or a recording processing function.

  On the other hand, when there is no data recording request (N in S28), it is determined whether or not the recording request from the host 21 is completed (S30). If the data recording request has not been completed (N in S30), it waits again for a data recording request from the host 21 (S28). If the data recording request has been completed (Y in S30), the process ends. (S31).

  In this processing example, the recording timing of the lead-in area, the lead-out area, and the intermediate area excluding SDCB is not particularly considered, and recording may be performed at an arbitrary timing.

  In the above description, the case where the second recording layer is a single layer has been described. However, the present invention can be similarly applied even when the second recording layer is a plurality of recording layers.

In the present embodiment, the information recording medium is described as an application example when the information recording medium is a dual-layer DVD + R. However, the present invention is not limited to the dual-layer DVD + R, and a plurality of data areas each recording user data are provided. In the case of an information recording medium having a recording layer and having a first recording layer serving as a reference for determining the range of the data area in each recording layer, and a second recording layer excluding the first recording layer If so, the same can be applied. Further, the present invention is not limited to the + R format, and can be applied to an information recording medium such as a + RW format and a -R / RW format.
Further, in the present embodiment, the system configuration example in which the optical disc apparatus (information recording apparatus) 1 and the host (information processing apparatus) 22 are completely separated has been described, but the information processing apparatus is provided inside the information recording apparatus. The same applies to the recorder type.

1 is a block diagram showing a schematic configuration of an optical disc device and an information processing system according to an embodiment of the present invention. It is explanatory drawing which shows the example of a layout of a reproduction-only DVD disc. It is explanatory drawing which shows typically the corresponding processing example of the unrecorded area | region with respect to 2 layer DVD + R by a PTP system. It is explanatory drawing which shows typically the corresponding processing example of the unrecorded area | region with respect to 2 layer DVD + R by an OTP system. It is a schematic diagram which shows the principle of one embodiment of the change setting of a data area. It is a schematic diagram which shows the principle of other embodiment of the change setting of a data area. It is a schematic diagram which shows the principle of further another embodiment of the change setting of a data area. It is explanatory drawing which shows the example of a format of SDCB. It is explanatory drawing which shows the example of a format of "Fragment Item". It is explanatory drawing which shows the example of a format of "Previous Session Item". It is explanatory drawing which shows the example of a format of "Layer Item". It is a schematic flowchart which shows the example of a process control of the change setting of a data area. It is a schematic flowchart which shows the other process control example of the change setting of a data area.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Information recording device 2 Information recording medium 21 Information processing apparatus

Claims (1)

An information recording medium having a plurality of recording layers for recording information,
Each recording layer has address information,
An information recording medium characterized in that the address information of the first recording layer is bit inversion of the address information of the second recording layer at the same radial position as the recorded radial position.

Images