JP4343936B2 - Information recording method, information recording apparatus, information recording program, and recording medium - Google Patents

Description

  The present invention relates to an information recording method, an information recording apparatus, an information recording program, and a recording medium for recording information on 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, the 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 methods, the opposite track path method (Opposite Track Path method = OPT method) in which the second layer track is 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. Further, a lead-out area is arranged after the data area. In the OTP method, the radial position of the address where the second layer data area starts is equal to the radial position of the address where the first layer data area ends, and the physical address of the second layer data area start position is the first layer data area. The end address is a bit-inverted 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 for avoiding a problem that the address information cannot be acquired 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.

  On the other hand, when data recording is performed using 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.

  An object of the present invention is to provide a read-only information recording medium due to the fact that recording is completed in the middle of the data area of a recording layer and an unrecorded area is generated in a recording operation on an information recording medium having a plurality of recording layers. It is possible to avoid the loss of compatibility with and to maintain the compatibility.

The present invention has two recording layers each having a data area for recording user data . In the opposite track path method, the first recording layer is directed from the inner periphery to the outer periphery, and the second recording layer is disposed from the outer periphery to the inner periphery. An information recording apparatus for recording data on an optical disc on which the user data is recorded toward the periphery, wherein the user data is recorded to a predetermined position inside an initially set data area of the first recording layer. If so, the lead-out data is recorded from the position having the address of the second recording layer having the bit inversion relationship with the address of the predetermined position .

  According to the present invention, the predetermined data is recorded in the predetermined unrecorded area in the second recording layer after the data recording accompanying the user data recording request is completed. Even when the recording is completed, since a predetermined unrecorded area is filled with data, compatibility with a read-only information recording medium having a plurality of recording layers can be maintained.

  Further, the present invention can be suitably applied to an information recording medium conforming to the DVD + R standard in which the existence of an unrecorded area causes a problem in compatibility with a read-only information recording medium having a plurality of recording layers. .

  It should be noted that, as the predetermined data filling the predetermined unrecorded area, it can be easily realized by expanding the lead-out that is originally recorded after the data area. Easily realized by filling all the unrecorded areas with this lead-out until it reaches the lead-out area used for the original purpose to define the end address. can do.

  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 (for example, a PC) that is an external device.

  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 recording medium stores a program including an information recording program described later written in a code decodable 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.

  In the present embodiment, there is a feature 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 side. 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 is a single-layer disc (hereinafter referred to as “single-layer disc”), and FIG. 2B is a single-layer 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 consisting 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 a 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 continuous physical address (Physical Sector Number) 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.

  An information recording method according to the present embodiment for a dual-layer DVD + R (optical disc 2) based on, for example, the PTP method, conforming to the layout of such 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-2 show a recording method according to the embodiment of the present invention when user data recording is completed in the middle of layer 1. FIG. 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 embodiment, 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 the user data is completed in the middle, in another embodiment, as shown in FIG. 3B-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 user data recording area where recording is performed. 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 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, FIGS. 3C to 3C show a recording method according to the embodiment of the present invention when user data recording is completed in the middle of layer 0. FIG. FIG. 3C shows that the recording of the user data is completed at the address Y of layer 0. When the recording of user data is completed during the recording of the first layer (layer 0), the lead-out area is an area from Y to E in the figure. As a result, the data area of layer 1 is from B to Y, and the lead-out area is from Y to E. That is, layer 0 is a recording layer that serves as a reference for determining the range of the data area, and by determining the data area of layer 0, the range of the data area of layer 1 is determined.

  When the recording of user data is completed in this way, in one embodiment, as shown in FIG. 3C-1, an unrecorded area after the user data recording area is recorded in a lead-out. In this example, since no user data is recorded in the data area of layer 1, the area from the start address B to the address E of the data area of layer 1 is set as a predetermined unrecorded area and predetermined data = lead-out. Record. Therefore, in the case of layer 0, addresses A to B are lead-in areas, addresses B to Y are data areas, and addresses Y to E are lead-out areas, whereas in layer 1, addresses A to B are lead-in areas. Areas, addresses B to E, become lead-out areas. As a result, even when the user data recording is completed without recording the user data in the layer 1, the data is recorded as a lead-out. Therefore, when the first layer (layer 0) data is reproduced, When the read laser is focused on the second layer (layer 1) by seek, the user data is not recorded on the second layer at the same radius and the first layer data cannot be reproduced. It can be avoided.

  FIG. 3C-2 shows another embodiment of the present invention, in which dummy data having a user data attribute and lead-out are recorded in a predetermined unrecorded area. As shown in FIG. 3 (c-2), when no user data is recorded on the second layer, a lead-out is recorded after a part of the unrecorded area is recorded with dummy data of the user data attribute. Also good. Here, when the dummy data having the user data attribute is recorded up to the address F, the lead-out is recorded from the addresses F to E. Therefore, in the case of layer 0, addresses A to B are lead-in areas, addresses B to Y are data areas, and addresses Y to E are lead-out areas, whereas in layer 1, addresses A to B are lead-in areas. Areas, addresses B to F are data areas, and addresses F to E 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, and compatibility with the dual-layer DVD-R (PTP) is maintained even when user data recording is completed in the middle of the second-layer data area. Is possible.

  Further, when the recording of user data is completed in this way, in yet another embodiment, as shown in FIG. 3 (c-3), the user data is recorded in the data area of the recording layer. Recording is performed with dummy data having a data attribute in areas other than the user data recording area. In this example, since no user data is recorded in the data area of layer 1, the area from the start address B to address Y of the data area of layer 1 is a predetermined unrecorded area, and predetermined data = dummy data having a data attribute Is recorded. At this time, the lead-out may be recorded in the lead-out area of layer 1 (addresses Y to E). Accordingly, in both layers 0 and 1, addresses A to B are lead-in areas, addresses B to Y are data areas, and addresses Y to E 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, and compatibility with the dual-layer DVD-ROM is achieved even when user data recording is completed in the middle of the data area of the first layer (layer 0). It becomes possible to keep.

  Next, an information recording method according to the present embodiment for a double-layer DVD + R (optical disc 2) based on the OTP method, for example, which conforms to the layout of a read-only DVD disc will be described 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-2 show a recording method according to the embodiment of the present invention when the recording of user data is completed in the middle of layer 1. FIG. 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 embodiment, as shown in FIG. 4B-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 halfway, in another embodiment, as shown in FIG. 4 (b-2), the user can change the data area of the second recording layer (layer 1). Dummy data (Dummy Data) having a data attribute, 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.

  Further, FIGS. 4C to 4C show a recording method according to the embodiment of the present invention when user data recording is completed in the middle of layer 0 (first recording layer). FIG. 4C shows that the recording of user data is completed at the position of the address Y of the first layer (layer 0). When the recording of user data is completed during the recording of the first layer (layer 0), the area from addresses Y to E in the figure becomes the intermediate area of layer 0. As a result, the intermediate area of the second layer (layer 1) is E ′ to Y ′ in the figure, and the data area of layer 1 is Y ′ to B ′ in the figure. That is, by determining the data area of layer 0, the range of the data area of layer 1 is determined.

  When the user data recording is completed in this way, in one embodiment, as shown in FIG. 4C-1, an unrecorded area after the user data recording area is recorded as a lead-out. In this example, since no user data is recorded in the data area of layer 1, the area from the start address Y ′ to address A ′ of the data area of layer 1 is set as a predetermined unrecorded area, and predetermined data = read Record out. Therefore, addresses A to B are lead-in areas, addresses B to Y are layer 0 data areas, addresses Y to E are layer 0 intermediate areas, addresses E 'to Y' are layer 1 intermediate areas, addresses The lead-out area is from Y ′ to A ′. As a result, even when user data recording is completed without recording user data at the second layer (layer 1), data recording is performed as a lead-out in the unrecorded area. When reproducing the data of layer 0), if the read laser is focused on the second layer by the seek to the target address, the data is not recorded on the second layer at the same radius position. It is possible to avoid the problem that the eye data cannot be reproduced.

  FIG. 4C-2 shows another embodiment of the present invention, in which dummy data and lead-out with user data attributes are recorded in a predetermined unrecorded area. When no user data is recorded in the second layer, as shown in FIG. 4C-2, after recording a part of the unrecorded area with dummy data having the user data attribute, the remaining area part is recorded. A lead-out may be recorded. If dummy data having user data attributes is recorded up to address F ′, the lead-out is recorded from addresses F ′ to A ′. Therefore, addresses A to B are lead-in areas, addresses B to Y are layer 0 data areas, addresses Y to E are layer 0 intermediate areas, addresses E 'to Y' are layer 1 intermediate areas, addresses Y 'to F' are the data area of layer 1, and addresses F 'to A' are the lead-out area. As a result, the disc layout becomes 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 data area, there is no problem and the single-sided dual-layer read-only dual-layer DVD-ROM. It becomes possible to maintain compatibility with.

  Further, when the recording of user data is completed in this way, in yet another embodiment, as shown in FIG. 4C-3, user data is recorded in the data area of the recording layer. The area excluding the user data recording area is set as a predetermined unrecorded area, and recording is performed in this area with dummy data having predetermined data = data attribute. In this example, since no user data is recorded in the data area of layer 1, the area from the start address Y ′ to address B ′ of the data area of layer 1 is dummy data having a data attribute as a predetermined unrecorded area. To be recorded. 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 Y are layer 0 data areas, addresses Y to E are layer 0 intermediate areas, addresses E 'to Y' are layer 1 intermediate areas, addresses Y 'to B' are the data area of layer 1 and addresses B 'to A' are the lead-out area. As a result, the disc layout becomes the same as that of a single-sided dual-layer read-only DVD-ROM. Even when user data recording is completed in the middle of the first-layer data area, there is no problem with the single-sided dual-layer read-only DVD-ROM. It becomes possible to maintain compatibility.

  By the way, among the recording methods for the unrecorded area as exemplified in FIGS. 3 and 4, for example, the predetermined data = lead-out is recorded with the area after the user data recording area as the unrecorded area. A control example of the recording process to be executed will be described with reference to a schematic flowchart shown in FIG. Note that, for the sake of explanation by this flowchart, the values shown in FIGS. 3 and 4 are used as addresses. That is, when the target dual-layer DVD + R is the PTP system, both layer 0 and layer 1 have lead-in start address = A, data area start address = B, lead-out area start address = C, lead-out area End address = D and the target dual-layer DVD + R is the OTP format, the lead-in area start address = A, the layer 0 data area start address = B, and the layer 0 intermediate area start address = C, layer 0 intermediate area end address = D, layer 1 intermediate area start address = D ', layer 1 data area start address = C', lead-out area start address = B ', lead-out The end address of the area = A ′. “′” Indicates a bit-inverted value.

  This process is performed as one process when there is a user data recording request from the user through the host (Y in step S1), and after recording for the requested address based on the request (S2) Then, it is confirmed whether there is another recording request (S3). If there is a data recording request (Y in S3), the requested data recording is continued (S2). On the other hand, when the recording of user data is completed (N in S3), the physical address X at which the recording of user data is completed is acquired (S4). The processes of N and S4 in step S3 are executed as address information acquisition means or an address information acquisition function for acquiring recording completion address information at the time of data recording completion.

  After acquiring the user data recording completion address X in this way, it is determined whether the inserted dual-layer DVD + R (optical disc 2) is a PTP disc or an OTP disc (S5). The difference between these methods is recorded in advance in a predetermined area of the optical disc 2, and may be determined based on the information. If the DVD + R is an OTP disc (Y in S5), it is determined whether the user data recording completion address X is an address in layer 0 (S6). If the address X is an address in layer 0 (Y in S6), the lead-out recording start address Y = X ′ is obtained (S7). On the other hand, when the address X is an address in layer 1 (N in S6), the lead-out recording start address Y = X (S8). Next, the lead-out recording end address Z = A ′ is acquired (S9). The processes in steps S6 to S9 are executed as an unrecorded area recognition unit or an unrecorded area recognition function for certifying the range of the unrecorded area in layer 1. Thereafter, a lead-out is recorded with these addresses Y to Z as an unrecorded area (S10), and the process is terminated (S11). The process of step S10 is executed as a recording processing unit or a recording processing function.

  On the other hand, if the inserted dual-layer DVD + R is a PTP disc (N in S5), it is determined whether or not the user data recording completion address X is an address in layer 0 (S12). When the address X is an address in layer 0 (Y in S12), the lead-out recording start address Y = B is obtained (S13). When the address X is an address in layer 1 (N in S12), the lead-out recording start address Y = X (S14). Next, the lead-out recording end address Z = D is acquired (S15). The processes in steps S12 to S15 are executed as an unrecorded area recognition unit or an unrecorded area recognition function for certifying the range of the unrecorded area in layer 1. Thereafter, a lead-out is recorded with these addresses Y to Z as an unrecorded area (S10), and the process is terminated (S11). The process of step S10 is executed as a recording processing unit or a recording processing function. Further, the processes in steps S3 to S10 are executed as an unrecorded area data embedding unit or an unrecorded area data embedding process.

  In the processing control example according to this flowchart, recording of the lead-in area, the lead-out area in the layer 0, or the intermediate area is not particularly described, but until the recording of the user data is completed and the optical disc 2 is ejected. As long as it is recorded in a predetermined area. If the address X is an address in layer 0, that is, if no user data is recorded in layer 1, as described above, a part of the unrecorded area is set as dummy data of the user data attribute. The lead-out may be recorded after recording.

  In addition, among the recording methods for the unrecorded area as illustrated in FIGS. 3 and 4, for example, the area other than the user data recording area where the user has recorded data in the data area of the recording layer is defined as a predetermined unrecorded area. A control example of recording processing executed by the CPU 13 will be described with reference to a schematic flowchart shown in FIG. For the description of this flowchart, the values shown in FIGS. 3 and 4 are used as addresses as in the case described above.

  First, steps S1 to S5 are performed in the same manner as in FIG. If the DVD + R is an OTP disc (Y in S5), it is determined whether or not the user data recording completion address X is an address in layer 0 (S6). If the address X is an address in layer 0 (Y in S6), the dummy data recording start address Y = X ′ is obtained (S21). On the other hand, if the address X is an address in layer 1 (N in S6), the dummy data recording start address Y = X (S22). Next, the dummy data recording end address Z = B ′ is acquired (S23). The processes in steps S6, S21 to S23 are executed as an unrecorded area recognition unit or an unrecorded area recognition function for authorizing the range of the unrecorded area in layer 1. Thereafter, dummy data is recorded with these addresses Y to Z as an unrecorded area (S24), then a lead-out is recorded in the lead-out area (S25), and the process is terminated (S26). The processing in step S24 is executed as a recording processing means or a recording processing function.

  On the other hand, if the inserted dual-layer DVD + R is a PTP disc (N in S5), it is determined whether the user data recording completion address X is an address in layer 0 (S27). If the address X is an address in layer 0 (Y in S27), the dummy data recording start address Y = B is obtained (S28). When the address X is an address in the layer 1 (N in S27), the dummy data recording start address Y = X (S29). Next, the dummy data recording end address Z = C is acquired (S30). The processing of these steps S27 to S30 is executed as an unrecorded area recognition means or an unrecorded area recognition function that recognizes the range of the unrecorded area in layer 1. Thereafter, dummy data is recorded with these addresses Y to Z as an unrecorded area (S24), then a lead-out is recorded in the lead-out area (S25), and the process is terminated (S26). The processing in step S24 is executed as a recording processing means or a recording processing function. Further, the processing of these steps S3 to S25 is executed as unrecorded area data embedding means or unrecorded area data embedding processing.

  In the processing control example according to this flowchart, the recording of the lead-in area, the lead-out area in the layer 0, or the intermediate area is not particularly described, but the user data recording is completed and the optical disc 2 is ejected. Until it is recorded in a predetermined area.

  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.

1 is a block diagram showing a schematic configuration of an optical disc apparatus 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 information recording method of this Embodiment with respect to 2 layer DVD + R by a PTP system. It is explanatory drawing which shows typically the information recording method of this Embodiment with respect to 2 layer DVD + R by an OTP system. It is a schematic flowchart which shows the example of a control of a recording process in case predetermined data is taken out. It is a schematic flowchart which shows the example of control of a recording process in case predetermined data is made into dummy data.

Explanation of symbols

2 Information recording media

Claims (8)

It has two recording layers having a data area for recording user data. In the opposite track path method, the first recording layer is directed from the inner periphery to the outer periphery, and the second recording layer is directed from the outer periphery to the inner periphery. An information recording apparatus for recording data on an optical disc on which the user data is recorded,
When user data is recorded up to a predetermined position inside the data area that is initially set in the first recording layer,
An information recording apparatus for recording lead-out data from a position having an address of the second recording layer having a bit reversal relationship with an address of the predetermined position . The information recording apparatus according to claim 1, wherein an intermediate area of the first recording layer is recorded adjacent to the predetermined position . The information recording apparatus according to claim 1 or 2, characterized in that to record the middle area of the second recording layer adjacent to the position having the address of the second recording layer. 4. The information recording apparatus according to claim 1, wherein the outer periphery of the first recording layer and the second recording layer is left as an unrecorded region . 5. It has two recording layers having a data area for recording user data. In the opposite track path method, the first recording layer is directed from the inner periphery to the outer periphery, and the second recording layer is directed from the outer periphery to the inner periphery. An information recording method for recording data on an optical disc on which the user data is recorded,
When user data is recorded up to a predetermined position inside the data area that is initially set in the first recording layer,
A lead-out data is recorded from a position having an address of the second recording layer having a bit reversal relationship with an address of the predetermined position . 6. The information recording method according to claim 5, wherein an intermediate area of the first recording layer is recorded adjacent to the predetermined position . 7. The information recording method according to claim 5, wherein an intermediate area of the second recording layer is recorded adjacent to a position having the address of the second recording layer . 8. The information recording method according to claim 5, wherein the outer periphery of the first recording layer and the second recording layer is left unrecorded .

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