JP2005149722A - Information recording method, information recording apparatus, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To avoid loss of compatibility with a reproduction only information recording medium, caused by the generation of an unrecorded area when the recording in a data area of a recording layer is terminated midway, and to maintain the compatibility, in the recording operation for the information recording medium having the plurality of recording layers. <P>SOLUTION: The compatibility with the reproduction only information recording medium having the plurality of recording layers can be maintained, by the recording the minimum lead-out data (referring to X-E of (b-2)) following user data, after the completion of the recording of data associated with the recording request of the user data, even when the recording of the user data in the data area is terminated midway. Because the recorded lead-out data are the minimum (referring to X-E of (b-2)), the lead-out data are not necessary recorded throughout the unrecorded area (referring to X-D of (b-1)), and it does not take much time in taking out the disk after the user data are recorded. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an information recording apparatus, information recording method, and program for recording information on a recordable information recording medium such as a dual-layer DVD + R (Digital Versatile Disc + Recordable) disc.

  As recordable DVD discs, there are DVD + R discs that are write once DVD discs and DVD + RW discs that are rewritable DVD discs. These discs are recordable DVD discs that have high reproduction compatibility with single-sided single-layer read-only DVD discs. is there. 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 a “double-layer DVD + R disc”) having playback compatibility with a single-sided dual-layer read-only DVD disc.
The dual-layer DVD + R disc has a recording capacity of 8.4 gigabytes (Gbyte), and the conventional single-layer DVD + R disc has a recording capacity almost double that of the data capacity of 4.7 Gbytes. Data can be read out by a DVD player or a DVD-ROM drive capable of reproducing a single-sided dual-layer read-only DVD disc.
Such a recordable DVD disc is disclosed in, for example, Patent Document 1.

  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 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 dual-layer DVD disk is continuously allocated from the start address of the first layer data area, and the logical address is continuous from the first layer data area end address to the second layer data area start address. doing.
That is, when reproducing from a dual-layer DVD disc, 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 disc, 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.
Thus, even when recording on a dual-layer DVD + R disc, the user can perform recording without being aware of the recording layer.
JP 2001-126255 A

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.

  It is an object of the present invention to provide a recording operation for an information recording medium having a plurality of recording layers, in which recording is completed in the middle of the data area of the recording layer, resulting in an unrecorded area. It is to avoid the loss of compatibility and to maintain the compatibility.

In order to achieve the above object, the present invention provides the following information recording method, information recording apparatus, and program.
(1) An information recording method for recording user data on a write-once optical disc having a plurality of recording layers, the step of recording user data across the plurality of recording layers, and the step of recording user data after the step When recording lead-out data from a user data recording end address to a lead-out area end address, checking whether there is an unrecorded user data area on the side of the address larger than the lead-out area end address; If the unrecorded user data area exists as a result of checking by the process, the lead-out data is recorded so as to fill the unrecorded user data area in addition to the lead-out data, and the check is performed by the process. As a result, when the unrecorded user data area does not exist, Information recording method of the serial read-out data and a step to only read out the data up to the lead-out area end address.
(2) In the information recording method of (1), the checking step is a step of checking whether an unrecorded user data area exists on the side of an address larger than the lead-out area end address by RF check. Information recording method.

(3) An information recording apparatus for recording user data on a write-once optical disc having a plurality of recording layers, a recording means for recording user data across the plurality of recording layers, and user data recording by the recording means When recording the lead-out data from the user data recording end address to the lead-out area end address later, a check to check whether there is an unrecorded user data area on the side of the address larger than the lead-out area end address If the unrecorded user data area is present in the recording means as a result of checking by the checking means, in addition to the lead-out data, lead-out data is filled so as to fill the unrecorded user data area. When recording and the above unrecorded user data area does not exist Information recording apparatus the lead-out data is provided with means for only readout data to the lead-out area end address.
(4) In the information recording apparatus of (3), the check means is a means for checking whether an unrecorded user data area exists on the side of an address larger than the lead-out area end address by RF check. Information recording device.

(6) A procedure for recording user data on a write-once optical disc having a plurality of recording layers in a computer, a procedure for recording user data across the plurality of recording layers, and a user after recording user data by the procedure When recording lead-out data from the data recording end address to the lead-out area end address, a procedure for checking whether there is an unrecorded user data area on the side of the address larger than the lead-out area end address, and As a result of checking by the procedure, when the unrecorded user data area exists, the lead-out data is recorded so as to fill the unrecorded user data area in addition to the lead-out data, and the result checked by the procedure When there is no unrecorded user data area, A program for causing the serial read-out data to execute a procedure to only read out the data up to the lead-out area end address.
(6) In the program of (5), the checking procedure is a procedure for checking whether or not an unrecorded user data area exists on the side of an address larger than the lead-out area end address by RF check. .

  The information recording method, the information recording apparatus, and the program according to the present invention are based on the fact that recording is completed in the middle of the data area of the recording layer and an unrecorded area is generated in the recording operation for the information recording medium having a plurality of recording layers. It is possible to avoid the loss of compatibility with the reproduction-only information recording medium and to maintain the compatibility.

Hereinafter, the best mode for carrying out the present invention will be specifically described with reference to the drawings.
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 disk 2 is an example applied to a case where a double-layer DVD + R disk conforming to the DVD + R disk 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 computer as 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 storage medium stores a program that will be described later written in a code that can be decoded 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.

The present embodiment is characterized in the recording processing control when a double-layer DVD + R disc, 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. Prior to this, the layout of a read-only DVD disc, which is the premise of the DVD + R disc standard, will be described.
First, FIG. 2 shows a layout example of a read-only DVD disc. In the figure, the vertical axis indicates the physical address, and the horizontal axis indicates the radial position (Radius) of the optical disk.
2A shows a single-layer single-layer disc (hereinafter referred to as “single-layer disc”), and FIG. 2B shows a PTP single-side dual-layer disc (hereinafter referred to as “single-layer disc”). FIG. 2C shows the case of an OTP single-sided dual layer disk (hereinafter referred to as “OTP disk”).

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 PTP disc and layer 0 of the OTP disc reproduce data from the inner circumference to the outer circumference, and layer 1 of the OTP disc reproduces data from the outer circumference to the inner circumference. 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, That is, 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 the layer 0 and the data area start address of the layer 1, and The start and end addresses of the intermediate area of each 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 for a dual-layer DVD + R disc (optical disc 2) based on the PTP method, for example, which conforms 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 disc in an unrecorded state where no recording is performed.
Each recording layer, which is 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, layer The addresses A to D in 1) are located at the same radial position of the optical disc 2.

FIG. 3B shows a layout of a dual-layer DVD + R disc when user data recording is completed in the middle of layer 1.
Also, (b-1) to (b-2) in FIG. 3 show a recording method when user data recording is completed in the middle of layer 1.
FIG. 3B shows that the user data recording is completed at the address X in the second layer (layer 1).

When recording of user data is completed in the middle as described above, an unrecorded area after the user data recording area is recorded in the lead-out area as shown in (b-1) of FIG.
That is, the area from layer X address X to address D is recorded in the lead-out area as a predetermined unrecorded area.
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 becomes the same as that of a single-sided dual-layer read-only DVD-ROM disc, 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 playback is possible. Compatibility with a dedicated DVD-ROM disk can be maintained.

When user data recording is completed in the middle, as shown in FIG. 3B-2, the unrecorded area after the user data recording area is reduced from the minimum lead-out area (64 ECC block (ECC Block)). Recorded with the configured lead-out data (according to the temporary lead-out on the DVD + RW disc).
That is, the area from the address X to the address D of the layer 1 is a predetermined unrecorded area, and among the areas from the address X to the address D, the area from the address X to the address E is recorded in the lead-out area. .
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 E are lead-out areas.

Next, an information recording method for a double-layer DVD + R disc (optical disc 2) based on the OTP method, for example, which conforms to the layout of the read-only DVD disc will be described with reference to FIG.
First, FIG. 4A shows a layout of a dual-layer DVD + R disc 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.

FIG. 4B shows a layout of a dual-layer DVD + R disc when user data recording is completed in the middle of layer 1.
(B-1) to (b-2) in FIG. 4 show a recording method according to the embodiment of the present invention when recording of user data is completed in the middle of layer 1.
FIG. 4B shows that user data recording is completed at the position of the address X of the second layer (layer 1).

Thus, when the recording of user data is completed in the middle, as shown in (b-1) of FIG. 4, the unrecorded area after the user data recording area is recorded with the lead-out disc.
That is, the area from address X to address A ′ is recorded on the lead-out disc as a predetermined unrecorded area.
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 becomes the same as that of a single-sided dual-layer read-only DVD-ROM disc, 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 playback is possible. Compatibility with a dedicated DVD-ROM disk can be maintained.

Further, when the user data recording is completed in the middle, as shown in FIG. 4B-2, the unrecorded area after the user data recording area is set to a minimum lead-out disk (read composed of 64 ECC blocks). Out data (according to temporary lead-out on DVD + RW disc)) is recorded.
That is, the area from address X to address E is recorded as a predetermined unrecorded area in the lead-out area.
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 layer 1 data areas, and addresses X to E are lead-out areas.

Next, recording when user data recording is completed in the middle of layer 1 as shown in (b-1) to (b-2) of FIG. 3 and (b-1) to (b-2) of FIG. A process flow for carrying out the method will be described with reference to FIGS.
Such processing is executed in accordance with a program stored in the ROM 12 by the CPU 13 in the optical disc apparatus 1 and loaded (installed) in a main memory (not shown) of the CPU 13 when the optical disc apparatus 1 is powered on.

FIG. 5 is a flowchart showing a flow of processing for implementing a method of recording lead-out data when recording of user data is completed in the middle of layer 1.
FIG. 6 is a schematic view illustrating a close track session command (Close Track / Session Command (CDB: 5B)) issued by the host computer to the optical disc apparatus 1.
FIG. 7 is a schematic diagram illustrating a close function table of a close track session command (CDB: 5B).

When the user data recording is completed, the host computer issues a close track session command (CDB: 5B) as illustrated in FIG.
When this command is issued, the optical disc apparatus 1 refers to the close function table of the close track session command (CDB: 5B) illustrated in FIG. 7 and transmits the close track session command (CDB: 5B) illustrated in FIG. Analysis is performed to confirm whether or not the close function included in the close track session command (CDB: 5B) is a close function (Close Function) “111” which is a command for requesting a minimum lead-out data recording (step) S101).

  As a result, if it is determined that the received command is the close function “111” which is a command for requesting a minimum lead-out data recording (Y in step S101), the user data recording end address position ((b in FIG. 3) ) X position, X position of FIG. 4B) and the start address of the lead-out area, it is confirmed by address comparison (step S102).

  As a result, if it is determined that there is a difference (Y in step S102), the lead-out data composed of 64 ECC blocks (according to the temporary lead-out on the DVD + RW disc) is recorded after the user data recording end address in the data area. (Step S103), and then the optical disk 2 is taken out.

  On the other hand, if it is determined in step S101 that the close track session command from the host computer is other than the close function “111” which is the minimum lead-out data recording request command (N in step S101), Recording is performed with lead-out data from the recording end address of user data to the end address position of the lead-out area (step S104), and then the optical disc 2 is taken out.

  Even if it is determined that the close track session command from the host computer is the close function “111” which is a command for recording the minimum lead-out data and ejecting the disc (Y in step S101), the data If it is determined that there is no difference between the recording end address of the user data in the area and the start address of the lead-out area (N in step S102), the lead-out data is recorded in the lead-out area (step S104), and then the optical disc 2 is taken out.

  Therefore, even when the user data recording is completed in the middle of the data area, the read-out data is recorded after the user data, so that the read-only information recording having a plurality of recording layers (layer 0, layer 1) is performed. Compatibility with media can be maintained.

  If the close track session command from the host computer is the minimum lead-out data recording request command close function “111” in step S101, the lead-out data to be recorded remains at the minimum. Thereby, since it is not necessary to record the lead-out data over the entire unrecorded area in the data area, the time required for taking out the optical disc 2 after the user data recording can be remarkably shortened.

FIG. 8 is a flowchart showing another processing flow for implementing the method of recording the lead-out data when the recording of the user data is completed in the middle of the layer 1.
FIG. 9 is a schematic diagram illustrating a command (Vender Unique command CDB: CB) for recording an unrecorded area in a data area issued from the host computer to the optical disc apparatus 1 with lead-out data.

  When the CPU 13 of the optical disc apparatus 1 receives a command (Vender Unique command CDB: CB) illustrated in FIG. 9 for recording an unrecorded area in the data area with lead-out data from the host computer (Y in step S201), it is inserted. Whether or not there is an unrecorded area in the data area of the optical disc 2 is confirmed by RF check (step S202).

  As a result, as illustrated in (b-1) of FIG. 3 or (b-1) of FIG. 4, if there is no unrecorded area in the data area, an unrecorded area is included in the data area in step S202. In response to a command (Vender Unique command CDB: CB) for recording an unrecorded area transmitted from the host computer with lead-out data (Nender in step S202), the optical disc apparatus 1 completes the command (Complete). Is returned (step S205).

On the other hand, if it is determined by the RF check in step S202 that there is an unrecorded area in the data area (Y in step S202), the start address of the unrecorded area and the end of the lead-out area The recording time of the unrecorded area is calculated by referring to the address, and the calculated recording time of the unrecorded area is transferred to the host computer (step S203).
In this case, if there is no unrecorded area in the data area of the optical disk 2 which is a single-sided dual-layer DVD disk inserted in the optical disk apparatus 1, the recording time is set to “0” and data is sent to the host computer. Transfer (step S203).
Then, after transferring the data to the host computer, the unrecorded area in the data area is recorded with the lead-out data (step S204).

  As described above, when a command (Vender Unique command CDB: CB) for recording all unrecorded areas with lead-out data is received from the host computer (Y in step S201), the unrecorded areas of the user data are not yet recorded. Since the entire recording area is recorded with the lead-out data, for example, when the user reproduces the data of the first recording layer (layer 0), it happens to the second recording layer (layer 1) by seeking to the target address. When the reading laser is focused, the data of the first recording layer (layer 0) cannot be reproduced because the data is not recorded on the second recording layer (layer 1) at the same radial position. It can be avoided.

FIG. 10 is a flowchart showing the flow of processing when there is no disk access command from the host computer.
When there is no disk access command from the host computer (N in step S301), the optical disk apparatus 1 determines whether or not an unrecorded area exists for the optical disk 2 that is a single-sided dual-layer DVD disk inserted. Is confirmed by RF check (step S202).

  As a result, if there is an unrecorded area in the data area as shown in FIG. 3B-2 or FIG. 4B-2, it is determined in step S302 that an unrecorded area exists in the data area. In the background when the disk access command is not issued from the host computer (Y in step S302), the optical disc apparatus 1 records the lead-out data in the unrecorded area in the data area (step S303).

  On the other hand, as shown in (b-1) of FIG. 3 or (b-1) of FIG. 4, if there is no unrecorded area in the data area, there is an unrecorded area in the data area in step S302. It is determined that it does not exist (N in step S302) and waits for a command from the host computer.

Accordingly, the lead-out data is recorded in the unrecorded area in the data area of the optical disk 2 in the background when the disk access command from the host computer is not issued. For this reason, for example, when the user reproduces the data of the first recording layer (layer 0), the read laser is focused on the second recording layer (layer 1) by the seek to the target address. Further, it is possible to avoid the problem that the data of the first recording layer (layer 0) cannot be reproduced because no data is recorded on the second recording layer (layer 1) at the same radius position.
In addition, since the recording of such lead-out data is performed in the background when no disk access command is issued from the host computer, there is no inconvenience such as a long time for taking out the optical disk 2 after data recording.

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 the double layer DVD + R disc by a PTP system. It is explanatory drawing which shows typically the information recording method of this Embodiment with respect to the double layer DVD + R disc by an OTP system. 6 is a flowchart showing a flow of processing for implementing a method of recording lead-out data when user data recording is completed in the middle of layer 1;

It is a schematic diagram which illustrates the close track session command (CDB: 5B) which a host computer issues to an optical disk apparatus. It is a schematic diagram which illustrates the close function table of a close track session command (CDB: 5B). 12 is a flowchart showing another processing flow for implementing a method of recording lead-out data when user data recording is completed in the middle of layer 1. It is a schematic diagram illustrating a command (Vender Unique command CDB: CB) for recording an unrecorded area in a data area issued from the host computer to the optical disc apparatus with lead-out data. It is a flowchart which shows the flow of a process when there is no disk access command from a host computer.

Explanation of symbols

1: optical disk device 2: information recording medium (optical disk) 3: spindle motor 4: optical pickup device 5: laser control circuit 6: motor driver 7: reproduction signal processing circuit 8: servo controller 9: buffer RAM 10: buffer manager 11: Interface 12: ROM 13: CPU 14: RAM

Claims (6)

An information recording method for recording user data on a write-once optical disc having a plurality of recording layers,
A step of recording user data across the plurality of recording layers, and when recording lead-out data from a recording end address of the user data to a lead-out region end address after the user data is recorded by the step, the lead-out region end A step of checking whether there is an unrecorded user data area on the side of an address larger than the address, and if the unrecorded user data area exists as a result of checking by this step, in addition to the lead-out data, The process of recording the lead-out data so as to fill the unrecorded user data area, and if the unrecorded user data area does not exist as a result of checking by the process, the lead-out data is transferred to the lead-out area end address. Process with only lead-out data Information recording method characterized by comprising.   2. The information recording according to claim 1, wherein the checking step is a step of checking whether or not an unrecorded user data area exists on an address side larger than the lead-out area end address by an RF check. Method. An information recording apparatus for recording user data on a write-once optical disc having a plurality of recording layers,
A recording means for recording user data across the plurality of recording layers; and when the lead-out data is recorded from the recording end address of the user data to the lead-out area end address after the user data is recorded by the recording means, Check means for checking whether or not an unrecorded user data area exists on the side of the address larger than the area end address;
When the unrecorded user data area exists as a result of checking by the checking means in the recording means, the lead-out data is recorded so as to fill the unrecorded user data area in addition to the lead-out data, An information recording apparatus comprising: means for setting the lead-out data only to lead-out data up to the lead-out area end address when there is no unrecorded user data area.   4. An information recording apparatus according to claim 3, wherein said checking means is means for checking whether or not an unrecorded user data area exists on an address side larger than said lead-out area end address by RF check. .   A procedure for recording user data on a write-once optical disc having a plurality of recording layers in a computer, a procedure for recording user data across the plurality of recording layers, and a recording of the user data after recording user data by the procedure When recording lead-out data from the end address to the lead-out area end address, a procedure for checking whether there is an unrecorded user data area on the side of the address larger than the lead-out area end address, and checking by this procedure As a result, when the unrecorded user data area exists, the lead-out data is recorded so as to fill the unrecorded user data area in addition to the lead-out data, and the result of checking by the procedure If there is no recorded user data area, the read Program for executing a procedure for only the read-out data to the lead-out area end address Todeta.   6. The program according to claim 5, wherein the checking procedure is a procedure for checking whether an unrecorded user data area exists on the side of an address larger than the lead-out area end address by RF check.

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