JP2006313600A - Recording method, program, and recording medium, and information recording device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make an information recording medium having multiple rewritable recording layers compatible with a read-only information recording medium in a short period. <P>SOLUTION: When temporarily closing an optical disk which has multiple recording layers each having intermediate areas and rewritable data areas, the information showing the temporary intermediate areas is recorded on the same radial position in each data area based on the information in either one of the recorded or non-recorded areas in each data areas on the optical disk (Steps 705-719). Consequently, the compatibility is achieved with a read-only disk without writing dummy data in all the non-recorded areas in each data area. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a recording method, a program and a recording medium, and an information recording apparatus. More specifically, the present invention relates to a method for recording information on an information recording medium having a plurality of rewritable recording layers, and a plurality of rewritable recording layers. The present invention relates to an information recording apparatus capable of recording information on an information recording medium, a program used for the information recording apparatus, and a recording medium on which the program is recorded.

  In recent years, with the advancement of digital technology and the improvement of data compression technology, CDs (compact discs) and DVDs are used as information recording media for recording computer programs, music information, video information (hereinafter also referred to as “contents”), and the like. Optical discs such as (digital versatile disc) have attracted attention, and along with their lower prices, optical disc devices for recording information on optical discs have become widespread.

  In particular, as rewritable optical discs, CD-RW (CD-rewritable), DVD-RAM, DVD-RW (DVD-rewritable), DVD + RW (DVD + rewritable), and the like are commercially available.

  By the way, a drive device or a player for playing back a reproduction-only optical disc (hereinafter abbreviated as “playback-only disc”) such as a CD-ROM or a DVD-ROM on which content is recorded and sold in advance (hereinafter, for convenience, “ The “reproduction-only drive device” is already widely used. Therefore, it is preferable that even a rewritable optical disk can be reproduced by a read-only drive device. For this purpose, a rewritable optical disc on which content is recorded needs to maintain logical compatibility with a read-only disc (for example, DVD-ROM in the case of DVD + RW).

  One of the features of a read-only disc is that there is no unrecorded area in the information area formed by a lead-in area, a data area, and a lead-out area. In this regard, for example, DVD + RW has been devised so that logical compatibility with DVD-ROM is maintained even when the disc is ejected in the middle of formatting. Specifically, after recording dummy data in an unrecorded area that exists intermittently in the data area, a temporary lead-out is recorded following the LWA (Last Written Address), and the information is recorded. An area is formed, and logical compatibility with the DVD-ROM is maintained, and reproduction on the DVD-ROM drive device becomes possible.

  The amount of content information tends to increase year by year, and a further increase in the recording capacity of one optical disk is expected. As a means for increasing the recording capacity of an optical disc, development relating to the multilayering of recording layers has been actively conducted.

  Some rewritable optical discs having a plurality of recording layers have an intermediate area (middle area) in each recording layer (see, for example, Patent Document 1). In this case, in order to ensure compatibility with the read-only disc, it is necessary that all of the lead-in area, data area, lead-out area, and intermediate area are already recorded. Therefore, in order to ensure compatibility with a read-only disc when there are unrecorded areas, dummy data must be recorded in all unrecorded areas. Therefore, when there are many unrecorded areas, it takes a long time to record dummy data, and it is expected that the performance will deteriorate.

JP 2005-25821 A

  The present invention has been made under such circumstances, and a first object thereof is to provide an information recording medium having a plurality of rewritable recording layers with a compatibility with a read-only information recording medium in a short time. It is to provide a recording method that can be performed.

  The second object of the present invention is to provide an information recording apparatus capable of imparting compatibility with a read-only information recording medium in a short time to an information recording medium having a plurality of rewritable recording layers. There is.

  A third object of the present invention is to execute compatibility with an information recording medium which is executed by a control computer of an information recording apparatus and has a plurality of rewritable recording layers in a short time. And a recording medium on which the program is recorded.

  The invention according to claim 1 is a recording method for recording information on a disc-shaped information recording medium having a plurality of recording layers each provided with an intermediate area and a rewritable data area, wherein the information recording When the user data recording on the medium is temporarily completed, based on the information on at least one of the recorded part and the unrecorded part in each data area of the information recording medium, the data of the same radius position in each data area is recorded. This is a recording method including a step of recording information indicating a temporary intermediate area in each area.

  According to this, when the user data recording on the information recording medium is temporarily completed, the information in each data area is based on the information on at least one of the recorded part and the unrecorded part in each data area of the information recording medium. The information indicating the temporary intermediate area is recorded in the area of the same radius position. In this case, compatibility with a read-only information recording medium can be imparted without performing the process of writing dummy data to all unrecorded portions existing in each data area. Therefore, it becomes possible to give compatibility with a read-only information recording medium in a short time to an information recording medium having a plurality of rewritable recording layers.

  In this case, as in the recording method according to claim 2, in the step of recording the information indicating the temporary intermediate area, the information recording medium is adjacent to the outer peripheral side of the existing recording portion positioned on the outermost peripheral side. Information indicating the temporary intermediate area may be recorded in an area having the same radius as the area to be performed.

  In this case, as in the recording method according to claim 3, prior to the step of recording the information indicating the temporary intermediate area, the radial position of the recorded portion located on the outermost peripheral side of the information recording medium. A step of determining whether or not an unrecorded portion exists in each data area on the inner circumference side; and a step of recording dummy data in the unrecorded portion when an unrecorded portion exists as a result of the determination And can be further included.

  The recording method according to claim 2, wherein, as in the recording method according to claim 4, prior to the step of recording the information indicating the temporary intermediate area, the information recording medium is positioned on the outermost peripheral side. Determining whether the radius position of the recorded portion to be recorded is on the inner peripheral side with respect to a preset radial position; and as a result of the determination, the radial position of the recorded portion positioned on the outermost peripheral side Is located on the inner peripheral side of the preset radial position, in each data area, dummy data is stored in the unrecorded portion existing from the innermost radial position to the preset radial position. A step of recording.

  The recording method according to claim 2, wherein, as in the recording method according to claim 5, prior to the step of recording the information indicating the temporary intermediate area, the information recording medium is positioned on the outermost peripheral side. A step of determining whether the size of the non-recorded portion on the outer peripheral side adjacent to the recorded portion is greater than or equal to the size of the information indicating the temporary intermediate area, and is positioned on the outermost peripheral side. Information indicating the temporary intermediate area is recorded when the size of the unrecorded area on the outer peripheral side adjacent to the recorded area is equal to or larger than the information indicating the temporary intermediate area. The process can be performed.

  Each recording method according to any one of claims 1 to 5 may further include a step of recording temporary termination information on the information recording medium as in the recording method according to claim 6. .

  The recording method according to any one of claims 1 to 6, wherein the position information in which information indicating the temporary intermediate area is recorded on the information recording medium as in the recording method according to claim 7. Can be further included.

  The invention according to claim 8 is a program used for an information recording apparatus capable of recording information on a disc-shaped information recording medium having a plurality of recording layers each provided with an intermediate area and a rewritable data area. And information indicating a temporary intermediate area in the area of the same radial position in each data area based on information on at least one of the recorded area and the unrecorded area in each data area of the information recording medium. A program for causing a control computer of the information recording apparatus to execute a recording procedure.

  According to this, when the program of the present invention is loaded into a predetermined memory and the head address is set in the program counter, the control computer of the information recording apparatus can record the recorded part in each data area of the information recording medium and Based on information on at least one of the unrecorded portions, information indicating a temporary intermediate area is recorded in an area at the same radial position in each data area. That is, according to the program of the present invention, it is possible to cause a computer for controlling an information recording apparatus to execute the recording method according to the first aspect of the present invention, and thereby to record information having a plurality of rewritable recording layers. It becomes possible to give the medium compatibility with a read-only information recording medium in a short time.

  The invention according to claim 9 is a computer-readable recording medium on which the program according to claim 8 is recorded.

  According to this, since the program according to claim 8 is recorded, an information recording medium having a plurality of rewritable recording layers can be reproduced in a short time by causing the computer to execute it. It is possible to provide compatibility with.

  The invention according to claim 10 is an information recording apparatus capable of recording information on a disc-shaped information recording medium having a plurality of recording layers each provided with an intermediate area and a rewritable data area, A processing device for writing information to the information recording medium; when temporarily recording user data on the information recording medium, the recorded portion and the unrecorded portion in each data area of the information recording medium; A control device for recording information indicating a temporary intermediate region in the region of the same radius position in each of the data regions based on information on at least one of the data regions via the processing device. .

  According to this, when the recording of the user data on the information recording medium is temporarily completed, the control device, based on information on at least one of the recorded part and the unrecorded part in each data area of the information recording medium, Information indicating a temporary intermediate area is recorded in each data area at the same radial position via the processing device. In this case, compatibility with a read-only information recording medium can be imparted without performing the process of writing dummy data to all unrecorded portions existing in each data area. Therefore, it becomes possible to give compatibility with a read-only information recording medium in a short time to an information recording medium having a plurality of rewritable recording layers.

  In this case, as in the information recording device according to claim 11, the control device is configured to place the control device in a region having the same radial position as a region adjacent to the outer peripheral side of the recorded portion located on the outermost peripheral side in the information recording medium. Information indicating the temporary intermediate area may be recorded via the processing device.

  In this case, as in the information recording device according to claim 12, the control device further positions the outermost position on the information recording medium prior to recording the information indicating the temporary intermediate area. When there is an unrecorded portion in each data area on the inner circumference side from the radial position of the recorded portion, dummy data can be recorded in the unrecorded portion via the processing device.

  13. The information recording apparatus according to claim 11, wherein the control apparatus further includes the information recording apparatus prior to recording information indicating the temporary intermediate area, as in the information recording apparatus according to claim 13. When the radial position of the recorded part located on the outermost peripheral side in the recording medium is on the inner peripheral side with respect to the preset radial position, the preset position is set from the innermost radial position in each data area. The dummy data can be recorded in the unrecorded part existing up to the radius position that is set via the processing device.

  In the information recording apparatus according to claim 11, as in the information recording apparatus according to claim 14, the control device is configured so that the outer peripheral side of the information recording medium adjacent to the existing recording portion located on the outermost peripheral side is not. When the size of the recording unit is equal to or larger than the size of the information indicating the temporary intermediate area, the information indicating the temporary intermediate area can be recorded.

  15. In each of the information recording devices according to claims 10 to 14, as in the information recording device according to claim 15, the control device further sends temporary termination information to the information recording device via the processing device. It can be recorded on a medium.

  In each of the information recording devices according to claims 10 to 15, as in the information recording device according to claim 16, the control device further includes position information in which information indicating the temporary intermediate area is recorded. The information can be recorded on the information recording medium via the processing device.

  In each of the information recording devices according to claims 10 to 16, the control device further includes information in which information indicating the temporary intermediate area is already recorded, as in the information recording device according to claim 17. When recording user data on a recording medium, the user data can be overwritten on an area in which information indicating the temporary intermediate area is recorded.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a schematic configuration of an optical disc apparatus 20 as an information recording apparatus according to an embodiment of the present invention.

  An optical disk device 20 shown in FIG. 1 includes a spindle motor 22 as a motor for rotating the optical disk 15, an optical pickup device 23, a seek motor 21 for driving the optical pickup device 23 in the sledge direction, and laser control. A circuit 24, an encoder 25, a drive control circuit 26, a reproduction signal processing circuit 28, a buffer RAM 34, a buffer manager 37, an interface 38, a flash memory 39, a CPU 40, and a RAM 41 are provided. Note that the arrows in FIG. 1 indicate the flow of typical signals and information, and do not represent the entire connection relationship of each block. In addition, the optical disk device 20 is compatible with an optical disk having a plurality of recording layers (hereinafter also referred to as “multilayer disk” for convenience). The optical disk 15 is an information recording medium having a plurality of recording layers capable of rewriting recorded information.

  The optical pickup device 23 is a device for condensing laser light on a recording layer to be accessed (hereinafter also referred to as “target recording layer”) in the optical disc 15 and receiving reflected light from the recording layer. The optical pickup device 23 includes a semiconductor laser that emits a laser beam having a wavelength corresponding to the optical disc 15, an objective lens that condenses the light beam emitted from the semiconductor laser on the target recording layer of the optical disc 15, and is reflected by the target recording layer. And a driving system (focusing actuator and tracking actuator) for driving the objective lens (both not shown). The light receiver has a plurality of light receiving elements (or light receiving areas), and outputs a signal (photoelectric conversion signal) corresponding to the amount of light received by each light receiving element (or light receiving area) to the reproduction signal processing circuit 28.

  Based on the output signal (a plurality of photoelectric conversion signals) of the photoreceiver, the reproduction signal processing circuit 28 performs servo signals (focus error signal, track error signal, etc.), address information, synchronization signal, And an RF signal and the like are acquired. The servo signal obtained here is output to the drive control circuit 26 and the CPU 40, the address information and the RF signal are output to the CPU 40, and the synchronization signal is output to the encoder 25, the drive control circuit 26, and the like. The reproduction signal processing circuit 28 performs decoding processing, error detection processing, and the like on the RF signal. When an error is detected, the reproduction signal processing circuit 28 performs error correction processing, and then plays back the buffer via the buffer manager 37 as reproduction data. Store in the RAM 34.

  The drive control circuit 26 generates a drive signal for the tracking actuator for correcting the displacement of the objective lens in the tracking direction based on the track error signal from the reproduction signal processing circuit 28. Further, the drive control circuit 26 generates a driving signal for the focusing actuator for correcting the focus shift of the objective lens based on the focus error signal from the reproduction signal processing circuit 28. The drive signals for the actuators generated here are output to the optical pickup device 23. Thereby, tracking control and focus control are performed. Furthermore, the drive control circuit 26 generates a drive signal for driving the seek motor 21 and a drive signal for driving the spindle motor 22 based on an instruction from the CPU 40. The drive signal of each motor is output to the seek motor 21 and the spindle motor 22, respectively.

  The buffer RAM 34 temporarily stores data to be recorded on the optical disc 15 (recording data), data reproduced from the optical disc 15 (reproduction data), and the like. Data input / output to / from the buffer RAM 34 is managed by the buffer manager 37.

  The encoder 25 takes out the recording data stored in the buffer RAM 34 through the buffer manager 37 based on an instruction from the CPU 40, modulates the data, adds an error correction code, and the like, and writes a signal to the optical disc 15. Is generated. The write signal generated here is output to the laser control circuit 24.

  The laser control circuit 24 controls the light emission power of the semiconductor laser. For example, during recording, a laser control circuit 24 generates a semiconductor laser drive signal based on the write signal, recording conditions, semiconductor laser emission characteristics, and the like.

  The interface 38 is a bidirectional communication interface with a host device (for example, a personal computer) 90 and conforms to ATAPI (AT Attachment Packet Interface).

  The flash memory 39 stores various programs including a program according to the present invention described by codes decodable by the CPU 40, recording conditions including recording power and recording strategy information, and emission characteristics of the semiconductor laser. Yes.

  The CPU 40 controls the entire optical disc apparatus 20 according to the program stored in the flash memory 39 and saves data necessary for control in the RAM 41 and the buffer RAM 34.

  Here, the optical disk 15 will be described.

  As shown in FIG. 2 as an example, the optical disc 15 includes a protective layer P1, a recording layer L1 (first recording layer), a protective layer P2, and a recording layer L2 (second recording layer) in order from the incident side of the light beam. , A protective layer P3, a light reflecting layer RL, a print protective layer P4, and the like. In addition, there is a translucent film formed of gold or dielectric between the recording layer L1 and the protective layer P2. That is, the optical disk 15 is a so-called single-sided dual-layer disk. Each recording layer is provided with a track having spiral or concentric guide grooves. Then, the optical disc 15 is set in the optical disc device 20 so that the recording layer L1 is closer to the optical pickup device 23 than the recording layer L2. Therefore, a part of the light beam incident on the optical disk 15 is reflected by the semi-transparent film, and the rest is transmitted through the semi-transparent film. And the light beam which permeate | transmitted the semi-transparent film | membrane is reflected by the light reflection layer RL. Hereinafter, for convenience, the light beam reflected by the translucent film is referred to as “reflected light from the recording layer L1” or “reflected light from the recording layer L1”, and the light beam reflected by the light reflecting layer RL is referred to as “recording layer L2”. From the recording layer L2 "or" reflected light from the recording layer L2. " As an example, the optical disk 15 is a recording layer in an information recording medium that conforms to the DVD + RW standard.

  By the way, for a single-sided dual-layer disc, with respect to the track path (reproduction scanning path), an opposite track path (hereinafter referred to as “OTP”) method and a parallel track path (hereinafter referred to as “PTP”) method. There are two types.

  In an OTP type single-sided dual-layer disc, as shown in FIG. 3 as an example, the recording layer L1 is provided with a lead-in area, a data area, and an intermediate area from the inner periphery to the outer periphery of the disc. Further, an intermediate area, a data area, and a lead-out area are provided from the outer periphery to the inner periphery of the disk. In the recording layer L1, physical addresses that continuously increase from the lead-in area to the intermediate area are allocated, and in the recording layer L2, the physical address of the recording layer L1 is set to the bit from the intermediate area to the lead-out area. An inverted address is allocated. That is, in the recording layer L2, the physical addresses continuously increase from the intermediate area toward the lead-out area. In this case, the direction of the track path is the direction from the lead-in area to the intermediate area in the recording layer L1, and the direction from the intermediate area to the lead-out area in the recording layer L2.

  In addition, in the OTP single-sided dual-layer disc, the start position of the lead-in area and the end position of the lead-out area, the end position of the data area of the recording layer L1, the start position of the data area of the recording layer L2, and the recording layer The start position and end position of the intermediate region are at the same radial position. On the other hand, the end position of the data area of the recording layer L2 does not necessarily coincide with the start position of the data area of the recording layer L1. In this case, the lead-out is recorded in the difference area. The radial position is a position in the radial direction of the disk and is based on the center of rotation of the disk.

  On the other hand, as shown in FIG. 4 as an example, a single-sided dual-layer disc of the PTP system is divided into each recording layer into a lead-in area, a data area, and a lead-out area from the inner circumference side to the outer circumference side of the disk. Each information area is provided. That is, a single-sided dual-layer disc of the PTP system has an information area for each recording layer, and each recording layer can be regarded as an independent recording layer. In each recording layer, physical addresses that continuously increase from the lead-in area to the lead-out area are allocated. In this case, the direction of the track path is the direction from the lead-in area to the lead-out area in each recording layer.

  In the single-sided dual-layer disc of the PTP method, the start position and end position of the lead-in area in each recording layer, the start position of the data area in each recording layer, and the end position of the lead-out area in each recording layer are mutually different. At the same radius position. On the other hand, the end position of the data area in each recording layer may be different for each recording layer. In this case, the lead-out is recorded in the difference area.

  In this embodiment, as an example, the optical disk 15 is an OTP single-sided dual-layer disk.

《Format processing》
Next, format processing in the optical disc apparatus 20 will be briefly described with reference to FIGS. The flowchart in FIG. 5 corresponds to a series of processing algorithms executed by the CPU 40. When a format request command is received from the host device 90, the start address of the program corresponding to the flowchart of FIG. 5 stored in the flash memory 39 is set in the program counter of the CPU 40, and the format process starts. In the present embodiment, as an example, the format is assumed to be a so-called background format.

  Here, the optical disk 15 is assumed to be a blank disk as shown in FIG. A disk in which the recording surface is irradiated with strong laser light and the entire recorded contents are erased is also a blank disk.

  In the first step 501, predetermined information is recorded in a part of the lead-in area of the optical disc 15, as shown in FIG.

  In the next step 503, access permission is notified to the host device 90. As a result, recording and reproduction are possible even if formatting is incomplete.

  In the next step 505, formatting is started. Thus, as shown in FIG. 6C, the encoder 25, the laser control circuit 24, the optical pickup device 23, and the like sequentially transfer predetermined data from the start position of the recording layer L1 to the end position of the recording layer L1. Written. Here, dummy data is recorded in units of 1 ECC block.

  In the next step 515, it is determined whether or not the formatting is completed at a predetermined timing. If the formatting is completed, the determination here is affirmed and the formatting process is terminated. On the other hand, if the formatting is not completed, the determination here is denied and the process waits until the formatting is completed. If there is a recording request or a reproduction request before the formatting is completed, the formatting is interrupted. When the recording process or the reproduction process ends, the formatting is resumed.

<Recording process>
Next, the recording process will be described with reference to FIGS. The flowchart in FIG. 7 corresponds to a series of processing algorithms executed by the CPU 40. When a recording request command is received from the host device 90, the start address of the program corresponding to the flowchart of FIG. 7 stored in the flash memory 39 is set in the program counter of the CPU 40, and the recording process starts. Here, it is assumed that no user data is recorded on the optical disc 15 as shown in FIG. Further, as an example, it is assumed that user data is recorded by a so-called alternate recording method.

  This alternate recording method sequentially records on each recording layer having substantially the same radial position for each partial area corresponding to a preset size (hereinafter also referred to as “alternative reference area” for convenience, for example, one ECC block). It is a method to do. That is, a method of predefining the size of an area that can be continuously recorded in one recording layer, and sequentially recording each area corresponding to the specified size in a plurality of recording layers at substantially the same radial position It is.

  In the first step 601, the drive control circuit 26 is instructed to position the optical pickup device at a target position corresponding to the head of the data area of the recording layer L1. That is, the recording layer L1 is the target recording layer. When the optical pickup device reaches the target position, writing is permitted. As a result, user data is recorded from the head of the data area of the recording layer L1 toward the outer peripheral side as shown in FIG. 8B via the encoder 25, the laser control circuit 24, and the like.

  In the next step 603, it is determined whether or not recording of all specified user data has been completed at a predetermined timing (for example, when recording of one ECC block is completed). If unrecorded user data exists, the determination here is denied and the process proceeds to step 605.

  In this step 605, it is determined whether or not writing for the alternate reference area is completed. If the writing for the alternating reference area is not completed, the determination here is denied, the writing of the user data is continued, and the process returns to step 603. On the other hand, if the writing for the alternating reference area has been completed, the determination here is affirmed, and the routine proceeds to step 607.

  In step 607, the laser control circuit 24 or the like is instructed to interrupt the writing of user data.

  In the next step 609, a layer jump is instructed to the reproduction signal processing circuit 28 and the drive control circuit 26. Thereby, here, the recording layer L2 becomes the target recording layer.

  In the next step 611, it is determined whether or not the current target recording layer is L1. Here, since the recording layer L2 is the target recording layer, the determination here is denied, and the routine proceeds to step 615.

  In step 615, resumption of writing of user data is instructed. As a result, as shown in FIG. 8C, user data is recorded from the layer jumped position toward the inner periphery. Then, the process returns to step 603.

  In step 611, if the current target recording layer is L1, the determination here is denied, and the routine proceeds to step 613.

  In step 613, the drive control circuit 26 is instructed to position the optical pickup device at the target position corresponding to the head position of the next alternate reference area. Then, the process proceeds to step 615.

  Thereafter, the processing in steps 603 to 615 is repeated until the determination in step 603 is affirmed. When the recording of all the specified user data is completed, the determination at step 603 is affirmed and the recording process is terminated.

<Close processing>
Next, a closing process for temporarily recording user data on the optical disc 15 will be described with reference to FIGS. 9 to 13B. The flowchart in FIG. 9 corresponds to a series of processing algorithms executed by the CPU 40. When a close request command is received from the host device 90, the start address of the program corresponding to the flowchart of FIG. 9 stored in the flash memory 39 is set in the program counter of the CPU 40, and the close process starts.

  In the first step 701, it is determined whether or not there is an unrecorded part in the data area of the optical disk 15. If there is an unrecorded part, the determination here is affirmed, and the routine proceeds to step 703.

  In this step 703, it is determined whether or not an instruction is given to record information indicating a temporary intermediate area (hereinafter also referred to as “TMA”) in the data area. If it is instructed to record TMA in the data area, the determination here is affirmed and the routine proceeds to step 705.

  In this step 705, it is determined whether or not there is a free area where TMA can be recorded in the data area. If there is an empty area in which the TMA can be recorded in the data area, the determination here is affirmed and the routine proceeds to step 707.

  In this step 707, the leading radial position (referred to as r1) of the intermediate area is acquired.

  In the next step 709, the radius position (r2) of the recorded part on the outermost periphery side is acquired.

  In the next step 711, it is determined whether or not r1-r2 exceeds a threshold value (referred to as rs). As an example, as shown in FIG. 10A, if r1-r2 exceeds rs, the determination here is affirmed, and the routine proceeds to step 713.

  In this step 713, as shown in FIG. 10B as an example, dummy data is stored in the unrecorded portion adjacent to the outer peripheral side of the recorded portion on the outermost side so that r1−r2 is equal to or less than rs. Write. For other recording layers, dummy data is written in an unrecorded portion at the same radial position. The actual writing to the optical disk 15 is performed via the encoder 25, the laser control circuit 24, and the like as described above.

  In the next step 715, it is determined whether or not the recorded part is continuous from the innermost position of the data area in each recording layer. If the recorded parts are continuous, the determination here is affirmed and the routine proceeds to step 719.

  In step 719, as shown in FIG. 10C as an example, TMA is recorded in the data area of each recording layer. Here, dummy data whose data attribute is set to intermediate area data is recorded as TMA.

  In the next step 721, the TMA position information is recorded in a preset area (for example, a lead-in area) of the optical disc 15.

  In the next step 723, the minimum necessary termination information is recorded in the lead-out area of the optical disc 15 as temporary termination information. Here, for example, disc status information (including any of blank state, open state, closed state, and complete state), data zone end address information (= LWA), lead-out area end address information, etc. are recorded. The When TLO is recorded together with TMA, information related to the TLO area is also recorded.

  In the next step 735, the upper device 90 is notified of the completion of the closing process. Then, the close process ends. Thereby, the optical disk 15 has compatibility with DVD-ROM.

  In step 715, as shown in FIG. 11A as an example, if the recorded part is not continuous, the determination here is denied and the process proceeds to step 717.

  In this step 717, as shown in FIG. 11B as an example, dummy data is written in the unrecorded part so that the recorded part is continuous. Then, the process proceeds to step 719. In this case, in step 719, TMA is recorded as shown in FIG. 11C as an example.

  In step 711, if r1-r2 does not exceed rs, the determination here is denied and the routine proceeds to step 715. That is, the process of step 713 is skipped.

  Further, in step 705, as shown in FIG. 12A as an example, if there is no free area in which the TMA can be recorded in the data area, the determination here is denied and the process proceeds to step 725.

  In this step 725, as shown in FIG. 12B as an example, dummy data is written in the unrecorded portion of the data area.

  In the next step 727, as shown in FIG. 12C as an example, predetermined information is recorded in the intermediate area of each recording layer. Then, the process proceeds to step 735.

  If it is not instructed to record TMA in the data area in step 703, the determination here is negative and the process proceeds to step 729.

  In this step 729, it is determined whether or not the second layer (here, the recording layer L2) is in an unrecorded state. If all are not yet recorded, the determination here is denied and the process proceeds to step 705. On the other hand, as shown in FIG. 13A as an example, if everything is in an unrecorded state, the determination here is affirmed and the routine proceeds to step 731.

  In step 731, as shown in FIG. 13B as an example, a temporary lead-out (TLO) is recorded following the already recorded portion. Then, the process proceeds to step 735.

  Furthermore, if there is no unrecorded portion in step 701, the determination here is denied and the routine proceeds to step 733.

  In step 733, predetermined information (LO) is recorded in the lead-out area. Then, the process proceeds to step 735.

《Re-recording process》
Next, the process when the optical disk 15 that has been once closed as described above is set in the optical disk apparatus 20 again and user data is recorded again will be described with reference to FIGS. 14 to 16B. To do. The flowchart in FIG. 14 corresponds to a series of processing algorithms executed by the CPU 40. When the recording request command is received from the host device 90, the start address of the program corresponding to the flowchart of FIG. 14 stored in the flash memory 39 is set in the program counter of the CPU 40, and the re-recording process starts.

  In the first step 801, the attribute of data recorded in the data area is referred to and it is determined whether or not TMA is recorded. As an example, as shown in FIG. 15A, if TMA is recorded, the determination here is affirmed, and the routine proceeds to step 803.

  In this step 803, as shown in FIG. 15B as an example, user data is overwritten on the TMA recorded in each recording layer.

  In the next step 807, it is determined whether or not recording of all designated user data has been completed. If unrecorded user data exists, the determination here is denied and the routine proceeds to step 809.

  In this step 809, user data is recorded on each recording layer by the alternate recording method as described above. Then, the process returns to step 807 at a predetermined timing (for example, when recording for one ECC block is completed).

  Note that in step 801, as shown in FIG. 16A as an example, if no TMA is recorded, the determination here is denied and the routine proceeds to step 805.

  In this step 805, as shown in FIG. 16B as an example, user data is overwritten on the TLO recorded in the recording layer L1. Then, the process proceeds to step 807 described above.

  As is clear from the above description, in the optical disk device 20 according to the present embodiment, the optical pickup device 23, the laser control circuit 24, the encoder 25, and the reproduction signal processing circuit 28 constitute a processing device.

  Further, the control device is realized by the CPU 40 and a program executed by the CPU 40. Note that at least a part of the control device realized by processing according to the program by the CPU 40 may be configured by hardware, or all may be configured by hardware.

  In the present embodiment, the program according to the present invention is executed by executing the program corresponding to FIG. 9 among the programs recorded in the flash memory 39 as the recording medium.

  And the recording method based on this invention is implemented by the said close process.

  As described above, according to the optical disc apparatus 20 according to the present embodiment, the host device 90 closes the optical disc 15 having two recording layers each provided with the intermediate area and the rewritable data area. When the request command is received, the TMA is recorded in each data area and in an area at the same radius position as the area adjacent to the outer peripheral side of the recorded portion located on the outermost peripheral side in the optical disc 15. Thus, compatibility with a DVD-ROM which is a reproduction-only information recording medium can be provided without performing a process of writing dummy data in all unrecorded parts existing in each data area. Therefore, it becomes possible to give compatibility with a read-only information recording medium in a short time to an information recording medium having a plurality of rewritable recording layers.

  Further, according to the present embodiment, prior to recording each TMA, whether or not there is an unrecorded portion in each data area on the inner circumference side of the radial position of the recorded portion located on the outermost circumference side on the optical disc 15. If there is an unrecorded portion as a result of the determination, dummy data is recorded in the unrecorded portion. Thereby, even if user data is recorded at random, compatibility with DVD-ROM can be provided.

  Further, according to the present embodiment, prior to recording each TMA, is the radial position of the recorded part located on the outermost side on the optical disc 15 closer to the inner circumference side than the preset radial position? If the radius position of the recorded part located on the outermost peripheral side is on the inner peripheral side with respect to the preset radial position, the innermost peripheral side in each data area is determined. Dummy data is recorded in an unrecorded portion existing from a predetermined radial position to a preset radial position. As a result, stable reproduction is possible even with a read-only drive device in which normal reproduction is not guaranteed if the size of the recorded part is smaller than the size of the unrecorded part. In addition, compatibility with an optical disc having a diameter of 30 mm is possible, although it is not yet commercially available.

  Further, according to the present embodiment, temporary termination information is recorded on the optical disc 15. As a result, when the closed optical disk 15 is set in the optical disk apparatus 20 again, it is possible to quickly acquire information relating to the recorded part. Note that the user may be able to select whether the recorded termination area is temporary termination information or normal termination information.

  Further, according to the present embodiment, the position information where the TMA is recorded is recorded on the optical disc 15. Thus, when the closed optical disk 15 is set in the optical disk device 20 again, it can be immediately known that the TMA is recorded. Further, when the recording of user data is resumed, the position where the user data is overwritten can be quickly acquired. Further, when the closed optical disk 15 is set in another information recording apparatus, the state of the optical disk 15 (the area used, etc.) can be easily known. For example, the format restart can be immediately executed. It becomes possible. That is, a quick response is possible.

  Further, according to the present embodiment, when the size of the unrecorded portion on the outer peripheral side adjacent to the recorded portion located on the outermost peripheral side in the optical disc 15 is less than the size of TMA, dummy data is stored in the unrecorded portion. After writing, predetermined information is recorded in each intermediate area. As a result, in the close process, the processing time is slightly longer than when TMA is recorded in the unrecorded portion, but when user data recording is resumed after the close process, predetermined information is recorded in the intermediate area. This eliminates the need to reduce the total processing time.

  In the above-described embodiment, the case where the recording layer in the information recording medium compliant with the DVD + RW standard is formed as the optical disk 15 has been described. However, the present invention is not limited to this. In short, any disk-shaped information recording medium having a plurality of recording layers each provided with an intermediate area and a rewritable data area may be used.

  Moreover, although the said embodiment demonstrated the case where the optical disk 15 had two recording layers, it may have not only this but three or more recording layers.

  In the above embodiment, the TMA position information and temporary termination information are recorded after the TMA is recorded in the closing process. However, the order in which these are recorded can be arbitrarily set.

  In the above embodiment, the program according to the present invention is recorded in the flash memory 39, but is recorded in another recording medium (CD, magneto-optical disk, DVD, memory card, USB memory, flexible disk, etc.). May be. In this case, the program according to the present invention is loaded into the flash memory 39 via the playback device (or dedicated interface) corresponding to each recording medium. Further, the program according to the present invention may be transferred to the flash memory 39 via a network (LAN, intranet, Internet, etc.). In short, the program according to the present invention may be loaded into the flash memory 39.

  In the above embodiment, the case where the optical pickup device includes one semiconductor laser has been described. However, the present invention is not limited thereto, and for example, a plurality of semiconductor lasers that emit light beams having different wavelengths may be included. In this case, for example, at least one of a semiconductor laser that emits a light beam with a wavelength of about 405 nm, a semiconductor laser that emits a light beam with a wavelength of about 660 nm, and a semiconductor laser that emits a light beam with a wavelength of about 780 nm may be included. . That is, the optical disk apparatus may be an optical disk apparatus that supports a plurality of types of optical disks that conform to different standards. In this case, at least one of the optical discs may be an optical disc having a plurality of recording layers each provided with an intermediate area and a rewritable data area.

  In the above embodiment, the optical disk apparatus capable of recording and reproducing information has been described. However, the present invention is not limited to this, and any optical disk apparatus capable of recording at least among recording, erasing and reproduction of information may be used.

  In the above-described embodiment, the case where each interface conforms to the ATAPI standard has been described. However, the present invention is not limited to this. For example, ATA (AT Attachment), SCSI (Small Computer System Interface), USB (Universal Serial Bus) 1. 0, USB2.0, IEEE1284, IEEE1394, IEEE802.3, serial ATA, and serial ATAPI may be used.

  In the above embodiment, the optical disk apparatus is described as the information recording apparatus. However, the present invention is not limited to this, and for example, a DVD recorder having the same function as the optical disk apparatus 20 may be used.

  As described above, according to the recording method of the present invention, read-only information is recorded in a short time on an information recording medium having a plurality of rewritable recording layers in which recorded areas and unrecorded areas are mixed. Suitable for providing compatibility with a recording medium. Further, according to the information recording apparatus of the present invention, an information recording medium having a plurality of rewritable recording layers in which an already recorded area and an unrecorded area are mixed can be reproduced in a short time. It is suitable for giving compatibility. Further, according to the program and the storage medium of the present invention, the information recording apparatus can reproduce in a short time on an information recording medium having a plurality of rewritable recording layers in which recorded areas and unrecorded areas are mixed. It is suitable for providing compatibility with a dedicated information recording medium.

It is a block diagram which shows the structure of the optical disk apparatus as an information recording device concerning one Embodiment of this invention. It is a figure for demonstrating the optical disk in FIG. It is a figure for demonstrating the OTP system in a single-sided double layer disk. It is a figure for demonstrating the PTP system in a single-sided double layer disk. It is a flowchart for demonstrating a format process. 6 (A) to 6 (C) are diagrams for explaining the formatting process of FIG. It is a flowchart for demonstrating a recording process. 8A to 8C are diagrams for explaining the recording process of FIG. It is a flowchart for demonstrating a close process. FIGS. 10A to 10C are diagrams (No. 1) for explaining the close process of FIG. FIGS. 11A to 11C are diagrams (part 2) for explaining the close process of FIG. 9. FIGS. 12A to 12C are diagrams (No. 3) for explaining the close process of FIG. 9. FIGS. 13A and 13B are diagrams (No. 4) for explaining the close process of FIG. 9. It is a flowchart for demonstrating the re-recording process with respect to the optical disk once closed. FIGS. 15A and 15B are diagrams (part 1) for explaining the re-recording process of FIG. FIGS. 16A and 16B are views (part 2) for explaining the re-recording process of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 15 ... Optical disk (information recording medium), 20 ... Optical disk apparatus (information recording device), 23 ... Optical pick-up apparatus (a part of processing apparatus), 24 ... Laser control circuit (a part of processing apparatus), 25 ... Encoder (process) Part of apparatus), 28... Reproduction signal processing circuit (part of processing apparatus), 39... Flash memory (recording medium), 40.

Claims (17)

A recording method for recording information on a disc-shaped information recording medium having a plurality of recording layers each provided with an intermediate area and a rewritable data area,
When temporarily recording user data on the information recording medium,
A step of recording information indicating a temporary intermediate area in an area at the same radial position in each data area based on information relating to at least one of a recorded area and an unrecorded area in each data area of the information recording medium. Recording method.   In the step of recording information indicating the temporary intermediate area, the temporary intermediate area is located in an area at the same radial position as the area adjacent to the outer peripheral side of the recorded portion located on the outermost peripheral side of the information recording medium. The recording method according to claim 1, wherein information indicating each is recorded. Prior to the step of recording information indicating the temporary intermediate area, there is an unrecorded part in each data area on the inner circumference side of the radial position of the recorded part located on the outermost circumference side in the information recording medium. Determining whether or not to do;
The recording method according to claim 2, further comprising: recording dummy data in the unrecorded portion when the unrecorded portion exists as a result of the determination. Prior to the step of recording the information indicating the temporary intermediate area, the radial position of the recorded portion located on the outermost peripheral side of the information recording medium is set on the inner peripheral side of the preset radial position. Determining whether or not there is;
As a result of the determination, when the radial position of the recorded portion located on the outermost circumferential side is on the inner circumferential side with respect to the preset radial position, the radial position from the innermost circumferential side in each data area The recording method according to claim 2, further comprising: recording dummy data in an unrecorded portion existing up to a preset radial position. Prior to the step of recording the information indicating the temporary intermediate area, the size of the non-recorded portion on the outer peripheral side adjacent to the recorded portion located on the outermost peripheral side of the information recording medium is the temporary recording area. Further comprising determining whether or not the size of the information indicating the intermediate area is greater than or equal to
If the size of the non-recorded portion on the outer peripheral side adjacent to the recorded portion located on the outermost peripheral side is equal to or larger than the size of the information indicating the temporary intermediate region, the temporary intermediate region is The recording method according to claim 2, wherein a step of recording each of the indicated information is executed.   The recording method according to claim 1, further comprising a step of recording temporary termination information on the information recording medium.   The recording method according to claim 1, further comprising a step of recording position information in which information indicating the temporary intermediate area is recorded on the information recording medium. A program used for an information recording apparatus capable of recording information on a disc-shaped information recording medium having a plurality of recording layers each provided with an intermediate area and a rewritable data area,
A procedure for recording information indicating a temporary intermediate area in an area of the same radial position in each data area based on information relating to at least one of a recorded area and an unrecorded area in each data area of the information recording medium Is executed by the control computer of the information recording apparatus.   A computer-readable recording medium on which the program according to claim 8 is recorded. An information recording apparatus capable of recording information on a disc-shaped information recording medium having a plurality of recording layers each provided with an intermediate area and a rewritable data area,
A processing device for writing information to the information recording medium;
When the recording of user data on the information recording medium is temporarily completed, the same information in each data area is obtained based on information on at least one of the recorded part and the unrecorded part in each data area of the information recording medium. An information recording device comprising: a control device that records information indicating a temporary intermediate region in the radial position region via the processing device.   The control device sends information indicating the temporary intermediate region to the region at the same radial position as the region adjacent to the outer peripheral side of the recorded portion located on the outermost peripheral side in the information recording medium via the processing device. The information recording apparatus according to claim 10, wherein each information recording is performed.   Prior to recording information indicating the temporary intermediate area, the control device further includes each data area on the inner circumference side from the radial position of the recorded part located on the outermost circumference side in the information recording medium. 12. The information recording apparatus according to claim 11, wherein when there is an unrecorded part, dummy data is recorded in the unrecorded part via the processing device.   The control device may further include a radius position of a pre-set radius position of the recorded portion located on the outermost peripheral side of the information recording medium prior to recording information indicating the temporary intermediate area. In each data area, dummy data is recorded via the processing device in an unrecorded portion existing from the innermost radial position to the preset radial position in each data area. The information recording apparatus according to claim 11, wherein:   When the size of the non-recorded portion on the outer peripheral side adjacent to the recorded portion located on the outermost peripheral side in the information recording medium is equal to or larger than the size of the information indicating the temporary intermediate area, the control device, The information recording apparatus according to claim 11, wherein information indicating the temporary intermediate area is recorded.   The information recording apparatus according to claim 10, wherein the control apparatus further records temporary termination information on the information recording medium via the processing apparatus.   The said control apparatus further records the positional information on which the information which shows the said temporary intermediate | middle area | region was recorded on the said information recording medium via the said processing apparatus. The information recording apparatus according to one item. Further, when recording the user data on the information recording medium on which the information indicating the temporary intermediate area is already recorded, the control device records the information indicating the temporary intermediate area on the user data. The information recording apparatus according to any one of claims 10 to 16, wherein the recorded area is overwritten.

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