JP2003263842A - Information recorder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information recorder which assures normal reproduction of a fetched information recording medium by a DVD-ROM drive even when a recording data size is small, and is also capable of writing once by a multi- session system. <P>SOLUTION: When a session is requested to close, the information recorder judges the data recording size, and when the data recording size is smaller than a disk radius position R=35 mm, the information recorder writes once a track (N+3) to record a dummy data so that a Lead-Out end address is the disk radius position R=35 mm, and finally performs session close processing by adding Lead Out. Moreover, to satisfy (DVD+R) specification, SDBC is updated by adding the information of the track (N+3) thereto. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording device for recording on a recordable information recording medium such as a DVD + R.

[0002]

2. Description of the Related Art In recent years, personal computers (PCs)
A, such as music and video, as the function improves
It is becoming possible to handle V (Audio-Visual) information. Since such AV information has a very large amount of information, it is used as a DVD (Digital Veta) as an information recording medium.
Rsatile Disc) type optical discs have come to the forefront, and as their prices have come down, optical disc devices as information recording / reproducing devices have become popular as one of the peripheral devices of PCs.

As a DVD-type recordable disc, a DVD
There are discs such as + R (Recordable) and DVD + RW (Rewritable). These physical properties are DVD-RO
It is a disc close to the M disc and excellent in compatibility with DVD-ROM drives.

When recording data on a DVD + RW, it is necessary to perform a process called "format" before recording the data. Conventionally, the formatting process is a process of recording the entire surface of the disc with dummy data, and therefore, a huge amount of time was required before recording the data. However, in the DVD + RW format processing, the user can request data recording, reproduction, etc. by only recording the minimum required area for data recording, and the remaining area uses the time during which there is no access from the user. The drive uses a so-called background format in which the unrecorded area is recorded in the background with dummy data, and the time required for formatting the conventional disk is significantly reduced. Further, during the background format, it is possible to take out the disc before the entire surface of the disc is recorded. At this time,
In order to be compatible with a DVD-ROM drive, a mode is prepared in which the temporary lead-out is recorded from the final recording address and the disc is taken out before the disc is ejected.

On the other hand, the DVD + R is a write-once disc in which data cannot be rewritten, and it is necessary to record data sequentially. In order to make the DVD-ROM drive read the data added in file units,
It is a general method that an area for recording file information is reserved in advance at the beginning of a session and the file information of recording data is recorded in the reserved area when the session is closed.

As described above, in order to record data on a DVD + R, it is necessary to record sequentially from the inner circumference of the disc. However, by dividing the recording area into a plurality of tracks (called a fragment in DVD + R), the session can be recorded. It is possible to record the head area later. Further, even when the session is closed, it is possible to add data after the session is closed by adding a new session. As described above, the DVD + R adopts the multi-track, multi-session recording method.

In DVD + R, when a track is added,
Track information is recorded in an area called a session disc control block (SDCB) of the lead-in. SDCB
Includes information on all tracks in the session, information on all sessions preceding the session, and the like.
The SDCB is updated every time a track is added and additionally recorded in a new area. Since there is an area for updating SDCB 16 times in the lead-in area, the maximum 16 tracks can be recorded in the session.

[0008]

By the way, the DVD-R
In the OM disc, data is supposed to be recorded up to a radial position of 35 mm on the disc. So if you record a small amount of data and close the session,
In the DVD-ROM drive, there are discs that cannot be read normally.

In the case of a DVD + RW disc, if the session is closed without recording a predetermined amount of data in consideration of such a case, dummy data is recorded up to a predetermined position and then a (temporary) lead-out is recorded. Modes are prepared.

That is, when the user issues a disk ejection request during the background format, the dummy data recording or the user data recording size is checked, and if the recording size is smaller than the predetermined amount, the predetermined recording area is dummyed. After recording with data, add temporary read out and remove the disc. Therefore, even if the data recording capacity is small, the ejected disc is a DVD.
-It is possible to guarantee that the ROM drive can be read normally.

Further, in the case of a DVD-R / RW disc or the like, when the session is closed below a predetermined recording capacity, the lead-out area is recorded up to a predetermined area. Also for DVD + RW, an information recording / reproducing apparatus has been proposed in which the length of temporary read-out is variable.

However, with respect to the DVD + R, there is no mode for ensuring compatibility with such a DVD-ROM drive at the time of session closing,
Even if the recording capacity is small, only the specified lead-out is recorded and the session is closed, and the session-closed disc may not be normally read by the DVD-ROM drive.

For example, in DVD + RW, since there is no concept of a track like DVD + R, if the data recording size is small when the disc is taken out, it is sufficient to continue the background formatting until a predetermined area and then add the temporary lead-out. When the session is closed, data recording must be completed for all tracks in the open session. At this time, since track information (number of tracks, start and end addresses of tracks, etc.) in the session is recorded in the SDCB of the lead-in, dummy data is simply written from the final recording position to a predetermined position like DVD + RW. It is not possible to record and add a lead-out.

Further, by recording the lead-out to a predetermined position like a DVD-R / RW disc, the D
To guarantee reading with a VD-ROM drive,
It is possible only when the session is closed in the mode that does not add data. This is because the data recording of the new session is supposed to start from a predetermined offset position from the end address of the immediately preceding session. In consideration of the multi-session recording, increasing the length of the lead-out is contrary to the DVD + R standard, and it becomes impossible to additionally write data.

The present invention provides an information recording apparatus which guarantees that the information recording medium taken out can be normally reproduced by the DVD-ROM drive even when the recording data size is small, and which can be additionally recorded by the multi-session method. The purpose is to

[0016]

The invention according to claim 1 is
A recording unit that divides the information recording medium into a plurality of recording sections and divides each recording section into a plurality of recording blocks for recording, and records data up to a predetermined area in the ending process of each recording section. If it is judged by the judging means that the data is not recorded up to a predetermined area in the recording division end processing, a recording block is newly added up to the predetermined area and dummy data is added. And an additional end processing unit for performing the end processing of the recording division.

Therefore, by executing the dummy data recording up to a predetermined area by additionally recording the recording block, for example, D
A recording area can be added without violating the VD + R standard, and even if the recording data amount is small, up to a predetermined area is recorded.
-It is possible to guarantee reading with a ROM drive. Also, since the dummy data is added as user data instead of being read out, it does not hinder the multi-session recording.

According to a second aspect of the present invention, in the information recording apparatus according to the first aspect, the information recording medium is DVD + R.
Is an information recording medium compliant with the standard, the addition end processing means, when a session close request from the user,
When it is judged by the judging means that the data has not been recorded up to a predetermined area, a track is newly added as a recording block, dummy data is recorded, and a lead-out is added.

Therefore, specifically, under the situation where an information recording medium conforming to the DVD + R standard is to be recorded,
A recording area can be added without violating the DVD + R standard, and the session can be closed by lead-out.

According to a third aspect of the present invention, in the information recording apparatus according to the first or second aspect, it is determined whether or not the judging means records data by setting a predetermined area up to a predetermined radial position of the information recording medium. to decide.

Therefore, for example, the condition of being reproducible by the target drive can be defined by the threshold value of the predetermined radial position, and the reading by the drive can be guaranteed.

According to a fourth aspect of the present invention, in the information recording apparatus according to the first or second aspect, the determining means determines a predetermined area from a radial position of 35 mm of the information recording medium to a position obtained by subtracting the lead-out size. As to whether or not the data recording is performed.

Therefore, it is possible to specifically guarantee the reading in the current DVD-ROM drive.

According to a fifth aspect of the present invention, in the information recording apparatus according to the first or second aspect, the information recording medium is a DVD + R recorded on an SDCB (session disc control block) as a predetermined management information area for data recording. It is an information recording medium compliant with the standard (1), and has a reporting means for reporting an error when the area for updating the SDCB does not exist when the user requests a session close.

Therefore, in order to additionally record a track when the session is closed, there must be an area for additionally recording SDCB in the lead-in, but if there is no space in the area for updating SDCB, an error report is issued to the user. This makes it possible to avoid the creation of an information recording medium that violates the DVD + R standard.

According to a sixth aspect of the present invention, in the information recording apparatus according to the first or second aspect, the information recording medium is a DVD + R recorded in an SDCB (session disc control block) as a predetermined management information area for data recording. When the dummy data recording is performed by changing the size of the last track as a recording block, the additional end processing means changes the end address of the last track and the SDC.
Update B.

Therefore, when a track is added, an SDCB including all track information existing in the session is newly recorded, so that it is recorded in the outermost circumference of a plurality of SDCBs existing in the lead-in. Since the existing SDCB becomes a valid SDCB, a predetermined area is recorded as dummy data when the session is closed, and the SDCB information added as a new track to the area is newly added, but the SDCB information is updated as a new track. Instead, the SDCB may be updated by changing the size of the final track. That is, when the end address of the last track is changed to the last address where the dummy data is recorded when the session is closed and SDCB is updated, the dummy data recording can be performed without changing the number of tracks in the session. Become. In this case, since track recording is not performed by dummy data recording, it is possible to prevent a track that is not intended by the user from being generated in the session.

The invention according to claim 7 is the invention according to claims 1 to 6.
In the information recording apparatus according to any one of the above, the presence or absence of execution of processing by the addition end processing means can be freely selected.

Therefore, even if the information recording medium is closed by a session with a predetermined data amount or less, all DVs are recorded.
It cannot be reproduced by a D-ROM drive, and while the dummy data recording enhances the compatibility with the DVD-ROM, it also has the drawback of increasing the processing time due to the dummy data recording. By allowing the user to select whether or not to record the dummy data up to, it is possible to close the session in a method desired by the user.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a first embodiment of the present invention.
Or, it demonstrates based on FIG. FIG. 1 is a block diagram showing a schematic configuration of an optical disc device 1 as an information recording device according to the present embodiment.

The optical disc device 1 includes a spindle motor 3 for rotating an optical disc 2 serving 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, Buffer RAM 9, buffer manager 10, interface 11, ROM 12, CPU 1
3 and RAM 14 and the like. In addition,
The arrows shown in FIG. 1 show typical signal and information flows, and do not show all the connection relations of each block.

More specifically, first, as the optical disc 2, an information recording medium (hereinafter, referred to as a DVD + R standard compliant recording medium)
This is simply referred to as DVD + R).

The optical pickup device 4 guides the semiconductor laser as a light source and the laser light emitted from the semiconductor laser to the recording surface of the optical disc 2 and the return light reflected by the recording surface to a predetermined light receiving position. And the like, an optical system arranged at a light receiving position for receiving return light, and a drive system (focusing actuator, tracking actuator, seek motor, etc.) (all not shown), etc. . From the light receiver, a current (current signal) corresponding to the amount of light received 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 a control signal for controlling the tracking actuator of the optical pickup device 4 based on the track error signal. To generate. These control signals are sent to the servo controller 8
Output to the motor driver 6.

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

The interface 11 is a bidirectional communication interface with a host (for example, a PC) which is an external device, and conforms to standard interfaces such as ATAPI and SCSI.

The CPU 13 constitutes, together with the ROM 12 and the RAM 14, a microcomputer (computer) included in the optical disc apparatus 1. The ROM 12, which also functions as a storage medium, stores a program including a control program, which will be described later and is written in a code readable by the CPU 13. CPU13 is RO
The operation of each unit described above is controlled according to the program stored in M12, and the data and the like necessary for control are temporarily stored in the RAM 14. When the power of the optical disk device 1 is turned on, the programs stored in the ROM 12 are loaded (installed) in the main memory (not shown) of the CPU 13. This CPU 13
As one of the control processes by the, as will be described later, a process of checking the data recording capacity when the session is closed, and adding a new track to a predetermined area to close the session if the data recording capacity is small. It is included.

Next, an example of the multi-session format of the DVD + R which is the optical disc 2 of the present embodiment will be described with reference to the schematic diagram shown in FIG. In addition,
As a file system on the optical disc 2,
It shall comply with the sequential UDF standard.

In the example shown in FIG. 2, for simplification of explanation, for example, a session (open session or closed session) Session N as one recording section existing on the optical disc 2 is shown. In this session Session N, three tracks (fragments in DVD + R) N, N + 1, N + 2 as recording blocks are recorded.
Shows the case where exists. In addition, a session disc control block SDCB (Session Disc) serving as a management information region in a predetermined area of the session Session N, for example, lead-in (or intro).
A control block is newly secured each time the data recording of the session Session N is completed, and management information regarding the data recording is recorded.

Here, the principle of the session closing operation at the time of recording on the optical disc 2 of the present embodiment will be briefly described with reference to FIG. Figure 2 shows DVD + R
3 schematically shows the state of dummy data recording when the session is closed on the optical disc 2. In the present embodiment, the threshold value for a predetermined area for performing dummy data recording is set to a disk radial position of 35 mm as an example. When there is a session close request from the user, conventionally, the lead-out (Lead Out) start position is used as the end address of the user data as shown in FIG. 2A, but in the present embodiment, the data recording size is changed. Judged that the data recording size is the disk radial position R = 35.
If it is smaller than mm, as shown in FIG. 2B, a new track N + 3 is additionally recorded and dummy data is recorded so that the end address of the lead-out (Lead Out) becomes the disk radial position R = 35 mm. At the end, a lead-out (Lead Out) is added so that the session close process is performed. At the time of such track recording, in order to satisfy the DVD + R standard, information of track N + 3 is added to SDCB and updated.

FIG. 3 shows an example of such SDCB format. As shown in FIG. 3, “Conte
nts Descriptor ”“ Unknown Contents Descriptor
In addition to including descriptions such as "Actions", "Driving ID", "Session Number (session number)", etc., a plurality (0 to N) of "Sessi" each consisting of 16 bytes are provided as SDCB-specific information.
on Item (session item) "exists.

Such "Session Item" includes "Fragment Item" indicating fragment information in the session and "Previous Session Item" indicating session information before the session.
There are two types.

FIG. 4 shows an example of the format of "Fragment Item". During the format of "Fragment Item", "Fragment number" and "Fra
gmentstart address ”
Fragment information such as "Fragment end address" is set as the management information. Such a "Fragment Ite"
“M” is prepared as one of “Session Item” for each fragment existing in the session. In the example shown in FIG. 2, three “F” from N to N + 2 in FIG.
ragment Item ”exists, but N to N in FIG.
There are four "Fragment Items" of +3.

FIG. 5 shows a format example of the "Previous Session Item". In the format of "Previous Session Item", "Previous session number" and "Previous session start ad"
dress (starting address of the previous session) “Pr
The session information such as "evious session end address" is set to be described as the management information.
An “ous Session Item” is prepared as one of “Session Item” for each session existing before the session. In the case of the example shown in FIG.
Each DCB has (N-1) "Previous Session"
Item ”is present.

Even in such SDCB, there is a write-once area, and for example, by adding a track and a section, SDCB information is also added.

An example of control of the session closing process executed by the CPU 13 in such a configuration will be described with reference to the flowchart shown in FIG. In the recording operation, a known recording unit that divides the optical disc 2 into a plurality of sessions (recording sections) and also divides each session (recording section) into a plurality of tracks = fragments (recording blocks) for recording. The function shall be demonstrated.

First, this process is executed when the user requests the session to be closed. When the request is made, the data size that has already been recorded is checked (step S1) and the disc radius is checked. Position R =
It is determined whether or not it is 35 mm or less (S2). The processing of these steps S1 and S2 is executed by the function of the determination means, but the determination may be made based on, for example, the lead-out end address of the final session. If the data size is not equal to or less than the disk radial position R = 35 mm (N in S2), the session close processing is performed as usual (S
6) Then, the session closing process ends.

On the other hand, the data size is the disk radial position R.
= 35 mm or less (Y in S2), a new track is additionally recorded so that the disk radial position R = 35 mm including the lead-out (S4), and the newly added and recorded track information is SDCB of the session. Is updated and recorded (S5). After that, the session close processing is performed as usual (S6), and the session close processing ends. The processing of these steps S4, S5 and S6 is executed as a function of the addition end processing means.

By the way, in order to newly add a track when the session is closed, SDCB is added in the lead-in.
Since there must be an area for additional writing, if the data size is the disk radial position R = 35 mm or less (Y in S2), check whether there is an area (free area) to add SDCB to the SDCB area. (S3), S
If there is no space in the DCB area, a process of reporting an error to the user is performed (S7). The process of step S7 is executed as a function of the reporting means. In this way, SDC
If there is no space in the area where B is updated, an error report is issued to the user, so that it is possible to avoid the creation of the optical disc 2 that violates the DVD + R standard.

In the present embodiment, the current DVD-
Corresponding to the point that data is recorded up to the disc radial position of 35 mm in the ROM disc standard, the threshold for determining whether to perform dummy data recording by the process of step S4 is the disc radial position R = 35 mm.
However, some DVD + RW drives have a radius threshold of 30 mm in the DVD-ROM compatible mode in the background format. This is because reproduction compatibility with most DVD-ROM drives has been verified if data is recorded up to around 30 mm. Therefore, the predetermined radial position that is the determination threshold for performing the dummy data recording according to the present embodiment can be set to, for example, a disk radial position of 30 mm. This point is the same in the following embodiments.

As described above, according to the present embodiment, the dummy data recording up to the predetermined area (for example, the disk radial position R = 35 mm) is executed by the additional recording of the new track, so that the DVD + R standard is not violated. , A recording area can be added, and even if the recording data amount is small, a predetermined area (for example, the disk radial position R = 35 m
Since it is recorded up to m), DVD-R
Reading with the OM drive can be guaranteed. Also, since the dummy data is added as user data instead of being read out, it does not hinder the multi-session recording.

In the process control of this embodiment,
A selection mode of whether or not to execute the processing of the addition end processing means in step S4 or the like, that is, whether or not to attach importance to DVD-ROM compatibility is prepared so that the user can select the mode and the user closes the session. When there is a request, it may be first checked whether or not the user request is a mode in which DVD-ROM compatibility is emphasized (S8). As a result of this mode determination, if the mode that attaches importance to DVD-ROM compatibility is not selected (N in S8), the session close processing is performed as usual (S8).
6), the process ends. On the other hand, when the mode that attaches importance to DVD-ROM compatibility is selected (Y of S8), the above-mentioned processing is executed according to the data size.

That is, even if the optical disc 2 is closed by the session with a predetermined data amount or less, all DVDs
-It doesn't mean that you can't play with ROM drive,
Although the dummy data recording enhances compatibility with the DVD-ROM, it also has drawbacks such as an increase in processing time due to the dummy data recording. Therefore, the user can select whether to perform the dummy data recording up to a predetermined area. By doing so, it becomes possible to close the session by the method desired by the user.

A second embodiment of the present invention will be described with reference to FIG. The same parts as those shown in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

An example of control of the session closing process executed by the CPU 13 in the present embodiment will be described with reference to the flowchart shown in FIG.

First, when the user requests to close the session, the size of the data already recorded is checked (S1), and it is determined whether or not the disk radial position R = 35 mm or less (S2). If the data size is not equal to or less than the disk radial position R = 35 mm (N in S2), the session close processing is performed as usual (S
6) Then, the session closing process ends.

On the other hand, the data size is the disk radial position R.
= 35 mm or less (Y in S2), dummy data was recorded so that the disk radial position R = 35 mm including the lead-out (S9), and the end address of the last track where the track size was changed was updated. It is updated and recorded in the SDCB (S10). After that, the session close processing is performed as usual (S6), and the session close processing ends. The processing of these steps S4, S5 and S6 is executed as a function of the addition end processing means. The processing of these steps S9, S10 and S6 is executed as a function of the addition end processing means.

Here, the difference from the processing example in the first embodiment is that in the first embodiment, the dummy data recording is executed by additionally writing a new track, whereas In the embodiment, this is achieved by changing the track size of the final track.

That is, when a track is added, SDCB including all track information existing in the session is newly recorded. Therefore, of the plurality of SDCBs existing in the lead-in, the SDC recorded in the outermost circumference
B becomes a valid SDCB. In this case, in the first embodiment, up to a predetermined area is recorded with dummy data when the session is closed, and the SDCB newly added and updated as a new track in that area is newly added, but the SDCB information is updated as a new track. Instead, the SDCB may be updated by changing the track size of the final track. In other words, when the session is closed, the end address of the last track is changed to the last address where the dummy data was recorded, and SDCB is updated, so that the dummy data can be recorded without changing the number of tracks in the session. Become. According to this, since the track recording is not performed by the dummy data recording, it is possible to prevent a track not intended by the user from being generated in the session.

Although not particularly shown in FIG. 7, it goes without saying that the processing of steps S3, S7 and S8 may also be included in this embodiment.

Further, in these embodiments, the case where the optical disk 2 is a DVD + R has been described, but the present invention is not limited to this, and data is recorded while being divided into a plurality of data areas (recording blocks) such as sessions and tracks. If the information recording medium is such that management information regarding data recording is recorded in a predetermined management information area, and the management information is updated each time the predetermined data recording is completed and additionally recorded in a new management information area. Good.

Further, the optical disk device 1 of the present embodiment
May be a so-called built-in type, which is arranged in the same housing as the host, or a so-called external type, which is arranged in a housing different from the host.

Further, the case where the optical disk device is used as the information recording device has been described, but the present invention is not limited to this, and the data is recorded while being divided into a plurality of data areas such as sessions and tracks as a target medium for information recording. An information recording apparatus using an information recording medium for recording management information regarding data recording in a predetermined management information area, and updating the management information each time the predetermined data recording is completed and additionally recording the management information in a new management information area. If Of course, an information recording / reproducing apparatus having not only recording but also a reproducing function may be used.

[0064]

According to the invention described in claim 1, since the dummy data recording up to the predetermined area is executed by the additional recording of the recording block, the recording area can be added without violating the DVD + R standard, for example. Even if the amount of recorded data is small, the data is recorded up to a predetermined area, so that reading with a DVD-ROM drive can be guaranteed, and dummy data is not read out. Since it is added as user data, it does not hinder multi-session recording.

According to the second aspect of the invention, the information recording apparatus according to the first aspect violates the DVD + R standard under the situation where an information recording medium conforming to the DVD + R standard is specifically targeted for recording. Instead, a recording area can be added and the session can be closed by lead-out.

According to the third aspect of the present invention, in the information recording apparatus according to the first or second aspect, for example, the condition that can be reproduced by the target drive can be defined by a threshold value of a predetermined radial position. It is possible to guarantee reading with the drive.

According to the invention described in claim 4, in the information recording apparatus according to claim 1 or 2, specifically, the DVD-R
Reading with the OM drive can be guaranteed.

According to the fifth aspect of the invention, in the information recording apparatus according to the first or second aspect, in order to add a track when the session is closed, the SD is inserted in the lead-in.
There must be an area for adding CB, but SD
If there is no space in the area for updating the CB, it is possible to avoid creating an information recording medium that violates the DVD + R standard by reporting an error to the user.

According to the sixth aspect of the invention, in the information recording apparatus according to the first or second aspect, the SDCB is updated by changing the end address of the last track to the last address where the dummy data is recorded when the session is closed. By doing so, since it is possible to perform dummy data recording without changing the number of tracks in the session, since track recording is not performed in dummy data recording, a track that the user does not intend is generated in the session. It is possible to prevent that.

According to the invention described in claim 7, in the information recording apparatus according to any one of claims 1 to 6, the user is allowed to select whether to perform dummy data recording up to a predetermined area. You can close the session in any way you want.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of an optical disc device according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram showing an example of a multi-session format of DVD + R and a session closing principle.

FIG. 3 is an explanatory diagram showing an example format of SDCB.

FIG. 4 is an explanatory diagram showing a format example of “Fragment Item”.

FIG. 5 is an explanatory diagram showing a format example of “Previous Session Item”.

FIG. 6 is a schematic flowchart showing an example of session close processing control.

FIG. 7 is a schematic flowchart showing an example of session close processing control according to the second embodiment of the present invention.

[Explanation of symbols]

2 Information recording medium, DVD + R S1, S2 judgment means S4, S5, S6 addition end processing means S7 reporting means S9, S10, S6 addition end processing means

Claims (7)

[Claims] 1. A recording means for dividing an information recording medium into a plurality of recording sections and dividing each recording section into a plurality of recording blocks for recording, and a predetermined area in the ending process of each recording section. Up to a predetermined area, and a judgment means for judging whether data has been recorded up to a predetermined area, and when the judgment means judges that the data has not been recorded up to a predetermined area in the end processing of the recording division And an additional end processing unit for recording dummy data in addition to the above and performing the end processing of the recording division. 2. The information recording medium is an information recording medium compliant with the DVD + R standard, and the addition end processing means, when a user requests a session close, that data is not recorded up to a predetermined area. 2. The information recording apparatus according to claim 1, wherein, when judged by the judging means, a track is newly added as a recording block, dummy data is recorded, and a lead-out is added. 3. The information recording apparatus according to claim 1, wherein the determination means determines whether or not data recording has been performed with a predetermined area up to a predetermined radial position of the information recording medium. 4. The information according to claim 1, wherein the determination means determines whether or not data recording is performed with a predetermined area from a radial position of 35 mm of the information recording medium to a position obtained by subtracting the lead-out size. Recording device. 5. The information recording medium is an information recording medium compliant with the DVD + R standard recorded in an SDCB (session disc control block) as a predetermined management information area for data recording, and when a user requests a session close. 3. The information recording apparatus according to claim 1, further comprising reporting means for reporting an error when there is no area for updating the SDCB. 6. The information recording medium is an information recording medium compliant with the DVD + R standard recorded in an SDCB (session disc control block) as a predetermined management information area for data recording, and the addition end processing means is 3. The information recording apparatus according to claim 1, wherein, when dummy data recording is performed by changing the size of the last track as a recording block, the SDCB is updated by changing the end address of the last track. 7. The information recording apparatus according to claim 1, wherein execution of processing by the addition end processing means is selectable.