JP2003272158A - Information recording device, program and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten the acquisition time of a session information. <P>SOLUTION: When a session is closed, the latest TOC Blocks are added (Step A1). When a disk is set to be not recordable so that data cannot be recorded aftertime, whether an unused area exists in a TOC Zone is decided. Then, the latest TOC Blocks are recorded (step A4) when there exists the unused area. A process is completed when the unused area is not left by recording the latest TOC Blocks (step A3). <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 such as a DVD + R drive device for recording data on a write-once type information recording medium.

[0002]

2. Description of the Related Art Conventionally, there is a DVD + R disc as an information recording medium capable of recording / reproducing data. This DVD
+ R disc is a Wri that can record data only once.
This is a teOnce (non-overwritable) disc. As a data recording method, a multi-session recording method in which one disc is divided into a maximum of 191 sessions is adopted. Further, each session is divided into areas called up to 16 fragments. At the beginning of each session, a Lead-in in which fragment information and the like in the session is recorded (Int for the second session and thereafter)
called ro). Also, the Lead of the first session
Before -in, TOC (Table of Context)
There is a region called nts Zone) in which T
Session information is managed by OC Blocks.

TOC Blocks has 16 sectors (1E
CC block), and information of each session on the disc is recorded as a TOC Item. The drive device can know all the session information on the disc by playing the TOC Blocks. The TOC Blocks is a TOC Item in which information of the previous TOC Item and the newly added session is recorded every time a session is added.
Is added in addition. Drive device is the last TOC
By reproducing Blocks, all session information on the disc can be obtained. When the disc is not closed (additional recording is not possible) and additional recording of the session is possible, the area next to the last TOC Blocks is unwritten and the RF signal (Radio Frequency
ncy) is not present. Therefore, when the disc is not closed, the TOC Blocks immediately before the RF signal in the TOC is the latest information.

However, when the disc is closed so that additional data cannot be written, the unused area of the TOC is filled with predetermined data (for example, all "0" is written), so that the last TOC Blocks are written. The only way to find out is to play them in order from the beginning. Therefore, it takes time when there are many sessions on the disc.

[0005]

For example, in a CD-R disc, which is the same Write Once as the DVD + R disc, a PMA is recorded as an area for recording all track information on the disc by multi-session multi-track recording. There is an area called. Then, every time a track is additionally recorded, information on a new track is additionally recorded in the PMA (see Japanese Patent Laid-Open No. 5-265833).

However, in the CD-R disc, since the unused area of the PMA is not filled with predetermined data when the disc is closed, the area next to the information written at the end of the PMA is an unwritten portion. , Search can be done relatively fast. Further, since the maximum number of tracks of the CD-R disc is 99, even if the PMA is read from the beginning, it does not take much time.

On the other hand, the maximum number of sessions of the DVD + R disc is 191 and, as described above, the T
If the OC is read from the beginning, it takes time to acquire the session information.

An object of the present invention is to provide an information recording device, a program, and a recording medium that shorten the acquisition time of session information.

[0009]

According to the present invention, there is provided means for recording data in a data area of a write-once type information recording medium for each recording unit (session), and a table of contents area (T) of the recording medium.
Means for recording information on the recording unit in the OC zone) in block units, and every time a new recording unit is added to the data area, the new recording unit and all the recordings recorded before that are recorded in the table of contents area. A unit for recording information about a unit as a block unit, and recording information about all recording units in the data area in a block unit with respect to an unused area of the table of contents area when recording of data is disabled. And means for doing so.

According to the present invention, in a DVD + R drive device for recording / reproducing data on / from a DVD + R disc,
When closing the disc (additional recording is not possible), the unused area of the TOC is the TOC in which the final session information is recorded.
It has a means to fill with Blocks.

According to the present invention, in a DVD + R drive device for recording / reproducing data on / from a DVD + R disc,
When closing the disk, a means is provided for filling the unused area of the TOC with predetermined data and filling the last 1ECC block with the last TOC Blocks.

According to the present invention, in a DVD + R drive device for recording / reproducing data on / from a DVD + R disc,
When closing the disc, the last valid TO in each sector or ECC block in the unused area of the TOC.
A means for recording the address where C Blocks are recorded is provided.

According to the present invention, in the DVD + R drive device, when the disc is closed, the last valid T
There is provided means for recording the address where OC Blocks are recorded at a predetermined location other than the unused sector or the beginning position in the ECC block.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 1 shows the DVD + R of the present invention.
The structure of a drive device is shown. The DVD + R drive device includes a motor 2 that rotates the DVD + R disc 1 at an arbitrary rotation speed, and a rotation control unit 3 that controls the motor 2.
Is equipped with. Further, a pickup 4 that irradiates the DVD + R disc 1 with an optical laser, a laser drive circuit 9 that drives the optical laser of the pickup 4, and a pickup 4
An actuator control unit 5 for controlling the movement of the pickup in the radial direction and a signal control unit 6 for controlling a signal from the pickup 4 are provided.

Further, it comprises an external interface 10 for exchanging signals with the host computer 11, a buffer memory 8 as a temporary storage place for data and the like, and a drive controller 7 for controlling the entire drive device.

The DVD + R drive device can record / reproduce data on / from a DVD + R disc as shown in FIG. FIG. 2 shows the structure of a DVD + R disc. From the inner circumference, the drive calibration area I
nner Drive Area 12, Lead-in Zone 13, which is an area for recording the fragment information in the session and indicating the beginning of the session.
Data Zone 14 which is an area for recording user data and which is composed of a maximum of 16 fragments, and Closure 1 which is an area indicating the end of the session.
5 (referred to as Closure before the final session), Intro 16 which is the area indicating the beginning of the session
Lead-out Zo, which is an area indicating the end of the session (the second and subsequent sessions are called Intro).
ne 17 and an Outer Drive Area 18 that is a drive calibration area. Session 19 includes Lead-in (Intro after the second session), Data Zone, and Lead.
A maximum of 191 discs can be recorded per disc in one unit of -out (Close before the last session).

User data is recorded in the Data Zone 14 in a unit called 1 to a maximum of 16 fragments, and the fragment information in the session 19 is L
It is recorded in ead-in Zone 13 and Intro 16. ECC recording / reproduction of data on DVD
Done in blocks. One ECC block has 16 sectors.

FIG. 3 shows the Inner Drive Are
The structure of a12 is shown. InnerDrive Are
a12, Initial Zone, Inner
Disc Test Zone, Inner Disc
Count Zone, Inner Disc Ad
ministration Zone, TOC (Tab
There is the le of Contents Zone). I
nner Disc Test Zone, Inner
The Disc Count Zone is a calibration area, and the DVD + R drive device is a DVD + R.
When recording on the disc 1 for the first time, laser power calibration (OPC) is performed in the area, and D
An appropriate recording power is set for the VD + R disc 1.

FIG. 4 shows TOC Blocks and TOC.
The structure of Item is shown. TOC Bloc for TOC
ks is recorded, and session information is recorded in TOC Item included in TOC Blocks.
Each time a session is added, TOC Blocks added with the TOC Item corresponding to the session are added. TOC Blo where the final session was recorded
Information of all sessions 19 included in the DVD + R disc 1 is recorded in cks.

FIG. 5 shows the detailed structure of the TOC Blocks. TOC Blocks recorded in TOC
Is recorded for every 1 ECC block (16 sectors). Of these 16 sectors, data is actually recorded only in the first sector, and the other 15 sectors are reserved.
It is d (all "0" data). One sector is 2048 bytes.

This one ECC block is one TOC B
These TOC Blocks are added to the TOC area every time a TOC Item is added. FIG. 6 shows a state before and after addition of TOC Blocks. Note that the maximum number of ECC blocks secured in the TOC area is predetermined.

As described in the prior art, in the normal sequence, when the disc is closed, the remaining unused area of the TOC is filled with dummy data (all 0s). FIG. 7 shows a state in which the disc is closed from the state of additional recording. In the closed state as shown in FIG. 7, it takes time to read the last TOC Blocks in order from the beginning in order to search for the last TOC Blocks.

(Embodiment 1) FIG. 8 shows an operation flowchart of a DVD + R drive device according to Embodiment 1 of the present invention. When closing the session, the latest TOC
Blocks are additionally written (step A1). If additional recording is set so that data can be recorded on the disc thereafter (No in step A2), this process is not performed and the process ends.

If the disc is set to be non-recordable so that data cannot be recorded in the future (Yes in step A2), it is determined whether or not there is an unused area in the TOC Zone (step S2). A3). If there is no unused area (No in step A3), this process ends. If there is an unused area (Yes in step A3), the latest (last) TOC Blocks
Is recorded (step A4). When there are no unused areas (No in step A3), this process ends. FIG. 9 shows a state in which the recordable state is closed by the process of the first embodiment. According to the processing of the first embodiment, TO
In the unused area of C, the last (latest) TOC Bloc
A plurality of ks are recorded.

(Second Embodiment) FIG. 10 shows a second embodiment of the present invention.
3 shows an operation flowchart of the DVD + R drive device according to the present invention. When closing the session, the latest TOC
Blocks are additionally written (step B1). If additional recording is possible so that data can be recorded on the disc thereafter (No in step B2),
The present processing is ended without performing this processing.

When the disc is set to be non-recordable so that data cannot be recorded in the future (Yes in step B2), it is determined whether or not there is an unused area in the TOC Zone (step S2). B3). TOC
If it is determined that there is an unused area in the Zone (Yes in step B3), the unused area is the TOC.
It is determined whether it is the last ECC block (maximum value of the number of ECC blocks) of the Zone area (step B4),
If it is not the last ECC block (No in step B4), the predetermined data (all 0) is recorded (step B5). If it is the last ECC block in the TOCZone area (Yes in step B4), the latest (last)
The TOC Blocks of are recorded (step B6), and this processing ends. FIG. 11 shows a state in which the recordable state has been closed by the process of the second embodiment. Example 2
Process, the unused area of the TOC is filled with dummy data, and the last 1ECC block is the last (latest) TOC.
Filled with Blocks.

(Third Embodiment) FIG. 12 shows a third embodiment of the present invention.
3 shows an operation flowchart of the DVD + R drive device according to the present invention. When closing the session, the latest TOC
Blocks are additionally written (step C1). If the disc is set to allow additional recording so that data can be recorded thereafter (No in step C2),
The present processing is ended without performing this processing.

When it is set to the disk that additional recording is not possible so that data cannot be recorded in the future (Yes in Step C2), it is determined whether or not there is an unused area in the TOC Zone (Step S2). C3). TOC
When it is determined that there is an unused area in the Zone (Yes in step C3), the last T is set in the unused area.
The address of OC Blocks is recorded (step C4). When there are no unused areas in the TOC Zone area, this processing ends. FIG. 13 shows a state in which the TOC Blocks are closed by the processing of the third embodiment, and the addresses of the last TOC Blocks are recorded in each sector (16 sectors) of the dummy data that fills the unused area of the TOC when the disc is closed. The address may be recorded only in the head sector of one ECC block.

(Fourth Embodiment) In the above-mentioned third embodiment, just
The address information is recorded at the location where the Content Descriptor is recorded. actually,
Since the data recorded in the Content Descriptor is fixed, the address information may not be the same, but normally, Content Descriptor
Since other data is recorded at the location where r or dummy data is recorded, there is a possibility of making a mistake. In such a case, wrong session information will be acquired.

Therefore, in the fourth embodiment, the last TOC B
When the locks address is recorded, it is recorded at a position other than the unused sector or the beginning position in the ECC block. An operation flowchart of the DVD + R drive device according to the fourth embodiment is shown in FIG.
Same as 2). FIG. 14 shows the state of being closed by the processing of the fourth embodiment, which is the final TOC Blocks.
Is recorded from the 12th byte, for example, not at the head position.

It is needless to say that the present invention can be realized by either the processing by executing the drive controller (hardware) or the processing by executing the program (software) in the drive controller.

[0032]

As described above, according to the present invention, the following effects can be obtained. (1) By reproducing TOC Blocks located behind the TOC, all session information on the disc can be acquired, and the acquisition time of the session information can be greatly shortened. (2) By reproducing the one ECC block at the end of the TOC, all session information on the disc can be acquired, and the session information acquisition time can be greatly reduced. (3) By reproducing the area where the address information of the TOC Blocks behind the TOC is recorded and reproducing the TOC Blocks of the address,
All session information on the disc can be acquired, and the acquisition time of session information can be greatly reduced. (4) Last valid TOC Blo recorded in TOC
The problem that the address of cks is mistaken for TOC Blocks can be solved.

[Brief description of drawings]

FIG. 1 shows the configuration of a DVD + R drive device according to the present invention.

FIG. 2 shows the structure of a DVD + R disc.

FIG. 3 shows a structure of an Inner Drive Area.

FIG. 4 shows a structure of TOC Blocks and TOC Items.

FIG. 5 shows a detailed structure of TOC Blocks.

FIG. 6 shows states before and after adding TOC Blocks.

FIG. 7 shows a state in which the disc is closed from the write-once state.

FIG. 8 shows an operation flowchart of the DVD + R drive device according to the first embodiment of the present invention.

FIG. 9 shows a state in which the additional writing is possible and the state is closed by the process of the first embodiment.

FIG. 10 shows an operation flowchart of the DVD + R drive device according to the second embodiment of the present invention.

FIG. 11 shows a state in which the additional recording is possible and the state is closed by the process of the second embodiment.

FIG. 12 shows an operation flowchart of a DVD + R drive device according to Examples 3 and 4 of the present invention.

FIG. 13 shows a state of being closed by the processing of the third embodiment.

FIG. 14 shows a state of being closed by the processing of the fourth embodiment.

[Explanation of symbols]

1 DVD + R disc 2 motor 3 Rotation control section 4 pickup 5 Actuator control section 6 Signal control section 7 Drive controller 8 buffer memory 9 Laser drive circuit 10 External interface 11 Host computer

Claims (5)

[Claims] 1. A unit for recording data in a data area of a write-once type information recording medium for each recording unit, a unit for recording information on the recording unit in a block unit in a table of contents area of the recording medium, and the data area. A means for recording, as a block unit, information on the new recording unit and all the recording units previously recorded in the table of contents area every time a new recording unit is added to An information recording apparatus, further comprising means for recording information on all recording units in the data area in block units in an unused area of the table of contents area. 2. A means for recording data for each recording unit in a data area of a write-once type information recording medium, a means for recording information about the recording unit in a block unit in a table of contents area of the recording medium, and the data area. A means for recording, as a block unit, information on the new recording unit and all the recording units previously recorded in the table of contents area every time a new recording unit is added to In addition, after recording predetermined data in the unused area of the table of contents area, for the area of the last block unit of the unused area, information about all the recording units in the data area in block units. An information recording apparatus comprising: a recording unit. 3. A means for recording data in a data area of a write-once type information recording medium for each recording unit, a means for recording information on the recording unit in a block unit in a table of contents area of the recording medium, and the data area. A means for recording, as a block unit, information on the new recording unit and all the recording units previously recorded in the table of contents area every time a new recording unit is added to And an information recording device having means for recording predetermined data in an unused area of the table of contents area, wherein the predetermined data is recorded when the recording of the data is disabled. A means for recording address information when recording information on all recording units in the data area in block units in a predetermined position of the unused area is provided. An information recording device characterized by the above. 4. A function of recording data for each recording unit in a data area of a write-once type information recording medium, a function of recording information about the recording unit in a block unit in a table of contents area of the recording medium, and the data area. Each time a new recording unit is added to, a function of recording the information about the new recording unit and all the previously recorded recording units as a block unit in the table of contents area, and when data recording is disabled And a program for causing a computer to realize a function of recording information on all recording units in the data area in block units in an unused area of the table of contents area. 5. A computer-readable recording medium in which the program according to claim 4 is recorded.