JP4037137B2 - DVD + R device, program and recording medium - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a DVD + R system, such as a DVD + R drive for recording data on a write-once information recording medium.
[0002]
[Prior art]
Conventionally, there is a DVD + R disc as an information recording medium capable of recording / reproducing data. This DVD + R disc is a write once disc capable of recording data only once. As a data recording method, a multi-session recording method in which one disc is divided into a maximum of 191 sessions is employed. Furthermore, each session is divided into regions called up to 16 fragments. At the head of each session is Lead-in (referred to as Intro for the second and subsequent sessions) in which fragment information in the session is recorded. In addition, there is an area called TOC (Table of Contents Zone) before Lead-in of the first session, and session information is managed by TOC Blocks in the area.
[0003]
The TOC Block is composed of 16 sectors (1 ECC block), and information on each session on the disc is recorded as a TOC Item. The drive device can know all the session information on the disc by reproducing the TOC Blocks. Each time a session is added, TOC Blocks are added by adding the previous TOC Item and the TOC Item in which information of the newly added session is recorded. The drive device can obtain all the session information on the disc by reproducing the last TOC Blocks. When the disc is not closed (additional writing is impossible) and the session can be added, the area next to the last TOC Blocks is unwritten and there is no RF signal (Radio Frequency). Therefore, when the disc is not closed, it can be seen that the TOC Blocks immediately before the TOC where there is no RF signal is the latest information.
[0004]
However, when the disc is closed so that data cannot be added, the unused area of the TOC is filled with predetermined data (for example, all “0” is written), so that the last TOC Blocks are searched. There is no choice but to play in order from the beginning. Therefore, it takes time if there are many sessions on the disk.
[0005]
[Problems to be solved by the invention]
For example, in a CD-R disc which is the same Write Once as a DVD + R disc, there is an area called PMA as an area for recording all the track information on the disc, which is recorded in multi-session / multi-track. Each time a track is added, new track information is added to the PMA (see Japanese Patent Laid-Open No. 5-265833).
[0006]
However, in a CD-R disc, the unused area of the PMA is not filled with predetermined data when the disk is closed. Therefore, the area next to the information written at the end of the PMA is an unwritten portion, and the search is performed. It can be done relatively quickly. Further, since the maximum number of tracks on the CD-R disc is 99, even if the PMA is read from the beginning, it does not take much time.
[0007]
On the other hand, since the maximum number of sessions of a DVD + R disc is 191, it takes time to acquire session information when reading from the beginning of the TOC as described above.
[0008]
An object of the present invention is to provide a DVD + R device , a program, and a recording medium that shorten the acquisition time of session information.
[0009]
[Means for Solving the Problems]
In the present invention, a means for recording DVD + R data for each recording unit (session) to the data area of the disc, and means for recording information on the recording unit block by block in the TOC area of the DVD + R disc (TOC zone), Each time a new recording unit is added to the data area, means for recording information on the new recording unit and all previously recorded recording units in the table of contents area as block units, and data recording is impossible And a means for recording information on all recording units in the data area in units of blocks in the unused area of the table of contents area.
[0010]
In the present invention, in a DVD + R drive device for recording / reproducing data on a DVD + R disc, when the disc is closed (additional writing is impossible), means for filling an unused area of the TOC with TOC Blocks in which the last session information is recorded. I have.
[0011]
In the present invention, in a DVD + R drive device for recording / reproducing data on a DVD + R disc, when the disc is closed, the unused area of the TOC is filled with predetermined data, and the last one ECC block is filled with the last TOC Blocks. Means.
[0012]
In the present invention, in a DVD + R drive device for recording / reproducing data on a DVD + R disc, when the disc is closed, the last valid TOC Blocks are recorded in each sector or ECC block in the unused area of the TOC. Means for recording the current address are provided.
[0013]
In the present invention, when the disc is closed in the DVD + R drive device, means for recording the address at which the last valid TOC Blocks is recorded in a predetermined location that is not an unused sector or the top position in the ECC block. I have.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a configuration of a DVD + R drive apparatus according to the present invention. The DVD + R drive device includes a motor 2 that rotates the DVD + R disk 1 at an arbitrary rotation speed, and a rotation control unit 3 that controls the motor 2. Furthermore, the pickup 4 for irradiating the DVD + R disk 1 with the optical laser, the laser drive circuit 9 for driving the optical laser of the pickup 4, the actuator controller 5 for controlling the pickup 4 to move in the radial direction, and the pickup 4 The signal control part 6 which controls the signal from is provided.
[0015]
Further, it comprises a drive controller 7 which controls the entire drive device, such as an external interface 10 for exchanging signals with the host computer 11 and a buffer memory 8 which is a temporary storage location for data and the like.
[0016]
The DVD + R drive device can record / reproduce data to / from a DVD + R disc as shown in FIG. FIG. 2 shows the structure of a DVD + R disc. From the inner periphery, the inner drive area 12 that is the calibration area of the drive, the fragment information in the session, etc. are recorded, and the lead-in zone 13 that is the area indicating the beginning of the session, which consists of 1 to a maximum of 16 fragments, Data Zone 14 which is an area for recording user data, Closure 15 which is an area indicating the end of the session (referred to as Closure before the last session), Intro 16 which is an area indicating the start of the session (the second and subsequent sessions are referred to as Intro) And Lead-out Zone 17 which is an area indicating the end of the session, and Outer Drive Area 18 which is a calibration area of the drive. The session 19 is one unit composed of Lead-in (Intro after the second session), Data Zone, and Lead-out (Close before the last session), and a maximum of 191 can be recorded per disc.
[0017]
User data is recorded in Data Zone 14 in units called 1 to a maximum of 16 fragments, and information on fragments in session 19 is recorded in Lead-in Zone 13 and Intro 16. Data recording / reproduction on a DVD is performed in an ECC block. One ECC block has 16 sectors.
[0018]
FIG. 3 shows the configuration of Inner Drive Area 12. Inner Drive Area 12 includes Initial Zone, Inner Disc Test Zone, Inner Disc Count Zone, Inner Disc Administration Zone, and TOC (Table of Contents) Zone. The Inner Disc Test Zone and Inner Disc Count Zone are calibration areas. When the DVD + R drive device records on the DVD + R disc 1 for the first time, laser power calibration (OPC) is performed in this area, and the DVD + R disc 1 is read. Set the appropriate recording power.
[0019]
FIG. 4 shows the structure of TOC Blocks and TOC Items. In the TOC, TOC Blocks are recorded, and session information is recorded in a TOC Item included in the TOC Blocks. Each time a session is added, TOC Blocks to which a TOC Item corresponding to the session is added is added. In the TOC Blocks in which the last session is recorded, information on all the sessions 19 included in the DVD + R disc 1 is recorded.
[0020]
FIG. 5 shows a detailed configuration of TOC Blocks. TOC Blocks recorded in the TOC are recorded for each ECC block (16 sectors). Of these 16 sectors, data is actually recorded only in the first sector, and the other 15 sectors are reserved (all “0” data). One sector is 2048 bytes.
[0021]
This 1 ECC block is one TOC Block, and each time a TOC Item is added, the TOC Blocks are added to the TOC area. FIG. 6 shows a state before and after the addition of TOC Blocks. The maximum number of ECC blocks secured in the TOC area is determined in advance.
[0022]
As described in the prior art, in the normal sequence, when the disk is closed, the remaining unused area of the TOC is filled with dummy data (all 0). FIG. 7 shows a state in which the disc is closed from a state where additional recording is possible. In the closed state as shown in FIG. 7, in order to search for the last TOC Blocks, it must be read in order from the beginning, which takes time.
[0023]
Example 1
FIG. 8 shows an operation flowchart of the DVD + R drive apparatus according to Embodiment 1 of the present invention. When closing the session, the latest TOC Blocks are added (step A1). If the disc is set to allow additional recording so that data can be recorded thereafter (No in step A2), the processing is terminated without performing this processing.
[0024]
If the disc is set so that no additional recording is possible 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 A3). If there is no unused area (No in step A3), the process is terminated as it is. If there is an unused area (Yes in Step A3), the latest (last) TOC Blocks are recorded (Step A4). If there is no unused area (No in step A3), this process is terminated. FIG. 9 shows a state in which it is closed by the process of the first embodiment from a state in which additional writing is possible. By the processing of the first embodiment, a plurality of last (latest) TOC Blocks are recorded in the unused area of the TOC.
[0025]
(Example 2)
FIG. 10 shows an operation flowchart of the DVD + R drive apparatus according to the second embodiment of the present invention. When closing the session, the latest TOC Blocks are added (step B1). If the disc is set to allow additional recording so that data can be recorded thereafter (No in step B2), the processing is terminated without performing this processing.
[0026]
If the disc is set so that additional recording is impossible 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 B3). If it is determined that there is an unused area in the TOC Zone (Yes in Step B3), it is determined whether or not the unused area is the last ECC block (maximum number of ECC blocks) in the TOC Zone area. However, if it is not the last ECC block (No in step B4), recording is performed with predetermined data (all 0) (step B5). If it is the last ECC block in the TOC Zone area (Yes in Step B4), the latest (last) TOC Blocks are recorded (Step B6), and this process is terminated. FIG. 11 shows a state in which it is closed by the process of the second embodiment from a state in which additional writing is possible. By the processing of the second embodiment, the unused area of the TOC is filled with dummy data, and the last one ECC block is filled with the last (latest) TOC Blocks.
[0027]
(Example 3)
FIG. 12 shows an operation flowchart of the DVD + R drive apparatus according to Embodiment 3 of the present invention. When closing the session, the latest TOC Blocks are added (step C1). If the disc is set to allow additional recording so that data can be recorded thereafter (No in step C2), the processing is terminated without performing this processing.
[0028]
If the disc is set so that no additional recording is 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 C3). When it is determined that there is an unused area in the TOC Zone (Yes in Step C3), the address of the last TOC Blocks is recorded in the unused area (Step C4). When there is no unused area in the TOC Zone area, this process is terminated. FIG. 13 shows a closed state by the processing of the third embodiment, and the address of the last TOC Blocks is recorded in each sector (16 sectors) of dummy data that fills the unused area of the TOC when the disk is closed. Note that an address may be recorded only in the head sector of one ECC block.
[0029]
Example 4
In the above-described third embodiment, the address information is recorded at the location where the content descriptor is recorded. Actually, since the data recorded in the Content Descriptor is determined, the address information will not be the same, but other data is usually recorded at the location where the Content Descriptor or dummy data is recorded. Therefore, there is a possibility of making a mistake. In such a case, incorrect session information is acquired.
[0030]
Therefore, in the fourth embodiment, when the address of the last TOC Blocks is recorded, the address is recorded at an unused sector or a location that is not the head position in the ECC block. The operation flowchart of the DVD + R drive device according to the fourth embodiment is the same as that of the third embodiment (FIG. 12). FIG. 14 shows a closed state by the processing of the fourth embodiment, and the address of the last TOC Blocks is recorded from the 12th byte, for example, which is not the head position.
[0031]
Needless to say, the present invention can be realized by either the above-described processing executed by the drive controller (hardware) or the processing executed by the program (software) in the drive controller.
[0032]
【The invention's effect】
As described above, according to the present invention, the following effects can be obtained.
(1) By reproducing the TOC Blocks 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 one ECC block at the end of the TOC, all session information on the disk can be acquired, and the acquisition time of the session information can be greatly shortened.
(3) All the session information on the disc can be acquired by reproducing the area where the TOC Blocks address information is recorded at the back of the TOC and reproducing the TOC Blocks at that address. Acquisition time can be greatly reduced.
(4) The problem that the address of the last valid TOC Blocks recorded in the TOC is mistaken for the TOC Blocks can be solved.
[Brief description of the drawings]
FIG. 1 shows a configuration of a DVD + R drive device of the present invention.
FIG. 2 shows a configuration of a DVD + R disc.
FIG. 3 shows the structure of Inner Drive Area.
FIG. 4 shows the configuration of TOC Blocks and TOC Items.
FIG. 5 shows a detailed configuration of TOC Blocks.
FIG. 6 shows a state before and after the addition of TOC Blocks.
FIG. 7 shows a state in which the disc is closed from a state where additional recording is possible.
FIG. 8 shows an operational flowchart of the DVD + R drive apparatus according to Embodiment 1 of the present invention.
FIG. 9 shows a state in which it is closed by a process according to the first embodiment from a state in which additional writing is possible.
FIG. 10 shows an operation flowchart of a DVD + R drive apparatus according to Embodiment 2 of the present invention.
FIG. 11 shows a state that is closed by a process according to the second embodiment from a state in which additional writing is possible.
FIG. 12 shows an operation flowchart of a DVD + R drive apparatus according to Embodiments 3 and 4 of the present invention.
FIG. 13 shows a closed state by the processing of the third embodiment.
FIG. 14 shows a closed state by the processing of the fourth embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 DVD + R disk 2 Motor 3 Rotation control part 4 Pickup 5 Actuator control part 6 Signal control part 7 Drive controller 8 Buffer memory 9 Laser drive circuit 10 External interface 11 Host computer

Claims (5)

Means for recording data in the data area of the DVD + R disc for each recording unit; means for recording information relating to the recording unit in the table of contents area of the DVD + R disk ; and a new recording unit is added to the data area. Each time the table of contents is recorded in the table of contents area as a unit of information about the new recording unit and all the previously recorded recording units, and when the data recording is impossible, the table of contents area is not used. A DVD + R device comprising means for recording information relating to all recording units in the data area in units of blocks. Means for recording data in the data area of the DVD + R disc for each recording unit; means for recording information relating to the recording unit in the table of contents area of the DVD + R disk ; and a new recording unit is added to the data area. Each time the table of contents is recorded in the table of contents area as a unit of information about the new recording unit and all the previously recorded recording units, and when the data recording is impossible, the table of contents area is not used. Means for recording information on all recording units in the data area in block units for the last block unit area of the unused area after recording predetermined data in the area; DVD + R device characterized by this. Means for recording data in the data area of the DVD + R disc for each recording unit; means for recording information relating to the recording unit in the table of contents area of the DVD + R disk ; and a new recording unit is added to the data area. Each time the table of contents is recorded in the table of contents area as a unit of information about the new recording unit and all the previously recorded recording units, and when the data recording is impossible, the table of contents area is not used. A DVD + R device comprising means for recording predetermined data in an area, and when the data cannot be recorded, the predetermined data is recorded at a predetermined position in the unused area. And means for recording address information when recording information on all recording units in the data area in the table of contents area in block units. DVD + R and wherein the door. A function for recording data in the data area of the DVD + R disc for each recording unit, a function for recording information relating to the recording unit in the table of contents area of the DVD + R disc in block units, and a new recording unit in the data area Each time, the new recording unit and a function for recording information about all the previously recorded recording units as a block unit in the table of contents area, and when the data recording is impossible, the table of contents area is not used. A program for causing a computer to realize a function of recording information on all recording units in the data area in block units with respect to the area.   A computer-readable recording medium on which the program according to claim 4 is recorded.

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