JP2001332026A - Optical disk recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical disk recording device which enables judging that a disk is subjected to simple deletion and performs processing of the deletion of recorded information, termination of recording, etc., when necessary at the new recording. SOLUTION: When simple deletion processing is started, deletion processing information which shows that a deletion processing operation is terminated or is progressing is recorded on an optical disk, and a program memory area(PMA) and a control region (the first read-in, track descriptor of the first track) are erased. Besides, when the simple deletion processing is started, the maximum recorded address information before the deletion is recorded on the optical disk, the program memory area(PMA) and the control region (the first read-in), track descriptor of the first track) are erased. A maximum recorded address used here is a maximum address among an ending address of a final track showed by the PMA, a final recorded address of the final track and the ending address of a last read-out groove.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc recording and reproducing apparatus for recording and erasing information on an optical disc on which various information can be recorded and erased by dividing a recording area into a program area, a management area and an intermediate recording management area. Related to the device.

[0002]

2. Description of the Related Art Conventionally, CDs (Compact Discs)
A session is known as a recording unit. This session is divided into three areas: lead-in, program area, and lead-out. In the program area, various information actually recorded and reproduced by the user is recorded in recording units called tracks and packets. At the head of the track, a track descriptor block indicating the characteristics of the track is recorded. In addition, the table of contents information (Tab
le Of Contents (hereinafter referred to as TOC)
Is recorded. A recording mode in which a plurality of sessions exist on one optical disc is called a multi-session.

Further, CD-R (write-once compact disc), CD-RW (rewritable compact disc)
Has a PMA (Program Memory Area) that manages intermediate information of track recording separately from the TOC.
Is recorded. Conventionally, re-recording is possible with a CD-RW, and for example,
No. 8823 (optical disk recording apparatus), the recorded contents can be erased. There are two forms of erasing operation of the optical disk, 1) overwriting and recording the signal of the erasing pattern, and 2) erasing the signal on the disk. Hereinafter, for simplicity, both are referred to as "erasing". . There are various types of erasure ranges. The most frequently used erasures are erasure of all information on the disc, full erasure, an intermediate recording management area (PMA), and a management area (first read area). In), there are two types of erasing methods, that is, simple erasing in which only the track descriptor of the first track is erased and the entire track is erased in a pseudo manner.

FIG. 7 shows a configuration diagram of a recording area of a CD-RW, and conceptual diagrams of entire erasure and simple erasure. This figure is an example of a multi-session disc, and the sessions are numbered as a first session, a second session,... The PMA is configured further inside the first session. In the figure, the shaded portion is the area where information is recorded, and the intermittent portion where nothing is written indicates a portion that has been erased or has not been recorded. In FIG. 7D, a portion painted black is a portion newly recorded after erasing. Here, FIG.
(A) shows that the data is recorded up to the third session. As illustrated, a part of the PMA is partially recorded in the program areas of the first session, the second session, and the third session.

FIG. 7B shows the disk shown in FIG. 7A after the entire surface has been erased.
Therefore, the entire surface of the disk is an erased or unrecorded area. FIG. 7 (c) shows the disk shown in FIG. 7 (a) after simple erasure. PMA, lead-in of the first session (1stL
ead-in) and the track descriptor recorded at the beginning of the program area of the first session. FIG. 7D shows the disc after new recording has been performed on the disc shown in FIG. 7C. As shown in the figure, a portion recorded and left before the simple erasure (shaded portion) and a portion newly recorded after the simple erasure (black portion) are mixed.

[0006]

However, in the above prior art, as can be seen by comparing FIGS. 7B and 7C, simple erasing has a smaller area to be erased compared to whole erasing, so that the erasing operation is smaller. Although it has the advantage of being short in time, it has the following problems. That is, although the disk which has been simply erased appears to be completely erased at first glance, as shown in FIG. 2C, the information before the erasure remains on the disk. Once the track or packet is once recorded on the disc, as shown in FIG. 2D, a portion recorded and remaining before the simple erasure and a portion newly recorded after the simple erasure are mixed. As a result, it is not possible to discriminate between them, and it is impossible to determine whether the disk is a disk that has been completely erased before new recording or a disk that has been simply erased. The information before erasing can be reproduced, and erroneous information is reproduced. Therefore, as means for avoiding the problem of reproducing the erroneous information, for example, a method disclosed in Japanese Patent Application Laid-Open No. H11-7726 (optical disk recording apparatus) has been proposed. This means that when a new packet is recorded, the entire track must be erased and the device must store whether or not the disc has been simply erased, or check the area of the track.

However, the amount of disk that can be stored by the apparatus is limited, and in order to completely check whether or not the track has been erased, it is necessary to check the entire area of the track. It takes time. Normally, when recording a new track, the end address is often tentatively the last address of the disc. In such a case, to completely check whether the track has been erased, Everything from the start address of the track to the end address of the disk must be examined.

Accordingly, an object of the present invention is to make it possible to determine that a disk has been simply erased by recording the information on the disk which has been easily erased, and to erase the already recorded information as necessary at the time of subsequent new recording. Another object of the present invention is to provide an optical disk recording apparatus capable of performing processing such as stopping recording.

[0009]

In order to achieve the above object, the present invention divides a recording area into a program area, a management area, and an intermediate recording management area on an optical disk capable of recording and erasing various information. An optical disk recording apparatus for recording and erasing information, comprising: a simple erasure processing means for executing a simple erasure processing for erasing only the management area and the intermediate recording management area; and a simple erasure processing by the simple erasure processing means. In this case, there is provided an erasure processing information recording means for recording on the optical disk erasure processing information indicating that the simple erasure processing is being performed or has already been performed. Further, the present invention is an optical disc recording apparatus for recording and erasing the information by dividing a recording area into a program area, a management area, and an intermediate recording management area on an optical disc capable of recording and erasing various information, A simple erasure processing means for executing a simple erasure processing for erasing only the management area and the intermediate recording management area; and a maximum recorded address of the optical disk before the simple erasure when the simple erasure processing means performs the simple erasure processing. And a maximum recorded address information recording means for recording information on the optical disc.

In the optical disk recording apparatus according to the present invention, the erasure processing information recording means, when executing the simple erasure processing by the simple erasure processing means, displays erasure processing information indicating that the simple erasure processing is being performed or has already been performed. Is recorded on the optical disk. Therefore, at the time of the simple erasure, by recording on the disk the erasure processing information that is being executed or has already been erased, it is possible to instantly judge that the erased disk has been erased by the simple erasure processing. Then, at the time of new recording thereafter, it is possible to perform processing such as erasing of the recorded information and stopping the recording as necessary. In the optical disc recording apparatus of the present invention, the maximum recorded address information recording means stores the maximum recorded address information of the optical disc before the simple erasure on the optical disc when performing the simple erasure process by the simple erasure processing means. Record. Therefore, by recording the maximum recorded address information before erasure on the disk, the new recorded address and the maximum recorded address before erasure are compared when the disk after erasure is used. It is possible to determine whether or not the information before erasure remains, and at the time of new recording thereafter, it is possible to perform processing such as erasing of the already recorded information or stopping the recording as necessary.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an optical disk recording apparatus according to the present invention will be described below. FIG. 1 is a block diagram showing a configuration example of an optical disk drive that implements a disk recording device according to the present invention. This optical disc drive is, for example, a rewritable CD as an information recording medium.
CD for recording / erasing information on CD-RW using -RW
An OP block 3 which is configured as a RW recording device and includes a spindle motor 2 for rotating an optical disk 1, an optical pickup, and the like;
, A servo circuit 6 for controlling their operations, a signal processing circuit 4 for processing reproduction / recording signals, and a buffer memory 5 for temporarily storing information during reproduction / recording. , Host computer 11
External interfaces (ATAPI, SCSI, etc.)
), A controller 8 for controlling the operation of each unit, and a work memory 10 of the controller 8.

At the time of information reproduction, the disk 1 is rotated by the spindle motor 2, moved to the target position by the sled 7, the laser light L is emitted from the OP block 3 with the reproduction power, and the reflected light is used as necessary. The signal is fetched, demodulated by the signal processing circuit 4, accumulated in the buffer memory 5 as necessary, and transferred to the host computer 11 through the external interface circuit 9. At the time of information recording, information is transferred from the host computer 11 through the external interface circuit 9, the disk 1 is rotated by the spindle motor 2 stored in the buffer memory 5 as necessary, the thread is moved to the target position by the thread 7, The information stored in the memory 5 is modulated by the signal processing circuit 4, and the obtained signal is recorded on the disk 1 by emitting the laser beam L with the recording power by the OP block 3. Further, at the time of information erasing, a signal of a predetermined erasing pattern is generated by the signal processing circuit 4 and is recorded on the disk 1 as in the case of information recording, or the OP block 3 emits a laser beam L with erasing power. Thus, the signal on the disk 1 is erased.

Next, a description will be given of a function which is a feature of the present invention and is executed in the above-described optical disk drive with reference to a flowchart. FIG. 2 is a flowchart showing a first operation example of the simple erasing process in the optical disk drive of the present embodiment, and shows a process corresponding to claim 1 of the present invention. In the simple erasing process of this example, when the simple erasing process is first started (step SP1), erasing process information indicating that the erasing process is being performed or has been completed is recorded on the optical disc (step SP2), and the intermediate recording management area (step SP2). PMA) and erase the management area (first lead-in, track descriptor of the first track) (step SP3). In this example, the order of step SP2 and step SP3 may be any order. According to the present example, at the time of simple erasure, the erasure processing information that is being executed or has already been erased is recorded on the disk, so that the erased disk is erased by the simple erasure processing. Can be instantly determined. Then, if it can be determined that the disc has been simply erased, it is possible to perform processing such as erasing of the recorded information or stopping the recording as necessary at the time of new recording thereafter.

FIG. 3 is a flowchart showing a second operation example of the simple erasure process in the optical disk drive of the present embodiment, and shows a process corresponding to claims 2 and 3 of the present invention. In the simple erasure process of this example, when the simple erasure process is started (step SP11), erasure process information indicating that the erasure process is being performed or has been completed is recorded in the intermediate recording management area (step SP12). The intermediate recording management area (PMA) and the management area (first lead-in, track descriptor of the first track) are erased (step SP13). At this time, the erasure processing information recorded in the intermediate recording management area, which indicates that the erasure processing is being performed or has been completed, is not erased or is re-recorded immediately after the erasure. According to this example,
At the time of the simple erasure, by recording on the disk the erasure processing information during or after the erasure is performed, it is possible to instantaneously determine that the erased disk has been erased by the simple erasure processing. Then, if it can be determined that the disc has been simply erased, it is possible to perform processing such as erasing of the recorded information or stopping the recording as necessary at the time of new recording thereafter.

FIG. 4 is a flowchart showing a third operation example of the simple erasing process in the optical disk drive of the present embodiment, and shows a process corresponding to claim 4 of the present invention.
In the simple erasing process of this example, when the simple erasing process starts (step SP21), the maximum recorded address information before erasing is recorded on the optical disk (step SP22), the intermediate recording management area (PMA), and the management area (first The lead-in,
Erase the track descriptor of the first track (step SP23). The maximum recorded address used here is the maximum address among 1) the end address of the last track indicated by the PMA 2) the last recorded address of the last track 3) the end address of the last lead-out. Either step SP22 or step SP23 may be performed first. According to this example, by recording the maximum recorded address information before erasure on the disk, when using the disk after erasure, the new recorded address is compared with the maximum recorded address before erasure. This makes it possible to determine whether or not the information before erasure remains on the disk.

FIG. 5 is a flowchart showing a fourth operation example of the simple erasing process in the optical disk drive of the present embodiment, and shows a process corresponding to claims 5 and 6 of the present invention. In the simple erasing process of this example, when the simple erasing process starts (step SP31), the maximum recorded address information before erasing is recorded in the intermediate recording management area (step SP33), and the intermediate recording management area (PMA) is managed. The area (first lead-in, track descriptor of the first track) is erased (step SP33). At this time, the maximum recorded address information before erasure recorded in the intermediate recording management area is not erased or re-recorded immediately after erasure. The maximum recorded address information used here is the fourth recorded address information.
The operation is the same as that described in the operation example. According to this example, by recording the maximum recorded address information before erasure on the disk, when using the disk after erasure, the new recorded address is compared with the maximum recorded address before erasure. This makes it possible to determine whether or not the information before erasure remains on the disc, and at the time of a new recording thereafter, it is possible to perform processing such as erasing the already recorded information and stopping the recording as necessary.

FIG. 6 is a flowchart showing a fifth operation example in the optical disk drive of this embodiment, and shows a process corresponding to claim 7 of the present invention. The operation of this example is
This is an operation after the simple erasure processing. When this processing is started (step SP41), the optical disk on which the maximum recording address before the erasure is recorded is simply erased by the erasure processing shown in FIG. 4 or FIG. After insertion (step SP42), normal recording processing is performed according to a request from the host computer 11 (step SP43). And
After the recording processing, the newly recorded recording address is compared with the maximum recording address before erasure recorded on the optical disk (step SP44). If the new recording address is larger, the maximum recording address information before erasure is compared. Is erased from the disk (step SP45). If the new recording address is smaller, the maximum recording address information is not erased. According to this example, when the new recording address after erasure exceeds the maximum recorded address before erasure, the maximum recorded address information before erasure is erased from the disk, and thereafter the information before erasure is erased. It can be seen that the above information is not recorded, and the disc can be used in the same manner as the disc used after being completely erased.

In the above description, a re-recordable CD-RW is used as an information recording medium, and information is recorded / recorded on the CD-RW.
The example in which the CD-RW recording device for erasing is used has been described. However, the present invention is not limited to this, and is applicable to all rewritable and erasable media.

[0019]

As described above, in the optical disk recording apparatus of the present invention, when the simple erasure processing is performed by the simple erasure processing means, the erasure processing information indicating that the simple erasure processing is being performed or has already been performed. Is recorded on an optical disk. For this reason, at the time of the simple erasure, by recording the erasure processing information during or after the erasure is performed on the disk, it is immediately determined that the erased disk has been erased by the simple erasure processing. Can,
At the time of the subsequent new recording, there is an effect that processing such as erasing of recorded information and stopping recording can be performed as necessary.

In the optical disk recording apparatus of the present invention,
When executing the simple deletion processing by the simple deletion processing means,
The maximum recorded address information of the optical disk before the simple erasure is recorded on the optical disk. For this reason,
By recording the maximum recorded address information before erasure on the disk, the new recorded address is compared with the maximum recorded address before erasure when the disk after erasure is used. It is possible to determine whether or not the information remains, and to perform a process such as erasing the already-recorded information or stopping the recording as necessary at the time of new recording thereafter.

In the optical disk recording apparatus of the present invention,
When the recording address becomes larger than the maximum recorded address information of the optical disk before the erasure by the new recording process after the simple erasure, the maximum recording address information before the erasure recorded on the optical disk is erased from the optical disk. did. For this reason, when the new recording address after erasure exceeds the maximum recorded address before erasure, the maximum recorded address information before erasure is erased from the disk, and thereafter the information before erasure is recorded. I understand that there is no
There is an effect that the disk can be used in the same manner as a disk used after being completely erased.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration example of an optical disk drive implementing a disk recording device according to the present invention.

FIG. 2 is a flowchart showing a first operation example in the disk recording device shown in FIG. 1;

FIG. 3 is a flowchart showing a second operation example in the disk recording device shown in FIG. 1;

FIG. 4 is a flowchart showing a third operation example in the disk recording device shown in FIG. 1;

FIG. 5 is a flowchart showing a fourth operation example in the disk recording device shown in FIG. 1;

FIG. 6 is a flowchart showing a fifth operation example in the disk recording device shown in FIG. 1;

FIG. 7 shows the configuration of a recording area of a CD-RW, and erasing the entire surface;
FIG. 4 is an explanatory diagram illustrating the concept of simple erasure.

[Explanation of symbols]

1 ... optical disk, 2 ... spindle motor, 3 ... O
P block, 4 ... signal processing circuit, 5 ... buffer memory, 6 ... servo circuit, 7 ... thread, 8 ... controller, 9 ... external interface circuit, 10 ... work memory, 11 ... host computer .

Claims (7)

[Claims] 1. An optical disc recording apparatus for recording and erasing information on an optical disc capable of recording and erasing various information by dividing a recording area into a program area, a management area, and an intermediate recording management area, A simple erasure processing unit for executing a simple erasure process for erasing only the management area and the intermediate recording management area; and when executing the simple erasure process by the simple erasure processing unit, whether the simple erasure process is being performed or has already been performed. And an erasure processing information recording means for recording erasure processing information indicating that the information is present on the optical disk. 2. The optical disk recording apparatus according to claim 1, wherein an area on the optical disk in which the erasure processing information is recorded is an intermediate recording management area. 3. The optical disc recording apparatus according to claim 2, wherein the erasure processing information is recorded in an intermediate recording management area before the simple erasure, and the erasure processing information is not erased in the simple erasure processing. 4. An optical disc recording apparatus for recording and erasing information on an optical disc capable of recording and erasing various information by dividing a recording area into a program area, a management area, and an intermediate recording management area, A simple erasure processing means for performing a simple erasure processing for erasing only the management area and the intermediate recording management area; and a maximum recorded address of the optical disk before the simple erasure when the simple erasure processing means performs the simple erasure processing. An optical disc recording apparatus, comprising: a maximum recorded address information recording means for recording information on the optical disc. 5. The optical disc recording apparatus according to claim 4, wherein the area on the optical disc in which the maximum recorded address information is recorded is an intermediate recording management area. 6. The method according to claim 5, wherein the maximum recorded address information is recorded in an intermediate recording management area before the simple erasure, and the address information is not erased in the simple erasure processing.
An optical disc recording apparatus according to claim 1. 7. A new recording process after the simple erasure,
5. The optical disc according to claim 4, wherein when the recording address becomes larger than the maximum recorded address information of the optical disc before erasure, the maximum recording address information before erasure recorded on the optical disc is erased from the optical disc. Recording device.