KR100744261B1 - Rewritable high density digital Versatile disc - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rewritable, high-density digital multifunction disc capable of quickly determining the zone in which the current optical pickup is located.

The divided zones of the data area are identified in a plurality of wobble data units (WDUs) physically recorded in the data lead-in area, data area, and data lead-out area of the rewritable high-density digital multifunction disc according to the present invention. By recording the zone identification information, the zone in which the current optical pickup is located can be easily determined even if only one wobble data unit (WDU) is decoded from the 17 wobble data units (WDU). Therefore, according to the present invention, it is possible to stabilize the rotational speed of the disc within a short time even in the situation where track jump is performed.

HD DVD-RW, disc information, zone identification information, wobble data unit

Description

Rewritable high density digital versatile disc

1 shows a disc structure for a rewritable high density DVD (HD DVD-RW);

2 is a diagram illustrating the structure of a periodic position wobble address (WAP);

FIG. 3 is a view illustrating a minimum rotation speed in each zone. FIG.

4 is a diagram illustrating a structure of a wobble data unit according to an embodiment of the present invention;

5 and 6 are diagrams showing examples of the order in which zone identification information and disc information DI are recorded according to the present invention; and

7 illustrates a structure of a wobble data unit according to another exemplary embodiment of the present invention.

The present invention can efficiently manage disc information (DI) of a rewritable high-density digital multi-function disc (HD DVD-RW), and quickly determine a zone where an optical pickup is currently located. A rewritable high density digital multifunction disc.

In general, CD and DVD are widely used as optical recording media for recording and storing digital audio and video data. Recently, new high-density optical discs, such as high-density DVDs, that can store high-quality video data and high-quality audio data for a long time. Standardization of (HD DVD: High Definition Digital Versatile Disc) is rapidly progressing.

High-density DVD (HD DVD), which is emerging as the next generation of optical recording media, is a high-density DVD (ROM) for recording, HD DVD-R (write once), and high-density rewritable according to physical structure and recording method. It is classified as HD DVD-RW. The rewritable high-density DVD (HD DVD-RW) is capable of additional recording and overwriting unlike a high-definition high-definition DVD (ROM) or a write-only high-density DVD (HD DVD-R). Have

1 is a diagram showing a disk structure for a rewritable high density DVD (HD DVD-RW).

As shown in FIG. 1, the HD DVD-RW includes a system lead-in area, a data lead-in area, a data area, and a data lead-out area. Lead-Out)

In the system lead-in area and data lead-in area, main disc information (DI) to be permanently stored is repeatedly recorded a predetermined number of times in a wobble form. The optical disc device reads disc information DI repeatedly recorded in the wobble form in the system lead-in area or data lead-in area when HD DVD-RW is inserted and mounted, and records or records data based on the read disc information DI. Perform the playback operation.

However, when the system lead-in area and data lead-in area are damaged by dust, fingerprints, scratches, cracks, or the like, read and confirm the disc information recorded in the system lead-in area and the data lead-in area. Since this becomes impossible, a problem arises that the data recording or reproducing operation cannot be performed on the optical disc. Therefore, there is an urgent need for efficient disk information (DI) management.

Meanwhile, groove tracks and land tracks are formed in the data lead-in area, the data area, and the data lead-out area except the system lead-in area, and each track includes a plurality of physical segments. It is divided into In each physical segment, a physical address is recorded in the form of a wobble, which is called a Wobble Address in Periodic Position (WAP). The WAP is divided into 17 Wobble Data Units (WDUs).

2 is a diagram illustrating the structure of a periodic location wobble address. As shown in FIG. 2, the WAP includes a sync field, an address field, and a unity field.

In the address field, the physical address of the actual disk is recorded. Since the address field is configured to represent a total of 3 bits (bit0 to bit2) of data bits in 13 phase-modulated 13 wobbles, the address field may represent 39 (3 * 13) bits of data in the entire address field. That is, 39 bits of physical address information are allocated to one physical set. This 39-bit physical address information includes segment information, segment address, zone address, address parity, groove track address, and land track address. Track Address).

In addition, in the case of the HD DVD-RW, as shown in FIG. 3, the data area is divided into 19 zones, and the rotational speed of the spindle motor in each zone is defined. That is, the system lead-in area is specified to rotate at a constant linear velocity (CLV) of at least 6.61 m / s. In other areas, that is, the data lead-in area, data area, and data lead-out area It is specified to rotate the disc with a defined ZCLV (Zoned CLV). Therefore, to rotate the HD DVD-RW at the specified speed, it is necessary to know the zone where the optical pickup is currently located.

However, according to the disc structure of the conventional HD DVD-RW as described above, since the zone address is recorded in a specific wobble data unit (WDU) in the address field, at least one WAP length of wobble data, that is, 1428 (17 * total) It is necessary to decode 84 wobble data to determine the zone where the current optical pickup is located. Therefore, it takes a lot of time to determine the zone position, and accordingly a problem that takes a long time to rotate the disk by applying a rotation speed suitable for the zone.

In addition, fingerprints or defects occur in an area where the optical pickup track jumps, and decoding of the wobble data constituting the WAP fails, so that zone information cannot be obtained or incorrect zone information can be obtained. However, in the case of the conventional HD DVD-RW, since a code for error correction is not included in the WAP, a problem arises in that even if an error occurs in the zone information, the error cannot be corrected.

Accordingly, the present invention was created to solve the above problems, and an object of the present invention is to reduce the time required for decoding zone information and to quickly and accurately grasp the zone where the current optical pickup is located even when decoding fails. A rewritable high density digital multifunction disc is provided.

Further, another object of the present invention is to provide a rewritable, high density digital multifunction disc capable of efficiently managing disc information recorded in the system lead-in area and data lead-in area.

In order to solve the above technical problem, the rewritable high density digital multifunction disc according to the present invention is divided into a system lead-in area, a data lead-in area, a data area and a data lead-out area, and includes the data lead-in area, A plurality of wobble data units are physically recorded in the data area and the data lead-out area, and each wobble data unit has zone identification information for identifying a divided zone of the data area. It is recorded in the form.

In addition, disc information is further recorded in the wobble data unit.

The disc information is characterized in that information is already recorded in the system lead-in area and the data lead-in area.

The zone identification information and the disc information are recorded in 68 wobbles formed at the end of each of the sync field, the address field and the unity field constituting the wobble data unit.

The zone identification information and the disc information are included in the unity field constituting the wobble data unit and recorded.

Preferably, the zone identification information is modulated and recorded in the form of one or more consecutive inverse phase wobble or normal phase wobble.

On the other hand, to solve the above technical problem, the rewritable high density digital multifunction disc according to the present invention is divided into a system lead-in area, a data lead-in area, a data area, and a data lead-out area. A plurality of wobble data units are physically recorded in an area, a data area, and a data lead-out area, and each wobble data unit includes disc information required for data recording or reproducing. Disc Information) is recorded in a wobble form.

The disc information is information already recorded in the system lead-in area and the data lead-in area.

The disc information is recorded in the 68 wobbles formed at the end of each of the sync field, the address field and the unity field constituting each wobble data unit.

The disc information is recorded in the unity field constituting the wobble data unit.

Hereinafter, with reference to the accompanying drawings will be described the present invention in more detail. However, in describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted.

First, a rewritable digital multifunction disc (HD DVD-RW) according to the present invention is divided into a system lead-in area, a data lead-in area, a data area, and a data lead-out area as described above with reference to FIG. In the system lead-in area and data lead-in area, disc information (DI) to be permanently stored is repeatedly recorded a predetermined number of times in a wobble form.

In addition, the HD DVD-RW according to the present invention is divided into 19 zones Zone0 to Zone18 as described above with reference to FIG. 3. A plurality of grooves and land tracks are formed in each divided zone, and each track is divided into a plurality of physical segments. Each physical segment is composed of a Wobble Address in Periodic Position (WAP). The WAP is composed of 17 wobble data units (WDUs).

Each of the plurality of wobble data units (WDUs) is recorded in zone identification information or burst cutting area (BCA), system lead-in area, and data lead-in area for identifying divided zones of the data area. The disc information DI is recorded.

4 is a diagram illustrating the structure of a wobble data unit according to an embodiment of the present invention.

As shown in FIG. 4, the periodic position wobble address (WAP) is composed of a sync field, an address field, and a unity field, and one wobble data unit is included in the sync field. (WDU) is allocated, thirteen wobble data units (WDUs) are assigned to the address field, and three wobble data units (WDUs) are assigned to the unity field.

At the end of the sync field, address field, and unity field, a section in which 68 wobbles in common are recorded is allocated. Zone identification information (Zone Index) indicating the number of the zone to which it belongs, and main disc information necessary for the reproducing operation or recording operation for reproducing the data recorded on the HD DVD-RW in the section where 68 wobbles are recorded (DI) ) Can be recorded.

The zone identification information and the disk information DI are modulated and recorded in a wobble form, and are recorded in a binary form of n bits.

As described above, since the current HD DVD-RW is divided into 19 zones, 5 bits are required to represent 19 zone numbers from 0 to 18 in binary form. The number of wobbles for representing the 5 bit data bit depends on the number of wobbles constituting 1 bit. At this time, it is preferable that the number of wobble for constituting 1 bit is one or more in consideration of a detection error. In the case of configuring one bit with four consecutive wobbles as in the address field, 20 wobbles are required to represent 5 bits of data bits. Hereinafter, the case of configuring one bit with four consecutive wobbles will be described as an example.

The 20 wobbles are recorded in the form of an inverse phase wobble (IPW) or a normal wobble (NPW) in four units. At this time, if four consecutive inverse wobbles (IPW) are referred to as "1", and four consecutive normal wobbles (NPW) are referred to as "0", 20 wobbles can represent the form of a 5-bit binary number. .

On the other hand, the disk information DI is recorded in a section other than the section in which the zone identification information is recorded among the sections in which the 68 wobbles are recorded. The disc information DI is also modulated and recorded in a wobble form in the same manner as the zone identification information. The disc information DI is information that has already been repeatedly recorded a predetermined number of times in the BCA area, the system lead-in area and the data lead-in area, and is useful when the discs are damaged and the disc information DI cannot be read. Can be used.

The disc information DI may be divided into information recorded in the BCA area, system lead-in area information, and information recorded in the data lead-in area. Looking at the information recorded in each area as follows. First, the disc information DI recorded in the BCA area includes book type, disc type, extended part version information, and the like. The disc information (DI) recorded in the system lead-in area includes standard type and part version information, disc size information, disc structure, and recording density. Physical Format Information including Data Area Allocation Information, Disc Manufacturing Information, including Disc Manufacturer's Name and Disc Manufacturing Location Manufacturing information), and copyright protection information including copyright protection system type information. The disc information DI recorded in the data lead-in area is composed of a plurality of drive descriptions including a drive manufacturer's name, additional information, and drive condition information. do.

The zone index and the disc information DI may be recorded in the same structure as in FIGS. 5 and 6. That is, as shown in FIG. 5, zone identification information can be recorded in a section in which the first 20 wobbles are recorded, and disk information DI can be recorded in a section in which the remaining 48 wobbles are recorded. Alternatively, as shown in FIG. 6, the disc information DI may be recorded in a section in which the first 48 wobbles are recorded, and the zone identification information may be recorded in a section in which the remaining 20 wobbles are recorded.

On the other hand, in the above description, 68 wobbles having the zone identification information and the disk information DI in common at the end of the synchronization field, the address field, and the unity field constituting the wobble data unit (WDU) are recorded. Although the case of recording in the section has been described, the present invention is not limited thereto.

7 illustrates a structure of a wobble data unit according to another exemplary embodiment of the present invention.

As illustrated in FIG. 7, the zone identification information and the disc information DI may be recorded in the unity field constituting each wobble data unit (WDU). In addition, the identification information (Zone Index) and the disk information (DI) can be recorded in the structure as shown in FIG.

As described above, when the identification information (Zone Index) is recorded not only in the wobble data unit (WDU) constituting the address field, but also in the wobble data unit (WDU) constituting the sync field and the unity field, there are 17 Since only one wobble data unit (WDU) of the wobble data unit (WDU) needs to be decoded, the time required for decoding zone information can be reduced.

Although the present invention has been described in detail with reference to exemplary embodiments above, those skilled in the art to which the present invention pertains can make various modifications to the above-described embodiments without departing from the scope of the present invention. I will understand. Therefore, the scope of the present invention should not be limited to the embodiments described, but should be determined not only by the claims below but also by the equivalents of the claims.

As described above, according to the present invention, the zone identification information is recorded in each of the 17 wobble data units (WDUs) constituting the physical segments of the data lead-in area, data area, and data lead-out area. Decoding only one wobble data unit (WDU) of the 17 wobble data units (WDU) can easily determine the zone position where the current optical pickup is located. Therefore, even in a situation where track jump is performed, the rotational speed of the disc can be stabilized in a short time.

In addition, when the zone identification information is recorded in each of the 17 wobble data units (WDU) as described above, an error occurring in the zone information can be corrected, so that even when a track jump is made to a fingerprint or a defective area, it can be quickly and accurately. The zone location can be determined, thus improving the performance of the system.

Further, according to the present invention, a plurality of physical disk information (DI) recorded in the BCA area, the system lead-in area, and the data lead-in area are physically recorded in the data lead-in area, data area, and data lead-out area. By additional recording in the wobble data unit (WDU), even if the BCA area, the system lead-in area and the data lead-in area are damaged and the disc information cannot be read, the disc information recorded in the wobble data unit can be used. Therefore, the recording or reproducing operation can be normally performed.

Claims (11)

It is divided into a system lead-in area, a data lead-in area, a data area, and a data lead-out area, wherein the data lead-in area, the data area, and the data lead-out area each include a plurality of wobbles composed of a sync field, an address field, and a unity field. In the high-density digital multifunction disc having address information, wherein each field of the wobble address information is physically recorded at least one wobble data unit (Wobble Data Unit), And a zone identification information for identifying a divided zone of the data area in wobble form in each wobble data unit of the wobble address information. The method of claim 1, Disc information (Disc Information) is further recorded in each wobble data unit. The method of claim 2, And the disc information is the same information as the disc information recorded in the system lead-in area and the data lead-in area. The method of claim 2, And the zone identification information and the disc information are recorded in 68 wobbles formed at the end of the wobble data unit. The method of claim 4, wherein And the zone identification information and the disc information are modulated and recorded in the form of one or more consecutive inverse phase wobble or normal phase wobble. The method of claim 2, And the zone identification information and the disc information are recorded only in the wobble data unit of the unity field. The method of claim 6, And the zone identification information and the disc information are modulated and recorded in the form of one or more consecutive inverse phase wobble or normal phase wobble. It is divided into a system lead-in area, a data lead-in area, a data area, and a data lead-out area, wherein the data lead-in area, the data area, and the data lead-out area each include a plurality of wobbles composed of a sync field, an address field, and a unity field. In the high-density digital multifunction disc having address information, wherein each field of the wobble address information is physically recorded at least one wobble data unit (Wobble Data Unit), And a disc information required for data recording or reproducing operation is recorded in a wobble form in each wobble data unit of the wobble address information. The method of claim 8, And the disc information is the same information as the disc information recorded in the system lead-in area and the data lead-in area. The method of claim 8, And the disc information is recorded in 68 wobbles formed at the end of the wobble data unit. The method of claim 8, And the disc information is recorded only in the wobble data unit of the unity field.

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