KR20080062288A - Recording medium, recording playback apparatus and methed thereof - Google Patents

Abstract

A recording medium, and a record/playback part apparatus and method are provided to record management information of an area assigned in a pre-write area so as to secure recording reliability and obtain structure information of the recording medium easily. A recording medium is loaded(S10). A record/playback part device assigns a first management area, and a user data area(S11). The management information on the area assigned to a TDMA(Temporary Disk Management Area) is recorded(S12). When a recording start command is transmitted from a drive or a host(S13), the record/playback part device records a pre-write area prior to recording. The management information of the area assigned in the pre-write area is recorded(S14). When the management information is recorded, a user data is recorded according to the command of the drive or the host(S15).

Description

Recording medium and recording and playback method and apparatus therefor

1 is a cross-sectional view showing one embodiment of a recording medium structure according to the present invention.

2 illustrates an embodiment of a temporary disk definition structure according to the present invention.

3A and 3B show a part of the recording medium according to the first embodiment of the present invention.

4 is a sectional view showing the structure of a recording medium according to the second embodiment of the present invention.

5 shows a part of the recording medium according to the third embodiment of the present invention.

FIG. 6 illustrates an embodiment of a temporary disk definition structure according to a third embodiment of the present invention.

7 is a flowchart showing the flow of a recording method according to an embodiment of the present invention.

8A and 8B show a part of a recording medium according to another embodiment of the present invention.

Fig. 9 shows an embodiment of the recording and reproducing apparatus according to the present invention.

* Explanation of symbols for main parts of the drawings

20: recording and playback section 11: pickup section

12: second control unit 13: signal processing unit

14: servo unit 15: memory

16: first control unit 17: AV decoder

18: AV encoder

The present invention relates to a recording medium, a recording and reproducing method thereof, and an apparatus thereof, and more particularly, to a method and an apparatus for efficiently recording and reproducing management information on a recording medium.

As a recording medium, a recording medium capable of recording a large amount of data is widely used. Recently, new high-density recording media (for example, Blu-ray Discs (BDs)) capable of recording and storing high-quality video data and high-quality audio data for a long time have been developed.

Blu-ray recording media (BD), a next-generation recording media technology, is a next-generation optical recording solution that can record data that significantly exceeds existing DVDs. Recently, the technical specifications of the world standard have been established along with other digital devices.

On the other hand, in the recording and reproducing method using a next generation high density recording medium such as a Blu-ray recording medium (BD), a method of efficiently recording, managing and recording and reproducing management information has been proposed, which is a problem.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a recording medium in which management information is efficiently recorded.

It is also an object of the present invention to provide a method for recording management information on such a recording medium, a recording reproducing method, and an apparatus thereof.

In order to achieve the above object, the recording medium of the present invention includes a first management area including information about a user data area and a structure of the recording medium, and information on the structure of the recording medium which is repeatedly recorded for each recording unit. It is characterized by including 2 management areas. Here, the information about the structure of the recording medium includes information about the position or the size of the first management area allocated to the recording medium, and can be recorded at the start time of recording the user data of the recording medium.

The recording method of the present invention includes the steps of recording management information including information of the first management area in a first management area of a recording medium and second management of the management information recorded in the first management area when recording user data. And repeatedly recording to the area. Here, the management information may include information regarding the position and / or size of the first management area allocated to the recording medium.

The recording / reproducing method of the present invention reads management information of the recording medium provided in the first management area of the recording medium, and if information on the structure of the first management area cannot be read, second management of the recording medium. The management information of the second management area repeatedly recorded for each recording unit in the area may be read, and data may be recorded on the recording medium or reproduced using the read management information.

The recording / reproducing apparatus of the present invention is a recording / reproducing apparatus for recording management information in a recording medium, wherein when user data recording is started, the management information recorded in the first management area of the recording medium is recorded in the second management area of the recording medium. And a recording and reproducing section for repeating recording.

Hereinafter, specific embodiments of a recording medium, a recording reproducing method, and an apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

In addition, the term used in the present invention was selected as a general term that is widely used as possible at present, but in certain cases there is a term arbitrarily selected by the applicant, in which case the meaning is described in detail in the description of the invention, It is to be understood that the present invention is to be understood as the meaning of terms rather than names.

1 shows an embodiment of a recording medium structure according to the present invention. The term " recording medium " in the present invention means any medium in which data is recorded or can be recorded. For example, the term " recording medium " is meant to encompass all media regardless of a recording method such as a recording medium and a magnetic tape. Hereinafter, the present invention will be described using a disc as a recording medium, for example, a "Blue-ray Disk" (hereinafter referred to as "BD") as an example for convenience of description, but the technical concept of the present invention is another recording. The same applies to the medium. Incidentally, for convenience of explanation, the recording medium will be described using a Blu-ray recording medium (BD-R) that can be recorded once as an example. However, the present invention is not limited thereto, and it is obvious that the present invention can be applied to other recording media.

The recording medium BD-R to which the present invention is applicable includes a lead-in area, a data area, and an outer periphery of a disc as shown in FIG. 1. And a lead-out area of a zone. The data area may include a user data area for recording user data and a spare area for managing recording medium defects. Here, the spare area includes an inner spare area (hereinafter referred to as 'ISA') located at the inner circumference of the data area and an outer spare area (hereinafter referred to as 'OSA') located at the outer circumference of the data area. The spare area may not be allocated as necessary.

The lead-in area, the lead-out area, and the spare area are provided with a management area in which management information of a recording medium is recorded. For example, the "management area" may include a temporary disc management area (hereinafter referred to as "TDMA") and a disc management area (DMA) as shown in FIG. have.

In order to update information on defects occurring during the recording / reproducing process or information for management in the course of use, the recording medium may have a TDMA0 area in the lead-in area. The TDMA0 may be allocated to a fixed size in 2048 recording units (hereinafter, referred to as a cluster in the present invention). In the temporary recording medium management area TDMA, as shown in FIG. 1, TDMA1 and TDMA2 may be allocated to the spare area as necessary. In this case, since the TDMA allocated to the spare area is not a fixed size, the TDMA may be allocated by defining a size at the time of formatting. A recording medium management area (DMA) can be provided on the inner and outer circumferences of the recording medium. For example, as shown in FIG. 1, DMA1 and DMA2 may be allocated to the lead-in area, and DMA3 and DMA4 may be allocated to the lead-out area. In the recording and reproducing process, management information is temporarily stored in the TDMA area. If data can no longer be recorded or there is a termination command from the host or system, the data recorded in the TDMA is transferred to DMA and recorded.

"Management information" recorded in TDMA includes one or more Temporary Disk Definition Structures (hereinafter referred to as "TDDS") and one or more Temporary Defect Lists (hereinafter referred to as "TDFLs"). And the like. In this invention, the said TDDS is demonstrated centering on the part which concerns on this invention.

Figure 2 illustrates the configuration of the TDDS of the present invention for one embodiment. As shown, the TDDS includes information regarding the structure of the recording medium. For example, information about a first physical sector number (hereinafter, referred to as 'first PSN') of a drive area is included. Information on each position is also included, including information on the first PSN of the defect list.

In addition, a first logical sector number (hereinafter referred to as 'first LSN'), which is a position at which recording of the user data area starts, and a last logical sector number (hereinafter, referred to as 'last LSN'), which is the last recorded position. Information).

Further, information on the structure of the recording medium including information on the sizes of the inner and outer spare areas and information on the size of the TDMA allocated to the inner and outer spare areas is provided.

3A and 3B are enlarged views of only the lead-in area of the recording medium in the first embodiment of the present invention. As shown, the lead-in area of the recording medium has a first management area (for example, areas such as TDMA0, DMA1, DMA2, etc.) as described in FIG. At this time, a TDDS is provided in the first management area (only before TDMA0 before recording). Further, a second management area (area indicated by 'A' in the drawing) is provided adjacent to TDMA0. Management information such as the TDDS may be repeatedly recorded in the second management area. For example, as shown in FIG. 3A, the TDDS may be recorded for each cluster of the second management area to which 32 clusters are allocated. Alternatively, as shown in FIG. 3B, some clusters may record TDDS and others may record 00h. Alternatively, the TDDS information may be recorded only in one cluster, for example, the first cluster. The TDDS repeatedly recorded here does not require updating, and any one of the TDDSs recorded in the first management area may be used. This improves the reliability of the management information and can efficiently record the management information.

4 shows a case where two recording layers are provided on a recording medium according to the second embodiment of the present invention. For reference, the present invention will be described based on a single layer having one recording layer or a double layer having two recording layers, but the present invention is also applicable to a recording medium having a plurality of recording layers. Reveal. As shown, the double-layer recording medium may have a temporary recording medium management area (TDMA) of TDMA0 and TDMA1 in the lead-in area of each recording layer, respectively. Here, the TDMA0 and the TDMA1 may be allocated in 2048 recording units. 1, TDMA2, TDMA3, TDMA4, and TDMA5 may be further allocated to the spare area as necessary, as shown in FIG. In this case, since the TDMA allocated to the spare area is not a fixed size, the TDMA may be allocated by defining a size at the time of formatting. A recording medium management area may be provided on the inner and outer circumferences of the recording medium. For example, as shown in FIG. 5, DMA1 and DMA2 may be allocated to the lead-in area, and DMA3 and DMA4 may be allocated to the lead-out area. Each of the management areas includes "management information", and the "management information" includes the TDDS as described above.

The recording medium has a second management area A in each layer. Here, the second management area has information about the structure of the recording medium. For example, it may be provided as an area for repeatedly recording the information about the TDDS for each recording unit. This is as described with reference to FIG. 3.

5 and 6 show a lead-in area in the recording medium according to the third embodiment of the present invention. The recording medium of the present invention repeatedly records the TDDS information in the pre-write area of the Info1 area. Here, the " pre-write area " is composed of 32 physical clusters, and is an area in which data is recorded by the first drive to write to each layer. For example, the drive can record TDDS information or 00h including structure information of the recording medium at the time of recording, in the pre-write area, when recording the user data on the recording medium. At this time, all or part of each cluster may be provided with TDDS information so that TDDS can be repeatedly recorded.

The drive updates a flag of the TDDS when data is written to the pre-write area. Referring to the example of Figure 6 as follows. The TDDS may include pre-write area flags. The pre-write area flag is composed of 1 byte, that is, 8 bits, to indicate whether data is recorded in the pre-write area. That is, when four or less recording layers are provided, one to four bits indicate whether data has been recorded in the pre-write area of each recording layer from one layer to four layers, respectively. For example, it may be recorded as '1' if data is recorded and '0' in other cases. In addition, the remaining four bits indicate whether TDDS information is recorded in the pre-write area of each layer. That is, 5 to 8 bits indicate whether or not TDDS is recorded in the pre-write area of each recording layer from the first to fourth layers, respectively. For example, if it contains TDDS, it can be recorded as '1' and not as '0'. If the recording medium has five or more recording layers or if there is a need other than this, it indicates whether or not to record. The first pre-write area flags 1 and / or the second pre-write area flags 2 may be separately included.

7 is a flowchart showing one embodiment of a data recording method according to the present invention. When the recording medium is loaded (S10), the recording and reproducing apparatus allocates an area including a first management area (e.g., TDMA, DMA, etc.), a user data area, and the like when the recording medium is formatted (S11). Then, management information about the allocated area is recorded in the TDMA (S12). The management information may include, for example, TDDS information having location information such as a first physical sector number (first PSN) of the allocated area.

If there is a recording start command from the drive or the host (S13), the recording / reproducing apparatus records the pre-write area before starting recording. In this case, management information regarding the allocated area may be repeatedly recorded in the pre-write area (S14). For example, the TDDS information currently recorded in the pre-write area may be repeatedly recorded for each recording unit, that is, for each cluster. At this time, the recording / reproducing apparatus may repeatedly record all the clusters included in the pre-write area, or may record some of the clusters and record the rest 00h. This is to record the management information in the pre-light area as necessary, it will be obvious that various modifications are possible. When the management information is recorded, the user data is recorded according to the command of the drive or the host (S15).

8A and 8B show another embodiment of the data recording and reproducing method according to the present invention. FIG. 8A is an enlarged view of TDMA0 in the recording medium as shown in FIG. The first cluster of TDMA0 may be assigned as an indicator. This depends on the number of recording layers. However, when one recording layer is provided as in FIG. 1, three clusters are allocated as indicators because TDMAs 1 and 2 are allocated to the spare area. The indicator refers to information indicating which TDMA is currently used and where it is located. For example, when data is recorded in TDMA1 as shown in Fig. 8, it indicates that the TDMA0 is already used up and that the TDMA1 is in use. At this time, whether or not the recording is made may be determined based on whether an RF signal is obtained. The indicator may include TDDS information to inform the position of the TDMA in use. However, when a defect occurs in the indicator and the RF signal can be obtained but the TDDS information cannot be obtained, it is necessary to easily obtain the TDDS information.

As illustrated by way of example in Fig. 8B, the recording medium of the present invention repeatedly records TDDS in each cluster in an area adjacent to TDMA0, for example, a pre-write area. In this case, the TDDS may be recorded in only or part of the first cluster of the pre-write area, and the rest may be recorded 00h. The recording and reproducing apparatus then reads the RF signal from the indicator and finds that the management information recording area currently being used is TDMA1. Then, the TDDS information of the immediately adjacent region can be read without having to read the data of the remaining TDMA0. The starting position information of the TDMA1 can be obtained from the TDDS so that it can be easily moved. Then, using the updated TDDS information recorded in TDMA1, data can be continuously recorded or reproduced at the current data recording position.

Although the present embodiment has been described using an indicator as an example, the present invention is not limited thereto. In addition, fixed structure information of the recording medium, that is, structure information that does not require updating of the current state in the recording / reproducing process (eg, For example, it is natural that structure information repeatedly recorded in the pre-write area can be used when the size information of the allocated area is required.

Fig. 11 shows an embodiment of the recording and reproducing apparatus according to the present invention. The recording / reproducing section 20 receives the signals read out from the pickup section 11 and the pickup section 11 for directly recording data on the recording medium or reading the data recorded on the recording medium and restoring the desired signal values. A signal processor 13 which modulates and transmits a signal to be recorded or a signal to be recorded into a signal recorded on a recording medium, and a pickup unit for accurately reading out a signal from the recording medium or accurately recording a signal on the recording medium. 11, a servo unit 14 for controlling, a memory 15 for temporarily storing management information and data including defect management information, and a first controller 16 for controlling the components. . In this regard, a recording / reproducing apparatus composed only of the recording / reproducing section 20 is also referred to as a “drive”, which can be utilized as a computer peripheral.

When the pickup unit 11 records data on the recording medium or reproduces the recorded data, the pickup unit 11 records the management information of the recording medium in the management area under the control of the first control unit 16 and obtains the position information from the management information. Read out.

At the start of recording, the first control unit 16 controls the pickup unit 11 to repeatedly record information on the structure of the recording medium recorded in the first management area, for example, DDS information, in the second management area. The second controller 12 is responsible for the control of the entire component. In particular, the second controller 12 receives a user command or the like through an interface with a user and records or reproduces data on a recording medium. The recording or reproducing command is transmitted to the recording and reproducing unit 20. In the present invention, it is apparent that the functions of the second control unit 12 and the first control unit 16 may be divided or operate as a single control unit.

The AV decoder 17 decodes the signal read out from the recording medium under the control of the second control unit 12, restores it to desired information, and provides the same to the user. The AV encoder 18 records a signal on the recording medium. Under the control of the second control unit 12, the input signal is converted into a signal having a specific format, for example, an MPEG2 transport stream, and provided to the signal processing unit 13.

As mentioned above, preferred embodiments of the present invention are disclosed for purposes of illustration, and those skilled in the art can improve and change various other embodiments within the spirit and technical scope of the present invention disclosed in the appended claims below. , Replacement or addition would be possible.

The above-described recording medium, recording / reproducing method and apparatus according to the present invention have the following effects.

That is, there is an advantage that the reliability can be secured by efficiently recording the management information and providing a repetitive recording area separately.

In addition, there is an advantage that the information on the structure of the recording medium can be easily obtained to facilitate accessibility.

Claims (23)

A user data area; A first management area in which information about the structure of the recording medium is recorded, and information about the structure of the recording medium is updated; And a second management area in which any one of the information about the structure of the recording medium is repeatedly recorded for each recording unit. The information about the structure of the recording medium according to claim 1, And information on the position or size of the first management area allocated to the recording medium. The information about the structure of the recording medium according to claim 2, And information on a temporary disc definition structure recorded on the recording medium at the start time of recording user data of the recording medium. The method of claim 2, wherein the first management area, And a temporary recording medium management area and / or a recording medium management area. The method of claim 1, wherein the second management area, And a recording medium provided on an inner circumference of the recording medium. The method of claim 5, wherein the second management area, And a pre-write area provided in the info area of the recording medium. The method of claim 6, wherein the temporary disk definition structure, A first flag indicating whether the pre-light area is recorded; And a second flag indicating whether the temporary disc definition structure has been recorded in the pre-write area. In a recording medium comprising at least one recording layer, each recording layer is A user data area; A first management area in which information about the structure of the recording medium is recorded, and information about the structure of the recording medium is updated; And a second management area in which any one of the information about the structure of the recording medium is repeatedly recorded for each recording unit. 9. The method of claim 8, wherein the information about the structure of the recording medium is: And information on the position or size of the first management area allocated to the recording medium. 10. The method of claim 9, wherein the information about the structure of the recording medium is: And information on a temporary disc definition structure recorded on the recording medium at the time of starting user data recording on the corresponding recording layer of the recording medium. The method of claim 8, wherein the second management area, And a recording medium provided on an inner circumference of the recording medium. The method of claim 11, wherein the second management area, And a pre-write area provided in the info area of the recording medium. Recording and updating management information including information on the structure of the first management area in a first management area of a recording medium; And repeatedly recording any one of the management information recorded in the first management area in a second management area for each recording unit. The method of claim 13, wherein the management information, And information on the position and / or size of the first management area allocated to the recording medium. The method of claim 13, wherein the management information recorded in the second management area, A recording method characterized by being recorded at a user data recording start step. The method of claim 13, wherein the management information, A recording method characterized by being a temporary disk definition structure or a disk definition structure. The method of claim 13, wherein the second management area, And a pre-write area provided on an inner circumference of the recording medium. The method of claim 13, wherein the recording method, When data is recorded in the second management area, 0 or 1 is recorded in the first flag for the second management area, Recording 0 or 1 in a second flag for the second management area when the management information is recorded in the second management area. Read management information of the recording medium provided in the first management area of the recording medium; If the information on the structure of the first management area cannot be read, management information of the second management area repeatedly recorded for each recording unit is read in the second management area of the recording medium, And recording data on the recording medium or reproducing the recorded data using the read management information. The method of claim 19, wherein the management information, And information on the position and / or size of the first management area allocated to the recording medium. The method of claim 19, wherein the management information, A recording and reproducing method, characterized in that it is a temporary disc definition structure or a disc definition structure. The method of claim 19, wherein the second management area, And a pre-write area provided on an inner circumference of the recording medium. A recording and reproducing apparatus for recording management information in a recording medium, And recording / reproducing section for repeatedly recording the management information recorded in the first management area of the recording medium in the second management area of the recording medium when the user data recording is started.

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