KR20070101852A - Recording medium, method and apparatus for managing a file system information of the recording medium - Google Patents

Abstract

A recording medium having file system identification information, a method of initializing the recording medium using the same, and apparatus and method of reproducing record are provided to initialize the recording medium by recording information identifying kinds of a file system. A recording medium having file system identification information includes an area recording file system information in the recording medium and an area recording identification information recognizing kinds of the recorded file system. The area recording identification information is located within the area recording file system information. The area recording identification information is located within a DMA(Defect Management Area). The recording medium is a reusable blue-ray disc. A method of reproducing the recording medium includes the steps of: checking file system identification information recorded in the recording medium; and stopping write/reproducing operation if the file system identification information is not reusable.

Description

Recording medium on which file system identification information is recorded, and a method and device for initializing, recording and reproducing a recording medium using the same, and the method and apparatus for recording and reproducing the same.

The present invention relates to a file system for managing a file recorded in a recording medium. In particular, the present invention records information identifying a type of file system in a high density recording medium, such as a Blu-ray Disc, A recording and reproducing method and apparatus for recording and reproducing a recording medium, and a method for recording and initializing information for identifying the type of the file system upon initialization of the recording medium.

As optical recording media, optical discs capable of recording large amounts of data are widely used. Among them, recently, a new high-density optical recording medium (HD-DVD) capable of recording and storing high-definition video data and high-quality audio data for a long time, for example, Blu-ray Disc (hereinafter referred to as "BD"). ) Is being developed.

Blu-ray Disc (BD), a next-generation recording medium technology, is a next-generation optical recording solution that can have data that significantly surpasses a conventional DVD.

In this regard, the Blu-ray Disc (BD) based optical record player has different forms of recording and playback depending on the file system applied to the Blu-ray Disc (BD). This should be prioritized, but there is currently no uniform file system application method, and thus, there are many limitations in developing an optical Blu-ray Disc (BD) -based optical recorder.

The present invention was created in view of the above circumstances, and an object of the present invention is to provide a new recording and reproducing method and apparatus applicable to a recording system and a file system applied to an optical recording and reproducing apparatus.

In addition, the present invention intends to provide a system of identification information of a file system as standardized information in a recording medium.

In addition, the present invention is to provide a method for initializing including the identification information of the file system at the initialization (initialization) of the recording medium.

The present invention also provides an efficient recording medium recording and reproducing method and apparatus using the file system identification information.

The recording medium according to the present invention for achieving the above object is characterized in that it comprises an area for recording the file system information in the recording medium, and an area for recording the identification information for recognizing the type of the recorded file system. It is done.

In addition, the recording and reproducing method of the recording medium according to the present invention comprises the steps of checking the file system identification information recorded in the recording medium, and if it is confirmed that the file system that can be recorded and reproduced, and stops the recording and playback operation Characterized in that it comprises a step.

In addition, the method of initializing a recording medium according to the present invention is characterized in that the recording medium is initialized based on a specific file system, and the identification information for recognizing the type of the specific file system is recorded in a specific area of the recording medium. .

In addition, another method of initializing a recording medium according to the present invention, while initializing the recording medium on the basis of any one of the two different file systems, the identification information for recognizing the type of the file system is initialized And recording in a specific area in the recording medium.

In addition, the recording and reproducing apparatus of the recording medium according to the present invention is an optical recording and reproducing apparatus capable of recording and reproducing only a specific file system, comprising: a recording and reproducing unit for reading file system identification information of a recording medium, and the read file system. And determining, from the identification information, whether or not recording / reproducing to the optical disc is possible, and if the recording / reproducing is impossible as a result of the determination, the control unit stops the operation of the recording / reproducing unit.

1 is shown to illustrate the conceptual understanding of the present invention.

Fig. 2 shows the use mode of the optical disc and the optical recording / reproducing period using the file system identification information of the present invention.

3 shows a recording and reproducing method using the file system identification information of the present invention.

Fig. 4 shows a method of the first embodiment for recording file system identification information of the present invention on an optical disc.

5A and 5B show a second embodiment method of recording the file system identification information of the present invention on an optical disc.

6 shows an optical recording and reproducing apparatus of the present invention.

Hereinafter, a preferred embodiment of a method of recording file system identification information of a high density optical disc according to the present invention and recording and reproducing the same using the same will be described in detail with reference to the accompanying drawings. In addition, the terms used in the present invention was selected as a general term widely used as possible now, but in certain cases, the term is arbitrarily selected by the applicant, in which case the meaning is described in detail in the description of the invention, The present invention is to be understood as the meaning of terms rather than names.

In the present invention, the term " recording medium " in the present invention refers to any medium on which data can be recorded, and encompasses all mediums regardless of a recording method such as an optical disc or a magnetic tape. Hereinafter, the present invention will be described by using an optical disc, in particular, a "Blu-ray Disc (BD)" as a recording medium for convenience of explanation, but it is obvious that the technical idea of the present invention is equally applicable to other recording media. will be.

In addition, in the present invention, the term "File System" is used as follows. In other words, the data recorded in the disk is managed in the form of a file, so that information including metadata managing the files recorded in the disk in a specific manner is stored in a file system. system). That is, in the file system, the attribute information of each file and the recorded position on the disk are recorded, and the information for overall file management on the relationship between each file is recorded.

In particular, when a specific type of optical disc standard is determined, the file system applicable to the standard is also standardized. For example, in the case of a BD-RE rewritable Blu-ray Disc Rewritable Format Part, 2, File System Specification Version 1.0, hereinafter referred to as " BD-RE Version 1.0 ".

In this regard, the file system basically applied in the "BD-RE Version 1.0" is a proprietary format of "BDFS (Blu-ray Disc File System)", or a new standard to be developed in the future, for example, "BD-RE Version 1.1". Different file systems may be applied. For convenience of explanation, it is assumed that the file system to be applied to the "BD-RE Version 1.1" is a file system based on "UDF (Universal Disk Format)" applied to the conventional DVD.

That is, a file system applied to an optical disc can be developed in various ways, and has a feature of mutual incompatibility between different file systems. Therefore, in the case of an optical record player (e.g., Vrsionon 1.0) that supports only a specific file system, when an optical disc (e.g., Vrsionon 1.1) managed by a different file system is loaded, it becomes impossible to record and play it. Will do. Hereinafter, this will be described in more detail with reference to FIG. 1.

FIG. 1 is a diagram to help conceptual understanding of the present invention, and is to illustrate the relationship of use between the optical recorder (100, 200, 300, 400) and the optical disks (101, 102, 103) in which the file system is recorded.

In this regard, the optical recorder (100, 200, 300, 400) of the present invention is a device capable of recording or reproducing optical discs of various standards. Depending on the design, only optical discs of a specific standard (for example, BD) can be recorded and reproduced. It is also possible to enable playback only without recording. However, in consideration of the development of a Blu-ray Disc (BD) based optical record player to be solved by the present invention, a player that plays back a Blu-ray Disc (BD) will be described below. A description will be given by taking an example of a BD-Player or a BD-Recorder for recording and reproducing a Blu-ray Disc (BD).

That is, the optical record player 100 is a recordable recorder (BD-Recorder) supporting "BD-RE Version 1.0", and the optical record player 200 is a play-only player (BD-Player supporting "BD-RE Version 1.0"). ) Or a recordable recorder (BD-Recorder), the optical record player 300 is a recordable recordable recorder (BD-Recorder) supporting "BD-RE Version 1.1", and the optical recorder 400 is a "BD-RE Version 1.1". Assume that it is a play-only player (BD-Player) or a recordable recorder (BD-Recorder) that supports ". As described above, " BD-RE Version 1.0 " "BD-RE Version 1.1" assumes that "UDF" is used as the file system.

Therefore, if a blank disc 101 or an unformatted disc 101 is formatted via the optical recorder 100, 300, the optical disc 102 will have the file system formatted as "BDFS", and the optical disc 103 is formatted as "UDF".

Subsequently, when the formatted optical discs 102 and 103 are to be recorded and reproduced by another optical recorder 200 or 400, the optical recorder 200 can support only "BDFS" as a file system. 102 is recordable and reproducible, but optical disc 103 formatted with a different file system (UDF) becomes impossible to record and reproduce. Similarly, since the optical record player 400 can only support " UDF " as a file system, an optical disc 103 formatted with the same file system (UDF) can be recorded and reproduced, while an optical disc 102 formatted with a different file system (BDFS) can be recorded and reproduced. It becomes impossible.

In addition, when an optical disc formatted with a different file system is loaded, the optical recorder 200 or 400 may recognize the loaded optical disc as an unformat state or fail to determine the type of the disc. However, there is a problem that the user needs to format the disc in order to force the format of the loaded optical disc by applying a file system supported by the optical recorder.

As a result, in order to solve the above problem, the optical recorder (200, 400) should be able to check the file system applied to the loaded optical disk (102, 103) at any time, the present invention can identify the type of file system to solve this problem The information is recorded in the optical disc.

Fig. 2 shows the use relationship between the optical disc and the optical recording / reproducing period using identification information for identifying the type of file system of the present invention.

The optical recorder (100, 300) formats the optical disc 101 into its own file system, and records information for identifying the type of the file system at a specific position in the optical disc. Hereinafter, information that can identify the type of the file system will be referred to as "file system identification information (DFS_ID (Disc File System IDentifier)").

Therefore, specific file system information (BDFS or UDF) and identification information (DFS_ID) identifying the same may be recorded on the formatted optical discs 102 and 103, respectively.

Then, when the formatted optical discs 102 and 103 are loaded into the optical recorder 200 or 400, the optical recorder 200 and 400 first checks the file system identification information (DFS_ID) recorded in the optical disc, thereby applying the file applied to the loaded optical disc. Since the system can be accurately identified, this minimizes errors caused by not recognizing the file system applied to the loaded optical disc. Hereinafter, a detailed operation of the optical recorder will be described with reference to FIG. 3.

Fig. 3 is a flowchart showing a recording / reproducing method of an optical disk according to the present invention. When the optical disk is loaded, the file system identification information (DFS_ID) recorded at a specific position in the optical disk is checked (S10), and from this the optical recording / reproducing apparatus is shown. It is determined whether or not recording and reproducing of the loaded optical disc is possible through comparison with the file system supported by the controller (S20).

If it is determined that recording and playback is possible in the above step, recording and playback will be performed as a general operation (S30). If it is determined that recording and playback is impossible, the recording and playback operation is stopped and the following several steps are performed step by step or independently. (S40).

First, if it is determined that the optical recorder is an optical disc that cannot be recorded and reproduced, a warning message is displayed to the user (S401). The warning message can be expressed in the usual way, such as "The disk is not supported by the system (filesystem error)."

Also, the optical recorder may transmit a guide message for recommending the format to the user (S402). For example, a message may be provided, such as "The file system of the data recorded on the disk is different from the file system of the system, so the disk must be reformatted before it can be used."

In addition, the optical recorder may transmit a guide message for recommending the user to change the file system (S403). For example, a message may be provided such as "The file system of the data recorded on the disk is different from the file system of the system, so it can be used only after the disk is converted to a file system supported by the system."

Therefore, it can be seen that the operation of the optical recorder can be provided once the corresponding file system identification information (DFS_ID) is provided from the optical disk. Hereinafter, the file system identification information (DFS_ID) is stored in the optical disk through FIGS. We will explain in detail how to record.

In the present invention, two embodiments are largely provided as a method of recording " file system identification information (DFS_ID) " in an optical disc. The first embodiment is a method of recording in a file system information area (FIG. 4) and a second method. The embodiment is a recording method in the optical disc management area (FIGS. 5A and 5B). However, the embodiment to be described later is only an example, and thus, the file system identification information DFS_ID is not limited to a specific method, and any file system of different types may be used.

Fig. 4 relates to a first embodiment method for recording file system identification information (DFS_ID) in a high-density optical disc according to the present invention, wherein the identification information (DFS_ID) is recorded in a file system information area. It is about how to.

The optical disc is largely divided into three areas: the lead management area (Lead-In) and the lead-out area (Lead-Out), which are disk management areas, are located at the inner and outer circumferences respectively. A data area exists between the lead-out areas and the lead-out areas. In addition, a spare area for managing defects in a disk may exist at the front and the rear of the data area, and a user data area in which substantial data is recorded between the spare areas. ) Exists.

If the spare area does not exist (it depends on the disc format, and generally does not allocate a spare area when recording an AV stream), the entire data area will be the user data area. In particular, the user data area is an area managed by the file system, also referred to as a logical volume.

Therefore, in FIG. 4, the start of the user data area will start from the beginning of the data area if no spare area exists (Logical Volume start ①), and if the spare area exists, it will start from the next recordable area of the spare area (Logical Volume start). ②). The ends of the user data areas (Logical Volume ends 1 and 2) are also determined in the same manner as above.

In other words, the case of the rewritable Blu-ray Disc (BD-RE) will be described as an example. In the head portion A and the end portion B of the user data area, file area information is recorded (File System Information Area). File system information applied to the optical disc in the corresponding area is recorded. Of course, according to the optical disc standard, it will be apparent that the file system information area in which the file system information is recorded may exist at different locations in the user data area.

The present invention is characterized in that the file system identification information (DFS_ID) is recorded at the beginning and / or the end of the file system information area.

In other words, in the case of a rewritable Blu-ray Disc (using BD-RE Version 1.0, BDFS), for example, other information is recorded in the predetermined size (LBN 0 to LBN 511, LBN: Logical Block Number) of the first part. As a non-area area, the file system name " BDFS " is repeatedly recorded as the identification information DFS_ID in the area so that the type of file system applied to the optical disk can be easily recognized. In this connection, it is also possible to continuously record the zero value " 00h " as the identification information DFS_ID in the area.

Also, for example, the case of a rewritable Blu-ray disc (using BD-RE Version 1.1, UDF), which will be discussed in the future, will be different from the other information as long as the size of the head part (the size will be different from Version 1.0). Is an area in which the file system name "UDF" is repeatedly recorded as the identification information (DFS_ID) in this area.

Similarly, the file system identification information DFS_ID may be recorded at the end of the file system information area in which the file system information existing at the end portion B of the user data area is recorded. Since it is the same as the recording method in (A), it will be omitted.

In addition, as described above, if there are two kinds of different file systems, for example, in the case of utilizing a "BDFS" file system, a zero value as file system identification information (DFS_ID) in the same area is used. ("00h") is recorded in succession, but if the "UDF" file system is used, two different types of file systems (ie, "BDFS") are not recorded without recording separate identification information (DFS_ID) in the same area. It is also possible to distinguish between "filesystem" and "UDF" filesystem.

Therefore, in the first embodiment of the present invention, the file system identification information (DFS_ID) is displayed at the head and / or the end of the file system information area in which the file system information is recorded. To record, or to distinguish two different file systems, zero values ("00h") are recorded consecutively for only one file system type, and zero values ("00h") for the remaining file systems. By not writing, it is possible to distinguish between two different file systems.

5A and 5B relate to a method of recording the file system identification information DFS_ID in the high density optical disc according to the present invention, and to a method of recording the identification information DFS_ID in the optical disc management area.

The management area of the optical disc means an area in which disc management information other than a data area is recorded. The lead-in area and lead-out area in FIG. 5A correspond to this.

In particular, recording the file system identification information (DFS_ID) of the present invention in the lead-in area has an advantage in that the area accessed first when the optical disc is loaded is the lead-in area.

Fig. 5A shows an example of a rewritable Blu-ray Disc (BD-RE) case, in which the lead-in area is again pre-recorded area and re-writable area when the disc is produced. The re-writable area is again divided into two information areas (INFO 1 and INFO 2) for recording various management information and an interference between the OPC area and the pre-recorded area for calculating the optimal recording power. It is divided into a protection zone for protection.

In the present invention, the file system identification information (DFS_ID) is recorded in at least one or more of the two information areas (INFO 1, INFO 2). For example, if a specific byte is allocated and "00h", the "BD-RE Version" 1.0, BDFS ", and " 01h " is defined as" BD-RE Version 1.1, UDF ". If there are more filesystem types to distinguish, they can be defined in the order of "02h", "03h".

FIG. 5B shows in particular the two information areas INFO 1 and INFO 2 of FIG. 5A.

A method of recording file system identification information (DFS_ID) in a defect management area (DMA).

In detail, the first information area INFO 1 is further divided into “Drive Area”, “DMA 1”, and “Control Data 1” areas, and the second information area INFO 2 is divided into “DMA 2”, Each is divided into "Control Data 2" areas.

The dual DMA area is an area allocated for disk defect management and the like. DMAs 1 and 2 are provided in the lead-in area, DMAs 3 and 4 are provided in the lead-out area, and a total of 4 DMAs exist in the disc. Each DMA 1,2,3,4 is used in a manner of repeatedly recording the same information. Therefore, recording the file system identification information (DFS_ID) of the present invention in the DMA area means recording all four simultaneous DMA areas. This means that even if any one of the identification information (DFS_ID) is damaged, the other identification information (DFS_ID) is recorded. Can be used, which is a great advantage in protecting the identification information (DFS_ID).

In addition, the DMA is further divided into disc definition structure (DDS) information and a defect list (DFL), and the present invention records file system identification information (DFS_ID) in the disc definition structure (DDS) information. It is done.

In the case of a rewritable Blu-ray Disc (BD-RE), the disc definition structure (DDS) information is an area for recording various disc management information as well as information for disc defect management, and the size of the area (DDS) is about 64k. Since it is a byte, it can be called an area where enough management information can be recorded (that is, there are many "reserved areas"). Hereinafter, the method of recording the identification information (DFS_ID) in the disk definition structure (DDS) information is applied in a manner of assigning identification information for each file system such as "00h" and "01h" as described in FIG. 5A. You will.

Therefore, the second embodiment of the present invention records the file system identification information (DFS_ID) at an arbitrary position in the disc management area, but preferably in the disc definition structure (DDS) information in the DMA, whereby the optical recorder The type of file system can be checked, and the identification information (DFS_ID) can be recorded separately in a plurality of areas (DMAs 1,2,3,4), which is advantageous in protecting the file system identification information (DFS_ID). Will have

Fig. 6 shows a detailed configuration of the optical recording and reproducing apparatuses 100, 200, 300, and 400 for recording and reproducing using file system identification information (DFS_ID) in the high density optical disc of the present invention.

First, the pickup section 11 for reading management information including data recorded on the optical disk and file system identification information (DFS_ID), the servo section 14 and the pickup section 11 for controlling the operation of the pickup section 11 are provided. A signal processing unit 13 for restoring a reproduction signal received from the signal to a desired signal value or modulating and transmitting the signal to be recorded into a signal recorded on an optical disc, and temporarily storing the management information. The memory 15 and the microcomputer 16 for controlling the operation are basically constituted, and these components are collectively referred to as the recording and reproducing section 20.

In addition, the AV decoder 17 finally decodes the output data under the control of the controller 12 and provides the same to the user. The AV encoder 18 controls the controller 12 to perform a function of recording a signal on an optical disc. The input signal is converted into a signal of a specific format, for example, an MPEG2 transport stream, and provided to the signal processing unit 13 in the recording / reproducing unit 20 under the control of.

The control unit 12 also controls the operation of the entire optical recorder, and checks the file system applied to the corresponding optical disc from the read file system identification information DFS_ID, and records and reproduces the recorded optical disc through the loaded optical disc. After determining whether this is possible, if it is determined that recording and reproduction is not possible, a command for stopping the operation of the recording and reproducing unit is transmitted.

Subsequently, the control unit 12 delivers a warning message and / or a guide message to the user as in steps S401, S402, and S403 of FIG. 3, and performs a user request through an interface with the user. Will be That is, the corresponding command is transmitted to the recording / playback section 20 so as to reformat the optical disk or change the file system according to the user's request.

In addition, when an unformatted disc is loaded and a user requests for initialization, the control unit 12 initializes the disc based on a specific file system supported by the user, and the specific file system. The recording / reproducing unit 20 transmits a command to record the identification information DFS_ID which can recognize the type of data in a specific area in the optical disc by any of the above-described embodiments. It will be apparent that this applies not only during initialization, but also when re-initializing a disk.

The specific area in the optical disc on which the file system identification information (DFS_ID) is recorded is a file system information area as shown in FIG. 4 or an information area (INFO 1 and 2) in the management area as shown in FIG. 5A, or As shown in FIG. 5B, all of the disk definition structure (DDS) in the DMA may be possible.

Through the file system identification information of the high density optical disc according to the present invention, even when different types of file systems are applied to the optical disc and the optical recording / reproducing period, efficient use of the optical disc is possible without causing a fatal error. This has the advantage of providing more convenient functions.

Or more, preferred embodiments of the present invention described above are disclosed for the purpose of illustration, those skilled in the art within the spirit and the technical scope of the present invention disclosed in the appended claims, and further various other embodiments, Modifications, substitutions or additions may be made.

Claims (21)

An area for recording file system information in a recording medium; And an area for recording identification information for recognizing the kind of the recorded file system. The method of claim 1, And an area for recording the file system identification information is provided in an area for recording file system information. The method of claim 2, And an area for recording the file system identification information is provided at the beginning of the area for recording the file system information. The method of claim 2, And an area for recording the file system identification information is provided at the end of the area for recording the file system information. The method of claim 1, And an area for recording the file system identification information is provided in a recording medium management area. The method of claim 5, And an area for recording the file system identification information is provided in a recording medium defect management area (DMA). The method of claim 6, And an area for recording the file system identification information is provided in a disc definition structure (DDS) area in the defect management area (DMA). The method of claim 1, The recording medium is a rewritable Blu-ray Disc (BD-RE). Checking the file system identification information recorded in the recording medium; And if it is determined that the file system is not capable of recording and reproducing, displaying the same and stopping the recording and reproducing operation. The method of claim 9, If not a file system capable of recording and reproducing, recording and reproducing the recording medium further comprises the step of checking whether or not reformatting. The method of claim 9, If not a file system capable of recording and reproducing, the method of recording and reproducing the recording medium, characterized in that it further comprises the step of confirming whether or not to convert to a file system capable of recording and reproducing. Initialize the recording medium based on the specific file system, And the identification information for recognizing the type of the specific file system is recorded in a specific area of the recording medium. The method of claim 12, And a specific area in the recording medium on which the file system identification information is recorded is an area for recording file system information. The method of claim 12, And a specific area in the recording medium on which the file system identification information is recorded is a recording medium management area. The method of claim 12, And a specific area in the recording medium on which the file system identification information is recorded is a defect management area (DMA). The method of claim 12, And a specific area in the optical disc on which the file system identification information is recorded is a disc definition structure (DDS) area in a defect management area (DMA). Initialize the recording medium based on one of two different file systems. And the identification information for recognizing the type of the initialized file system is recorded in a specific area of the recording medium. The method of claim 17, And said two different file systems are a "BDFS" file system and a "UDF" file system, respectively. The method of claim 18, And a zero value (zero) is recorded as identification information for recognizing the type of the file system in a specific area within the recording medium when initializing the file based on the "BDFS" file system. The method of claim 19, And a zero value is not recorded as identification information for recognizing the type of the file system in a specific area of the recording medium when initializing on the basis of the "UDF" file system. In the optical recording player capable of recording and reproducing only a specific file system, A recording and reproducing unit for reading file system identification information of the recording medium; And a control unit for determining whether or not recording and reproducing to the corresponding optical disc is possible from the read file system identification information, and stopping the operation of the recording and reproducing unit if the recording and reproducing is not possible as a result of the determination. Recording and playback device.

Images