KR20050054324A - Method for managing a file system information of high density optical disc - Google Patents

Abstract

The present invention relates to a recording and reproducing method and apparatus through file system identification in a high density optical disc such as a Blu-ray Disc (BD). The optical disc has an area for recording file system information and the type of the recorded file system. And an area for recording identification information capable of recognizing the information, and when the optical disc provided with the identification information is loaded, checking the file system identification information recorded in the optical disc, and recording and reproducing the verification result. If it is not a file system, it displays a recording and reproducing method including stopping the recording and reproducing operation, and a fatal error even when different types of file systems are applied to the optical disc and the optical recording and reproducing period. Efficient utilization of optical disk is enabled without occurrence of There is an advantage to provide more convenient features.

Description

High density optical disc having file system identification information recorded thereon, and recording and reproducing method and recording and reproducing apparatus using the same [Method for managing a file system information of high density optical disc}

The present invention relates to a file system for managing data recorded in an optical disc. In particular, a high-density optical disc such as a Blu-ray Disc records information that identifies the type of file system and uses the same to record an optical disc. A recording and reproducing method and apparatus for reproducing.

As optical recording media, optical disks 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), the next-generation HD-DVD technology, is a next-generation optical recording solution that can contain data that significantly surpasses existing DVDs. Recently, world-standard technical specifications have been established.

In relation to this, development of an optical recorder using the Blu-ray Disc (BD) standard has been started, but it is difficult to develop a complete optical recorder since the Blu-ray Disc (BD) standard is not yet fully completed. It is true. In particular, the type of recording and reproducing is different depending on the file system applied to the Blu-ray Disc (BD). Therefore, the completion of the file system standard should be prioritized for the development of the optical recording and reproducing apparatus.

Accordingly, since the Blu-ray Disc (BD) standard has not yet provided the uniform file system standard, it will be said that there are many limitations in developing a full-fledged 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 an optical disk and a file system applied to an optical recording and reproducing apparatus. .

 In the optical disc, the identification information of the file system should be systematically provided as standardized information.

Another object of the present invention is to provide an efficient optical disc recording and reproducing method and apparatus using the file system identification information.

A high density optical disc according to the present invention for achieving the above object includes an area for recording file system information in the optical disc and an area for recording identification information for recognizing the type of the recorded file system. Characterized in that,

In addition, the recording and reproducing method of the high-density optical disc according to the present invention, when the optical disc is loaded, confirming the file system identification information recorded in the optical disc, and if the result of the check indicates that the file system is not capable of recording and reproducing, the recording and reproduction Characterized in that it comprises a step of stopping the operation,

Further, another recording and reproducing method for a high density optical disc according to the present invention is characterized in that the optical disc is formatted 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 optical disc. ,

In addition, the high-density optical disc recording and reproducing apparatus according to the present invention, in the optical recording and reproducing apparatus capable of recording and reproducing only for a specific file system, includes: a recording and reproducing unit for reading file system identification information of the loaded optical disc, 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.

     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 relation to this, when defining the "File System" used in the present invention, the data recorded on the disk and the files thereof are managed by a specific method, which is the file system of the optical disk. It is called). That is, in the file system, not only the attribute information of each file and the recorded position on the disk, but also information for overall file management on the relationship between the files, and the like are recorded.

In particular, when a specific type of optical disc standard is determined, the file system applied to the standard is also standardized. For example, in a BD-RE, a "Blu-ray Disc Rewritable Format Part" is used. 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 description, it is assumed that the file system to be applied to the "BD-RE Version 1.1" is a file system based on the "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 recorder (e.g., Vrsionon 1.0) supporting only a specific file system, it is obvious that when an optical disk (e.g., Vrsionon 1.1) managed by a different file system is loaded, it cannot be recorded and reproduced. will be. Hereinafter, this will be described in more detail with reference to FIG. 1.

Hereinafter, the present invention will be described by way of example, the progress of the standard of the Blu-ray Disc (BD) for convenience of explanation, which is just one example and will not be limited to the technical spirit of the present invention. .

FIG. 1 is a diagram to help conceptual understanding of the present invention, and illustrates the relationship of use between the optical recorder (100, 200, 300, 400) and the optical disc (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 except recording, but in particular, a player that plays back the Blu-ray Disc (BD) in consideration of the completion of the Blu-ray Disc (BD) standard to be solved in the present invention (BD-Player). Or, a description will be given by taking a recorder (BD-Recorder) for recording and playing back 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 problems, the optical recorder 200 and 400 should be able to check the file system applied to the loaded optical discs 102 and 103 at any time, and the present invention identifies the type of file system to solve this problem. It is characteristic of introducing information.

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 the recording / reproducing method of the 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 normal 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 may 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 the second embodiment. An example is a method of recording in the optical disc management area (FIGS. 5A and 5B).

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 (the spare area may not be allocated when recording an AV stream as an optional feature of the standard), 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 the case of a rewritable Blu-ray Disc (BD-RE), for example, an area in which file system information is recorded exists at the head part A and the end part B of the user data area. The file system information applied to the optical disc is recorded in the corresponding area. Of course, according to the specification, it will be apparent that an 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 the case of a rewritable Blu-ray Disc (using BD-RE Version 1.0, BDFS), for example, no 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, a file system name of "BDFS" is repeatedly recorded as the identification information (DFS_ID) in the area, so that the type of file system applied to the optical disc can be easily recognized.

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.

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. By recording, it will be possible for the optical record player to easily identify the type of file system.

5A and 5B relate to a method of the second embodiment for recording file system identification information (DFS_ID) in a high density optical disc according to the present invention, and to a method for recording identification information (DFS_ID) in an 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 is advantageous 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 interference with an OPC area and a pre-recorded area for calculating an 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 relates to a method of recording file system identification information (DFS_ID) in the defect management area (DMA), particularly of the two information areas INFO 1 and INFO 2 of FIG. 5A.

In detail, the first information area INFO 1 may be further divided into “Drive Area”, “DMA 1”, and “Control Data 1” areas, and the second information area INFO 2 may be referred to as “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. ), It can be said that there 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 corresponds to a byte, it can be said to be 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, from the pickup section 11 for controlling the operation of the pickup section 11 and the pickup section 11 for reading the management information including the data recorded on the optical disk and the file system identification information (DFS_ID), the pickup section 11 A memory for reproducing the received playback signal to a desired signal value or for temporarily storing the management information and the like, and a signal processor 13 for modulating and transmitting the signal to be recorded into a signal recorded on an optical disc; 15) and a microcomputer 16 for controlling the operation are basically constituted, and these components are collectively referred to as a recording / playback 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 a format, the control unit 12 formats the disc based on a specific file system supported by the controller, and displays the type of the specific file system. A command for recording the recognizable identification information (DFS_ID) in a specific area in the optical disc is transmitted to the recording / playback section 20. FIG. It is obvious that this applies not only to initial formatting, but also to re-initialization of disks.

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 is possible.

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.

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. There is an advantage to provide more convenient features.

Figure 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 / playback method using file system identification information of the present invention;

Fig. 4 shows a method of the first embodiment for recording the file system identification information of the present invention onto 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.

※ Explanation of code for main part of drawing

11 pickup 12 control unit

13 signal processing unit 15 storage means

17: AV decoder 20: recording and playback section

Claims (17)

And an area for recording file system information in the optical disc, and an area for recording identification information for recognizing the type of the recorded file system. The method of claim 1,       And the file system identification information is recorded in an area for recording file system information. The method of claim 2,       And the file system identification information is recorded at a head part in an area for recording file system information. The method of claim 2,      And the file system identification information is recorded at the end of the area in which the file system information is recorded. The method of claim 1, And the file system identification information is recorded in the optical disc management area. The method of claim 5, And the file system identification information is recorded in a defect management area (DMA). The method of claim 6, And the file system identification information is recorded in a disc definition structure (DDS) area in the defect management area (DMA). The method of claim 1, And said optical disc is a rewritable Blu-ray Disc (BD-RE). When the optical disc is loaded, checking the file system identification information recorded in the optical disc; And confirming that the file system is not capable of recording and reproducing, and stopping the recording and reproducing operation. The method of claim 9, If it is not a recordable file system, recording and reproducing the high density optical disc, characterized in that it further comprises a step of checking whether or not reformatting. The method of claim 9, If it is not a recordable file system, the recording and reproducing method of the high-density optical disk, characterized in that it further comprises the step of confirming whether or not converted to a recordable file system.       A recording and reproducing method for a high density optical disc, characterized in that the optical disc is formatted based on a specific file system, and identification information for recognizing the type of the specific file system is recorded in a specific area of the optical disc. The method of claim 12,       And a specific area in the optical disc 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 optical disc on which the file system identification information is recorded is an optical disc management area. The method of claim 12, And a specific area in the optical disc 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 in which the file system identification information is recorded is a disc definition structure (DDS) area in a defect management area (DMA). In the optical recording player capable of recording and reproducing only a specific file system, A recording / playback section for reading file system identification information of the loaded optical disc; A high density optical disc comprising: 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 reproduction is not possible as a result of the determination. Recording and playback device.