KR20010081272A - File management method for recorded digital data stream - Google Patents

Abstract

PURPOSE: A managing method for a file of a recording digital stream is provided to display an error message in reproducing and recording operations according to change in a file name or a file directory. CONSTITUTION: In a mounted state of a DVD in a disk driver, manage information including a file recognizing descriptor and a file entry is read and stored as a database. By receiving a command of changing a file name, the file descriptor and the file entry are detected for checking kind of the file. In case of a data file, the file name is changed. In case of a real time data file, a message about an error after changing the file name is displayed on a monitor. In case of receiving the command for changing the file name, the file name is changed.

Description

File management method for recorded digital data stream

The present invention provides a file of a recording digital stream so that a file name or directory of a real-time data file recorded on a disk recording medium such as a rewritable DVD (DVD-RAM, DVD-RW, etc.) is not changed arbitrarily through a personal computer. It is about management method.

First, FIG. 1 shows a partial configuration of an optical disc device such as a video disc recorder (VDR) for recording or reproducing a signal on a disc recording medium such as a rewritable DVD. The optical disc device is rewritable. An optical pickup 2 for reading out a signal recorded on a disc recording medium such as a DVD 1 or for recording an input signal processed data stream from the outside; A VDR system (3) for reproducing signal processing the signal read out from the optical pickup (2) or converting the data stream input from the outside into a data stream suitable for recording; And an encoder 4 which encodes an analog signal input from the outside and outputs the analog signal to the VDR system 3. The operation of the optical disc device configured as described above, in particular, through a digital interface A file management method of a recording digital stream which performs a file name or directory change of a data file recorded on the rewritable DVD 1 by a connected personal computer (PC), will be described in detail with reference to the accompanying drawings. The explanation is as follows.

First, various types of data files are recorded and managed in a disc recording medium such as the rewritable DVD 1, and the data file includes a data stream file and a management information file for managing the same. The data stream file is divided into and stored in the data stream file, and video data, audio data, and text data, which are large amounts of real-time data, are recorded and stored in the data stream file, and the video data and audio are stored in the management information file. Management information for data and character data is recorded and managed.

On the other hand, the file management method of the recording digital stream which records and manages the data stream file and the management information file as described above has a plurality of title set directories under one root directory, respectively, We use a fixed specific file structure that records and manages files with various extensions in the title set directory.

For example, a large amount of real-time video data is recorded and managed as a data file having various extensions in the Video Title Set (Video_TS) directory under the root directory as shown in FIG.

That is, the video title set directory includes a 'Video_TS.IFO' file in which video management information is recorded and stored, a 'Video_TS.VOB' file in which menu information of a video recording object (VOB) is recorded, and a backup ( 'Video_TS.BUP' file that records and manages video management information, 'VTS_01_0.IFO' file that stores information about the first video title set, and 'VTS_01_1' that first video record set is recorded and stored. A VOB 'file, a' VTS_01_2.VOB 'file in which a second video recording assembly is recorded and stored, a' VTS_01_0.BUP 'file in which information about a backup video title set is recorded and stored, and the like are recorded and managed.

Meanwhile, as shown in FIG. 3A, a descriptor tag field, a file version number field, and a file are included in a file identifier descriptor in which detailed information about the files is recorded and stored. File Characteristics field, Length of File Identifier (L_FI) field, Information Control Block (ICB) field, Length field of implementation use data, Implementation use field And a file identification (N_FI: Name of File Identifier) field and a padding area, wherein the file identification field records and stores character data corresponding to a file name, and the length field of the file identification data corresponds to the file name. The length of the character data to be recorded is stored and stored in the file attribute field having a size of one byte, as shown in FIG. Identification information: presence or absence identification information in the first bit, directory identification information in the second bit, identification identification in the third bit, parent identification information in the fourth bit, and meta in the fifth bit. Data identification information is recorded, and the remaining sixth to eighth bits are used as a reserved area for recording identification information to be used later.

Therefore, in the VDR system 3 of the optical disc apparatus, when a specific video title set desired by the user, for example, the first video title set is required for playback, a video title set (Video_TS) directory under the root directory is required. Search for and read files having various types of extensions recorded in the searched video title set directory, wherein a user searches for a file identification field (N_FI), namely, a file name, included in the file identification descriptor. By reading and playing back the management information file and the video data file of the first video title set corresponding to the file name requested for reproduction, the video data corresponding to the file name requested by the user is reproduced and output in real time.

On the other hand, the optical disk device as described above, can be used in connection with a personal computer through a digital interface, and the rewritable DVD (1) can be inserted into the disk drive of the personal computer to be played back and recorded, the personal A user using a computer changes the file name of the real-time data file recorded and stored on the rewritable DVD 1 to any file name desired by the user, or changes the real-time data file to any directory desired by the user. You can do it.

However, as described above with reference to FIG. 2, the real-time data file recorded and stored in the rewritable DVD must use a file name that is previously standardized so that the VDR system of the optical disk device can recognize the file. Since the user must change the file name of the real-time data file or change the directory at random through the personal computer as described above, the VDR system cannot recognize the file name. There is a problem that results in the inability to perform an operation or a recording operation.

Therefore, the present invention was created to solve the above problems, and when a user arbitrarily requests a file name or file directory of a real-time data file recorded on a disc recording medium such as a rewritable DVD, through a personal computer, It is an object of the present invention to provide a file management method of a recording digital stream which guides and displays a message warning of an error in the reproduction or recording operation of a corresponding file after the change.

1 shows a part of an optical disk device such as a video disk recorder (VDR),

2 shows a data file structure of a rewritable DVD,

3 shows a recording field of a general file identification descriptor,

4 shows a part of the configuration of a personal computer to which the file management method of a recorded digital stream according to the present invention is applied;

5 and 6 show recording fields for file identification descriptors and file entries stored in a database in a personal computer to which the present invention is applied;

7 is a flowchart illustrating an operation of a file management method of a recording digital stream according to the present invention;

Fig. 8 shows an operational flowchart of another embodiment of the file management method of the recording digital stream according to the present invention.

※ Explanation of code for main part of drawing

1: Optical disc 2: Optical pick-up

3: VDR system 4: Encoder

10: disk driver 20: personal computer

21: operating system (O / S) 22: hard disk

30: monitor

According to an aspect of the present invention, there is provided a file management method of a recording digital stream, the method of managing a file of a rewritable optical recording medium, the method comprising: checking a type of a requested file when a data file name change request is made; And if the type of the identified file is a real-time data file, comprising two steps of guiding and displaying a message warning of a playback error after the file name is changed.

In addition, the file management method of the recording digital stream according to the present invention comprises: a file management method of a rewritable optical recording medium, comprising: a step of checking a file type in a requested directory when a directory change request of a data file is requested; And if the type of the checked file is a real-time data file, step 2 of guiding and displaying a message that warns of a playback error after changing the corresponding directory.

Hereinafter, a file management method of a recording digital stream according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First, FIG. 4 schematically illustrates a personal computer to which the file management method of a recording digital stream according to the present invention is applied. In the operating system 21 of the personal computer, a rewritable DVD is inserted into and seated in the disk driver 10. In this case, after reading management information about the data files recorded and stored on the DVD, the database is managed to be searchable on the operating system 21, and the data file is stored in the ROM 21a attached to the operating system 21. File names for the fields are recorded and stored. In particular, when a user requests to change a file name or file directory of an arbitrary real-time data file through a personal computer, management information for searching and confirming the type of the requested file is shown in FIG. 5. As shown in FIG. 5, all of the file identification descriptor FID and the contents of the file entry are included. Is the storage managing part, in searchable database on the operating system (21).

On the other hand, the file identification descriptor is recorded and stored in the detailed information about the file, the information control block (ICB: Information Control Block) field that specifies the address of the file entry in which the detailed information about the specific file is stored An information control block tag (ICB Tag) field in which the file entry is recorded and includes file type information of one byte indicating the type of the file, as shown in Fig. 6A. The recorded data file of the rewritable DVD, that is, a real time data file, is defined as a file type '249', as shown in FIG.

Accordingly, in the operating system of the personal computer, when the user requests an arbitrary data file name change or a file directory change, the user searches for and confirms the type of the requested file, and the real-time data file stored in the DVD recordable type of the retrieved file. In this case, a guide message for preventing a file name or directory change is displayed on the screen of the monitor 30. The above operation will be described in detail with reference to the accompanying drawings.

7 is a flowchart illustrating a method of managing a file of a recorded digital stream according to the present invention. In particular, FIG. 7 is a flowchart illustrating an operation of guiding and displaying a warning message when a file name change request of a real-time data file recorded on a rewritable DVD is requested. For example, in the operating system 21 of the personal computer, when a rewritable DVD is inserted and seated in the disk driver 10 (S10), as described above, a file identification descriptor and a file in which detailed information about the files are recorded and stored. The management information including the entry is read out and stored in the database (S11).

Subsequently, when a file name change of a specific file is received from the user (S12), from the information control block (ICB) of the file descriptor stored and managed by the database, a recording position of the file entry of the requested file, namely, After searching and confirming the address of the file entry, the file entry designated by the address is searched to confirm the type of the file recorded in the searched file entry.

In this case, when the checked file type is a normal data file, a file name change operation for changing the file name requested by the user is performed (S18), and the checked file type is stored in a real-time data file, ie, a rewritable DVD. In the case of a data file, a message indicating that playback or recording error of the file occurs after the file name change is displayed on the screen of the monitor 30 (S15), so that the user can cancel the requested file name change request. If the user requests to confirm the file name change again after displaying the warning message (S16), the operation of changing the file name of the corresponding file is performed according to the user's confirmation request (S16). Then, if the user cancels the file name change request (S17), the file name change request of the file You will cancel.

Therefore, when a file name change request is made for a file name change of a real-time data file that causes an error in the reproduction or recording operation of the file after the file name change, a message is displayed to warn the occurrence of the reproduction error in advance. The file name of the file can be prevented from being arbitrarily changed in advance. In the operating system 21, when the file name requested by the user is different from the specific file name stored in the ROM 21a attached to the operating system 21, If it differs from a specific file name previously prescribed so that it can be recognized by the VDR system 3 of the optical disc device which reproduces or records the rewritable DVD, a warning message for guiding the occurrence of a reproduction error may be additionally displayed.

Meanwhile, FIG. 8 is a flowchart illustrating an operation of displaying a message for guiding a reproduction error when a directory change request of a real-time data file recorded on a rewritable DVD is performed in the method for managing a recording digital stream according to the present invention. As described above with reference to FIG. 7, in the operating system 21 of the personal computer, when a rewritable DVD is inserted and seated in the disk driver 10 (S30), a file identification descriptor for recording and storing detailed information about the files and The management information including the file entry is read out and stored in the database (S31). Subsequently, when a directory change request of a specific file is received from the user (S32), information control of the file descriptor stored and managed by the database is performed. From the block (ICB), the write location for the file entry of the requested file, i. After checking the address of the search entry and searches for the file entry specified by the address, included in the retrieved file entry is to determine the type of the recorded file.

At this time, if the checked file type is a normal data file, a file directory change operation for changing to a file directory according to a user's request is performed (S38), and if the checked file type is a real-time data file, the file directory A warning message is displayed on the screen of the monitor 30 to indicate that a file playback or recording error occurs after the change (S35), so that the user can cancel the requested file directory change request. After the warning message is displayed, when the user requests confirmation of the file directory change again (S36), an operation of changing the file directory of the corresponding file is performed according to the user's confirmation request (S36). If the user cancels the file directory change request (S37), the file directory change of the file is changed. It will cancel the request.

Therefore, when a directory change request is made for a real-time data file that causes an error in the reproduction or recording operation of the file after a file directory change, a warning message for warning the occurrence of the error is displayed in advance, thereby real-time data due to user carelessness. It is possible to prevent the directory of the file from being changed arbitrarily.

In the file management method of the recording digital stream according to the present invention, the file name or file directory of a data file recorded on a disc recording medium such as a rewritable DVD is changed when a user arbitrarily requests a change through a personal computer. After that, by displaying a warning message warning the occurrence of an error in the playback or recording operation for the file, it is possible to prevent the file name or file directory of the real-time data file from being randomly changed through a personal computer due to user's carelessness. It is a very useful invention.

Claims (8)

In the file management method of a rewritable optical recording medium, When the data file name change request is made, checking the type of the requested file; And And if the type of the checked file is a real-time data file, the step of displaying a message warning the occurrence of a reproduction error after the file name change. The method of claim 1, And after the warning message is displayed, further comprising the step of changing the data file name when requesting confirmation of the data file name change. In the file management method of a rewritable optical recording medium, Checking a file type in the requested directory when a directory change request of the data file is made; And And if the type of the checked file is a real-time data file, comprising the step of guiding and displaying a message that warns of a reproduction error after a corresponding directory change. The method of claim 3, wherein And a third step of changing the directory of the file when requesting to change the directory of the file after displaying the warning message. The method according to claim 1 or 3, And the identification information of the type of file is recorded and managed as one byte in an information control block (ICB) tag field of a file entry. The method of claim 5, And the file entry is specified by an information control block address (ICB address) of a file identification descriptor in which detailed information about the files is recorded and stored. In the file management method of a rewritable optical recording medium, Checking a requested file name when a data file name change request is made; And And if the checked file name is different from a predetermined file name, a step of guiding and displaying a message warning of occurrence of a playback error after the file name change. The method of claim 7, wherein And after the warning message is displayed, further comprising the step of changing the data file name when requesting confirmation of the data file name change.