KR20010091826A - File management method for recorded digital data stream - Google Patents

Abstract

PURPOSE: A method for managing a file of a record digital stream is provided to prevent a data record error and a play error due to change of a file directory or a file name of a real time data file. CONSTITUTION: Upon request for data record, it is determined whether a file or a file directory which is prestored in an optical recording medium is in a normal state. If it is judged to be in an abnormal state, a name of the file directory is changed into other file directory name. After normal file directory and file which are distinguished from the changed file directory name are generated, inputted data are recorded. Whether the file or the file directory which is prestored in the optical recording medium is in the normal state is judged depending on whether the above file or the file directory is coincided with a real time data file or a real time file directory which is made in advance. If a management information file with respect to real time data files which are previously stored in the optical recording medium is not searched and identified, it is judged that the file or the file directory which is prestored in the optical recording medium is in an abnormal state.

Description

File management method for recorded digital data stream

The present invention can prevent the occurrence of data recording and playback errors due to a change in the file name or directory of a real-time data file recorded on an optical recording medium such as a rewritable DVD (DVD-RAM, DVD-RW, etc.). A file management method for recording digital streams.

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 an optical record medium such as a rewritable DVD, wherein the optical disc device is rewritable. An optical pickup 2 for reading out a signal recorded on an optical 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 description of the optical disc device configured as described above, in particular, a personal computer (PC) may be included. A file management method of a recording digital stream for performing a file name or directory change of a real-time data file recorded on the rewritable DVD 1 on an operating system (OS) of the present invention will be described in detail with reference to the accompanying drawings. As follows.

First, various types of data files are recorded and managed in an optical 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 for recording and managing the data stream file and the management information file as described above has a plurality of real-time audio and video directories (DVD_RTAV: DVD Realtime AV) under one root directory. Again, we use a fixed specific file structure that records and manages files with multiple extensions in each real-time audio and video directory.

For example, in the real-time audio video directory, as shown in FIG. 2, a "VR_MANAGER.IFO" file in which video recording management information is recorded and stored, a "VR_MOVIE.VRO" file in which video and video are recorded, and a still image. The 'VR_STILL.VRO' file where the video is recorded and stored, and the 'VR_AUDIO.VRO' file where the audio is recorded and stored are recorded and managed.

Meanwhile, as shown in FIG. 3A, a descriptor tag field, a file version number field, and a file attribute are included in a file identifier descriptor in which detailed information about the files is recorded and stored. ) Field, Length of File Identifier (L_FI) field, Information Control Block (ICB) field, Length field of implementation use data, implementation use field, file identification ( N_FI: Name of File Identifier (N_FI) field and a padding area are recorded, and the file identification field records and stores the character data corresponding to the file name, and the length field of the file identification data includes the character data corresponding to the file name. The length is recorded and stored, and in the file attribute field having a size of 1 byte, as shown in FIG. Beam, i.e., presence information in the 1st bit, directory identification in the 2nd bit, identification information in the 3rd bit, parent identification information in the 4th bit, and meta data in the 5th bit. 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.

Accordingly, in the VDR system 3 of the optical disc device, a real time audio video directory under the root directory is searched according to a user's request, and files having various types of extensions recorded in the searched real time audio video directory are read out. In this case, the file name field (N_FI) recorded in the file identification descriptor, that is, the file name is searched for and reads and reproduces the management information file and the video data file corresponding to the file name requested by the user, thereby reproducing the file name requested by the user. The video data corresponding to the video is reproduced and output in real time.

On the other hand, a user using the optical disk device as described above may change the file name of the real-time data file recorded and stored in the rewritable DVD 1 to an arbitrary file name desired by the user on the operating system (OS) of the personal computer. Alternatively, the real-time data file can be changed to any directory desired by the user.

However, as described above with reference to FIG. 2, the real-time data file recorded and stored in the rewritable DVD must use a real-time data file name that is pre-qualified so as to be recognized by the VDR system of the optical disc device. Since the user must change the file name of the real-time data file or change the directory arbitrarily on the operating system (OS) of the personal computer as described above, the VDR system can recognize this. There is a problem that results in a result that will not be able to perform the normal data recording operation and playback operation afterwards.

Therefore, the present invention was created to solve the above problems, and when the file name of the real time data file is arbitrarily changed through a personal computer, the directory name of the file is arbitrarily changed, and the normal real time data file and the file. It provides a file management method of a recording digital stream by creating a directory and recording and managing input data so that data recording errors and playback errors do not occur due to a file name or file directory change of a real-time data file. Is there.

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,

3A and 3B show recording fields of a general file identification descriptor,

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

5A and 5B illustrate a data file structure having a file name arbitrarily changed by a user and a warning message screen accordingly;

6 shows a data file structure recorded and managed by the file management method of a recorded digital stream according to the present invention;

7 shows a reproduction error guide message displayed on the screen by the file management method of the recorded 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

The file management method of a recording digital stream according to the present invention for achieving the above object, in the data recording of the rewritable optical recording medium, when the data recording request, the normal of the file or file directory previously stored in the optical recording medium 1 step of determining whether or not; If the determination result is abnormal, changing the file directory name to another file directory name; And generating a normal file directory and a file distinguished from the changed file directory name, and then recording the input data.

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 is a flowchart illustrating a method for managing a file of a recording digital stream according to the present invention. For example, real time data recorded on a rewritable optical recording medium by a user on an operating system (OS) of a personal computer. After arbitrarily changing the file name or file directory of the file, a rewritable optical recording medium whose file name or file directory has been arbitrarily changed as described above is inserted and seated in the optical disk device as described above with reference to FIG. In the case of recording on a rewritable optical recording medium, there is shown an operation flowchart performed by the file management method of the recording digital stream according to the present invention.

First, as shown in FIG. 4, in the state where the rewritable optical recording medium is inserted and seated in the optical disk device (S10), when a recording request for recording the input data stream is received (S11), the VDR system ( In 3), the file name and file directory of the real-time data file recorded and stored on the rewritable optical recording medium are retrieved (S12).

Then, it is determined whether or not the file name or file directory of the searched real-time data file matches the normal real-time data file name and file directory previously prescribed so that the VDR system 3 can recognize it (S13). As a result, when the retrieved file name and file directory match the pre-defined file name and file directory, the normal data recording operation of recording and storing the input data stream on the rewritable optical recording medium is performed (S14).

On the other hand, if the file name and file directory retrieved as a result of the determination do not match the file name and file directory previously prescribed, for example, as shown in FIG. 5A, the file 'VR_MANAGER.IFO' file previously defined by the user. Is changed to '1234.IFO', the VDR system 3 guides and displays a warning message indicating that a data recording error or a playback error may occur after recording, as shown in FIG. 5B (S15). ), So that the user who requested the data record can confirm it.

Accordingly, the user can cancel the data recording operation requested by the user to prevent the data recording error or the playback error after the recording in advance. Thus, after the user confirms the guide message, the data recording is performed. In the case of canceling the request (S16), the recording operation of the previously requested input data is canceled, whereas in the case of re-input of the recording request from the user even after displaying the guidance message (S17), as described above, the VDR system ( The directory name of the file '1234.IFO', which is arbitrarily changed so that it cannot be recognized in 3), is changed to an arbitrary file directory name that can be distinguished from the file directory name normally recorded on the rewritable optical recording medium.

For example, as shown in FIG. 6, the directory name of the file '1234.IFO' is changed to 'DVD_RTAV1', which is an arbitrary file directory name that can be distinguished from a directory of a normal file to be created later. (S18).

Thereafter, in the VDR system 3, a normal file directory distinguished from 'DVD_RTAV1', which is arbitrarily changed, that is, 'DVD_RTAV', which is a normal real-time data file directory which is previously regulated so as to be recognized by the VDR system 3, and its file directory. After generating the 'VR_MANAGER.IFO' file below, a data recording operation for recording and managing the input data stream is performed (S19). Accordingly, it is possible to prevent data recording errors and playback errors due to changes in the file name or file directory of the real-time data file in advance.

On the other hand, in the VDR system 3 as described above, in addition to the case where the user changed the pre-provisioned 'VR_MANAGER.IFO' file to '1234.IFO', for example, a file directory previously stored on the rewritable recording medium. Among the pre-qualified real-time data file directory 'DVD-RTAV' is not checked or checked, or under the real-time data file directory 'DVD-RTAV', the pre-regulated management information file 'VR_MANAGER.IFO' If it does not exist, as described above, a warning message indicating that a data recording error or a playback error may occur after recording may be displayed to guide the user who requested the data recording to be able to confirm it, and then generate the message. Changes to an arbitrary file directory name that can be distinguished from a normal file directory, then pre-qualifies the normal real-time data file directory and its file. After generating the management information file under the directory, and performs a data recording operation for recording the management data stream that is input.

In addition, when the recording information of the real-time data files recorded in the management information file 'VR_MANAGER.IFO' and the real-time data file actually recorded do not match, for example, to identify the recording of the video data file. Recording information of the moving image data file recorded in the management information, recording information of the still image data file included in the management information, and audio data file additionally recorded to identify whether the still image data file is recorded. When the identification values set in the additional audio data file recording presence information recorded and included in the management information are '1', '1', and '1', respectively, ie, on the management information file, to identify the presence or absence of the recording; All files, still image data files, and additional audio data files are recorded. In the case where any one of the moving picture data file, the still picture data file, and the additional audio data file is not recorded, the VDR system 3 may generate a data recording error or a playback error after recording, as described above. A warning message is displayed to inform the user that the user who requested the data recording can check it, change it to an arbitrary file directory name that can be distinguished from the normal file directory to be created, and then After the management information file is generated under the normal real-time data file directory and the file directory, the data recording operation for recording and managing the input data stream is performed.

Meanwhile, as described above, after the user arbitrarily changes the file name or file directory of the real-time data file recorded on the rewritable optical recording medium on the operating system (OS) of the personal computer, the file name or file directory is arbitrarily changed as described above. When the data reproducing operation is requested while the rewritable optical recording medium is inserted into the optical disk device, the VDR system 3 searches for the file name and file directory of the real-time data file recorded and stored on the rewritable optical recording medium. Thereafter, it is determined whether the file name or file directory of the searched real-time data file matches the normal real-time data file name and file directory that are pre-qualified so as to be recognized by the VDR system 3, and the searched real-time data file name Pre-qualified filenames If it does not match, for example, when the 'VR_MANAGER.IFO' file is changed to the '1234.IFO' file, the requested data reproducing operation cannot be performed normally. In this case, as shown in FIG. At this time, 'VR_MANAGER.IFO' does not exist, and it displays a guide message indicating that normal data reproduction is not possible so that the user can easily identify the cause of the inability to reproduce.

As mentioned above, preferred embodiments of the present invention are disclosed for the purpose 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.

In the file management method of the recording digital stream according to the present invention, the file name or file directory of the real-time data file recorded on the rewritable optical recording medium is arbitrarily changed through a personal computer, or the like, resulting in data recording error or In addition to displaying a message warning and guiding the occurrence of a playback error, randomly changing the file directory name, and then creating a normal real-time data file and file directory so that a subsequent input data stream can be recorded and played back normally. Therefore, it is a very useful invention that can prevent the occurrence of data recording error and playback error due to the change of the file name or file directory of the real-time data file.

Claims (8)

In data recording of a rewritable optical recording medium, Determining whether a file or a file directory previously stored in the optical recording medium is normal when a data recording request is made; If the determination result is abnormal, changing the file directory name to another file directory name; And And generating a normal file directory and a file distinguished from the changed file directory name, and then recording the input data. The method of claim 1, In the step 1, it is determined whether or not the file or file directory is normal according to whether the file or file directory matches a predetermined real-time data file or file directory. The method of claim 1, In the step 1, the file management method of the recorded digital stream of the file directory pre-stored in the optical recording medium is determined to be abnormal, if the predefined real-time data file directory is not checked. The method of claim 1, In the step 1, if the management information file for the real-time data files pre-stored in the optical recording medium is not found, the file management method of the recorded digital stream is determined to be abnormal. The method of claim 1, In the step 1, when there is a mismatch between the recording information of the real-time data files recorded on the management information file for the real-time data files pre-stored in the optical recording medium and the real-time data file recorded, the abnormality is determined as abnormal. And a file management method of a recording digital stream. The method of claim 1, And the changed file directory name is a new file directory name which does not overlap with the file directory name recorded on the optical recording medium. The method of claim 1, And the generated file directory and file are a predefined real-time data file directory and file. The method of claim 1, The second step, A lower first step of outputting a guide message warning a generation of a recording error when the determination result is abnormal; And And a second step of changing the file directory name to another file directory name when data recording is requested again after outputting the guide message.