KR20010081268A - 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 output a message about impossibility of reproducing or an error in reproducing through detecting a file name and a file directory of a data file. CONSTITUTION: In a mounted state of a DVD in an optical disk player, a reproducing command is received from a user. A file name and a file directory of a demanded file are checked. In case of difference in the file names, a message about impossibility of reproduction by difference in the file names is outputted. In case of difference in the file directories, a message about impossibility of reproduction by difference in the file directories is outputted. In case of identification of the file name and the file directory, the demanded file is reproduced.

Description

File management method for recorded digital data stream

According to the present invention, it is possible to inform in advance of the inability to reproduce or a reproduction error after recording due to a change in the file name or directory of a real-time data file recorded on a disc recording medium such as a rewritable DVD (DVD-RAM, DVD-RW, etc.). The present invention relates to a file management method of a recording digital stream.

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, 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 any file name desired by the user, or change the real-time data file to the desired file name. You can change the location to any directory.

However, as described above with reference to FIG. 2, the data file recorded and stored on the rewritable DVD must use a file name that is pre-qualified so as to be recognized by the VDR system of the optical disc device, and is also fixed to a specific directory. Since it must be located, if the user arbitrarily changes the file name of the real-time data file or the directory through the personal computer as described above, the VDR system cannot recognize this, and then the normal playback operation is performed. Or there was a problem that results in not being able to perform the recording operation.

Accordingly, the present invention has been created to solve the above problems, and can search or confirm whether the file name or file directory of a real-time data file recorded on a disc recording medium such as a rewritable DVD can be reproduced or not reproduced. It is an object of the present invention to provide a file management method of a recording digital stream which outputs and displays a message for guiding or warning an error occurrence.

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,

4A to 4D show a data file structure having a file name and file directory arbitrarily changed through a personal computer or the like,

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

Fig. 6 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

A file management method of a recording digital stream according to the present invention for achieving the above object comprises the steps of: searching and confirming a file name and a file directory on the optical recording medium in reproduction of a rewritable optical recording medium; And outputting a message informing that reproduction is impossible when the checked file name or file directory is different from the file name or file directory previously prescribed for the real-time data file.

In addition, the file management method of the recording digital stream according to the present invention, in the data recording of the rewritable optical recording medium, a step of retrieving and confirming the file name of the file and the directory in which the file is recorded when the file recording request; And outputting a message warning of occurrence of a reproduction error after recording when the checked file name or file directory is different from the file name or file directory previously prescribed for the real-time data file.

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, FIGS. 4A to 4B illustrate an embodiment in which a file name or a file directory of a specific file is changed among the file structures of the rewritable DVD as described above with reference to FIG. 2. FIG. 4B shows a case where the 'Video_TS.IFO' file in the video title set (Video_TS) directory is changed to an arbitrary file name not previously defined, for example, a file name of '1234.IFO', and FIG. 4B is located under the root directory. The case where the video title set (Video_TS) in the file name is changed to an arbitrary file name not previously defined, for example, a directory name of '1234', is shown.

FIG. 4C also illustrates the case where the user has changed the 'Video_TS.IFO' file in the Video Title Set (Video_TS) directory via a personal computer to any directory that is not pre-qualified, for example the root directory. 4D illustrates a case where the video title set (Video_TS) under the root directory is moved and changed under an arbitrary directory, for example, the '1234' directory. When a request for playing or recording a file changed to a file name or file directory not specified in the above is described, an operation description of a file management method of a recording digital stream that notifies or warns of a playback error after recording or a playback error is explained. As follows.

First, FIG. 5 is a flowchart illustrating a method of managing a file of a recording digital stream according to the present invention. In particular, a file name or file whose file name or file directory of a real-time data file recorded on a rewritable DVD is not previously defined. In the case of having a directory, an operation flow chart for indicating that the file cannot be reproduced and the cause thereof is shown. In the VDR system 3 described above with reference to FIG. 1, a rewritable DVD 1 is stored in an optical disk device. In the inserted seated state (S10), when a playback request is received from the user (S11), the file name and file directory of the file requested to be played back are searched and confirmed (S12).

As a result of the confirmation, when the file name of the specific file requested to be reproduced is different from the file name previously prescribed so as to be recognized by the VDR system 3 as described above with reference to FIGS. 4A to 4D (S13), the file name A guide message indicating that playback is not possible due to an error is output (S14), so that a user who requests a playback operation of the corresponding file can know the cause of the playback inability.

On the other hand, if the file directory of the specific file requested to be reproduced is different from the file directory previously prescribed to be recognized by the VDR system 3 as described above with reference to FIGS. 4A to 4D ( S15), a guide message indicating that playback is not possible due to an error of the file directory is output (S16), so that the user who requests the playback operation of the file can know the cause of the impossibility of playing.

As a result of the confirmation, the file name and file directory of the specific file requested to be reproduced match the file name and file directory previously prescribed so as to be recognized by the VDR system 3 as described above with reference to FIG. In this case, the normal reproducing operation of reproducing the corresponding file requested for reproducing is performed (S17).

Therefore, when the specific file requested by the user is not played, the user can know exactly the cause thereof.

6 is a flowchart illustrating a file management method of a recording digital stream according to the present invention, in particular, a file name that is previously prescribed so that a specific file name or file directory requested for recording from a user can be recognized by the VDR system 3. And an operation flow chart for warning the occurrence of a reproduction error after recording in the case of being different from the file directory, in which the rewritable DVD 1 is inserted and seated in the optical disk device in the VDR system 3 (S30). When a recording request is received from the user (S31), the file name and file directory of the file for which recording is requested are checked (S32).

As a result of the check, when the file name requested to be recorded is different from the file name previously prescribed so as to be recognized by the VDR system 3 (S33), or the directory of the file requested to be recorded is different from the file directory previously prescribed. In a case (S34), a warning message is output to warn that a recording error may occur due to a file name error or a file directory error (S35), so that the user who requested the recording operation may know in advance of the recording error.

On the other hand, after the warning message output, if a recording confirmation request is received from the user requesting to perform a recording operation (S36), the received data is recorded on the rewritable DVD 1 (S36), the warning message output Then, when a recording cancellation request is received by the user (S37), the requested recording operation is canceled (S37), so that a recording error can be prevented in advance due to a file name error or a file directory error that has been requested. .

In the file management method of the recorded digital stream according to the present invention, the file name or the file directory of the real-time data file recorded on the disc recording medium such as a rewritable DVD can be searched and confirmed to be impossible to reproduce or reproduce after recording. By outputting a message that notifies or warns of the occurrence of an error, when a specific file requested by the user to play is not played, the cause of the error is not only known, but also a recording error due to a file name error or a file directory error that is requested to be recorded. It is a very useful invention that can prevent the occurrence in advance.

Claims (6)

In reproduction of a rewritable optical record carrier, Step 1 of searching and confirming a file name and a file directory on the optical recording medium; And And if the checked file name or file directory is different from the file name or file directory previously prescribed for the real-time data file, the step of outputting a message informing that the reproduction is impossible. How to manage. The method of claim 1, The message management method of a recorded digital stream, characterized in that the message includes a content for explaining the cause of the reproduction impossible. The method of claim 1, Wherein said steps 1 and 2 are performed at the time of requesting reproduction of said optical recording medium. In data recording of a rewritable optical recording medium, A first step of searching for and checking a file name of the file and a directory in which the file is recorded when a file recording request is made; And And if the checked file name or file directory is different from the file name or file directory previously prescribed for the real-time data file, outputting a message warning the occurrence of a reproduction error after recording. How to manage files in a stream. The method of claim 4, wherein And after outputting the message, requesting confirmation of file recording, further comprising: performing a requested recording operation. The method of claim 4, wherein The message management method of a recording digital stream, characterized in that the message includes a content for explaining the cause of the reproduction error occurs after the recording.