KR100654023B1 - File management method for recorded digital data stream - Google Patents

Abstract

The present invention relates to a file management method of a recording digital stream, comprising the steps of: recording and storing a data stream on a disc recording medium; And two steps of generating reproduction management information for the data stream and recording it as a single file with the data stream to be accessed together with the recorded and stored data stream, the real-time rewritable DVD (RTRW DVD); By recording and managing data stream files and management information files recorded and stored on the same disk recording medium into a single, simplified data file structure, the file names of data files on a personal computer (PC) connected through a digital interface or When changing the directory, it is possible to fundamentally prevent the recognition and search error of the resulting data file, which is a very useful invention to allow normal data read and play operations to be performed.

Data stream file, management information file, real time data, one file structure, data linkage information

Description

File management method for recorded digital data stream             

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

2 shows a data file structure of an RTRW DVD,

3 shows a data file structure of an RTRW DVD according to the present invention;

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

5 is a flowchart of a reproduction operation by 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

The present invention relates to a file management method of a recording digital stream for recording and managing various types of data files recorded on a disc recording medium such as a real-time rewritable digital versatile disc (RTRW DVD).

First, FIG. 1 shows a partial configuration of an optical disc device such as a video disc recorder (VDR) for recording or playing a signal on a disc recording medium such as a real-time rewritable DVD. The apparatus includes: an optical pickup (2) for reading out a signal recorded on a disc recording medium such as RTRW 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 file management method will be described in detail below with reference to the accompanying drawings.

First, various types of data files are recorded and managed in a disc recording medium such as the RTRW DVD 1, and the data file includes a data stream file and an information file for managing the information file. And store the video data, the audio data, and the text data, which are large amounts of real-time data, in the data stream file, and the video data and the audio data in the management information file. And management information for character data is recorded and managed.

On the other hand, in 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, each of the plurality of title set directories is provided under one root directory, and then each is again. A file structure is used to record and manage files having 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 where video management information is recorded and stored, 'VTS_01_0.IFO' file where information about the first video title set is stored, and 'VTS_01_1' where the first video record set is recorded. 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.

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. And to read files having various types of extensions recorded in the searched video title set directory, wherein the management information file and the video data file required for playing the first video title set requested for playback are read out and played back. As a result, the video data corresponding to the first video title set requested by the user is reproduced and output in real time.

Meanwhile, the data files recorded and stored on the RTRW DVD 1 as described above may be transferred to a personal computer (PC) connected and connected through a digital interface, and the data file name (File Name) is changed by the personal computer. Or, the directory where the data file is recorded and managed can be changed and deleted.

However, data files recorded and managed on a disc recording medium such as the RTRW DVD 1 are recorded and managed by a plurality of files having various extensions in each title set directory set under one root directory. Therefore, as described above, when the file name is changed by the personal computer or the directory where the data file is recorded and managed is changed and deleted, in the VDR system 3 of the optical disk device, the data file or directory whose file name has been changed is changed. There is a problem that the deleted data file cannot be recognized and searched, and thus the data file cannot be read and reproduced normally.

Accordingly, the present invention was created to solve the above problems, and records and manages data stream files and management information files recorded on a disk recording medium such as RTRW DVD by integrating them into one simplified data file structure. Accordingly, an object of the present invention is to provide a file management method of a recording digital stream which can prevent a recognition and search error of a data file due to a file name or directory change.

A file management method of a recording digital stream according to the present invention for achieving the above object comprises the steps of recording and storing a data stream on a disk recording medium; And two steps of generating reproduction management information for the data stream and recording it as a single file with the data stream to be accessed together with the recorded and stored data stream.

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. 3 shows a data file structure which is recorded and managed by the file management method of a recording digital stream according to the present invention, wherein the data file has a file name having a predetermined extension, for example, 'AAA.RTR 'AAA.RTR' file, as shown in FIG. 3, contains a large amount of video data from the first sector to the M-1 th sector, as shown in FIG. In real-time data (RT Data) is recorded and stored, management information data (IFO Data), which is navigation data, is recorded and stored from the M th sector (M Sector) to the (M + a0) -1 th sector. Audio data is recorded and stored from the + a0th sector to the (M + a1) -1st sector, and from the M + a1th sector to the (M + a2) -1st sector, text data Is recorded and stored from the M + a2th sector (M + a3)- Backup data (BUP Data) is recorded and stored up to one sector.

Meanwhile, from the M + a3 sector to the last sector of the file, various pieces of information about the data, that is, identification information (ID) of the data file, maximum bit rate of data, and encoding information of video data ( MPEG-2) and encoding information (AC3) of audio data, and data linker (Data Pointer) which records and manages start position and size information for each data are recorded and managed.

A method of integrally recording video, audio, text, management information data, and data linkage information on the data with a specific file name, namely, 'AAA.RTR' will be described in detail as follows.

First, FIG. 4 shows an operation flowchart of a file management method of a recording digital stream according to the present invention. In the VDR system 3 of the optical disc apparatus described above with reference to FIG. When requested, according to the requested recording command, the operation mode of the optical disc device is set to the recording mode. For example, the requested recording command continuously stores the received real-time video data in the 'AAA.RTR' file. In the case of a recording command requesting recording, the operation mode of the optical disk device is set to the continuous recording mode (S10), and a file requested from the user, that is, an 'AAA.RTR' file entry (Entry) and an extension of the file. (Extension) is searched and confirmed (S11).

Thereafter, the last sector of the identified file is searched, and various kinds of information on the corresponding file, that is, various kinds of information stored in the data pointer are read and stored in the internal memory (not shown) of the VDR system 3. It is made (S12). Then, the first sector of the file is searched and read (S13). As described above with reference to FIG. 3, the first sector is recorded with real-time data (RT data) as video data. The last position of the data can be searched (S14).

On the other hand, by using the data linker (Data Pointer) stored in the internal memory of the VDR system (3), it performs a continuous recording operation to record the received data stream to be continuous with the last recording position of the real-time data (S15) ).

Thereafter, when a recording end command is received from the user (S16), after stopping the continuous recording operation, in order to manage real-time data additionally recorded by the continuous recording operation, navigation data IFO data and backup data BUP. Data and Data Pointer are updated and stored to correspond to the continuously recorded real-time data (S17), and the file entry for the 'AAA.RTR' file is changed and corrected (S18). When the user requests to play the 'AAA.RTR' file in which the real-time data is continuously recorded, the data play operation is normally performed. The operation will be described as follows.

First, Fig. 5 shows an operation flowchart of a file management method of a recording digital stream, in particular, a playback operation according to the present invention. In the VDR system 3 of the optical disc apparatus, when a playback command is requested from a user, According to the requested playback command, the operation mode of the optical disc device is set to the playback mode. For example, the requested playback command may be a specific file in which real-time data is continuously recorded as described above with reference to FIG. In the case of the playback command requesting to read and play the 'AAA.RTR' file, the operation mode of the optical disk device is set to the playback mode (S30), and the 'AAA.RTR' file entry (Entry) designated by the user and The extension of the data recorded in the file is searched and checked (S31).

Thereafter, the last position of the identified file, that is, the position of the last sector is searched (S32). When the last sector is searched by the operation (S33), data linkage information stored in the last sector searched ( The recording start position of the management information data (IFO Data), which is the navigation data, is searched and checked (S34), and the management information data is searched and read (S35).

That is, after reading the management information data and confirming the management information for the real-time data or audio data and the text data which are the video data to be played back later, the respective video data, the audio data and the text data are based on the identified management information. By reading and reproducing the data (S36), the video data, the audio data, and the text data are normally reproduced until the reproduction termination is requested (S37).

For reference, the data linker (Data Pointer) recorded and stored in the last sector of the data file records and stores the recording position in the head sector of the data file, if necessary, and performs the head sector during the recording operation and the reproducing operation. It is also possible to search and read the data linkage information stored in the recording and reproducing operation, as described above with reference to FIGS. 4 and 5.

In the file management method of a recording digital stream according to the present invention as described above, a data stream file and a management information file recorded on a disc recording medium such as RTRW DVD are integrated and recorded and managed in one simplified data file structure. Thus, when a file name or directory of a data file is changed in a personal computer (PC) connected and connected through a digital interface, it is possible to fundamentally prevent a recognition and search error caused by the data file. It is a very useful invention to be carried out.

Claims (3)

A step of recording and storing the data stream on the disc recording medium; And Generating a reproduction management information for the data stream and recording it as a single file with the data stream to be accessed with the recorded data stream, And the reproduction management information comprises auxiliary information required for reproduction of the recorded data stream and data position information in a single file. The method of claim 1, And the file has a designated extension linked to a specific application program. delete

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