KR100565115B1 - Method of creating caption-based search information and repeating a section using the created search information, and an apparatus using the method - Google Patents

Abstract

The present invention relates to a method for searching and repeating playback of moving pictures recorded on a disc recording medium such as a DVD (DVD) based on subtitle information that is output together, and a reproducing apparatus using the same. The video stream repetitive playback method may include: searching for a disc recording medium and generating and storing subtitle-oriented search information linking subtitle information and information about a location of video data; Step 2 to display on the screen; Searching for a section of the video data linked to the selected caption information in the displayed caption information using the stored caption-oriented search information; And four steps of repeatedly playing the searched section, and thus, the video can be repeatedly viewed based on the subtitle information, which is a very useful invention for language learning.

Subtitle information, movie disc, screen overlay, subtitle orientation, subtitle information display window, repeat

Description

Method of creating caption-based search information and repeating a section using the created search information, and an apparatus using the method}

1 shows a configuration of a sector area of a DVD,

2 shows information and data of a volume structure;

3 shows information and data of a file structure,

4 shows a hierarchical structure of a recording aggregate (VOB),

5 illustrates a configuration of a unit sector of presentation data.

6 illustrates a configuration of a unit sector of navigation data.

7 and 8 illustrate navigation information and data,

9 is a block diagram of a subtitle-oriented playback apparatus of a moving picture recording medium according to the present invention;

10 and 11 illustrate an operation flowchart of a method of searching a moving picture recording medium according to the present invention, in particular, a method of generating subtitle-oriented search information of a video stream;

12A and 12B illustrate subtitle-oriented search information of a table structure according to the present invention;

FIG. 13 shows another configuration of a caption-oriented playback apparatus of a moving picture recording medium according to the present invention.

14 illustrates a caption information display window according to the present invention;

15 is a flowchart illustrating a method of searching a moving picture recording medium according to the present invention, in particular, a method of searching and repeating a moving picture stream oriented in subtitles.

※ Explanation of code for main part of drawing

1: Optical disc 2: Optical pickup (P / U)

3: RF demodulator 4: Digital signal processor (DSP)

5,25: A / V signal processor 6, 26: synthesizer

7: Servo unit 8: Synchronization detector

9,29: overlay unit 10: driver

11, 11 ': Micom 12,22: Memory

13: Sled Motor 14: Spindle Motor

21: CPU 30: video card

40: hard disk 100: interface

201: optical disk driver 202: personal computer

The present invention generates linkage information with video from subtitle information data recorded on a video disc recording medium such as a digital versatile disc (DVD), and records video data using the linkage information according to selection of the subtitle information data. The present invention relates to a method for generating and searching subtitle-oriented search information for searching and repeatedly playing a position, and a playback apparatus using the same.

In general, a caption image display function is a reproducing apparatus for reproducing and outputting video and audio signals recorded on a recording medium, for example, a VCR (Video Recorder) for reproducing a video tape on which video and audio signals are recorded. As one of the main functions used to improve the efficiency of language learning, etc., a separate caption video signal is additionally recorded on the video tape, and when the video tape is played back, the additionally recorded caption video signal is recorded. By selectively reproducing according to the selection and displaying the caption video reproduced and output by the caption video signal superimposed with the general video signal, the user watching the video tape can watch the caption video simultaneously with the video screen and the audio output. Thus, more efficient language learning is achieved.

On the other hand, a disc recording medium for recording and storing moving image data as a digital data stream, for example, recently developed DVD, particularly DVD-ROM, is a high-capacity, high-density disc of about 4.7 GB. A program, i.e., a large amount of video and audio data corresponding to a plurality of titles, as well as various subpicture data are recorded and stored, and the sub-picture data recorded on the DVD includes the video. And caption images corresponding to the audio data are recorded and stored as bitmap image data.

Accordingly, the caption video display function is reproduced without additional recording of caption video signals or data by reproducing the caption video of the sub-picture data recorded as the image data so that the caption video is superimposed with the main video screen by video data playback. Can be easily implemented.

However, when a user wants to play back and view a specific caption video recorded on a disk recording medium such as a DVD, the user can use the search function provided in the disk player to record the caption video. After manually searching the position, the playback operation must be resumed. The search operation is performed by a user-specified time or a playback position forward and backward movement key. In order to search for a desired recording position of a specific subtitle image, The user must pay attention to the search video displayed at high speed by the search operation, and the search operation must be stopped manually when the desired caption video is displayed. Is required, as well as inconvenience in use, quick and accurate search operation is not made The problem was that.

Accordingly, the present invention was created to solve the above problems, and includes a caption information data recorded on a disc recording medium such as a DVD, and a recording position of video data associated with the caption information data and an output time point. The present invention provides a method and apparatus for generating subtitle-oriented search information of a video stream that are generated as subtitle-oriented search information by interconnecting information about the present invention.

Another object of the present invention is to provide a method and apparatus for repeatedly playing an image section based on a selected subtitle using the generated subtitle-oriented search information.

In accordance with an aspect of the present invention, there is provided a method of generating and repeating subtitle-directed search information of a video stream, the method comprising: searching for subtitle information in a disc recording medium in which video, audio, and subtitles are interleaved and recorded; Checking a recording position of moving image data associated with an output time point of the retrieved subtitle information; Generating and storing a subtitle-oriented search information table in which the retrieved subtitle information and the information about a recording position of the identified moving image data are interrelated with each other; Receiving a repetition request of a user during video playback; And retrieving and outputting a video stream from the stored subtitle-directed search information table to the display section of the repetition request time point, and repeatedly outputting the video stream from the start position to the end position where the subtitle is displayed. It is done.

The above-described method for generating and repeating subtitle-directed search information according to the present invention, and a reproducing apparatus using the same, include subtitle information data stored on a disc recording medium such as DVD, and the subtitle information data. The information about the recording position of the recorded video data is interconnected to generate and store the subtitle-oriented search information, and the subtitle information data is displayed on the screen through the subtitle information display window so that the user can select the desired subtitle information. Afterwards, the recording section of the video data linked to the caption information selected by the user is searched using the caption-oriented search information, and the section is repeatedly played, thereby selecting and repeating the video data section based on the caption information. Will be.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, prior to the detailed description of the method for generating and searching subtitle-oriented search information according to the present invention, and the playback apparatus using the same, the configuration of a DVD, particularly a DVD-ROM, which is a moving picture recording medium, and the following. The recording data, information and the like will be briefly described as follows.

First, FIG. 1 illustrates a configuration of a sector area of a DVD, and a disk configuration, that is, a volume, of the DVD is physically accessed by the DVD player when a disk is inserted. It is divided into a physical sector area (PSA) which is a recording area and a logical sector area (LSA) which is a recording area which can be accessed by an external device by a user's selection. The starting position LSN of 0 is spaced apart in the circumferential direction by the start position PSN start of the physical sector area and a predetermined distance (LSN 0 = PSN 0x30000).

On the other hand, the data structure of the DVD (DVD) consisting of the physical / logical sector area as described above is largely divided into a volume structure (File structure), a file structure (File Structure) and a file data structure (Video Object Structure). Referring to the data and information recorded and stored in the volume structure, as shown in FIG. 2, in the logical sector area LSA, in particular, in the recording positions corresponding to logical sector numbers 0 to 256, Volume Recognition Seq .; Main Volume Descriptor Seq. And Reserve Volume Descriptor Seq., Which records volume ID and time information (Date, Time), Logical Volume Integrity Address, and so on. ), And a file set descriptor (FileN) in which information on the names, start positions, sizes, etc. of all files are recorded in a recording position corresponding to a logical block number (LBN) 0 to (q-1). Set Descriptor, File Identifier Descriptor and File Entry are recorded.

The data and information recorded in the file structure are stored in the video title set (Video_TS) directory as shown in FIG. 3, and video management information (VMGI: Video Manager Information) and video management. Record sets (VIDEO_TS.VOB) for menus, respective video title set information (VTS_01.0IFO, VTS_02.0IFO ..) and record sets (VTS_01_1.VOB, VTS_01_2) for a plurality of titles recorded on DVD (DVD). .VOB ...)

Meanwhile, referring to FIGS. 4, 5, and 6 with reference to FIGS. 4, 5, and 6, data and information recorded and stored in the file object structure (Video Object Structure) will be described with reference to FIG. 4 in a video object set (VOBS). FIG. 4 shows a hierarchical structure, wherein the recording assembly VOB is a recording unit for data streams recorded with temporal continuity, and the one recording assembly VOB is shown in FIG. It contains a plurality of reproduction order information (Cell) for managing the reproduction order, the reproduction order information (Cell), a plurality of recording units (VOBU :) having a recording size corresponding to the video data of about 0.4 to 1 second Video Object Units (VOBs), and the recording unit (VOBU) is a single navigation data for controlling a DVD and a presentation for playing video and audio. and audio, video, and sub picture data are recorded in the presentation data, and the navigation data, audio, video, and sub picture data are each sector or pack having a recording size of 2048 bytes. As sub-pack data, the sub-picture data may or may not be recorded in one recording unit VOBU.

FIG. 5 illustrates a configuration of a unit sector of the presentation data, and illustrates a configuration of a unit sector of audio, video, or sub-picture data as described above with reference to FIG. 4. Alternatively, the sub-picture data, that is, the 2048-byte presentation data may include: a pack header in which a start code, system clock reference (SCR) and mux rate information are recorded; A Paketized Elementary Stream (PES) header in which start code information about the audio, video or sub-picture data is recorded; A Substream ID (Substr. ID) in which information about a language and the like are recorded; And a data area in which the audio, video or sub-picture data is recorded.

For reference, the PES refers to a packetized elementary stream, and the packetized elementary stream is a 14-pack header of a 2048-byte data stream, as shown in FIG. 5. Remaining data streams except for are types of data streams common between various types of data streams.

6 illustrates a configuration of a unit sector of navigation data, and illustrates a configuration of a unit sector of navigation data, which has been described above with reference to FIG. 4. A Pack header; A System header in which system information is recorded; Presentation control information (PCI) for the presentation data; Data Search Information (DSI) for data search.

Meanwhile, navigation information is recorded together as information for reproduction control of the recorded moving picture data, and two types of information and data exist in the navigation information. That is, video management information (VMGI), video title set information (VTSI), program chain information (PGCI), which are navigation information in the form of file shown in FIG. Playback control information (PCI), data search information (DSI), and the like, which are navigation information in the form of Pack data in the VOB stream shown in Fig. 8, are recorded.

Hereinafter, a preferred embodiment of a caption-oriented search information generation and search method according to the present invention and a playback apparatus using the same will be described in detail with reference to the accompanying drawings.

Fig. 9 shows an overall configuration of a subtitle-oriented playback apparatus of a moving picture recording medium according to the present invention, comprising: an optical disc 1 which is a moving picture recording medium such as a DVD; An optical pickup (2) for reading recording data of the optical disc; An RF demodulator (3) for demodulating the read signal into an RF signal; A digital signal processor (4) for digitally processing the demodulated RF output; An A / V signal processor (5) which processes the signal-processed digital signal into an audio and video signal and outputs the signal to an external device; A servo unit (7) for controlling a server (Servo) operation according to a focus error (FE) signal and a tracking error (TE) signal output from the optical pickup (2); A spindle motor 14 which drives the optical disc 1 in rotation in accordance with the control signal of the servo unit 7; A sled motor 13 which horizontally moves the position of the optical pickup 2 according to the control signal of the servo unit 7; A synchronization detector (8) for detecting a synchronization signal among the RF signals output from the RF demodulator (3) and outputting the synchronization signal to the servo unit and the digital signal processing unit; A microcomputer 11 for controlling operations of the digital signal processor and the servo unit according to an external selection key input; A memory (12) for storing data necessary for the control operation of the microcomputer and subtitle information data of the optical disc; A screen overlay unit (9) for superimposing and outputting subtitle information data on a sub-picture screen, for example, on a subtitle information display window screen according to the microcomputer control signal; And a synthesizer 6 which superimposes the caption image of the screen overlapping unit with the main video signal output from the A / V signal processing unit.

The operation description of the caption-oriented playback apparatus of the video recording medium according to the present invention configured as described above, in particular, the operation of generating caption-oriented search information of the video data stream will be described with reference to FIGS. 10 and 11. When the optical disc 1, which is a disc recording medium such as a DVD, is inserted and seated in the playback device, the microcomputer 11 controls the operation of the servo unit 7 to rotate the optical disc 1 at a constant speed, and the optical disc In (1), a volume structure search mode for searching for data and information recorded and stored in the volume structure is set (S10).

Thereafter, in order to retrieve data and information recorded in the volume structure (S11), first, the position of the optical pickup 2 is moved to a recording position corresponding to the logical sector number (LSN) 256, and the first shown in FIG. Check the Main Volume Descriptor Sequence Address recorded in the record field of the 1st Anchor Point, read the Main Volume Descriptor Seq. Check the Logical Volume Integrity Address recorded in the specific record field.

Thereafter, the logical volume integrity sequence of which the address is confirmed is read, the file set descriptor address recorded in a specific recording field is checked and stored (S12, S13), and The information recorded in the confirmed File Set Descriptor is read (S14). As described above with reference to FIG. 3, the file set descriptor in which the information and data of the file structure is recorded and stored is connected. All information such as file name, start and size is recorded for files with structure.

Thus, data and information read from the File Set Descriptor, for example, all recorded File Name, Logical Sector Number Start (LSN), Record Size (Size) and Start Address again. The number of video title sets VTS recorded by the file information of FIG. 3 stored in the memory 12, and then the start / end address of each of the video title sets VTS are stored in the memory 12 (S15). In operation S16, data and information on the number of sub-pictures of the partial title, the sub-stream identifier, and the language are stored.

Subsequently, the microcomputer 11 sets a sub-picture search table generation mode corresponding to the subtitle-directed search information and records the caption-oriented search information of the table structure shown in FIG. 12, that is, the video data associated with the subtitle video. When the subtitle-oriented search information of the table structure is generated (S18), the set sub-image search table generation mode ends.

As described above, when the optical disc is seated and inserted into the playback device, the volume structure, file structure, and navigation data and information of the optical disc are read and stored, and the subtitle-oriented search information of the table structure is generated using the stored information. As shown in FIG. 11, when the sub-picture search table generation mode is set (S30), as shown in FIG. 11, information of the corresponding file set descriptor stored in the memory 12 is stored. In the video title set information (VTS_0X_0.IFO), i.e., the number of files of the video title set is checked from 'X', and the start position and the size information of the video title set are also checked. A title set table (VTS Table) is created (S31).

Also, the first video title set information (VTS_01_0.IFO) of the video title set information of FIG. 3 confirms the starting position, the number of subtitle data and the number of sub-picture data of each subtitle PTT. A subtitle table (PTT Table) shown in 12a is created (S32), and since the sub-picture data may be recorded for each different language, the sub-picture data including information on the language. A table (Subpicture Table) and a subpicture search table are created (S33).

The sub-picture data table is first composed of the video title set record set (VTS_01_M.VOB, M = 0,1,2) corresponding to the video title set information, for example, the first video title set information (VTS_01_0.IFO). When the sub-picture data is recorded, the recording position information of each sub-picture data is read. In the case of each sub-picture data, the first byte of the pack data is a sub stream identifier (Sub_ Stream_ID) 0x20 to 0x3F. Since it is recorded as the sub-picture, the search position (S34) is used to record the recording position information of each sub-picture data, that is, the start position LBN of the navigation pack data corresponding to the start position of the recording unit VOBU in which the sub-picture data is recorded. Store in conjunction with data. As shown in Fig. 12A, a serial number indicating the order of each sub-picture picture entry is also recorded in the sub-picture search table.

Also, header information of the sub-picture data pack is analyzed to determine a start time and an end time of the sub-picture picture, and are recorded in the corresponding sub-picture picture entry.

Instead of generating a subtitle-oriented search information table having a hierarchical structure starting with a video title set as shown in FIG. 12A, as shown in FIG. 12B, each subpicture entry is replaced with a subpicture data pointer (* Text) and a subpicture entry. A serial number indicating the sequence of, the start time and end time, the number of the cell containing the subpicture picture, the number of the program chain containing the playback control information of the subpicture picture, and the video title including the subpicture picture. It can also be configured to include the number of sets. In this structure, each subpicture entry is linked by a chain address (* Next, * Prev).

In the table structure of FIG. 12A or 12B, a sub-picture picture is converted into text rather than an image and stored in a corresponding field. For this purpose, a sub-picture data recorded as image data in a bitmap form, that is, a character of a subtitle picture is stored. The character conversion algorithm converts the character data into character data (S34). The character conversion algorithm is a pattern recognition method used in a conventional optical character recognition (OCR), for example, an artificial neural network (ANN). Artificial Neural Network) may be used.

In the character conversion algorithm using the artificial neural network (ANN), it is divided into a learning phase and a recognition phase to recognize the characters. At the first learning phase, a character set that is a variety of samples is prepared, and the character set is black and white After the bitmap is formed, the black and white bitmap is classified into each character group by a self organizing map (SOM). In this sorting operation, letters of the same pattern are separated into the same group for each letter, and at this time, a learning step of linking each of the separated groups with the corresponding letter code is performed.

The learned groups are set as weights and used in the actual character recognition step.

In the recognizing step, each character is separated from the sub-picture data of the bitmap image, that is, the caption image, the separated characters are made into a black and white bitmap, and classified based on the weight. Since the character recognition is possible, the caption image of the sub-picture data is converted into the character data by the above operation, and the dictionary meaning of the necessary words when selecting the character data displayed on the screen, that is, the character string is displayed on a separate screen. You can also output .

Subsequently, when partial title information retrieval for all video title sets VTS is completed (S35, S36, S37), the caption-oriented search information generation operation having the table structure as shown in FIG. 12A or 12B is terminated.

For reference, the above-described character conversion operation may be omitted, and the image data corresponding to the caption image may be directly included as a table entry of FIG. 12A or 12B to selectively display the stored image data.

On the other hand, Figure 13 shows another embodiment of the caption-oriented playback device of the video recording medium according to the present invention, in particular, in a personal computer (PC), the caption-oriented playback device of the video recording medium using an optical disk driver mounted An embodiment of an optical disk driver 201 and a personal computer 202 connected and connected by using a digital interface is shown. The optical disk driver is the same as that in the configuration of the embodiment of FIG. An optical pickup (2), an RF demodulator (3), a digital signal processor (4), a servo unit (7), a spindle motor (14), a sled motor (13), and a synchronization detector (8), which perform a function; A microcomputer 11 'for controlling operations of the digital signal processing unit 4 and the servo unit 7 and performing communication control with an external host; And a memory 12 storing temporary data for performing the operation control, wherein the personal computer 202 receives a digital signal transmitted through the digital interface 100 connected to the optical disc driver. A memory 22 for storing; An A / V signal processor 25 for processing the digital data read out from the memory 22 into audio and video signals; A screen overlay unit (29) for converting caption information data read out from the memory (22) into data superimposed on a caption information display window; A synthesizer 26 for superposing the output data of the screen overlapping unit 29 and the main image data output from the A / V signal processing unit 25; A video card 30 for outputting the video data superimposed with the caption video as a screen video signal; A central processing unit (CPU) 21 for controlling the operation of the screen overlapping unit 29 and the constituent means in accordance with a user's key input selected through a keyboard 23 or a mouse by executing a program; And a hard disk 40 for storing a program necessary for the operation of the CPU.

The operation of the caption oriented reproducing apparatus of the moving picture recording medium, which is another embodiment of the present invention, constituted as described above, is performed as described with reference to FIGS. 10, 11, and 12, and the microcomputer 11 of the optical disc driver. ') Controls the reproducing operation of the digital signal processing unit 4 and the servo unit 7 according to a control command of an external host, and thus the reproduced digital data is stored in the memory unit through the digital interface 100. 22), the stored data are sequentially input to the A / V signal processor 25 and decoded into video and audio data.

The control and reception of the optical disk driver 201 and the data for the operation, that is, the reception and storage through the digital interface 100, the application to the A / v signal processor 25, etc., the hard disk The playback program recorded on the 40 is loaded into the memory 22 and executed by the central processing unit 21, thereby.

On the other hand, the caption-oriented search information generated and recorded as described above is stored as a separate file corresponding to the corresponding optical disk by using the volume ID described above with reference to FIG. When the optical disc on which the subtitle-directed search information has already been generated and recorded is inserted and mounted again, the above-described operation is performed so as not to generate the subtitle-oriented search information repeatedly through the above operation. And verifying the volume identifier of the optical disc through information retrieval, and if there is a previously stored individual file corresponding to the identified volume identifier, that is, subtitle-oriented search information, the subtitle-oriented search information is not generated. A search operation using a subtitle-oriented search information as a file is performed.

In this way, by generating search information in a table structure in which subtitle information data for each video title set and recording position information of the video data associated with it are generated, according to the user's selection of the subtitle information data, the video associated with the subtitle information. The recording position of the data, that is, the recording position of the recording unit VOBU, can be searched and reproduced.

FIG. 14 illustrates a caption information display window according to the present invention, wherein the caption information display window is displayed as a superimposed screen on one side or the entire screen of a video display device such as a monitor, and the desired caption information is confirmed by a user's selection. Allow scrolling.

Accordingly, the user can select a specific text column displayed on the caption information display window to search and play the video screen associated with the selected character string. The recording position search operation will be described in detail with reference to FIG.

First, FIG. 15 is a flowchart illustrating a method for searching a video recording medium according to the present invention, in particular, a method for searching and repeating a video stream for subtitles, and selecting and inputting a desired video title set (VTS) (S50). ), The selected input video title set information (VTS_ON_0.IFO) file is read (S51), and the start / end address of the corresponding specific video title set, the property of the video / audio / sub-picture data, and the partial title (PTT) Upon reading and confirming the information and the like, the playback (S52) is started from the file of the file data (VTS_0N_0.VOB) corresponding thereto, and the microcomputer 11 is converted into a character by a character recognition algorithm and is stored in the memory 12. Among the subtitle information of the stored sub-picture data, the character string data of the predetermined front and rear sections of the video screen currently being reproduced is output to the screen overlapping unit 9 so that the synthesizer 6 is synthesized with the video screen. As such, such that, the caption information display screen is displayed (S53) as shown in Fig. At this time, the serial number of each subtitle is also displayed on the display window.

Then, when the user selects any one specific character string among the characters displayed on the subtitle information display window and then inputs a 'move key' (S54) or double-clicks the specific character string, the search information associated with the specific character string, that is, the program chain number, The cell number, the video title set number, and the relative recording position LBN of the corresponding recording unit VOBU are read and checked (S55) to perform a search jump operation to the recording position of the recording unit VOBU. At this time, the indication value of each pointer (P ₁ x, P ₂ x, P ₃ x) of FIG. 12A or the indication value of the pointer Ptr of FIG. 12B, corresponding to the image being played, is also updated according to the moved position. .

After the operation, in the searched recording unit VOBU, a PES packet having a representation time (PTS) closest to the representation time (start time) of the selected sub-picture picture is searched to perform a decoding operation thereof (S56). In this case, video data associated with the text data selected by the user through the caption information display window is played.

Meanwhile, when the subtitle information display window is scrolled and the partial title PTT associated with the string data is changed, the pointers P ₂ x and P ₃ x in FIG. 12A are indicated by another table adjacent to the current table. The value, i.e., the indication position, is changed so that the content of the subtitle corresponding to the indication position is displayed on the screen.

If one character string or two strings (start and end sections) are selected in the caption information display window of FIG. 14, and a 'repeat key' is input, the video section in which the data of the selected string is displayed is repeatedly played.

First, when one string is selected and a 'repeat key' is input (S60), referring to the subtitle-oriented search information table of FIG. 12A or 12B, the recording including the selected string (subtitle) is performed in the same manner as described above. The video data position to be displayed together with the selected character string is found in the unit and reproduced therefrom (S61). Then, it is checked whether or not the display end time of the selected character string has elapsed (S62). If so, the selected character string is moved back to the video data position where the selected character string is displayed and reproduced and outputted from that position (S61). Such an operation is performed until a user requests to release 'repeat play' from the user (S63). If there is a request for repeat release, the operation is performed from the current position (S64).

If two strings are selected for start and end, and a 'repeating key' is input (S70), the same method as described above finds the image data position where the preceding string is to be displayed and reproduces the output from there ( S71). If the second string of two strings selected by the sequential playback of the video / audio PES packet is displayed together with the image data, check whether the display end time of the string has elapsed (S72), and if so, the leading end of the two selected strings The character string moves back to the image data position to be displayed together and reproduces and outputs from the position (S72). Such an operation is performed until a user requests to release 'repeat play' from the user (S73). If there is a request for repeat release, the operation proceeds from the current position (S64).

Instead of selecting the character string as described above for repeat playback, the section to be repeated may be designated by selecting the serial number of the character string output on the display window. That is, when a number (or numbers) is input from the user, the subpicture entry (or entries) of the number (or numbers) is found in the subtitle-oriented search information table, and the above-described subtitle-oriented repetitive playback operation is performed. Another subtitle-oriented repeat playback method according to the present invention may be implemented differently as follows.

When the user inputs a repetition request, the relative time from the playback start time at the time of the repetition request is grasped. If the relative time is found, a subpicture entry whose start time and end time includes the identified relative time is found in the subtitle-oriented search information table of FIG. 12A or 12B.

When the entry is found, the information of the entry is referred to to find the video data position where the subtitles of the entry are to be displayed together, and to be reproduced and outputted therefrom. Perform repetitive replay operation to replay and output from the position.

If the user requests to move to the subtitle before or after the currently repeated subtitle through the subtitle information display window or by inputting the serial number of the subtitle during the repeat play operation as described above, the requested subtitle is checked, The identified subtitles are found in the subtitle-oriented search information table of FIG. 12A or 12B. If an entry of the subtitle is found, the video section displaying the subtitle is repeatedly played.

As described above, the method for generating and searching subtitle-directed search information according to the present invention, and the playback apparatus using the same, include caption information data stored in a disc recording medium such as DVD, and the subtitle information data. By interlinking the information on the recording position of the recorded video data to generate and store the subtitle-oriented search information, the subtitle information data is displayed on the screen through the subtitle information display window so that the user can select the desired subtitle information. Thereafter, the recording position of the moving picture data recorded in association with the subtitle information selected by the user can be quickly and accurately searched using the subtitle-oriented search information, and the user can repeatedly watch only the video section where the desired subtitle image is recorded. It is a useful invention.

Claims (8)

Retrieving subtitle information from a disc recording medium in which video, audio, and subtitles are interleaved and recorded; Checking a recording position of moving image data associated with an output time point of the retrieved subtitle information; Converting bitmap data into character data among the retrieved subtitle information; Recording and converting the converted text data and information on a recording position of the identified moving image data, and generating and storing a caption-oriented search information table in which serial numbers indicating the order of the retrieved caption information are recorded; Receiving a repeat request of the user during the video playback step 5; And And a sixth step of finding a subtitle having the time point of the repetition request from the stored subtitle-oriented search information table and repeatedly outputting and outputting the video stream from the start position to the end position where the subtitle is displayed. Subtitle-oriented search information generation and repeated playback method of a video stream. delete delete The method of claim 1, further comprising: 6 receiving, by the user, a request for moving to the previous subtitle or the next subtitle of the repeated section during the repeated playback; And And detecting the selected subtitle from the stored subtitle-oriented search information table according to the movement request, and repeatedly outputting and outputting the video stream from the display start position to the end position of the subtitle. How to create and repeat playback of subtitle-oriented search information. 2. A video stream according to claim 1, wherein when a user inputs a number of subtitles to be repeated during the repeating playback, a subtitle corresponding to the number is found from the stored subtitle-oriented search information table and the video stream is displayed from the start position to the end position of the subtitle. And repeatedly outputting and outputting the subtitle-oriented search information for the video stream. delete delete delete

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