KR20040064949A - Method for controlling search of electronic dictionary for optical disc reproducing apparatus - Google Patents

Abstract

PURPOSE: A method for controlling electronic dictionary retrieval of an optical disk reproduction device is provided to retrieve explanations on all words of caption sections relative to a selected reproduction time while reproducing video images, thereby reproducing the retrieved explanations on a screen. CONSTITUTION: If a user selects a desired video title set(S10), a microcomputer reads a file of the video title set information(S11). The microcomputer starts reproducing video information and audio information included in the selected file data(S12). The microcomputer decides whether an electronic dictionary retrieval function is executed(S13). If so, the microcomputer reads a caption section associated with the video and audio information(S14), and converts caption data into ASCII code data(S15). The microcomputer decides whether words having the low degree of difficulty exist in the caption section(S16). If so, the microcomputer skips the corresponding words(S17), and extracts explanation information data on all words(S18). The microcomputer reproduces the explanation information data in the second video screen area(S19), and decides whether a key for cancelling the electronic dictionary retrieval function is inputted(S20). If so, the microcomputer cancels the function and performs a normal reproduction process for the video and audio information(S21).

Description

Electronic dictionary retrieval control method of optical disc player {METHOD FOR CONTROLLING SEARCH OF ELECTRONIC DICTIONARY FOR OPTICAL DISC REPRODUCING APPARATUS}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic dictionary search control method of an optical disc reproducing apparatus, and more particularly, to an electronic dictionary retrieval control method of an optical disc reproducing apparatus for retrieving and displaying a word commentary of a foreign language subtitle recorded on an optical disc such as a DVD disc. will be.

As is well known, DVDs, which record and store moving picture data as digital data streams, in particular optical discs such as DVD-ROMs, are high-capacity, high-density discs of about 4.7 GB, and have a number of moving picture programs, that is, titles. In addition to the large-capacity video and audio data corresponding to), various subpicture data are recorded and stored. Subtitle data corresponding to the video and audio data are included in the subpicture data recorded on the DVD. Is stored as bitmap image data.

Accordingly, in the optical disc reproducing apparatus for reproducing the DVD, the caption image of the sub-picture data recorded as the image data is reproduced to be superimposed and displayed on the main video screen by reproducing the video data, thereby adding a separate caption video signal or data. Subtitle image display function can be easily implemented without recording.

On the other hand, the subtitle data of the sub-picture data stored in the DVD contains a multi-language subtitle image. Recently, when performing a foreign language study using such a multi-language subtitle image, it is possible to easily identify unknown words in the subtitle contents. In order to do so, an electronic event search function is added to the optical disc player.

In the electronic dictionary search function, when the user is playing the video image recorded on the DVD together with the associated subtitle image, the electronic dictionary search function is executed when there is an unknown word in the subtitle contents of the subtitle image. As the playback screen of the video image is stopped and the unknown word is designated and selected by the user's direction key operation, the solution setting word of the selected word is extracted from the electronic dictionary database and displayed on the screen.

However, in the electronic dictionary search function applied to such a conventional optical disc player, if an unknown word is found among words displayed in the subtitle, the electronic event search function must be performed at the moment when the subtitle containing the word is displayed. The instantaneous judgment of the needs of the elderly and the mental retardation is poor reflecting ability is difficult to use normal.

Also, even if the electronic dictionary search function is executed at the subtitle position of the unknown word at an appropriate time, the user must move and select the unknown word from the entire subtitles according to the user's repeated key input operation. There is a problem that the search operation takes a long time.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to provide a subtitle section corresponding to a playback time selected by a user in a state in which a video image recorded on a DVD disc is reproduced regardless of the reproduction of the subtitle image. An electronic dictionary retrieval control method of an optical disc reproducing apparatus that retrieves an explanation of a word from an electronic dictionary and reproduces a screen.

Another object of the present invention is to generate subtitle-oriented search information in association with the playback of a video image recorded on a DVD disc, extract the subtitle section for the playback time selected by the user from the subtitle-oriented search information to all words of the subtitle section. An electronic dictionary retrieval control method of an optical disc reproducing apparatus that retrieves a commentary from an electronic dictionary and reproduces a screen in real time.

It is still another object of the present invention to prepare a list of low difficulty words that do not need word description in advance, and to reproduce the description of the electronic dictionary for all words of the subtitle section corresponding to the playback time selected by the user. An electronic dictionary retrieval control method of an optical disc reproducing apparatus for excluding words included in the present invention is provided.

1 is a view showing information and data of a volume structure of a DVD disc;

2 is a diagram showing information and data of a file structure of a DVD disc;

3 is a diagram showing a hierarchical structure of a recording aggregate (VOB);

4 is a diagram showing a configuration of a unit sector of presentation data of a DVD disc;

5 is a diagram illustrating a configuration of a unit sector of navigation data of a DVD disc;

6 is a diagram showing the configuration of an optical disc reproducing apparatus to which the electronic dictionary search control method of the present invention is applied;

7A and 7B illustrate an example in which an electronic dictionary commentary of all words included in a caption is displayed on a screen according to a preferred embodiment of the present invention;

8 is a flowchart for explaining the operation of the electronic dictionary search control method of the optical disk reproducing apparatus according to the embodiment of the present invention;

9 is a diagram illustrating an example of generating caption-oriented search information having a table structure according to another embodiment of the present invention;

10 is a view showing another example in which subtitle-oriented search information of a table structure is generated according to another embodiment of the present invention;

11A and 11B are flowcharts for explaining the operation of the electronic dictionary search control method of the optical disc reproducing apparatus according to another embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10: optical disc, 12: optical disc drive unit,

14: RF demodulator, 16: digital signal processor,

18: synchronous detection unit, 20: AV signal processing unit,

22: character code conversion unit, 24: key input unit,

26: electronic dictionary memory, 28: memory,

30: microcomputer, 32: display signal generator,

34: screen overlapping processing unit, 36: synthesis unit.

According to an embodiment of the present invention to achieve the above object, in the state of reproducing specific video and audio information recorded on the optical disc, the first step of the user selection of the electronic dictionary search function for a specific playback section, and the A second step of reading the subtitle section corresponding to the selected time by the electronic dictionary search function; a third step of extracting the subtitle information data corresponding to the read section and converting the subtitle information data into the text data; A fourth step of retrieving all the words from the electronic dictionary memory and extracting the solution settings of each word; and a fifth step of reproducing and displaying the solution settings of all the extracted words in a specific sub-picture screen area of the video screen. An electronic dictionary search control method of an optical disc reproducing apparatus is provided.

According to another embodiment of the present invention to achieve the above object, in the state of playing video and audio information recorded on an optical disc, subtitle information data associated with each video and audio information is converted into text data, and each video and A first step of generating subtitle-oriented search information associated with location information of the audio information, a second step of user selection of an electronic dictionary search function for a specific playback section at the time of reproduction of specific video and audio information, and the electronic A third step of reading a subtitle section corresponding to the selected time by the pre-search function through the subtitle-directed search information, a fourth step of extracting character data of the subtitle corresponding to the read section from the subtitle-oriented search information; All words contained in the text data of the extracted subtitle are retrieved from the electronic dictionary memory, And a sixth step of extracting a set report and a sixth step of reproducing and displaying a solution setting report of all the extracted words in a specific sub-picture screen region of the video screen. to provide.

Hereinafter, the present invention configured as described above will be described in detail with reference to the accompanying drawings.

First, prior to the detailed description of the electronic dictionary search control method of the optical disc reproducing apparatus, the structure of the DVD as an optical disc recording medium, in particular, the DVD ROM, the recording data and the information will be described.

That is, the disk structure of the DVD, that is, the volume, includes a physical sector area (PSA), which is a recording area that is physically accessed by the optical disc player when the disc is inserted, and an external device by a user's selection. The logical sector area (LSA: Logical Sector Area), which is a recording area accessible by the device, is largely divided into a start position (LSN = 0) of the logical sector area. And spaced apart in the circumferential direction by a certain distance (LSN 0 = PSN 0x30000).

On the other hand, the data structure of the DVD (DVD) composed 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).

First, FIG. 1 is a diagram showing information and data of a volume structure of a DVD disc. In FIG. 1, data and information recorded and stored in the volume structure, in particular, the logical sector area LSA, A recording position corresponding to logical sector numbers 0 to 256 includes a volume recognition sequence (Volume Recognition Seq.); Main Volume Descriptor Seq. And Reserve Volume Descriptor Seq. Which record volume ID and time information (Date, Time), Logical Vol. Integrity Address, etc. ), And a file set descriptor (FileN) in which information on the names, starting positions, sizes, and the like of all the 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.

Next, FIG. 2 is a diagram showing information and data of a file structure of a DVD disc. For the data and information recorded and stored in the file structure in the figure, a video title set (Video_TS) directory is shown. Video management information (VMGI: Video Manager Information), a recording set (VIDEO_TS.VOB) for the video management menu, and respective video title set information (VTS_01.0IFO, VTS_02) for a plurality of titles recorded on a DVD. .0IFO ..) and a record set (VTS_01_1.VOB, VTS_01_2.VOB ...) and the like are recorded.

Meanwhile, data and information recorded and stored in the file object structure (Video Object Structure) are shown in FIGS. 3, 4, and 5. First, FIG. 4 illustrates a video object set (VOBS) of a DVD. The hierarchical structure is shown, wherein the VOV is a recording unit for data streams recorded with temporal continuity.

The one recording assembly VOB includes a plurality of reproduction order information Cells for managing the reproduction order of data streams, and the reproduction order information Cells correspond to moving picture data of about 0.4 to 1 second. A plurality of recording object units (VOBU: Video Object Units) having a recording size are managed.

In addition, the recording unit VOBU includes one navigation data for controlling a DVD and presentation data for video and audio reproduction. The presentation data includes audio, video, and the like. Sub picture data is recorded, and the navigation data, audio, video, and sub picture data are sector or pack unit data having a recording size of 2048 bytes, respectively, in one recording unit (VOBU). The sub-picture data may or may not be recorded.

In addition, as shown in FIG. 4, a unit sector configuration of audio, video, or sub-picture data is shown with respect to the unit sector of the presentation data. The audio, video, or sub-picture data, that is, 2048 bytes of presentation data, is shown. 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.

The PES is a data stream other than a 14 header pack header in a 2048 byte data stream, and is a type of data stream common between various types of data streams.

FIG. 5 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. 3. 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. This includes video management information (VMGI), video title set information (VTSI), program chain information (PGCI), and a record aggregate stream (VOB stream), which are navigation information in the form of files. Reproduction control information (PCI), data search information (DSI), and the like, which are navigation information in the form of Pack data, are recorded.

Next, an embodiment of the present invention will be described in detail with reference to the accompanying drawings on the basis of the above-described configuration of the DVD, the description of the record data and the information.

That is, FIG. 6 is a diagram showing the configuration of an optical disc reproducing apparatus to which the electronic dictionary search control method of the present invention is applied.

As shown in Fig. 6, the optical disc reproducing apparatus to which the method of the present invention is applied includes an optical disc drive unit 12, an RF demodulator 14, a digital signal processor 16, a synchronization detector 18, and an AV signal processor ( 2), character code conversion unit 22, key input unit 24, electronic dictionary memory 26, memory 28, microcomputer 30, display signal generator 32, screen overlap processor 34, synthesis It is comprised by the part 36.

The optical disc drive unit 12 includes an optical pickup, a servo circuit, a spindle motor, and a sled motor. The optical disc drive unit 12 drives the spindle motor and the sled motor by a servo operation for tracking and focusing control of the optical pickup. The information recorded on the DVD disk is read out by the rotation drive of the DVD disk and the movement of the optical pickup.

The RF demodulator 14 demodulates the signal from the optical disc 10, that is, the DVD disc, read out from the optical disc drive unit 12 into an RF signal, and the digital signal processor 16 performs the demodulated RF output. The signal is converted into a digital signal.

The synchronization detector 18 detects the synchronization signal from the RF output signal from the RF demodulator 14, and outputs the detected synchronization signal to the servo circuit and the digital signal processor 16 of the optical disc drive unit 12. The AV signal processor 200 separately processes the digital signals digitally converted from the digital signal processor 16 by video and audio signals.

In the figure, the character code conversion unit 22 converts sub-picture unit data into ASCII code data under the control of the microcomputer 30, and the key input unit 24. Is to perform a user operation for executing the electronic dictionary search function together with the reproduction operation of the video and audio information recorded on the optical disc 10, which corresponds to a keypad and a remote controller installed in the main body of the optical disc reproducing apparatus. .

Here, the key input unit 24 selects each word having a low difficulty from among the words stored in the electronic dictionary memory 26 according to a user's operation, and performs a key operation for creating a low difficulty word list.

The electronic dictionary memory (26) stores extensively the Korean word setting report of the general words for foreign language subtitles recorded on each optical disc (10), and the memory (28) controls playback and electronic dictionary search of the microcomputer (30). Data necessary for the control operation of the function and the caption information data read out from the optical disc 10 are stored.

The microcomputer 30 controls operations of the optical disk drive unit 12 and the digital signal processing unit 16 according to a user operation from the key input unit 24 to reproduce the video and audio information recorded on the optical disk 10. And control to enable screen reproduction of the electronic dictionary commentary for all words of the subtitle section associated with the video and audio information of the predetermined playback section.

Here, the microcomputer 30 reads the caption section of the video image corresponding to the time PTS selected by the key input unit 24 to execute the electronic dictionary search function, and is included in the read caption section. The solution setting for all words is read from the electronic dictionary memory 26 and controlled to reproduce the screen.

In addition, the microcomputer 30 generates a table of words classified at low difficulty among all the words stored in the electronic dictionary memory 26 in a table according to a low difficulty word selection operation from the key input unit 24. Based on the table information of the low difficulty word list, the word included in the low difficulty word among the words of the predetermined subtitle section selected by the user is excluded from the screen reproduction item.

In the figure, the display signal processing section 32 includes a caption information signal converted by the character code conversion section 22 into an ASCII code and a solution setting information for each word read out from the electronic dictionary memory 26. Is converted into a display signal such as an OSD (On Screen Disdplay) signal and output.

The screen overlapping processor 34 controls the first sub-picture screen region and the second sub-picture screen region of the video image screen to display the caption information data and the word setting data data from the display signal processor 32 under the control of the microcomputer 30. A screen overlapping process for outputting on the sub-picture screen area is performed.

The synthesizing unit 36 superimposes the caption information data and the word solution setting data from the screen overlapping processing unit 34 and outputs the video image from the AV signal processing unit 20.

On the other hand, when the microcomputer 30 executes an electronic dictionary search function for a specific section according to a key input of the key input unit 24 while playing the video and audio information of the specific section recorded on the optical disc 10, As shown in FIG. 7A, the electronic dictionary search function reads a caption section associated with a video section corresponding to a selected time PTS, and sets resolution of all words included in the caption section. Read from (26), display signal processing of the display signal generating section 32 and screen overlapping processing of the screen overlapping processing section 34 to set the resolution of all words in the second sub-picture screen area 40 on the video screen. The data is played back on the screen.

In FIG. 7A, when an unknown word appears in a state where a user views a performer or a narrator of video and audio information played through a video screen and a speaker, the electronic dictionary search function is executed. Even if the subtitle information associated with the audio information is not reproduced on the screen, it is possible to search the setting information for the words of the desired subtitle section.

On the other hand, the second sub-picture screen area 40 on the video screen on which the resolution setting data of the word is reproduced is not only able to search the resolution setting for a plurality of words in a scrolling manner, but also to the corresponding video and audio information. Since the subtitle information is not displayed, it is possible to designate the screen area as a full screen on the video screen so that it can be played back.

In addition, in FIG. 7B, when the user executes an electronic dictionary search function for a specific video and audio information section, explanations of a plurality of words in the second sub-picture screen area 40 even if subtitles are not turned on initially. The information data is reproduced on the screen, and the subtitle information of the subtitle section associated with the corresponding video and audio information sections can be reproduced on the first sub-picture screen area 42.

Next, an operation according to an embodiment of the present invention made as described above will be described in detail with reference to the flowchart of FIG. 8.

First, a volume structure retrieval mode is set in which an optical disc 10, which is a disc recording medium such as a DVD, is rotated at a constant speed to retrieve data and information recorded and stored in the volume structure on the optical disc 10.

Thereafter, in order to retrieve data and information recorded in the volume structure, first, the optical pickup position of the optical disc drive unit 12 is moved to a recording position corresponding to logical sector number (LSN) 256, and the first shown in FIG. Checking the Main Volume Descriptor Seq. Address recorded in the recording field of the 1st Anchor Point, reading 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, and a file set descriptor address recorded in a specific recording field is checked and stored, and the identified file set descriptor is stored. The information recorded in the File Set Descriptor is read out, and as shown in FIG. 2, the file set descriptor for recording and storing the information and data of the file structure includes a file name, a start, and a file name for a file having a concatenated structure. All information such as size is recorded.

Accordingly, data and information read from the file set descriptor, for example, all recorded file names, logical sector number start LSN, write size, and start address are again stored in memory. Number of video title sets VTSs stored in (28) and recorded by file information (see FIG. 2) stored in the memory 28, start / end addresses of each of the video title sets (VTSs), and partial titles. Stores data and information about the number of sub-pictures, sub-stream identifiers and languages of the sub-pictures.

In this state, when the desired video title set VTS is selected by the user operation of the key input unit 24 (step S10), the video selected by the user from the optical disc 10 in accordance with the operation of the optical disc drive unit 12. The file of title set information (VTS_ON_0.IFO) is read out (step S11).

Accordingly, in the microcomputer 30, the start / end address of the specific video title set, the attributes of the video / audio / sub-picture data, and the partial title in the specific video title set information (VTS_ON_0.IFO) read out from the optical disc 10. (PTT) information and the like, and at the same time, the RF signal demodulated from the RF demodulator 14 is selected by the user through file processing by the digital signal processor 16 and the AV signal processor 20. Playback of the video and audio information contained in (VTS_0N_0.VOB) is started (step S12).

At this time, the caption information is not reproduced on the video screen by the caption off operation by the key input unit 24.

In this state, whether the microcomputer 30 executes an electronic dictionary search function for the contents (for example, the dialogue part of the movie performer) of the video and audio information currently reproduced by the user's operation of the key input unit 24 It is judged whether or not (step S13).

As a result of the determination, when it is determined that the electronic dictionary search function for the progress of the video and audio information currently reproduced by the user's operation by the key input unit 24 is executed, the user inputs the key of the key input unit 24. By means of the electronic dictionary search function, the subtitle section associated with the video and audio information about the video title set information VTS_ON_0.IFO stored in the memory 28 is read out based on the selected time PTS (step S14). ).

When the caption section associated with the video and audio information is read at the time PTS when execution of the electronic dictionary search function is executed by the key input unit 24, the microcomputer 30 subtitle information of the caption section. Data, that is, caption data made up of bitmap image data is converted into ASCII code data by a character recognition operation by the character conversion algorithm of the character code conversion unit 22 (step 15).

Next, the microcomputer 30 refers to a table of the low difficulty word list prepared in advance through setting by the user's key input unit 24 to determine whether a word defined as the low difficulty word exists in the corresponding subtitle section. It is determined (step S16).

As a result of the determination, when it is determined that the low difficulty word exists in the subtitle section corresponding to the time PTS selected by the user, the microcomputer 30 performs a skip process of excluding the low difficulty word; Step S17), the solution setting data for all words of the subtitle information converted into character data is extracted from the electronic dictionary memory 26 (step S18).

In this state, the microcomputer 30 sets resolution data for all words (except low difficulty words) within the subtitle section extracted from the electronic dictionary memory 26 through the display signal generator 32. The display signal is processed to be generated as a display signal such as an OSD signal, and the screen overlap processing unit 34 and the synthesis unit 36 are used to display the second sub-picture screen area 40 (see FIG. 7A) on the video video screen. The playback is displayed (step S19).

On the other hand, the microcomputer 30 determines whether a key input for releasing the setting mode of the electronic dictionary search function is made by user operation by the key input unit 24 (step S20).

As a result of the determination, when it is determined that the user operation for releasing the setting mode of the electronic dictionary search function is performed by the key input of the key input unit 24, the microcomputer 30 sets the setting mode of the electronic dictionary search function. By disabling, the solution setting information for all words of a specific subtitle section displayed in the sub-picture screen area of the video screen is released, and the normal playback of subsequent video and audio information is continued (step S21).

Next, another embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First, the configuration of the optical disc reproducing apparatus to which the electronic dictionary search control method according to another embodiment of the present invention is applied is the same as that of FIG. 6 cited in the embodiment of the present invention, and a detailed description thereof will be omitted.

However, in another embodiment of the present invention, unlike the embodiment, the subtitle information data of the subtitle section associated with the video and audio information is reproduced while the video and audio information is reproduced with respect to a specific video title set selected by the user. The character recognition processing is performed in advance in real time to convert the ASCII data into the character data and store the information. The start time and end time information of each subtitle information data is calculated in advance so as to be stored as subtitle-oriented search information.

Accordingly, when the electronic dictionary search function is executed by the user at the time of playing the specific video and audio information, the ASCII coded subtitle is searched by searching the subtitle section from the subtitle-oriented search information based on the function execution time (PTS). By immediately extracting the information data, the solution settings for all words included in the extracted subtitle information can be reproduced and displayed in the sub-picture screen area of the video screen in real time.

That is, FIGS. 9 and 10 are views illustrating a state in which subtitle-oriented search information of a table structure is generated according to another exemplary embodiment of the present invention.

As shown in FIG. 9, the microcomputer 30 generates a subtitle-oriented search information of a table structure as a subtitle-oriented search information table of a hierarchical structure starting with a video title set, which is the video title set shown in FIG. In the first video title set information (VTS_01_0.IFO) of the information, the starting position and number of each partial title (PTT) and the number of sub-picture data (ie, subtitle information data) of each partial title (PTT) are checked. In generating a PTT table, since the sub-picture data may be recorded for each different language, a sub-picture table and a sub-picture including information about the language. Create a subpicture search table.

In creating the sub-picture data table, first, a video title set recording assembly (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 the sub-picture data is read. In the case of the sub-picture data, the first byte of the pack data is recorded as the sub stream identifier (Sub_ Stream_ID) 0x20 to 0x3F. Therefore, this information is searched and stored in the recording position information of the 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, in association with the sub-picture data number. do.

In addition, the microcomputer 30 converts the sub-picture data, that is, the characters of the subtitle image, recorded as image data in the form of a bitmap using the character code conversion unit 22 into the character data using a character conversion algorithm. As the character conversion algorithm, a pattern recognition method used in a conventional optical character recognition (OCR), for example, an artificial neural network (ANN) 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 generated, the black and white bitmap is classified into respective character groups 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, if 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, the character for the caption image. Since the recognition is possible, the caption image of the sub-picture data is converted into text data by the above operation.

Next, in another example of subtitle-oriented search information shown in FIG. 10, each sub-picture entry has a sub-picture data pointer, a start time and an end time, a number of a cell including the sub-picture, and playback control information of the sub-picture. The program chain number, the number of the video title set including the corresponding sub-picture, and each sub-picture entry is connected in a chain structure.

Next, an operation according to another embodiment of the present invention made as described above will be described in detail with reference to the flowcharts of FIGS. 11A and 11B.

First, a volume structure retrieval mode is set in which an optical disc 10, which is a disc recording medium such as a DVD, is rotated at a constant speed to retrieve data and information recorded and stored in the volume structure on the optical disc 10.

Thereafter, in order to retrieve data and information recorded in the volume structure, first, the optical pickup position of the optical disc drive unit 12 is moved to a recording position corresponding to logical sector number (LSN) 256, and the first shown in FIG. Checking the Main Volume Descriptor Seq. Address recorded in the recording field of the 1st Anchor Point, reading 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, and a file set descriptor address recorded in a specific recording field is checked and stored, and the identified file set descriptor is stored. The information recorded in the File Set Descriptor is read out, and as shown in FIG. 2, the file set descriptor for recording and storing the information and data of the file structure includes a file name, a start, and a file name for a file having a concatenated structure. All information such as size is recorded.

Accordingly, data and information read from the file set descriptor, for example, all recorded file names, logical sector number start LSN, write size, and start address are again stored in memory. Number of video title sets VTSs stored in (28) and recorded by file information (see FIG. 2) stored in the memory 28, start / end addresses of each of the video title sets (VTSs), and partial titles. Stores data and information about the number of sub-pictures, sub-stream identifiers and languages of the sub-pictures.

In this state, when the desired video title set VTS is selected by the user operation of the key input unit 24 (step S30), the video selected by the user from the optical disc 10 in accordance with the operation of the optical disc drive unit 12. The file of the title set information (VTS_ON_0.IFO) is read out (step S31).

Accordingly, in the microcomputer 30, the start / end address of the specific video title set, the attributes of the video / audio / sub-picture data, and the partial title in the specific video title set information (VTS_ON_0.IFO) read out from the optical disc 10. (PTT) information or the like is confirmed, and the caption information data of the caption section of the video title set, that is, the caption data composed of image data in the form of a bitmap is recognized by the character conversion algorithm of the character code conversion section 22. Operation to convert to ASCII code data (step 32).

In this state, the microcomputer 30 generates the subtitle-directed navigation information having a table structure in association with the subtitle position information of each subtitle section and stores it in the memory 28 (step S33). The RF demodulator 14 The demodulated RF signal from the digital signal processor 16 and the AV signal processor 20 to start playback of the video and audio information included in the file data VTS_0N_0.VOB selected by the user. (Step S34).

On the other hand, the microcomputer 30 determines whether or not to execute the electronic dictionary search function for the contents of the video and audio information currently reproduced by the user's operation of the key input unit 24 (step S35).

As a result of the determination, if it is determined that the electronic dictionary search function for the progress of the video and audio information currently reproduced by the user operation by the key input unit 24 is executed, the user inputs the key of the key input unit 24. The subtitle section is read out using the subtitle-directed search information stored in the memory 28 on the basis of the selected time PTS by the electronic dictionary search function (step S36).

Next, the microcomputer 30 extracts the caption information included in the caption section read from the caption-oriented search information (step S37), and is prepared in advance by setting by the user's operation of the key input unit 24. By referring to the table of the low difficulty word list, it is determined whether there is a word defined as the low difficulty word in the corresponding subtitle section (step S38).

As a result of the determination, when it is determined that the low difficulty word exists in the subtitle section corresponding to the time PTS selected by the user, the microcomputer 30 performs a skip process of excluding the low difficulty word; In step S39), solution setting data for all words of the subtitle information converted into character data are extracted from the electronic dictionary memory 26 (step S40).

In this state, the microcomputer 30 sets resolution data for all words (except low difficulty words) within the subtitle section extracted from the electronic dictionary memory 26 through the display signal generator 32. The display signal is processed to be generated as a display signal such as an OSD signal, and the screen overlap processing unit 34 and the synthesis unit 36 are used to display the second sub-picture screen area 40 (see FIG. 7A) on the video video screen. The playback is displayed (step S41).

On the other hand, the microcomputer 30 determines whether a key input for releasing the setting mode of the electronic dictionary search function is made by user operation by the key input unit 24 (step S42).

As a result of the determination, when it is determined that the user operation for releasing the setting mode of the electronic dictionary search function is performed by the key input of the key input unit 24, the microcomputer 30 sets the setting mode of the electronic dictionary search function. By disabling, the setting information for all words of a specific subtitle section displayed in the sub-picture screen area of the video screen is released, and the normal playback of subsequent video and audio information is continued (step S43).

On the other hand, the present invention is not limited to the above-described typical preferred embodiments, but can be carried out in various ways without departing from the gist of the present invention, various modifications, alterations, substitutions or additions are common in the art Those who have knowledge will easily understand. If the implementation by such improvement, change, replacement or addition falls within the scope of the appended claims, the technical idea should also be regarded as belonging to the present invention.

According to the present invention as described above, if the electronic dictionary search function is executed in the state of playing the video and audio information recorded on the DVD disk, the word description for all words included in the subtitle section corresponding to the selection time of the search function As the information can be displayed and played back on the video screen, it is possible to quickly search for commentary of the words to be searched in the desired playback section within a short time by the user's simple operation, and the caption is on. Even if it is not displayed on the screen, it is possible to search the word commentary for the dialogue or narration reproduced from the video and audio information, and thus, the foreign language learning can be conducted more efficiently.

Claims (6)

A first step in which a user's selection of an electronic dictionary search function for a specific playback section is performed while playing specific video and audio information recorded on an optical disc; A second step of reading the subtitle section corresponding to the selected time by the electronic dictionary search function; A third step of extracting caption information data corresponding to the read section and converting the caption information data into character data; A fourth step of retrieving all the words contained in the character-converted subtitle information data from the electronic dictionary memory and extracting the solution setting information for each word; And a fifth step of reproducing and displaying the solution setting information of all the extracted words on a specific sub-picture screen area of the video screen. The method of claim 1, In the fourth step, the low difficulty word list in which the low difficulty word is set is set, and the word included in the low difficulty word list is extracted from all the words of the subtitle information data, and the solution setting information of each word is extracted. An electronic dictionary search control method of an optical disc player. The method of claim 1, The fifth step may include reproducing and displaying a solution setting report for all words of the subtitle section in a sub-picture screen area formed of a full screen of a video screen; And searching for a solution setting word of a word exceeding a sub-picture screen area of a full screen by using a scrolling function. In the state of reproducing video and audio information recorded on an optical disc, converting subtitle information data associated with each video and audio information into text data, and generating subtitle-directed navigation information associated with position information of each video and audio information. Step one, A second step of user selection of an electronic dictionary search function for a specific playback section at the time of playback of the specific video and audio information; A third step of reading the caption section corresponding to the selected time by the electronic dictionary search function through the caption-oriented search information; A fourth step of extracting text data of the caption corresponding to the read section from the caption-oriented search information; A fifth step of retrieving all the words contained in the extracted text data of the subtitle from the electronic dictionary memory and extracting the solution settings for each word; And a sixth step of reproducing and displaying the solution setting information of all the extracted words in a specific sub-picture screen area of the video screen. The method of claim 4, wherein In the fifth step, the low difficulty word list in which the low difficulty word is set is set, and the word included in the low difficulty word list is extracted from all the words of the subtitle information data, and the solution setting information of each word is extracted. An electronic dictionary search control method of an optical disc player. The method of claim 4, wherein The sixth step may include reproducing and displaying a solution setting report for all words of the subtitle section in a sub-picture screen area formed of a full screen of a video screen; And searching for a solution setting word of a word exceeding a sub-picture screen area of a full screen by using a scrolling function.