KR100538851B1 - Method for reproducing a text repeatedly in optical disc device - Google Patents

Abstract

According to the present invention, sub-picture data recorded on a high density optical disc such as a DVD (Digital Versatile Disc) or the like, and corresponding video data and audio data are input by a user's predetermined single key input for language learning. A repetitive reproduction method of a subtitle of an optical disc device for reproducing, the method comprising: a first step of performing a general reproducing operation for an optical disc; A second step of storing a recording size and search information of the sub picture unit at each time point of displaying subtitle data (sub picture unit) during the reproduction operation; And a third step of repeatedly reproducing the corresponding subpicture unit and corresponding video / audio data from the stored recording size and search information in a state of interruption of the normal playback operation when a predetermined single key input for repeating subtitles is repeated. The subtitles are repeatedly played with only a single key input, and the subtitle data is reproduced in a sentence having a continuity in time, and the video and audio data corresponding to the subtitle data are also repeatedly played. In addition, it is a very useful invention that allows the user to easily perform audio-visual language learning, thereby greatly increasing the efficiency of language learning.

Description

Method for reproducing a text repeatedly in optical disc device}

According to the present invention, sub-picture data recorded on a high density optical disc such as a DVD (Digital Versatile Disc) or the like, and corresponding video data and audio data are input by a user's predetermined single key input for language learning. The present invention relates to a repetitive reproduction method of subtitles of an optical disc device that facilitates language learning by a user by repeatedly outputting and outputting the same.

In general, an optical disc device such as a DVD player or the like reads video and audio data recorded as a main title onto a DVD, which is a high-density optical disc, and processes playback signals into digital video and audio signals. Afterwards, high-quality video and high-quality audio are output and displayed through a connection device such as a general television.

On the other hand, the DVD may additionally record subtitle data (subpicture data) of various national languages, and the subtitle data may be reproduced and output in association with video and audio data corresponding to the main title. Sub Title) can be randomly recorded and stored in some sections of the DVD.

Accordingly, the DVD player reads and reproduces the video and audio data recorded as the main title on the DVD, and also reads and reproduces the subtitle data recorded as the subtitle in a partial section of the DVD.

Therefore, the user having the DVD player can watch the video data of the main title read out and reproduced from the DVD as a high-definition video through the main video screen of a general television, and of course, the caption data read out and reproduced from the DVD. It is possible to watch through the sub-picture screen of the general television, thereby improving the language skills.

However, if the user wants to play the subtitles repeatedly while learning a language while watching a subtitle read out from an optical disc such as a DVD, the user may have to search for the subtitles through several keystrokes. Of course, there is a problem that will reduce the efficiency of language learning as well as feeling the inconvenience.

Accordingly, the present invention has been made to solve the above problems, and by using a predetermined single key input of a user, the present invention provides subtitle data recorded on a high density optical disc such as a DVD and the like, and corresponding video and audio data. It is an object of the present invention to provide a repetitive reproduction method of a subtitle of an optical disc device that facilitates language learning by a user by repeatedly playing.

Subtitle repetitive reproduction method of the optical disk apparatus according to the present invention for achieving the above object, the first step of performing a normal playback operation for the optical disk; A second step of storing a recording size and search information of the sub picture unit at each time point of displaying subtitle data (sub picture unit) during the reproduction operation; And a third step of repeatedly reproducing the corresponding subpicture unit and corresponding video / audio data from the stored recording size and search information in a state of interruption of the normal playback operation when a predetermined single key input for repeating subtitles is repeated. It is characterized by what is included.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of a method for repeatedly captioning a subtitle of an optical disc device according to the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 shows the configuration of an embodiment of an optical disc apparatus (DVD Player) to which a caption repetitive reproduction method of an optical disc apparatus according to the present invention is applied, and an optical pickup for reading a recording signal from an optical disc (DVD) 10. 20; A sled motor 21 for moving the optical pickup 20; A spindle motor 11 for rotating the optical disc 10; An R / F unit 30 for shaping the high frequency signal output by the optical pickup 20 to output a binary signal; A digital signal processor 40 for restoring the binary signal into original compressed data with its own clock phase-locked to the binary signal and separately outputting the binary signal for each data type; A buffer (41) for temporarily storing each of the separated data; The video decoder 42, the audio decoder 43, and the subpicture decoder 44 which decode the temporarily stored compressed video data, audio data, and subpicture data of each type and convert them into video, audio, and subtitle signals. ; A synthesizer 45 for synthesizing the converted video and caption signals; The motor drive unit which drives the optical disk 10 by applying an appropriate driving voltage to the spindle motor 11 and rotates the optical disk 10 and also applies an appropriate driving voltage to the sled motor 21 to move the optical pickup 20. 60; Servo unit 50 for controlling the drive of the motor drive unit 60; A memory 71 for storing recording position information or reproduction time information for searching and reproducing the sub picture data; In addition to the general function key, the key input unit 72 is provided with a 'subtitle repetition key' to facilitate the language learning of the user as a single key; And sub-picture data corresponding to the corresponding subtitles by controlling the operation of the respective constituent means, and in particular, when the subtitle repetition key of the key input unit 72 is input, using the stored information of the memory 71. And a microcomputer 70 for searching and repeatedly playing corresponding video and audio data.

FIG. 2 is a flow chart illustrating a preferred embodiment of the method for repeating the caption repetition of the optical disk device according to the present invention. Hereinafter, the caption repeat playback method of FIG. 2 according to the present invention will be described in detail with reference to FIG. do.

First, in the state where the high-density optical disc (DVD) 10 in which video and audio data as a main title and subtitle data (sub picture data) are recorded as a subtitle is inserted into the optical disc apparatus of FIG. 70, in response to the user's request (S10) through the key input unit 72 performs a normal playback operation for the optical disk 10, which will be briefly described as follows.

First, the microcomputer 70 rotates the optical disc 10 by applying an appropriate driving voltage to the spindle motor 11 and the sled motor 21 through the servo unit 50 and the motor drive unit 60. While driving, the optical pickup 20 detects a recording signal from the rotationally driven optical disc 10.

Accordingly, the high frequency signal outputted by the optical pickup 20 is filtered by the R / F unit 30 to be output as a binary signal, and the digital signal processing unit 40 has its own clock phase-locked to the binary signal. After the binary signal is restored to the original compressed data, it is separately outputted for each data type, that is, video, audio, and subpicture data. In this case, the data for each type of separated output is temporarily stored in the buffer 41. (S11).

The microcomputer 70 outputs the data for each type to the corresponding decoders 42, 43, and 44 in order based on the screen display time information (PTS: Presentation Time Stamp) of each type of data that is temporarily stored ( S12), the corresponding decoders 42, 43, and 44 receiving the output data of each type are decoded and converted into video and audio signals and subtitle signals, and the synthesizer 45 converts the converted video and By synthesizing the caption signal and outputting the signal to an external device connected to the signal (S13), the user can watch the video including the caption through the external device and listen to the audio corresponding thereto.

During such a playback operation, the microcomputer 70 reads the recording size (SPU_SZ) information and the starting recording position (PTS of SPU) information or the playback time of the current subpicture unit displayed and reproduced by the subpicture decoder 44. SPU_SA) information is recorded and stored in the memory 71 as the search information. For this purpose, the microcomputer 70 reproduces and displays the current subpicture unit (eg, reproduced by the subpicture decoder 44). When the recording size (SPU_SZ #k) of the kth) is compared with the recording size (SPU_SZ # k-1) of the subpicture unit displayed immediately before playback, and the recording size does not match each other, new subpicture data is reproduced. It is determined that the information is displayed, and the recording size (SPU_SZ #k) information and the start recording position (PTS of SPU #k) information or reproduction time (SPU_SA #k) information of the current subpicture unit are used as search information, and the memory 71 Will be saved.

As shown in FIG. 3, the subpicture unit includes a sub-picture unit header (SPUH), pixel data (PXD: pixel data), and a sub-picture display control sequence table (SP_DCSQT: Sub-Pic). Display control sequence table, wherein the subpicture unit header (SPUH) has two bytes of size information (SPU_SZ) for indicating the recording size of the subpicture unit, and a start recording in which the subpicture display control sequence table is recorded. Two bytes of start address (SP_DCSQT_SA) information for indicating the position are included and recorded.

In addition, the subpicture display control sequence table SP_DCSQT includes a plurality of subpicture display control sequences SP_DCSQ 0,1,2 .. The subpicture unit as shown in FIG. The subpicture stream is read out and reproduced into a successive subpicture stream having a plurality of subpicture packs SP_PCK i, i + 1 and i + 2... With a recording size of 2048 bytes.

During such a reproducing operation, if the user requests reproduction termination through the key input unit 72 (S20), the microcomputer 70 stops the normal reproducing operation.

However, if the user presses the 'subtitle repetition key' provided in the key input unit 72 during the reproducing operation (S30), the microcomputer 70 stops the normal reproducing operation and the general reproducing operation. The playback position on the interrupted optical disc 10 is stored.

On the other hand, the microcomputer 70 searches the memory 71 for the most recent recorded search information at the time when the 'subtitle repeat key' is input, and detects the start recording position of the k-th subpicture data from the search information. Subsequently, the microcomputer 70 is a sub picture unit having temporal continuity, for example, "How are you?" The subpicture data repetitive reproduction operation for reproducing and displaying the subpicture data from the beginning of the subpicture unit corresponding to the subtitle of the complete sentence, etc. is performed a predetermined number of times, wherein the microcomputer 70 performs the predetermined subpicture. During the repeated reproduction of data, corresponding video and audio data are read out from the buffer 41 and output to the corresponding decoder based on the screen display time information (PTS: Presentation Time Stamp). Corresponding video and audio data are also repeatedly played (S31).

During language learning through repeated playback of such caption data, when a user presses a specific key (for example, 'end key') provided in the key input unit 72 for ending the repeated caption playback (S40). The microcomputer 70 stops the above repetitive reproducing operation and performs the above general reproducing operation from the stored reproducing position on the stored optical disc 10 until the reproducing operation is completed (S41).

As in the above embodiment, when the user presses the 'subtitle repeat key' of the key input unit 72 once during the reproducing operation, the microcomputer 70 searches for the most recent recorded at the time when the 'subtitle repeat key' is input. If the user presses the subtitle repetition key once more, the micom 70 reproduces the previously displayed k-1th subpicture data. Repetition of a series of sub picture data for detecting time information or start recording position information in the memory 71 and reproducing and displaying sub picture data from the start recording position of the k-1th sub picture data based on the detected information. The playback operation is performed a predetermined number of times.

As described above, according to the present invention, the user can predetermine and repeat playback of the subpicture data that is currently displayed or previously displayed by using a predetermined single key input, thereby increasing the efficiency of language learning. do.

As mentioned above, the above-described preferred embodiment of the present invention is disclosed for the purpose of illustration, and may be applied to another optical disc device other than a DVD player, and those skilled in the art will also appreciate the technical spirit of the present invention disclosed in the appended claims. And various other embodiments may be improved, changed, replaced or added to within the technical scope of the present invention.

In the above-described repeated caption reproducing method of an optical disc device according to the present invention, when a user inputs a predetermined single key for language learning, the caption data (subpicture data) is repeatedly played, but the temporal continuity is achieved. Not only does the dialogue consist of one sentence to be played without interruption, but also the video and audio data corresponding to the subtitle data are repeatedly played, thereby making the audio-visual learning easier for the user, thereby improving the efficiency of language learning. It is a very useful invention that can greatly increase the.

1 is a block diagram of an optical disk apparatus to which a caption repetitive reproduction method of the optical disk apparatus according to the present invention is applied.

Fig. 2 shows the flow of a preferred embodiment of the subtitle repetitive reproduction method of the optical disc apparatus according to the present invention.

3 shows a structure of a sub picture unit of a DVD to which the present invention is applied;

4 shows a correspondence relationship between a sub picture unit and a sub picture pack of a DVD to which the present invention is applied.

※ Explanation of code for main part of drawing

10 optical disc 11: spindle motor

20: optical pickup 21: sled motor

30: R / F part 40: digital signal processing part

41: Buffer 42: Video Decoder

43: audio decoder 44: subpicture decoder

45: synthesizer 50: servo unit

60: motor drive unit 70: microcomputer

71: memory 72: key input unit

Claims (7)

In a method of playing an optical disc on which subtitle data (Sub-Picture Unit) is recorded, A first step of performing a normal playback operation on the optical disc; A second step of storing the recording size and the search information of the sub picture unit at every point in time when the sub picture unit is displayed on the screen during the reproduction operation; And A third step of repeatedly reproducing a corresponding subpicture unit and corresponding video / audio data from the stored recording size and search information in a state in which the normal playback operation is interrupted when a predetermined single key is input for repeated caption reproducing; A subtitle repetitive playback method of an optical disk device. The method of claim 1, And repetitive reproduction of the corresponding video / audio data of the third step is performed based on screen display time information of the video / audio data. delete The method of claim 1, The second step may include comparing a recording size of the sub picture unit continuously input with a recording size of the stored sub picture unit; And And recognizing the successive inputted sub picture units according to the comparison result, storing the recording size and search information of the new sub picture unit. . The method of claim 4, wherein In the third step, the subtitle unit repeatedly reproduces a predetermined number of times based on the stored information when the predetermined single key is input. The method of claim 4, wherein And the recording size of the subpicture unit is detected and confirmed by two-byte subpicture unit size (SPU_SZ) information recorded in the header of the subpicture unit. The method of claim 4, wherein And the search information includes the reproduction time information of the sub picture unit or the start recording position information.