KR20000002221A - Recursive displaying method of subpicture image - Google Patents

Abstract

PURPOSE: A recursive displaying method of sub-picture image is provided to display a sub-picture image corresponding to a display region for a caption, recursively, when a recursive displaying function is requested by a user. CONSTITUTION: When a requirement for displaying caption is occurred from a user during reading operation of an optical disk, a display apparatus displays a data unit block including the caption data until output of corresponding sub-picture data is ended. A recursive displaying method of sub-picture image comprises steps of searching a data unit block written the caption data in case of requiring the recursive displaying, finding an ending point of displaying the caption, and displaying corresponding data unit block.

Description

Repeat method of video section of sub picture

The present invention relates to a repetitive reproduction method of a video section of a sub picture. More particularly, when a repetitive reproduction request focusing on an image subtitle is requested from a user during the reproduction of an optical disc, the image subtitle displayed on the repetitive reproduction request is displayed. By repeating and automatically repeating the data unit block containing the data unit block from which the sub-picture data is outputted, it is possible to repeat the video section of the sub picture so that the repeated playback of the video focused on a specific video subtitle can be performed quickly and easily. It relates to a regeneration method.

In the related art, when a user wants to repeatedly play a specific section including a specific video subtitle, the user has to directly designate the beginning and end of the section in which the corresponding subtitle to be repeatedly played on the screen is displayed. Use the Scan +/- and Enter function keys to specify the start point and end point of the section where the subtitle to be played repeatedly is designated. When the playback is requested, repeated playback of the designated section is performed until the dismantling request of the user is made.

However, the repetitive playback method of the conventional video section made as described above is cumbersome because the video must be directly searched for the repeated playback of the section including the subtitles and designated before and after, especially in the case of a user who wants to learn a language. It is often necessary to repeatedly listen to, in which case it was virtually impossible to use the above-described conventional interval repetition.

Accordingly, the present invention has been made to solve the above problems, and the method of repeating the video section of the sub picture for automatically repeating the video corresponding to the display section of the video subtitle at the time of the request at the time of the user's repeated playback request The purpose is to provide.

1 shows a general configuration of an optical disc reproducing apparatus,

2 is a flowchart showing a flow of a preferred embodiment of the method for repetitively playing a video section of a subpicture according to the present invention;

FIG. 3 illustrates a video recording unit (VOBU) packet of a digital multi-function disc (DVD).

Fig. 4 shows, for example, a separate output of a playback stream according to the screen display time (PTS) of a recording signal.

FIG. 5 illustrates a repeat playback section according to detection of an output end time (PTS) of a caption video.

※ Explanation of code for main part of drawing

10: digital multi-function disc (DVD) 11: pickup section

12: R / F part 13: drive part

20: servo unit 30: digital signal processing unit

40: buffer 50: microcomputer

61: video decoder 62: subpicture decoder

63: audio decoder 64: synthesizer

In accordance with an aspect of the present invention, there is provided a method of repetitively reproducing a video section of a subpicture, the method comprising: a first step of retrieving a data unit block in which a caption image is recorded upon a repetition request; A second step of identifying a display end time of the caption image in the searched data unit block; And a third step of repeatedly reproducing the retrieved data unit block and the corresponding unit block at the end of the display.

In the method of repetitively playing a video section of a subpicture according to the present invention as described above, if a repetitive playback request of a caption video displayed by a user is requested during playback of an optical disc, a caption video to be repeatedly played back from the data unit block currently being played. From the start position of the recorded data unit block and the data unit block of the start position, the end point of the subtitle image is checked, and the data unit block at the end point is reproduced by playing back from the identified position. By repeating the operation of starting from the data unit block of the start position, the corresponding video section of the specific subtitle video is repeatedly played.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a method of repeatedly reproducing an image section of a subpicture according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram of an optical disk reproducing apparatus for implementing a method of repetitively playing a video section of a subpicture according to the present invention, comprising: a pickup section 11 for detecting a recording signal from the surface of the DVD 10; A drive unit 13 driving the pickup unit 11 and the motor M; An R / F unit 12 for filtering the signal detected by the pickup unit 11; From the tracking error (TE) and the focus error (FE) signal of the pickup section 11 and the rotational speed of the DVD 10, the drive of the drive unit 13 is controlled, and the R / F section 12 A servo unit 20 for detecting synchronization of an output signal; A digital signal processor (30) for recovering the after-shape shaping signal to a digital signal using the detected synchronization, and then restoring the original compressed video data to separate types according to the format of the data; A buffer (40) for temporarily storing each data outputted separately; The microcomputer 50 for controlling the reading of the data according to the presentation time stamp (PTS) of the video data, the corresponding subpicture data, and the audio data in the stored data of each type, and each of the compressed video data and the sub-input, respectively. A video decoder 61 for decoding picture data and audio data and converting the picture data and the audio data into video and audio signals; Subpicture decoder 62; Audio decoder 63; And a synthesizer 64 for synthesizing the converted video, subpicture, and video text signal.

FIG. 2 is a flow chart showing a preferred embodiment of a method for repetitively reproducing a video section of a subpicture according to the present invention. Referring to the configuration of the reproducing apparatus of FIG. 1, FIG. It explains in detail.

First, according to a user's DVD 10 playback request through the microcomputer 50 (S10), the microcomputer 50 controls the pickup unit 11 to detect a recording signal on the DVD 10. As shown in Fig. 3, the recording signal on the DVD 10 is recorded in VOBU units, which is a video recording unit of the DVD, and the high frequency signal detected by the pickup section 11 receives the R / F section 12. After filtering at, the synchronization is detected by the servo unit 20, and the digital signal processing unit 30 recovers the original digital data from the filtered signal using the detected synchronization. The video, audio, and subpicture data of the recovered digital data are separated by type, respectively, and are temporarily stored in the buffer 40. The navigation pack (N-Pack) data of the restored data is stored by the microcomputer 50 itself. Remember in memory The.

The microcomputer 50 checks the presentation time stamp (PTS: Presentation Time Stamp) of each data among the data temporarily stored in the buffer 40, and reads the data in the order of the confirmed display time. The decoder outputs the data to the corresponding decoder, and each decoder that receives the output data decodes the synthesized data, and the synthesizer 64 synthesizes the output main and sub-picture images, thereby reproducing the DVD 10. It is made (S20).

However, when the user requests repetitive reproduction of the subtitles by the subpicture image during the above reproduction operation (S30), the microcomputer 50 stores the DSI (Data Search Information) field in the N-Pack data which is stored in itself. The SYNCI (Synchronous Information) area is searched to read the start address value of the N-Pack in the VOBU including the sub picture image to be repeatedly played back, that is, the subtitle image currently output on the screen (S40). 20 and the drive unit 13 move the pickup unit 11 to the start point of the corresponding VOBU (VOBU 1 in the situation of FIG. 5) in which the read address is recorded (S41). Accordingly, the microcomputer 50 detects and confirms the output end point of the PTS unit of the sub picture data in the data read from the pickup unit 11 and stored in the buffer 40 as described above (S42). ) First screen display It reads out the sub picture data and the corresponding audio and video data to which each is respectively reproduced in the output as the decoder (S43).

As described above, when the output end point of the sub picture data, that is, the image metabolism is confirmed, the microcomputer 50 is restored by the digital signal processor 30 and the main image data (of the data stored separately by type in the buffer 40). The screen display time (PTS) of the video stream of FIG. 5 is continuously searched (S51) to determine when the image metabolism should be outputted. For example, as shown in FIG. When the first and last screen display times are 1.28 and 2.38, respectively, when the subpicture data is played back at 1.28, one complete video metabolism requested by the user for repeated playback is displayed on the screen. Is restored to the image and is continuously outputted. When the PTS of the main image data outputted as described above is terminated, If the comparison is greater than the 2.38 (S60).

When the PTS of the currently output main image exceeds 2.38 during the comparison process, that is, when the video pack PACK having a PTS of 2.4 is encountered in FIG. 5, the microcomputer 50 is continuously displayed on the screen. The video subtitle is terminated (S61), and the repetition start point previously identified, that is, the video subtitle is displayed by moving to the position of the VOBU 1 of FIG. It will be repeated until this user's interruption request.

The method of repeating the video section of the sub picture according to the present invention as described above, the user can select the subtitle image that the user wants to repeat repeatedly without the hassle of having to designate the metabolic section to be repeatedly played. By automatically repeating the playback, it is a very useful invention that can conveniently obtain many learning effects for the user who wants to learn a language using an optical disk such as a DVD.

Claims (2)

A first step of retrieving a data unit block in which a caption image is recorded at the time of repeat playback request; A second step of identifying a display end time of the caption image in the searched data unit block; And And repeating playback of the retrieved data unit block and the corresponding unit block at the end of the display. The method of claim 1, The third step, Comparing an output time point of the main image data to be reproduced and output with the display end time; And And reproducing from the retrieved data unit block when the display end point of the output point has elapsed.