JP2004180097A - Subpicture displaying method, and program and dvd player for performing the method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a subpicture displaying method which can simultaneously display a plurality of captions on video and is excellent in convenience and to provide a program and a DVD player for performing the method. <P>SOLUTION: According to this subpicture displaying method, a DVD video disk is used to respectively decode pixel data in subpicture packets provided in each of the plurality of captions with time division, and to simultaneously display the plurality of captions on the video. Consequently, the subpicture displaying method can simultaneously display the plurality of captions on the video and is excellent in convenience. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a sub-picture display method, a program for implementing the method, and a DVD playback device, and more particularly to a DVD-video disc in which audio and subtitles in multiple languages are recorded and used by a user, for example, as a learning material for language learning. The display technology at the time.
[0002]
[Prior art]
Conventionally, by utilizing the fact that a plurality of languages are recorded on a DVD-video disc, a user selects one of a plurality of languages and uses the selected language as a learning material for language learning for learning the selected language. Can be. For example, according to the conventional DVD reproducing apparatus for reproducing the DVD-video disc described in Patent Document 1, the sub-picture unit data is separated from the program stream reproduced from the digital video disc, and the separated One sub-picture unit data is decoded to detect the first sub-picture position information, and further, the separated second sub-picture unit data is decoded to detect the second sub-picture position information. Then, a display position of the detected second sub-picture is calculated based on the detected display position of the first sub-picture. The display position of the calculated second sub-picture is changed, and the first sub-picture data and the second sub-picture data are combined with the video data and output. According to the conventional DVD playback apparatus that performs such processing, a plurality of sub-pictures can be displayed on the playback video screen without overlapping at the same time. This conventional DVD playback apparatus can play back a DVD-video disc on which a plurality of languages are recorded and effectively utilize it for language learning, and also allows people of different languages to enjoy the same DVD software at the same time. Furthermore, in order for a Japanese to play a movie or the like, the audio can be English and the subtitles can be Japanese, and the DVD-video disc can be used for English listening learning.
[0003]
[Patent Document 1]
JP-A-10-215409
[Problems to be solved by the invention]
However, according to the conventional method, the subtitles that can be displayed at a time are only one language. Therefore, when the user cannot hear English and switches the subtitle language to English and tries to reproduce again, the Japanese Since there is no caption, there is a problem in convenience such that it is difficult to understand which Japanese is displayed in English.
[0005]
Accordingly, an object of the present invention is to solve the above-mentioned problems of the prior art and to provide a sub-picture display method which is capable of displaying a plurality of subtitles simultaneously and is excellent in convenience, a program for implementing the method, and a DVD reproducing apparatus. And
[0006]
[Means for Solving the Problems]
In order to solve the above problems, according to the sub-picture display method of the present invention, each pixel data in a sub-picture packet provided for each of a plurality of subtitles is decoded in a time-division manner using a DVD video disc. Multiple subtitles on the video simultaneously. Therefore, a plurality of subtitles can be simultaneously displayed on a video, which is excellent in convenience.
[0007]
Further, using a DVD video disk, each of the pixel data in the sub-picture packet provided for each of a plurality of subtitles is reproduced by a different DVD decoder and displayed on a video, and the plurality of subtitles are displayed simultaneously. Therefore, a plurality of subtitles can be simultaneously displayed on a video, which is excellent in convenience.
[0008]
Further, the sub-picture packet includes a sub-picture unit header, which is a header indicating the language of the subtitle, a pixel data storage area for storing the language of the subtitle as an image, and a subtitle display including a subtitle display start time and a display end time. And a sub-picture display control sequence table area for storing related control data.
[0009]
In the case of the repeat mode in which video, audio, and subtitles are repeated, the display returns to the display start time at the same time as the display end time, and the video, audio, and subtitles are repeated. Therefore, a plurality of subtitles can be repeated more easily.
[0010]
Further, in the case of the still mode in which the video or the subtitle is temporarily stopped, the video, the audio, and the subtitle being reproduced are temporarily stopped at the same time as the display end time. Therefore, the user can advance subtitles in accordance with language understanding.
[0011]
Also, a DVD playback device as another invention is a sub-picture decoding means for displaying each of pixel data in a sub-picture packet provided for each of a plurality of subtitles on a video in a time-division manner, Sub-picture position control means for controlling a display position. Therefore, a plurality of subtitles can be displayed at the same time, and a DVD playback device excellent in convenience can be provided.
[0012]
Further, a plurality of subtitles are a plurality of language displays for learning, and a DVD playback apparatus capable of reproducing a DVD for language learning teaching material with excellent convenience by playing a DVD video disc displaying a sub picture for language learning can be provided. .
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0014]
(Constitution)
FIG. 1 is a diagram showing a configuration of a sub-picture packet for subtitle reproduction by the DVD reproduction device of the present invention. The sub-picture unit 100 shown in FIG. 1 includes a sub-picture unit header 101, pixel data 102, and a sub-picture display control sequence table (SP_DCSQT) 103. In the sub-picture unit 100 having such a configuration, data of one subtitle language is recorded. The sub-picture unit header 101 records the size of the sub-picture unit and the head address of the sub-picture display control sequence table. The pixel data 102 stores compressed subtitle language image data to be actually displayed. The sub-picture display control sequence table 103 records control data relating to the subtitle display start time and display end time, the subtitle display position, and the like. The decoder mounted on the DVD playback device temporally switches the subtitle display in accordance with the control data. However, the user for the purpose of language learning cannot output subtitles in only one language at a time, as well as video, audio, The sub-picture may advance, which is inconvenient for learning.
[0015]
Therefore, the language learning sub-picture display method according to one embodiment of the present invention is a method for simultaneously displaying subtitles in a plurality of languages. This method can be realized by operating one sub-picture decoder in a time-division manner or by mounting a plurality of sub-picture decoders. At this time, the subtitle display end time is determined from the sub-picture display control sequence table 103 in FIG. 1, and at the same time as the display end time, still (pause) is applied to the video, audio, and subtitle being reproduced. Alternatively, it is possible to return to the video and audio at the display start time at the same time as the display end time, and to repeat until the user can understand. When the user releases the still or repeat, the video, audio, and subtitle of the next subtitle portion are reproduced, and when the display end time of the subtitle is reached, the still (repeat) is repeated.
[0016]
FIG. 2 shows a system configuration of a DVD playback system that realizes the above operation. Referring to FIG. 1, the DVD playback system mainly includes a DVD-ROM drive 10, an MPEG decoder 20, an SDRAM 30, and a host device 40. The MPEG decoder 20 includes a bit stream input / separation unit 21, a video decoding control unit 22, a video decoding unit 23, a reproduction control unit 24, a sub-picture decoding unit 25, a sub-picture position control unit 26, and a video output unit 27. And an audio decoding unit 28. Further, the SDRAM 30 has a track buffer 31, a video buffer 32, a NAVI buffer 33, an SPU buffer 34, a sub-picture memory 35, an audio stream buffer 36, and a video frame memory 37. Then, the bit stream input / separation unit 21 determines the data content input from the DVD-ROM drive 10 based on the packet header shown in FIG. 3, and determines the video pack (V_PCK), audio pack (A_PCK), It is separated into a sub-picture pack (SP_PCK) and a navi pack (NV_PCK). The video decoding control unit 22 processes the data read from the video buffer 32 and controls the processing of the video decoding unit 23. The video decoding unit 23 decodes the video stream according to the instruction from the video decoding control unit 22, and outputs the result to the video frame memory 37. The playback control unit 24 controls each component according to an instruction from the host device 40, and manages the playback timing of video, audio, and sub-pictures. The sub-picture decoding unit 25 decodes a sub-picture. The sub-picture position control unit 26 controls the display position so that a plurality of sub-pictures do not overlap when switching to the language learning mode. The video output unit 27 reads out the image data specified by the reproduction control unit 24 from the video frame memory 37, combines the image data with the sub-picture, and outputs the resultant. The audio decoding unit 28 performs decoding of an audio stream and various processes. Further, the track buffer 31 is a buffer for storing data so that the data is not interrupted. The video buffer 32 is a buffer that stores a video stream. The NAVI buffer 33 is a buffer for storing navigation packs. The SPU buffer 34 is a buffer for storing sub picture units. The sub-picture memory 35 stores the decoded sub-picture data. The audio stream buffer 36 is a buffer that stores an audio stream. The video frame memory 37 stores the decoded video data.
[0017]
The above operation will be described in more detail with reference to FIG. 4 showing an operation flow. The user specifies the normal operation mode or the language learning mode (step S101). Here, the language learning mode includes a repeat mode, a pause mode, and the like. The host device 40 of FIG. 2 issues a command to the reproduction control unit 24 of the MPEG decoder 20 (step S102). Then, the sub-picture decoding unit 25 decodes the caption in one language (Step S103). Then, it is determined whether or not the operation mode specified by the user is the language learning mode (step S104). If the operation mode is the language learning mode (step S104; YES), it is determined whether or not there are a plurality of language sub-pictures (step S104). Step S105). If there are a plurality of language sub-pictures (step S105; YES), subtitles of one language are stored in the sub-picture memory 35 of FIG. 2 (step S106). Then, it is checked whether or not there is another language sub-picture (step S107). If there is another language sub-picture (step S107; YES), subtitles in other languages are decoded (step S108). Then, after step S108 or when there is no other language sub-picture in step S107 (step S107; NO), the subtitles are not overlapped with each other by looking at the data of the sub-picture display control sequence table 103 in FIG. The position is changed (step S109). After that, all sub-pictures (captions) are output in synchronization with the video and audio (step S110). Then, the temporary video, audio, and subtitle are stopped at the display end time of the sub-picture display control sequence table 103 (step S111). It is checked whether or not the language learning mode after the stop is the repeat mode (step S112). If it is the repeat mode (step S112; YES), it is determined whether or not the repeat mode is released (step S113), and the release is performed. In this case (step S113; YES), the process proceeds to the next subtitle (step S117). If not canceled (step S113; NO), the process returns to step S103. On the other hand, if the repeat mode is not set in step S112, the temporary stop mode is set (step S115), and the pause is released by the user (step S116), and the process proceeds to the next subtitle (step S117). If the language learning mode is not set in step S104 (step S104; NO), and if there is no plurality of language sub-pictures in step S105 (step S105; NO), the sub-picture (caption) is synchronized with video and audio. Is output (step S118), and the mode shifts to the normal operation mode (step S119).
[0018]
Therefore, by using the display start time and the display end time of the subtitle, the pause and the repetition can be automatically realized, and the convenience can be improved.
[0019]
The embodiment of the present invention has been described above. The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention.
[0020]
【The invention's effect】
According to the present invention described above, a plurality of subtitles can be displayed at the same time, and a sub-picture display method excellent in convenience, a program for implementing the method, and a DVD reproducing apparatus can be provided.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a configuration of a sub-picture packet for subtitle reproduction by a DVD reproduction device.
FIG. 2 is a block diagram illustrating a system configuration of a DVD playback system.
FIG. 3 is a diagram showing data contents input from a DVD-ROM drive.
FIG. 4 is a flowchart showing an operation according to a sub-picture display method according to one embodiment of the present invention;
[Explanation of symbols]
Reference Signs List 10 DVD-ROM drive 20 MPEG decoder 30 SDRAM 40 Host device 100 Sub-picture unit 101 Sub-picture unit header 102 Pixel data 103 Sub-picture display control sequence table

Claims (9)

Using a DVD video disk, each of pixel data in a sub-picture packet provided for each of a plurality of subtitles is decoded in a time-division manner and displayed on a video, and a plurality of subtitles are simultaneously displayed. Picture display method. Using a DVD video disk, each of pixel data in a sub-picture packet provided for each of a plurality of subtitles is reproduced by a different DVD decoder and displayed on a video, and a plurality of subtitles are displayed simultaneously. Sub-picture display method. The sub-picture packet includes a sub-picture unit header, which is a header indicating a subtitle language, a pixel data storage area for storing the subtitle language as an image, and a subtitle display including a subtitle display start time and a display end time. 3. The sub-picture display method according to claim 1, further comprising a sub-picture display control sequence table area for storing control data. 4. The sub-picture display method according to claim 3, wherein in the case of a repeat mode in which video, audio and subtitles are repeated, the display start time is returned at the same time as the display end time, and the video, audio and subtitles are repeated. . 4. The sub-picture display method according to claim 3, wherein in a still mode in which a video or a subtitle is paused, the video, audio or subtitle being reproduced is paused simultaneously with the display end time. Using a DVD video disk, a computer implements a procedure in which pixel data in sub-picture packets provided for each of a plurality of subtitles are time-divisionally combined and displayed on video, and a plurality of subtitles are simultaneously displayed. Program for displaying sub-pictures. Using a DVD video disk, a computer reproduces each pixel data in a sub-picture packet provided for each of a plurality of subtitles with a different DVD decoder and displays the data on a video, and simultaneously displays a plurality of subtitles. A sub-picture display program to be executed. Sub-picture decoding means for displaying each of pixel data in a sub-picture packet provided for each of a plurality of captions on a video in a time-division manner, and sub-picture position control means for controlling a display position of a caption of a sub-picture. A DVD playback device comprising: 9. The DVD reproducing apparatus according to claim 8, wherein the plurality of subtitles are a plurality of language displays for learning, and reproduce a DVD video disc on which sub-pictures for language learning are displayed.

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