KR100662398B1 - Digital multimedia player - Google Patents

Abstract

The present invention relates to a digital multimedia player having a closed caption insertion device. The present invention provides an apparatus for encoding a caption data input to a digital multimedia player in a format that can be inserted into a video vertical playback (VBI) section after processing by a caption processor; The subtitle encoding apparatus provides a digital multimedia player comprising an inserter for inserting encoded subtitle data into a VBI section of an input video signal. Therefore, when the digital multimedia playback according to the present invention inserts the subtitle data input in the video vertical playback (VBI) section, it has a function to selectively display the subtitle even when the multimedia is stored and replayed from an external device. .

Closed Caption, PMP, DivX Player

Description

Digital multimedia player {Digital multimedia player}

1 is a flowchart of a caption processing of a conventional multimedia player.

2 is a closed caption processing flowchart showing an embodiment of a multimedia player according to the present invention;

 <Description of the reference numerals for the main parts of the drawings>

10: input data 30: video / audio decoder

50: caption processor 55: closed caption encoder and insertion device

70: video processor 90: graphics processor

100: user interface 130: video output terminal

132: external device 150: built-in monitor

The present invention relates to a digital multimedia player, and more particularly, to a digital multimedia player having a closed caption insertion device.

Recently, development of a device capable of reproducing video and audio data in a digital format has been actively developed. Representative examples include digital multimedia devices capable of playing digital video files of MPEG Audio Layer-3 (MP3) player, Motion Picture Experts Group 2 (MPEG 2) or MPEG 4 compression method. For example, when a movie file is played by the digital multimedia player, if the so-called subtitle file is included in the movie file, the digital multimedia player has a function of displaying a subtitle on the screen.

Referring to Figure 1 will be described the subtitle processing of the conventional digital multimedia player as follows. The conventional digital multimedia player includes a portion 30 that separates and decodes input video and audio signals (A / V data) and a portion of the subtitle processor 50 that extracts subtitles from the input subtitle data. The caption processor 50 extracts a caption from the input caption data, and the extracted caption signal is sent to the graphic processor 90. The caption signal is converted into a graphic signal by the graphic processor 90, and the graphic signal is sent to the video processor 70 to overlay the caption on the existing video and audio signals in graphic form. If the user selects the caption viewing in the user interface 100, the graphic processor 90 overlays the graphic signal of the caption on the video signal, and thus the caption is in the form of a graphic in the built-in monitor 150 or an external device (eg TV) ( 132). In addition, if the user does not select to view the subtitles, the subtitles are not overlaid on the existing graphic signal, and thus only the video and audio signals without the subtitles are output from the built-in monitor 150 or the external device 132.

However, the caption processing of the conventional multimedia player has the following problems.

When processing a subtitle with a conventional multimedia player, the subtitle signal is superimposed on the video signal and displayed on the screen in a graphic form only when the user selects to display the subtitle. Therefore, if the multimedia is played back without storing the subtitle on the playback screen for the purpose of storing the input signal and stored through the external device 132, the subtitle is included in the output video signal. Will not be included. That is, there is a problem in that the subtitles cannot be viewed when the video and audio signals output without the subtitles selected are stored through the external device 132 and played back again.

On the contrary, if the video signal is stored in an external device while the subtitles are reproduced together in the form of video on the screen and played back again, the subtitles must be viewed on the screen even if the subtitles do not need to be viewed.

Therefore, when the multimedia player is connected to the external device 132 and the multimedia is stored, the display of the subtitle is determined according to the user's selection when playing the multimedia on the multimedia device. There was a problem that can not be arbitrarily selected.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to encode a closed caption input during multimedia playback and insert it into a vertical blanking interval (hereinafter referred to as a VBI interval), and in an external device. Even if the multimedia is stored and then played again, the present invention is to provide a digital multimedia player that can selectively view the subtitles by controlling the information of the video VBI section.

In order to achieve the above object, the present invention provides an apparatus for encoding a caption data input to the digital multimedia player in a format that can be inserted into the video VBI section after processing the caption data in the subtitle processor; The subtitle encoding apparatus provides a digital multimedia player comprising an inserter for inserting encoded subtitle data into a VBI section of an input video signal. Preferably, the digital multimedia player includes a user interface capable of turning on / off an apparatus for encoding an input caption file and an apparatus for inserting into a video VBI section. Digital multimedia players also include some digital multimedia players such as PMP (Portable Multimedia Player) and DivX series players.

Referring to Figure 2, the flow of subtitle processing of the multimedia player according to the present invention will be described. The digital multimedia player of this embodiment separates the video and audio signals from the multimedia file and decodes them as in the prior art. However, after the caption data passes through the caption processor 50, an apparatus for encoding the processed caption data into a video VBI section and an apparatus for inserting the encoded caption data into the video VBI section 55 Is added. The encoding device and the insertion device may be physically one device or may be separated. In addition, it is preferable to include a user interface 100 that can be turned on / off the closed caption encoding and insertion apparatus, the conventional user interface 100 for controlling the subtitle processor of the closed caption encoding and insertion apparatus It is more desirable to add an ON / OFF control function.

The flow of processing caption data in the multimedia player to which the proposed devices are added is as follows.

When the user selects the encoding function of the caption data through the user interface 100, the caption processor 50 extracts the caption signal from the input caption file. The caption signal is inputted to the closed caption encoding and inserting device 55 and encoded in a format for insertion into a video VBI section. Preferably, the caption signal of EIA-608 (hereinafter referred to as Electronic Industries Association-608: hereinafter referred to as EIA-608). It is encoded in the format. The encoding signal is inserted into the video VBI section in accordance with timing information for simultaneously displaying the closed caption with a related video and audio signal through the closed caption inserter.

The video and audio signals in which the closed captions are inserted are output to the outside, and the closed captions can be selectively viewed by a device (for example, a TV) having a closed caption decoder.

In addition, the encoding function and the insertion function are controlled through the user interface 100. Therefore, when the apparatus according to the present invention is implemented in a device equipped with both a video output terminal 130 and a built-in monitor 150, whether the subtitle processed by the graphic processor 90 is displayed on the built-in monitor. It is determined whether or not. When the closed caption encoding and inserting device is operated (ON) to play multimedia and store it in the external device 132, it is determined whether the closed caption encoded in the video VBI section can be displayed as a video output. ) May be selected.

When implemented in a device having only the video output terminal 130 without the built-in monitor 150, the closed captions and graphics are processed according to whether the graphics processor 90, the closed caption encoder and the insertion device 55 are turned on or off. It is possible to select to display all the subtitles, display only the inserted closed captions, display only the processed subtitles, or both. That is, when both the graphic processor 90, the closed caption encoder, and the inserting device are turned on in the multimedia player, both the closed caption and the graphic subtitle inserted by the external device 132 may be displayed. When only the graphic processor is turned on in the multimedia player or only the closed caption encoder and the insertion device are turned on, the external device 132 may display only the graphic subtitle or only the closed caption. In addition, when the graphic player, the closed caption encoder, and the insertion device are all turned off in the multimedia player, the external device 132 does not display both the graphic subtitle and the closed caption.

Effects of the digital multimedia player according to the present invention described above are as follows. If a closed caption is encoded and inserted into a video VBI section in a multimedia player, the closed caption can be selectively viewed even if the external device stores and replays the closed caption.

Claims (5)

delete A caption processor for extracting caption data from the received multimedia data; An encoder capable of encoding caption data extracted by the caption processing device; An inserter capable of inserting subtitle data encoded by the encoder into a vertical blanking interval of a video signal; And And a user interface configured to receive control signals for the encoder and the inserter, and to control whether to encode the caption data of the encoder and whether to insert the caption data of the inserter. The method of claim 2, The digital multimedia player is any one of a portable multimedia player (PMP) and a divX player (player). A caption processor for extracting caption data from the received multimedia data; An encoder capable of encoding caption data extracted by the caption processing device; An inserter capable of inserting subtitle data encoded by the encoder into a vertical blanking interval of a video signal; A graphic processor for converting the caption data extracted by the caption processor into a graphic signal; And And a user interface for controlling whether the encoder encodes the caption data, whether the inserter inserts the caption data, and whether the graphics processor converts the caption data. The method of claim 4, wherein The digital multimedia player is any one of a portable multimedia player (PMP) and a divX player (player).

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