KR100631498B1 - Caption window display method for digital television - Google Patents

Abstract

The present invention relates to a method for displaying a caption window of a digital TV. In the related art, since the caption window is only in the form of a box, a reference point is set on the background part close to the speaker so that the caption window can be displayed. In some cases, such as the appearance of a number of people there was a problem that you do not know clearly who the current speaker. Accordingly, the present invention provides a first step of detecting an ID of a reference point from caption window data when a caption service is set; A second step of detecting a direction font graphic font corresponding to the reference point ID; A third step of displaying, in a caption window, a graphic font for displaying a direction corresponding to the detected reference point; By including the fourth step of displaying the caption letters in the direction of the caption window can be clearly pointed to the current speaker has the effect of allowing the hearing impaired and language practitioners to understand the content more quickly.

Description

How to display caption window of digital TV {CAPTION WINDOW DISPLAY METHOD FOR DIGITAL TELEVISION}

1 is an exemplary view of a conventional analog caption display screen.

2 is an exemplary diagram of a conventional digital caption display screen.

3 is an exemplary diagram showing reference point data included in a caption window in FIG.

4 is an exemplary view comparing positions of caption windows according to reference points in FIG. 3.

5 is a block diagram showing the configuration of a general caption data processing apparatus.

Figure 6 is a flow chart showing a conventional caption processing process.

Fig. 7 is an illustration of a graphic font for displaying directions corresponding to each reference point of the caption window.

FIG. 8 is an exemplary view of a caption window in which graphic fonts for displaying directions are additionally displayed in FIG. 7; FIG.

9 is a flowchart showing a caption processing process according to the present invention;

10 is an exemplary view of a screen displaying a caption window oriented in accordance with the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to digital TV technology, and more particularly, to a method for displaying a caption window of a digital TV that enables a speaker to be displayed clearly.

In general, an analog caption displays a caption by inserting a text background as shown in FIG. 1 at the left, center, or right side of a TV screen at the current speaker's position. Recently, a newly appeared digital caption is shown in FIG. As you can see, after setting the window, the caption is displayed in it.

As shown in FIG. 3, there are nine reference points ID0 to ID8 in the caption window, and the position of the caption window is determined based on the reference points.

For example, when the caption window is displayed at the same positions 37 and 105 as shown in FIG. 4, the position where the caption window is displayed according to the set reference point is greatly different.

Here, (a) is a case where a reference point is set to "ID8", and (b) is a case where "ID0" is set as a reference point.

Then, such a conventional caption processing process will be described in more detail with reference to the configuration of the caption data processing apparatus shown in FIG. 5 and the caption processing flowchart shown in FIG. 6.

Once the digital TV receives the MPEG-2 transport stream, the digital TV demuxes the video data and various information data through the MPEG demux 1 shown in FIG.

In this case, the demuxed Program Mapping Table (PMT) packet and the Event Information Table (EIT) packet include caption descriptor information and the like, which is passed through the PMT buffer 2 and the EIT buffer 3, respectively. It is input to the user processor 4.

Accordingly, the user processor 4 determines whether there is a caption service request by a key input by a remote controller or the like from the user, and when there is a caption service request, the user processor 4 outputs GUI screen information stored in the user graphic storage unit 5 to the user. Allows you to select a more detailed caption menu.

Next, when the caption menu is selected (for example, when the caption information transmitted in the MPEG-2 transport stream includes English, French, German, etc.), one of the caption menus is selected. The output GUI screen is turned off, and the selected caption service selection signal is output to the DTV caption player 8.

On the other hand, the video parser 6 receiving the video data demuxed and output from the MPEG demux unit 1 is caption data included in the user data area (in this case, English, French, German The caption data is output to the DTV caption player 8, and the MPEG-2 video data is output to the MPEG2-video decoder 7, respectively. .

Accordingly, the MPEG-2 video decoder 7 decodes the MPEG-2 video stream and outputs it to the video synthesizer 9, and the DTV caption player 8 receives the caption service selection signal input from the user processor 4. By selecting only one of the caption data from the caption data input through the video parser 6 to output to the video synthesizer (9).

Accordingly, the video synthesizer 9 synthesizes caption data to the decoded image data and outputs the caption data to the screen through the video player 10.

Then, the conventional caption processing process will be described again with reference to the flowchart of FIG. 6.

First, it is determined whether the caption service is set in the user menu (ST1), and if it is set, the user data is requested to the video parser 6 (ST2), and only the packet corresponding to the caption data is extracted (ST3). The caption data packet is unpacked and only the caption data corresponding to the currently selected caption service is output.

In this case, the caption data includes all data related to which color caption window is displayed at a certain width and height at which position on the screen.

Accordingly, the caption window is displayed at the position designated by the caption information data (ST6), and the caption character is displayed therein to complete the caption processing. (ST7)

The position of the caption window is displayed by setting a reference point on the background part as close to the speaker as possible. In order to not cover an important background or when several people appear, in some cases, it is obvious to know who the current speaker is. There was a problem that can not occur.

Therefore, the present invention was created to solve the above-mentioned conventional problems, and the digital font for clearly indicating the current speaker by displaying a graphic font for displaying the direction in addition to the caption window according to the reference point of the caption window. Its purpose is to provide a caption window display method for a TV.

According to an aspect of the present invention, there is provided a caption service comprising: a first step of detecting an ID of a reference point from caption window data when a caption service is set; A second step of detecting a direction font graphic font corresponding to the reference point ID; A third step of displaying, in a caption window, a graphic font for displaying a direction corresponding to the detected reference point; And a fourth step of displaying caption letters in the direction-captioned window.

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

First, in the present invention, as shown in FIG. 7, graphic fonts corresponding to nine reference points ID0 to ID8 included in the caption window information are stored, and corresponding fonts are shown according to the position reference point of the actual caption window. As shown in 8, each caption window is displayed.

Then, the caption window display process as described above will be described in more detail with reference to the flowchart of FIG. 9.

First, it is determined whether the caption service is set in the user menu (ST11). If the caption service is set, that is, if the caption is selected in the language of the specific country to be the caption service, the user in the video parser 6 as in the prior art The data is requested (ST12), and only the packet of the part corresponding to the caption data is extracted from the user data. (ST13)

Next, only the caption data corresponding to the currently designated caption service is decoded by decoding the caption data packet (ST14), and information such as a reference point, a position, a width, a height, and a color of the caption window included therein is detected (ST15). Displays the caption window at the position (ST16).

At this time, the graphic font corresponding to the reference point ID of the caption window is extracted from the previously stored graphic fonts (ST17) and displayed in addition to the reference point position of the caption window. (ST18)

Next, the caption processing process is completed by displaying the caption text in the caption window (ST19).

Accordingly, the caption displayed through the above process can clearly indicate the current speaker as shown in FIG.

As described above, the caption window display method of the digital TV of the present invention displays the graphic font for displaying the direction in addition to the caption window according to the reference point of the caption window, so that the current speaker can be clearly indicated so that the hearing impaired person and the language learner It has the effect of making the content quicker to understand.

Claims (1)

Detecting a ID of a reference point from the caption window data when the caption service is set; A second step of detecting a direction font graphic font corresponding to the reference point ID; A third step of displaying, in a caption window, a graphic font for displaying a direction corresponding to the detected reference point; And a fourth step of displaying caption letters in the direction-captioned caption window.

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