KR20060106515A - Apparatus and method of reproducing audio-visual data with function of controlling subtitle area - Google Patents

Abstract

The present invention relates to an AV playback apparatus and a playback method that provide an effective subtitle area control function. The AV playback apparatus according to the present invention includes a user interface for setting selection information for controlling the output of a text-based subtitle out of the caption area, and an output of the text-based subtitle out of the caption area based on the set selection information. And a caption processing unit for controlling the format. Accordingly, a function of processing various subtitle areas according to a user's selection is provided, and even when a user arbitrarily enlarges and edits the size of a subtitle character, all of the subtitles can be output without being shown.

Description

AV playback device and method for providing subtitle area control {Apparatus and method of reproducing audio-visual data with function of controlling subtitle area}

1A and 1B illustrate a problem of the conventional text-based subtitle processing method.

2 shows an example of the structure of an AV playback apparatus providing a caption area control function according to the present invention.

3 illustrates an example of a UI screen for controlling a caption area according to the present invention.

4A to 4C illustrate various embodiments of a subtitle region control method according to the present invention.

5 is a flowchart of an AV playback method for providing a caption area control function according to the present invention.

6A and 6B are detailed flowcharts of an AV reproduction method for providing a caption area control function according to the present invention.

The present invention relates to the reproduction of moving image data, and more particularly, to an AV reproducing apparatus and a reproducing method for providing a caption area control function.

Recently, with the development of multimedia technology, development of high capacity and high density optical discs is in progress. In particular, high-density Blu-ray Disc of 27GB or more is the most representative example. Blu-ray discs provide text-based subtitle data to provide subtitles.

The bitmap-based subtitle method used in conventional DVD discs has a disadvantage in that the caption data is implemented as an image and its size is very difficult to edit. In the text-based subtitle, on the other hand, the caption data is implemented in a character code and a font. Accordingly, in the case of a scalable font in which the font data is composed of vector information, the user can increase or decrease the font in a manner desired by the user to output the subtitle on the screen. As such, the text-based subtitle method has a small size of the subtitle data so that it can be distributed by downloading through the Internet, and the subtitle data can be easily edited.

However, the text-based subtitle method developed to date has the following problems. 1A and 1B illustrate a problem of the conventional text-based subtitle processing method.

According to a text-based subtitle processing method recorded on a Blu-ray disc, a caption area is first designated, and caption characters are output within the designated caption area. In the case of FIG. 1A, the case where a new line of caption is out of the caption area is shown in FIG. 1A. In FIG. 1B, the caption content is out of the caption area when the caption is processed without line breaks. have. As such, when the user arbitrarily enlarges the size of the caption text, the caption data may be out of the designated caption area. That is, a problem arises in that subtitle data outside the subtitle area is not output to the screen and a part of the subtitle is cut off.

SUMMARY OF THE INVENTION The present invention has been made in an effort to solve the above problems, and an object of the present invention is to provide an AV reproducing apparatus and a reproducing method that provide effective caption area control.

According to the present invention, the above technical problem includes: a user interface for setting selection information for controlling output of a text-based subtitle out of a caption area; And a caption processing unit for controlling the output format of the text-based subtitle out of the caption area based on the selected selection information.

The user interface is a user setting menu, and the user setting menu includes a line feed menu item for controlling the output of the text based subtitle outside the caption area, and the caption processing unit displays the text based subtitle when the menu item is set. It is desirable to add line break information to the output format.

In addition, the user setting menu includes an automatic letter size adjustment menu item for a subtitle area for controlling the output of a text based subtitle outside the subtitle area, and the subtitle processing unit includes a text based subtitle when the menu item is set. It is preferable to adjust the font of the caption character in the output format according to the caption area.

Also, the user setting menu includes a forced output menu item outside the caption area for controlling the output of the text-based subtitle outside the caption area, and the caption processing unit includes a text-based sub regardless of the caption area when the menu item is selected. It is preferable to output the title without changing the output format.

In addition, it is particularly preferable that the user setting menu can be selected by combining a line feed menu item, an automatic font size adjustment menu item in accordance with the caption area, and a forced output menu item outside the caption area.

On the other hand, according to another field of the present invention, the above technical problem, the step of setting the selection information for controlling the output of the text-based subtitle out of the subtitle area; And controlling the output format of the text-based subtitle outside the subtitle area based on the selected selection information.

In the controlling step, when the line break function of the selection information is set, it is preferable to add line break information to the output format of the text-based subtitle.

In the controlling step, when the automatic letter size adjustment function is set according to the subtitle area among the selection information, it is preferable to adjust the font of the subtitle letter among the output formats of the text-based subtitle to the subtitle area.

In the controlling step, when the forced output function outside the caption area is set among the selection information, it is preferable to output the text-based subtitle without changing the output format regardless of the caption area.

It is particularly preferable to set the selection information by combining a line break function, an automatic character size adjustment function according to the subtitle area, and a forced output function outside the subtitle area.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 shows an example of the structure of an AV playback apparatus providing a caption area control function according to the present invention.

Referring to FIG. 2, an AV playback apparatus according to the present invention includes an AV stream playback unit 10, a caption stream parser 20, a caption area processing unit 22, a caption output formatter 24, and a font renderer 26. do. The AV stream reproducing unit 10 receives an AV stream, which is moving image data, decodes the AV stream, and outputs the decoded audio and video screens, respectively. The subtitle stream parser 20 receives and parses a subtitle stream which is text-based subtitle data according to the present invention, and decodes the parsed text-based subtitle data into character code and font information. do. The caption area processor 22 receives control information for caption area processing from a user interface (not shown) and applies the control information to the decoded caption data. That is, by controlling the output format of the subtitle by applying the control information for processing the subtitle area, it is controlled so that the subtitle data that is out of the subtitle area is appropriately output. A detailed method of converting an output format of a caption by applying control information for caption region processing will be described later. The subtitle output formatter 24 applies the converted output format to the decoded subtitle data to adjust the output format of the subtitle, and the font renderer 26 refers to the subtitle data to which the adjusted output format is applied to the font data corresponding to the specified font. To convert it to a bitmap. This process is called rendering. The rendered caption data is blended with the video screen output from the AV stream playback unit 10 and displayed as one video and caption screen.

3 illustrates an example of a UI screen for controlling a caption area according to the present invention.

Referring to FIG. 3, an example of a user interface screen for allowing a user to set a processing method in a case where an AV subtitle to be output is out of a subtitle area is shown in the AV playback apparatus according to the present invention. First, a user may select whether to use a caption area processing function through a user interface screen. When the caption area processing function is set to OFF, all remaining options are automatically set to off. When the subtitle area processing function is set to ON, when the subtitle to be output is out of the subtitle area, the user 1) whether or not to wrap the text, 2) whether to force output outside the subtitle area, 3) the subtitle You can choose whether or not to automatically adjust the font size to fit the area. In this case, each function may be used in combination with at least one. However, 1) and 2), or 1) and 3) may be selected in duplicate, but 2) and 3) may not be selected in duplicate. Control information for caption region processing is automatically generated according to the user's selection information, and the control information is transmitted to the caption region processor 22 and applied to the decoded caption data.

4A to 4C illustrate various embodiments of a subtitle region control method according to the present invention.

FIG. 4A shows a method of processing a caption area when the above-mentioned 1) automatic line wrapping process is set to ON. When the user arbitrarily enlarges the caption, when the caption data leaves the caption area, line break control information is added to the output format of the caption so as to automatically wrap as shown in FIG. 4A.

On the other hand, Fig. 4B shows a method of processing a caption area when setting whether to force output outside the caption area 2) described above. When the user arbitrarily enlarges the caption, as shown in FIG. 4B, the caption is output as it is outside the caption area even when the caption data is out of the caption area.

On the other hand, Fig. 4C shows a method of processing a caption area in the case where ON is set whether or not the font size is automatically adjusted in accordance with 3) the caption area described above. When the user arbitrarily enlarges the caption, when the caption data leaves the caption area, the font size of the caption is automatically adjusted to fit the caption area as shown in FIG. 4C.

As a method of adjusting the text size of a subtitle, various existing text size adjusting algorithms may be used. For example, reduce the font size by half to see if it is in the subtitle area, and if it is in the subtitle area, increase the font size gradually. A way to get there may be used.

The following describes an AV playback method that effectively provides a caption area control function according to the present invention based on the structure and user interface of the AV playback apparatus described above. 5 is a flowchart of an AV playback method for providing a caption area control function according to the present invention.

Referring to FIG. 5, when a user sets control information for caption area processing through the above-described user interface, the AV playback apparatus according to the present invention checks control information on whether to use the caption area processing function (200). step). If the check result is set to OFF, the subtitle is processed according to the general subtitle stream processing method without using the subtitle area processing function (step 202).

If the subtitle area processing function is set to ON, as described above, 1) whether to wrap the text, 2) whether to force output outside the subtitle area, or 3) automatically adjust the font size to match the subtitle area. The caption area is processed in accordance with control information on whether to adjust or not.

That is, when the caption area processing function is set to ON, control information on whether to use the word wrapping function is checked (step 204). If the check result is set to ON, the line break information is added to the subtitle output format (step 206). Next, if the subtitle to be output is out of the subtitle area regardless of whether the line break function is used, check the control information on whether to force output outside the subtitle area and to automatically adjust the font size to fit the subtitle area. The subtitle area is processed according to the control information (step 208).

More specifically, FIGS. 6A and 6B are detailed flowcharts of an AV reproduction method for providing a caption area control function according to the present invention.

6A and 6B, the text-based subtitle data to be output is read line by line (step 220), and control information on whether to use the caption processing function is checked (step 222). If you do not use the caption processing function, read the next line of the text-based subtitle to output and repeat the same process. On the other hand, if you are using the caption processing function, check the control information about whether to use the line break function (step 224), and if the caption of the line is out of the subtitle area when using the line break function, Automatically add to output format information (step 226).

Next, when the subtitle to be output is out of the subtitle area (step 230), the control information for processing the subtitle area is checked (step 232), and if the forced output function is set to ON, the forced subtitle is output outside the area. The control information is reset (step 234), and if the auto adjustment function is set to ON, the font of the subtitle character is readjusted so that the height / width of the subtitle data to be output matches the height / width of the subtitle area (236). step). In operation 238, the caption is converted into a bitmap through the caption output formatter 24 and the font renderer 26 according to the reset output format.

On the other hand, the AV reproduction method for providing a caption area control function according to the present invention can be created by a computer program. Codes and code segments constituting the program can be easily inferred by a computer programmer in the art. In addition, the program is implemented in an AV playback method that is stored in a computer readable media and is read and executed by a computer to provide a caption area control function. The information storage medium includes a magnetic recording medium, an optical recording medium, and a carrier wave medium.

So far I looked at the center of the preferred embodiment for the present invention. Those skilled in the art will appreciate that the present invention can be implemented in a modified form without departing from the essential features of the present invention. Therefore, the disclosed embodiments should be considered in descriptive sense only and not for purposes of limitation. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the scope will be construed as being included in the present invention.

As described above, according to the present invention, there is provided an AV playback apparatus and a playback method that provide an effective caption area control function.

The conventional text-based subtitle method does not provide a function of processing a subtitle area according to a user's selection, so that when the user arbitrarily enlarges the size of the subtitle character, the subtitle data is out of the designated subtitle area, and the subtitle data outside the subtitle area. There was a problem that part of the subtitle is cut off because it is not displayed on the screen.

However, according to the present invention, a function of processing various subtitle areas according to a user's selection is provided. That is, when the user arbitrarily enlarges and edits the size of the subtitle text, even if the subtitle data is out of the subtitle area, the text is wrapped, the font size is automatically adjusted according to the subtitle area, or the subtitle area is forcibly output outside the subtitle area. Can be controlled. Accordingly, all of the subtitles can be displayed on the screen without being visible.

Claims (10)

A user interface for setting selection information for controlling the output of the text-based subtitle leaving the caption area; And And a caption processing unit for controlling an output format of the text-based subtitle out of the caption area based on the set selection information. The method of claim 1, The user interface is a user setting menu, The user setting menu includes a line break menu item for controlling the output of the text-based subtitle outside the caption area. And the caption processing unit adds line break information to an output format of the text-based subtitle when the menu item is set. The method of claim 1, The user interface is a user setting menu, The user setting menu includes an automatic letter size adjustment menu item for a subtitle area for controlling the output of a text-based subtitle outside the subtitle area. And the caption processing unit adjusts a font of a caption character in an output format of the text-based subtitle according to the caption area when the menu item is set. The method of claim 1, The user interface is a user setting menu, The user setting menu includes a forced output menu item outside the subtitle area for controlling the output of the text-based subtitle outside the subtitle area, And when the menu item is selected, the caption processing unit outputs the output format of the text-based subtitle without being converted, regardless of the caption area. The method according to any one of claims 2 to 4, And the user setting menu can be selected by combining the line feed menu item, the automatic font size adjustment menu item in accordance with the caption area, and the forced output menu item outside the caption area. Setting selection information for controlling the output of the text-based subtitle outside the caption area; And And controlling the output format of the text-based subtitle out of the caption area based on the set selection information. The method of claim 6, The controlling may include adding line break information to an output format of the text-based subtitle when the line break function is set among the selection information. The method of claim 6, The controlling may include adjusting a font of a caption character in an output format of the text-based subtitle according to the caption area when the automatic character size adjustment function is set according to the caption area in the selection information. The method of claim 6, The controlling may include outputting the output format of the text-based subtitle without changing the output format regardless of the caption area when the forced output function is set out of the caption area. The method according to any one of claims 7 to 9, The setting of the selection information may be performed by combining the line feed function, the automatic character size adjustment function in accordance with the caption area, and the forced output function outside the caption area.

Images