KR20010047071A - apparatus and method for display of font data broadcasting - Google Patents

Abstract

PURPOSE: An apparatus and method for displaying a font for a data broadcasting is provided for a user to read a character easily by searching various mode of a data broadcasting and designating and displaying a font for having a semi-transparency background in accordance with each mode. CONSTITUTION: If a digital broadcasting signal is received from the exterior(S10), the contents of the received HTML document are analyzed by parsing a data signal thereof(S20). A display mode is detected using the analyzed result(S30). If a broadcasting watched in current is included in the HTML document or in the case of a mode for displaying only general HTML information, the transmitted font is displayed on a screen using general fonts(S70). If a broadcasting watched in current is used as a background, a color of the transmitted font is searched(S40). If a font background color is not designated, a font having a semi-transparency background is created using a color contrasted to the searched font color(S50). If a font background color is designated, a font is created by converting the designated background into a semi-transparency(S50). If a font color and a padding color are fixed, a color of the background area is decided using a font color and a padding color, and the font having a semi-transparency background is created(S60). If a padding color is not designated, the semi-transparency background is decided based on a font color contrasted to the searched font color. The font is displayed on a screen(S80).

Description

Apparatus and method for display of font data broadcasting}

The present invention relates to digital broadcasting, and more particularly, to a font display apparatus and method for data broadcasting.

In digital broadcasting, video and audio streams are compressed into digital information, and system information and program information are compressed and broadcast in accordance with the Program and System Information Protocol (PSIP) standard.

At this time, the information related to the broadcast program is decoded from data other than the video and audio information, and the program related information is displayed on the screen and informed to the user through an electronic program guide (EPG).

In addition, the PSIP defines an electronic program guide (EPG) and system information as one, and is a standard of ATSC for terrestrial and cable digital broadcasting. It is a MPEG-2 (Moving Picture Experts Group; ISO / IEC 13818-1 system). It is defined to provide various information about the program by parsing the messages encoded by the method of (). (1997 DEC. Document A / 65).

That is, the PSIP transmits and receives A / V data made in MPEG-2 video and AC-3 audio format, and transmits information about channels of each broadcasting station and information about each program of channels. Consists of.

As such, the PSIP supports a main function of selecting a channel and providing an A / V service of a desired broadcast and an EPG of a broadcast program, that is, an additional function of providing a broadcast guide service.

At this time, channel information for channel selection and packet identification number (PID) for receiving A / V are transmitted through a virtual channel table (VCT), and EPG information of broadcast programs of each channel is EIT ( Each event is transmitted through the Event Information Table.

Currently, as a text service of analog broadcasting, a limited text service using VBI (Vertical Blank Interval) is used. In digital broadcasting, a wider range of services are used as an enlarged concept.

In addition, although some broadcasters are currently conducting test text broadcasting using VBI in analog broadcasting, terminals supporting them are limited to TV receiving cards of PCs.

Digital TVs, which will be commercialized in the future, basically include their own processors, memory, etc., so that the data broadcasting will be highlighted as a big difference between the digital broadcasting and the existing analog broadcasting.

One of the ways to enable users to search for such additional information service is the TV-URL implementation method, which refers to the TV implementation method defined in the HTML grammar.

The TV-URL is defined by the Internet Engineer Task Force (IETF), which is embodied by the Advanced TeleVision Enhancement Forum (ATVEF) to express the TV-URL in an HTML document, and is also shown in the ATVEF specification.

When looking at the digital TV (DTV) S / W (Software) specification such as ATVEF, there is a TV-URL mode, and among the types of TV-URL, a mode for displaying graphics (including characters) in the background of a TV screen is provided. have.

There are two main modes for displaying such a data broadcast. The first is to display general HTML only or to display a TV screen as an image in an HTML page.

The second is when the contents (characters) of HTML are displayed on the TV screen in the background.

At this time, when the color of the TV screen is similar to the color of the characters, it becomes difficult for the viewer to read the displayed HTML characters.

As described above, the font display method for data broadcasting according to the related art has the following problems.

When data broadcasting is displayed on a digital TV, a TV screen and a data broadcasting screen overlap each other. When the color arrangement between the font and the TV screen serving as the background is similar, it is difficult for the viewer to read the characters. Have.

Accordingly, the present invention has been made to solve the above problems, and by searching for various modes of data broadcasting, by designating and displaying a font (font) to have a translucent background on the characters according to each mode, viewers can easily display the characters Its purpose is to make it readable.

1 is a block diagram of a font display apparatus for data broadcasting according to the present invention;

2 is a flowchart of a font display method for data broadcasting according to the present invention.

3 is a view showing a data broadcasting font according to the present invention;

4 is a diagram showing a general data broadcasting font;

* Explanation of symbols for main parts of the drawings

10: receiver 20: A / V decoder

30: display unit 40: parsing unit

50: format section 60: decoder section

A feature of the font display apparatus for data broadcasting according to the present invention for achieving the above object is a receiver for receiving digital broadcast having data and A / V signal, and decoding the broadcast signal by detecting the A / V signal at the receiver. A digital broadcast receiver comprising an A / V decoder unit and a display unit for displaying a broadcast signal of the A / V decoder unit, the digital broadcasting receiver comprising: a parser configured to analyze data content using an HTML document output from the receiver; And a format unit for converting the font into a font having a translucent background area and outputting it to the display unit.

A feature of the font display method for data broadcasting according to the present invention for achieving the above object is a parsing step of analyzing the content of the HTML document of the digital broadcast signal received from the outside, and checking the display mode using the parsing result A search step of searching for a color of the transmitted font when the broadcast currently being viewed is used as a background in the inspection step, a generation step of generating a font having a translucent background with a color contrasted with the searched font color; And a display step of displaying the generated font on a screen.

An operation according to an aspect of the present invention is a technique for displaying data on a screen during data broadcasting, and when displaying data on a TV background, it is possible to improve the readability of the data by adding a semi-transparent background area to the data area.

Other objects, features and advantages of the invention will become apparent from the following detailed description of embodiments taken in conjunction with the accompanying drawings.

A preferred embodiment of a data broadcasting font display apparatus and method according to the present invention will be described with reference to the accompanying drawings.

1 is a block diagram of a font display apparatus for data broadcasting according to the present invention.

Referring to FIG. 1, a receiver 10 for receiving a digital broadcast having data and an A / V signal, an A / V decoder 20 for detecting an A / V signal from the receiver 10 and decoding the A / V signal into a broadcast signal; And a display unit 30 for displaying a broadcast signal of the A / V decoder unit 20, a parser 40 for analyzing data content using an HTML document output from the receiver 10, and the parsing unit. A format unit 50 for checking a display mode based on the data content analyzed by the unit 40, converting the font into a font having a translucent background area, and outputting the converted font to the display unit 30, and an image input to the format unit 50. The decoder unit 60 decodes a file and an audio file and outputs the decoded file to the display unit 30.

Referring to the operation of the font broadcasting apparatus for data broadcasting according to the present invention configured as described above, the receiving unit 10 decodes the A / V signal among the data and A / V signals which are received from the outside into a signal suitable for the broadcast signal and displays the same. Displayed in the unit (30).

The data is separately detected by the receiver 10 and analyzed by the parser 40.

In this case, the analysis method analyzes the data content using each tag of the HTML document input to the parser 40.

The display unit 30 determines the display method using the analyzed data content and displays the display method on the display unit 30.

Next, a font display method for data broadcasting according to the present invention configured as described above will be described in detail with reference to the accompanying drawings.

2 is a flowchart of a font display method for data broadcasting according to the present invention.

Referring to FIG. 2, first, when a digital broadcast signal is received from the outside (S10), the data signal is parsed and the contents of the received HTML document are analyzed (S20).

The display mode of the received data is checked using the analysis result (S30).

At this time, there are two methods of inspecting the display mode.

First, when a broadcast station displays a display mode, it can detect the font type.

Second, in the case of the TV-URL mode of ATVEF, there is a tag that shows whether the TV is in the background mode, so that the font type can be selected by searching for it.

As described above, in the display mode check (S30), when the broadcast currently being viewed is included in the HTML document or in the mode of displaying only general HTML information, the font transmitted using the general font is displayed on the screen as it is (S70).

In the display mode check (S30), when the broadcast currently being viewed is used as the background, the color of the transmitted font is searched to determine the background color of the data character area (S40).

In general, the font color is specified by the content creator or, if not specified, the default value of black is used.

The background color of the font can also be specified by the content creator, using a style sheet to specify the color of the padding area occupied by the text.

The background color is also transparent by default if not specified.

If the font background color is not designated after the color search of the font (S40), a font having a translucent background of a predetermined area is generated as a color contrasted with the found font color (S50).

After searching for the color of the font (S40), if the font background color and area are designated, the font is generated by converting the specified background to be translucent (S50).

Conventionally, when the font background color is specified, the background of the font is formed to be opaque, so that the part of the broadcast screen being viewed is removed. However, in the present invention, the viewer can watch without losing the broadcast screen while searching for data by converting the specified font background color into translucent. Can be.

As described above, when the font color and the padding color are determined by the content producer, the color of the base area is determined using the font color and the padding color, and a font having a semitransparent background is generated using the color (S50).

As such, when the padding color is not specified, the translucent background is determined based on a color contrasted with the font color found in the search (S40), and a font having a translucent background is generated by putting a color in the padding area (S50). .

In operation S80, the screen is displayed using a font having the generated translucent background.

In addition, when the font has a plurality of colors, a font having a translucent background of one color randomly generated is generated.

As described above, by adding a simple S / W operation, the color of the data characters generated when displaying a character string with a TV background on the screen and the TV screen color are similar to prevent readability.

As an example, compare FIG. 3 with FIG.

3 is a diagram showing a data broadcasting font according to the present invention, and FIG. 4 is a diagram showing a general data broadcasting font.

3 and 4, in the case of FIG. 3, a white translucent background color contrasted with the color of the data is added to the periphery of the data, and it is confirmed that the readability is higher than that of FIG. 4 without the background color.

The font broadcasting apparatus and method for data broadcasting according to the present invention as described above have the following advantages.

First, by changing the font and displaying the index translucent background contrasted with the color of the font on the screen, it is possible to solve the problem of difficult to read characters because the color arrangement is similar to that of the data broadcasting search TV screen.

Second, by embedding an outline font, it is possible to prevent the CPU overload caused by raster rising as necessary and the delay of the display due to this.

Third, it is possible to prevent the waste of the double memory that occurs when the display of the two conventionally proposed fonts are embedded.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims.

Claims (5)

A receiver for receiving a digital broadcast having data and A / V signals, an A / V decoder for detecting an A / V signal and decoding the A / V signal into a broadcast signal, and a display for displaying a broadcast signal of the A / V decoder. In the digital broadcast receiver consisting of: A parser configured to analyze data content using an HTML document output from the receiver; And a format unit for inspecting a display mode based on the data content analyzed by the parser, converting the display mode into a font having a semi-transparent background area, and outputting the converted font to the display unit. The method of claim 1, And a decoder configured to decode the image file and the audio file input to the format unit and output the decoded image file to the display unit. A parsing step of analyzing the content of an HTML document among digital broadcast signals received from the outside; Inspecting a display mode using the parsing result; A search step of searching for a color of the transmitted font when the currently viewed broadcast is used as a background in the checking step; A generating step of generating a font having a translucent background with a color contrasted with the retrieved font color; And a display step of displaying the generated font on a screen. The method of claim 3, wherein And displaying the transmitted font as it is on the screen when the broadcast currently being viewed in the checking step is included in the HTML document or in the mode of displaying only general HTML information. The method of claim 3, wherein And generating a font having a translucent background of a designated color when the font has a plurality of colors.