KR100428603B1 - Method for displaying graphic data in the digital television - Google Patents

Abstract

The present invention relates to a method for displaying a graphic screen of digital broadcasting even when terrestrial broadcasting is received in a digital TV that receives and displays analog broadcast signals and digital broadcast signals. When the mode is switched, receiving and converting an analog broadcast signal into a digital broadcast signal and displaying the converted analog broadcast signal through a processing path for the digital broadcast signal, and graphic information of the digital broadcast while displaying the analog broadcast signal. If a key signal for displaying the digital signal is input, extracting the additional information and the graphic information for the digital broadcast, and then mixed with the analog broadcast signal converted into a digital broadcast signal to display the graphic of the digital TV The processing performance can be improved.

Description

TECHNICAL FOR DISPLAYING GRAPHIC DATA IN THE DIGITAL TELEVISION

The present invention relates to a digital TV, and more particularly, to a digital TV graphic information display method suitable for more efficiently displaying graphic information in a digital TV that can accommodate an analog terrestrial broadcast signal and a digital terrestrial broadcast signal.

In recent years, there has been a growing interest in digital broadcasting (terrestrial, cable or satellite digital broadcasting), which provides much clearer image and sound quality compared to analog broadcasting, and some areas are piloting or planning to implement digital broadcasting. Doing. Therefore, the spread of digital TV that can cope with such digital broadcasting is rapidly spreading.

On the other hand, in addition to the advantages of providing high-quality video and sound, digital broadcasting may be a significant advantage of the dramatic improvement of the user interface using additional digital service data transmission and graphics. That is, the digital TV provides a convenient user interface using a graphical user interface (GUI). To this end, various types of menu screen data required for the user interface are stored in the digital TV.

The menu screen includes a menu screen (for example, a program guide menu screen) configured by inserting program guide information received through a transmission channel into a prepared menu box, and a menu having only selection items for user selection. Various types of menu screens are included to maximize the convenience of the screen and the user interface.

However, in the conventional general digital TV as described above, each signal processing path is selectively driven according to the type of the input broadcast signal by separately providing a processing path for the digital terrestrial broadcast signal and a processing path for the analog terrestrial broadcast signal. Therefore, a menu screen provided only in the digital terrestrial broadcast signal exists. In other words, there is a problem in that a graphic information screen (including various menu screens) provided in the digital broadcasting mode cannot be displayed while a signal for an analog broadcasting channel is received and displayed in the digital TV as described above.

Accordingly, the present invention has been made to solve the above-mentioned problems, the digital TV graphic that can display a digital graphic screen when watching the terrestrial broadcast in a digital TV that can receive analog terrestrial broadcast signal and digital terrestrial broadcast signal The purpose is to provide a method of displaying information.

In order to achieve the above object, the present invention includes a path for processing an analog broadcast signal and a path for receiving and processing a digital broadcast signal to convert the analog broadcast signal into a digital broadcast signal, and a plurality of additions embedded in the digital broadcast signal. A graphic information display method of a digital TV for storing and displaying information and graphic information, wherein when the broadcasting mode of the digital TV is switched to an analog broadcasting mode, an analog broadcasting signal is received and converted into a digital broadcasting signal using a signal converting means. A first step, a second step of displaying the converted analog broadcast signal through a processing path for the digital broadcast signal, and a key signal for displaying graphic information for the digital broadcast while the analog broadcast signal is being displayed, Digital broadcasting A third step of extracting additional information and graphic information inserted into the call; and a fourth step of mixing and displaying the extracted additional information and graphic information with an analog broadcast signal converted into a digital broadcast signal. Provide a display method.

1 is a block diagram showing a configuration of a digital TV suitable for applying a method for displaying graphic information of a digital TV according to an embodiment of the present invention;

2 is a flowchart illustrating a process of displaying graphic information of a digital TV according to a preferred embodiment of the present invention.

<Description of the code | symbol about the principal part of drawing>

10: first tuner unit 20: demultiplexer and control unit

30 memory unit 40 second tuner unit

50: A / D converter 60: MPEG decoder

70: D / A converter

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

1 is a diagram illustrating a configuration of a digital TV suitable for applying a graphic information display method according to an exemplary embodiment of the present invention. The first tuner 10, the demultiplexer and the controller 20, and a memory unit ( 30), a second tuner unit 40, an A / D converter 50, an MPEG decoder 60, and a D / A converter 70.

Referring to the same figure, the first and second tuner unit 10 tunes the digital terrestrial broadcast signal and provides the demultiplexer and the control unit 20, and the demultiplexer and the control unit 20 provides the digital terrestrial broadcast signal. A video signal, an audio signal, and various additional information data are separated and output.

In this case, the graphic information including various additional information is stored in a predetermined area of the memory unit 30, and the memory unit 30 is a graphic screen including pre-stored menu screen information and various additional information under the control of the control unit 20. Information is again provided to the control unit 20.

In particular, the demultiplexer and the control unit 20 are stored in the memory unit 30 in response to a key signal for displaying various graphic information screens based on an external operation signal while receiving and displaying an analog broadcast signal according to the present invention. After extracting the graphic information serves to the MPEG decoder 60.

The MPEG decoder 60 decodes and outputs a video signal, an audio signal, and various graphic information input from the demultiplexer and the controller 20, and in particular, the graphics from the demultiplexer and the controller 20 during the digital terrestrial broadcast mode. When the information is provided, it is mixed with the video signal and provided to the D / A converter 70.

The D / A converter 70 converts the video signal output from the MPEG decoder 60 into an analog broadcast signal and displays it on a screen through a display unit (not shown).

Meanwhile, the MPEG decoder 60 described above decodes and outputs an analog broadcast signal output from the A / D converter 50, which will be described later, even when the overall operation of the digital TV operates in the analog broadcast mode. In this case, when the graphic information is provided from the demultiplexer and the controller 20, the MPEG decoder 60 mixes the video signal of the analog broadcast signal and the graphic information screen and outputs it to the outside.

The second tuner 40 tunes the analog terrestrial broadcast signal received from the outside and provides the tuned analog broadcast signal to the A / D converter 50.

The A / D converter 50 converts the tuned analog broadcast signal into a digital broadcast signal and provides the same to the MPEG decoder 60 described above. That is, the A / D conversion unit 50 is the second tuner unit 40 in order to mix and output the analog terrestrial broadcast signal with graphic information including menu screen information and various additional information stored in the memory unit 30. And converts the analog terrestrial broadcast signal tuned into the digital broadcast signal.

2 is a flowchart illustrating a process of displaying graphic information of a digital TV according to an exemplary embodiment of the present invention. Referring to the drawings, the present invention will be described in detail below.

While the overall operation of the digital TV configured as shown in FIG. 2 operates in the standby power state or the digital broadcast mode for receiving and displaying the digital terrestrial broadcast signal (step 201), a key signal for receiving the analog terrestrial broadcast signal is When the digital TV operation mode is switched to the analog broadcast mode (step 203), the analog terrestrial broadcast signal is received through the analog terrestrial broadcast signal receiver (not shown) (step 205), and the second tuner 40 The broadcast signal of a predetermined channel is tuned and output.

Then, the tuned broadcast signal is converted into a digital broadcast signal through the A / D converter 50 (step 207), so as to process the digital terrestrial broadcast signal, that is, the MPEG decoder 60 and the D / A converter 70. After a predetermined signal processing process through a) is displayed on the monitor not shown (step 209).

During the terrestrial broadcast mode in which the analog terrestrial broadcast signal is received and displayed through the above-described process, when a key signal for displaying various menu screens and graphic information used in digital terrestrial broadcast is input (step 211), the demultiplexer and The control unit 20 extracts graphic screen information corresponding to the input key signal from the memory unit 30 and provides it to the MPEG decoder 60 together with a control signal for screen mixing (step 213).

Then, the MPEG decoder 60 mixes the graphic information with the digitized analog broadcast signal provided from the A / D converter 50 based on the control signals provided from the demultiplexer and the controller 20 to perform D / A conversion. In step 215, the D / A converter 70 converts the analog broadcast signal into an analog broadcast signal and provides it to the display unit (not shown).

Therefore, the video screen of the analog terrestrial broadcast signal and the graphic screen of the digital terrestrial broadcast signal are mixed and displayed (step 217), so that the digital terrestrial broadcast graphic information can be displayed even while receiving the analog terrestrial broadcast.

As described above, according to the present invention, a digital TV capable of receiving a digital terrestrial broadcast signal and an analog terrestrial broadcast signal can display an additional information screen and a graphic screen for digital broadcasting in an analog terrestrial broadcast mode, thereby processing a graphic screen of a digital TV. There is an effect that can improve the performance, thereby to meet the needs of a wider variety of users.

Claims (1)

A path for processing an analog broadcast signal and a path for processing a digital broadcast signal to convert the analog broadcast signal into the digital broadcast signal, and to store and display a plurality of additional information and graphic information inserted in the digital broadcast signal. In the graphic information display method of the digital TV, A first step of receiving the analog broadcast signal and converting it into a digital broadcast signal through the signal conversion means when the broadcast mode of the digital TV is switched to the analog broadcast mode; Displaying the converted analog broadcast signal through a processing path for the digital broadcast signal; A third step of extracting additional information and graphic information embedded in the digital broadcast signal when a key signal for displaying graphic information on the digital broadcast is input while displaying the analog broadcast signal; A fourth step of mixing and extracting the extracted additional information and graphic information with the analog broadcast signal converted into the digital broadcast signal Graphical information display method of the digital TV comprising a.