KR20100043512A - Apparatus and method for displaying - Google Patents

Abstract

PURPOSE: A video display device and a method thereof are provided to reduce waiting time which is consumed until data broadcasting is completely received, and to easily recognize kinds of service of corresponding data broadcasting. CONSTITUTION: A TP decoder(130) performs a signal process to display an image signal or a data signal which is outputted through a demultiplexer on a display unit. A memory(150) stores the data signal included in a broadcasting signal. A main controller(160) determines whether AIT(Application Information Table) exists in the data signal or not. The main controller determines information about service kinds of the data broadcasting in the AIT.

Description

Image display device and its method {Apparatus and method for displaying}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display apparatus and a method thereof, and to an apparatus and method for easily providing a user with information on the presence or absence of data broadcasting and the type of data broadcasting.

Digital broadcasting means that images and voices are converted to digital transmissions in the conventional analog broadcasting, so that they can enjoy clearer, clearer picture quality and multi-channel sound.

In contrast, data broadcasts provide a variety of functions by adding additional data to digital broadcasts, such as showing upcoming programs and times for all channels, captioning for the hearing impaired, Equipped with a variety of additional functions, such as allowing to remove, or to enable two-way communication to enable shopping during the broadcast.

In such data broadcasting, in particular, the updating process of data broadcasting information according to the ACAP (Advanced Common Application Platform) standard, AIT (Application Information Table) and DSM-CC (Digital Storage Media-Command and Control) data transmitted from the broadcasting station It is automatically updated in real time.

That is, the presence or absence of the current ACAP data broadcast is determined by finding the program number of the program specific information (PSI) corresponding to the program number existing in the Terrestrial Virtual Channel Table (TVCT) for the current channel being viewed. It is updated by determining whether AIT or DSM-CC exists.

Therefore, as shown in FIG. 1, when a specific channel is selected (S101), it is determined whether data broadcast exists (S102, S103), and when a data broadcast key is applied by a user when data broadcast exists (S104). S105), the data broadcast received and updated above is displayed on the screen as shown in FIG. 2 (S106).

At this time, the user can confirm the presence or absence of data broadcasting only for the current broadcasting through the screen shown in FIG.

In the above description, AIT and DSM-CC are data transmitted in a transport stream of a DTV, AIT has data broadcast presence and update information, and DSM-CC is data of actual data broadcast (eg, Picture, font) has control information. In addition, as the TVCT, a virtual channel, A / V PID, and short_name (KBS_D1, MBC) information about a physical channel may be known.

However, the data broadcasting display method according to the related art, as illustrated in FIG. 2, simply informs the user whether or not there is a data broadcast for the current broadcast program. There was a problem in that a program could not be searched and additional information such as a description of the data broadcast could not be provided.

The present invention does not need to waste the waiting time until the reception of the data broadcast in order to confirm the presence or absence of the data broadcast and the service type thereof, and promptly knows the presence or absence of the data broadcast and the service type thereof. An object of the present invention is to propose an apparatus and a method for enabling the same.

The video display device according to the present embodiment is a video display device for receiving a data broadcast signal included in a broadcast signal, comprising: a display unit for displaying a video signal included in the broadcast signal on a screen, and the data broadcast signal. And a control unit for acquiring information on the service type of the data broadcast from the display unit, and displaying a mark corresponding to the acquired service type of the data broadcast on the display unit.

In addition, the video display method of the embodiment, the step of receiving a request for confirmation of the broadcast information; Checking whether AIT information is included in a data signal of a received broadcast signal; Reading information on a service type of data broadcasting described in the AIT information; and displaying on the screen a mark corresponding to the service type of the read data broadcasting.

In addition, the video display device of the embodiment includes a tuner for receiving a broadcast signal, a demultiplexer for demultiplexing a broadcast signal received through the tuner into a video signal, an audio signal, and a data signal, and is output through the demultiplexer. A decoder for performing signal processing so that a video signal or a data signal is displayed on a display, a memory for storing a data signal included in the broadcast signal, and whether an application information table (AIT) exists in the data signal And a controller for determining information on a service type of data broadcasting described in the AIT.

According to embodiments as proposed, when the user confirms the data broadcast for the current channel, the received data does not have to have a request for data broadcast reception and a waiting time until the reception of the data broadcast is completed. There is an advantage in that it is possible to quickly determine the presence of a broadcast and the type of service of the corresponding data broadcast.

By the apparatus and method of the embodiment as proposed, when the user confirms the data broadcast for the current channel, the user does not need to have a request for data broadcast reception and a waiting time until the reception of the data broadcast is completed. There is an advantage that can quickly determine whether there is a data broadcast and the type of service of the data broadcast.

Hereinafter, with reference to the accompanying drawings for the present embodiment will be described in detail. However, the scope of the idea of the present invention may be determined from the matters disclosed by the present embodiment, and the idea of the invention of the present embodiment may be performed by adding, deleting, or modifying components to the proposed embodiment. It will be said to include variations.

In the following description, the word 'comprising' does not exclude the presence of other elements or steps than those listed.

The present invention relates to an image display apparatus capable of receiving a data broadcast, and an apparatus capable of providing the presence or absence of a data broadcast being received to a user and the content type of the data broadcast before receiving all the received data broadcast information. And a method thereof.

3 is a diagram illustrating a configuration of an image display apparatus according to a first embodiment of the present invention.

Referring to FIG. 3, the image display apparatus 100 according to the embodiment includes a tuner 110 as a means for receiving a broadcast signal transmitted from an external (eg, a broadcasting station), and is selected through the tuner 110. A demodulator for demodulating a channel, a demux 120 for demultiplexing a demodulated signal into an audio, video, DVB-SI or PSIP table, and a decoder for decoding the demultiplexed signal 130.

In this case, the tuner is used as a means for receiving the broadcast signal, but in the case of cable TV or IPTV, the broadcast signal receiving means may be replaced with another configuration depending on the applied product.

In addition, the decoder 130 may include an audio decoder 131 for decoding and outputting an audio signal from a demultiplexed signal, and a video decoder for decoding and outputting a video signal from a demultiplexed signal. 132 and a data decoder 133 for decoding the DVB-SI table or the PSIP table. The video combiner 140 may further include a video combiner 140 for combining data output through the video decoder 132 and the data decoder 133.

The image display apparatus 100 further includes a memory unit 150 in which data decoded by the data decoder 133 is stored, and parses data tables (SI information) necessary for the demultiplexed data signal. The parsed SI information is stored in the memory unit 150.

In addition, the image display apparatus 100 according to the embodiment further includes a controller 160 for parsing application information table (AIT) information from the data decoded by the data decoder 133. The controller 160 and the memory unit ( 150, a bus 101 connecting the demultiplexer 120 and the decoder 130.

The controller 160 parses the AIT information to read information recorded in a predetermined specific field.

In particular, the controller 160 controls the channel tuning operation by the tuner 110 so that an image of a channel selected by the user can be displayed, and is received through the current channel when the user requests confirmation of data broadcasting. It is checked whether AIT information is included in the data broadcast signal together with the video signal.

That is, the controller 160 determines whether AIT information is included in the data information with respect to the broadcast signal received through the tuner 110. If data broadcast information including AIT information is not included in the broadcast signal for the current channel, it is determined that data broadcast content for the current channel does not exist.

When the data broadcast information including the AIT information is received in the broadcast signal for the current channel, the controller 160 determines that data broadcast content is received on the current channel. The controller 160 parses the AIT information and quickly determines the type of data broadcasting content transmitted through the current channel with reference to the 'application signaling descriptor' configured in the AIT information.

That is, the controller 160 determines the content type of the data broadcast by referring to the 'application signaling descriptor' which is a specific field in the AIT information before completing the reception of the data broadcast signal for the current channel.

A configuration describing the type of data broadcast in the AIT information will be described in detail with reference to FIGS. 4 and 5.

FIG. 4 is a diagram illustrating some description contents of AIT information applied to an embodiment of the present invention, and FIG. 5 is a diagram for describing a description of a descriptor inserted into a field of the AIT information.

According to an embodiment of the present invention, the AIT information is first decoded from the data broadcast information received on the current channel, the information recorded in a specific field preset in the AIT information is read, and the type of data broadcast is preferentially given to the user. To provide.

To this end, the demultiplexer 120 may preferentially output AIT information to the data decoder 133 through section filtering. The AIT contains information about the application running on the receiver for data service.

The AIT may include information about the application, such as the name of the application, the version of the application, the priority of the application, the ID of the application, the status of the application (auto-start), the type of the application, It may include information about the location of the stream containing the classes and data files of the application, the base directory of the application, the location of the icon of the application, and the like.

In particular, the present invention is characterized by configuring a field in which information on a service type of data broadcasting is recorded in the AIT information. For example, the 'data_service_kind' field is configured in the 'application signaling descriptor' of the AIT.

In the 'data_service_kind' field formed in the application signaling descriptor, information on the service type for data broadcasting received on the current channel is recorded. In the received data signal, the search for the 'data_service_kind' field in the AIT information is performed first. .

The method of recording the 'data_service_kind' field in the AIT information may use a reserved field among the fields recorded in the AIT information. That is, by using the 'reserved_future_use' field of the 'application signaling descriptor' in the AIT information, the additional information on the data broadcast, that is, the type of the data broadcast is recorded.

The 'reserved_future_use' field is allocated a data space of 3 bits, and records information on the type of data broadcast in consideration of the number of bits allocated to the 'reserved_future_use' field.

For example, the reserved field is renamed to 'data_service_kind' and the service type information of the data broadcast is recorded there.

FIG. 5 exemplarily shows service type information of data broadcasting recorded in the AIT information. When the service type is news, '0x000' is recorded in the 'data_service_type' field, and the service type is weather information. If the service type is stock information, record '0x010'; if the service type is traffic information, record '0x011'; if the service type is a broadcast program guide, record '0x100' ', And' 0x101 'if the service type is game.

It may be possible to classify the service type in more detail according to the amount of data allocated to the corresponding field in which the service type information of the data broadcast is recorded. In this embodiment, an example of writing a service type in a 3-bit field is described. will be.

The image display apparatus checks the data recorded in the 'data_service_type' field set in the AIT among the received data signals, and then displays the data on the screen by using a predetermined icon, log, or mark. .

That is, 'N' if the service type is news, 'W' if the service type is weather information, and 'S' if the service type is stock information may be provided on the display screen as an OSD.

In order to provide the user with information on the service type of data broadcasting, an icon or the like for each service type may be more familiar to the user. 'N', 'W', 'S', 'T' (see Fig. 5), 'P.G.' (see Fig. 5). An image may be used to graphicize the letter 'G' or to allow a user to easily recognize each service type.

In addition, the user can be informed about the type of data broadcast service available on the current channel by various methods, which will be described with reference to FIGS. 6 to 9.

6 to 9 are diagrams for describing a method of providing information on a service type of data broadcasting to a user according to the present embodiment.

6, a first screen 601 for outputting a video signal for a current channel on a screen of a display unit, and a second screen 602 for outputting an OSD on the first screen 601 when a user requests a broadcast guidance. Is shown.

When the user operates a remote control unit that can remotely control the operation of the video display device, and inputs a command such as broadcast guide or data broadcast confirmation while watching a broadcast of the current channel, the control unit of the video display device The control unit 160 controls the demultiplexer 120 and the data decoder 133 to confirm whether the AIT is included in the received broadcast signal and the service type field recorded in the AIT.

The second screen 602 includes information on the presence or absence of data broadcasting on the current channel or the type of service of the data broadcasting. The second screen 602 is positioned on the first screen 601 where an image is displayed, and the display position thereof may be changed in various ways.

FIG. 7 shows an example in which information on a service type of data broadcasting is displayed on a second screen 602. The first area 603 indicating whether data broadcasting is present or not and the service type of data broadcasting are shown. The second region 604 may be included.

In the case where a data broadcast service is currently provided on a channel, that is, when an AIT exists in a data signal of a received broadcast signal, the first area 603 may be highlighted or illuminated.

In addition, the second area 604 in which the information on the service type of the data broadcast is displayed may be highlighted on a service icon corresponding to the read service type. For example, in the drawing, the letter 'N' is highlighted so that the user can know that the data broadcast for the news information is being received.

In addition, the information on the service type may be expressed in another manner, and an icon 605 indicating the service type of the data broadcast of the current channel is displayed (see FIG. 8), and is added to the position where the icon 605 is displayed. Character ('NEWS') 606 may be replaced and displayed. That is, the icon 605 and the description text 606 may be displayed while being repeatedly replaced.

In addition, an interface configuration for providing a user with information on a service type of data broadcasting may be formed in various ways.

10 is a diagram showing the configuration of an image display device according to a second embodiment of the present invention.

FIG. 10 illustrates a case where a plurality of tuners are provided in the image display apparatus. According to the second embodiment, information about a service type of data broadcasting for a current channel is acquired through the first tuner 211. The second tuner 212 may acquire information about a service type of data broadcasting for another channel.

The video display device of the second embodiment includes a first tuner 211 and a second tuner 212 for receiving a broadcast signal, a demodulator for demodulating a selected channel through the tuners 211 and 212, and a demodulated signal. First and second demultiplexers (221, 222) for demultiplexing the video into audio, video, DVB-SI, or PSIP tables, and first and second decoders (231, 232) for decoding the demultiplexed signals. Include.

In addition, the image display apparatus includes a video processor 270 for displaying the image signals decoded through the first and second decoders 231 and 232 on the screen through the display unit 280.

In addition, the first tuner 211 is controlled to receive the video and audio signals of the received broadcast signal, the second tuner 212 is a control unit for controlling to receive the data signal of the received broadcast signal And a memory unit 250 for storing the received data signal.

In detail, the controller 260 controls to receive the broadcast signal for the current channel through the first tuner 211, and in particular, the first demultiplexer 221 preferentially prioritizes AIT information among the received data signals. As a result, the control is provided to the data decoder 2313 of the first decoder 231.

The user can easily check the presence or absence of data broadcasting for the current channel and the type of service of the data broadcasting.

In addition, the controller 260 controls the second tuner 212 and the second demultiplexer 222 so as to check the service type of data broadcasting for another channel (not a current channel).

That is, it is possible to provide not only the type of data broadcasting service for the current channel but also the type of data broadcasting service for the other channel to the user.

Therefore, the user does not need to move a channel to another channel in order to confirm the data broadcast transmitted to the other channel. In particular, the user can check the service type of the data broadcast before receiving all the data signals.

Referring to the configuration of the image display apparatus shown in FIG. 10, the first and second demultiplexers 221 and 222 may output the AIT information included in the data signal even before the reception of the data signal through the tuner is completed. And the second decoder 231 and 232.

In addition, the first decoder 231 decodes the received data signal together with the decoding operation of the video and audio signals for the current channel, so that the controller 260 can check the data written in the AIT information. The first decoder 231 includes an audio decoder 2311 for decoding an audio signal of a current channel, a video decoder 2312 for decoding an image signal, and a data decoder 2313 for decoding a received data signal. ).

In addition, when a user requests confirmation of data broadcasting on another channel while watching a broadcast signal received through the first tuner 211, the controller 260 controls the second tuner 212 to control the corresponding data. It is possible to receive a broadcast signal for a channel (a channel requested by a user), whether the AIT information is included in the data signal received through the second tuner 212, and the service type information recorded in the AIT information. Read out.

For example, in the case of an image display apparatus capable of implementing a picture in picture (PIP) function by the second tuner 212, when the user wants to watch another channel using the PIP function, the control unit 260 may use another channel. The service type of the received data broadcast is provided to the user while displaying the video.

Even in this embodiment, the service type of the data broadcast received through the first tuner 211 and the second tuner 212 is displayed on the screen by a text or a predetermined icon, and when the electronic program guide (EPG) is displayed. A specific icon indicating the type of service of data broadcasting may be displayed on the screen.

According to the video display device according to the second embodiment, not only the service type of the current channel but also the service type of other channels can be provided, so that the user can change the channel movement and data in order to confirm the data broadcasting provided on the other channel. There is no need to wait for signal completion.

11 is a flowchart illustrating a method of providing information on a service type of data broadcasting according to an embodiment of the present invention.

First, when the user requests the guidance of data broadcasting (S201), whether the AIT information is included in the received broadcasting signal is first searched (S202). When the user requests a guide of data broadcasting, the user may input a command for confirming EPG information or input a data broadcasting confirmation key provided separately.

When the AIT information is not included in the data signal among the received broadcast signals, the data broadcast service may not be performed on the current channel.

On the other hand, when AIT information is included in the received data signal, a service of data broadcasting is being performed on a current channel, and at this time, a character or icon indicating that data broadcasting exists on the screen of the video display device. Etc. may be displayed.

Even before the reception of the data broadcast, demultiplexing and decoding are first performed on the received AIT information, and the service information described in the AIT information is determined by parsing the AIT information (S203).

Then, an icon corresponding to each type of service to be read is displayed on the screen (S204). The type information of the data broadcast service displayed on the screen guides the user to use the data broadcast.

That is, when the user operates the remote control unit or the like and selects an icon indicating the type of service displayed on the screen (S205), an operation for receiving the entire data broadcast information is performed (S206), and the reception is completed. When the data broadcast is available, the user can use it (S207).

Therefore, in the case where the user confirms the data broadcast for the current channel, there is no need of requesting data broadcast reception and waiting time until the reception of the data broadcast is completed. The advantage is that you can quickly identify the type of service.

1 and 2 illustrate a method of providing information on data broadcasting according to the prior art.

3 is a diagram illustrating a configuration of an image display apparatus according to a first embodiment of the present invention.

4 is a diagram illustrating some technical contents of AIT information applied to an embodiment of the present invention.

5 is a diagram for explaining contents of a descriptor inserted into a field of the AIT information;

6 to 9 are diagrams for explaining a method of providing information on a service type of data broadcasting to a user according to the present embodiment;

10 is a diagram showing the configuration of an image display device according to a second embodiment of the present invention.

11 is a flowchart illustrating a method of providing information on a service type of data broadcasting according to an embodiment of the present invention.

Claims (11)

A tuner for receiving broadcast signals, A demultiplexer which demultiplexes the broadcast signal received through the tuner into a video signal, an audio signal, and a data signal; A decoder which performs signal processing so that an image signal or a data signal outputted through the demultiplexer is displayed on a display unit; A memory unit for storing a data signal included in the broadcast signal; And a control unit for determining whether an application information table (AIT) exists in the data signal and information on a service type of data broadcasting described in the AIT. The method of claim 1, And the information on the service type of the data broadcast is described in an application signaling descriptor in the AIT information. The method of claim 1, And the control unit reads out information on a service type of the data broadcast, and then displays an icon or a mark of the service type on the display unit. The method of claim 1, And the controller controls reception of a data signal through the tuner and demultiplexing and decoding of the data signal when a request for confirming a service type of the data broadcast is received. Receiving a request for confirmation of broadcast information; Checking whether AIT information is included in a data signal of a received broadcast signal; Reading information on a service type of data broadcasting described in the AIT information; and And displaying a mark corresponding to the service type of the read data broadcast on the screen. The method of claim 5, Marker corresponding to the service type of the data broadcast, Image display method characterized in that the displayed on the screen as a letter or icon. The method of claim 6, Marker corresponding to the service type of the data broadcast, And a plurality of icons corresponding to each service type are displayed on a screen, and an icon corresponding to a service type of a data signal received through the tuner is highlighted. An image display device for receiving a signal of data broadcasting included in a broadcast signal, A display unit which displays a video signal included in the broadcast signal on a screen; And a control unit for acquiring information on the service type of the data broadcast from the signal of the data broadcast, and displaying a mark corresponding to the acquired service type of the data broadcast on the display unit. The method of claim 8, And the control unit highlights or lights a mark corresponding to a service type of the data broadcast displayed on the display unit. A first tuner and a second tuner for receiving a broadcast signal; A demultiplexer which demultiplexes a data broadcast signal from broadcast signals received from the tuners; A decoder for decoding the data broadcast signal; And a controller configured to control the video signal included in the broadcast signal provided through the first tuner to be displayed on the display unit. The broadcast signal includes AIT information in which information about a service type of data broadcast is described. The control unit displays information on the service type of the data broadcast on the display unit, The control unit identifies a service type of data broadcast provided by a first broadcast channel from a broadcast signal received by the first tuner, and provides a service of data broadcast provided by a second broadcast channel from a broadcast signal received by the second tuner. Image display apparatus characterized by identifying the type. The method of claim 10, The control unit displays information on the service type of the data broadcast provided by the first broadcast channel and information on the service type of the data broadcast provided by the second broadcast channel on the display unit as a preset icon. A video display device.

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