KR101704818B1 - Display apparatus and method changing channel thereof - Google Patents

Abstract

A channel switching method of a display device for receiving a digital broadcasting signal using a plurality of tuners, the method comprising: generating a channel switching event to a first channel; Receiving and displaying a broadcast signal of the first channel through a first tuner; Receiving a broadcast signal of a second channel associated with the first channel using a second tuner; And displaying a broadcast signal of a second channel received through the second tuner as a channel switching event to the second channel occurs.

Description

DISPLAY APPARATUS AND METHOD OF CHANGING THE SAME [0001]

More particularly, the present invention relates to a display device and a channel switching method for reducing a time required for switching a channel by performing a tuning operation in advance by predicting a channel to be switched at the time of channel switching .

Generally, a broadcast receiving apparatus receives a data stream including a broadcast signal, extracts a video and audio data stream corresponding to a channel desired by a user using service information included in the received data stream, and outputs the extracted video and audio data stream to a display device.

For example, a digital television receiver has a function of converting a received broadcast signal into a digital code and adding high-quality screen reproduction and various functions. In digital broadcasting, video and audio streams are compressed and compressed into digital information, and system information and program information are compressed and broadcast according to PSIP (Program and System Information Protocol) standard.

The present invention provides a display device and a channel switching method thereof capable of efficiently receiving a digital broadcasting signal.

More specifically, in the embodiment of the present invention, the channel to be switched next is predicted in advance, and an operation required for channel switching is performed in advance, thereby reducing the time required for channel switching.

 It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise forms disclosed. .

A channel switching method of a display device for receiving a digital broadcasting signal using a plurality of tuners, the method comprising: generating a channel switching event to a first channel; Receiving and displaying a broadcast signal of the first channel through a first tuner; Receiving a broadcast signal of a second channel associated with the first channel using a second tuner; And displaying a broadcast signal of a second channel received through the second tuner as a channel switching event to the second channel occurs.

In addition, a display apparatus according to an embodiment of the present invention includes a first tuner for receiving a broadcast signal of a first channel for which channel switching is requested; A second tuner for receiving a broadcast signal of a second channel associated with the first channel; A signal processor for signal processing the broadcast signals received through the first and second tuners; And a controller for determining a second channel associated with the first channel as the channel change to the first channel is requested and controlling the broadcast signal of the determined second channel to be received through the second tuner And the second channel is changed according to a user command inputted when the channel switching request is made.

According to an embodiment of the present invention, a channel to be next switched using a plurality of tuners is predicted in advance, and a broadcast signal of the predicted channel is received in advance, It is possible to receive a broadcast signal, thereby reducing the channel switching consumption time of the display device.

1 is a block diagram of a broadcasting system for receiving and displaying a broadcast signal;
2 and 3 are block diagrams of a broadcast receiving apparatus according to an embodiment of the present invention;
FIG. 4 is a flowchart for explaining a channel switching method of the display device according to the first embodiment of the present invention step by step. FIG.
5 is a view showing an example of a channel map screen according to an embodiment of the present invention.
FIG. 6 is a flowchart illustrating a method of switching a channel of a display device according to another embodiment of the present invention.
7 illustrates an EPG screen displayed in accordance with an embodiment of the present invention.
FIG. 8 is a flowchart for explaining a channel switching method to the received second channel step by step. FIG.
9 is a view showing a channel browser screen formed by an embodiment of the present invention;

The proposed embodiment will be described.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. It should be understood, however, that there is no intention to limit the scope of the present invention to the embodiment shown, and other embodiments which are degenerative by adding, changing or deleting other elements or other embodiments falling within the spirit of the present invention Can be proposed.

Although the term used in the present invention is a general term that is widely used at present, there are some terms selected arbitrarily by the applicant in a specific case. In this case, since the meaning is described in detail in the description of the corresponding invention, It is to be understood that the present invention should be grasped as a meaning of a non-term.

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

1 is a block diagram illustrating a configuration of a broadcast system for receiving and displaying a broadcast signal.

1, a broadcast receiving apparatus 100 receives a data stream including a broadcast signal through a satellite, a cable, and the like, and receives video and audio corresponding to a channel selected by the user from the received data stream, The audio data can be extracted and processed, and then output to the display device 200.

A broadcast receiving apparatus 100 receives a broadcast signal using a wired or wireless network and converts the received broadcast signal into a form that can be output from a display apparatus and outputs the converted broadcast signal to a display apparatus 200. [ top box, STB).

However, the broadcast receiving apparatus 100 according to the present invention is not limited to the set-top box (STB), and may be any type of broadcast receiving apparatus capable of receiving broadcast signals transmitted from the outside and outputting the broadcast signals to the display apparatus 200 connected by wire or wireless Device.

In addition, the broadcast receiving apparatus 100 and the display apparatus 200 may be integrated into one apparatus, and may be included in a digital television equipped with a tuner.

The display device 200 displays an image using a video signal input from the broadcast receiving apparatus 100. The display device 200 may be a liquid crystal display (LCD), a plasma display panel (PDP), an electro luminescent display (ELD) (Vacuum Fluorescent Display) can be used to display images.

In the case of digital broadcasting, video and audio data are compressed into digital information, and system information and program information are compressed according to the PSIP (Program and System Information Protocol) standard, and are generated as a data stream together with the compressed video and audio data, And transmitted to the device 100.

The PSIP is a standard for terrestrial and cable digital broadcasting in which specifications of program information and system information are defined. The PSIP parses signals encoded in accordance with the MPEG (Moving Picture Experts Group) standard to provide various information about the program It is defined in order to do.

More specifically, the broadcast receiving apparatus 100 includes a data processing unit (not shown) for extracting service information from a received data stream and separating various channel information therefrom, video and audio data And a decoding unit (not shown) for decoding the data.

Meanwhile, the broadcast receiving apparatus 100 may be connected to the display device 200 through a High Definition Multimedia Interface (HDMI), a Digital Visual Interface (DVI), or a D-Sub cable. However, the connection between the broadcast receiving apparatus 100 and the display device 200 is not limited to the above-described method, and can be connected using cables of various communication methods. The broadcast receiving apparatus 100 and the display apparatus 200 may be connected through a wireless network using a short-range wireless communication such as Zigbee, bluetooth or Wlan .

1, the broadcast receiving apparatus 100 may be provided as a separate device outside the display apparatus. However, in another embodiment of the present invention, the broadcast receiving apparatus 100 may be installed inside the display apparatus 200 And may be implemented as one set.

2 is a block diagram illustrating the configuration of the broadcast receiving apparatus 100. The broadcast receiving apparatus 100 may include first and second tuners 110 and 120 and a decoding unit 130. [

2, a broadcast receiving apparatus 100 according to an embodiment of the present invention includes a first tuner 110 and a second tuner 120, which receive a plurality of tuners, that is, broadcast signals of different channels, . ≪ / RTI >

For example, the first tuner 110 may extract a broadcast signal corresponding to a channel currently being watched by a user from a data stream received from an antenna (not shown) and output the extracted broadcast signal to the decoding unit 130, 120 may extract and receive a broadcast signal corresponding to a specific channel different from the view channel from the data stream.

More preferably, the second tuner 120 may receive a broadcast signal to be displayed on the sub-screen to perform a PIP (Picture In Picture) function.

Also, in the embodiment of the present invention, the first tuner 110 receives a broadcast signal corresponding to a currently viewed channel, and the second tuner 120 receives all the channels Can be sequentially received.

The decoding unit 130 decodes a broadcast signal of the viewing channel received by the first tuner 110, more specifically, a video signal or an audio signal, into data reproducible on the display device 200 and outputs the decoded data.

On the other hand, the broadcast signal of the specific channel received by the second tuner 120 can be stored in a memory (not shown), thereby allowing the user to record content broadcast on channels other than the currently viewed channel, .

In addition, when the channel switching is requested, for example, when the user selects a second channel different from the first channel currently being viewed, the first tuner 110 receiving the broadcast signal of the first channel transmits the requested A channel switching operation may be performed to receive the broadcast signal of the second channel.

By the channel switching operation of the first tuner 110 as described above, there occurs a certain delay from the time point of requesting the channel change of the user until the time when the broadcast signal of the second channel is actually received and displayed, May be increased from 2 seconds to 4 seconds in the case of digital broadcasting.

3 is a block diagram illustrating a configuration of a broadcast receiving apparatus according to an exemplary embodiment of the present invention. The broadcast receiving apparatus includes first and second tuners 110 and 120, a controller 140, and a decoder 130, . ≪ / RTI >

Referring to FIG. 3, the first tuner 110 receives a broadcast signal of a channel currently being viewed by the user, the second tuner 120 extracts and receives a broadcast signal of a specific channel different from the view channel, It is possible to sequentially receive broadcast signals of all channels existing on the channel map in order to implement a browser screen.

According to an embodiment of the present invention, the second tuner 120 may predict a channel to be switched in an operating condition in which a channel banner is displayed, receive a broadcast signal of the predicted channel, and display the channel banner Performs the channel browser function under non-operating conditions.

Here, the operation condition in which the channel banner is displayed may include a case where a channel change occurs, a case where an OK key for confirming broadcast information of a current channel is input, an input change occurs, and the like.

That is, when the user wants to change the channel to the first channel, that is, to request the channel change to the first channel, a channel banner corresponding to the switched first channel is displayed on the upper side of the display screen .

When such a situation occurs, the second tuner 120 predicts the next channel to be switched, and receives the broadcast signal of the predicted channel accordingly.

Here, the channel received through the second tuner 120 may be changed according to a channel currently being watched, that is, a channel received through the first tuner 110, and a user command generated upon the channel switching request.

That is, the actual channel number of the second channel may be changed according to the number of times the channel requested by the user is requested, and the user inputs a key to request the channel change. This will be described in more detail below.

The control unit 140 may select one of the output signals of the first and second tuners 110 and 120 and output the selected signal to the decoding unit 130. The decoding unit 130 may select one of the output signals of the first and second tuners 110 and 120, It is possible to decode and output the broadcast signal received from any one of the first and second tuners 110 and 120.

That is, when the control unit 140 selects an output signal of the first tuner 110, the broadcast signal received from the first tuner 110 is decoded and output by the decoding unit 130, When the output signal of the tuner 120 is selected, the broadcast signal received by the second tuner 110 may be decoded by the decoding unit 130 and then output.

For this purpose, the control unit 140 may include a switching unit (not shown) for selecting any one of the output signals of the first and second tuners 110 and 120.

More specifically, if there is no channel change request by the user, the control unit 140 controls the decoding unit 130 to input the broadcast signal of the current viewing channel received from the first tuner 110. [ At this time, the second tuner 120 sequentially receives broadcast signals of all channels existing on the channel map, extracts thumbnails, and generates a channel browser screen based on the extracted thumbnails.

If there is a request to switch to a channel received by the second tuner 110, the control unit 140 controls the broadcast signal received from the second tuner 110 to be input to the decoding unit 130, The broadcast signal of the requested channel may be decoded by the decoding unit 130 and output to the display device 200. [

As described above, when the control unit 140 controls the input of the broadcasting signal received from the second tuner 120 to the decoding unit 130 at the time of channel switching, when the user requests channel switching, The broadcast signal of the channel requested by the user can be received and output to the display device 200.

Hereinafter, a second channel received through the second tuner 120 will be described.

The control unit 140 determines a channel most likely to be switched in the current state in consideration of the current viewing channel, previous channel switching information, or user's preference, and accordingly, the broadcasting signal of the determined channel is transmitted to the second tuner 120, respectively.

More specifically, the second channel received by the second tuner 120 may be one of two channels vertically adjacent to the first channel, which is the viewing channel received by the first tuner 110.

That is, when the number of the first channel as the viewing channel is the third channel, the number of the second channel received by the second tuner 120 may be the fourth channel or the second channel.

At this time, the channel determined as the second channel among the two channels vertically adjacent to the first channel may be determined by the user command inputted at the channel switching.

For example, when the user has previously switched to the first channel currently being watched by pressing the "channel UP button" (the button for increasing the channel number by 1 and switching the channel) The second channel received by the second tuner 120 may be a channel whose channel number is 1 greater than the first channel.

That is, when the channel switching is performed by the "channel up button ", the second channel may be a channel located next to the first channel because the channel is located on the channel map.

On the other hand, when the user has previously switched to the first channel currently being watched by pressing the "CHANNEL DOWN button" (button for decreasing the channel number by one and switching the channel one by one) The second channel received by the second tuner 120 may be a channel whose channel number is one less than the first channel.

The control unit 140 may determine the channel of the broadcast signal to be received by the second tuner 120 using the information on the currently viewed channel and the channel switching performed by the user as described above, So that the second tuner 120 receives the broadcast signal of the second tuner 120. [

In addition, the second channel received by the second tuner 120 may be a channel viewed by the user before the first channel, which is the current viewing channel. That is, when the user is watching channel 3 and then switching to channel 8 and currently watching, the channel of the broadcast signal received by the second tuner 120 may be the channel 3 previously viewed by the user.

For example, when the user has previously switched to the first channel currently being viewed by using the "previous viewing channel button" (button for performing channel switching to the previously viewed channel) The second channel received by the second tuner 120 may be a channel viewed by the user before the first channel.

In addition, the second channel received by the second tuner 120 may be a favorite channel located after the first channel, which is the current viewing channel among the channels registered in the preferred channel list.

For example, when the user has previously switched to the first channel currently being watched using the "favorite channel button" (button for performing channel switching to the channel existing in the preferred channel list) The second channel received by the second tuner 120 may be a preferred channel located after the first channel because it is highly likely to perform channel switching to the located preferred channel.

The control unit 140 is configured to predict a channel to be next switched based on a list of a channel list, a preferred channel list, and a previously viewed viewing history list existing on the channel map, And controls the second tuner 120 to receive the broadcast signal of the predicted channel.

In addition, according to another embodiment of the present invention, channel switching may be performed on an electronic program guide (EPG) screen. That is, as described above, channel switching can be performed not only on the channel up / down button, the preferred channel button, and the previous channel button, but also on the EPG screen using the direction key and the confirmation key.

That is, the user moves the selected cursor to the program that he wants to view using the direction keys such as up / down / left / right on the EPG screen, inputs the confirmation key accordingly, You can change the program. In other words, the user can perform channel switching to the channel on which the program is being broadcast.

Accordingly, when the channel switching is performed on the EPG screen, the controller 140 analyzes the direction key inputted at the channel switching, predicts the next channel to be switched according to the analyzed direction key, Tuner 120 in order to receive the data.

Hereinafter, a channel switching method of the display device will be described in detail with reference to the accompanying drawings.

4 is a flowchart for explaining a channel switching method of the display apparatus according to the first embodiment of the present invention step by step.

Referring to FIG. 4, the controller 140 recognizes the occurrence of the channel switching event when a channel switching event to the first channel occurs (operation 101). Here, the channel switching event may be generated by a remote controller or a local key input unit provided on one side of the display apparatus.

In step 102, the control unit 140 receives a broadcast signal corresponding to the first channel through the first tuner 110 as the channel change event to the first channel occurs.

Then, the control unit 140 checks the input user command to generate the channel switching event when the channel switching event occurs (operation 103).

That is, the controller 140 determines whether a channel switching event has occurred as the channel up button is input (operation 104).

If the channel switching event is generated by the channel up button, the controller 140 determines the upper channel of the first channel to be the second channel (operation 105). In other words, the controller 140 predicts the channel located immediately above the first channel among the channels existing on the channel map as the next channel to be converted, and determines the predicted conversion channel as the second channel accordingly.

5 is a diagram illustrating an example of a channel map screen according to an embodiment of the present invention.

5, if the first channel is a channel number 9 and the channel switching event is generated by the channel up button as described above, the controller 140 determines that the upper channel of the channel " 9 " Quot; channel is determined to be the second channel.

If it is determined in step 104 that a channel switching event has not occurred due to the channel up button, the controller 140 determines whether a channel switching event has occurred by the channel down button in step 106.

As a result of the determination (step 106), if a channel switching event is generated by the channel down button, the controller 140 determines the lower channel of the first channel as the second channel.

5, if the first channel is a channel number 9 and the channel switching event is generated by the channel down button as described above, the controller 140 controls the sub-channel of the channel "9" 8 "is determined as the second channel.

If it is determined in step 106 that a channel switching event has not occurred due to the channel down button, it is determined in step 108 whether a channel switching event has occurred by the previous channel.

If the channel switching event is generated by the previous viewing channel button, the controller 140 determines the channel that the user has watched before switching to the first channel to be the second channel (step 109) step).

That is, for example, if the user performs channel switching to the channel "9 " using the previous viewing channel button while viewing the channel" 2 ", the controller 140 determines that the current viewing channel Quot; 2 ", which is the previous viewing channel, as the second channel.

If it is determined in step 108 that the channel switching event has not occurred due to the previous channel selection button, the controller 140 determines whether a channel switching event has occurred in the preferred channel button in step 110. FIG.

As a result of the determination in step 110, the controller 140 determines that the preferred channel located in the upper part of the first channel is a second channel in step 111.

Referring to FIG. 5, when channel switching to channel 34 is performed by the preferred channel button, the controller 140 sets the channel # 39-3, which is the next channel of the channel # 34, Channel.

If the second channel is determined as described above, the control unit 140 causes the second tuner 120 to receive the determined broadcast signal in step 112.

FIG. 6 is a flowchart illustrating steps of a channel switching method of a display apparatus according to another embodiment of the present invention.

Referring to FIG. 6, the controller 140 displays an EPG screen and selects a program of a first channel on the displayed EPG screen (step 201).

 7 is a view showing an EPG screen displayed according to an embodiment of the present invention.

Referring to FIG. 7, the currently selected cursor is positioned on the 6-5 channel, and the user can change the position of the selected cursor by using direction keys (up / down / left / right). In addition, the user can change the position of the selected cursor and select a broadcast program of a specific channel in which the selected cursor is located.

When the program of the first channel is selected on the EPG screen, the controller 140 receives the broadcast signal of the selected first channel through the first tuner (step 202). At this time, the broadcast signal received through the first tuner 110 is displayed through a separate area on one side of the EPG screen.

When the program of the first channel is selected, the control unit 140 confirms the command input by the user (step 203).

That is, the control unit 140 determines whether the program of the first channel is selected by inputting an upward direction key (operation 204).

If the program of the first channel is selected by inputting the upward direction key on the EPG screen, the control unit 140 predicts a program located above the selected program by the next program to be switched, It is determined to be two channels (step 205).

That is, if the up arrow key is input on the EPG screen and the MBC news being broadcasted in the channel "7-1" is selected, the controller 140 controls the channel "6-5" located above the selected channel to the second channel .

If the up key is input and the program of the first channel is not selected, the control unit 140 determines whether the first channel program is selected by inputting the down direction key (Step 206).

If the downward direction key is input and the program of the first channel is selected, the control unit 140 determines a channel located below the first channel as a second channel in operation 207.

That is, if the downward direction key is inputted on the EPG screen and the MBC news being broadcasted in the channel "7-1" is selected, the control unit 140 controls the channel "9-1" located below the selected channel to the second channel .

On the other hand, if a specific genre is selected by the user on the EPG screen, only the program (channel) corresponding to the selected genre is activated on the EPG screen. Also, the user can perform channel switching only on the activated channel.

As described above, when a specific genre is selected and channel switching is performed only with a program corresponding to the selected genre, the controller 140 determines whether the program corresponding to the selected genre is being played Or a channel located downward is determined as the second channel.

For example, there are channels 7-1, 8-1, 9-1, 10-1, 11-1, 12-1, and 13-1 on the EPG screen, and 7-1, 9- 1, 11-1, and 13-1 are activated, that is, when the channels 7-1, 9-1, 11-1, and 13-1 belong to the genre selected by the user, One channel is determined to be the second channel. In other words, when the user performs channel switching to the channel 11-1 by using the up-arrow key, the controller 140 controls the channel 9-1 located above the channel 11-1 on the EPG screen It is decided by two channels. When the user performs channel switching to the channel 11-1 using the down direction key, the controller 140 controls the channel 13-1 located below the channel 11-1 on the EPG screen to the second channel Channel.

In addition, if the second channel is determined as described above, the controller 140 controls the second tuner 120 to receive the determined broadcast signal of the second channel.

FIG. 8 is a flowchart for explaining the channel switching method to the received second channel step by step.

Referring to FIG. 8, the controller 140 firstly displays a first channel corresponding to the channel switching event occurrence, that is, a first channel received through the first tuner (step 301).

In addition, the controller 140 determines whether a channel switching event has occurred in a state where the broadcast signal of the first channel is displayed (operation 302). More preferably, the controller 140 determines whether a channel switching event to the determined second channel has occurred.

If a channel switching event to the second channel occurs, the control unit 140 causes the broadcast signal previously received through the second tuner to be displayed (operation 303).

If the channel switching event to the second channel is not generated, the controller 140 determines whether a channel banner is currently displayed on the display screen in operation 304.

If the channel banner is not displayed on the display screen, the controller 140 controls the channel browser function to be performed through the second tuner 120 (step 305).

That is, if the channel switching event to the second channel is not generated and the channel switching event to the third channel occurs, the controller 140 transmits the broadcast signal of the third channel through the first tuner 110 . At this time, the control unit 140 predicts the fourth channel to be next switched on the basis of the third channel to be switched, so that the broadcast signal of the fourth channel is received through the second tuner 120. [

In addition, when the channel banner displayed on the display screen disappears due to no channel switching event occurring, the controller 140 performs the channel browser function through the second tuner 120.

Accordingly, the second tuner 120 sequentially receives broadcast signals of all channels existing on the channel map, and extracts a thumbnail image corresponding to each channel from the sequentially received broadcast signals.

As shown in FIG. 9, the controller 140 generates a channel browser based on the extracted thumbnail image, and displays the generated channel browser in response to a user request.

According to an embodiment of the present invention, a channel to be next switched using a plurality of tuners is predicted in advance, and a broadcast signal of the predicted channel is received in advance, It is possible to receive the broadcast signal, thereby reducing the channel switching consumption time of the display device.

110: first tuner 120: second tuner
130: Decoding unit 140:

Claims (16)

A channel switching method of a display device receiving a digital broadcast signal using a plurality of tuners,
Generating a channel switching event to a first channel;
Receiving and displaying a broadcast signal of the first channel through a first tuner;
Receiving a broadcast signal of a second channel associated with the first channel using a second tuner;
Displaying a broadcast signal of a second channel received through the second tuner as a channel switching event to the second channel occurs;
Obtaining a channel banner for the first channel if the channel switching event to the second channel does not occur; And
And generating a channel browser when the channel banner for the first channel is not displayed,
Wherein the second channel is received via an idle tuner only in a display condition of a channel banner for the first channel,
The display condition of the channel banner is,
A case where the channel switching event occurs and a case where a key input for confirming broadcast information of a current channel is received;
A method of switching a channel of a display device. The method according to claim 1,
Wherein the channel switching event is generated by a channel up key,
Wherein the second channel is an upper channel in a continuous relationship with the first channel,
A method of switching a channel of a display device. The method according to claim 1,
Wherein the channel switching event is generated by a channel down key,
Wherein the second channel is a subchannel in a continuous relationship with the second channel,
A method of switching a channel of a display device. The method according to claim 1,
Wherein the channel switching event is generated by a preferred channel key,
Wherein the second channel is a top preferred channel in a continuous relationship with the first channel,
A method of switching a channel of a display device. The method according to claim 1,
The channel switching event is generated by the previous viewing channel key,
Wherein the second channel is a channel viewed before performing channel switching to the first channel,
A method of switching a channel of a display device. The method according to claim 1,
The channel switching event is generated by an up / down / left / right direction key in an EPG (Electronic Program Guide)
Wherein the second channel is a channel located above or below the first channel on the EPG screen,
A method of switching a channel of a display device. The method according to claim 6,
Wherein the second channel is a channel belonging to the same genre as the first channel among channels existing on the EPG screen,
A method of switching a channel of a display device. The method according to claim 1,
Wherein the idle tuner includes a tuner other than a tuner that receives a broadcast signal of the first channel,
A method of switching a channel of a display device. delete The method according to claim 1,
And receiving a broadcast signal of a third channel associated with the second channel through the first tuner as channel switching to the second channel is performed
A method of switching a channel of a display device. In the display device,
A first tuner for receiving a broadcast signal of a first channel for which channel switching is requested;
A second tuner for receiving a broadcast signal of a second channel associated with the first channel;
A signal processor for signal processing a broadcast signal received through the first and second tuners; And
And a control unit for determining a second channel associated with the first channel in response to the request for channel switching to the first channel and receiving the broadcast signal of the determined second channel through the second tuner,
Wherein the second channel is changed according to a user command inputted at the channel switching request,
Wherein the control unit controls the broadcast signal of the second channel received through the second tuner to be processed through the signal processing unit when a channel switching event to the second channel occurs,
Acquiring a channel banner for the first channel if the channel switching event to the second channel does not occur,
Receiving a second channel through an idle tuner only in a display condition of a channel banner for the first channel,
Generating a channel browser when the channel banner for the first channel is not displayed,
The display condition of the channel banner is,
A case where the channel switching event occurs and a case where a key input for confirming broadcast information of a current channel is received;
Display device. 12. The method of claim 11,
Wherein the user command comprises at least one of a channel up, a channel down, a preferred channel, and a previous viewing channel,
Wherein the second channel is one of an upper channel, a lower channel, a higher-level favorite channel, and a previous watch channel that are in continuous relation with the first channel in accordance with the user command,
Display device. 12. The method of claim 11,
The channel change request is generated by an up / down / left / right direction key on an electronic program guide (EPG)
Wherein the second channel is a channel located on an upper side or a lower side of the first channel among channels existing on the EPG screen based on the generated direction key,
Display device. 14. The method of claim 13,
Wherein the second channel is a channel belonging to the same genre as the first channel among the upper or lower channels of the first channel,
Display device. delete delete

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