KR20100044948A - Image display device and method of controlling the same - Google Patents

Abstract

PURPOSE: An image display device and a method of controlling the same are provided to improve user convenience remarkably while watching a TV by providing channel change information to a user. CONSTITUTION: A memory unit(10) stores preset broadcasting channel information, and a broadcasting reception unit(20) receives a broadcasting signal form the outside. The broadcasting reception unit searches a channel, and a control unit(50) controls the channel searching of the broadcasting reception unit for every predetermined cycle. A control unit recognizes the change of broadcasting channel information.

Description

Image display device and method of controlling the same

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display device, and more particularly, to an image display device for providing changed channel information for a channel whose channel information is changed due to a broadcast station, and a control method thereof.

In general, the number of channels provided by the video display device is increasing day by day, and in the future, there will be dozens of times more channels than the current analog television. There are about 100 channels.

Therefore, in digital multi-channel broadcasting, dozens to hundreds of channels are provided, which increases the choice of viewers and at the same time makes program selection more complex. In order to solve this problem, all channels stored in the video display device are designated as favorite channels through the channel editing function.

However, in a broadcaster that provides a service for transmitting each broadcast program through a corresponding channel, when a channel for the corresponding program is changed due to a technology expansion or a broadcast program transfer, a user may watch a corresponding broadcast program. One-time tuning has a disadvantage in that it is not easy to recognize the channel change.

In addition, when the user designates a channel and sets the reserved recording, but the recording target channel is changed, there is a problem in that the corresponding program of the reserved channel desired by the user is not recorded or recorded by another broadcast program.

When the user learns to change the channel by tuning a number of times while watching a broadcast program, to change a favorite channel or skip channel that has been previously set according to the changed channel information, the user can find the corresponding channel by using the remote controller and reset it. There is a cumbersome problem to do.

According to an embodiment of the present invention, when a channel for a broadcast program is changed due to a broadcaster, the previously stored broadcast channel information may be updated.

In addition, according to an embodiment of the present invention, when a channel for a broadcast program is changed due to a broadcaster, the changed information of the changed channel may be provided in a banner format for a predetermined period.

An image display device according to an embodiment of the present invention includes a memory unit for storing preset broadcast channel information; A broadcast receiver configured to receive a broadcast signal input from the outside and perform channel searching; And a controller configured to control the channel search of the broadcast receiving unit at a predetermined period to recognize whether the stored broadcast channel information is changed, and to control to display the changed information of the broadcast channel according to whether the broadcast channel information is changed. do.

A control method of an image display device according to an embodiment of the present invention comprises the steps of: performing a channel search at a predetermined period; Recognizing whether to change preset broadcast channel information according to the performed channel search result; And displaying change information of a broadcast channel whose channel information is changed according to whether the preset broadcast channel information is changed.

An image display device and a control method thereof according to an embodiment of the present invention can easily respond to a user's unilaterally changed channel information by a broadcasting station, and furthermore, the user can become accustomed to the changed channel. By continuously providing information, the user's convenience in watching TV can be greatly improved.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, the spirit of the present invention is not limited to the embodiments presented, and other embodiments included within the scope of other inventive inventions or the scope of the present invention can be easily made by adding, changing, or deleting other elements. I can suggest.

The term used in the present invention is selected as a general term widely used as possible at present, but in certain cases there is also a term arbitrarily selected by the applicant, in which case the meaning is described in detail in the description of the invention, the name of a simple term It should be clear that the present invention is to be understood as a meaning of terms.

1 is a block diagram showing a configuration of an image display apparatus according to an embodiment of the present invention, FIG. 2 is a diagram for explaining change information according to the first embodiment of the present invention, and FIG. 3 is a second view of the present invention. FIG. 4 is a flowchart for explaining change information according to an embodiment of the present invention. FIG. 4 is a flowchart for explaining a method of controlling an image display device according to a first embodiment of the present invention step by step. FIG. 5 is a second embodiment of the present invention. A flowchart for describing in detail a method of controlling an image display device according to the present invention.

As shown in FIG. 1, the image display device according to an embodiment of the present invention includes a memory unit 10 for storing preset broadcast channel information, and a broadcast receiving unit for receiving a channel signal by receiving a broadcast signal input from the outside. 20, a video signal processor 30 for processing a video signal among the broadcast signals received through the broadcast receiver 20, and a display for displaying a video signal processed through the video signal processor 30. The unit 40 controls the channel search of the broadcast receiving unit 20 at predetermined intervals to recognize whether the stored broadcast channel information is changed and to display the change information of the broadcast channel according to whether the broadcast channel information is changed. A control unit 50 for controlling and a change information screen generating unit 60 for generating a change information screen of the broadcast channel according to a control signal of the control unit 50. .

Referring to the operation of the video display device according to an embodiment of the present invention configured as described above are as follows.

The digital broadcast signal is transmitted in the form of a packetized transport stream by time division multiplexing a video signal, an audio signal, and additional data.

The broadcast receiving unit 20 receives a broadcast signal transmitted from the outside through an antenna, and tunes a tuner for tuning a broadcast signal having a frequency band corresponding thereto according to a tuning control signal of the controller 50 to be described later, and tuned specific information. A demodulator for outputting a broadcast signal of a channel in the form of a transport stream through a VSB (Vestigial Sideband) demodulation process and an error correction process, and a broadcast signal in the form of a transport stream output through the demodulator; It may be configured to include a demultiplexer for separating into a variety of additional data defined by the Program and System Information Protocol (PSIP) information to output in the form of a bit stream.

The video data received and output through the broadcast receiving unit 20 is processed by the image signal processing unit 30 and displayed on the display unit 40.

In this case, the image signal processing unit 30 includes an MPEG-2 decoder and a scaler for converting video data so as to conform to a vertical frequency, resolution, aspect ratio, etc., which meet the output standard of the display unit 40.

Here, the display unit 40 may be applied to various types of display modules such as digital light processing (DLP), liquid crystal display (LCD), plasma display panel (PDP), and the like.

In addition, the broadcast receiving unit 20 performs a channel search operation of sequentially tuning broadcast channels of all frequency bands according to a control signal of the controller 50 to be described later.

At this time, the memory unit 10 stores broadcast channel information previously set by the user.

Accordingly, the controller 50 compares the information on the broadcast signals of the channels sequentially received through the broadcast receiving unit 20 with the broadcast channel information previously stored in the memory unit 10, and accordingly is previously set and stored. Recognizes whether to change broadcast channel information.

In this case, the controller 50 obtains a PAT (Program Association Table) from the broadcast signal received through the broadcast receiving unit 20, compares the obtained PAT with the broadcast channel information stored in the memory unit 10 It is determined whether there is a broadcast channel whose channel information is changed.

In this case, the PAT information is included in the EPG (Electronic Program Guide) information transmitted with the broadcast signal, each program number includes a component of the program, and transport to transmit PMT (Program Map Table) information Pointer to the PID of the packet.

In addition, the Electronic Program Guide (EPG) is defined in the Program and System Information Protocol (PSIP), together with System Information (SI), which transmits and receives A / V data in MPEG-2 video and AC-3 audio formats. And, it is composed of several tables to transmit information about the channels of each broadcasting station and information about each program of the channel.

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. It is transmitted through (Event Information Table).

In addition, the EIT has a title, a start time, and the like, which are information about an event of a virtual channel, and an event is in most cases a typical TV program.

In addition, PSIP includes a System Time Table (STT) for time information, a RRT (Rating Region Table) for transmitting information on regions and deliberation institutions for program grades, and an ETT for additional explanation of channels and broadcast programs. (Extender Text Table) and MGT (Master Guide Table) for version and PID management of each of these tables.

That is, as the broadcast program is transmitted to the changed channel due to the broadcaster's situation, the PAT information including the changed channel information is different from the previously stored broadcast channel information.

Therefore, the controller 50 determines whether a channel whose broadcast channel information has been changed exists, and if there is a channel whose broadcast channel information has changed, updates the previously stored broadcast channel information based on the changed channel information.

In addition, if there is a channel in which the broadcasting channel information is changed, the controller 50 collects only the channels in which the broadcasting channel information is changed, and controls the display unit to display the changed information for a predetermined period of time.

In this case, the display apparatus may display change information including information on all channels whose broadcast channel information has been changed at predetermined intervals, or selectively display only change information on a channel currently being viewed by the user.

That is, the change information 100 according to the first embodiment of the present invention includes a channel 110, previous channel information 120, and current channel information 130, as shown in FIG. 2.

The channel 110 represents a channel number, and the previous channel information 120 displays broadcast channel information that was broadcast before the broadcast channel information was changed in the channel 110, and the current channel information 130. The broadcast channel information is changed to display broadcast channel information to be broadcasted on the channel 110 in the future.

Herein, the meaning of the change of the broadcasting channel information means, for example, that 'MBC' has been aired in CH6. it means.

Accordingly, in the first embodiment of the present invention, in order for the user to recognize the state of all the channels in which the broadcasting channel is changed, the previous channel information 120 and the current channel information 130 are added to all the channels in which the broadcasting channel information is changed. The included change information is displayed at regular intervals for a certain period of time.

In addition, the change information 200 according to the second embodiment of the present invention is displayed when a specific event occurs, and when the specific event occurs, when a command to switch to the channel where the broadcast channel information is changed is input. Means.

That is, as shown in FIG. 3, the change information 200 according to the second embodiment of the present invention is displayed when a switch command to a channel whose broadcast channel information is changed from the outside is inputted. Previous channel information 210 previously broadcasted on the channel to be changed, change channel information 220 currently broadcasted by the existing broadcast, and command to switch to the corresponding channel according to the changed channel information 220 There is a channel switching menu 230 for inputting.

For example, when a switch command to 'CH10' is input from the user, the control unit 50 determines whether the broadcast channel information for 'CH10' is changed, and the broadcast channel information for 'CH10' If changed, the broadcast channel information previously broadcasted on 'CH10' and the changed broadcast channel information indicating which channel the previously broadcasted broadcast channel is currently on is displayed.

In other words, if 'MBC' was previously broadcasted at 'CH10', and if the 'MBC' is currently being broadcasted at 'CH6', the change information for 'CH10' is the previous channel information of 'MBC' and 'CH6'. 'Change channel information is displayed.

In addition, if the user changes the channel to 'CH10' without knowing that the 'MBC' channel is changed to 'CH6' by setting the channel switching 230 menu, the channel switching is easily performed to 'CH6'. Do it.

In other words, if the KBS is changed from channel 7 to 10, the user unintentionally selects 7 to see the KBS. At this time, the KBS that was being broadcasted on the channel was changed to 10. By activating the shortcut function for switching the channel to the 10, it provides convenience according to channel selection until the user becomes accustomed to the change channel.

As described above, the video display device and the control method thereof according to the embodiment of the present invention can easily respond to the channel information unilaterally changed by a broadcasting station, and the changed channel until the user becomes accustomed to the changed channel. By continuing to provide information about can greatly improve the user's convenience in watching TV.

In the control method of the image display device according to the first embodiment of the present invention configured as described above, as shown in FIG. 4, a channel search is first performed at predetermined periods (S10).

Subsequently, broadcast channel information received according to the channel search is compared with preset broadcast channel information (S20).

In operation S30, it is determined whether the changed channel information exists according to the comparison result.

Subsequently, when the changed channel information exists, the predetermined broadcast channel information is updated based on the newly received broadcast channel information (S40).

In operation S50, change information of all channels whose broadcast channel information is changed is displayed. That is, the broadcast channel information that was broadcast before the broadcast channel information is changed for each channel and the change information including the broadcast channel information that is broadcasted on the channel in the future by changing the broadcast channel information are displayed at regular intervals.

In addition, in the control method of the image display device according to the second embodiment of the present invention configured as described above, as shown in FIG. 5, a channel search is first performed at predetermined periods (S100).

Subsequently, broadcast channel information received according to the channel search is compared with preset broadcast channel information (S110).

In operation S120, it is determined whether there is changed channel information according to the comparison result.

Subsequently, if the changed channel information exists (S120), the preset broadcast channel information is updated based on the newly received broadcast channel information (S130).

In operation S140, a channel switching command is received from the outside.

Subsequently, it is determined whether the channel to be switched is included in the channel whose broadcast channel information is changed (S150). That is, it is determined whether channel information of the channel to be switched has changed.

In addition, if the channel to be switched is included in the channel in which the broadcasting channel information is changed, the determination result (S150), the existing channel information previously broadcasted by the channel and the change information including the changed channel information of the existing channel. Display (S160).

Subsequently, it is determined whether a channel switch command to the provided change channel information is input (S170).

When the channel change command to the change channel information is input (S170), the switch to the change channel in which the existing channel is currently airing is performed (S180).

As such, the image display device and its control method according to an embodiment of the present invention can easily respond to the channel information unilaterally changed by the broadcasting station, and the changed until the user becomes accustomed to the changed channel. By continuously providing information on channels, users can greatly improve their convenience in watching TV.

1 is a block diagram showing the configuration of a video display device according to an embodiment of the present invention.

2 is a view for explaining change information according to a first embodiment of the present invention;

3 is a view for explaining change information according to a second embodiment of the present invention;

4 is a flowchart illustrating a step-by-step control method of an image display device according to a first embodiment of the present invention.

5 is a flowchart illustrating a control method of an image display device according to a second embodiment of the present invention in detail.

<< Explanation of symbols for main part of drawing >>

10: memory unit 20: broadcast receiving unit

30: video signal processor 40: display unit

50: control unit 60: change information screen generation unit

Claims (13)

A memory unit for storing preset broadcast channel information; A broadcast receiver configured to receive a broadcast signal input from the outside and perform channel searching; And, And a controller configured to control the channel search of the broadcast receiving unit at predetermined intervals to recognize whether the stored broadcast channel information is changed, and to control to display the changed information of the broadcast channel according to whether the broadcast channel information is changed. Display device. The method of claim 1, And the control unit compares the stored broadcasting channel information with the broadcasting channel information received through the broadcasting receiving unit and recognizes whether the preset broadcasting channel information is changed. The method of claim 1, And the change information includes previous broadcast channel information and current broadcast channel information for each changed channel for which the broadcast channel information has been changed. The method of claim 1, And the controller controls the change information to be displayed when a switch command to a channel whose broadcast channel information is changed from the outside is displayed. The method of claim 4, wherein The displayed change information includes existing broadcast channel information of the switched channel and changed broadcast channel information of the existing broadcast channel. The method of claim 5, And the controller controls switching of the existing broadcast channel to a changed broadcast channel according to a command input from the outside. Performing channel search at regular intervals; Recognizing whether to change preset broadcast channel information according to the performed channel search result; And, And displaying change information of a broadcast channel whose channel information is changed according to whether the preset broadcast channel information is changed. The method of claim 7, wherein Recognizing whether the preset broadcast channel information is changed And comparing the preset broadcast channel information with the broadcast channel information received during the channel search to recognize whether the preset broadcast channel information is changed. The method of claim 7, wherein And when the change of the preset broadcast channel information is recognized, updating preset broadcast channel information by using the changed broadcast channel information. The method of claim 6, Displaying the change information of the broadcast channel is changed the channel information And displaying change information including previous broadcast channel information and current broadcast channel information for each broadcast channel whose channel information has been changed. The method of claim 7, wherein Displaying the change information of the broadcast channel is changed the channel information The control method of a video display device, characterized in that the step is performed when a switch command to the broadcast channel from which the channel information is changed from the outside. The method of claim 11, Displaying the change information of the broadcast channel And displaying the existing broadcast channel information of the channel to be switched and the changed broadcast channel information of the existing broadcast channel. The method of claim 12, And switching to a change broadcast channel of the existing broadcast channel according to a command input from the outside.

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