KR20090127560A - Display apparatus and channel search method - Google Patents

Abstract

PURPOSE: An image display apparatus and a channel search method are provided to designate a search condition of a program, thereby selectively searching only a desired channel. CONSTITUTION: An additional information detection unit(150) detects a channel additional information stream from a broadcast stream through a broadcast receiving unit(100). A controller(160) analyzes the detected additional information stream. The controller configures a channel map based on channel information which satisfies channel search conditions pre-stored in a memory unit(140).

Description

How to search video display device and channel {DISPLAY APPARATUS AND CHANNEL SEARCH METHOD}

The present invention relates to an image display device, and more particularly, to an image display device and a channel search method for specifying a search condition when setting an automatic / manual channel and providing information of a program in service in a channel currently searched. It is about.

BACKGROUND ART In general, a video display device includes a television, and in recent years, the television technology has been developed to improve the transmission of broadcast signals due to the development of broadcasting technology, and accordingly, the interest in digital television using the digital transmission method is increasing. Digital televisions transmit analog broadcast signals in digital form, minimizing the effects of noise and facilitating the reproduction of the original image.

Recently, such a video display device can receive various broadcasting channels through cable or satellite broadcasting unlike the past, which can only receive over-the-air channels, thus providing users with at least 50 channels and more than 100 channels. The user has a lot of difficulties in managing such a large number of channels effectively.

In addition, in terrestrial digital (DVB-T) broadcasting, three to 20 logical channels (services or programs) usually have one physical channel such as SD (standard definition) level service, data service, and single audio service. Multiplexed to and transmitted.

Therefore, in general, it takes about 2-3 minutes and as much as 10 minutes to perform the search for all the channels.

However, conventionally, there is no function for setting a search condition according to a user's request. Accordingly, after deleting a previously stored channel map, the channel map is reconstructed by searching for all channels existing in the VHF to UHF frequency domains. There is a problem that can not provide a channel map that satisfies the requirements.

In addition, by providing only information on the number of video channels and radio channels included in the corresponding physical channel to the user during channel discovery, the user may not be able to effectively check the information of the logical channel according to the physical channel to be searched.

That is, as shown in FIG. 1, the channel search display interface according to the related art includes a first information display area 10 in which information about the number of logical channels included in a channel currently being searched and a physical channel currently being searched are displayed. A second information display area 20 for displaying information and a third information display area 30 for providing a channel search progress in the form of a progress bar are included.

Only information about the number of logical channels included in the physical channel currently being searched may be displayed in the first information display area 10, or information about the number of cumulative logical channels included in all the physical channels searched so far may be displayed. have.

In addition, information on the physical channel currently being searched is displayed in the second information display area 20, and search progress status information performed so far is displayed on the basis of all search channels in the third information display area 30. .

In addition, conventionally, channel search is performed in a state where image muting is set during channel search as described above.

Accordingly, by simply displaying the information of the number of video channels and radio panels that were finally searched, the user cannot know which program has been searched during the channel navigator, and accordingly, the entire searched channels are manually displayed based on the channel up / down. There is a hassle to check by tuning.

In addition, by performing the channel search in the state of muting the image as described above, there is a problem that the user is bored for a long time when the channel search is performed.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object thereof is to allow a user to selectively search only a program satisfying a condition to be searched by a user by setting a channel search condition during channel search.

In addition, there is another purpose to effectively provide the user with information of the currently searched channel when performing channel search.

The video display device according to the present invention includes a broadcast receiving unit for receiving and processing a broadcast stream for each channel input from the outside; An additional information detector for detecting an additional information stream for each channel from the broadcast stream received through the broadcast receiver; A key input unit for receiving a request command from a user; A memory unit which stores preset channel search condition information through the key input unit; And a controller configured to analyze the additional information stream detected through the additional information detector and to configure a channel map based on channel information satisfying a channel search condition previously stored in the memory unit.

In addition, the channel search method of the image display device according to the present invention, if a channel search command is received, receiving a broadcast stream for each channel input from the outside; Detecting an additional information stream for each channel from the received broadcast stream; Comparing the extracted additional information stream for each channel with a preset channel search condition; And constructing a channel map based on the channel information satisfying the channel search condition according to the comparison result.

In the image display device and the channel search method according to the present invention, the user can selectively search only a desired channel by specifying a search condition of a program when searching for a channel, and thus, there is no need to perform a separate program editing. By providing information about the channel, it is possible to check which programs were searched during the channel search, and also to improve the user's convenience by showing the representative image of the search channel.

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

2 is a block diagram showing a configuration of an image display device according to the present invention, FIG. 3 is a view for explaining a channel search condition according to the present invention, and FIG. 4 is a channel search display screen provided according to the present invention. 5 is a view illustrating a display screen provided when searching for a channel according to the present invention, and FIG. 6 is a flowchart illustrating a step-by-step method for searching for a channel of an image display device according to the present invention.

As shown in FIG. 2, the image display device according to the present invention includes a broadcast receiving unit 100 for receiving and processing a broadcast stream for each channel input from the outside and a broadcast signal received through the broadcast receiving unit 100. A video signal processor 110 for receiving a video signal and processing the signal for display, a display unit 120 for outputting a video signal processed through the video signal processor 110, and receiving a request command from a user. A key input unit 130 for storing the memory 140 for storing channel search condition information preset through the key input unit 130, and an additional information stream for each channel from the broadcast stream received through the broadcast receiving unit 100. The additional information detector 150 detects the additional information stream and the additional information stream detected by the additional information detector 150, and stores the information in the memory 140. A controller 160 constituting a channel map based on channel information satisfying channel search conditions, and an OSD generator 170 generating an on-screen display of a channel search display screen according to the progress of the channel search. It is configured by.

In addition, the broadcast receiver 100 includes a tuner 102, a demodulator 104, and a demultiplexer 106.

The operation of the image display device according to the present invention configured as described above is 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 100 receives a broadcast signal transmitted from the outside through an antenna (not shown).

That is, the broadcast receiving unit 100 is a tuner 102 for tuning a broadcast signal having a frequency band corresponding thereto according to a tuning control signal of the controller 160 to be described later, and the broadcast signal of the tuned specific channel VSB (Vestigial). Sideband) Demodulation unit 104 for outputting in the form of a transport stream through a demodulation process and error correction process, and the signal output in the form of a transport stream through the demodulator 104, video signal, audio signal and system information And a demultiplexer 106 which separates into a variety of additional data defined by (System Information) and outputs it in the form of a bit stream.

The video data separated by the demultiplexer 106 is processed by the image signal processor 110 and displayed on the display 120.

In this case, the image signal processing unit 110 includes an MPEG-2 decoder and a scaler for converting the video data to match the vertical frequency, resolution, aspect ratio, etc., of the output standard of the display unit 120.

The display unit 31 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 audio signal separated through the demultiplexer 106 may be processed by an audio processor (not shown) and output to a speaker (not shown). The audio processor (not shown) may include an AC-3 decoder. have.

On the other hand, the additional information data according to the SI separated by the demultiplexer 106 is stored in the memory unit 140 by the controller 160 to be described later.

The memory unit 140 may be implemented by an electrically erasable programmable read-only memory (EEPROM).

In addition, the memory unit 140 stores channel search condition information preset by a user.

That is, the image display device according to the present invention may set the channel search condition according to the case where the channel display belonging to a specific genre is selectively searched and stored during the channel search.

Here, the channel search condition is information such as genre, producer, producer right, broadcaster, main character, and the like. Hereinafter, embodiments of the present invention will be described based on genre conditions among the channel search conditions.

In other words, when a channel search condition setting command is input from a user as shown in FIG. 3, a menu screen for setting the channel search condition is displayed, and a genre desired by the genre setting area 200 of the menu screen is displayed. By selecting only, the channel search condition can be set.

Here, the genre includes drama, comedy, news, sports, and movie, and the user may select at least one or more of the various genres. In addition, the genre setting area 200 also includes a menu for selecting all genres, and when the entire genre is selected by the user, the controller 160 performs channel searching for all genres in the same manner as the existing channel searching operation. do.

That is, the user may select one or more genres desired by the user among the various genres, and the controller 160 selectively extracts only channels satisfying the channel search condition set by the user when searching for channels, and thus channels. Construct a map.

The additional information detector 150 may extract program association table (PAT), program map table (PMT), service descriptor table (SDT), and event information table (EIT) information from the additional information separated by the demultiplexer 106. Extract.

That is, the additional information detector 150 may determine the genre information of each channel according to the channel search condition according to the control signal of the controller 160 and broadcast name information of the logical channel included in each physical channel. SDT for checking and PAT and PMT for checking the number information of logical channels included in the physical channel are extracted.

In other words, the PAT includes information on how many logical channels exist in the current physical channel.

PAT (v: 4 s: 1/1) TS_ID: 0x1 3 programs

Program Number: PMT_PID

0x0052: 0x0334

0x0053: 0x033E

0x0055: 0x0352

As described above, each PAT has a PMT PID corresponding to each channel.

Thus, a program with a value of 0x0052 can see that the logical channel is number 85 in the NIT.

NIT Information

ID: ver: section: name

0x7FFE: 31: 1/1: SFN_TVB

TS ID: ON ID (1)

0001: 7FFE

SVC ID: LCN (v)

0055: 0085 (1)

0052: 0082 (1)

0053: 0083 (1)

In the SDT, broadcast name information on each logical channel can be known.

// SDT

SDT Information [type], $ = schedule, @ = scrambled

TS ID: ON ID: ver: section

0001: 7FFE: 1: 1/1

SVC ID: PROV: NAME

 -----------------------------------------------

  [1] $ 0052: TVB: J2

  [1] $ 0053: TVB: Interactive Information Channel

  [1] $ 0055: TVB: High Definition Jade

In addition, the EIT is provided for each source ID (source_id), that is, in logical channel units that are viewed by the actual viewer, not in physical channel units, and the contents of the EIT are included in about 3 hours provided by the EIT. Information such as the number of programs, the start time, length, title and genre of each program is provided for each logical channel.

Accordingly, the controller 160 may check genre information of a logical channel existing in the physical channel currently being searched based on the additional information of the corresponding channel detected by the additional information detector 150.

The controller 160 selectively extracts only channel information satisfying a predetermined channel search condition from the user according to the checked genre information of the logical channel and configures a channel map accordingly.

As such, when the user sets a channel search condition according to a specific genre during channel search, the controller 160 checks genre information of a program according to each channel and generates a channel map composed of programs that satisfy the channel search condition. Can be configured.

In addition, the controller 160 configures the channel map for each genre and provides the user with a channel in order to perform channel search more effectively.

That is, the controller 160 configures a channel map for each genre such as a channel map composed of channel information of a news genre, a channel map composed of channel information of a movie genre, and a channel map composed of channel information of a sports genre, and provides the user with a channel map. The user may set a channel map according to a genre desired by the user, and selectively watch only a program according to a specific genre.

In addition, the controller 160 outputs a control signal to display a channel search display screen according to the progress of the channel search.

The OSD generator 170 generates a channel search display screen according to the ongoing channel search in OSD form according to the control signal of the controller 160.

At this time, the controller 160 controls the various additional information of the channel currently being searched to be displayed on the channel search display screen based on the additional information detected by the additional information detector 150.

That is, the controller 160 identifies the number information of the logical channels included in the currently searched physical channel and the name information of the logical channel based on the additional information, and accordingly the number information and the name information of the logical channel are Control to be displayed on the channel search display screen.

In other words, as shown in FIG. 4, the channel search display screen generated by the OSD generator 170 may include a first information display area 300 in which specific physical channel information currently being searched is displayed, and the physical channel. A second information display area 310 in which information on the number of logical channels included is displayed, a third information display area 320 in which broadcast name information of each logical channel included in the physical channel is displayed, and an entire search channel. As a reference, a fourth information display area 330 that displays progress information of the current search is included.

In this case, the second information display area 310 is configured based on the additional information of the corresponding channel detected by the additional information detector 150.

Accordingly, when searching for a channel, the user may not only check the number of logical channels for a specific physical channel but also broadcast name information of the logical channels.

In addition, the controller 160 selects a representative logical channel of a specific physical channel currently being searched for when searching for the channel, and controls the program currently being broadcasted in the corresponding channel to be displayed for a predetermined time through the display unit 120. .

That is, as shown in FIG. 5, the display screen provided during channel search is not only the channel search display screen shown in FIG. 4, but also one side of the display screen includes image data about a representative logical channel of the physical channel currently being searched. 400 is displayed.

Therefore, the user can watch a program that is broadcasted in each channel currently searched without having to wait for the channel search to be completed at the time of channel search.

As such, the image display device according to the present invention designates a search condition of a program when searching for a channel, so that the user can selectively search only a desired channel, and thus, there is no need to perform a separate program editing. By providing information, you can check which programs were searched during the channel search, and improve the user's convenience by showing the representative image of the search channel.

In the channel search method of the image display device according to the present invention configured as described above, as shown in FIG. 5, when a channel search condition setting command is input from a user, a menu screen for setting the channel search condition is displayed (S100). ).

Subsequently, a channel search condition is set according to a command input from the outside on the menu screen (S110). That is, the channel search condition is set by receiving various genres including drama, comedy, news, sports, and movies, and at least one selection information for setting the channel search condition among producers, producers, broadcasters, and main characters. . In other words, if the user selects genre information, the sub-genre information desired by the user is selected from the genre information to set the channel search condition. Hereinafter, it is assumed that the set channel search condition is genre information.

In operation S120, it is determined whether a channel search command is input from the outside.

Subsequently, when a channel search command is input from the outside (S120), the first channel is searched (S130).

In operation S140, it is determined whether an actual broadcast program exists in the searched channel.

Subsequently, when the actual broadcast program exists in the search channel (S140), PAT, PMT, and SDT are extracted from additional information included in the broadcast signal, and the number of information and the broadcast name of logical channels included in the channel are extracted. Check the information (S150).

Then, the EIT is extracted from the additional information included in the broadcast signal to extract genre information for each logical channel (S160).

Subsequently, it is determined whether the extracted genre information satisfies the preset channel search condition (S170). That is, it is determined whether the extracted genre information is included in the genre information set by the user.

If the genre information of the channel satisfies a preset channel search condition (S170), the channel information is added to the channel map (S180).

Subsequently, a channel search display screen is generated and displayed based on the checked number information of the logical channels and broadcast name information (S190).

Then, the representative logical channel included in the physical channel currently being searched is selected, and the program of the corresponding channel is output to the outside for a predetermined time (S200).

Subsequently, it is determined whether the searched channel is the last channel or whether a channel search cancel command is input from the outside (S210).

In operation S210, the searched channel is the last channel or terminates when a channel search cancel command is input from the outside. Otherwise, the search channel is set as the previous search channel + 1 to set the channel to be searched (S220). Return to S140).

In addition, the operation is repeatedly performed for each genre, and accordingly, a channel map is constructed for each genre of the broadcast program and provided to the user.

As described above, the image display device and the channel search method according to the present invention designate a search condition of a program at the time of channel search, so that the user can selectively search only a desired channel, so that there is no need to perform a separate program editing. By providing information on the searched channels, you can check which programs were searched during the channel search, and also improve the user's convenience by showing the representative image of the search channel.

1 is a diagram illustrating a channel search display screen according to the prior art;

2 is a block diagram showing the configuration of an image display device according to the present invention;

3 is a view for explaining a channel search condition according to the present invention.

4 illustrates a channel search display screen provided in accordance with the present invention.

5 is a view showing a display screen provided during channel search according to the present invention.

6 is a flowchart illustrating a step-by-step method for searching a channel of an image display device according to the present invention.

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

100: broadcast receiving unit 110: image signal processing unit

120: display unit 130: key input unit

140: memory unit 150: additional information detection unit

160: control unit 170: OSD generation unit

Claims (14)

A broadcast receiver for receiving and processing a broadcast stream for each channel input from the outside; An additional information detector for detecting an additional information stream for each channel from the broadcast stream received through the broadcast receiver; A key input unit for receiving a request command from a user;  A memory unit which stores preset channel search condition information through the key input unit; And, And a controller configured to analyze the additional information stream detected by the additional information detector, and thereby configure a channel map based on channel information satisfying a channel search condition previously stored in the memory unit. The method of claim 1, The channel search condition is at least one or more of a preset genre, a producer, a producer, a broadcaster, and a main character of a user. The method of claim 2, And the memory unit stores the channel map divided for each specific condition selected by the user according to the control signal of the controller. The method of claim 1, And an on-screen display (OSD) generating unit for generating a channel search display screen according to a progress of the channel search on an on-screen display. The method of claim 4, wherein And the controller analyzes the additional information stream for each channel to control the number of logical channels and broadcast name information included in a specific physical channel currently being searched to be displayed on the channel search screen. The method of claim 5, And the controller controls the video signal of a representative logical channel included in the physical channel currently being searched to be output to the outside for a predetermined time during the channel search. Receiving a channel-specific broadcast stream input from the outside when a channel search command is received; Detecting an additional information stream for each channel from the received broadcast stream; Comparing the extracted additional information stream for each channel with a preset channel search condition; And, And constructing a channel map based on the channel information satisfying the channel search condition according to the comparison result. The method of claim 7, wherein And receiving a condition of at least one of a genre, a producer, a producer, a broadcaster, and a main character from a user, and setting a channel search condition. The method of claim 8, Comprising the channel map Comprising a channel map for each of the set at least one condition comprising the step of configuring a channel search method of the video display device. The method of claim 7, wherein And displaying a channel search display screen according to the progress of the channel search. The method of claim 10, Displaying the channel search display screen And analyzing the extracted additional information stream for each channel and displaying a channel search display screen including information on the number of logical channels and broadcast name information according to a physical channel currently being searched. The method of claim 11, And outputting an image signal of a representative logical channel included in a physical channel currently being searched to the outside for a predetermined time. A first information display area in which specific physical channel information currently being searched is displayed; A second information display area on which information about the number of logical channels included in the physical channel is displayed; And, And a third information display area in which broadcast name information of each logical channel included in the physical channel is displayed. The method of claim 13, And a video data display area in which video data of a representative logical channel included in the physical channel currently being searched is displayed for a predetermined time.

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