KR101535146B1 - Image display device and operation method thereof - Google Patents

Abstract

The present invention relates to an image display apparatus and an operation method thereof. According to the embodiment of the present invention, channel information that can be selected by the user at the time of manual tuning is provided, and channel information not stored in the current channel map and whether or not the channel information is changed can be set to be added or not. Also, even if the user does not know the physical channel (MUX) information, the user can view the provided information and manually add the channel.

Video display device, channel map, MUX

Description

Technical Field [0001] The present invention relates to an image display device and an operation method thereof,

The present invention relates to an image display apparatus and an operation method thereof, and more particularly, to an image display apparatus using manual tuning, in which physical channel (MUX) information is provided to a user so that a user can manually add a desired channel To a video display apparatus and an operation method thereof.

A video display device is a device having a function of displaying an image that a user can view. The user can view the broadcast through the video display device. A video display device displays a broadcast selected by a user among broadcast signals transmitted from a broadcast station on a display. Currently, broadcasting is changing from analog broadcasting to digital broadcasting around the world.

Digital broadcasting refers to broadcasting in which digital images and sound signals are transmitted. Compared to analog broadcasting, digital broadcasting is strong against external noise and has a small data loss, is advantageous for error correction, has a high resolution, and provides a clear screen. Also, unlike analog broadcasting, digital broadcasting is capable of bidirectional service.

A channel map is constructed by searching valid broadcast channels in which a broadcast signal exists among a plurality of broadcast channels received in response to a user channel search command. The channel map is then used for channel-related operation control.

However, conventionally, the channel map configuration is performed after a predetermined time is consumed through auto tuning. In this case, there are inconveniences that all the changes and settings made by the user during use are initialized. In addition, in the case of adding a channel by using the manual tuning menu in the case of the global direction, there is inconvenience that the user must know the corresponding physical channel (MUX) number and input it correctly.

Accordingly, it is an object of the present invention to provide an image display apparatus and an operation method thereof, in which a user can efficiently add a specific channel to a channel map through manual tuning.

According to an aspect of the present invention, there is provided a method of operating a video display device, the method including receiving a manual tuning command, detecting physical channel (MUX) information based on a broadcast signal, Extracting a change information list of the physical channel by comparing the physical channel information of the channel map with the physical channel information of the previously stored channel map, and displaying the change information list on the display.

According to another aspect of the present invention, there is provided an image display apparatus including a display, a tuner for receiving a broadcast signal, an interface for receiving a manual tuning command, A signal processing unit for detecting physical channel (MUX) information based on the broadcast signal, and extracting a physical channel change information list by comparing the detected physical channel information with physical channel information of a previously stored channel map, And a control unit for displaying the change information list on the display.

According to the present invention, even if the user does not know the physical channel (mux) information, it helps to manually update the newly registered channel. In addition, the video display device provides the newly registered, changed, and deleted channel information. It also has the convenience of adding the desired physical channel (mux) without Auto tuning.

Hereinafter, the present invention will be described in detail with reference to the drawings.

1 is an internal block diagram of an image display apparatus according to an embodiment of the present invention.

1, an image display apparatus 100 according to an exemplary embodiment of the present invention includes an image / audio processing unit 101, an interface unit 150, a storage unit 160, a display 170, 175 and a control unit 180. [

The video / audio processing unit 101 processes the inputted video signal or audio signal so that video or audio can be outputted to the display 170 and the audio output unit 175 of the video display device 100. [ To this end, the video / audio processing unit 101 may include a signal input unit 110, a demodulation unit 120, and a signal processing unit 140. The signal input unit 110 may include a tuner unit 111, an A / V input unit 112, a USB input unit 113, and a radio signal input unit 114.

The tuner unit 111 selects an RF broadcast signal corresponding to a channel selected by a user from among RF (Radio Frequency) broadcast signals received through an antenna, and outputs the selected RF broadcast signal as an intermediate frequency signal, Conversion. For example, if the selected RF broadcast signal is a digital broadcast signal, it is converted into a digital IF signal (DIF), and if the selected RF broadcast signal is an analog broadcast signal, it is converted into an analog baseband image or voice signal (CVBS SIF). That is, the tuner unit 111 can process a digital broadcast signal or an analog broadcast signal. The analog baseband video or audio signal (CVBS SIF) output from the tuner unit 111 can be directly input to the signal processing unit 140.

In addition, the tuner unit 111 can receive an RF broadcast signal of a single carrier according to an Advanced Television System Committee (ATSC) scheme or an RF broadcast signal of a plurality of carriers according to a DVB (Digital Video Broadcasting) scheme.

According to another embodiment of the present invention, the video display apparatus 100 may include at least two tuner units. In a case where at least two tuner units are provided, the second tuner unit selects an RF broadcast signal corresponding to a channel selected by the user among the RF broadcast signals received through the antenna, similar to the first tuner unit, Frequency signal or a baseband image or voice signal.

In addition, the second tuner unit may sequentially select RF broadcast signals of all broadcast channels stored through the channel memory function among the received RF broadcast signals, and convert the RF broadcast signals into an intermediate frequency signal, a baseband image, or a voice signal. And the second tuner unit may periodically perform the conversion operation of all the broadcast channels. Accordingly, the image display apparatus 100 can display the image of the broadcast signal converted through the first tuner unit, and can provide images of the plurality of channels converted through the second tuner unit in a thumbnail form. In this case, the first tuner unit converts a main RF broadcast signal selected by the user into an intermediate frequency signal, a baseband image or a voice signal, and the second tuner sequentially / periodically selects all RF broadcast signals except for the main RF broadcast signal It can be converted into an intermediate frequency signal or a baseband image or a voice signal.

The demodulator 120 receives the digital IF signal DIF converted by the tuner 111 and performs a demodulation operation. For example, when the digital IF signal output from the tuner unit 111 is the ATSC scheme, the demodulation unit 120 performs 8-VSB (8-Vestigal Side Band) demodulation. As another example, when the digital IF signal output from the tuner unit 111 is a DVB system, the demodulator 120 performs CODDMA (Coded Orthogonal Frequency Division Modulation) demodulation.

Also, the demodulation unit 120 may perform channel decoding. To this end, the demodulator 120 includes a trellis decoder, a de-interleaver, and a reed solomon decoder to perform trellis decoding, deinterleaving, Solomon decoding can be performed.

The demodulation unit 120 may perform demodulation and channel decoding, and then output a stream signal TS. At this time, the stream signal may be a signal in which a video signal, a voice signal, or a data signal is multiplexed. For example, the stream signal may be an MPEG-2 TS (Transprt Stream) in which an MPEG-2 standard video signal, Dolby AC-3 standard audio signal, etc. are multiplexed. Specifically, the MPEG-2 TS may include a header of 4 bytes and a payload of 184 bytes.

The stream signal output from the demodulation unit 120 may be input to the signal processing unit 140. The signal processing unit 140 performs demultiplexing, signal processing, and the like, and then outputs an image to the display 170 and outputs a voice to the voice output unit 175.

In the case of a video display apparatus having at least two tuner units, a demodulating unit corresponding to the number of demultiplexer units may be provided. The demodulator may be provided separately according to the ATSC scheme and the DVB scheme.

The external signal input unit 128 performs signal input with an external device. To this end, the external signal input unit 128 may include an A / V input / output unit and a wireless communication unit.

The external signal input unit 128 is connected to an external device such as a DVD (Digital Versatile Disk), a Blu ray, a game device, a camcorder, a computer (notebook computer), etc. and outputs an external input video signal, And transmits the input data signal to the controller 160 in the image display apparatus 100. Further, the video signal, audio signal, and data signal processed in the control unit 160 can be output to another external device.

The A / V I / O unit is provided with an Ethernet terminal, a USB terminal, a CVBS (Composite Video Banking Sync) terminal, a component terminal, and an S-video terminal (analog terminal) for inputting / ), A DVI (Digital Visual Interface) terminal, an HDMI (High Definition Multimedia Interface) terminal, an RGB terminal, a D-SUB terminal, an IEEE 1394 terminal, a SPDIF terminal, and a Liquid HD terminal.

The CVBS terminal, and the S-video terminal can be converted into a digital signal through the first analog / digital conversion unit 140, as described above. The digital signal input through other input terminals can be input to the channel browsing processing unit 170 without analog / digital conversion.

The wireless communication unit can perform a wireless Internet connection. For example, WLAN (Wireless LAN) (Wi-Fi), Wibro (Wireless broadband), Wimax (World Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access) .

Further, the wireless communication unit can perform short-range wireless communication with other electronic devices. For example, Bluetooth, Radio Frequency Identification (RFID), infrared data association (IrDA), Ultra Wideband (UWB), ZigBee, and the like can be used.

Meanwhile, the external signal input unit 128 may be connected to the various set-top boxes through at least one of the various terminals described above to perform input / output operations with the set-top box. For example, when the set-top box is a set-top box for an IP (Internet Protocol) TV, the video, audio, and data signals processed in the settop box for IPTV can be transmitted to the controller 160, The control unit 160 may transmit the processed signals to the IPTV set-top box.

Meanwhile, the IPTV may include ADSL-TV, VDSL-TV, FTTH-TV and the like depending on the type of the transmission network. The IPTV may include a TV over DSL, a video over DSL, a TV over IP BTV), and the like. In addition, IPTV may also mean an Internet TV capable of accessing the Internet, or a full browsing TV.

The signal processing unit 140 demultiplexes the received stream signal, for example, the MPEG-2 TS, into a video signal, a voice signal, and a data signal, respectively. Also, the signal processing unit 140 can perform image processing of the demultiplexed video signal. For example, if the demultiplexed video signal is a coded video signal, it can be decoded. Specifically, when the demultiplexed video signal is an MPEG-2 standard-coded video signal, it can be decoded by an MPEG-2 decoder. Also, if the demultiplexed video signal is a video signal of the H.264 standard according to the DMB (Digital Multimedia Broadcasting) scheme or DVB-H, it can be decoded by the H.264 decoder.

In addition, the signal processing unit 140 may process brightness, tint, and color of a video signal. The video signal processed by the signal processing unit 140 is displayed on the display 170. Also, the signal processing unit 140 can perform the voice processing of the demultiplexed voice signal. For example, if the demultiplexed speech signal is a coded speech signal, it can be decoded. Specifically, when the demultiplexed speech signal is an MPEG-2 standard encoded speech signal, it can be decoded by an MPEG-2 decoder. In addition, if the demultiplexed speech signal is a coded voice signal of the MPEG 4 BSAC (Bit Sliced Arithmetic Coding) standard according to a terrestrial DMB (Digital Multimedia Broadcasting) scheme, it can be decoded by an MPEG 4 decoder. Also, if the demultiplexed speech signal is an encoded audio signal of the AAC (Advanced Audio Codec) standard of MPEG 2 according to the satellite DMB scheme or DVB-H, it can be decoded by the AAC decoder.

In addition, the signal processing unit 140 can process a base, a treble, a volume control, and the like.

The voice signal processed by the signal processing unit 140 is output to the voice output unit 175 by voice. In addition, the signal processing unit 140 may perform data processing of the demultiplexed data signal. For example, if the demultiplexed data signal is a coded data signal, it can be decoded. The encoded data signal may be EPG (Electronic Program Guide) information including broadcast information such as a start time and an end time of a broadcast program broadcasted on each channel. For example, the EPG information may be ATSC-PSIP (ATSC-Program and System Information Protocol) information in the case of the ATSC scheme and DVB-Service Information (DVB-SI) information in case of the DVB scheme . The ATSC-PSIP information or DVB-SI information may be information included in the above-described stream, i.e., the header (4 bytes) of the MPEG-2 TS.

In addition, the signal processing unit 140 may perform an OSD (On Screen Display) process. Specifically, the signal processing unit 140 generates a signal on the screen of the display 170 based on at least one of the image-processed video signal and the data-processed data signal, and a user input signal input through the remote control apparatus 200 Various information can be displayed in graphic or text.

The storage unit 160 may store a program for each signal processing and control in the control unit 180 or may store a video signal, a voice signal, or a data signal subjected to signal processing. Also, the storage unit 160 may perform a function of temporarily storing video, audio, or data signals input to the signal input unit 110. [

The storage unit 160 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory) RAM, ROM (EEPROM, etc.), and the like. The video display apparatus 100 can reproduce and provide a file (moving picture file, still picture file, music file, document file, etc.) stored in the storage unit 160 to a user.

The controller 180 controls the overall operation of the image display apparatus 100. The control unit 180 can receive signals transmitted from the remote control device 200 through the interface unit 150. [ The control unit 180 determines a command input by the user to the remote control apparatus 200 through the received signal and controls the image display apparatus 100 to correspond to the command. For example, when the user inputs a predetermined channel selection command, the controller 180 controls the tuner unit 111 such that the selected channel is input through the signal input unit 110. In addition, the signal processor 140 is controlled to process the video signal and the audio signal of the selected channel. In addition, the control unit 140 controls the signal processing unit 140 so that the channel information selected by the user can be outputted through the display 170 or the audio output unit 175 together with the processed video signal and audio signal.

As another example, the user can input another kind of video or audio output command through the remote control device 200. [ That is, the user may desire to watch the camera or camcorder image signal inputted through the USB input unit 113 instead of the broadcast signal. In this case, the control unit 180 processes the video signal or audio signal input through the USB input unit 113 of the signal input unit 110 through the signal processing unit 140 and transmits the video signal or audio signal through the display 170 or the audio output unit 175 Audio processing unit 101 so as to be output.

The control unit 180 determines the user command inputted to the user input unit 155 formed in the image display apparatus 100 and controls the image display apparatus 100 to correspond to the command inputted through the remote control apparatus 200 . For example, the user can input an on / off command, a channel change command, a volume change command, and the like through the user input unit 155. The user input unit 155 may be a button or a key formed on the image display apparatus 100. The control unit 180 may determine whether the user input unit 155 has been operated and control the image display apparatus 100 accordingly.

2 is a view showing a screen displaying an automatically tuned channel diagnosis menu.

The video display device provides a Diagnostics menu 210 showing information of the channel. The diagnostic menu 210 shows the total physical channel information and MUX information captured by auto-tuning. At this time, the MUX information is based on a phisical frequency. In FIG. 2, the MUX information is shown as a channel name. Frequency information, and the like.

As shown in FIG. 2, when the user enters the diagnostic menu, all the physical channels detected during the auto-tuning are sorted in decreasing order, that is, in order from smallest to largest. Of course, the order in which they are listed may vary depending on the configuration. The MUX number 220 and the signal strength 230, which are essential information of the received channel to be searched by auto-tuning, and in addition, additional information can be displayed.

When the automatic tuning operation is performed, the channel information of the channel map previously stored and managed is unconditionally updated with the new channel information. Therefore, there is a problem that the specific broadcast information that is arbitrarily set, edited, or deleted by the user is initialized .

In addition, since the reservation information and the preference channel information are information set based on the channel information previously stored and managed, there arises a problem that the reservation information and the preference channel information are inconsistent with the newly updated channel information, The channel information stored and managed in the broadcast channel can not be compared and confirmed.

In addition, since it sequentially scans the broadcast signals of all the bands and detects the physical channel (MUX) information, it takes a certain time, and the time required also increases according to the tendency of the digital TV in which the number of channels is rapidly increasing.

Therefore, a manual tuning menu can be used to allow a user to add only a specific channel to the channel map, or to manage the channel map.

3 is a view showing a screen in which a manual tuning menu is displayed.

The manual tuning menu 300 includes a physical channel (MUX) information input window 310 and a signal strength indicator 320 to indicate the signal status of a physical channel to be added.

However, since there is no additional information about the physical channel (MUX) in the manual tuning menu 300, the user must input the correct number information for the physical channel (MUX) to be added without any assistance. Thus, if a user knows information about a physical channel (MUX), it could add, modify, or delete it.

However, the user can not know the physical channel (MUX) information other than the method of performing the above-described automatic tuning, and if the physical channel (MUX) information is not known or the physical channel (MUX) is changed, the user should finally perform automatic tuning.

Therefore, in the case of using the manual tuning menu without using the automatic tuning in order to maintain only the channel information of the channel map preset by the user, only a part of the information is limited due to lack of related information.

4 is a flowchart illustrating a method of operating an image display apparatus according to an exemplary embodiment of the present invention.

4, an operation method of an image display apparatus according to an exemplary embodiment of the present invention includes receiving a manual tuning command (S410), detecting physical channel (MUX) information based on a broadcast signal S420), extracting a change information list of the physical channel by comparing the detected physical channel information with physical channel information of a channel map (S430), and displaying the change information list on the display S440).

A manual tuning instruction of the user is received by the video display apparatus 100 through the interface unit 150. In operation S410, the signal input unit 140 receives the broadcast tuning signal from the tuner unit 111, And controls to detect physical channel (MUX) information (S420)

The physical channel may include at least one virtual channel. In the conventional analog broadcasting, only one broadcasting information is transmitted to one program channel. However, in the case of DTV broadcasting, one channel can transmit HD (High Definition) and SD (Standard Definition) One physical channel may include one or more virtual channels. In particular, in the case of European DTV broadcasting, there are many dozens of virtual service channels on one physical channel (MUX) based on SD class. A plurality of broadcast virtual channels are multiplexed into one transport stream (TS) and transmitted on one frequency, and a physical channel (MUX) is a set of all virtual channels transmitted on one frequency.

For example, in terrestrial digital (DVB-T) broadcasting, usually three to twenty logical channels (services or programs), such as SD-class services and data services and single audio services, are multiplexed on one physical channel . When the video display device receives two or more physical channels (MUX), it extracts virtual channel information existing in each physical channel (MUX) to generate a channel map including all virtual channel information, A desired virtual channel can be selected using a map.

The control unit 180 compares the detected physical channel information with physical channel information of a previously stored channel map to extract a change information list of the physical channel having the changed physical channel information (S430)

The channel map may be stored in the control unit 180, the signal processing unit 140, or the like, or may be stored in an external storage device, but more preferably, in order to quickly change and manage the channel, It is preferable to further include a separate storage unit to be stored.

Also, in this case, the physical channel information detected in the step of detecting the physical channel information may be stored in the storage unit as a temporary channel map. The capacity of the detected physical channel information may increase or may be stored in the temporary channel map in preparation for an error and may be compared with the physical channel information of the previously stored channel map.

Then, the control unit 180 displays the extracted change information list on the display 170 (S440)

By displaying the change information list of the physical channel having the change, the user can know whether the addition, modification, or deletion is to be performed, and the manual tuning menu can be terminated, added, modified, or deleted based on the change information. Therefore, when only a part of the channel information is to be corrected in the channel map, in particular, in the case of channel addition, the user can easily update the channel map by inputting the changed physical channel information in the manual tuning menu.

The change information list may include a description of the type of change, either addition, modification, and deletion. Not only the changed physical channel information is displayed as a list, but also the change types are displayed together to further improve the user's convenience. Further, by displaying different colors according to the type of the change type, the visibility and convenience of the user can be further improved.

Also, in step S440 of displaying the change information list, an input window for adding a predetermined physical channel and a signal strength of the predetermined physical channel may be displayed together.

Meanwhile, the method of operating the image display apparatus according to the present invention may further include a step S460 of adding the predetermined physical channel to the channel map by the control unit 180 when the user has an instruction to add a predetermined physical channel (S450) .

The user can view the provided change information list and end the menu without adding. If the physical channel to be added is newly updated, the user can input it and add it to the channel map.

Also, the controller 180 may add all of the virtual channels included in the predetermined physical channel to the channel map.

FIGS. 5 and 6 are views illustrating a manual tuning menu according to an exemplary embodiment of the present invention. Referring to FIG.

FIG. 5 shows an embodiment in which a manual tuning menu 500 is displayed including a list of change information. Referring to FIG. 5, the manual tuning menu 500 includes a physical channel (MUX) information input window 510 and a signal strength indicator 520 showing a signal status of a physical channel to be added. In addition, the manual tuning menu 500 is displayed including a list of change information including changed physical channel (MUX) information 530, virtual channel information 540, and change type information 550.

When manual tuning is used by the user, information of the incoming signal is displayed to display the physical channel (mux) information and the modified / deleted physical channel (mux) information which are not stored in the channel map of the pre-stored current state So that the user can manually update the physical channel (mux) information using this information.

The information to be displayed may include information on a physical channel (mux), a virtual channel (virtual channel), and information added / deleted / changed according to the frequency table. Tuning and physical channel (mux) information are detected internally and compared with the current channel map, and the current state and changes are not mux Configure the information list to display information on the menu.

The user refers to the changed physical channel (MUX) information 530, virtual channel information 540 and change type information 550 and inputs the physical channel (MUX) information to be added to the physical channel (MUX) ) To be added to the channel map on a physical channel (MUX) basis. It is also possible to modify and update the changed physical channel (MUX) information.

6 shows an embodiment in which the manual tuning menu 600 and the change information list 700 are displayed separately. In this case, the change information list 700 can additionally be displayed without a change in the user interface UI attribute associated with the manual tuning menu 600. [ The change information list 700 may include modified physical channel (MUX) information 710, virtual channel information 720, and change type information 730.

In addition, the configuration and the method of the embodiments described above can be applied to a video display device and an operation method thereof according to the present invention, Or some of them may be selectively combined.

Meanwhile, the present invention can be embodied as a code readable by a processor in a processor-readable recording medium provided in an image display apparatus. The processor-readable recording medium includes all kinds of recording apparatuses in which data that can be read by the processor is stored. Examples of the recording medium readable by the processor include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like, and also a carrier wave such as transmission over the Internet. Also, the processor readable recording medium may be distributed over a networked computer system so that the processor readable code can be stored and executed in a distributed manner.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It should be understood that various modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.

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

2 is a view showing a screen displaying an automatically tuned channel diagnosis menu,

3 is a view showing a screen displaying a manual tuning menu,

FIG. 4 is a flowchart illustrating a method of operating an image display apparatus according to an exemplary embodiment of the present invention. Referring to FIG. 4,

FIGS. 5 and 6 are views illustrating a manual tuning menu according to an exemplary embodiment of the present invention. Referring to FIG.

Claims (19)

Receiving a manual tuning command; Detecting physical channel (MUX) information based on a broadcast signal; Extracting a change information list of a physical channel by comparing the detected physical channel information with physical channel information of a previously stored channel map; And And displaying the change information list on a display, Wherein the change information list includes a description of any change type of addition, modification, and deletion, Wherein the change information list displays the same change type with the same color. The method according to claim 1, Wherein the physical channel comprises at least one virtual channel. The method according to claim 1, Wherein the step of detecting the physical channel information stores the detected physical channel information in a temporary channel map. The method of claim 3, In the change information list extracting step, And extracting physical channel information in which there is a difference compared to the pre-stored channel map and the temporary channel map. delete delete The method according to claim 1, Wherein the step of displaying the change information list comprises: An input window for adding a predetermined physical channel, and a signal intensity of the predetermined physical channel. The method according to claim 1, Further comprising adding the predetermined physical channel to the channel map if there is an additional command of the predetermined physical channel. 9. The method of claim 8, And adding all the virtual channels included in the predetermined physical channel to the channel map. display; A tuner unit for receiving a broadcast signal; An interface unit receiving a manual tuning command; A signal processor for detecting physical channel (MUX) information based on the broadcast signal when the manual tuning command is received; And And a controller for comparing the detected physical channel information with physical channel information of a previously stored channel map to extract a change information list of the physical channel and displaying the extracted change information list on the display, Wherein the change information list includes a description of any change type of addition, modification, and deletion, Wherein the control unit displays the same change type in the change information list in the same color. 11. The method of claim 10, Wherein the physical channel comprises at least one virtual channel. 11. The method of claim 10, And a storage unit for storing the channel map. 13. The method of claim 12, Wherein the control unit stores the detected physical channel information in a temporary channel map of the storage unit. 14. The method of claim 13, Wherein the control unit extracts physical channel information having a difference compared to the pre-stored channel map and the temporary channel map. delete delete 11. The method of claim 10, Wherein the control unit displays an input window for registering a predetermined physical channel and a signal strength of the predetermined physical channel on the display. 11. The method of claim 10, Wherein the control unit adds the predetermined physical channel to the channel map if there is an instruction to add a predetermined physical channel. 19. The method of claim 18, Wherein the control unit adds all the virtual channels included in the predetermined physical channel to the channel map.

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