Broadcast receiving device and operating method thereof

Abstract

The present invention relates to a broadcast receiving device and an operation method thereof. A broadcast receiving device according to an embodiment of the present invention comprises: a broadcast receiving unit for wirelessly receiving broadcast signals; an external device interface unit having at least one communication module for performing short-distance communication; and a control unit; the control unit determines whether a frequency band for receiving broadcast signals overlaps with a first frequency band preset for short-distance communication. When the frequency band for receiving broadcast signals does not overlap with the first frequency band, the first frequency band can be determined as a frequency band for short-distance communication. When at least a portion of the first frequency band overlaps with a frequency band for receiving broadcast signals, the remaining frequency band in the first frequency band except for the portion overlapping with the frequency band for receiving broadcast signals, i.e., a second frequency band, can be determined as a frequency band for short-distance communication. In addition, various embodiments can be implemented.

Description

Technical Field

[0001] The present invention relates to a broadcast receiving device and an operating method thereof. Background Art

[0002] The video display device is a device having a function of displaying a video that a user can watch, and the user can watch the broadcast through the video display device. For example, the video display device may include a TV (television) having a liquid crystal display (LCD) using liquid crystal or an OLED display using an organic light emitting diode (OLED), a display screen (monitor), and a projector (projector).

[0003] In recent years, digital TV services using wired or wireless network communication networks have become increasingly popular, and digital TV services provide various services that existing analog broadcasting services cannot provide. Here, digital TV services may include VOD services provided through digital terrestrial broadcasting and digital cable broadcasting, digital satellite broadcasting, IP-TV services, terrestrial and satellite DMB services, and communication networks.

[0004] The video display device displays a broadcast screen based on a broadcast signal of a channel selected by a user among broadcast signals transmitted in various ways on a display. At this time, the video display device can directly receive the broadcast signal, or it can also receive the broadcast signal through a device such as a set-top box and transmit the signal corresponding to the broadcast channel selected by the user to the video display device. In this way, the broadcast receiving device that receives the broadcast signal can wirelessly receive the broadcast signal through an antenna as in the prior art 1 (Korean Patent Publication No. 10-2016-0021538), or it can also receive the broadcast signal through a cable.

[0005] On the other hand, the broadcast receiving device can also use wireless or wireless communication to transmit and receive data with various external devices. For example, the broadcast receiving device can receive a control signal corresponding to a user input from a remote control device via Bluetooth, which is one of the short-range communication methods, or can also transmit an audio signal to an external audio device.

[0006] At this time, when the broadcast receiving device receives broadcast signals wirelessly, the frequency band used to receive the broadcast signals and the frequency band set for short-distance communication may overlap with each other. When the two frequency bands overlap, the video output by the video display device may contain noise due to the distortion of the received broadcast signal, and the communication performance between the broadcast receiving device and the remote control device may be reduced. In addition, when the broadcast receiving device simultaneously uses a plurality of short-distance communications using different methods, for example, when Bluetooth and Wi-Fi (Wireless Fidelity) are used simultaneously, the frequency bands set for each short-distance communication may overlap with each other. In this case, the communication performance between the broadcast receiving device and the remote control device may also be reduced. Summary of the invention

[0007] Problems to be solved by the invention

[0008] The present invention is directed to solving the aforementioned problems and other problems.

[0009] Another object is to provide a broadcast receiving device and an operating method thereof that can prevent distortion of broadcast signals and degradation of communication performance between the broadcast receiving device and a remote control device even when a frequency band for receiving broadcast signals overlaps a frequency band set for short-distance communication.

[0010] Still another object is to provide a broadcast receiving device and an operating method thereof that can prevent the communication performance between the broadcast receiving device and a remote control device from being degraded even when frequency bands used for a plurality of short-distance communications overlap with each other.

[0011] Technical solutions to the problem

[0012] A broadcast receiving device according to an embodiment of the present invention for achieving the above-mentioned purpose comprises: a broadcast receiving unit for receiving broadcast signals wirelessly; an external device interface unit having at least one communication module for performing short-distance communication; and a control unit; the control unit determines whether a frequency band for receiving broadcast signals overlaps with a first frequency band preset for short-distance communication. When the frequency band for receiving broadcast signals does not overlap with the first frequency band, the first frequency band can be determined as a frequency band for short-distance communication. When at least a portion of the first frequency band overlaps with a frequency band for receiving broadcast signals, the remaining frequency band in the first frequency band except for the portion overlapping with the frequency band for receiving broadcast signals, i.e., a second frequency band, can be determined as a frequency band for short-distance communication.

[0013] On the other hand, the operation method of the broadcast receiving device of one embodiment of the present invention may include: an action of determining whether a frequency band for receiving broadcast signals and a first frequency band preset for short-range communication overlap; in a case where the frequency band for receiving broadcast signals and the first frequency band do not overlap, an action of determining the first frequency band as a frequency band for short-range communication; and in a case where at least a portion of the first frequency band overlaps with the frequency band for receiving broadcast signals, an action of determining the remaining frequency band in the first frequency band except for the portion overlapping with the frequency band for receiving broadcast signals, i.e., a second frequency band, as a frequency band for short-range communication.

[0014] Effects of the Invention

[0015] The effects of the broadcast receiving device and the operating method thereof according to the present invention will be described below.

[0016] According to various embodiments of the present invention, in the event that a frequency band for receiving broadcast signals overlaps with a frequency band set for short-range communication, the remaining frequency bands among the frequency bands set for short-range communication, except for the frequency band overlapping with the frequency band for receiving broadcast signals, are reset for short-range communication, thereby preventing distortion of broadcast signals and degradation of communication performance between a broadcast receiving device and a remote control device.

[0017] In addition, according to various embodiments of the present invention, whenever the main channel is determined or changed, it is possible to determine whether the frequency band used to receive the broadcast signal and the frequency band set for short-range communication overlap based on the data corresponding to the frequency band of the broadcast channel stored in the broadcast receiving device. Therefore, the action of sending and receiving data with an external device or the action of determining whether the communication performance has declined by processing data in order to determine whether the communication performance has declined can be omitted, thereby reducing processing operations and being able to more quickly determine whether the communication performance has declined.

[0018] In addition, according to various embodiments of the present invention, in the case where frequency bands used for each of a plurality of short-range communications overlap with each other, the remaining frequency bands set for the first short-range communication, except for the frequency band overlapping with the frequency band used for the second short-range communication, are reset to be used for the first short-range communication, thereby preventing the communication performance between the broadcast receiving device and the remote control device from being degraded.

[0019] The additional scope of the applicability of the present invention will become clear from the following detailed description. However, it is clearly understood by those skilled in the art that various changes and modifications can be made within the thought and scope of the present invention, and therefore, the detailed description and specific embodiments such as the preferred embodiments of the present invention should be understood as being exemplary only. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1a and Figure 1bis a diagram illustrating a video display system according to various embodiments of the present invention.

[0021] Figure 2 yes Figure 1a Internal block diagram of a video display device.

[0022] Figure 3 yes Figure 2 Internal block diagram of the control unit.

[0023] Figure 4 It is a flowchart of an operation method of a broadcast receiving device according to an embodiment of the present invention.

[0024] Figure 5 and Figure 6 This is a diagram for explaining the operation method of the broadcast receiving device. DETAILED DESCRIPTION

[0025] In order to clearly and briefly describe the present invention, the drawings omit the illustration of parts not related to the description, and the same reference numerals are given to the same or very similar parts throughout the specification.

[0026] The suffixes "module" and "unit" of the constituent elements used in the following description are only used to facilitate the preparation of the description, and they themselves have no particularly important meaning or function. Therefore, the "module" and the "unit" can be used interchangeably.

[0027] In the application, it should be understood that terms such as "including" or "having" are intended to indicate the existence of the features, numbers, steps, actions, constituent elements, parts or their combinations described in the specification, and cannot preclude the existence or possibility of adding one or more other features or numbers, steps, actions, constituent elements, parts or their combinations.

[0028] In addition, in the present specification, in order to explain various elements, the terms such as first and second may be used, but such elements are not limited to such terms. Such terms are only used to distinguish one element from another element.

[0029] Figure 1a and Figure 1b is a diagram illustrating a video display system according to various embodiments of the present invention.

[0030] Reference Figure 1a , the video display system 10 may include a video display device 100 and / or a remote control device 200 .

[0031] The video display device 100 may be a device that processes and outputs a video, and is not particularly limited as long as it is a device that can output a screen corresponding to a video signal on a TV, a notebook computer, a display, or the like.

[0032] The video display device 100 may receive and signal-process a broadcast signal, and may output the signal-processed broadcast video. In the case where the video display device 100 receives a broadcast signal, the video display device 100 may correspond to a broadcast receiving device.

[0033] The video display device 100 can receive broadcast signals wirelessly through an antenna or wiredly through a cable. For example, the video display device 100 can receive terrestrial broadcast signals, satellite broadcast signals, cable broadcast signals, IPTV (Internet Protocol Television) broadcast signals, etc.

[0034] The remote control device 200 is connected to the video display device 100 by wire and / or wirelessly, and can provide various control signals to the video display device 100. At this time, the remote control device 200 may include a device that establishes a wired or wireless network with the video display device 100, and transmits various control signals to the video display device 100 through the established network, or receives signals related to various actions processed in the video display device 100 from the video display device 100.

[0035] For example, various input devices such as a mouse, keyboard, space remote controller, trackball, joystick, etc. may be used as remote control device 200. Remote control device 200 may be referred to as an external device. It should be noted that external devices and remote control devices may be used in combination as needed.

[0036] The video display device 100 may be connected to only a single remote control device 200 or to two or more remote control devices 200 at the same time, and may change an object displayed on a screen or adjust a state of a screen based on a control signal provided from each remote control device 200 .

[0037] On the other hand, refer to Figure 1b , the control device 250 may receive a broadcast signal, perform signal processing on it, and transmit it to the video display device 100 , and the video display device 100 may also output a video based on the signal received from the control device 250 .

[0038] The control device 250 may be a device that controls the video display device 100. For example, the control device 250 may transmit a control signal that controls the operation of the video display device 100 to the video display device 100.

[0039] In the case where the control device 250 receives a broadcast signal, the control device 250 may correspond to a broadcast receiving device. For example, the control device 250 may be a set-top box.

[0040] The control device 250 may receive the broadcast signal wirelessly through an antenna or may receive the broadcast signal through a cable.

[0041] The remote control device 200 may be connected to the video display device 100 and / or the control device 250 by wire and / or wirelessly. For example, one remote control device 200 may be connected to the video display device 100 and the control device 250, or a plurality of remote control devices 200 may be connected to the video display device 100 and the control device 250, respectively.

[0042] Figure 2 yes Figure 1a Internal block diagram of a video display device.

[0043] Reference Figure 2 The video display device 100, as an example of a broadcast receiving device, may include a broadcast receiving unit 105, an external device interface unit 130, a network interface unit 135, a storage unit 140, a user input interface unit 150, an input unit 160, a control unit 170, a display 180, an audio output unit 185 and / or a power supply unit 190.

[0044] On the other hand, as Figure 1b The control device 250 of another example of the broadcast receiving device may include at least a part of the components included in the video display device 100. For example, the control device 150 may include the broadcast receiving unit 105, the external device interface unit 130, the network interface unit 135, the storage unit 140, the user input interface unit 150, the input unit 160, the control unit 170, the audio output unit 185 and / or the power supply unit 190.

[0045] The broadcast receiving unit 105 may include a tuner 110 and a demodulator 120 .

[0046] On the other hand, unlike the drawings, the video display device 100 may include only the broadcast receiving unit 105 and the external device interface unit 130 among the broadcast receiving unit 105, the external device interface unit 130, and the network interface unit 135. That is, the video display device 100 may not include the network interface unit 135.

[0047] The tuner 110 may select a broadcast signal corresponding to a user-selected channel or all pre-stored channels from among broadcast signals received via an antenna (not shown) or a cable (not shown), and may convert the selected broadcast signal into an intermediate frequency signal or a baseband video or voice signal.

[0048] For example, if the selected broadcast signal is a digital broadcast signal, the tuner 110 may convert it into a digital IF signal (DIF), and if it is an analog broadcast signal, it may convert it into an analog baseband video or voice signal (CVBS / SIF). That is, the tuner 110 may process a digital broadcast signal or an analog broadcast signal. The analog baseband video or voice signal (CVBS / SIF) output from the tuner 110 may be directly input to the control unit 170.

[0049] On the other hand, the tuner 110 may sequentially select broadcast signals of all broadcast channels stored by the channel memory function among the received broadcast signals and convert them into intermediate frequency signals or baseband video or voice signals.

[0050] On the other hand, in order to receive broadcast signals of a plurality of channels, the tuner unit 110 may include a plurality of tuners, or may be a single tuner that simultaneously receives broadcast signals of a plurality of channels.

[0051] The demodulation unit 120 may perform a demodulation operation by receiving the digital IF signal (DIF) converted in the tuner unit 110 .

[0052] The demodulation unit 120 may output a streaming signal (TS) after performing demodulation and channel decoding. At this time, the streaming signal may be a signal multiplexed with a video signal, a voice signal, or a data signal.

[0053] The streaming media signal output from the demodulation unit 120 may be input to the control unit 170. The control unit 170 may transmit the streaming media signal to the display device 200 through the external device interface unit 130 after performing inverse multiplexing, video / voice signal processing, etc.

[0054] The external device interface unit 130 can transmit and receive data with a connected external device. To this end, the external device interface unit 130 may include an A / V input and output unit (not shown).

[0055] The A / V input and output section can send and receive signals with an external device. For example, the A / V input and output section may include an Ethernet terminal, a USB terminal, a CVBS (Composite Video Banking Sync) terminal, a component terminal, an S-video terminal (analog), a DVI (Digital Visual Interface) terminal, an HDMI (High Definition Multimedia Interface) terminal, an MHL (Mobile High-definition Link: a mobile terminal high-definition audio and video standard interface) terminal, an RGB terminal, a D-SUB terminal, an IEEE1394 terminal, an SPDIF terminal, a liquid crystal (Liquid) HD terminal, etc. The digital signal input through such a terminal can be transmitted to the control unit 170. At this time, the analog signal input through the CVBS terminal and the S-video terminal can be converted into a digital signal by an analog-to-digital conversion unit (not shown) and transmitted to the control unit 170.

[0056] The external device interface unit 130 may be connected to a display device 200 such as a TV or a display screen, either wirelessly or wirelessly, and may perform input / output operations with the display device 200 .

[0057] The external device interface unit 130 may include a wireless communication module (not shown) for short-range communication with an external device. Through such a wireless communication module, the external device interface unit 130 may exchange data with a neighboring mobile terminal. For example, the external device interface unit 130 may receive device information, executed application information, application images, etc. from the mobile terminal in the mirroring mode.

[0058] The external device interface unit 130 can perform short-distance communication using Bluetooth, RFID (Radio Frequency Identification), infrared communication (IrDA, infrared Data Association), UWB (Ultra-Wideband), ZigBee, or the like.

[0059] The network interface unit 135 may provide an interface for connecting to a wired / wireless network including the Internet. For example, the network interface unit 155 may receive content or data provided by the Internet or a content provider or a network operator through a network.

[0060] The network interface unit 135 may include a communication module (not shown) for connecting to a wireless network. For example, the network interface unit 135 may include a communication module for WLAN (Wireless LAN) (Wi-Fi), Wibro (Wirelessbroadband), Wimax (World Interoperability for Microwave Access), HSDPA (High Speed ​​Downlink Packet Access), etc.

[0061] The network interface unit 135 can transmit and receive data with other users or other electronic devices through the connected network or other networks linked to the connected network.

[0062] The storage unit 140 may store programs for various signal processing and control in the control unit 170, and may also store video, voice or data signals of signal processing. For example, the storage unit 140 may store application programs designed for the purpose of performing various tasks that can be processed by the control unit 170, and may selectively provide a part of the stored application programs when requested by the control unit 170.

[0063] The program and the like stored in the storage unit 140 are not particularly limited as long as they can be executed by the control unit 170 .

[0064] The storage part 140 may also perform a function for temporarily storing a video, voice or data signal received from an external device through the external device interface part 130 .

[0065] The storage unit 140 may store data of at least one broadcast operator. Here, the broadcast operator may include a terrestrial broadcasting station that transmits broadcast signals, a satellite broadcast operator, a cable broadcast operator, etc. For example, the data of a satellite broadcast operator may include the name of the satellite, the frequency (C-band, Ku-band) used for the satellite to transmit the broadcast signal, the intermediate frequency, polarization, the symbol rate, etc. For example, the data of a cable broadcast operator may include the frequency used for each operator to transmit the broadcast signal and FEC (forward error correction) associated data, etc.

[0066] The storage unit 140 may store data related to a specified broadcast channel through a channel memory function such as a channel map. For example, the storage unit 140 may store data corresponding to a frequency band of at least one broadcast channel. In this case, the storage unit 140 may also store data corresponding to a multiple of a frequency band of at least one broadcast channel of a broadcast signal in consideration of harmonic components.

[0067] Figure 2 Although the embodiment in which the storage unit 140 and the control unit 170 are provided separately is shown, the scope of the present invention is not limited thereto, and the storage unit 140 may be included in the control unit 170 .

[0068] The storage unit 140 may include at least one of a volatile memory (e.g., DRAM, SRAM, SDRAM, etc.) and a non-volatile memory (e.g., flash memory, hard disk drive (HDD), solid-state drive (SSD), etc.). In various embodiments of the present invention, the storage unit 140 and the memory may also be used in combination with each other.

[0069] The user input interface unit 150 can transmit a signal input by the user to the control unit 170 or transmit a signal from the control unit 170 to the user. For example, the user input signal such as power on / off, channel selection, screen setting, etc. is sent / received from the remote control device 300, or a user input signal input from a local key (not shown) such as a power key, a channel key, a volume key, and a setting value is transmitted to the control unit 170, or a user input signal input from a sensor unit (not shown) that senses a user's gesture is transmitted to the control unit 170, or a signal from the control unit 170 is sent to the sensor unit.

[0070] The input unit 160 may be provided at one side of the body of the control device 100. For example, the input unit 160 may include a touch pad, a physical button, and the like.

[0071] The input unit 160 may receive various user commands related to the operation of the control device 100, and may transmit control signals corresponding to the input commands to the control unit 170. The input unit 160 may transmit control signals corresponding to the input commands to the control unit 170 through the user input interface unit 150.

[0072] The input unit 160 may include at least one microphone (not shown), and may receive a user's voice through the microphone.

[0073] The control unit 170 may include at least one processor, and the processor included therein may be used to control the overall operation of the control device 100. Here, the processor may be a general processor such as a CPU (central processing unit). Of course, the processor may be a dedicated device such as an ASIC or a processor based on other hardware.

[0074] The control unit 170 may inversely multiplex the streaming media input through the tuner 110 , the demodulator 120 , the external device interface unit 130 , or the network interface unit 135 , or generate and output a signal for video or voice output by processing the inversely multiplexed signal.

[0075] The video signal and / or the voice signal processed in the control part 170 may be transferred to the display apparatus 200 through the external device interface part 130 .

[0076] The voice signal processed in the control part 170 may be transferred to the audio output part 185 .

[0077] The audio output unit 185 may include at least one speaker (not shown). The audio output unit 185 may receive the voice signal processed in the control unit 170 and output it as voice.

[0078] Although Figure 2 Although not shown in the figure, the control unit 170 may include a reverse multiplexing unit, a video processing unit, etc. Figure 3 Provide explanation.

[0079] In addition, the control unit 170 may control the overall operation of the control device 100. For example, the control unit 170 may control the tuner 110 to select (Tuning) a broadcast corresponding to a channel selected by a user or a pre-stored channel.

[0080] On the other hand, the control device 100 may further include a camera unit (not shown). The camera unit may capture a user. The camera unit may be implemented by one camera, but is not limited thereto, and may also be implemented by a plurality of cameras. On the other hand, the camera unit may be embedded in the upper portion of the control device 100 or configured separately. Video information captured by the camera unit may be input to the control unit 170.

[0081] The control unit 170 can recognize the position of the user based on the video captured by the camera unit. For example, the control unit 170 can grasp the distance (z-axis coordinate) between the user and the control device 100.

[0082] The control section 170 may sense the user's gesture based on each of the video captured by the camera section or the signal sensed by the sensor section or a combination thereof.

[0083] The power supply unit 190 can supply corresponding power to the entire control device 100. In particular, the power supply unit 190 can supply power to the control unit 170 implemented in the form of a system on chip (SOC), the audio output unit 185 for audio output, and the like.

[0084] Specifically, the power supply unit 190 may include an inverter (not shown) that converts AC power into DC power and a DC / Dc converter (not shown) that converts the level of the DC power.

[0085] The remote control device 300 can transmit the user input to the user input interface unit 150. To this end, the remote control device 300 can use Bluetooth, RF (Radio Frequency) communication, infrared (Infrared Radiation) communication, UWB (Ultra-wideband), ZigBee, etc. In addition, the remote control device 300 receives the video, voice or data signal output from the user input interface unit 150, and displays it on the remote control device 300 or outputs it by voice.

[0086] on the other hand, Figure 2 The block diagram of the control device 100 shown is a block diagram for an embodiment of the present invention, and the various components of the block diagram can be combined, added or omitted according to the specifications of the control device 100 actually implemented.

[0087] That is, as required, two or more components can be combined into one component, or one component can be divided into two or more components. In addition, the functions performed in each frame are used to illustrate the embodiments of the present invention, and the specific actions or devices thereof do not limit the scope of the present invention.

[0088] Figure 3 yes Figure 2 Internal block diagram of the control unit.

[0089] Reference Figure 3 The control unit 170 of an embodiment of the present invention may include a demultiplexing unit 310, a video processing unit 320, a processor 330, an OSD generating unit 340, a mixer 345, a frame rate conversion unit 350 and / or a formatter 360. In addition, an audio processing unit (not shown) and a data processing unit (not shown) may also be included.

[0090] The inverse multiplexing unit 310 can perform inverse multiplexing on the input streaming media. For example, when an MPEG-2TS is input, it is inversely multiplexed and separated into video, voice and data signals. Here, the streaming media signal input to the inverse multiplexing unit 310 can be a streaming media signal output from the tuner 110 or the demodulator 120 or the external device interface unit 130.

[0091] The video processing section 320 may perform video processing of the inversely multiplexed video signal. To this end, the video processing section 320 may have a video decoder 325 and a scaler 335.

[0092] The video decoder 325 may decode the inverse-multiplexed video signal, and the scaler 335 may perform scaling to enable output of a resolution of the decoded video signal on the display 180 .

[0093] The video decoder 325 may include decoders of various specifications, such as MPEG-2, H.264 decoders, 3D video decoders for color image and depth image, and decoders for multiple viewpoint videos.

[0094] The processor 330 may control the overall operation of the video processing apparatus 100 or the control unit 170. For example, the processor 330 may control the tuning unit 110 to select a broadcast corresponding to a channel selected by a user or a pre-stored channel.

[0095] In addition, the processor 330 may control the video processing apparatus 100 according to a user command input through the user input interface part 150 or an internal program.

[0096] In addition, the processor 330 may perform data transmission control with the network interface part 135 or the external device interface part 130 .

[0097] In addition, the processor 330 can control the operations of the demultiplexing unit 310 , the video processing unit 320 , the OSD generating unit 340 , and the like in the control unit 170 .

[0098] The OSD generator 340 may generate an OSD signal based on a user input or spontaneously. For example, based on a user input signal input through the input unit 160 , a signal for displaying various information in graphics or text on the screen of the display 180 may be generated.

[0099] The generated OSD signal may include various data such as a user interface screen, various menu screens, widgets, icons, etc. of the video processing apparatus 100. In addition, the generated OSD signal may include a 2D object or a 3D object.

[0100] In addition, the OSD generation unit 340 may generate a cursor that can be displayed on the display 180 based on a cursor signal input from the remote control device 200 .

[0101] The OSD generating unit 340 may include a cursor signal processing unit (not shown) for generating a cursor. The cursor signal processing unit (not shown) may also be provided separately, instead of being provided in the OSD generating unit 240 .

[0102] The mixer 345 may mix the OSD signal generated in the OSD generating part 340 and the decoded video signal video-processed in the video processing part 320. The mixed video signal may be provided to the frame rate converting part 350.

[0103] The frame rate converter (FRC) 350 may convert the frame rate of the input video. On the other hand, the frame rate converter 350 may also directly output without separate frame rate conversion.

[0104] The formatter 360 may arrange the left-eye video frame and the right-eye video frame of the frame rate converted 3D video, and may output a synchronization signal (Vsync) for the left-eye glass and the right-eye glass of an open 3D viewing device (not shown).

[0105] On the other hand, the formatter 360 may convert the format of the input video signal into a video signal for display on the display 180 and output it.

[0106] In addition, the formatter 360 can change the format of the 3D video signal, for example, to one of various 3D formats such as Side by Side, Top / Down, Frame Sequential, Interlaced, Checker Box, etc.

[0107] On the other hand, the formatter 360 may convert the 2D video signal into a 3D video signal. For example, according to a 3D video generation algorithm, an edge or a selectable object is detected in the 2D video signal, and an object based on the detected edge or selectable object is separated into a 3D video signal and generated. At this time, as described above, the generated 3D video signal may be separated into a left-eye video signal L and a right-eye video signal R and aligned.

[0108] On the other hand, although not shown in the figure, a 3D processor (not shown) for 3D effect signal processing may be configured in addition to the formatter 360. In order to improve the 3D effect, such a 3D processor may process the brightness, tint, and color adjustment of the video signal. For example, signal processing such as making a short distance clear and a long distance blurry may be performed. On the other hand, the function of such a 3D processor may be incorporated into the formatter 360 or into the video processing unit 320.

[0109] On the other hand, the audio processing unit (not shown) in the control unit 170 can perform audio processing of the inverse multiplexed audio signal. To this end, the audio processing unit (not shown) can have various decoders.

[0110] In addition, the audio processing unit (not shown) in the control unit 170 can process baseband (Base), treble (Treble), volume adjustment, etc.

[0111] The data processing unit (not shown) in the control unit 170 can perform data processing of the inverse multiplexed data signal. For example, if the inverse multiplexed data signal is an encoded data signal, it can be decoded. The encoded data signal can be an Electronic Program Guide (EPG) information including broadcast information such as the start time and end time of the broadcast program shown on each channel.

[0112] on the other hand, Figure 3 The block diagram of the control unit 170 shown is only a block diagram of an embodiment of the present invention, and the various components of the block diagram can be combined, added or omitted according to the specifications of the control unit 170 actually implemented.

[0113] In particular, the frame rate conversion unit 350 and the formatter 360 may be independently provided instead of being provided in the control unit 170 or may be provided separately as one module.

[0114] Figure 4 is a flowchart of an operation method of a broadcast receiving device according to an embodiment of the present invention. Figure 5 and Figure 6 The following is a diagram for explaining the operation method of the broadcast receiving device. In the following description of the present invention, the video display device 100 is used as an example of a broadcast receiving device, but the present invention is not limited thereto, and it can be understood that the control device 250 operates in the same / similar manner as the video display device 100.

[0115] Reference Figure 4The video display device 100 may turn on the power in the S401 operation. For example, the video display device 100 may turn on the power when receiving a signal to turn on the power from the remote control device 200 or receiving a signal of pressing a power key provided in the input unit 160 when the power is off.

[0116] When the video display device 100 is powered on in operation S402, the frequency band for receiving the broadcast signal of the pre-stored channel may be confirmed. Here, the pre-stored channel may refer to a channel selected as a main channel before the video display device 100 is powered off.

[0117] For example, when the video display device 100 stores data about the main channel at the time point when the power is turned off in the storage unit 140 and turns on the power, the channel selected as the main channel at the time point when the power is turned off can be determined as the main channel based on the data stored in the storage unit 140. At this time, the video display device 100 can confirm the frequency band corresponding to the channel determined as the main channel based on the data corresponding to the frequency bands of at least one broadcast channel stored in the storage unit 140.

[0118] On the other hand, the video display device 100 can confirm the frequency band used to receive the broadcast signal when wirelessly receiving the broadcast signal through the antenna, and can omit the execution of actions related to confirming the frequency band used to receive the broadcast signal when wired receiving the broadcast signal through the cable.

[0119] The video display device 100 can determine whether the frequency band corresponding to the main channel and the frequency band preset for short-distance communication (hereinafter, the first frequency band) overlap in the S403 action. Here, the first frequency band can be set corresponding to each of the short-distance communication methods. For example, the first frequency band of the Bluetooth method can be preset to 2400 to 2480 MHz. For example, the first frequency band of the Zifeng method can be set to 902 to 928 MHz, 2400 to 2483.5 MHz, etc. according to the region.

[0120] At this time, the video display device 100 may also determine whether at least a portion of the first frequency band overlaps with a multiple of the frequency corresponding to the main channel. For example, when the frequency band corresponding to the main channel is 801.25 MHz, which is a frequency band of terrestrial broadcasting in North America, the video display device 100 may determine whether one of the 801.25 MHz frequency band, the 1602.50 Hz frequency band of the 2 times, and the 2403.75 MHz frequency band of the 3 times overlaps with at least a portion of the first frequency band.

[0121] In action S404, when at least a portion of the first frequency band overlaps with the frequency band corresponding to the main channel, the video display device 100 can determine the remaining frequency band (hereinafter referred to as the second frequency band) in the first frequency band except for the portion overlapping with the frequency band corresponding to the main channel as a frequency band for short-range communication.

[0122] In addition, when at least a portion of the first frequency band overlaps with a multiple of the frequency corresponding to the main channel, the video display device 100 can determine the remaining frequency band in the first frequency band except for the portion overlapping with the multiple of the frequency corresponding to the main channel as a frequency band for short-range communication.

[0123] On the other hand, in the operation S405, when the first frequency band and the frequency band corresponding to the main channel do not overlap, the video display device 100 may determine the entire first frequency band as a frequency band for short-distance communication. Figure 5 and Figure 6 Provide explanation.

[0124] Reference Figure 5 and Figure 6 In the case where the short-distance communication method used by the video display device 100 is the Bluetooth method, the first frequency band can be set to 2400 to 2480 MHz, and a plurality of channels with a bandwidth (BW) of 1 MHz or 2 MHz can be used for short-distance communication.

[0125] At this time, it can be confirmed that, when the frequency band 520 corresponding to the main channel is 2454 to 2489 MHz, in the video display device 100, the frequency band 510 of 2400 to 2454 MHz in the first frequency band does not overlap with the frequency band 520 corresponding to the main channel, but the frequency band 530 of 2454 to 2480 MHz overlaps with the frequency band 520 corresponding to the main channel.

[0126] Since a frequency band 530 of 2454 to 2480 MHz in the first frequency band overlaps a frequency band 520 corresponding to a main channel, the video display device 100 may determine the remaining frequency band except the frequency band 530, that is, a frequency band 510 of 2400 to 2454 MHz, as a second frequency band for short distance communication.

[0127] On the other hand, the video display device 100 can determine whether the frequency bands used for each of the multiple short-distance communications overlap with each other when using multiple short-distance communications. In addition, the video display device 100 can reset the remaining frequency bands set for the first short-distance communication except the frequency bands overlapping with the frequency bands used for the second short-distance communication in the case where the frequency bands used for each of the multiple short-distance communications overlap with each other for the first short-distance communication. For example, in a state where the first frequency band of the Bluetooth mode is preset as the frequency band 510 of 2400 to 2454 MHz, the video display device 100 can use the frequency band of 2401 to 2423 MHz in the short-distance communication of the Wi-Fi mode. At this time, the video display device 100 can determine the second frequency band for the short-distance communication of the Bluetooth mode as 2423 to 2454 MHz in the first frequency band except the frequency band 520 corresponding to the main channel and the frequency band for the short-distance communication of the Wi-Fi mode.

[0128] On the other hand, in the process of performing short-distance communication with an external device, in order to prevent propagation obstruction or noise interference, the video display device 100 may use a frequency hopping method of quickly changing a channel used for communication according to a specific pattern.

[0129] At this time, when forming a channel change pattern for frequency hopping (hereinafter referred to as a frequency hopping sequence), the video display device 100 can form the frequency hopping sequence with the entire first frequency band channels when the first frequency band and the frequency band corresponding to the main channel do not overlap, and can form the frequency hopping sequence only with the channels of the second frequency band excluding the overlapping portion when at least a portion of the first frequency band overlaps with the frequency band corresponding to the main channel.

[0130] On the other hand, when the video display device 100 is in communication connection with the external device, in the case of a change in the main channel, it can be determined whether to reconstruct the frequency hopping sequence based on the determination result of whether the frequency band corresponding to the changed main channel overlaps with the first frequency band. For example, when the video display device 100 changes the main channel during short-range communication using a frequency hopping sequence composed of channels in the entire first frequency band, in the case where the frequency band corresponding to the changed main channel overlaps with at least a portion of the first frequency band, the video display device 100 can determine to reconstruct the frequency hopping sequence.

[0131] At this time, the video display device 100 generates data about the reconstructed frequency hopping sequence (hereinafter, data about frequency hopping) when reconstructing the frequency hopping sequence, and can transmit it to an external device connected for communication, and can use the reconstructed frequency hopping sequence to perform short-distance communication with the external device.

[0132] On the other hand, when the video display device 100 is not communicatively connected to the external device, if the frequency hopping sequence is reconstructed due to the overlap of the frequency band corresponding to the main channel and the first frequency band, the video display device 100 can attempt to communicate with the external device using the reconstructed frequency hopping sequence.

[0133] Alternatively, when the frequency band corresponding to the main channel overlaps with the first frequency band, the video display device 100 may also send an arbitrary signal through the frequency band (hereinafter, the third frequency band) that overlaps with the frequency band corresponding to the main channel and the first frequency band. At this time, the video display device 100 and / or the external device may confirm the decrease in the efficiency of the communication success rate and communication performance in the third frequency band by the arbitrary signal occupying the third frequency band, and may also use the remaining frequency band except the third frequency band, that is, the second frequency band, to determine the execution of short-distance communication.

[0134] Refer to Figure 4 In operation S406 , the video display device 100 may receive a broadcast signal of a main channel through the broadcast receiving unit 105 , process the received broadcast signal, and output a video through the display 180 .

[0135] The video display device 100 may confirm whether the main channel has been changed in operation S407. For example, the video display device 100 may confirm whether a user input signal corresponding to changing the main channel has been received through the user input interface unit 150 and / or the input unit 160.

[0136] In operation S408 , when the main channel is changed, the video display device 100 may check the frequency band corresponding to the channel changed to the main channel based on the data corresponding to the frequency band of each of at least one broadcast channel stored in the storage unit 140 .

[0137] In addition, the process returns to operation S403 and the video display device 100 may re-determine whether the frequency band corresponding to the channel changed to the main channel overlaps with the first frequency band.

[0138] On the other hand, the video display device 100 can determine whether the power is turned off in the S409 action. For example, the power can be turned off when a signal to turn off the power is received from the remote control device 200 or a signal of pressing a power key provided in the input unit 160 when the power is on is received.

[0139] When the power is not turned off, the video display device 100 may continue to receive the broadcast signal of the main channel until the power is turned off, process the received broadcast signal, and output a video through the display 180 .

[0140] On the other hand, when the video display device 100 is powered off during operation S410, the data related to the channel selected as the current main channel may be stored in the storage unit 140. Alternatively, the video display device 100 may update the data related to the channel selected as the main channel stored in the storage unit 140 every time the main channel is determined or changed.

[0141] As described above, according to various embodiments of the present invention, in the event that a frequency band for receiving broadcast signals overlaps with a frequency band set for short-range communication, the remaining frequency bands in the frequency band set for short-range communication, except for the frequency band overlapping with the frequency band for receiving broadcast signals, are reset to be used for short-range communication, thereby preventing distortion of broadcast signals and degradation of communication performance between a broadcast receiving device and a remote control device.

[0142] In addition, according to various embodiments of the present invention, whenever the main channel is determined or changed, it is possible to determine whether the frequency band used to receive the broadcast signal and the frequency band set for short-range communication overlap based on the data corresponding to the frequency band of the broadcast channel stored in the broadcast receiving device. Therefore, the action of sending and receiving data with an external device or the action of determining whether the communication performance has declined by processing data in order to determine whether the communication performance has declined can be omitted, thereby reducing processing operations and being able to more quickly determine whether the communication performance has declined.

[0143] The drawings are only for facilitating the understanding of the embodiments disclosed in this specification. The technical ideas disclosed in this specification are not limited by the drawings and should be understood to include all changes, equivalents and substitutes within the ideas and technical scope of this specification.

[0144] On the other hand, the operation method of the broadcast receiving device of the present invention can be implemented by a code that can be read by the processor in a recording medium that can be read by the processor provided in the broadcast receiving device. The recording medium that can be read by the processor includes all kinds of recording devices that store data that can be read by the processor. Examples of the recording medium that can be read by the processor include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, etc., and also include devices implemented in the form of a carrier wave transmitted such as through the Internet. In addition, the recording medium that can be read by the processor is distributed in a computer system connected by a network, and the code that can be read by the processor can be stored and executed in a distributed manner.

[0145] In addition, the preferred embodiments of the present invention are described above, but the present invention is not limited to the above specific embodiments. It is obvious that a person skilled in the art can make various modifications without departing from the main purpose of the present invention as claimed in the claims. Such modified implementation should not be understood separately from the technical idea or prospect of the present invention.

Claims

1. A broadcast receiving device, characterized in that: include: A broadcast receiving unit, which receives broadcast signals wirelessly; The external device interface unit has at least one communication module and performs short-range communication; as well as Control Department; The control unit determines whether a frequency band for receiving a broadcast signal corresponding to one of the broadcast channels set as a main channel overlaps with a first frequency band preset for the short-distance communication, In a case where a frequency band for receiving the broadcast signal does not overlap with the first frequency band, determining the first frequency band as a frequency band for the short-range communication, In a case where at least a portion of the first frequency band overlaps with a frequency band for receiving the broadcast signal, determining the remaining frequency band of the first frequency band except for the portion overlapping with the frequency band for receiving the broadcast signal, that is, a second frequency band, as a frequency band for the short-range communication, When the main channel is changed in a state of being communicatively connected to an external device as a short-distance communication target, the control unit generates data on frequency hopping based on a determination result of whether a frequency band corresponding to the changed main channel overlaps with the first frequency band. The generated data related to the frequency hopping is transmitted to the external device through the external device interface unit.

2. The broadcast receiving device according to claim 1, characterized in that further comprising a storage unit storing data corresponding to a frequency band of at least one broadcast channel, The control unit determines one of the at least one broadcast channel as the main channel according to a preset reference or a user input, Whether or not the frequency band corresponding to the main channel overlaps with the first frequency band is determined based on the data of the frequency band stored in the storage unit.

3. The broadcast receiving device according to claim 2, characterized in that: When the power of the broadcast receiving apparatus is turned on, the control unit determines a first broadcast channel selected before the power of the broadcast receiving apparatus is turned off as the main channel.

4. The broadcast receiving device according to claim 3, characterized in that: When the main channel is changed to the second broadcast channel according to a user input, the control unit re-determines whether a frequency band corresponding to the changed main channel overlaps with the first frequency band based on the frequency band data stored in the storage unit.

5. An operating method of a broadcast receiving device, characterized in that: include: An action of determining whether a frequency band for receiving a broadcast signal corresponding to one of the broadcast channels set as a main channel overlaps with a first frequency band preset for short-range communication; an action of determining the first frequency band as a frequency band for the short-range communication when a frequency band for receiving the broadcast signal and the first frequency band do not overlap; an action of determining, in a case where at least a portion of the first frequency band overlaps with a frequency band for receiving the broadcast signal, a second frequency band, which is a remaining frequency band in the first frequency band except for a portion overlapping with the frequency band for receiving the broadcast signal, as a frequency band for the short-range communication; When the main channel is changed while the communication connection is established with an external device as a short-distance communication target, generating data on frequency hopping based on a result of determining whether a frequency band corresponding to the changed main channel overlaps with the first frequency band; as well as The action of transmitting the generated data related to the frequency hopping to the external device.

6. The operating method of the broadcast receiving device according to claim 5, characterized in that: The method further includes determining, according to a preset reference or user input, one of the at least one broadcast channel as the main channel. The operation of determining whether there is overlap includes determining whether a frequency band corresponding to the main channel overlaps with the first frequency band based on data of a frequency band corresponding to at least one of the broadcast channels stored in a storage unit of the broadcast receiving device.

7. The operating method of the broadcast receiving device according to claim 6, characterized in that: The action of determining as the main channel includes, when the power of the broadcast receiving apparatus is turned on, an action of determining, as the main channel, a first broadcast channel selected before the power of the broadcast receiving apparatus is turned off.

8. The operating method of the broadcast receiving device according to claim 7, characterized in that: The action of determining the main channel further includes an action of determining the second broadcast channel as the main channel when receiving a user input to change the main channel to the second broadcast channel. The action of determining whether there is overlap further includes, when the main channel is changed, an action of re-determining whether a frequency band corresponding to the changed main channel overlaps with the first frequency band.

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