Signal processing device and image display device including same

Abstract

The present disclosure relates to a signal processing device and an image display device including same. The signal processing device according to an embodiment of the present disclosure includes: a plurality of digital amplifiers, each corresponding to a plurality of speakers; a control unit for outputting an audio signal to each of the plurality of digital amplifiers; a first switching circuit operating such that one of a first audio signal, outputted to a first digital amplifier, and a second audio signal, outputted to a second digital amplifier, is transmitted to the second digital amplifier; and a second switching circuit operating such that a first speaker, corresponding to the first digital amplifier, is electrically connected to any one of the first digital amplifier and the second digital amplifier, wherein the control unit can control the first switching circuit and the second switching circuit on the basis of the state of the first digital amplifier. Various other embodiments are possible.

Description

Signal processing device and image display device including the same

[0001] The present disclosure relates to a signal processing device and an image display device including the same.

[0002] A signal processing device may refer to a device that processes various input signals. A signal processing device may be implemented as an audio output device that processes audio signals and outputs audio through a speaker, or as an image display device that processes image and audio signals separately and then outputs both images and audio through a display and speaker.

[0003] Recently, the global transition from analog to digital broadcasting has been underway, and user demand for devices that can enjoy the high-definition picture quality of digital broadcasting along with rich, three-dimensional sound is increasing. In particular, audio systems that enhance sound quality by outputting audio across various frequency ranges through multiple speakers are becoming widely used. For example, an audio system may consist of a woofer, which outputs low-frequency audio, a midrange, which outputs mid-frequency audio, and a tweeter, which outputs high-frequency audio.

[0004] Meanwhile, in a device that outputs audio of various frequency ranges through multiple speakers, a digital amplifier that processes signals transmitted to the speakers may be provided, corresponding to each of the multiple speakers. Each of the multiple digital amplifiers can process the audio signal and transmit it to the corresponding speaker. In this case, if a specific digital amplifier is defective, audio is not output from the speaker receiving the signal from that specific digital amplifier, or abnormal audio is output. However, in the past, there was no way to provide normal audio to the user until the defective specific digital amplifier was repaired or replaced, which caused inconvenience to the user.

[0005] The present disclosure aims to solve the above-mentioned and other problems.

[0006] Another purpose is to provide a signal processing device and a video display device including the same that can provide audio to a user even when a digital amplifier is defective.

[0007] Another purpose is to provide a signal processing device and a video display device including the same that can appropriately provide information to a user about services related to repair or replacement of a digital amplifier.

[0008] In order to achieve the above object, a signal processing device according to one embodiment of the present disclosure includes: a plurality of digital amplifiers each corresponding to a plurality of speakers; a control unit outputting a voice signal to each of the plurality of digital amplifiers; a first switching circuit operable to transmit one of a first voice signal output to a first digital amplifier and a second voice signal output to a second digital amplifier to the second digital amplifier; and a second switching circuit operable to electrically connect a first speaker corresponding to the first digital amplifier to one of the first digital amplifier and the second digital amplifier, wherein the control unit can control the first switching circuit and the second switching circuit based on a state of the first digital amplifier.

[0009] In order to achieve the above object, an image display device according to one embodiment of the present disclosure includes: a display; a plurality of speakers; a plurality of digital amplifiers respectively corresponding to the plurality of speakers; a control unit which outputs audio signals to each of the plurality of digital amplifiers; a first switching circuit which operates so that either a first audio signal output to a first digital amplifier or a second audio signal output to a second digital amplifier is transmitted to the second digital amplifier; and a second switching circuit which operates so that either the first digital amplifier or the second digital amplifier is electrically connected to the first speaker corresponding to the first digital amplifier, wherein the control unit can control the first switching circuit and the second switching circuit based on a state of the first digital amplifier.

[0010] The effects of the signal processing device according to the present disclosure and the image display device including the same are described as follows.

[0011] According to at least one embodiment of the present disclosure, audio can be provided to a user even if a digital amplifier is defective.

[0012] According to at least one embodiment of the present disclosure, information regarding services related to repair or replacement of a digital amplifier can be appropriately provided to a user.

[0013] Further scope of the applicability of the present disclosure will become apparent from the detailed description below. However, since various modifications and variations within the spirit and scope of the present disclosure will become apparent to those skilled in the art, it should be understood that the detailed description and specific examples, such as preferred embodiments of the present disclosure, are given by way of example only.

[0014] FIG. 1 is a diagram illustrating an image display system according to one embodiment of the present disclosure.

[0015] Figure 2 is an internal block diagram of the image display device of Figure 1.

[0016] Figure 3 is an internal block diagram of the control unit of Figure 2.

[0017] Figure 4 is a drawing illustrating a control method of the remote control device of Figure 2.

[0018] FIG. 5 is a block diagram of a signal processing device according to one embodiment of the present disclosure.

[0019] FIGS. 6A to 6C are drawings for reference in the description of a plurality of speakers according to one embodiment of the present disclosure.

[0020] FIGS. 7 to 10 are drawings for reference in explaining the operation of a signal processing device according to one embodiment of the present disclosure.

[0021] FIG. 11 is a block diagram of a signal processing device according to another embodiment of the present disclosure.

[0022] FIG. 12 is a flowchart of an operation method of an image display device according to one embodiment of the present disclosure.

[0023] Hereinafter, the present disclosure will be described in detail with reference to the drawings. In the drawings, portions irrelevant to the description are omitted to clearly and concisely describe the present disclosure, and the same reference numerals are used for identical or extremely similar portions throughout the specification.

[0024] The suffixes "module" and "part" used in the following description are given solely for the convenience of writing this specification and do not impart any particularly significant meaning or role to the components themselves. Therefore, the terms "module" and "part" may be used interchangeably.

[0025] In this application, it should be understood that terms such as “include” or “have” are intended to specify the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0026] Additionally, while terms such as "first" and "second" may be used in this specification to describe various elements, these elements are not limited by these terms. These terms are used only to distinguish one element from another.

[0027] FIG. 1 is a diagram illustrating an image display system according to various embodiments of the present disclosure.

[0028] Referring to FIG. 1, the image display system (10) may include an image display device (100) and / or a remote control device (200).

[0029] The image display device (100) may be a device that processes and outputs an image. The image display device (100) is not particularly limited as long as it can output a screen corresponding to an image signal, such as a TV, a notebook computer, or a monitor.

[0030] The video display device (100) can receive a broadcast signal, process the signal, and output the processed broadcast image. When the video display device (100) receives a broadcast signal, the video display device (100) may correspond to a broadcast receiving device.

[0031] The video display device (100) can receive broadcast signals wirelessly via an antenna, or can receive broadcast signals wired via 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.

[0032] The remote control device (200) can be connected to the image display device (100) by wire and / or wirelessly, and can provide various control signals to the image display device (100). At this time, the remote control device (200) can include a device that establishes a wired or wireless network with the image display device (100), and transmits various control signals to the image display device (100) through the established network, or receives signals related to various operations processed in the image display device (100) from the image display device (100).

[0033] For example, various input devices such as a mouse, keyboard, space remote control, trackball, joystick, etc. can be used as the remote control device (200). The remote control device (200) can be referred to as an external device, and it is to be noted in advance that external devices and remote control devices can be used interchangeably as needed.

[0034] The video display device (100) can be connected to only a single remote control device (200) or can be connected to two or more remote control devices (200) simultaneously, and can change objects displayed on the screen or adjust the status of the screen based on control signals provided from each remote control device (200).

[0035] Figure 2 is an internal block diagram of the image display device of Figure 1.

[0036] Referring to FIG. 2, the video display device (100) 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).

[0037] The broadcast receiving unit (105) may include a tuner unit (110) and a demodulator unit (120).

[0038] Meanwhile, unlike the drawing, the image display device (100) may include only the broadcast reception unit (105) and the external device interface unit (130) among the broadcast reception unit (105), the external device interface unit (130), and the network interface unit (135). That is, the image display device (100) may not include the network interface unit (135).

[0039] The tuner unit (110) can select a broadcast signal corresponding to a channel selected by the user or all previously stored channels among broadcast signals received via an antenna (not shown) or a cable (not shown). The tuner unit (110) can convert the selected broadcast signal into an intermediate frequency signal or a baseband video or audio signal.

[0040] For example, the tuner unit (110) can convert the selected broadcast signal into a digital IF signal (DIF) if it is a digital broadcast signal, and can convert it into an analog baseband video or audio signal (CVBS / SIF) if it is an analog broadcast signal. That is, the tuner unit (110) 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 (110) can be directly input to the control unit (170).

[0041] Meanwhile, the tuner unit (110) can sequentially select broadcast signals of all broadcast channels stored through the channel memory function among the received broadcast signals and convert them into intermediate frequency signals or baseband video or audio signals.

[0042] Meanwhile, the tuner unit (110) may be equipped with multiple tuners to receive broadcast signals of multiple channels. Alternatively, a single tuner that simultaneously receives broadcast signals of multiple channels is also possible.

[0043] The demodulation unit (120) can perform a demodulation operation by receiving a digital IF signal (DIF) converted by the tuner unit (110).

[0044] The demodulation unit (120) can output a stream signal (TS) after performing demodulation and channel decoding. At this time, the stream signal may be a signal in which a video signal, an audio signal, or a data signal is multiplexed.

[0045] The stream signal output from the demodulation unit (120) can be input to the control unit (170). The control unit (170) can output an image through the display (180) and output an audio through the audio output unit (185) after performing demultiplexing, image / audio signal processing, etc.

[0046] The external device interface unit (130) can transmit or receive data with a connected external device. To this end, the external device interface unit (130) may include an A / V input / output unit (not shown).

[0047] The external device interface unit (130) can be connected to external devices such as a DVD (Digital Versatile Disk), Blu-ray, game device, camera, camcorder, computer (laptop), set-top box, etc., via wired / wireless connection, and can also perform input / output operations with the external devices.

[0048] In addition, the external device interface unit (130) can establish a communication network with various remote control devices (200) as illustrated in FIG. 1, and receive a control signal related to the operation of the image display device (100) from the remote control device (200) or transmit data related to the operation of the image display device (100) to the remote control device (200).

[0049] The A / V input / output unit can receive video and audio signals from an external device. For example, the A / V input / output unit can 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) terminal, an RGB terminal, a D-SUB terminal, an IEEE 1394 terminal, an SPDIF terminal, a Liquid HD terminal, etc. Digital signals input through these terminals can be transmitted to the control unit (170). At this time, analog signals input through the CVBS terminal and the S-video terminal can be converted into digital signals through an analog-to-digital converter (not shown) and transmitted to the control unit (170).

[0050] The external device interface unit (130) may include a wireless communication unit (not shown) for short-range wireless communication with other electronic devices. Through this wireless communication unit, the external device interface unit (130) can exchange data with an adjacent mobile terminal. For example, in mirroring mode, the external device interface unit (130) may receive device information, running application information, application images, etc. from the mobile terminal.

[0051] The external device interface unit (130) can perform short-range wireless communication using Bluetooth, RFID (Radio Frequency Identification), infrared communication (IrDA, infrared Data Association), UWB (Ultra-Wideband), ZigBee, etc.

[0052] The network interface unit (135) can provide an interface for connecting the video display device (100) to a wired / wireless network including the Internet.

[0053] The network interface unit (135) may include a communication module (not shown) for connection to a wired / wireless network. For example, the network interface unit (135) may include a communication module for WLAN (Wireless LAN) (Wi-Fi), Wibro (Wireless broadband), Wimax (World Interoperability for Microwave Access), HSDPA (High Speed ​​Downlink Packet Access), etc.

[0054] The network interface unit (135) can transmit or receive data to or from other users or other electronic devices via the connected network or another network linked to the connected network.

[0055] The network interface unit (135) can receive web content or data provided by a content provider or network operator. That is, the network interface unit (135) can receive web content such as movies, advertisements, games, VOD, broadcast signals, and other information related thereto provided from a content provider or network provider via a network.

[0056] The network interface unit (135) can receive firmware update information and update files provided by the network operator, and transmit data to the Internet or content provider or network operator.

[0057] The network interface unit (135) can select and receive a desired application from among applications open to the public through a network.

[0058] The storage unit (140) may store programs for signal processing and control within the control unit (170), or may store processed video, audio, or data signals. 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 some of the stored application programs upon request from the control unit (170).

[0059] Programs stored in the storage unit (140) are not particularly limited as long as they can be executed by the control unit (170).

[0060] The storage unit (140) may also perform a function for temporarily storing video, audio, or data signals received from an external device through the external device interface unit (130).

[0061] The storage unit (140) can store information about a specific broadcast channel through a channel memory function such as a channel map.

[0062] Although the storage unit (140) of FIG. 2 is provided separately from the control unit (170), the scope of the present disclosure is not limited thereto, and the storage unit (140) may be included within the control unit (170).

[0063] The storage unit (140) may include at least one of volatile memory (e.g., DRAM, SRAM, SDRAM, etc.) or non-volatile memory (e.g., flash memory, hard disk drive (HDD), solid-state drive (SSD), etc.). In various embodiments of the present disclosure, the storage unit (140) and memory may be used interchangeably.

[0064] 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.

[0065] For example, a user input signal such as power on / off, channel selection, screen setting, etc. may be transmitted / received from a remote control device (200), a user input signal input from a local key (not shown) such as a power key, a channel key, a volume key, a setting key, etc. may be transmitted to the control unit (170), a user input signal input from a sensor unit (not shown) that senses a user's gesture may be transmitted to the control unit (170), or a signal from the control unit (170) may be transmitted to the sensor unit.

[0066] The input unit (160) may be provided on one side of the main body of the video display device (100). For example, the input unit (160) may include a touch pad, a physical button, etc.

[0067] The input unit (160) can receive various user commands related to the operation of the video display device (100) and transmit a control signal corresponding to the input command to the control unit (170).

[0068] The input unit (160) may include at least one microphone (not shown) and may receive the user's voice through the microphone.

[0069] The control unit (170) may include at least one processor, and may control the overall operation of the image display device (100) using the processor included therein. Here, the processor may be a general processor such as a central processing unit (CPU). Of course, the processor may be a dedicated device such as an ASIC or another hardware-based processor.

[0070] The control unit (170) can demultiplex a stream input through the tuner unit (110), the demodulator unit (120), the external device interface unit (130), or the network interface unit (135), or process the demultiplexed signals to generate and output a signal for video or audio output.

[0071] The display (180) can generate a driving signal by converting a video signal, data signal, OSD signal, control signal, etc. processed by the control unit (170) or a video signal, data signal, control signal, etc. received from the external device interface unit (130).

[0072] The display (180) may include a display panel (not shown) having a plurality of pixels.

[0073] The plurality of pixels provided on the display panel may have RGB sub-pixels. Alternatively, the plurality of pixels provided on the display panel may have RGBW sub-pixels. The display (180) may convert image signals, data signals, OSD signals, control signals, etc. processed by the control unit (170) to generate driving signals for the plurality of pixels.

[0074] The display (180) can be a PDP (Plasma Display Panel), an LCD (Liquid Crystal Display), an OLED (Organic Light Emitting Diode), a flexible display, etc., and may also be a 3D display. The 3D display (180) can be divided into a glasses-free type and a glasses type.

[0075] Meanwhile, the display (180) is configured as a touch screen and can be used as an input device in addition to an output device.

[0076] The audio output unit (185) receives a signal processed by the control unit (170) and outputs it as voice.

[0077] The image signal processed by the control unit (170) can be input to the display (180) and displayed as an image corresponding to the image signal. In addition, the image signal processed by the control unit (170) can also be input to an external output device through the external device interface unit (130).

[0078] The voice signal processed in the control unit (170) can be output as sound to the audio output unit (185). In addition, the voice signal processed in the control unit (170) can be input to an external output device through the external device interface unit (130).

[0079] Although not shown in FIG. 2, the control unit (170) may include a demultiplexing unit, an image processing unit, etc. This will be described later with reference to FIG. 3.

[0080] In addition, the control unit (170) can control the overall operation within the video display device (100). For example, the control unit (170) can control the tuner unit (110) to select (tune) a broadcast corresponding to a channel selected by the user or a previously stored channel.

[0081] In addition, the control unit (170) can control the image display device (100) by a user command or internal program input through the user input interface unit (150).

[0082] Meanwhile, the control unit (170) can control the display (180) to display an image. At this time, the image displayed on the display (180) may be a still image or a moving image, and may be a 2D image or a 3D image.

[0083] Meanwhile, the control unit (170) can cause a predetermined 2D object to be displayed within an image displayed on the display (180). For example, the object can be at least one of a connected web screen (newspaper, magazine, etc.), an EPG (Electronic Program Guide), various menus, widgets, icons, still images, videos, and text.

[0084] Meanwhile, the image display device (100) may further include a camera (not shown). The camera can capture images of a user. The camera can be implemented with a single camera, but is not limited thereto, and may also be implemented with multiple cameras. Meanwhile, the camera can be embedded in the image display device (100) above the display (180) or can be separately positioned. Image information captured by the camera can be input to the control unit (170).

[0085] The control unit (170) can recognize the user's location based on the image captured by the camera. For example, the control unit (170) can determine the distance (z-axis coordinate) between the user and the image display device (100). In addition, the control unit (170) can determine the x-axis coordinate and y-axis coordinate within the display (180) corresponding to the user's location.

[0086] The control unit (170) can detect the user's gesture based on an image captured from the camera unit, a signal detected from the sensor unit, or a combination thereof.

[0087] The power supply unit (190) can supply power to the entire image display device (100). In particular, it can supply power to a control unit (170) that can be implemented in the form of a system on chip (SOC), a display (180) for image display, and an audio output unit (185) for audio output.

[0088] Specifically, the power supply unit (190) may be equipped with a converter (not shown) that converts AC power into DC power and a Dc / Dc converter (not shown) that converts the level of DC power.

[0089] The remote control device (200) can transmit user input to the user input interface unit (150). To this end, the remote control device (200) can use Bluetooth, RF (Radio Frequency) communication, infrared (Infrared Radiation) communication, UWB (Ultra-wideband), ZigBee, etc. In addition, the remote control device (200) can receive images, voices, or data signals output from the user input interface unit (150) and display or output the same as voice on the remote control device (200).

[0090] Meanwhile, the above-described video display device (100) may be a digital broadcast receiver capable of receiving fixed or mobile digital broadcasts.

[0091] Meanwhile, the block diagram of the image display device (100) illustrated in FIG. 2 is only a block diagram for one embodiment of the present disclosure, and each component of the block diagram may be integrated, added, or omitted depending on the specifications of the image display device (100) actually implemented.

[0092] That is, two or more components may be combined into a single component, or a single component may be subdivided into two or more components, as needed. Furthermore, the functions performed by each block are intended to illustrate embodiments of the present disclosure, and their specific operations or devices do not limit the scope of the present disclosure.

[0093] Figure 3 is an internal block diagram of the control unit of Figure 2.

[0094] Referring to FIG. 3, a control unit (170) according to one embodiment of the present invention may include a demultiplexer (310), an audio processing unit (315), an image processing unit (320), a processor (330), an OSD generation unit (340), a mixer (345), a frame rate conversion unit (350), and / or a formatter (360). In addition, the control unit (170) may further include a data processing unit (not shown).

[0095] The demultiplexer (310) can demultiplex an input stream. For example, when MPEG-2 TS is input, it can be demultiplexed to separate it into video, audio, and data signals, respectively. Here, the stream signal input to the demultiplexer (310) may be a stream signal output from the tuner (110), the demodulator (120), or the external device interface (130).

[0096] The audio processing unit (315) can perform signal processing on a voice signal demultiplexed in the demultiplexing unit (310) or a voice signal directly input from the external device interface unit (130) or the network interface unit (1353). For this purpose, the audio processing unit (315) can be equipped with various decoders.

[0097] The audio processing unit (315) may include a mixer that mixes audio signals decoded by various decoders, for example, audio signals of various channels. The audio signals mixed by the mixer may be transmitted to the audio output unit (185).

[0098] The audio processing unit (315) can process bass, treble, volume control, etc., or automatically perform sound field signal processing.

[0099] The audio processing unit (315) can adjust at least one of the gain or phase for each frequency band of the voice signal.

[0100] The processed audio signal can be output as sound through the audio output unit (185). The audio output unit (185) may be configured as a digital amplifier (D-Amp) and / or a speaker. In this regard, this will be described later with reference to FIG. 4.

[0101] The image processing unit (320) can perform image processing of a demultiplexed image signal. To this end, the image processing unit (320) may include an image decoder (325) and a scaler (335).

[0102] The video decoder (325) can decode a demultiplexed video signal, and the scaler (335) can perform scaling so that the resolution of the decoded video signal can be output on the display (180).

[0103] The video decoder (325) may include decoders of various standards. For example, it may include an MPEG-2, H.264 decoder, a 3D video decoder for color images and depth images, a decoder for multi-view images, etc.

[0104] The processor (330) can control the overall operation within the image processing device (100) or the control unit (170). For example, the processor (330) can control the tuner (110) to select (tune) a broadcast corresponding to a channel selected by the user or a pre-stored channel.

[0105] In addition, the processor (330) can control the image processing device (100) by a user command or internal program input through the user input interface unit (150).

[0106] Additionally, the processor (330) can perform data transmission control with the network interface unit (135) or the external device interface unit (130).

[0107] Additionally, the processor (330) can control the operation of the demultiplexing unit (310), the image processing unit (320), the OSD generation unit (340), etc. within the control unit (170).

[0108] The OSD generation unit (340) can generate OSD signals based on user input or on its own. For example, based on a user input signal input through the input unit (160), it can generate signals for displaying various information in the form of graphics or text on the screen of the display (180).

[0109] The generated OSD signal may include various data such as the user interface screen of the image processing device (100), various menu screens, widgets, and icons. In addition, the generated OSD signal may include a 2D object or a 3D object.

[0110] Additionally, the OSD generation unit (340) can generate a pointer that can be displayed on the display (180) based on a pointing signal input from the remote control device (200).

[0111] The OSD generation unit (340) may include a pointing signal processing unit (not shown) that generates a pointer. It is also possible for the pointing signal processing unit (not shown) to be provided separately rather than within the OSD generation unit (240).

[0112] The mixer (345) can mix the OSD signal generated by the OSD generation unit (340) and the decoded image signal processed by the image processing unit (320). The mixed image signal can be provided to the frame rate conversion unit (350).

[0113] The frame rate converter (FRC) (350) can convert the frame rate of an input video. Meanwhile, the frame rate converter (350) can also output the video as is without a separate frame rate conversion.

[0114] The formatter (360) can arrange left-eye image frames and right-eye image frames of a frame rate-converted 3D image. In addition, it can output a synchronization signal (Vsync) for opening the left-eye glasses and right-eye glasses of a 3D viewing device (not shown).

[0115] Meanwhile, the formatter (360) can change the format of the input video signal into a video signal for display on the display (180) and output it.

[0116] Additionally, the formatter (360) can change the format of a 3D video signal. For example, it can change the format to any one of various 3D formats, such as a side-by-side format, a top-down format, a frame sequential format, an interlaced format, and a checker box format.

[0117] Meanwhile, the formatter (360) can also convert a 2D image signal into a 3D image signal. For example, according to a 3D image generation algorithm, an edge or a selectable object can be detected within a 2D image signal, and an object or a selectable object according to the detected edge can be separated and generated as a 3D image signal. At this time, the generated 3D image signal can be separated and aligned into a left-eye image signal (L) and a right-eye image signal (R), as described above.

[0118] Meanwhile, although not shown in the drawing, a 3D processor (not shown) for 3D effect signal processing may be further placed after the formatter (360). This 3D processor may process brightness, tint, and color adjustments of the image signal to improve the 3D effect. For example, it may perform signal processing to make the image clear at a close distance and blurry at a long distance. Meanwhile, the function of this 3D processor may be incorporated into the formatter (360) or incorporated into the image processing unit (320).

[0119] Meanwhile, a data processing unit (not shown) within the control unit (170) can perform data processing of a demultiplexed data signal. For example, if the demultiplexed data signal is an encoded data signal, it can be decoded. The encoded data signal may be electronic program guide information (EPG) information that includes broadcast information such as the start time and end time of a broadcast program broadcast on each channel.

[0120] Meanwhile, the block diagram of the control unit (170) illustrated in FIG. 3 is only a block diagram for one embodiment of the present invention, and each component of the block diagram may be integrated, added, or omitted depending on the specifications of the control unit (170) actually implemented.

[0121] In particular, the audio processing unit (315), the frame rate conversion unit (350), and the formatter (360) are not provided within the control unit (170), but may be provided separately or may be provided separately as one module.

[0122] Figure 4 is a drawing illustrating a control method of the remote control device of Figure 2.

[0123] Referring to FIG. 4, it can be confirmed that a pointer (205) corresponding to a remote control device (200) is displayed on the display (180) of the video display device (100).

[0124] Referring to (a) of FIG. 4, the user can move or rotate the remote control device (200) up and down, left and right, forward and backward. At this time, the pointer (205) displayed on the display (180) of the image display device (100) can be displayed in response to the movement of the remote control device (200). As shown in the drawing, the pointer (205) of this remote control device (200) is moved and displayed according to the movement in 3D space, so it can be called a space remote control or a 3D pointing device.

[0125] Referring to (b) of FIG. 4, when the user moves the remote control device (200) to the left, it can be confirmed that the pointer (205) displayed on the display (180) of the image display device (100) also moves to the left in response to the movement of the remote control device (200).

[0126] Information about the movement of the remote control device (200) detected through the sensor of the remote control device (200) can be transmitted to the image display device (100). The image display device (100) can calculate the coordinates of the pointer (205) from the information about the movement of the remote control device (200). The image display device (100) can display the pointer (205) to correspond to the calculated coordinates.

[0127] Referring to (c) of FIG. 4, a user can move the remote control device (200) away from the display (180) while pressing a specific button provided on the remote control device (200). As a result, a selection area within the display (180) corresponding to the pointer (205) can be zoomed in and displayed in an enlarged manner. Conversely, when a user moves the remote control device (200) closer to the display (180) while pressing a specific button provided on the remote control device (200), a selection area within the display (180) corresponding to the pointer (205) can be zoomed out and displayed in a reduced manner.

[0128] Meanwhile, when the remote control device (200) moves away from the display (180), the selection area may be zoomed out, and when the remote control device (200) moves closer to the display (180), the selection area may be zoomed in.

[0129] Meanwhile, when the user presses a specific button within the remote control device (200), recognition of up, down, left, and right movements may be excluded. That is, when the remote control device (200) moves away from or toward the display (180), up, down, left, and right movements are not recognized, and only forward and backward movements may be recognized. When the user does not press a specific button within the remote control device (200), only up, down, left, and right movements of the remote control device (200) may be recognized, and accordingly, only the pointer (205) may be moved.

[0130] Meanwhile, the movement speed or movement direction of the pointer (205) can correspond to the movement speed or movement direction of the remote control device (200).

[0131] FIG. 5 is a block diagram of a signal processing device according to one embodiment of the present disclosure.

[0132] Referring to FIG. 5, a signal processing device (500) according to one embodiment of the present disclosure may include a control unit (510), a plurality of digital amplifiers (521, 522, 523), a first switching circuit (515), and / or a second switching circuit (525). In FIG. 5, it will be described as an example that the signal processing device (500) includes three digital amplifiers (521, 522, 523), and the three digital amplifiers (521, 522, 523) correspond to three speakers (501, 502, 503), respectively.

[0133] The signal processing device (500) can be electrically connected to a full-range speaker (501), a tweeter speaker (502), and a woofer speaker (503), respectively. Referring to the frequency response graph (610) for the full-range speaker (501) illustrated in FIG. 6A, the full-range speaker (501) can output audio of a desired sound quality from a low-frequency range (e.g., 100 Hz to 500 Hz) to a high-frequency range (e.g., 3 kHz to 20 kHz). Meanwhile, referring to the frequency response graph (620) for the tweeter speaker (502) illustrated in FIG. 6B, the tweeter speaker (502) can output audio of a better sound quality in a high-frequency range (e.g., 3 kHz to 20 kHz) than in a low-frequency range (e.g., 100 Hz to 500 Hz). Meanwhile, referring to the frequency response graph (630) for the woofer speaker (503) illustrated in FIG. 6c, the woofer speaker (503) can output audio with better sound quality in the low-frequency range (e.g., 100 Hz to 500 Hz) than in the high-frequency range (e.g., 3 kHz to 20 kHz).

[0134] Hereinafter, a digital amplifier (521) corresponding to a full-range speaker (501) may be named a full-range amplifier (521), a digital amplifier (522) corresponding to a tweeter speaker (502) may be named a high-range amplifier (522), and a digital amplifier (523) corresponding to a woofer speaker (503) may be named a low-range amplifier (523).

[0135] The signal processing device (500) may be included in the image display device (100). The signal processing device (500) may be included at least in the control unit (170) of the image display device (100). For example, the control unit (510) of the signal processing device (500) may be included in the processor (330), and a plurality of digital amplifiers (521, 522, 523) may be included in the audio processing unit (315). In the present disclosure, the signal processing device (500) is included in the image display device (100) as an example, but is not limited thereto. For example, the signal processing device (500) may be included in an audio device separately arranged from the image display device (100).

[0136] The control unit (510) can transmit a voice signal to a plurality of digital amplifiers (521, 522, 523) through I2S (Integrated Interchip Sound) communication. The voice signals transmitted to the plurality of digital amplifiers (521, 522, 523) can correspond to a plurality of speakers (501, 502, 503). For example, a voice signal for the entire sound range including the low-pitched range to the high-pitched range (hereinafter, “full-pitched signal”) can be transmitted to the full-pitched amplifier (521), a voice signal for the high-pitched range (hereinafter, “high-pitched signal”) can be transmitted to the high-pitched amplifier (522), and a voice signal for the low-pitched range (hereinafter, “low-pitched signal”) can be transmitted to the low-pitched amplifier (523).

[0137] The control unit (510) can determine the status of multiple digital amplifiers (521, 522, 523).

[0138] According to one embodiment, each of the digital amplifiers (521, 522, 523) may include a register that stores a value indicating the occurrence of an error related to an operation. When an error related to an operation occurs, each of the digital amplifiers (521, 522, 523) may store a value indicating the occurrence of an error in the register. The control unit (510) may determine the status of the plurality of digital amplifiers (521, 522, 523) by checking the values ​​stored in the registers included in the plurality of digital amplifiers (521, 522, 523) through I2C (Inter-Integrated Circuit) communication.

[0139] According to one embodiment, each of the digital amplifiers (521, 522, 523) may include a predetermined pin for outputting a signal indicating a status. Each of the digital amplifiers (521, 522, 523) may output a signal corresponding to an error through a predetermined pin when an error related to operation occurs. For example, each of the digital amplifiers (521, 522, 523) may output a PWM signal whose value periodically changes through a predetermined pin when the status is good, and may output a signal whose value continues to be specific through a predetermined pin when the status is bad. The control unit (510) may determine the status of the plurality of digital amplifiers (521, 522, 523) based on the signals output from the predetermined pins of each of the digital amplifiers (521, 522, 523).

[0140] The plurality of digital amplifiers (521, 522, 523) can adjust at least one of the gain or phase for each frequency band of the voice signal. The plurality of digital amplifiers (521, 522, 523) can adjust the gain for each frequency band of the voice signal based on data preset in relation to the gain. For example, the full-range amplifier (521) can adjust the gain of the full-range signal transmitted from the control unit (510) based on full-range data related to the gain of the entire range. For example, the high-range amplifier (522) can adjust the gain of the high-range signal transmitted from the control unit (510) based on high-range data related to the gain of the high-range. For example, the low-range amplifier (523) can adjust the gain of the low-range signal transmitted from the control unit (510) based on low-range data related to the gain of the low-range.

[0141] A plurality of digital amplifiers (521, 522, 523) can process a voice signal according to parameters for processing the voice signal. Here, the parameters can include a compression ratio, a compression point (knee point), an attack time, a release time, etc.

[0142] A plurality of digital amplifiers (521, 522, 523) can process audio signals transmitted from the control unit (510). A plurality of digital amplifiers (521, 522, 523) can output a PWM (Pulse Width Modulation) signal for audio output based on the audio signals transmitted from the control unit (510).

[0143] The first switching circuit (515) may be placed between the control unit (510) and the high-frequency amplifier (522). The first switching circuit (515) may be connected to the output terminal of the control unit (510) and the input terminal of the high-frequency amplifier (522). The first switching circuit (515) may operate so that either the full-range signal or the high-frequency signal output from the control unit (510) is transmitted to the high-frequency amplifier (522).

[0144] The second switching circuit (525) may be arranged between a plurality of digital amplifiers (521, 522) and a full-range speaker (501). The second switching circuit (525) may be connected to output terminals of the plurality of digital amplifiers (521, 522) and the full-range speaker (501). The second switching circuit (525) may operate so that the full-range speaker (501) is electrically connected to either the full-range amplifier (521) or the high-range amplifier (522).

[0145] In the present disclosure, the signal processing device (500) is described as an example in which the high-frequency amplifier (522) is used as a substitute for signal processing for a full-frequency signal when the full-frequency amplifier (521) is defective, but is not limited thereto. For example, the signal processing device (500) may be configured to use the full-frequency amplifier (521) or the high-frequency amplifier (522) as a substitute for signal processing for a low-frequency signal when the low-frequency amplifier (523) is defective, or the signal processing device (500) may be configured to use the full-frequency amplifier (521) or the low-frequency amplifier (522) as a substitute for signal processing for a high-frequency signal when the high-frequency amplifier (523) is defective.

[0146] The control unit (510) can control the first switching circuit (515) and the second switching circuit (525) based on the state of the full-range amplifier (521). The control unit (510) can determine data used in the high-range amplifier (522) in relation to adjusting the gain of the voice signal based on the state of the full-range amplifier (521).

[0147] Referring to FIGS. 7 and 8, the control unit (510) can control the first switching circuit (515) so that a high-frequency signal is transmitted to the high-frequency amplifier (522) when the state of the full-range amplifier (521) is good. In addition, the control unit (510) can control the second switching circuit (525) so that the full-range speaker (501) is connected to the full-range amplifier (521).

[0148] The full-range amplifier (521) can adjust the gain of the full-range signal transmitted from the control unit (510) based on full-range data (810) related to the gain of the full-range.

[0149] The high-frequency amplifier (522) can adjust the gain of the high-frequency signal transmitted from the control unit (510) based on the high-frequency data (820) related to the gain of the high-frequency range. In the case of the high-frequency data (820), the gain value can be set to be greater in the high-frequency range (e.g., 3 kHz to 20 kHz) than in the low-frequency range (e.g., 100 Hz to 500 Hz).

[0150] The low-frequency amplifier (523) can adjust the gain of the low-frequency signal transmitted from the control unit (510) based on low-frequency data (830) related to the gain of the low-frequency range. In the case of the low-frequency data (830), the gain value can be set to be greater in the low-frequency range (e.g., 100 Hz to 500 Hz) than in the high-frequency range (e.g., 3 kHz to 20 kHz).

[0151] Meanwhile, referring to FIGS. 9 and 10, the control unit (510) can control the first switching circuit (515) so that the full-range signal is transmitted to the high-range amplifier (522) when the state of the full-range amplifier (521) is bad. In addition, the control unit (510) can control the second switching circuit (525) so that the full-range speaker (501) is connected to the high-range amplifier (522).

[0152] At this time, the high-frequency amplifier (522) can adjust the gain of the full-range signal transmitted from the control unit (510) based on the first alternative data (1000) related to the gain of the full-range. Here, the first alternative data (1000) may be different from the full-range data (810) used in the full-range amplifier (521).

[0153] Considering that the tweeter speaker (503) is disadvantageous compared to the full-range speaker (501) in frequency response for the low-frequency range (e.g., 100 Hz to 500 Hz), in the low-frequency range, the gain value of the first alternative data (1000) may be set to be smaller than the gain value of the full-frequency range data (810) and larger than the gain value of the high-frequency range data (820). For example, in the low-frequency range (e.g., 100 Hz to 500 Hz), the gain value of the first alternative data (1000) may be set to be 6 dB smaller than the gain value of the full-frequency range data (810) and 6 dB larger than the gain value of the high-frequency range data (820). At this time, if the gain value is set to 6dB larger, the audio output can be increased by 4 times, and if the gain value is set to 6dB smaller, the audio output can be decreased by 4 times.

[0154] Considering that the full-range speaker (501) is disadvantageous compared to the tweeter speaker (502) in the frequency response for the high-frequency range (e.g., 4 kHz to 20 kHz), in the high-frequency range, the gain value of the first alternative data (1000) may be set to be greater than the gain value of the full-range data (810) and less than the gain value of the high-frequency range data (820). For example, in the high-frequency range (e.g., 4 kHz to 20 kHz), the gain value of the first alternative data (1000) may be set to be 6 dB greater than the gain value of the full-range data (810) and less than the gain value of the high-frequency range data (820).

[0155] Meanwhile, even if the state of the full-range amplifier (521) is bad, the low-range amplifier (523) can adjust the gain of the low-range signal transmitted from the control unit (510) based on low-range data (830) related to the gain of the low-range.

[0156] Fig. 11 is a block diagram of a signal processing device according to another embodiment of the present disclosure. Detailed descriptions of content overlapping with those described in Figs. 5 to 10 will be omitted.

[0157] Referring to FIG. 11, the signal processing device (500) may include a control unit (510), a plurality of digital amplifiers (521, 523), a first switching circuit (515) and / or a second switching circuit (525). In FIG. 11, it will be described as an example that two digital amplifiers (521, 523) corresponding to a full-range speaker (501) and a woofer speaker (503) are included in the signal processing device (500).

[0158] The control unit (510) can transmit a voice signal to a plurality of digital amplifiers (521, 523) via I2S communication. The voice signals transmitted to the plurality of digital amplifiers (521, 523) can correspond to a plurality of speakers (501, 503). For example, a full-range signal can be transmitted to a full-range amplifier (521), and a low-range signal can be transmitted to a low-range amplifier (523).

[0159] The first switching circuit (515) may be placed between the control unit (510) and the low-frequency amplifier (523). The first switching circuit (515) may be connected to the output terminal of the control unit (510) and the input terminal of the low-frequency amplifier (523). The first switching circuit (515) may operate so that either the full-frequency signal or the low-frequency signal output from the control unit (510) is transmitted to the low-frequency amplifier (523).

[0160] The second switching circuit (525) may be arranged between a plurality of digital amplifiers (521, 523) and a full-range speaker (501). The second switching circuit (525) may be connected to output terminals of the plurality of digital amplifiers (521, 523) and the full-range speaker (501). The second switching circuit (525) may operate so that the full-range speaker (501) is electrically connected to either the full-range amplifier (521) or the low-range amplifier (523).

[0161] The control unit (510) can determine the status of a plurality of digital amplifiers (521, 523). The control unit (510) can control the first switching circuit (515) and the second switching circuit (525) based on the status of the full-range amplifier (521). The control unit (510) can determine data used in the low-range amplifier (523) in relation to adjusting the gain of the voice signal based on the status of the full-range amplifier (521).

[0162] For example, when the state of the full-range amplifier (521) is good, the control unit (510) can control the first switching circuit (515) so that the low-range signal is transmitted to the low-range amplifier (523), and can control the second switching circuit (525) so that the full-range speaker (501) is connected to the full-range amplifier (521). At this time, the low-range amplifier (523) can adjust the gain of the low-range signal transmitted from the control unit (510) based on low-range data related to the gain of the low-range.

[0163] For example, if the state of the full-range amplifier (521) is bad, the control unit (510) can control the first switching circuit (515) so that the full-range signal is transmitted to the low-range amplifier (523), and can control the second switching circuit (525) so that the full-range speaker (501) is connected to the low-range amplifier (523). At this time, the low-range amplifier (523) can adjust the gain of the full-range signal transmitted from the control unit (510) based on second alternative data related to the gain of the entire range. At this time, the second alternative data may be different from the full-range data used in the full-range amplifier (521).

[0164] Considering that the full-range speaker (501) is disadvantageous compared to the woofer speaker (503) in frequency response for the low-frequency range and / or the mid-frequency range (e.g., 20 Hz to 1 kHz), the gain value of the second alternative data in the low-frequency range and / or the mid-frequency range may be set to be smaller than the gain value of the low-frequency range data and larger than the gain value of the full-frequency range data. For example, in the low-frequency range and / or the mid-frequency range (e.g., 20 Hz to 1 kHz), the gain value of the second alternative data may be set to be 6 dB smaller than the gain value of the low-frequency range data and 6 dB larger than the gain value of the full-frequency range data. In this case, when the gain value is set to be 6 dB larger, the audio output may be increased by four times, and when the gain value is set to be 6 dB smaller, the audio output may be decreased by four times.

[0165] Considering that the woofer speaker (503) is disadvantageous compared to the full-range speaker (501) in frequency response for the high-frequency range (e.g., 4 kHz to 20 kHz), in the high-frequency range, the gain value of the first alternative data may be set to be greater than the gain value of the low-frequency range data and less than the gain value of the full-frequency range data. For example, in the high-frequency range (e.g., 4 kHz to 20 kHz), the gain value of the first alternative data may be set to be 6 dB greater than the gain value of the low-frequency range data and 6 dB less than the gain value of the full-frequency range data.

[0166] FIG. 12 is a flowchart of an operation method of an image display device according to one embodiment of the present disclosure.

[0167] Referring to FIG. 12, the image display device (100) can be powered on in operation S1201. For example, the image display device (100) can be powered on when a user input of pressing a power key included in an input unit (160) is received while the power is off, or when a signal for turning the power on is received from a remote control device (200). When the power of the image display device (100) is turned on, booting of the image display device (100) can be initiated.

[0168] The video display device (100) can determine whether the power is turned on for the first time in operation S1202. The video display device (100) can determine that the power is turned on for the first time when booting is performed for the first time.

[0169] The video display device (100) can determine whether it is connected to a network including the Internet through the network interface unit (135) based on the power being turned on for the first time in operation S1203.

[0170] In operation S1204, when connected to a network, the video display device (100) can set the time at which the power is first turned on (hereinafter, referred to as the reference time) based on data received through the network. For example, the video display device (100) can set the year, month, and day at which the power is first turned on based on data received through the network.

[0171] The video display device (100), in operation S1205, can set a reference point based on user input when not connected to a network. For example, the video display device (100) can set the year, month, and day selected by the user as the reference point based on a signal received from the remote control device (200).

[0172] The video display device (100) can check the status of the full-range amplifier (521) in operation S1206. For example, the video display device (100) can determine the status of the full-range amplifier (521) based on a value stored in a register included in the full-range amplifier (521) and / or a signal output from a specific pin of the full-range amplifier (521).

[0173] The video display device (100) can determine whether the state of the full-range amplifier (521) is defective in operation S1207.

[0174] In operation S1208, if the full-range amplifier (521) is in a defective state, the video display device (100) can determine whether the warranty period for repair and / or replacement of the components included in the video display device (100) has expired. Here, the warranty period may vary depending on the country, region, etc. where the user purchases or uses the video display device (100). For example, the video display device (100) can determine that the warranty period has expired if a predetermined period of time (e.g., 1 year) corresponding to the warranty period has elapsed from a preset reference point in time.

[0175] The video display device (100) may, in operation S1209, substitute one of the high-frequency amplifier (522) and the low-frequency amplifier (523) for signal processing of a full-range signal when the warranty period has expired. For example, when the high-frequency amplifier (522) is substituted for signal processing of a full-range signal, the full-range signal may be transmitted to the high-frequency amplifier (522) through the first switching circuit (515), and the signal output from the high-frequency amplifier (522) may be transmitted to the full-range speaker (501) and the tweeter speaker (502) through the second switching circuit (525).

[0176] The video display device (100) may, in operation S1210, output a screen through the display (180) indicating that one of the high-frequency amplifier (522) and the low-frequency amplifier (523) is switched to a predetermined mode for processing a full-range signal. For example, the video display device (100) may output a screen including a message indicating that the full-range amplifier (521) is in a defective state and a message indicating that one of the high-frequency amplifier (522) and the low-frequency amplifier (523) is used as a substitute when switched to a predetermined mode.

[0177] Meanwhile, in operation S1211, the video display device (100) may output a screen through the display (180) that provides guidance on free service regarding repair or replacement of the full-range amplifier (521) if the warranty period has not expired. For example, the video display device (100) may output a screen that includes the time elapsed from a preset reference point in time, the time remaining until the expiration of the warranty period, a message indicating that repair or replacement of the full-range amplifier (521) is possible, etc.

[0178] According to one embodiment, the image display device (100) may output a user interface through the display (180) for switching one of the high-frequency amplifier (522) and the low-frequency amplifier (523) to a predetermined mode for processing a full-range signal, if the warranty period has not expired. In this case, if the user selects switching to the predetermined mode through the user interface output through the display (180), the image display device (100) may substitute one of the high-frequency amplifier (522) and the low-frequency amplifier (523) for signal processing for the full-range signal.

[0179] As described above, according to various embodiments of the present disclosure, audio can be provided to a user even when a digital amplifier is defective.

[0180] According to at least one embodiment of the present disclosure, information regarding services related to repair or replacement of a digital amplifier can be appropriately provided to a user.

[0181] Referring to FIGS. 1 to 12, a signal processing device (500) according to one aspect of the present disclosure includes: a plurality of digital amplifiers each corresponding to a plurality of speakers; a control unit that outputs a voice signal to each of the plurality of digital amplifiers; a first switching circuit that operates so that either a first voice signal output to a first digital amplifier or a second voice signal output to a second digital amplifier is transmitted to the second digital amplifier; and a second switching circuit that operates so that a first speaker corresponding to the first digital amplifier is electrically connected to either the first digital amplifier or the second digital amplifier, wherein the control unit can control the first switching circuit and the second switching circuit based on a state of the first digital amplifier.

[0182] In addition, according to one aspect of the present disclosure, when the state of the first digital amplifier is bad, the control unit may control the first switching circuit so that the first audio signal is transmitted to the second digital amplifier, and control the second switching circuit so that the second digital amplifier and the first speaker are electrically connected, and when the state of the first digital amplifier is good, the control unit may control the first switching circuit so that the second audio signal is transmitted to the second digital amplifier, and control the second switching circuit so that the first digital amplifier and the first speaker are electrically connected.

[0183] In addition, according to one aspect of the present disclosure, the first speaker may correspond to a first sound range, and the second speaker corresponding to the second digital amplifier may correspond to a second sound range included in the first sound range.

[0184] Additionally, according to one aspect of the present disclosure, the first speaker may be a full-range speaker, and the second speaker may be any one of a woofer speaker and a tweeter speaker.

[0185] In addition, according to one aspect of the present disclosure, each of the plurality of digital amplifiers adjusts a gain for a voice signal received from the control unit based on data preset with respect to a gain, and the second digital amplifier adjusts a gain for the first voice signal based on first data when the state of the digital amplifier is bad, and adjusts a gain for the second voice signal based on second data different from the first data when the state of the digital amplifier is good.

[0186] In addition, according to one aspect of the present disclosure, when the second sound range corresponds to a sound range below a predetermined frequency among the first sound ranges, in the low sound range, the gain value of the first data may be smaller than the gain value of the second data and larger than the gain value of the third data corresponding to the first digital amplifier, and in the high sound range, the gain value of the first data may be larger than the gain value of the second data and smaller than the gain value of the third data.

[0187] In addition, according to one aspect of the present disclosure, when the second sound range corresponds to a sound range higher than a predetermined frequency among the first sound ranges, in the low sound range, the gain value of the first data may be greater than the gain value of the second data and less than the gain value of the third data corresponding to the first digital amplifier, and in the high sound range, the gain value of the first data may be less than the gain value of the second data and greater than the gain value of the third data.

[0188] In addition, according to one aspect of the present disclosure, the first digital amplifier includes a register that stores a value indicating the occurrence of an error related to the operation of the first digital amplifier, and the control unit can determine the status of the first digital amplifier based on the value stored in the register included in the first digital amplifier.

[0189] In addition, according to one aspect of the present disclosure, the first digital amplifier includes a pin that outputs a signal indicating a state of the first digital amplifier, and the control unit can determine that the state of the first digital amplifier is good based on the signal output through the pin, and can determine the state of the first digital amplifier based on a second signal output through the pin.

[0190] An image display device (100) according to one aspect of the present disclosure includes: a display; a plurality of speakers; a plurality of digital amplifiers respectively corresponding to the plurality of speakers; a control unit which outputs audio signals to each of the plurality of digital amplifiers; a first switching circuit which operates so that either a first audio signal output to a first digital amplifier or a second audio signal output to a second digital amplifier is transmitted to the second digital amplifier; and a second switching circuit which operates so that either the first digital amplifier or the second digital amplifier is electrically connected to a first speaker corresponding to the first digital amplifier, wherein the control unit can control the first switching circuit and the second switching circuit based on a state of the first digital amplifier.

[0191] In addition, according to one aspect of the present disclosure, when the state of the first digital amplifier is bad, the control unit may control the first switching circuit so that the first audio signal is transmitted to the second digital amplifier, and control the second switching circuit so that the second digital amplifier and the first speaker are electrically connected, and when the state of the first digital amplifier is good, the control unit may control the first switching circuit so that the second audio signal is transmitted to the second digital amplifier, and control the second switching circuit so that the first digital amplifier and the first speaker are electrically connected.

[0192] In addition, according to one aspect of the present disclosure, the control unit may calculate an elapsed time from the time when the power of the image display device is first turned on to the time when the state of the first digital amplifier is determined to be defective, and if the calculated time is less than a predetermined time, output a first screen regarding repair or replacement of the first digital amplifier through the display, and if the calculated time is greater than or equal to the predetermined time, output a second screen regarding a predetermined mode for processing the first audio signal using the second digital amplifier through the display.

[0193] In addition, according to one aspect of the present disclosure, the image display device (100) further includes a network interface unit, and the control unit can set the point in time when the power of the image display device is first turned on based on data acquired using a network connected through the network interface unit.

[0194] Additionally, according to one aspect of the present disclosure, the first speaker may be a full-range speaker, and the second speaker may be any one of a woofer speaker and a tweeter speaker.

[0195] In addition, according to one aspect of the present disclosure, each of the plurality of digital amplifiers adjusts a gain for a voice signal received from the control unit based on data preset with respect to a gain, and the second digital amplifier adjusts a gain for the first voice signal based on first data when the state of the digital amplifier is bad, and adjusts a gain for the second voice signal based on second data different from the first data when the state of the digital amplifier is good.

[0196] The attached drawings are only intended to facilitate understanding of the embodiments disclosed in this specification, and the technical ideas disclosed in this specification are not limited by the attached drawings, and should be understood to include all modifications, equivalents, or substitutes included in the spirit and technical scope of the present disclosure.

[0197] Meanwhile, the operating method of the present disclosure can be implemented as processor-readable code on a processor-readable recording medium. A processor-readable recording medium includes all types of recording devices that store data that can be read by a processor. Examples of processor-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage devices, etc., and also include those implemented in the form of a carrier wave, such as transmission via the Internet. Furthermore, the processor-readable recording medium can be distributed across network-connected computer systems, so that the processor-readable code can be stored and executed in a distributed manner.

[0198] In addition, although the preferred embodiments of the present disclosure have been illustrated and described above, the present disclosure is not limited to the specific embodiments described above, and various modifications may be made by a person having ordinary skill in the art to which the present invention pertains without departing from the gist of the present disclosure as claimed in the claims, and such modifications should not be understood individually from the technical idea or prospect of the present disclosure.

Claims

1. Multiple digital amplifiers each corresponding to multiple speakers; A control unit that outputs a voice signal to each of the plurality of digital amplifiers; A first switching circuit that operates to transmit either a first audio signal output from a first digital amplifier or a second audio signal output from a second digital amplifier to the second digital amplifier; and A first speaker corresponding to the first digital amplifier includes a second switching circuit that operates to be electrically connected to either the first digital amplifier or the second digital amplifier, The above control unit, A signal processing device characterized in that it controls the first switching circuit and the second switching circuit based on the state of the first digital amplifier.

2. In paragraph 1, The above control unit, When the state of the first digital amplifier is bad, the first switching circuit is controlled so that the first audio signal is transmitted to the second digital amplifier, and the second switching circuit is controlled so that the second digital amplifier and the first speaker are electrically connected. A signal processing device characterized in that, when the state of the first digital amplifier is good, the first switching circuit is controlled so that the second audio signal is transmitted to the second digital amplifier, and the second switching circuit is controlled so that the first digital amplifier and the first speaker are electrically connected.

3. In paragraph 1, The above first speaker corresponds to the first frequency range, A signal processing device characterized in that the second speaker corresponding to the second digital amplifier corresponds to a second sound range included in the first sound range.

4. In paragraph 3, The above first speaker is a full-range speaker, A signal processing device characterized in that the second speaker is one of a woofer speaker and a tweeter speaker.

5. In paragraph 2, Each of the plurality of digital amplifiers adjusts the gain for the voice signal received from the control unit based on data preset with respect to the gain, The above second digital amplifier, If the state of the above digital amplifier is bad, the gain for the first voice signal is adjusted based on the first data, A signal processing device characterized in that, when the state of the digital amplifier is good, the gain for the second voice signal is adjusted based on second data that is different from the first data.

6. In paragraph 5, If the second sound range corresponds to a sound range below a predetermined frequency among the first sound ranges, In the low frequency range, the gain value of the first data is smaller than the gain value of the second data and larger than the gain value of the third data corresponding to the first digital amplifier. A signal processing device characterized in that, in a high-frequency range, the gain value of the first data is greater than the gain value of the second data and less than the gain value of the third data.

7. In paragraph 5, If the second sound range corresponds to a sound range higher than a predetermined frequency among the first sound ranges, In the low frequency range, the gain value of the first data is greater than the gain value of the second data and less than the gain value of the third data corresponding to the first digital amplifier. A signal processing device characterized in that, in a high-frequency range, the gain value of the first data is smaller than the gain value of the second data and larger than the gain value of the third data.

8. In paragraph 1, The first digital amplifier includes a register that stores a value indicating the occurrence of an error related to the operation of the first digital amplifier, The above control unit, A signal processing device characterized in that the status of the first digital amplifier is determined based on the value stored in the register included in the first digital amplifier.

9. In paragraph 1, The first digital amplifier includes a pin that outputs a signal indicating the status of the first digital amplifier, The above control unit, Based on the signal output through the pin, it is determined that the state of the first digital amplifier is good, A signal processing device characterized in that the state of the first digital amplifier is determined based on the second signal being output through the pin.

10. Display; Multiple speakers; A plurality of digital amplifiers each corresponding to the plurality of speakers; A control unit that outputs a voice signal to each of the plurality of digital amplifiers; A first switching circuit that operates to transmit either a first audio signal output from a first digital amplifier or a second audio signal output from a second digital amplifier to the second digital amplifier; and One of the first digital amplifier and the second digital amplifier includes a second switching circuit that operates to be electrically connected to a first speaker corresponding to the first digital amplifier, The above control unit, A signal processing device characterized in that it controls the first switching circuit and the second switching circuit based on the state of the first digital amplifier.

11. In paragraph 10, The above control unit, When the state of the first digital amplifier is bad, the first switching circuit is controlled so that the first audio signal is transmitted to the second digital amplifier, and the second switching circuit is controlled so that the second digital amplifier and the first speaker are electrically connected. An image display device characterized in that, when the state of the first digital amplifier is good, the first switching circuit is controlled so that the second audio signal is transmitted to the second digital amplifier, and the second switching circuit is controlled so that the first digital amplifier and the first speaker are electrically connected.

12. In paragraph 10, The above control unit, Calculate the elapsed time from the time the power of the above video display device is first turned on to the time when the status of the first digital amplifier is determined to be defective, If the calculated time is less than a predetermined time, a first screen regarding repair or replacement of the first digital amplifier is output through the display, A video display device characterized in that, if the calculated time is greater than or equal to the predetermined time, a second screen is output through the display in a predetermined mode for processing the first audio signal using the second digital amplifier.

13. In paragraph 12, Including the network interface section, The above control unit, A video display device characterized in that the point in time at which the power of the video display device is first turned on is set based on data acquired using a network connected through the network interface unit.

14. In paragraph 12, The above first speaker is a full-range speaker, A video display device characterized in that the second speaker is one of a woofer speaker and a tweeter speaker.

15. In paragraph 12, Each of the plurality of digital amplifiers adjusts the gain for the voice signal received from the control unit based on data preset with respect to the gain, The above second digital amplifier, If the state of the above digital amplifier is bad, the gain for the first voice signal is adjusted based on the first data, An image display device characterized in that, when the state of the digital amplifier is good, the gain for the second audio signal is adjusted based on second data that is different from the first data.

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