Image display apparatus

Abstract

An image display apparatus is provided. An image display device according to the present disclosure includes: a display; an audio output device; an interface that exchanges data with an external sound output device; and a signal processing device configured, in a simultaneous output mode, to output a first audio signal to the audio output device and to output a second audio signal to the sound output device, and, in a single sound output mode, to output a third audio signal to the audio output device, wherein a volume level of a first sound output from the audio output device based on the first audio signal is different from a volume level of a third sound output from the audio output device based on the third audio signal. Accordingly, a sense of difference may be reduced in a case where the sound output device and the image display apparatus output sound at the same time.

Description

Technical Field

[0001] The present disclosure relates to an image display apparatus, and more particularly, to an image display apparatus capable of reducing a sense of difference in a case where the image display apparatus and a sound output device simultaneously output sounds. Background Art

[0002] An image display device is a device that can display various images.

[0003] When an image is displayed on the image display device, a sound corresponding to the image is output.

[0004] As users demand full, rich sound, the output power required for image display devices to output sound has increased, and the use of separate sound output devices has also increased.

[0005] However, when the sound output device and the image display apparatus output sound simultaneously, there is a disadvantage in that a sense of difference is generated between the sound output from the sound output device and the sound output from the image display apparatus, thereby destroying the immersion of the user when listening to the sound. Summary of the invention

[0006] An object of the present disclosure is to provide an image display apparatus capable of reducing a sense of difference in a case where the image display apparatus and a sound output device simultaneously output sounds.

[0007] Another object of the present disclosure is to provide an image display device capable of outputting stable sound in a case where the image display device outputs sound alone.

[0008] To achieve the above and other objectives, an image display device according to an embodiment of the present disclosure includes: a display; an audio output device configured to output sound; an interface configured to exchange data with an external sound output device; and a signal processing device, which is configured to output a first audio signal to the audio output device and a second audio signal to the sound output device in a simultaneous sound output mode of the sound output device and the audio output device, and is configured to output a third audio signal to the audio output device in a single sound output mode of the audio output device, wherein a volume level of a first sound output from the audio output device based on the first audio signal is different from a volume level of a third sound output from the audio output device based on the third audio signal.

[0009] Furthermore, in the simultaneous sound output mode, the signal processing device may be configured to calculate the output gain of the first audio signal based on output power information or additional offset information of the sound output device.

[0010] Furthermore, the interface may be configured to receive output power information or additional offset information from the sound output device, wherein in the simultaneous sound output mode, the signal processing device may be configured to calculate the output gain of the first audio signal based on the output power information or the additional offset information.

[0011] Furthermore, in the simultaneous sound output mode, the signal processing device may be configured to calculate an output gain of the first audio signal based on volume setting information of the audio output device and output power information or additional offset information of the sound output device.

[0012] Furthermore, in the simultaneous sound output mode, the signal processing device may be configured to calculate an output gain of the first audio signal based on volume setting information of the audio output device, sound mode information, and output power information or additional offset information of the sound output device.

[0013] As the level of the volume setting information of the audio output device increases, or the level of the output power information decreases, or the level of the additional offset information increases, the signal processing device may be configured to increase the output gain of the first audio signal.

[0014] In addition, after the sound output device is turned on, the interface can be configured to receive output power information or additional offset information of the sound output device through the first transmission line, wherein in the simultaneous sound output mode, the interface can be configured to send a second audio signal to the sound output device through the second transmission line.

[0015] Furthermore, in a case where the sound output device is turned off during operation in the simultaneous sound output mode, the signal processing device may be configured to switch to a single sound output mode in which only the audio output device outputs sound.

[0016] Furthermore, while displaying the broadcast video on the display, the signal processing device may be configured to control a volume level of a first sound based on a first audio signal output from the audio output device to be lower than a volume level of a third sound based on a third audio signal output from the audio output device.

[0017] In addition, while displaying the game video on the display, the signal processing device can be configured to control the volume level of the first sound based on the first audio signal output from the audio output device to be greater than the volume level of the third sound based on the third audio signal output from the audio output device.

[0018] According to another embodiment of the present disclosure, an image display device includes: a display; an audio output device configured to output sound; an interface configured to exchange data with an external sound output device; and a signal processing device, which, in a simultaneous sound output mode of the sound output device and the audio output device, is configured to calculate an output gain based on output power information or additional offset information of the sound output device, and output a first audio signal based on the calculated output gain to the audio output device, and output a second audio signal to the sound output device.

[0019] Furthermore, the interface may be configured to receive output power information or additional offset information from the sound output device, wherein in the simultaneous sound output mode, the signal processing device may be configured to calculate the output gain of the first audio signal based on the output power information or the additional offset information.

[0020] Furthermore, in the simultaneous sound output mode, the signal processing device may be configured to calculate an output gain of the first audio signal based on volume setting information of the audio output device and output power information or additional offset information of the sound output device.

[0021] Furthermore, in the simultaneous sound output mode, the signal processing device may be configured to calculate an output gain of the first audio signal based on volume setting information of the audio output device, sound mode information, and output power information or additional offset information of the sound output device.

[0022] Furthermore, as the level of volume setting information of the audio output device increases, or the level of output power information decreases, or the level of additional offset information increases, the signal processing device may be configured to increase the output gain of the first audio signal.

[0023] According to another embodiment of the present disclosure, an image display device includes: a display; an audio output device configured to output sound; an interface configured to exchange data with an external sound output device; and a signal processing device, which is configured to output a first audio signal to the audio output device and a second audio signal to the sound output device in a simultaneous sound output mode of the sound output device and the audio output device, wherein the interface is configured to: after the sound output device is turned on, receive output power information or additional offset information from the sound output device through a first transmission line; and in the simultaneous sound output mode, send the second audio signal to the sound output device through a second transmission line.

[0024] Furthermore, the interface may be configured to receive output power information or additional offset information from the sound output device, wherein in the simultaneous sound output mode, the signal processing device may be configured to calculate the output gain of the first audio signal based on the output power information or the additional offset information.

[0025] Furthermore, in the simultaneous sound output mode, the signal processing device may be configured to calculate an output gain of the first audio signal based on volume setting information of the audio output device and output power information or additional offset information of the sound output device.

[0026] Furthermore, in the simultaneous sound output mode, the signal processing device may be configured to calculate an output gain of the first audio signal based on volume setting information of the audio output device, sound mode information, and output power information or additional offset information of the sound output device.

[0027] Technical Effects

[0028] According to an embodiment of the present disclosure, an image display device includes: a display; an audio output device configured to output sound; an interface configured to exchange data with an external sound output device; and a signal processing device, which is configured to output a first audio signal to the audio output device and a second audio signal to the sound output device in a simultaneous sound output mode of the sound output device and the audio output device, and is configured to output a third audio signal to the audio output device in a single sound output mode of the audio output device, wherein the volume level of the first sound output from the audio output device based on the first audio signal is different from the volume level of the third sound output from the audio output device based on the third audio signal. Therefore, the sense of difference can be reduced when the sound output device and the image display device output sound at the same time. In addition, when only the image display device outputs sound, a stable sound can be output.

[0029] In addition, in the simultaneous sound output mode, the signal processing device can be configured to calculate the output gain of the first audio signal based on the output power information or additional offset information of the sound output device. Therefore, the sense of difference can be reduced when the sound output device and the image display device output sound at the same time.

[0030] In addition, the interface can be configured to receive output power information or additional offset information from the sound output device, wherein in the simultaneous sound output mode, the signal processing device can be configured to calculate the output gain of the first audio signal based on the output power information or the additional offset information. Therefore, the sense of difference can be reduced when the sound output device and the image display device output sound at the same time.

[0031] In addition, in the simultaneous sound output mode, the signal processing device can be configured to calculate the output gain of the first audio signal based on the volume setting information of the audio output device and the output power information or additional offset information of the sound output device. Therefore, the sense of difference can be reduced when the sound output device and the image display device output sound at the same time.

[0032] In addition, in the simultaneous sound output mode, the signal processing device can be configured to calculate the output gain of the first audio signal based on the volume setting information of the audio output device, the sound mode information, and the output power information or additional offset information of the sound output device. Therefore, the sense of difference can be reduced when the sound output device and the image display device output sound at the same time.

[0033] As the level of the volume setting information of the audio output device increases, or the level of the output power information decreases, or the level of the additional offset information increases, the signal processing device can be configured to increase the output gain of the first audio signal. Therefore, the sense of difference can be reduced when the sound output device and the image display device output sound at the same time.

[0034] In addition, after the sound output device is turned on, the interface can be configured to receive output power information or additional offset information of the sound output device through the first transmission line, wherein in the simultaneous sound output mode, the interface can be configured to send a second audio signal to the sound output device through the second transmission line. Therefore, the sense of difference can be reduced when the sound output device and the image display device output sound at the same time.

[0035] In addition, when the sound output device is turned off during operation in the simultaneous sound output mode, the signal processing device can be configured to switch to a single sound output mode in which only the audio output device outputs sound. Therefore, it is possible to quickly switch from the simultaneous sound output mode to the single sound output mode.

[0036] In addition, when the broadcast video is displayed on the display, the signal processing device can be configured to control the volume level of the first sound based on the first audio signal output from the audio output device to be lower than the volume level of the third sound based on the third audio signal output from the audio output device. Therefore, the sense of difference can be reduced when the sound output device and the image display device output sounds at the same time, and the sound suitable for the broadcast video can be output in the mono output mode.

[0037] In addition, when the game video is displayed on the display, the signal processing device can be configured to control the volume level of the first sound based on the first audio signal output from the audio output device to be greater than the volume level of the third sound based on the third audio signal output from the audio output device. Therefore, the sense of difference can be reduced when the sound output device and the image display device output sounds at the same time, and the sound suitable for the game video can be output in the single sound output mode.

[0038] According to another embodiment of the present disclosure, an image display device includes: a display; an audio output device configured to output sound; an interface configured to exchange data with an external sound output device; and a signal processing device, which, in a simultaneous sound output mode of the sound output device and the audio output device, is configured to calculate an output gain based on output power information or additional offset information of the sound output device, and output a first audio signal based on the calculated output gain to the audio output device, and output a second audio signal to the sound output device. Therefore, the sense of difference can be reduced when the sound output device and the image display device output sound simultaneously.

[0039] In addition, the interface can be configured to receive output power information or additional offset information from the sound output device, wherein in the simultaneous sound output mode, the signal processing device can be configured to calculate the output gain of the first audio signal based on the output power information or the additional offset information. Therefore, the sense of difference can be reduced when the sound output device and the image display device output sound at the same time.

[0040] In addition, in the simultaneous sound output mode, the signal processing device can be configured to calculate the output gain of the first audio signal based on the volume setting information of the audio output device and the output power information or additional offset information of the sound output device. Therefore, the sense of difference can be reduced when the sound output device and the image display device output sound at the same time.

[0041] In addition, in the simultaneous sound output mode, the signal processing device can be configured to calculate the output gain of the first audio signal based on the volume setting information of the audio output device, the sound mode information, and the output power information or additional offset information of the sound output device. Therefore, the sense of difference can be reduced when the sound output device and the image display device output sound at the same time.

[0042] In addition, as the level of the volume setting information of the audio output device increases, or the level of the output power information decreases, or the level of the additional offset information increases, the signal processing device can be configured to increase the output gain of the first audio signal. Therefore, the sense of difference can be reduced when the sound output device and the image display device output sound at the same time.

[0043] According to another embodiment of the present disclosure, an image display device includes: a display; an audio output device configured to output sound; an interface configured to exchange data with an external sound output device; and a signal processing device, which is configured to output a first audio signal to the audio output device and a second audio signal to the sound output device in a simultaneous sound output mode of the sound output device and the audio output device, wherein the interface is configured to: after the sound output device is turned on, receive output power information or additional offset information from the sound output device through a first transmission line; and in the simultaneous sound output mode, send the second audio signal to the sound output device through a second transmission line. Therefore, the sense of difference can be reduced when the sound output device and the image display device output sound at the same time.

[0044] In addition, the interface can be configured to receive output power information or additional offset information from the sound output device, wherein in the simultaneous sound output mode, the signal processing device can be configured to calculate the output gain of the first audio signal based on the output power information or the additional offset information. Therefore, the sense of difference can be reduced when the sound output device and the image display device output sound at the same time.

[0045] In addition, in the simultaneous sound output mode, the signal processing device can be configured to calculate the output gain of the first audio signal based on the volume setting information of the audio output device and the output power information or additional offset information of the sound output device. Therefore, the sense of difference can be reduced when the sound output device and the image display device output sound at the same time.

[0046] In addition, in the simultaneous sound output mode, the signal processing device can be configured to calculate the output gain of the first audio signal based on the volume setting information of the audio output device, the sound mode information, and the output power information or additional offset information of the sound output device. Therefore, the sense of difference can be reduced when the sound output device and the image display device output sound at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 is a diagram illustrating an image display system according to an embodiment of the present disclosure;

[0048] Figure 2 yes Figure 1 An example of an internal block diagram of an image display device;

[0049] Figure 3 yes Figure 2 An example of an internal block diagram of a signal processing device;

[0050] Figure 4A is an example of a control Figure 2 A diagram of a method of remote control as shown in ;

[0051] Figure 4B yes Figure 2 The internal block diagram of the remote control shown;

[0052] Figure 5 yes Figure 1 An internal block diagram of a sound output device;

[0053] Figure 6 is an example of an internal block diagram illustrating an image display device according to an embodiment of the present disclosure;

[0054] 7A to 7F is Figure 6 Figures involved in the description;

[0055] Fig. 8A is a flowchart illustrating an operation method of an image display device according to an embodiment of the present disclosure; and

[0056] Figure 8B is a flowchart illustrating an operating method of an image display device according to another embodiment of the present disclosure; and

[0057] FIG. 9A to FIG. 11B is Fig. 8A and Figure 8B The figures involved in the description. DETAILED DESCRIPTION

[0058] Hereinafter, the present disclosure will be described in more detail with reference to the accompanying drawings.

[0059] Regarding the constituent elements used in the following description, the suffixes "module" and "unit" are given only for the convenience of preparing the specification, and do not have or serve as different meanings. Therefore, the suffixes "module" and "unit" can be used interchangeably.

[0060] Figure 1 is a diagram illustrating an image display system according to an embodiment of the present disclosure.

[0061] 1 , an image display system 10 according to an embodiment of the present disclosure may include an image display apparatus 100 including a sound output device 400 and a display 180 .

[0062] The image display system 10 may include a set-top box 300 , a sound output device 400 , and a server 600 .

[0063] The image display apparatus 100 according to an embodiment of the present disclosure may receive an image from the set-top box 300 or the server 600 .

[0064] For example, the image display apparatus 100 may receive an image signal from the set-top box 300 through an HDMI terminal.

[0065] In another example, the image display device 100 can be connected to the network terminal or the network interface 135 (see Figure 2 ) receives an image signal from the server 600.

[0066] In yet another example, the image display device 100 may be configured to receive an external tuner through the internal tuner device 110 (see Figure 2 ) to receive broadcast signals.

[0067] In addition, the image display device 100 according to the embodiment of the present disclosure may include: a display 180; an audio output device 185 (see Figure 2 ), which is configured to output sound; interface 130a (see Figure 6 ), which is configured to exchange data with the external sound output device 400; and the signal processing device 170, which is configured to output a first audio signal to the audio output device 185 and output a second audio signal to the sound output device 400 in a simultaneous sound output mode in which the sound output device 400 and the audio output device 185 simultaneously output sounds. Therefore, the sense of difference can be reduced in the case where the sound output device 400 and the image display device 100 simultaneously output sounds.

[0068] In addition, in the mono output mode in which only the audio output device 185 outputs sound, the signal processing device 170 in the image display device 100 according to the embodiment of the present disclosure may perform control to output a third audio signal to the audio output device 185. Therefore, in the case in which only the image display device 100 outputs sound, a stable sound may be output.

[0069] In addition, the display 180 may be implemented with any of various panels. For example, the display 180 may be any of a liquid crystal display (LCD) panel, an organic light emitting diode (OLED) panel, an inorganic light emitting diode (LED) panel, and the like.

[0070] also, Figure 1 The illustrated image display apparatus 100 may be a TV, a monitor, a tablet PC, a mobile device, or the like.

[0071] Figure 2 yes Figure 1 The image shown is a block diagram of a display device.

[0072] Reference Figure 2 The image display apparatus 100 according to an embodiment of the present disclosure may include an image receiver 105 , an external device interface 130 , a memory 140 , a user input interface 150 , a sensor device, a signal processing device 170 , a display 180 , and an audio output device 185 .

[0073] The image receiver 105 may include a tuner device 110 , a demodulator 120 , a network interface 135 , and an external device interface 130 .

[0074] and Figure 2 Differently, the image receiver 105 may include only the tuner device 110, the demodulator 120, and the external device interface 130. That is, the image receiver 105 may not include the network interface 135.

[0075] The tuner device 110 selects a RF broadcast signal corresponding to a channel selected by a user or an RF broadcast signal corresponding to each pre-stored channel from among a plurality of radio frequency (RF) broadcast signals received through an antenna (not shown). In addition, the tuner device 110 down-converts the selected RF broadcast signal into an intermediate frequency (IF) signal or a baseband audio / video (A / V) signal.

[0076] For example, if the selected RF broadcast signal is a digital broadcast signal, the tuner device 110 down-converts the selected RF broadcast signal into a digital IF signal. On the other hand, if the selected RF broadcast signal is an analog broadcast signal, the tuner device 110 down-converts the selected RF broadcast signal into an analog baseband A / V signal (CVBS / SIF). That is, the tuner device 110 can process a digital broadcast signal or an analog broadcast signal. The analog baseband A / V signal CVBS / SIF from the tuner device 110 can be directly provided to the signal processing device 170.

[0077] Furthermore, the tuner device 110 may include a plurality of tuners for receiving broadcast signals of a plurality of channels, or a single tuner for simultaneously receiving broadcast signals of a plurality of channels.

[0078] The demodulator 120 receives the digital IF signal from the tuner device 110 and demodulates the digital IF signal.

[0079] The demodulator 120 may perform demodulation and channel decoding on the digital IF signal, thereby obtaining a stream signal TS. The stream signal TS may be a signal in which an image signal, an audio signal, and / or a data signal are multiplexed.

[0080] The stream signal output from the demodulator 120 may be input to the signal processing device 170 and then be demultiplexed and A / V signal processed. The signal processing device 170 outputs the processed video and audio signals to the display 180 and the audio output device 185, respectively.

[0081] The external device interface 130 can send data to an external device (not shown) connected thereto (such as a set-top box) and receive data from an external device (not shown) connected thereto (such as a set-top box). For this purpose, the external device interface 130 may include an A / V input / output (I / O) device (not shown).

[0082] The external device interface 130 may be wirelessly or wiredly connected to an external device such as a digital versatile disc (DVD) player, a Blu-ray disc (BD) player, a game console, a camera, a camcorder, a computer (e.g., a laptop), or a set-top box. The external device interface 130 may then transmit and receive signals to and from the external device.

[0083] The A / V input and output device may receive audio and image signals from an external device, and the wireless communicator (not shown) may perform short-range wireless communication with another electronic device.

[0084] The external device interface 130 may exchange data with the nearby mobile terminal 600 through a wireless communicator (not shown). Specifically, the external device interface 130 may receive device information, executed application information, application images, etc. from the mobile terminal 600 in a mirroring mode.

[0085] The network interface 135 serves as an interface between the image display device 100 and a wired / wireless network such as the Internet. For example, the network interface 135 may receive content or data from the Internet or from a content provider (CP) or a network provider (NP) via a network.

[0086] Additionally, network interface 135 may include a wireless communicator (not shown).

[0087] The memory 140 may store programs required for the signal processing device 170 to process signals and control, and may also store signal-processed image, audio, or data signals.

[0088] In addition, the memory 140 may also temporarily store audio, video or data signals received from the external device interface 130. The memory 140 may store information on broadcast channels through a channel adding function.

[0089] Although Figure 2 The memory 140 shown in FIG. 1 is configured to be separate from the signal processing device 170 , but the present disclosure is not limited thereto, and the memory 140 may be incorporated in the signal processing device 170 .

[0090] The user input interface 150 transmits a signal received from a user to the signal processing device 170 , or transmits a signal received from the signal processing device 170 to the user.

[0091] For example, the user input interface 150 can send / receive user input signals to / from the remote controller 200, such as a power on / off signal, a channel selection signal, a screen setting signal, etc., can provide the signal processing device 170 with user input signals received from local keys (not shown), such as inputs of a power key, a channel key, a volume key, a setting value, etc., can send user input signals sensed from a sensor device to the signal processing device 170, or can send signals received from the signal processing device 170 to the sensor device.

[0092] The signal processing device 170 may demultiplex a stream signal received from the tuner device 110 , the demodulator 120 , the network interface 135 , or the external device interface 130 into a plurality of signals and process the demultiplexed signals into audio and image signals.

[0093] For example, the signal processing device 170 may receive a broadcast signal or an HDMI signal received by the image receiver 105 , and output a processed image signal by processing the received broadcast signal or the received HDMI signal.

[0094] The image signal processed by the signal processing device 170 may be displayed as an image corresponding to the image signal on the display 180. The image signal processed by the signal processing device 170 may also be transmitted to an external output device through the external device interface 130.

[0095] The audio signal processed by the signal processing device 170 may be output to the audio output device 185. In addition, the audio signal processed by the signal processing device 170 may be transmitted to an external output device through the external device interface 130.

[0096] Although Figure 2 , but the signal processing device 170 may include Figure 3 That is, the signal processing device 170 can process various types of signals and thus can be implemented in the form of a system on a chip (SOC). Figure 3 A more detailed description is given.

[0097] In addition, the signal processing device 170 may provide overall control of the image display apparatus 100. For example, the signal processing device 170 may control the tuner device 110 to select an RF broadcast signal corresponding to a user-selected channel or a pre-stored channel.

[0098] The signal processing device 170 may control the image display apparatus 100 according to a user command received through the user input interface 150 or according to an internal program.

[0099] The signal processing device 170 may control the display 180 to display an image. The image displayed on the display 180 may be a two-dimensional (2D) or three-dimensional (3D) still image or video.

[0100] The signal processing device 170 may control a specific 2D object in an image displayed on the display 180. For example, the specific 2D object may be at least one of a link web page (e.g., from a newspaper or magazine), an electronic program guide (EPG), a menu, a widget, an icon, a still image, a video, or a text.

[0101] The signal processing device 170 can locate the user based on the image captured by the camera device (not shown). For example, the signal processing device 170 can determine the distance (z-axis coordinate) between the user and the image display device 100. In addition, the signal processing device 170 can determine the x-axis and y-axis coordinates corresponding to the position of the user on the display 180.

[0102] The display 180 generates a driving signal by converting a processed image signal, a processed data signal, an on screen display (OSD) signal, and a control signal received from the signal processing device 170 or an image signal, a data signal, and a control signal received from the external device interface 130 .

[0103] Furthermore, the display 180 may also be a touch screen, which may be used not only as an output device but also as an input device.

[0104] The audio output device 185 may receive the processed audio signal from the signal processing device 170 and output the received audio signal as voice.

[0105] A camera device (not shown) captures the user. The camera device may include, but is not limited to, a single camera. When necessary, the camera device may include multiple cameras. Image information captured by the camera device may be provided to the signal processing device 170.

[0106] The signal processing device 170 may sense the user's gesture based on a captured image received from a camera device (not shown) or a signal received from a sensor device, alone or in combination.

[0107] The power supply 190 supplies power to the entire image display apparatus 100. Specifically, the power supply 190 may supply power to the signal processing device 170 which may be implemented as a system on chip (SOC), the display 180 for displaying an image, the audio output device 185 for outputting an audio signal, and the like.

[0108] Specifically, the power supply 190 may include a converter for converting alternating current (AC) power into direct current (DC) power, and a DC / DC converter for converting the level of DC power.

[0109] The remote controller 200 transmits the user input to the user input interface 150. For the transmission of the user input, the remote controller 200 may operate based on various communication standards such as Bluetooth, RF communication, IR communication, ultra-wideband (UWB), and ZigBee. In addition, the remote controller 200 may receive an image signal, an audio signal, and / or a data signal from the user input interface 150, and output the received signal as an image or sound.

[0110] The above-mentioned image display device 100 may be a fixed or mobile digital broadcast receiver.

[0111] also, Figure 2 The block diagram of the image display device 100 shown is a block diagram of an embodiment of the present disclosure. According to the specifications of the image display device 100 actually implemented, each component of the block diagram can be integrated, added or omitted. That is, two or more components can be combined into a single component as needed, or a single component can be divided into two or more components. The functions performed in each block are described for the purpose of illustrating the embodiments of the present disclosure, and the specific operations and devices do not limit the scope of the present disclosure.

[0112] Figure 3 yes Figure 2 A block diagram of a signal processing device is shown.

[0113] Reference Figure 3 , the signal processing device 170 may include a DEMUX 310, an image processor 320, a processor 330, and an audio processor 370. The signal processing device 170 may further include a data processor (not shown).

[0114] The DEMUX 310 demultiplexes the input stream. For example, the DEMUX 310 may demultiplex an MPEG-2TS into an image signal, an audio signal, and a data signal. The input stream signal may be received from the tuner device 110, the demodulator 120, or the external device interface 130.

[0115] The image processor 320 may perform signal processing based on the received image. For example, the image processor 320 may perform image processing based on the image signal demultiplexed by the DEMUX 310.

[0116] To this end, the image processor 320 may include a video decoder 325, a scaler 335, an image quality processor 635, a video encoder (not shown), an OSD processor 340, a frame rate converter (FRC) 350, a formatter 360, and the like.

[0117] The video decoder 325 decodes the demultiplexed image signal, and the scaler 335 scales the resolution of the decoded image signal so that the image signal can be displayed on the display 180 .

[0118] The video decoder 325 may be provided with decoders operating in accordance with various standards. For example, the video decoder 325 may include, for example, an MPEG-2 decoder, an H.264 decoder, a 3D video decoder for color images, depth images, a decoder for multi-view images, and the like.

[0119] The scaler 335 may scale the received image signal decoded by the video decoder 325 .

[0120] For example, when the size or resolution of the received image signal is small and low, the scaler 335 may upscale the received image signal. When the size or resolution of the received image signal is large and high, the scaler 335 may downscale the received image signal.

[0121] The image quality processor 635 may perform image quality processing based on the received image signal decoded by the video decoder 325 .

[0122] For example, the image quality processor 635 can reduce the noise of the received image signal, expand the resolution of the grayscale of the received image signal, enhance the image resolution, perform signal processing based on high dynamic range (HDR), change the frame rate, or perform image quality processing corresponding to the panel characteristics.

[0123] The OSD processor 340 generates an OSD signal autonomously or according to a user input. For example, the OSD processor 340 may generate a signal for displaying various information as graphics or text on the display 180 according to a user input signal. The OSD signal may include various data such as a user interface (UI), various menus, widgets, and icons. The generated OSD signal may include a 2D or 3D object.

[0124] In addition, the OSD processor 340 may generate a pointer to be displayed on the display 180 based on the pointing signal received from the remote controller 200. In particular, the pointer may be generated by a pointing signal processing device (not shown) which may be provided in the OSD processor 340. Obviously, the pointing signal processing device may be constructed separately from the OSD processor 240.

[0125] The FRC 350 may change the frame rate of a received image signal, or simply output the image signal without frame rate conversion.

[0126] The formatter 360 may change the format of the received image signal into an image signal to be displayed on a display.

[0127] Specifically, the formatter 360 may change the format of the received image signal to correspond to the characteristics of the display panel.

[0128] In addition, the formatter 360 may change the format of the image signal. For example, the formatter 360 may change the format of the 3D image signal into 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 checkerboard format.

[0129] The processor 330 may control overall operations in the image display apparatus 100 or the signal processing device 170 .

[0130] For example, the processor 330 may control the tuner device 110 to tune to an RF broadcast signal corresponding to a user-selected channel or a pre-stored channel.

[0131] The processor 330 may control the image display apparatus 100 according to a user command received through the user input interface 150 or according to an internal program.

[0132] In addition, the processor 330 may control data transmission through the network interface 135 or the external device interface 130 .

[0133] In addition, the processor 330 may control operations of the DEMUX 310 and the image processor 320 in the signal processing device 170 .

[0134] The audio processor 370 of the signal processing device 170 may process the demultiplexed audio signal. For audio signal processing, the audio processor 370 may have a plurality of decoders.

[0135] The audio processor 370 of the signal processing device 170 may also adjust the bass, treble, and volume of the audio signal.

[0136] The data processor (not shown) of the signal processing device 170 may process the data signal obtained by demultiplexing the input stream signal. For example, if the demultiplexed data signal is an encoded data signal, the data processor may decode the encoded data signal. The encoded data signal may be an EPG including broadcast information specifying the start time, end time, etc. of the scheduled broadcast program of each channel.

[0137] also, Figure 3The block diagram of the signal processing device 170 shown is only an example. Depending on the detailed description of the signal processing device 170 in actual implementation, the components of the signal processing device 170 may be combined or omitted, or new components may be added.

[0138] Specifically, the FRC 350 and the formatter 360 may be provided separately from the image processor 320 .

[0139] Figure 4A is an example of a control Figure 2 FIG. 10 shows a method of using a remote controller.

[0140] Figure 4A (a) illustrates a pointer 205 representing the movement of the remote controller 200 displayed on the display 180 .

[0141] Users can move up, down, left, and right ( Figure 4A (b)) and before and after ( Figure 4A (c)) moves or rotates the remote controller 200. The pointer 205 displayed on the display 180 corresponds to the movement of the remote controller 200. Since the pointer 205 moves according to the movement of the remote controller 200 in the 3D space, the remote controller 200 may be referred to as the remote controller 200 or a 3D pointing device.

[0142] Reference Figure 4A In (b), if the user moves the remote controller 200 to the left, the pointer 205 moves to the left on the display 180.

[0143] The sensor of the remote controller 200 detects the movement of the remote controller 200 and transmits motion information corresponding to the detection result to the image display device. Then, the image display device can calculate the coordinates of the pointer 205 based on the motion information of the remote controller 200. Then, the image display device displays the pointer 205 at the calculated coordinates.

[0144] Reference Figure 4A (c), while pressing a predetermined button of the remote controller 200, the user moves the remote controller 200 away from the display 180. Then, the selected area corresponding to the pointer 205 may be enlarged and expanded on the display 180. On the contrary, if the user moves the remote controller 200 toward the display 180, the selected area corresponding to the pointer 205 is reduced and thus shrunk on the display 180. On the other hand, when the remote controller 200 is moved away from the display 180, the selected area may be reduced, and when the remote controller 200 approaches the display 180, the selected area may be enlarged.

[0145] In the case where a predetermined button is pressed in the remote controller 200, the up, down, left, and right movements of the remote controller 200 may be ignored. That is, when the remote controller 200 moves away from the display 180 or approaches the display 180, only the front and rear movements of the remote controller 200 are sensed, and the up, down, left, and right movements of the remote controller 200 are ignored. Unless a predetermined button is pressed in the remote controller 200, the pointer 205 moves according to the up, down, left, or right movement of the remote controller 200.

[0146] The speed and direction of the pointer 205 may correspond to the speed and direction of the remote controller 200 .

[0147] Figure 4B yes Figure 2 Block diagram of the remote control shown in .

[0148] Reference Figure 4B , remote controller 200 may include a wireless communicator 425 , a user input device 435 , a sensor device 440 , an output device 450 , a power supply 460 , a memory 470 , and a controller 480 .

[0149] The wireless communicator 425 sends a signal to and / or receives a signal from one of the image display devices according to an embodiment of the present disclosure. One of the image display devices according to an embodiment of the present disclosure (ie, the image display device 100) will be taken as an example.

[0150] In this embodiment, the remote controller 200 may include an RF module 421 for transmitting RF signals to the image display device 100 and / or receiving RF signals from the image display device 100 according to the RF communication standard. In addition, the remote controller 200 may include an IR module 423 for transmitting IR signals to the image display device 100 and / or receiving IR signals from the image display device 100 according to the IR communication standard.

[0151] In this embodiment, the remote controller 200 may transmit a signal carrying information about the movement of the remote controller 200 to the image display apparatus 100 through the RF module 421 .

[0152] In addition, the remote controller 200 may receive a signal from the image display device 100 through the RF module 421. The remote controller 200 may send a command such as a power on / off command, a channel switching command, or a volume change command to the image display device 100 through the IR module 423 as needed.

[0153] The user input device 435 may include a keyboard, a plurality of buttons, a touch pad, or a touch screen. The user may input commands to the image display device 100 by manipulating the user input device 435. If the user input device 435 includes a plurality of hard key buttons, the user may input various commands to the image display device 100 by pressing the hard key buttons. If the user input device 435 includes a touch screen displaying a plurality of soft keys, the user may input various commands to the image display device 100 by touching the soft keys. The user input device 435 may also include various input tools other than those mentioned herein, such as a scroll key and / or a jog key, and the user input device 435 should not be interpreted as limiting the present disclosure.

[0154] The sensor device 440 may include a gyro sensor 441 and / or an acceleration sensor 443. The gyro sensor 441 may sense the motion of the remote controller 200.

[0155] For example, the gyro sensor 441 may sense motion information of the remote controller 200 in the X, Y, and Z axis directions. The acceleration sensor 443 may sense the moving speed of the remote controller 200. The sensor device 440 may further include a distance sensor for sensing the distance between the remote controller 200 and the display 180.

[0156] The output device 450 may output a video and / or audio signal corresponding to the operation of the user input device 435, or a signal transmitted by the image display apparatus 100. The user may easily recognize whether the user input device 435 has been manipulated, or whether the image display apparatus 100 has been controlled, based on the video and / or audio signal output from the output device 450.

[0157] For example, output device 450 may include: LED module 451, which turns on or off whenever user input device 435 is manipulated or whenever a signal is received from or sent to image display device 100 through wireless communicator 425; vibration module 453, which generates vibration; audio output module 455, which outputs audio data; or display module 457, which outputs an image.

[0158] The power supply 460 supplies power to the remote controller 200. If the remote controller 200 remains stationary for a predetermined time or longer, the power supply 460 may, for example, cut off the power supply to the remote controller 200 to save power. If a specific key on the remote controller 200 is manipulated, the power supply 460 may resume the power supply.

[0159] The memory 470 may store various programs and application data for controlling or operating the remote controller 200. The remote controller 200 may wirelessly transmit and / or receive signals to and / or from the image display device 100 in a predetermined frequency band through the RF module 421. The controller 480 of the remote controller 200 may store information about a frequency band used by the remote controller 200 to wirelessly transmit and / or receive signals to and / or from the paired image display device 100 in the memory 470, and may then refer to this information for later use.

[0160] Controller 480 performs overall control of remote controller 200. For example, controller 480 may transmit a signal corresponding to a key operation detected from user input device 435 or a signal corresponding to a movement of remote controller 200 as sensed by sensor device 440 to image display apparatus 100 through wireless communicator 425.

[0161] The user input interface 150 of the image display device 100 may include: a wireless communication module 411, which wirelessly sends signals to the remote control 200 and / or wirelessly receives signals from the remote control 200; and a coordinate calculator 415, which calculates the coordinates of the position of the remote control 200 on the display screen to be moved according to the movement of the remote control 200.

[0162] The user input interface 150 may wirelessly transmit and / or receive RF signals to and / or from the remote controller 200 through the RF module 412. In addition, the user input interface 150 may wirelessly receive IR signals from the remote controller 200 through the IR module 413 according to the IR communication standard.

[0163] The coordinate calculator 415 may receive motion information about the movement of the remote controller 200 through the wireless communication module 411, and calculate coordinates (x, y) representing the position of the pointer 205 on the screen of the display 180 by correcting the motion information for possible errors or user hand shaking.

[0164] The signal received from the remote controller 200 through the user input interface 150 in the image display device 100 may be transmitted to the signal processing device 170. Then, the signal processing device 170 may acquire information about the movement of the remote controller 200 and information about the key operation detected from the remote controller 200 according to the signal received from the remote controller 200, and may control the image display device 100 based on the acquired information.

[0165] In another example, the remote controller 200 may calculate the coordinates of the position to which the pointer is to be offset corresponding to its movement, and output the coordinates to the user input interface 150 of the image display device 100. In this case, the user input interface 150 may transmit information about the pointer coordinates that are not corrected for possible errors or user hand shaking to the signal processing device 170.

[0166] In yet another example, Figure 4B The configuration of the remote controller 200 shown in FIG. 1 is different, and the coordinate calculator 415 may be provided in the signal processing device 170 instead of the user input interface 150 .

[0167] Figure 5 It is an example Figure 1 Internal block diagram of a sound output device.

[0168] Referring to the drawings, the sound output device 400 may include a sensor 530, a communication device 535, a memory 540, an interface 550, an audio output device 560, a controller 570, an input unit 585, and a power supply 590. When implemented in actual applications, two or more of these components may be combined into a single component as needed, or a single component may be divided into two or more components.

[0169] The sensor 530 may include an inertial sensor (not shown). The inertial sensor may include an acceleration sensor, a gyro sensor, a gravity sensor, etc. For example, the acceleration sensor, the gyro sensor, the gravity sensor, etc. may include a 6-axis sensor.

[0170] The sensor 530 may output motion information of the sound output device 400 , for example, motion information (acceleration information, angular velocity information) or position information about x, y, and z axes, and the like.

[0171] In addition, the sensor 530 may sense temperature information or current information or voltage information of the sound output device.

[0172] In addition, the communication device 535 may provide an interface for communicating with an external device. To this end, the communication device 535 may include a first communication module 353a and a second communication module 353b.

[0173] For example, the first communication module 353a in the communication device 535 may be a wireless communication module and may provide an interface for wireless data communication, such as Bluetooth.

[0174] For example, the second communication module 353 b in the communication device 535 may be a wireless communication module, and may provide an interface for wireless data communication such as Wi-Fi, UWB, and the like.

[0175] The memory 540 may store a program for processing or control by the controller 570 in the sound output device 400 and may also temporarily store input / output data.

[0176] For example, the memory 540 may store output power information or additional offset information of the sound output device 400 .

[0177] The interface 550 may provide an interface for wired data communication, such as HDMI.

[0178] For example, the interface 550 may transmit output power information or additional offset information of the sound output device 400 to the image display apparatus 100 .

[0179] The audio output device 560 may output sound based on the audio signal processed by the controller 570 of the sound output device 400 .

[0180] The controller 570 may control the overall operation of the sound output device 400 by controlling the operation of each unit of the sound output device 400 .

[0181] In addition, the controller 570 may perform signal processing on an audio signal received from an external source.

[0182] In addition, the controller 570 may reproduce an audio signal received from the first communication module 535a or the second communication module 535b.

[0183] In addition, the input unit 585 may include a button for initializing the sound output device 400 or an operation input button, etc.

[0184] Furthermore, the input unit 585 may include a microphone 587 for sound collection.

[0185] In addition, the input unit 585 may include a camera (not shown) for capturing images.

[0186] The power supply 590 may provide power required for the operation of each component under the control of the controller 570 .

[0187] Specifically, the power supply 590 may include a battery (not shown) that stores and outputs direct current.

[0188] Figure 6 is an internal block diagram illustrating an image display device according to an embodiment of the present disclosure.

[0189] 1 , the image display apparatus 100 according to an embodiment of the present disclosure includes a display 180 , an audio output device 185 configured to output sound, an interface 130 a configured to exchange data with an external sound output device 400 , and a signal processing device 170 .

[0190] The interface 130a may be an HDMI interface.

[0191] In addition, the interface 130 a may receive output power information or additional offset information Sd from the sound output device 400 .

[0192] In the simultaneous sound output mode in which the sound output device 400 and the audio output device 185 simultaneously output sound, the signal processing device 170 may perform control to output the first audio signal Stv to the audio output device 185 and to output the second audio signal Sau to the sound output device 400. Therefore, the sense of difference may be reduced in the case where the sound output device 400 and the image display device simultaneously output sound.

[0193] Furthermore, in a single sound output mode in which the audio output device 185 outputs only sound, the signal processing device 170 may perform control to output the third audio signal Stt to the audio output device 185. Therefore, in the case in which only the image display device outputs sound, stable sound may be output.

[0194] In addition, the signal processing device 170 may include: an interface controller 630 configured to control the interface 130a; and a gain calculator 10 configured to calculate the output gain of the audio signal based on the output power information or additional offset information Sd received from the interface 130a or the interface controller 630.

[0195] In addition, in the simultaneous output mode, the gain calculator 610 in the signal processing device 170 can output a first audio signal based on the calculated output gain to the first audio output driver 640, and can output a second audio signal based on the calculated output gain to the second audio output driver 645.

[0196] In addition, in the simultaneous sound output mode, the first audio output driver 640 in the signal processing device 170 can output the first audio signal Sada that has passed through the low-pass filter 642 to the audio output device 185.

[0197] In addition, in the simultaneous sound output mode, the second audio output driver 645 in the signal processing device 170 may output the second audio signal Sadb as a full-band signal to the interface 130a.

[0198] Therefore, in the simultaneous sound output mode, the low-pass filtered first sound may be output from the audio output device 185 , and the second sound as a full-band sound signal may be output from the sound output device 400 .

[0199] In addition, in the mono output mode, the first audio output driver 640 in the signal processing device 170 can output the third audio signal Stt to the audio output device 185 , where the third audio signal Stt is a full-band signal that has not passed through the low-pass filter 642 .

[0200] Therefore, in the monaural output mode, the third sound may be output as a full-band sound signal from the audio output device 185 .

[0201] In addition, the signal processing device 170 may further include an audio driver 607 configured to process an audio signal, a video driver 609 configured to process a video signal, and a gain table 620 .

[0202] In addition, the audio signal Sao processed by the audio driver 607 may be input to the gain calculator 610 .

[0203] In addition, the video signal Svo processed by the video driver 609 may be input to the gain calculator 610 .

[0204] Also, the volume setting information Sv of the audio output device 185 may be input to the gain table 620 , and the gain table 620 may output gain information SVg associated with the volume setting information Sv of the audio output device 185 to the gain calculator 610 .

[0205] Meanwhile, in the simultaneous sound output mode, the gain calculator 610 in the signal processing device 170 may calculate the output gain of the first audio signal Stv based on the output power information or the additional offset information Sd of the sound output device 400 .

[0206] In addition, in the simultaneous output mode, the gain calculator 610 in the signal processing device 170 can calculate the output gain of the first audio signal Stv based on the volume setting information Sv of the audio output device 185 and the output power information or additional offset information Sd of the sound output device 400.

[0207] Specifically, in the simultaneous output mode, the gain calculator 610 in the signal processing device 170 can calculate the output gain of the first audio signal Stv based on the gain information SVg related to the volume setting information Sv of the audio output device 185 and the output power information or additional offset information Sd of the sound output device 400.

[0208] For example, in the simultaneous sound output mode, the gain calculator 610 in the signal processing device 170 may perform control to increase the output gain of the first audio signal Stv as the level of the volume setting information Sv of the audio output device 185 increases, or the level of the output power information decreases, or the level of the additional offset information increases. Therefore, the sense of difference can be reduced in the case where the sound output device 400 and the image display device output sounds at the same time.

[0209] In addition, in the simultaneous sound output mode, the gain calculator 610 in the signal processing device 170 can calculate the output gain of the first audio signal Stv based on the volume setting information Sv of the audio output device 185, the sound mode information, and the output power information or the additional offset information Sd of the sound output device 400. Therefore, the sense of difference can be reduced in the case where the sound output device 400 and the image display device output sounds at the same time.

[0210] Specifically, in the simultaneous output mode, the gain calculator 610 in the signal processing device 170 can calculate the output gain of the first audio signal Stv based on the gain information SVg related to the volume setting information Sv of the audio output device 185, the sound mode information, and the output power information or additional offset information Sd of the sound output device 400.

[0211] For example, in the simultaneous sound output mode, the gain calculator 610 in the signal processing device 170 may perform control to increase the output gain of the first audio signal Stv as the level of the volume setting information Sv of the audio output device 185 increases, or the gain level based on the sound mode information increases, or the level of the output power information decreases, or the level of the additional offset information increases. Therefore, the sense of difference can be reduced in the case where the sound output device 400 and the image display device output sounds at the same time.

[0212] In addition, if the sound output device 400 is turned off during operation in the simultaneous sound output mode, the signal processing device 170 can perform control to switch to the single sound output mode in which only the audio output device 185 outputs sound. Therefore, it is possible to quickly switch from the simultaneous sound output mode to the single sound output mode.

[0213] 7A to 7F is Figure 6 The figures involved in the description.

[0214] first, Fig. 7A and Figure 7B is a diagram illustrating an example of an interface scheme between an image display apparatus and a sound output device.

[0215] Referring to the drawings, the image display apparatus 100 and the sound output device 400 may perform HDMI communication which is a fixed line interface method.

[0216] In the drawing, the HDMI transmitter 132 may be included in the interface 130 a of the image display apparatus 100 , and the HDMI receiver 462 may be included in the interface 550 of the sound output device 400 .

[0217] A plurality of transition minimized differential signaling (TMDS) lines Lna to Lnd, a display data channel (DDC) line Lne, a CEC line LNf, a common line LNg, and an HPD line LNh may be provided between the HDMI transmitter 132 and the HDMI receiver 462 .

[0218] In addition, after the sound output device 400 is turned on, the interface 130a of the image display apparatus 100 may receive the output power information or the additional offset information Sd from the sound output device 400 through the first transmission line LNf.

[0219] That is, the interface 130a of the image display apparatus 100 may receive the output power information or the additional offset information Sd from the sound output device 400 through the CEC line LNf.

[0220] In addition, in the simultaneous sound output mode, the interface 130a of the image display device 100 can transmit the second audio signal Sau to the sound output device 400 through the second transmission line LNa or LNb. Therefore, the difference in the case where the sound output device 400 and the image display device 100 simultaneously output sound can be reduced.

[0221] Figure 7B It is an example Fig. 7A Figure 4 shows the CEC data format of the CEC lines in Figure 4.

[0222] Referring to the drawing, a CEC data format 700 may include a plurality of information bits, EOM, and ACK.

[0223] according to Figure 7B The interface 550 of the sound output device 400 may transmit the output power information of the sound output device 400 or the additional offset information Sd in the CEC data format.

[0224] Figure 7C : is a diagram illustrating an example of adding offset information of a sound output device.

[0225] Referring to the drawings, the sound output devices A, B and C have different output power levels, and based on the different output power levels, their additional offset information may be y1 dB, -y2 dB, -y3 dB, respectively.

[0226] Fig.7D is a diagram illustrating an example of gain levels in the sound mode.

[0227] Referring to the drawings, if the sound mode is a game mode, a standard or broadcast mode, or a music mode, the gain levels may be x1 dB, -x2 dB, and -x3 dB, respectively.

[0228] Fig. 7E is a diagram illustrating an example of a gain level associated with the volume setting information Sv of the audio output device 185, and Figure 7F is a diagram illustrating a graph of gain levels associated with the volume setting information Sv.

[0229] Referring to the drawing, if the volume setting information Sv of the audio output device 185 is at levels 0, 1, 2, 50, and 100, respectively, the gain levels may be -z1 dB, -z2 dB, -z3 dB, -z4 dB, and 0 dB, respectively.

[0230] For example, if the sound output device 400 is A, the sound mode is standard or broadcast mode, and the volume setting information Sv is at level 50, the gain calculator 610 of the signal processing device 170 may calculate the output gain by adding y1 dB, -x2 dB, and -z4 dB.

[0231] In addition, in the simultaneous sound output mode, the signal processing device 170 can perform control so that the sound based on the output gain obtained by adding y1 dB, -x2 dB and -z4 dB can be output from the audio output device 185. Therefore, the sense of difference can be reduced in the case where the sound output device 400 and the image display device simultaneously output sound.

[0232] In another example, if the sound output device 400 is B, the sound mode is standard or broadcast mode, and the volume setting information Sv is at level 50, the gain calculator 610 in the signal processing device 170 can calculate the output gain by adding -y2 dB, -x2dB and -z4 dB.

[0233] In addition, in the simultaneous sound output mode, the signal processing device 170 can perform control so that the sound based on the output gain obtained by adding -y2 dB, -x2 dB and -z4 dB can be output from the audio output device 185. Therefore, the sense of difference can be reduced in the case where the sound output device 400 and the image display device simultaneously output sound.

[0234] That is, even if the sound mode and volume setting information are the same, if the sound output device 400 is changed from A to B, the sound based on the corresponding output gain can be output. Therefore, the difference feeling can be reduced in the case where the sound output device 400 and the image display device output sound at the same time.

[0235] Fig. 8A is a flowchart illustrating an operating method of an image display device according to an embodiment of the present disclosure.

[0236] 1. Referring to the drawings, the signal processing device 170 in the image display apparatus 100 according to the embodiment of the present disclosure determines whether the sound output device 400 and the audio output device 185 are in a simultaneous sound output mode (S820).

[0237] The signal processing device 170 may determine whether the simultaneous output mode is set based on the input signal while displaying the setting screen.

[0238] If the simultaneous sound output mode is set, the signal processing device 170 may calculate an output gain of the audio signal based on the output power information or the additional offset information Sd of the sound output device 400 (S830).

[0239] For example, if the simultaneous output mode is set, the signal processing device 170 may perform control to increase the output gain of the audio signal as the level of the output power information decreases or the level of the additional offset information Sd increases.

[0240] Then, based on the calculated output gain, the signal processing device 170 may output a first audio signal for the audio output device 185 and a second audio signal for the sound output device 400 (S840).

[0241] Then, the audio output device 185 may output a first sound corresponding to the first audio signal (S850). Therefore, the sense of difference may be reduced in the case where the sound output device 400 and the image display apparatus simultaneously output sounds.

[0242] Furthermore, in operation 820 (S820), if the simultaneous sound output mode is not set, the signal processing device 170 determines whether a single sound output mode in which only the audio output device 185 outputs sound is set (S860).

[0243] The signal processing device 170 may determine whether the monaural output mode is set based on the input signal while the setting screen is displayed.

[0244] If the mono output mode is set, the signal processing device 170 may output the third audio signal based on the input signal (S870) while ignoring the output power information or the additional offset information Sd of the sound output device 400.

[0245] In this case, the input signal may include volume setting information of the audio output device 185 .

[0246] That is, in the mono output mode, the signal processing device 170 may calculate an output gain based on volume setting information of the audio output device 185, and may output the third audio signal based on the calculated output gain.

[0247] Alternatively, in the mono output mode, the signal processing device 170 may calculate an output gain based on the sound mode information and the volume setting information of the audio output device 185, and may output a third audio signal based on the calculated output gain.

[0248] Then, the audio output device 185 may output a third sound corresponding to the third audio signal (S880).

[0249] In addition, the volume level of the first sound in operation 850 (S850) is different from the volume level of the third sound in operation 880 (S880). Therefore, in the case where only the image display device outputs the sound, a stable sound can be output.

[0250] Figure 8B is a flowchart illustrating an operating method of an image display device according to another embodiment of the present disclosure.

[0251] Referring to the drawing, when the sound output device 400 is turned on (S805), the interface 550 of the sound output device 400 may transmit output power information or additional offset information Sd of the sound output device 400 (S810).

[0252] In response, the interface 130a in the image display apparatus 100 may receive output power information or additional offset information Sd from the sound output device 400 (S815).

[0253] Then, the signal processing device 170 determines whether the sound output device 400 and the audio output device 185 are in a simultaneous sound output mode (S820).

[0254] The signal processing device 170 may determine whether the simultaneous sound output mode is set while displaying the setting screen.

[0255] If the simultaneous sound output mode is set, the signal processing device 170 may calculate an output gain of the audio signal based on the output power information or the additional offset information Sd of the sound output device 400 (S830).

[0256] Subsequently, the signal processing device 170 may output a first audio signal for the audio output device 185 based on the calculated output gain (S842).

[0257] Next, the signal processing device 170 may output a second audio signal for the sound output device 400 based on the calculated output gain, and the interface 130a in the image display apparatus 100 may transmit the second audio signal (S844).

[0258] In response, the interface 550 of the sound output device 400 may receive the second audio signal (S845), and the audio output device 560 of the sound output device 400 may output a second sound corresponding to the second audio signal (S855).

[0259] In addition, the audio output device 185 of the image display apparatus 100 may output a first sound corresponding to the first audio signal (S850).

[0260] Since the first sound with the adjusted output gain is output from the audio output device 185 of the image display apparatus 100 along with the second sound output from the sound output device 400, the sense of difference can be reduced when the sound output device 400 and the image display apparatus simultaneously output sounds.

[0261] Fig.9A is a diagram illustrating an example of a sound setting screen.

[0262] Referring to the drawing, the signal processing device 170 may perform control to display a sound setting screen 910 based on an input signal of the remote controller 200 or the like.

[0263] The sound setting screen 910 may include a sound mode setting item, an output speaker selection item 915 , a synchronization adjustment item, and the like.

[0264] If the output speaker selection item 915 is selected, the signal processing device 170 may perform control to display an item 920 for simultaneous sound output, an item 925 for single sound output from the image display device, and an item 928 for single sound output from an external sound output device, such as Fig. 9B shown.

[0265] If the item 920 for simultaneous output is selected, the signal processing device 170 may be configured to execute a simultaneous output mode.

[0266] If the item 925 for mono output from the image display device is selected, the signal processing device 170 may be configured to perform a mono output mode in which only the audio output device 185 outputs sound.

[0267] Furthermore, if the item 928 for mono output from the sound output device is selected, the signal processing device 170 may be configured to perform a mono output mode in which only the sound output device outputs sound.

[0268] Fig. 10A 2 is a diagram illustrating an example of receiving output power information or additional offset information from the sound output device 400 .

[0269] Referring to the drawing, after the sound output device 400 is turned on, the signal processing device 170 of the image display apparatus 100 may receive table information 1010a including output power information of a plurality of sound output devices and additional offset information.

[0270] Alternatively, after the sound output device 400 is turned on, the signal processing device 170 of the image display apparatus 100 may receive output power information and additional offset information 1012a of the corresponding sound output device.

[0271] Alternatively, after the sound output device 400 is turned on, the signal processing device 170 of the image display apparatus 100 may receive table information 1010 b including output power information of a plurality of sound output devices.

[0272] Alternatively, after the sound output device 400 is turned on, the signal processing device 170 of the image display apparatus 100 may receive output power information 1012b of the corresponding sound output device.

[0273] Therefore, based on the output power information 1012b of the corresponding sound output device, the signal processing device 170 of the image display apparatus 100 may access the external server 600 or the like to receive additional offset information corresponding to the output power information of the corresponding sound output device.

[0274] Alternatively, after the sound output device 400 is turned on, the signal processing device 170 of the image display apparatus 100 may receive table information 1010c including additional offset information of a plurality of sound output devices.

[0275] Alternatively, after the sound output device 400 is turned on, the signal processing device 170 of the image display apparatus 100 may receive additional offset information 1012c of the corresponding sound output device.

[0276] Fig. 10B is a diagram illustrating an example of the simultaneous output mode.

[0277] 1. Referring to the drawings, while displaying a broadcast video 1005, the signal processing device 170 may calculate an output gain based on output power information or additional offset information of the sound output device 400, and may output a first audio signal Stv based on the calculated output gain.

[0278] Therefore, the audio output device 185 in the image display apparatus 100 outputs the first sound Soa corresponding to the first audio signal.

[0279] Furthermore, the sound output device 400 outputs the second sound Sob based on the second audio signal Sau from the signal processing device 170 .

[0280] Therefore, it is possible to reduce the sense of difference in the case where the sound output device 400 and the image display apparatus simultaneously output sounds.

[0281] Furthermore, in the drawing, an example is illustrated in which the volume level of the first sound Soa is equal to the volume level of the second sound Sob. Therefore, when the image display apparatus 100 and the sound output device 400 simultaneously output sounds, surround sound may be output.

[0282] Fig. 10C is a diagram illustrating an example of a mono output mode in which only the image display device outputs sound.

[0283] Referring to the accompanying drawings, in a monaural output mode in which only the image display device outputs sound while displaying a broadcast video 1005, the signal processing device 170 can calculate an output gain based on volume setting information of the audio output device 185 while ignoring output power information or additional offset information of the sound output device 400, and can output a third audio signal Stt based on the calculated output gain.

[0284] Therefore, the audio output device 185 in the image display apparatus 100 outputs the third sound Soa2 corresponding to the third audio signal Stt.

[0285] Meanwhile, the sound output device 400 does not output sound.

[0286] In addition, in the accompanying drawings, Fig. 10B An example in which the volume level of the second sound Soa2 is greater than the volume level of the first sound Soa or the volume level of the second sound Sob is illustrated in FIG. Therefore, in the case where only the image display device 100 outputs the sound, a stable sound can be output.

[0287] Fig. 10D is a diagram illustrating an example of a monaural output mode in which only the sound output device outputs sound.

[0288] Referring to the drawings, in a mono output mode in which only the sound output device 400 outputs sound while displaying a broadcast video 1005 , the signal processing device 170 may output an audio signal to the sound output device 400 without outputting an audio signal to the audio output device 185 .

[0289] Therefore, the audio output device 185 in the image display apparatus 100 does not output sound, and only the sound output device 400 can output the fourth sound Sob2, which is the only sound output. Therefore, in the case where only the sound output device 400 outputs sound, a stable sound can be output.

[0290] In addition, Fig. 10B and Fig. 10C By comparison, while the broadcast video 1005 is displayed on the display 180, the signal processing device 170 can perform control so that the volume level of the first sound Soa based on the first audio signal Stv output from the audio output device 185 in the simultaneous sound output mode is lower than the volume level of the third sound Soa2 based on the third audio signal Stt output from the audio output device 185 in the single sound output mode. Therefore, the sense of difference can be reduced in the case where the sound output device 400 and the image display device 100 output sounds at the same time, and the sound suitable for the broadcast video 1005 can be output in the single sound output mode.

[0291] Fig.11A is a diagram illustrating another example of a mono output mode in which only an image display device outputs sound.

[0292] Referring to the accompanying drawings, in a monaural output mode in which only the image display device outputs sound while displaying a game video 1105, the signal processing device 170 can calculate an output gain based on volume setting information of the audio output device 185 while ignoring output power information or additional offset information of the sound output device 400, and can output a third audio signal Stt based on the calculated output gain.

[0293] Therefore, the audio output device 185 in the image display apparatus 100 outputs the third sound Soc1 corresponding to the third audio signal Stt. In addition, the sound output device 400 does not output a sound.

[0294] Fig. 11B is a diagram illustrating an example of the simultaneous output mode.

[0295] Referring to the drawings, while displaying a game video 1105 , the signal processing device 170 may calculate an output gain based on output power information or additional offset information of the sound output device 400 , and may output a first audio signal Stv based on the calculated output gain.

[0296] Therefore, the audio output device 185 in the image display apparatus 100 may output the first sound Soc2 corresponding to the first audio signal.

[0297] Furthermore, the sound output device 400 outputs the second sound Soc3 based on the second audio signal Sau from the signal processing device 170 .

[0298] Therefore, it is possible to reduce the sense of difference in the case where the sound output device 400 and the image display apparatus simultaneously output sounds.

[0299] Meanwhile, in the drawing, an example is illustrated in which the volume level of the first sound Soc2 is equal to the volume level of the second sound Soc3. Therefore, when the sound output device 400 and the image display apparatus simultaneously output sounds, surround sound may be output.

[0300] In addition, Fig.11A and Fig. 11B By comparison, while the game video 1105 is displayed on the display 180, the signal processing device 170 can perform control so that the volume level of the first sound Soc2 based on the first audio signal Stv output from the audio output device 185 can be greater than the volume level of the third sound Soc1 based on the third audio signal Stt output from the audio output device 185. Therefore, the sense of difference can be reduced in the case where the sound output device 400 and the image display device output sounds at the same time, and the sound suitable for the game video 1105 in the single sound output mode can be output.

[0301] Obviously, although the preferred embodiments have been illustrated and described above, the present disclosure is not limited to the above specific embodiments, and those skilled in the art may make various modifications and variations without departing from the subject matter of the appended claims. Therefore, it is intended that modifications and variations should not be understood independently of the technical spirit or prospect of the present disclosure.

Claims

1. An image display device, comprising: monitor; an audio output device configured to output sound; an interface configured to exchange data with an external sound output device; as well as a signal processing device, wherein the signal processing device is configured to output a first audio signal to the audio output device and a second audio signal to the audio output device in a simultaneous sound output mode of the sound output device and the audio output device, and the signal processing device is configured to output a third audio signal to the audio output device in a single sound output mode of the audio output device, The volume level of a first sound output from the audio output device based on the first audio signal is different from the volume level of a third sound output from the audio output device based on the third audio signal.

2. The image display device according to claim 1, wherein: In the simultaneous sound output mode, the signal processing device is configured to calculate an output gain of the first audio signal based on output power information or additional offset information of the sound output device.

3. The image display device according to claim 1, wherein: The interface is configured to receive output power information or additional offset information from the sound output device, Wherein, in the simultaneous output mode, the signal processing device is configured to calculate the output gain of the first audio signal based on the output power information or the additional offset information.

4. The image display device according to claim 1, wherein: In the simultaneous sound output mode, the signal processing device is configured to calculate an output gain of the first audio signal based on volume setting information of the audio output device and output power information or additional offset information of the sound output device.

5. The image display device according to claim 1, wherein: In the simultaneous sound output mode, the signal processing device is configured to calculate an output gain of the first audio signal based on volume setting information of the audio output device, sound mode information, and output power information or additional offset information of the sound output device.

6. The image display device according to claim 5, wherein: As the level of the volume setting information of the audio output device increases, or the level of the output power information decreases, or the level of the additional offset information increases, the signal processing device is configured to increase the output gain of the first audio signal.

7. The image display device according to claim 1, wherein: After the sound output device is turned on, the interface is configured to receive output power information or additional offset information of the sound output device through the first transmission line, Wherein, in the simultaneous sound output mode, the interface is configured to send the second audio signal to the sound output device through a second transmission line.

8. The image display device according to claim 1, wherein: In a case where the sound output device is turned off during operation in the simultaneous sound output mode, the signal processing device is configured to switch to a single sound output mode in which only the audio output device outputs sound.

9. The image display device according to claim 1, wherein: When displaying a broadcast video on the display, the signal processing device is configured to control a volume level of the first sound based on the first audio signal output from the audio output device to be lower than a volume level of the third sound based on the third audio signal output from the audio output device.

10. The image display device according to claim 1, wherein: When displaying a game video on the display, the signal processing device is configured to control a volume level of the first sound based on the first audio signal output from the audio output device to be greater than a volume level of the third sound based on the third audio signal output from the audio output device.

11. An image display device, comprising: monitor; an audio output device configured to output sound; an interface configured to exchange data with an external sound output device; as well as A signal processing device, which is configured to calculate an output gain based on output power information or additional offset information of the sound output device in a simultaneous sound output mode of the sound output device and the audio output device, and output a first audio signal based on the calculated output gain to the audio output device and output a second audio signal to the sound output device.

12. The image display device according to claim 11, wherein: The interface is configured to receive the output power information or the additional offset information from the sound output device, Wherein, in the simultaneous output mode, the signal processing device is configured to calculate the output gain of the first audio signal based on the output power information or the additional offset information.

13. The image display device according to claim 11, wherein: In the simultaneous sound output mode, the signal processing device is configured to calculate an output gain of the first audio signal based on volume setting information of the audio output device and the output power information or the additional offset information of the sound output device.

14. The image display device according to claim 11, wherein: In the simultaneous sound output mode, the signal processing device is configured to calculate an output gain of the first audio signal based on volume setting information of the audio output device, sound mode information, and the output power information or the additional offset information of the sound output device.

15. The image display device according to claim 14, wherein: As the level of the volume setting information of the audio output device increases, or the level of the output power information decreases, or the level of the additional offset information increases, the signal processing device is configured to increase the output gain of the first audio signal.

16. An image display device, comprising: monitor; an audio output device configured to output sound; an interface configured to exchange data with an external sound output device; as well as a signal processing device, wherein the signal processing device is configured to output a first audio signal to the audio output device and a second audio signal to the sound output device in a simultaneous sound output mode of the sound output device and the audio output device, Wherein, the interface is configured as follows: After the sound output device is turned on, receiving output power information or additional offset information from the sound output device through a first transmission line; and In the simultaneous sound output mode, the second audio signal is sent to the sound output device through a second transmission line.

17. The image display device according to claim 16, wherein: The interface is configured to receive the output power information or the additional offset information from the sound output device, Wherein, in the simultaneous output mode, the signal processing device is configured to calculate the output gain of the first audio signal based on the output power information or the additional offset information.

18. The image display device according to claim 16, wherein: In the simultaneous sound output mode, the signal processing device is configured to calculate an output gain of the first audio signal based on volume setting information of the audio output device and the output power information or the additional offset information of the sound output device.

19. The image display device according to claim 16, wherein: In the simultaneous sound output mode, the signal processing device is configured to calculate an output gain of the first audio signal based on volume setting information of the audio output device, sound mode information, and the output power information or the additional offset information of the sound output device.

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