Video display device

Abstract

An video display device according to one embodiment of the present disclosure comprises: a display; a communication device for exchanging data with a wireless sound output device; an audio output unit; a signal processing device for outputting an video signal to the display; and a controller for receiving a wake-on signal from the communication device, wherein the communication device outputs the wake-on signal to the controller through a first pin of the communication device when remotely receiving the wake-on signal, and outputs an interrupt signal through the first pin of the communication device in a wireless sound output mode. Therefore, audio sync delay with the wireless sound output device can be reduced.

Description

Video display device

[0001] The present disclosure relates to a video display device, and more particularly, to a video display device capable of reducing audio sync delay with a wireless sound output device.

[0002] A video display device is a device that displays images.

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

[0004] In response to the demand for rich sound listening, the output power of sound output from video display devices is increasing, and furthermore, the use of separate sound output devices is also increasing.

[0005] For example, a method of outputting sound using a wireless sound output device separate from a video display device is being studied.

[0006] Meanwhile, when using a wireless sound output device, audio sync delay between the video display device and the wireless sound output device may be a problem.

[0007] The problem of the present disclosure is to provide a video display device capable of reducing audio sync delay with a wireless sound output device.

[0008] Another object of the present disclosure is to provide a video display device capable of reducing audio sync delay with a wireless sound output device based on an interrupt signal from a communication device.

[0009] Another problem of the present disclosure is to provide a video display device that can be controlled to output stable sound through a wireless sound output device.

[0010] According to one embodiment of the present disclosure for solving the above problem, a video display device includes a display, a communication device for exchanging data with a wireless sound output device, an audio output unit, a signal processing device for outputting a video signal to the display, and a controller for receiving a wake-on signal from the communication device, wherein the communication device, when receiving a remote wake-on signal, outputs a wake-on signal to the controller through a first pin of the communication device, and outputs an interrupt signal through the first pin of the communication device in a wireless sound output mode.

[0011] Meanwhile, the controller transmits a power-on signal to a signal processing device based on the wake-on signal, and the signal processing device can control the display to display a broadcast image or a home screen based on the power-on signal.

[0012] Meanwhile, in the wireless sound output mode, when the communication device receives a request for a timing synchronization function value from the signal processing device, the communication device outputs an interrupt signal, the controller outputs controller timing information based on the interrupt signal, and the signal processing device calculates a second timing synchronization function value based on the controller timing information and the first timing synchronization function value received from the communication device, and outputs a packet including the second timing synchronization function value.

[0013] Meanwhile, the communication device can transmit a packet including a second timing synchronization function value to the wireless sound output device.

[0014] Meanwhile, the signal processing device can receive a first timing synchronization function value corresponding to a timing synchronization function value subsequent to the controller timing information.

[0015] Meanwhile, the controller may output a controller clock in addition to the controller timing information based on the interrupt signal, and the signal processing device may calculate a second timing synchronization function value based on the controller clock, the controller timing information, and the first timing synchronization function value, and output a packet including the second timing synchronization function value.

[0016] Meanwhile, the signal processing device can receive a first timing synchronization function value corresponding to a controller clock and a timing synchronization function value subsequent to the controller timing information.

[0017] Meanwhile, the image display device according to one embodiment of the present disclosure may further include a first register that stores controller timing information.

[0018] Meanwhile, an image display device according to one embodiment of the present disclosure may further include a first register for storing controller timing information and a second register for storing a controller clock.

[0019] Meanwhile, the signal processing device can read out controller timing information from the first register after receiving the first timing synchronization function value.

[0020] Meanwhile, the signal processing device can read out controller timing information from the first register and read out the controller clock from the second register after receiving the first timing synchronization function value.

[0021] Meanwhile, the controller may have a first register and a second register.

[0022] Meanwhile, the signal processing device may have a first register and a second register.

[0023] Meanwhile, the first timing synchronization function value can be generated in a communication device or a wireless sound output device.

[0024] Meanwhile, the signal processing device includes a processor that executes a wireless sound output mode, and the processor can calculate a second timing synchronization function value based on controller timing information and a first timing synchronization function value, and output a packet including the second timing synchronization function value.

[0025] According to another embodiment of the present disclosure, a video display device includes a display, a communication device for exchanging data with a wireless sound output device, an audio output unit, a signal processing device for outputting a video signal to the display, and a controller for transmitting a power-on signal to the signal processing device when powered on, wherein in a wireless sound output mode, when the communication device receives a request for a timing synchronization function value from the signal processing device, the controller outputs controller timing information based on the interrupt signal, and the signal processing device calculates a second timing synchronization function value based on the controller timing information and a first timing synchronization function value received from the communication device, and outputs a packet including the second timing synchronization function value.

[0026] Meanwhile, the communication device can transmit a packet including a second timing synchronization function value to the wireless sound output device.

[0027] Meanwhile, the signal processing device can receive a first timing synchronization function value corresponding to a timing synchronization function value subsequent to the controller timing information.

[0028] Meanwhile, the controller may output a controller clock in addition to the controller timing information based on the interrupt signal, and the signal processing device may calculate a second timing synchronization function value based on the controller clock, the controller timing information, and the first timing synchronization function value, and output a packet including the second timing synchronization function value.

[0029] Meanwhile, the signal processing device can receive a first timing synchronization function value corresponding to a controller clock and a timing synchronization function value subsequent to the controller timing information.

[0030] Meanwhile, when the communication device receives a remote wake-on signal, the communication device can output the wake-on signal to the controller through the first pin of the communication device, and in the wireless sound output mode, output an interrupt signal through the first pin of the communication device.

[0031] Meanwhile, the controller transmits a power-on signal to a signal processing device based on the wake-on signal, and the signal processing device can control the display to display a broadcast image or a home screen based on the power-on signal.

[0032] According to one embodiment of the present disclosure, a video display device includes a display, a communication device for exchanging data with a wireless sound output device, an audio output unit, a signal processing device for outputting a video signal to the display, and a controller for receiving a wake-on signal from the communication device, wherein the communication device, when receiving a remote wake-on signal, outputs the wake-on signal to the controller through a first pin of the communication device, and outputs an interrupt signal through the first pin of the communication device in a wireless sound output mode. Accordingly, an audio sync delay with the wireless sound output device can be reduced. In particular, an audio sync delay with the wireless sound output device can be reduced based on an interrupt signal from the communication device.

[0033] Meanwhile, the controller transmits a power-on signal to the signal processing device based on the wake-on signal, and the signal processing device can control the display to display a broadcast image or home screen based on the power-on signal. Accordingly, audio sync delay with the wireless sound output device can be reduced.

[0034] Meanwhile, in the wireless sound output mode, when the communication device receives a request for a timing synchronization function value from the signal processing device, the communication device outputs an interrupt signal, the controller outputs controller timing information based on the interrupt signal, and the signal processing device calculates a second timing synchronization function value based on the controller timing information and the first timing synchronization function value received from the communication device, and outputs a packet including the second timing synchronization function value. Accordingly, it is possible to reduce an audio sync delay with the wireless sound output device.

[0035] Meanwhile, the communication device can transmit a packet including a second timing synchronization function value to the wireless sound output device. Accordingly, audio sync delay with the wireless sound output device can be reduced.

[0036] Meanwhile, the signal processing device can receive a first timing synchronization function value corresponding to a timing synchronization function value subsequent to the controller timing information. Accordingly, audio sync delay with the wireless sound output device can be reduced.

[0037] Meanwhile, the controller may output a controller clock in addition to the controller timing information based on the interrupt signal, and the signal processing device may calculate a second timing synchronization function value based on the controller clock, the controller timing information, and the first timing synchronization function value, and output a packet including the second timing synchronization function value. Accordingly, it is possible to reduce the audio sync delay with the wireless sound output device.

[0038] Meanwhile, the signal processing device can receive a first timing synchronization function value corresponding to a controller clock and a timing synchronization function value subsequent to the controller timing information. Accordingly, audio sync delay with the wireless sound output device can be reduced.

[0039] Meanwhile, a video display device according to one embodiment of the present disclosure may further include a first register for storing controller timing information. Accordingly, based on the controller timing information, audio sync delay with a wireless sound output device can be reduced.

[0040] Meanwhile, a video display device according to one embodiment of the present disclosure may further include a first register storing controller timing information and a second register storing a controller clock. Accordingly, based on the controller timing information and the controller clock, audio sync delay with a wireless sound output device can be reduced.

[0041] Meanwhile, the signal processing device can read controller timing information from the first register after receiving the first timing synchronization function value. Accordingly, based on the controller timing information, audio sync delay with the wireless sound output device can be reduced.

[0042] Meanwhile, the signal processing device can, after receiving the first timing synchronization function value, read controller timing information from the first register and read the controller clock from the second register. Accordingly, based on the controller timing information and the controller clock, it is possible to reduce audio sync delay with the wireless sound output device.

[0043] Meanwhile, the controller may include a first register and a second register. Accordingly, based on controller timing information and a controller clock, audio sync delay with a wireless sound output device can be reduced.

[0044] Meanwhile, the signal processing device may include a first register and a second register. Accordingly, based on controller timing information and a controller clock, audio sync delay with a wireless sound output device can be reduced.

[0045] Meanwhile, the first timing synchronization function value can be generated by a communication device or a wireless sound output device. Accordingly, audio sync delay with the wireless sound output device can be reduced.

[0046] Meanwhile, the signal processing device includes a processor that executes a wireless sound output mode, and the processor can calculate a second timing synchronization function value based on controller timing information and a first timing synchronization function value, and output a packet including the second timing synchronization function value. Accordingly, audio sync delay with the wireless sound output device can be reduced.

[0047] According to another embodiment of the present disclosure, a video display device includes a display, a communication device for exchanging data with a wireless sound output device, an audio output unit, a signal processing device for outputting a video signal to the display, and a controller for transmitting a power-on signal to the signal processing device when powered on, wherein in a wireless sound output mode, when the communication device receives a request for a timing synchronization function value from the signal processing device, the controller outputs controller timing information based on the interrupt signal, and the signal processing device calculates a second timing synchronization function value based on the controller timing information and a first timing synchronization function value received from the communication device, and outputs a packet including the second timing synchronization function value. Accordingly, an audio sync delay with the wireless sound output device can be reduced. In particular, an audio sync delay with the wireless sound output device can be reduced based on the controller timing information.

[0048] Meanwhile, the communication device can transmit a packet including a second timing synchronization function value to the wireless sound output device. Accordingly, audio sync delay with the wireless sound output device can be reduced.

[0049] Meanwhile, the signal processing device can receive a first timing synchronization function value corresponding to a timing synchronization function value subsequent to the controller timing information. Accordingly, audio sync delay with the wireless sound output device can be reduced.

[0050] Meanwhile, the controller may output a controller clock in addition to the controller timing information based on the interrupt signal, and the signal processing device may calculate a second timing synchronization function value based on the controller clock, the controller timing information, and the first timing synchronization function value, and output a packet including the second timing synchronization function value. Accordingly, based on the controller timing information and the controller clock, it is possible to reduce an audio sync delay with the wireless sound output device.

[0051] Meanwhile, the signal processing device can receive a first timing synchronization function value corresponding to a timing synchronization function value following the controller clock and controller timing information. Accordingly, based on the controller timing information and the controller clock, it is possible to reduce audio sync delay with the wireless sound output device.

[0052] Meanwhile, when the communication device receives a remote wake-on signal, the communication device can output the wake-on signal to the controller through the first pin of the communication device, and in the wireless sound output mode, output an interrupt signal through the first pin of the communication device. Accordingly, the audio sync delay with the wireless sound output device can be reduced. In particular, the audio sync delay with the wireless sound output device can be reduced based on the interrupt signal from the communication device.

[0053] Meanwhile, the controller transmits a power-on signal to the signal processing device based on the wake-on signal, and the signal processing device can control the display to display a broadcast image or home screen based on the power-on signal. Accordingly, audio sync delay with the wireless sound output device can be reduced.

[0054] FIG. 1 is a diagram illustrating a sound output system according to one embodiment of the present disclosure.

[0055] Figure 2 is an example of an internal block diagram of the video display device of Figure 1.

[0056] Figure 3 is an example of an internal block diagram of the signal processing device of Figure 2.

[0057] Fig. 4a is a drawing illustrating a control method of the remote control device of Fig. 2.

[0058] Figure 4b is an internal block diagram of the remote control device of Figure 2.

[0059] Fig. 5 is an example of the wireless sound output device of Fig. 1.

[0060] FIGS. 6A and 6B are drawings for reference in explaining the operation of a video display device related to the present disclosure.

[0061] FIG. 7a is an example of a flowchart showing an operation method of an image display device according to an embodiment of the present disclosure.

[0062] FIG. 7b is another example of a flowchart showing an operating method of an image display device according to an embodiment of the present disclosure.

[0063] Figures 8a to 12 are drawings referenced in the description of Figures 7a to 7b.

[0064] Hereinafter, the present disclosure will be described in more detail with reference to the drawings.

[0065] The suffixes "module" and "part" used in the following description are given solely for the convenience of writing this specification and do not impart any particularly significant meaning or role to the components themselves. Therefore, the terms "module" and "part" may be used interchangeably.

[0066] FIG. 1 is a diagram illustrating a sound output system according to one embodiment of the present disclosure.

[0067] Referring to the drawings, a sound output system (10) according to one embodiment of the present disclosure includes a video display device (100) and at least one wireless sound output device (500a, 500b).

[0068] In the drawing, a sound output system (10) is illustrated as including a video display device (100) and a plurality of wireless sound output devices (500a, 500b).

[0069] An image display device (100) according to one embodiment of the present disclosure includes a display (180) and a remote control device (200).

[0070] Meanwhile, a sound output system (10) according to one embodiment of the present disclosure may further include an access point device (400) providing a wired or wireless network, and a mobile terminal (600) that wirelessly connects to the access point device (400).

[0071] For example, a mobile terminal (600) can wirelessly connect to a video display device (100) via an access point device (400).

[0072] Meanwhile, the mobile terminal (600) can transmit a remote wake-on signal to the video display device (100) via the access point device (400).

[0073] Meanwhile, the image display device (100) according to one embodiment of the present disclosure can be turned on and display a broadcast image or home screen on the display (180) when a remote wake-on signal is received, either wired or wirelessly.

[0074] Meanwhile, the image display device (100) according to one embodiment of the present disclosure can output the sound (SU) of the first channel through the audio output unit (185) within the image display device (100) in the wireless sound output mode, and output the sound (SUa) of the second channel and the sound (SUb) of the third channel from the wireless sound output devices (500a, 500b), respectively.

[0075] At this time, the communication device (165 in FIG. 2) within the image display device (100) according to one embodiment of the present disclosure outputs an interrupt signal in order to reduce audio sync delay with the wireless sound output device (500a, 500b). Accordingly, based on the interrupt signal (Sit), the audio sync delay with the wireless sound output device (500a, 500b) can be reduced.

[0076] Meanwhile, the video display device (100) of FIG. 1 can be a TV, monitor, vehicle display, tablet PC, mobile terminal, etc.

[0077] Figure 2 is an example of an internal block diagram of the video display device of Figure 1.

[0078] Referring to FIG. 2, an image display device (100) according to an embodiment of the present disclosure may include an image receiving unit (105), an external device interface unit (130), a storage unit (140), a user input interface unit (150), a sensor unit (not shown), a signal processing unit (170), a display (180), an audio output unit (185), a communication device (165), and a controller (175).

[0079] The video receiving unit (105) may include a tuner unit (110), a demodulation unit (120), a network interface unit (130), and an external device interface unit (130).

[0080] Meanwhile, unlike the drawing, the video receiving unit (105) may include only a tuner unit (110), a demodulator unit (120), and an external device interface unit (130). That is, it may not include a network interface unit (130).

[0081] The tuner unit (110) selects an RF broadcast signal corresponding to a channel selected by the user or all pre-stored channels among RF (Radio Frequency) broadcast signals received through an antenna (not shown). In addition, it converts the selected RF broadcast signal into an intermediate frequency signal or a baseband video or audio signal.

[0082] For example, if the selected RF broadcast signal is a digital broadcast signal, it is converted into a digital IF signal (DIF), and if it is an analog broadcast signal, it is converted into an analog baseband video or audio signal (CVBS / SIF). That is, the tuner unit (110) can process a digital broadcast signal or an analog broadcast signal. The analog baseband video or audio signal (CVBS / SIF) output from the tuner unit (110) can be directly input to the signal processing device (170).

[0083] Meanwhile, the tuner unit (110) may be equipped with multiple tuners to receive broadcast signals of multiple channels. Alternatively, a single tuner that simultaneously receives broadcast signals of multiple channels is also possible.

[0084] The demodulation unit (120) receives the digital IF signal (DIF) converted from the tuner unit (110) and performs a demodulation operation.

[0085] The demodulator (120) can output a stream signal (TS) after performing demodulation and channel decoding. At this time, the stream signal may be a signal in which a video signal, an audio signal, or a data signal is multiplexed.

[0086] The stream signal output from the demodulator (120) can be input to the signal processing device (170). The signal processing device (170) performs demultiplexing, image / audio signal processing, etc., and then outputs an image to the display (180) and outputs an audio to the audio output device (185).

[0087] The external device interface unit (130) can transmit or receive data to or from a connected external device (not shown), for example, a set-top box (50). To this end, the external device interface unit (130) may include an A / V input / output unit (not shown).

[0088] The external device interface unit (130) can be connected to external devices such as a DVD (Digital Versatile Disk), Blu-ray, game device, camera, camcorder, computer (laptop), set-top box, etc., via wired / wireless connection, and can also perform input / output operations with the external devices.

[0089] The A / V input / output section can receive video and audio signals from external devices.

[0090] The network interface unit (135) provides an interface for connecting the video display device (100) to a wired / wireless network, including the Internet. For example, the network interface unit (135) can receive content or data provided by the Internet, a content provider, or a network operator via a network.

[0091] The storage unit (140) may store programs for each signal processing and control within the signal processing device (170), and may also store signal-processed image, voice, or data signals.

[0092] In addition, the storage unit (140) may also perform a function for temporary storage of video, audio, or data signals input to the external device interface unit (130). In addition, the storage unit (140) may store information regarding a specific broadcast channel through a channel memory function such as a channel map.

[0093] Although the storage unit (140) of FIG. 2 illustrates an embodiment in which the storage unit (140) is provided separately from the signal processing device (170), the scope of the present disclosure is not limited thereto. The storage unit (140) may be included within the signal processing device (170).

[0094] The user input interface unit (150) transmits a signal input by the user to the signal processing device (170) or transmits a signal from the signal processing device (170) to the user.

[0095] For example, a user input signal such as power on / off, channel selection, screen setting, etc. may be transmitted / received from a remote control device (200), a user input signal input from a local key (not shown) such as a power key, a channel key, a volume key, a setting value, etc. may be transmitted to a signal processing device (170), a user input signal input from a sensor unit (not shown) that senses a user's gesture may be transmitted to the signal processing device (170), or a signal from the signal processing device (170) may be transmitted to a sensor unit (not shown).

[0096] Meanwhile, the communication device (165) may provide an interface for communication with an external device. To this end, the communication device (165) may include a first communication module (165a) and a second communication module (165b).

[0097] For example, the first communication module (165a) within the communication device (165) may, as a wireless communication module, provide an interface for wireless data communication such as Bluetooth.

[0098] For example, the second communication module (165b) within the communication device (165) may, as a wireless communication module, provide an interface for wireless data communication such as Wi-Fi or UWB.

[0099] Meanwhile, the communication device (165) can perform short-range wireless communication with other electronic devices.

[0100] For example, the communication device (165) can exchange data with an adjacent access point device (400) or mobile terminal (600). In particular, the communication device (165) can receive device information, running application information, application images, etc. from the mobile terminal (600) in mirroring mode.

[0101] The signal processing device (170) can demultiplex an input stream or process demultiplexed signals through a tuner unit (110), a demodulator unit (120), a network interface unit (135), or an external device interface unit (130) to generate and output a signal for video or audio output.

[0102] For example, the signal processing device (170) can receive a broadcast signal or an HDMI signal received from the image receiving unit (105), perform signal processing based on the received broadcast signal or HDMI signal, and output a signal-processed image signal.

[0103] An image signal processed by a signal processing device (170) may be input to a display (180) and displayed as an image corresponding to the image signal. In addition, an image signal processed by a signal processing device (170) may be input to an external output device through an external device interface unit (130).

[0104] The voice signal processed in the signal processing device (170) can be output as sound to the audio output unit (185). In addition, the voice signal processed in the signal processing device (170) can be input to an external output device through the external device interface unit (130).

[0105] Although not illustrated in FIG. 2, the signal processing device (170) may include a demultiplexing unit, an image processing unit, etc. That is, the signal processing device (170) may perform various signal processing operations and, accordingly, may be implemented in the form of a system on chip (SOC). This will be described later with reference to FIG. 3.

[0106] In addition, the signal processing device (170) can control the overall operation within the video display device (100). For example, the signal processing device (170) can control the tuner unit (110) to select (tune) an RF broadcast corresponding to a channel selected by a user or a pre-stored channel.

[0107] In addition, the signal processing device (170) can control the image display device (100) by a user command or internal program input through the user input interface unit (150).

[0108] Meanwhile, the signal processing device (170) can control the display (180) to display an image. At this time, the image displayed on the display (180) may be a still image or a moving image, and may be a 2D image or a 3D image.

[0109] Meanwhile, the signal processing device (170) can cause a predetermined object to be displayed within an image displayed on the display (180). For example, the object can be at least one of a connected web screen (newspaper, magazine, etc.), an EPG (Electronic Program Guide), various menus, widgets, icons, still images, videos, and text.

[0110] Meanwhile, the signal processing device (170) can recognize the user's location based on an image captured from a camera (not shown). For example, the distance (z-axis coordinate) between the user and the image display device (100) can be determined. In addition, the x-axis coordinate and y-axis coordinate within the display (180) corresponding to the user's location can be determined.

[0111] Meanwhile, when the controller (175) receives a wake-on signal (Swk) from the communication device (165), it can transmit a power-on signal (Spo) to the signal processing device (170) based on the wake-on signal (Swk).

[0112] Meanwhile, the controller (175) can output controller timing information based on an interrupt signal (Sit) in the wireless sound output mode.

[0113] Meanwhile, the controller (175) can output a controller clock in addition to the controller timing information based on the interrupt signal (Sit).

[0114] The display (180) generates a driving signal by converting a video signal, data signal, OSD signal, control signal, etc. processed by the signal processing device (170) or a video signal, data signal, control signal, etc. received from the external device interface unit (130).

[0115] Meanwhile, the display (180) is configured as a touch screen and can be used as an input device in addition to an output device.

[0116] The audio output unit (185) receives a signal processed by the signal processing device (170) and outputs it as voice.

[0117] A camera unit (not shown) photographs a user. The camera unit (not shown) may be implemented with a single camera, but is not limited thereto, and may also be implemented with multiple cameras. Image information captured by the camera unit (not shown) may be input to a signal processing device (170).

[0118] The signal processing device (170) can detect the user's gesture based on an image captured from a shooting unit (not shown) or a signal detected from a sensor unit (not shown), or a combination thereof.

[0119] The power supply unit (190) supplies power to the entire video display device (100).

[0120] In particular, the power supply unit (190) can supply power to a signal processing unit (170) that can be implemented in the form of a system on chip (SOC), a display (180) for displaying images, and an audio output unit (185) for audio output.

[0121] Specifically, the power supply (190) may be equipped with a converter that converts the level of the input voltage.

[0122] For example, the power supply (190) may have an ac / dc converter and a dc / dc converter when the input voltage is an alternating voltage.

[0123] As another example, the power supply (190) may have a dc / dc converter when the input voltage is a direct current voltage.

[0124] The remote control device (200) transmits user input to the user input interface unit (150). To this end, the remote control device (200) may use Bluetooth, RF (Radio Frequency) communication, IR (Infrared) communication, UWB (Ultra Wideband), ZigBee, etc. In addition, the remote control device (200) may receive video, audio, or data signals output from the user input interface unit (150) and display or output the same as audio on the remote control device (200).

[0125] Meanwhile, the above-described video display device (100) may be a digital broadcast receiver capable of receiving fixed or mobile digital broadcasts.

[0126] Meanwhile, the block diagram of the image display device (100) illustrated in FIG. 2 is a block diagram for one embodiment of the present disclosure. Each component of the block diagram may be integrated, added, or omitted depending on the specifications of the image display device (100) actually implemented. That is, two or more components may be combined into one component, or one component may be subdivided into two or more components, as needed. In addition, the functions performed by each block are intended to explain the embodiment of the present disclosure, and the specific operations or devices thereof do not limit the scope of the present disclosure.

[0127] Figure 3 is an example of an internal block diagram of the signal processing device of Figure 2.

[0128] Referring to the drawings, a signal processing device (170) according to an embodiment of the present disclosure may include a demultiplexing unit (310), an image processing unit (320), a processor (330), and an audio processing unit (370). In addition, a data processing unit (not shown) may be further included.

[0129] The demultiplexer (310) demultiplexes the input stream. For example, when MPEG-2 TS is input, it can be demultiplexed to separate it into video, audio, and data signals, respectively. Here, the stream signal input to the demultiplexer (310) may be a stream signal output from the tuner (110), the demodulator (120), or the external device interface (130).

[0130] The image processing unit (320) can perform signal processing on an input image. For example, the image processing unit (320) can perform image processing on an image signal demultiplexed from the demultiplexing unit (310).

[0131] To this end, the image processing unit (320) may include an image decoder (325), a scaler (335), an image quality processing unit (635), an image encoder (not shown), a graphics processing unit (340), a frame rate conversion unit (350), and a formatter (360).

[0132] The video decoder (325) decodes the demultiplexed video signal, and the scaler (335) scales the resolution of the decoded video signal so that it can be output on the display (180).

[0133] The video decoder (325) can be equipped with decoders of various standards. For example, it can be equipped with an MPEG-2, H.264 decoder, a 3D video decoder for color images and depth images, a decoder for multi-view images, etc.

[0134] The scaler (335) can scale an input video signal that has been decoded by a video decoder (325), etc.

[0135] For example, the scaler (335) can upscale when the size or resolution of the input image signal is small, and downscale when the size or resolution of the input image signal is large.

[0136] The image quality processing unit (635) can perform image quality processing on an input image signal for which image decoding has been completed in the image decoder (325), etc.

[0137] For example, the image quality processing unit (635) may perform noise removal processing of an input image signal, expand the resolution of the gradation of an input image signal, perform image resolution enhancement, perform signal processing based on high dynamic range (HDR), vary the frame rate, or perform image quality processing corresponding to panel characteristics, particularly the panel.

[0138] The graphic processing unit (340) generates an OSD signal based on user input or on its own. For example, based on a user input signal, a signal for displaying various information in the form of graphics or text on the screen of the display (180) may be generated. The generated OSD signal may include various data such as the user interface screen of the image display device (100), various menu screens, widgets, and icons. In addition, the generated OSD signal may include a 2D object or a 3D object.

[0139] In addition, the graphic processing unit (340) can generate a pointer that can be displayed on the display based on a pointing signal input from the remote control device (200). In particular, such a pointer can be generated by the pointing signal processing unit, and the graphic processing unit (240) can include such a pointing signal processing unit (not shown). Of course, the pointing signal processing unit (not shown) can also be provided separately rather than being included within the graphic processing unit (240).

[0140] The frame rate converter (FRC) (350) can convert the frame rate of an input video. Meanwhile, the frame rate converter (350) can also output the video as is without a separate frame rate conversion.

[0141] Meanwhile, the formatter (360) can change the format of an input video signal into a video signal for display on a display and output it.

[0142] In particular, the formatter (360) can change the format of the video signal to correspond to the display panel.

[0143] Meanwhile, the formatter (360) can also change the format of the video signal.

[0144] The processor (330) can control the overall operation within the image display device (100) or the signal processing device (170).

[0145] For example, the processor (330) can control the tuner (110) to select (tune) an RF broadcast corresponding to a channel selected by the user or a pre-stored channel.

[0146] In addition, the processor (330) can control the image display device (100) by a user command or internal program input through the user input interface unit (150).

[0147] Additionally, the processor (330) can perform data transmission control with the network interface unit (135) or the external device interface unit (130).

[0148] Additionally, the processor (330) can control the operation of the demultiplexing unit (310), the image processing unit (320), etc., within the signal processing device (170).

[0149] Meanwhile, the audio processing unit (370) within the signal processing device (170) can perform audio processing of the demultiplexed audio signal. For this purpose, the audio processing unit (370) can be equipped with various decoders.

[0150] Additionally, the audio processing unit (370) within the signal processing device (170) can process bass, treble, volume control, etc.

[0151] A data processing unit (not shown) within a signal processing device (170) can perform data processing on a demultiplexed data signal. For example, if the demultiplexed data signal is an encoded data signal, it can be decoded. The encoded data signal may be electronic program guide information (EPG) information that includes broadcast information such as the start time and end time of a broadcast program broadcast on each channel.

[0152] Meanwhile, the block diagram of the signal processing device (170) illustrated in FIG. 3 is a block diagram for one embodiment of the present disclosure. Each component of the block diagram may be integrated, added, or omitted depending on the specifications of the signal processing device (170) actually implemented.

[0153] In particular, the frame rate conversion unit (350) and formatter (360) may be provided separately from the image processing unit (320).

[0154] Meanwhile, a signal processing device (170) according to an embodiment of the present disclosure may further include a neural network processor (333) for learning processing, etc.

[0155] Fig. 4a is a drawing illustrating a control method of the remote control device of Fig. 2.

[0156] As shown in (a) of FIG. 4a, a pointer (205) corresponding to a remote control device (200) is displayed on the display (180).

[0157] The user can move or rotate the remote control device (200) up and down, left and right ((b) of FIG. 4a), and forward and backward ((c) of FIG. 4a). The pointer (205) displayed on the display (180) of the video display device corresponds to the movement of the remote control device (200). As shown in the drawing, the pointer (205) moves and is displayed according to the movement in 3D space, so the remote control device (200) can be called a space remote control or a 3D pointing device.

[0158] Figure 4a (b) illustrates that when a user moves the remote control device (200) to the left, the pointer (205) displayed on the display (180) of the video display device also moves to the left in response.

[0159] Information about the movement of the remote control device (200) detected by the sensor of the remote control device (200) is transmitted to the image display device. The image display device can calculate the coordinates of the pointer (205) from the information about the movement of the remote control device (200). The image display device can display the pointer (205) to correspond to the calculated coordinates.

[0160] FIG. 4A (c) illustrates a case where, while pressing a specific button within the remote control device (200), the user moves the remote control device (200) away from the display (180). As a result, the selection area within the display (180) corresponding to the pointer (205) may be zoomed in and displayed in an enlarged manner. Conversely, when the user moves the remote control device (200) closer to the display (180), the selection area within the display (180) corresponding to the pointer (205) may be zoomed out and displayed in a reduced manner. Meanwhile, when the remote control device (200) moves away from the display (180), the selection area may be zoomed out, and when the remote control device (200) moves closer to the display (180), the selection area may be zoomed in.

[0161] Meanwhile, when a specific button within the remote control device (200) is pressed, recognition of up, down, left, and right movements may be excluded. That is, when the remote control device (200) moves away from or toward the display (180), up, down, left, and right movements may not be recognized, and only forward and backward movements may be recognized. When a specific button within the remote control device (200) is not pressed, only the pointer (205) moves in accordance with the up, down, left, and right movements of the remote control device (200).

[0162] Meanwhile, the movement speed or movement direction of the pointer (205) can correspond to the movement speed or movement direction of the remote control device (200).

[0163] Figure 4b is an internal block diagram of the remote control device of Figure 2.

[0164] Referring to the drawing, the remote control device (200) may include a wireless communication unit (420), a user input unit (430), a sensor unit (440), an output unit (450), a power supply unit (460), a storage unit (470), and a control unit (480).

[0165] Meanwhile, the remote control device (200) includes a microphone (435) for receiving external sound.

[0166] The wireless communication unit (420) transmits and receives signals with any one of the image display devices according to the embodiments of the present disclosure described above. Among the image display devices according to the embodiments of the present disclosure, one image display device (100) will be described as an example.

[0167] In this embodiment, the remote control device (200) may be equipped with an RF module (421) capable of transmitting and receiving signals with the image display device (100) in accordance with RF communication standards. In addition, the remote control device (200) may be equipped with an IR module (423) capable of transmitting and receiving signals with the image display device (100) in accordance with IR communication standards.

[0168] In this embodiment, the remote control device (200) transmits a signal containing information about the movement of the remote control device (200) to the image display device (100) through the RF module (421).

[0169] In addition, the remote control device (200) can receive a signal transmitted by the image display device (100) through the RF module (421). In addition, the remote control device (200) can transmit commands for power on / off, channel change, volume change, etc. to the image display device (100) through the IR module (423) as needed.

[0170] Meanwhile, the RF module (421) may include a first communication module (421a) and a second communication module (421b).

[0171] For example, the first communication module (421a) within the RF module (421) may, as a wireless communication module, provide an interface for wireless data communication such as Bluetooth.

[0172] For example, the second communication module (421b) within the RF module (421) may, as a wireless communication module, provide an interface for wireless data communication such as Wi-Fi or UWB.

[0173] The user input unit (430) may be configured as a keypad, button, touch pad, or touch screen. The user can input commands related to the video display device (100) to the remote control device (200) by operating the user input unit (430).

[0174] When the user input unit (430) is equipped with a hard key button, the user can input a command related to the video display device (100) to the remote control device (200) through a push operation of the hard key button.

[0175] For example, the user input unit (430) has a plurality of keys. Specifically, the user input unit (430) may have a power key, a confirmation key, a channel key, a volume key, etc. based on an IR signal.

[0176] When the user input unit (430) is equipped with a touch screen, the user can input commands related to the video display device (100) using the remote control device (200) by touching the soft keys of the touch screen. In addition, the user input unit (430) may be equipped with various types of input means that can be operated by the user, such as a scroll key or a jog key, and the present embodiment does not limit the scope of the present disclosure.

[0177] The sensor unit (440) may include a gyro sensor (441), an acceleration sensor (443), or a geomagnetic sensor (not shown). The gyro sensor (441) may sense information regarding the movement of the remote control device (200).

[0178] For example, a gyro sensor (441) can sense information about the operation of a remote control device (200) based on the x, y, and z axes. An acceleration sensor (443) can sense information about the movement speed of the remote control device (200). Meanwhile, a distance measuring sensor can be further provided, thereby sensing the distance to the display (180).

[0179] The output unit (450) can output a video or audio signal corresponding to the operation of the user input unit (430) or to a signal transmitted from the video display device (100). Through the output unit (450), the user can recognize whether the user input unit (430) is being operated or whether the video display device (100) is being controlled.

[0180] For example, the output unit (450) may be equipped with an LED module (451) that lights up when the user input unit (430) is operated or a signal is transmitted and received with the image display device (100) through the wireless communication unit (425), a vibration module (453) that generates vibration, an audio output module (455) that outputs audio, or a display module (457) that outputs audio.

[0181] The power supply unit (460) supplies power to the remote control device (200). The power supply unit (460) can reduce power waste by stopping the power supply when the remote control device (200) is not moved for a predetermined period of time. The power supply unit (460) can resume the power supply when a predetermined key provided on the remote control device (200) is operated.

[0182] The storage unit (470) can store various types of programs, application data, etc. required for the control or operation of the remote control device (200). If the remote control device (200) wirelessly transmits and receives signals through the image display device (100) and the RF module (421), the remote control device (200) and the image display device (100) transmit and receive signals through a predetermined frequency band. The control unit (480) of the remote control device (200) can store and refer to information regarding the frequency band through which signals can be wirelessly transmitted and received between the remote control device (200) and the paired image display device (100), etc., in the storage unit (470).

[0183] The control unit (480) controls all matters related to the control of the remote control device (200). The control unit (480) can transmit a signal corresponding to a predetermined key operation of the user input unit (430) or a signal corresponding to the movement of the remote control device (200) sensed by the sensor unit (440) to the image display device (100) via the wireless communication unit (425).

[0184] The user input interface unit (150) of the video display device (100) may be equipped with a wireless communication unit (151) capable of wirelessly transmitting and receiving signals with a remote control device (200), and a coordinate value calculation unit (415) capable of calculating the coordinate value of a pointer corresponding to the operation of the remote control device (200).

[0185] The user input interface unit (150) can wirelessly transmit and receive signals to and from the remote control device (200) via the RF module (412). In addition, the user input interface unit (150) can receive signals transmitted by the remote control device (200) according to the IR communication standard via the IR module (413).

[0186] The coordinate value calculation unit (415) can calculate the coordinate values ​​(x, y) of the pointer (205) to be displayed on the display (170) by correcting hand shake or error from a signal corresponding to the operation of the remote control device (200) received through the wireless communication unit (151).

[0187] A transmission signal of a remote control device (200) input to a video display device (100) through a user input interface unit (150) is transmitted to a signal processing device (170) of the video display device (100). The signal processing device (170) can determine information about the operation and key operation of the remote control device (200) from the signal transmitted from the remote control device (200) and control the video display device (100) in response thereto.

[0188] As another example, the remote control device (200) can calculate pointer coordinate values ​​corresponding to the operation and output them to the user input interface unit (150) of the image display device (100). In this case, the user input interface unit (150) of the image display device (100) can transmit information about the received pointer coordinate values ​​to the signal processing device (170) without a separate hand shake or error correction process.

[0189] In addition, as another example, the coordinate value calculation unit (415) may be provided inside the signal processing device (170) rather than the user input interface unit (150), unlike in the drawing.

[0190] Fig. 5 is an example of the wireless sound output device of Fig. 1.

[0191] Referring to the drawing, the wireless sound output device (500) may include a sensing unit (530), a communication unit (535), a memory (540), an interface (550), an audio output unit (560), a control unit (570), an input unit (585), and a power supply unit (590). When implemented in an actual application, these components may be combined into one component or one component may be subdivided into two or more components as needed.

[0192] The sensing unit (530) may be equipped with 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, gyro sensor, gravity sensor, etc. may be equipped with a 6-axis sensor.

[0193] The sensing unit (530) can output motion information of the wireless sound output device (500), for example, movement information (acceleration information, angular velocity information) or position information based on the x, y, and z axes.

[0194] Meanwhile, the sensing unit (530) may also sense temperature information, current information, voltage information, etc. of the wireless sound output device.

[0195] Meanwhile, the communication device (535) may provide an interface for communication with an external device. To this end, the communication device (535) may include a first communication module (535a) and a second communication module (535b).

[0196] For example, the first communication module (535a) within the communication device (535) may be a wireless communication module and provide an interface for wireless data communication such as Bluetooth.

[0197] For example, the second communication module (535b) within the communication device (535) may, as a wireless communication module, provide an interface for wireless data communication such as Wi-Fi or UWB.

[0198] The memory (540) may store a program for processing or controlling the control unit (570) within the wireless sound output device (500), or may perform a function for temporarily storing input or output data.

[0199] For example, the memory (540) can store audio format information or audio processing time information of the wireless sound output device (500).

[0200] The interface (550) may provide an interface for wired data communication, such as HDMI.

[0201] For example, the interface (550) can transmit audio format information or audio processing time information of a wireless sound output device (500) to a video display device (100).

[0202] The audio output unit (560) can output sound based on a processed audio signal in the control unit (570) within the wireless sound output device (500).

[0203] The control unit (570) can control the overall operation of the wireless sound output device (500) by controlling the operation of each unit within the wireless sound output device (500).

[0204] Meanwhile, the control unit (570) can perform signal processing on an audio signal received from the outside.

[0205] Meanwhile, the control unit (570) can play an audio signal received from the first communication module (535a) or the second communication module (535b).

[0206] Meanwhile, the input unit (585) may be equipped with buttons for initializing the wireless sound output device (500) or for inputting operations, etc.

[0207] Meanwhile, the input unit (585) may be equipped with a microphone (587) for sound collection.

[0208] Meanwhile, the input unit (585) may be equipped with a camera (not shown) for taking images.

[0209] The power supply unit (590) can supply power necessary for the operation of each component under the control of the control unit (570).

[0210] In particular, the power supply unit (590) may be equipped with a battery (not shown) that stores and outputs direct current power.

[0211] FIGS. 6A and 6B are drawings for reference in explaining the operation of a video display device related to the present disclosure.

[0212] FIG. 6a is a drawing showing an example of operation of a wireless sound output mode in a video display device related to the present disclosure, and FIG. 6b is a drawing referred to in the description of FIG. 6a.

[0213] Referring to the drawings, the image display device (100x) related to the present disclosure includes a communication device (165x) that performs communication with a wireless sound output device (500a, 500b), and a signal processing device (170x) that executes a wireless sound output mode.

[0214] The signal processing device (170x) can execute an application (610x) for wireless sound output mode through an internal processor (177x).

[0215] When the wireless sound output mode is executed, the processor (177x) in the signal processing device (170x) transmits a request (Sxa) for a timing synchronization function value (TSF value) at a first time point (TX1), and the communication device (165x) receives the request (Sxa) for a timing synchronization function value from the signal processing device (170x).

[0216] Meanwhile, the communication device (165x) can generate an interrupt signal (Sxb) in response to a request for a timing synchronization function value at a second time point (TX2) after the first time point (TX1).

[0217] And, the communication device (165x) transmits system timing information (SXc) based on an interrupt signal through the connection terminal (Pnx) at a third time point (TX3) after the second time point (TX2).

[0218] Accordingly, the signal processing device (170x) receives system timing information (SXc) through the connection terminal (Pny) at a third time point (TX3) after the second time point (TX2).

[0219] Next, the communication device (165x) transmits the first timing synchronization function value (Sxd) to the processor (177x) in the signal processing device (170x) at the fourth time point (TX4) after the third time point (TX3).

[0220] In response to this, the processor (177x) within the signal processing device (170x) receives the first timing synchronization function value (Sxd) from the communication device (165x) at the fourth time point (TX4) after storing the system timing information (SXc).

[0221] And, the processor (177x) within the signal processing device (170x) calculates the second timing synchronization function value (Sxe) based on the first timing synchronization function value (Sxd) and the system timing information (SXc) at the fifth time point (TX5) after the fourth time point (TX4).

[0222] And, the processor (177x) within the signal processing device (170x) can transmit a packet (Sxf) including a second timing synchronization function value at a sixth time point (TX6) after the fifth time point (TX5).

[0223] Specifically, a processor (177x) within a signal processing device (170x) can transmit a packet (Sxf) including a second timing synchronization function value to a wireless sound output device (500a, 500b) via a communication device (165x).

[0224] At this time, the processor (177x) in the signal processing device (170x) can transmit a packet (Sxf) containing a second timing synchronization function value and audio data to the wireless sound output device (500a, 500b) via the communication device (165x).

[0225] Meanwhile, according to FIGS. 6a and 6b, the processor (177x) in the signal processing device (170x) receives a request (Sxa) for a timing synchronization function value at a first time point (TX1), and then receives a first timing synchronization function value (Sxd) from the communication device (165x) at a fourth time point (TX4).

[0226] And, the processor (177x) in the signal processing device (170x) can transmit a packet (Sxf) including the second timing synchronization function value to the wireless sound output device (500a, 500b) through the communication device (165x) at the sixth time point (TX6).

[0227] That is, a period of Px14 may be required between a request for a timing synchronization function value (Sxa) and the reception of a first timing synchronization function value (Sxd).

[0228] Meanwhile, a period of Px16 may be required between a request for a timing synchronization function value (Sxa) and transmission of a packet (Sxf) containing a second timing synchronization function value.

[0229] In this way, according to the video display device (100x) related to the present disclosure, it is unclear whether the first timing synchronization function value (Sxd) from the communication device (165x) is a value before the first time point (TX1) as before the fourth time point (TX4), or a value between the first time point (TX1) and the fourth time point (TX4), or a value at any time between the first time point (TX1) and the fourth time point (TX4), and a delay occurs.

[0230] That is, since the exact timing information of the first timing synchronization function value (Sxd) is unclear or a delay occurs, the second timing synchronization function value attached when transmitting a packet (Sxf) is also unclear or a significant delay occurs.

[0231] Accordingly, in this disclosure, a method for reducing audio sync delay with a wireless sound output device (500) is proposed by clarifying the first timing synchronization function value, etc. This is described with reference to FIG. 7a and below.

[0232] FIG. 7a is an example of a flowchart showing an operation method of an image display device according to an embodiment of the present disclosure.

[0233] Meanwhile, an image display device (100) according to one embodiment of the present disclosure includes, as illustrated in FIG. 2, a display (180), a communication device (165) for exchanging data with a wireless sound output device (500), an audio output unit (185), a signal processing device (170) for outputting an image signal to the display (180), and a controller (175) for receiving a wake-on signal (Swk) from the communication device (165).

[0234] Referring to the drawing, the communication device (165) in the image display device (100) according to one embodiment of the present disclosure, when receiving a remote wake-on signal (Swo) according to the remote wake-on mode (S705), outputs a wake-on signal (Swk) to the controller (175) through the first pin (Pna) of the communication device (165) (S706).

[0235] The remote wake-on signal (Swo) at this time can be a wired or wireless remote wake-on signal.

[0236] Meanwhile, the remote wake-on signal (Swo) may be a WOWL (wake on wireless lan) signal.

[0237] Next, the controller (175) can transmit a power-on signal (Spo) to the signal processing device (170) based on the wake-on signal (Swk) (S707).

[0238] Next, the signal processing device (170) can control the display (180) to display a broadcast image or home screen based on the power-on signal (Spo) (S709).

[0239] Accordingly, based on a remote wake-on signal, the image display device (100) can be turned on remotely and a predetermined image can be displayed.

[0240] Next, the processor (177) in the signal processing device (170) can determine whether it is a wireless sound output mode (S715) and, if so, control the wireless sound output mode to be output.

[0241] For example, a processor (177) within a signal processing device (170) can execute an application corresponding to a wireless sound output mode based on an input signal.

[0242] Next, the processor (177) in the signal processing device (170) transmits a request (SGa) for a timing synchronization function value according to the execution of the wireless sound output mode (S720).

[0243] In response to this, in the wireless sound output mode, the communication device (165) receives a request (SGa) for a timing synchronization function value from the signal processing device (170).

[0244] Meanwhile, the Timing Synchronization Function (TSF) value may be data based on the IEEE 802.11 standard.

[0245] Next, the communication device (165) generates an interrupt signal (Sit) in response to a request (SGa) for a timing synchronization function value, and outputs the interrupt signal (Sit) through the first pin (Pna) of the communication device (165) (S725).

[0246] In response, the controller (175) receives an interrupt signal (Sit) through the second pin (PNb).

[0247] Meanwhile, it is preferable that the output pin that outputs the wake-on signal (Swk) in the remote wake-on mode and the output pin that outputs the interrupt signal (Sit) in the wireless sound output mode are the same as the first pin (Pna).

[0248] At this time, the first pin (Pna) may be a GPIO (General Purpose Input Output) pin.

[0249] Next, the controller (175) outputs controller timing information (SGd) based on the interrupt signal (Sit) (S730).

[0250] In response to this, the signal processing device (170) receives controller timing information (SGd).

[0251] Next, the signal processing device (170) can calculate a second timing synchronization function value (SGg) based on the controller timing information (SGd) and the first timing synchronization function value (SGe) received from the communication device (165) (S735).

[0252] Next, the signal processing device (170) can output a packet (SGh) including a second timing synchronization function value (SGg) (S740).

[0253] In response to this, the communication device (165) can receive a packet (SGh) including a second timing synchronization function value (SGg) and transmit the packet (SGh) including the second timing synchronization function value (SGg) to the line sound output device (500a, 500b) based on wireless communication (S745).

[0254] In this way, the second timing synchronization function value (SGg) is calculated based on the interrupt signal (Sit) from the communication device (165), so that the audio sync delay with the wireless sound output device (500a, 500b) can be reduced.

[0255] Meanwhile, according to FIG. 7a, when the communication device (165) receives a remote wake-on signal (Swo), it outputs a wake-on signal (Swk) to the controller (175) through the first pin (Pna) of the communication device (165), and in the wireless sound output mode, it outputs an interrupt signal (Sit) through the first pin (Pna) of the communication device (165). Accordingly, it is possible to reduce the audio sync delay with the wireless sound output devices (500a, 500b). In particular, it is possible to reduce the audio sync delay with the wireless sound output devices (500a, 500b) based on the interrupt signal (Sit) from the communication device (165).

[0256] FIG. 7b is another example of a flowchart showing an operating method of an image display device according to an embodiment of the present disclosure.

[0257] Referring to the drawing, the operating method of FIG. 7b differs from that of FIG. 7a in that the remote wake-on mode is not performed, and only the wireless sound output mode is performed.

[0258] That is, the image display device (100) according to the embodiment of the present disclosure can perform steps 720 (S720) to 745 (S745) of FIG. 7a depending on the wireless sound output mode.

[0259] Meanwhile, according to another embodiment of the present disclosure, in the wireless sound output mode, when the communication device (165) receives a request (SGa) for a timing synchronization function value from the signal processing device (170), the communication device (165) outputs an interrupt signal (Sit), the controller (175) outputs controller timing information (SGd) based on the interrupt signal (Sit), and the signal processing device (170) calculates a second timing synchronization function value (SGg) based on the controller timing information (SGd) and the first timing synchronization function value (SGe) received from the communication device (165), and outputs a packet (SGh) including the second timing synchronization function value (SGg).

[0260] Accordingly, it is possible to reduce audio sync delay with the wireless sound output device (500a, 500b). In particular, based on controller timing information (SGd), it is possible to reduce audio sync delay with the wireless sound output device (500a, 500b).

[0261] Figures 8a to 12 are drawings referenced in the description of Figures 7a to 7b.

[0262] Figures 8a and 8b are drawings for reference in the description of the remote wake-on mode.

[0263] Referring to the drawing, a communication device (165) in a video display device (100) according to one embodiment of the present disclosure outputs a wake-on signal (Swk) to a controller (175) through a first pin (Pna) of the communication device (165) when receiving a remote wake-on signal (Swo) according to a remote wake-on mode.

[0264] In response, the controller (175) receives a wake-on signal (Swk) through the second pin (PNb).

[0265] Next, the controller (175) can transmit a power-on signal (Spo) through the third pin (PNc) based on the wake-on signal (Swk).

[0266] In response to this, the signal processing device (170) can receive a power-on signal (Spo) and, based on the power-on signal (Spo), control the power supply unit (190) to switch from standby mode to active mode.

[0267] Accordingly, the power supply unit (190) can supply a second level voltage that is greater than the first level voltage in the standby mode to the signal processing device (170).

[0268] Meanwhile, unlike the above, it is also possible for a power-on signal (Spo) to be input to the power supply unit (190) so that the power supply unit (190) can switch from standby mode to active mode.

[0269] Next, the signal processing device (170) can control the display (180) to display a broadcast image or home screen (810) based on the power-on signal (Spo).

[0270] For example, the signal processing device (170) can control to execute a web-based operating system (OS) based on a power-on signal (Spo), execute an application for executing a home screen on the based operating system (OS), and display a home screen (810) based on the execution of the application.

[0271] FIG. 8b illustrates that the home screen (810) is displayed according to the remote wake-on mode.

[0272] For example, the signal processing device (170) can control the display (180) to display a home screen (810) including a first area (816) such as an app list, a second area (820) such as a live video or TV guide, and a third area (825) such as an advertisement video, based on a power-on signal (Spo), as shown in FIG. 8b.

[0273] Accordingly, after turning on the power of the video display device (100) remotely, the home screen (810) can be displayed.

[0274] Figures 9a and 9b are drawings for reference in the description of the wireless sound output mode.

[0275] Referring to the drawing, a processor (177) within a signal processing device (170) can execute an application (610) corresponding to a wireless sound output mode based on an input signal.

[0276] At this time, the processor (177) may be the processor (330) or the graphics processor (340) of FIG. 3.

[0277] Alternatively, the processor (177) may be a separate application processor different from the processor (330) or graphics processor (340) of FIG. 3.

[0278] Meanwhile, a signal processing device (170) according to one embodiment of the present disclosure transmits a request (SGa) for a timing synchronization function value at a first time point (Ta) according to execution of a wireless sound output mode.

[0279] In response to this, in the wireless sound output mode, the communication device (165) receives a request (SGa) for a timing synchronization function value from the signal processing device (170).

[0280] Next, the communication device (165) generates an interrupt signal (Sit) at a second time point (Tb) after the first time point (Ta) in response to a request (SGa) for a timing synchronization function value.

[0281] Next, the communication device (165) outputs an interrupt signal (Sit) through the first pin (Pna) of the communication device (165) at a third time point (Tc) after the second time point (Tb).

[0282] In response, the controller (175) receives an interrupt signal (Sit) through the second pin (PNb).

[0283] At this time, the first pin (Pna) and the second pin (PNb) may each be GPIO (General Purpose Input Output) pins.

[0284] Next, the controller (175) outputs controller timing information (SGd) based on the interrupt signal (Sit) at the fourth time point (Td) after the third time point (Tc).

[0285] In particular, the controller (175) can output controller timing information (SGd) through the third pin (PNc) at the fourth time point (Td).

[0286] In response to this, the signal processing device (170) receives controller timing information (SGd) through the fourth pin (PNe).

[0287] Meanwhile, the controller timing information (SGd) received by the signal processing device (170) can be stored in the first register (RG1).

[0288] In the drawing, it is exemplified that the first register (RG1) is provided within the processor (177).

[0289] Accordingly, the controller timing information (SGd) can be stored in the first register (RG1) within the processor (177).

[0290] Next, the communication device (165) can transmit the first timing synchronization function value (SGe) through the first pin (Pna) and other pins at the fifth time point (Te) after the fourth time point (Td).

[0291] At this time, the first timing synchronization function value (SGe) may be generated in the communication device (165).

[0292] As another example, the first timing synchronization function value (SGe) may be generated from a wireless sound output device (500a, 500b).

[0293] Meanwhile, the signal processing device (170) receives a first timing synchronization function value (SGe) from the communication device (165).

[0294] For example, the signal processing device (170) can receive a first timing synchronization function value (SGe) corresponding to a timing synchronization function value subsequent to the controller timing information (SGd).

[0295] Next, the processor (177) in the signal processing device (170) reads the controller timing information (SGd) stored in the first register (RG1) at the sixth time point (Tf) after the fifth time point (Te).

[0296] That is, the processor (177) within the signal processing device (170) can read out the controller timing information (SGd) from the first register (RG1) after receiving the first timing synchronization function value (SGe).

[0297] Next, the processor (177) in the signal processing device (170) calculates a second timing synchronization function value (SGg) based on the controller timing information (SGd) and the first timing synchronization function value (SGe) received from the communication device (165) at a seventh time point (Tg) after the sixth time point (Tf).

[0298] Next, the processor (177) within the signal processing device (170) can output a packet (SGh) including a second timing synchronization function value (SGg) at an eighth time point (Th) after the seventh time point (Tg).

[0299] Specifically, the processor (177) within the signal processing device (170) can transmit a packet (SGh) including a second timing synchronization function value (SGg) to a wireless sound output device (500a, 500b) via the communication device (165).

[0300] At this time, the processor (177) in the signal processing device (170) can transmit the second timing synchronization function value (SGg) and the packet (SGf) containing audio data to the wireless sound output device (500a, 500b) via the communication device (165).

[0301] Accordingly, audio sync delay with the wireless sound output device (500a, 500b) can be reduced.

[0302] Meanwhile, the controller (175) can output a controller clock (SGm) in addition to the controller timing information (SGd) through the fifth pin (PNd) based on an interrupt signal (Sit).

[0303] In response to this, the signal processing device (170) can receive a controller clock (SGm).

[0304] Meanwhile, the controller clock (SGm) can be stored in the second register (RG2).

[0305] In the drawing, it is exemplified that a second register (RG2) is provided within the processor (177). Accordingly, the controller clock (SGm) can be stored in the first register (RG1) within the processor (177).

[0306] Meanwhile, the signal processing device (170) can read out the controller timing information (SGd) from the first register (RG1) and read out the controller clock (SGm) from the second register (RG2) after receiving the first timing synchronization function value (SGe).

[0307] At this time, the controller clock (SGm) and the controller timing information (SGd) are preferably received later in the processor (177) than the first timing synchronization function value (SGe), but are generated earlier than the first timing synchronization function value (SGe).

[0308] That is, it is preferable that the first timing synchronization function value (SGe) follows the controller clock (SGm) and the controller timing information (SGd).

[0309] Accordingly, the signal processing device (170) can receive a first timing synchronization function value (SGe) corresponding to a timing synchronization function value subsequent to the controller clock (SGm) and the controller timing information (SGd).

[0310] Meanwhile, the signal processing device (170) can calculate the second timing synchronization function value (SGg) based on the controller clock (SGm), the controller timing information (SGd), and the first timing synchronization function value (SGe) at the seventh time point (Tg).

[0311] And, the signal processing device (170) can output a packet (SGh) including a second timing synchronization function value (SGg) at the eighth time point (Th).

[0312] Meanwhile, the communication device (165) can transmit a packet (SGh) including a second timing synchronization function value (SGg) to the wireless sound output device (500a, 500b).

[0313] Meanwhile, according to FIGS. 9a and 9b, the period between the request for the timing synchronization function value (SGa) and the reception of the first timing synchronization function value (SGe) may be a Pae period.

[0314] Meanwhile, at a third time point (Tc), an interrupt signal (Sit) is output through the first pin (Pna) of the communication device (165), and based on the interrupt signal (Sit), controller timing information (SGd) is output at a fourth time point (Td), and then at a fifth time point (Te), a first timing synchronization function value (SGe) is received by the signal processing device (170).

[0315] That is, the period between the output of the interrupt signal (Sit) and the reception of the first timing synchronization function value (SGe) may be the Pce period.

[0316] Meanwhile, since the first timing synchronization function value (SGe) has a subsequent timing synchronization function value of the interrupt signal (Sit), the signal processing device (170) can receive the first timing synchronization function value (SGe) from the communication device (165) within a Pce period shorter than the Px1 period of FIG. 8b.

[0317] That is, the signal processing device (170) can receive a first timing synchronization function value (SGe) that is closer to real time than that of FIG. 8b.

[0318] And, the signal processing device (170) can output a packet (SGh) including a second timing synchronization function value (SGg) based on a first timing synchronization function value (SGe) closer to real time than that of FIG. 8b, a controller clock (SGm), and controller timing information (SGd).

[0319] Meanwhile, a Pch period may be required between the output of the interrupt signal (Sit) and the transmission of the packet (SGh) containing the second timing synchronization function value (SGg).

[0320] Meanwhile, the communication device (165) can transmit a packet (SGh) including a second timing synchronization function value (SGg) and audio data within a Pch period, which is a shorter period than the Px16 period of FIG. 8b.

[0321] Accordingly, it is possible to reduce the audio sync delay with the wireless sound output device (500a, 500b). In particular, it is possible to reduce the audio sync delay with the wireless sound output device (500a, 500b) based on an interrupt signal (Sit) from the communication device (165).

[0322] Figure 10 illustrates various signals output from the first pin (Pna) of the communication device (165) in remote wake-on mode and wireless sound output mode.

[0323] Referring to the drawing, (a) of FIG. 10 illustrates a wake-on signal (Swk) output through the first pin (Pna) of the communication device (165) in the remote wake-on mode.

[0324] Figure 10 (b) illustrates an interrupt signal (Sit) output through the first pin (Pna) of the communication device (165) in a wireless sound output mode.

[0325] Meanwhile, the wake-on signal (Swk) may be a pulse signal having a first pulse width (PWa) and a high level of a first level (LV1).

[0326] Meanwhile, the interrupt signal (Sit) may be a pulse signal having a second pulse width (PWb) smaller than the first pulse width (PWa) and a high level of the first level (LV1).

[0327] In the drawing, the high level of the wake-on signal (Swk) and the high level of the interrupt signal (Sit) are shown as being the same, but unlike the drawing, they may be different.

[0328] FIG. 11 is an example of an internal block diagram of a video display device according to another embodiment of the present disclosure.

[0329] Referring to the drawings, a video display device (100y) according to another embodiment of the present disclosure includes a display (180), a communication device (165) that exchanges data with a wireless sound output device (500), an audio output unit (185), a signal processing device (170y) that outputs a video signal to the display (180), and a controller (175y) that receives a wake-on signal (Swk) from the communication device (165).

[0330] Meanwhile, the image display device (100y) of FIG. 11 is similar to the image display device (100) of FIG. 9a, but unlike the image display device (100) of FIG. 9a, there is a difference in that the first register (RG1) and the second register (RG2) are provided within the controller (175y).

[0331] That is, the processor (177y) in the signal processing device (170y) in the image display device (100y) of Fig. 11 does not have a first register (RG1) and a second register (RG2).

[0332] Figure 12 is a diagram illustrating a wireless sound output mode.

[0333] Referring to the drawing, the image display device (100) and the plurality of wireless sound output devices (500a, 500b) within the sound output system (10) can output the sound of each channel in the wireless sound output mode.

[0334] For example, in the wireless sound output mode, the video display device (100) can output sound (SMa) of the first channel, the first wireless sound output device (500a) can output sound (SMd) of the second channel, and the second wireless sound output device (500b) can output sound (SMb) of the third channel.

[0335] In particular, according to the wireless sound output mode of FIGS. 7a to 11, a first timing synchronization function value (SGe) can be received based on an interrupt signal (Sit) output through a first pin (Pna) of a communication device (165), a second timing synchronization function value (SGg) can be calculated based on the first timing synchronization function value (SGe), and a packet (SGh) including the second timing synchronization function value (SGg) can be output.

[0336] Accordingly, audio sync delay with the wireless sound output device (500a, 500b) can be reduced.

[0337] Although the preferred embodiments of the present disclosure have been illustrated and described above, the present disclosure is not limited to the specific embodiments described above, and various modifications may be made by a person skilled in the art to which the present invention pertains without departing from the gist of the present disclosure as claimed in the claims, and such modifications should not be understood individually from the technical idea or prospect of the present disclosure.

Claims

1. Display; A communication device that exchanges data with a wireless sound output device; Audio output; A signal processing device that outputs a video signal to the above display; a controller for receiving a wake-on signal from the communication device; The above communication device, When a remote wake-on signal is received, the wake-on signal is output to the controller through the first pin of the communication device, A video display device that outputs the interrupt signal through the first pin of the communication device in a wireless sound output mode.

2. In paragraph 1, The above controller, Based on the wake-on signal, a power-on signal is transmitted to the signal processing device, The above signal processing device, A video display device that controls the display to display a broadcast image or a home screen based on the power-on signal.

3. In paragraph 1, In the above wireless sound output mode, The above communication device outputs an interrupt signal when receiving a request for a timing synchronization function value from the signal processing device, The above controller outputs controller timing information based on the interrupt signal, An image display device in which the signal processing device calculates a second timing synchronization function value based on the controller timing information and the first timing synchronization function value received from the communication device, and outputs a packet including the second timing synchronization function value.

4. In paragraph 3, The above communication device, A video display device that transmits a packet including the second timing synchronization function value to the wireless sound output device.

5. In paragraph 3, The above signal processing device, A video display device that receives the first timing synchronization function value corresponding to the timing synchronization function value subsequent to the controller timing information.

6. In paragraph 3, The above controller, Based on the above interrupt signal, in addition to the controller timing information, a controller clock is additionally output, The above signal processing device, A video display device that calculates a second timing synchronization function value based on the controller clock, the controller timing information, and the first timing synchronization function value, and outputs a packet including the second timing synchronization function value.

7. In paragraph 6, The above signal processing device, A video display device that receives the first timing synchronization function value corresponding to the controller clock and the timing synchronization function value subsequent to the controller timing information.

8. In paragraph 3, An image display device further comprising a first register storing the controller timing information.

9. In paragraph 8, The above signal processing device, An image display device that reads out the controller timing information from the first register after receiving the first timing synchronization function value.

10. In paragraph 3, A first register (RG1) storing the above controller timing information; and A display device further comprising a second register storing the controller clock.

11. In paragraph 10, The above signal processing device, An image display device that reads out the controller timing information from the first register and reads out the controller clock from the second register after receiving the first timing synchronization function value.

12. In paragraph 6, The above controller, A first register (RG1) storing the above controller timing information; and An image display device comprising a second register storing the above controller clock.

13. In paragraph 6, The above signal processing device, A first register (RG1) storing the above controller timing information; and An image display device comprising a second register storing the above controller clock.

14. In paragraph 3, The above signal processing device, Equipped with a processor that executes the above wireless sound output mode, The above processor, A video display device that calculates a second timing synchronization function value based on the controller timing information and the first timing synchronization function value, and outputs a packet including the second timing synchronization function value.

15. Display; A communication device that exchanges data with a wireless sound output device; Audio output; A signal processing device that outputs a video signal to the above display; A controller for transmitting a power-on signal to the signal processing device when power is turned on; In wireless sound output mode, The above communication device outputs an interrupt signal when receiving a request for a timing synchronization function value from the signal processing device, The above controller outputs controller timing information based on the interrupt signal, An image display device in which the signal processing device calculates a second timing synchronization function value based on the controller timing information and the first timing synchronization function value received from the communication device, and outputs a packet including the second timing synchronization function value.

16. In paragraph 15, The above communication device, A video display device that transmits a packet including the second timing synchronization function value to the wireless sound output device.

17. In paragraph 15, The above signal processing device, A video display device that receives the first timing synchronization function value corresponding to the timing synchronization function value subsequent to the controller timing information.

18. In paragraph 15, The above controller, Based on the above interrupt signal, in addition to the controller timing information, a controller clock is additionally output, The above signal processing device, A video display device that calculates a second timing synchronization function value based on the controller clock, the controller timing information, and the first timing synchronization function value, and outputs a packet including the second timing synchronization function value.

19. In paragraph 15, The above communication device, When a remote wake-on signal is received, the wake-on signal is output to the controller through the first pin of the communication device, A video display device that outputs the interrupt signal through the first pin of the communication device in the above wireless sound output mode.

20. In paragraph 19, The above controller, Based on the wake-on signal, the power-on signal is transmitted to the signal processing device, The above signal processing device, A video display device that controls the display to display a broadcast image or a home screen based on the power-on signal.

Images