Display device and wireless networking distance measurement method

Abstract

The invention relates to a display device and a wireless networking distance measurement method. The display device includes: a display; a communicator; the first processor is configured to send first information to the second processor under the condition that the display equipment and external equipment are wirelessly networked; the second processor is connected with the first processor, receives the first information to restart timing, and returns second information; the first processor receives the second information so as to start home terminal timing and transmit the first audio data added with the first timestamp to the external equipment through the communicator; the microphone is connected with the second processor and is used for collecting audio played by external equipment and transmitting the audio to the second processor; the second processor receives the second audio data, adds a second timestamp and sends the second audio data to the first processor; and the first processor determines the distance between the display equipment and the external equipment according to the first audio data, the first timestamp, the second audio data and the second timestamp. The display device can realize more accurate wireless networking distance measurement.

Description

Technical Field

[0001] The present application relates to the technical field of smart televisions, and in particular to a display device and a wireless networking ranging method. Background Art

[0002] Display devices usually support wireless networking with external devices, for example, networking with wireless speakers. When wireless networking, it is necessary to measure the distance between the external device and the display device to determine the appropriate position of the external device. However, the accuracy of wireless networking distance measurement still needs to be improved. Summary of the invention

[0003] The present application provides a display device and a wireless networking distance measurement method to improve the accuracy of wireless networking distance measurement.

[0004] In a first aspect, some embodiments provide a display device, including:

[0005] a display configured to display images from the broadcast system and / or the network;

[0006] a communicator configured to connect to a wired network and / or a wireless network;

[0007] The first processor is configured to: when the display device is wirelessly networked with the external device through the communicator, send first information to the second processor; the first information carries an instruction to restart the timing;

[0008] The second processor is connected to the first processor and is configured to: restart the timing and return the second information to the first processor when receiving the first information;

[0009] The first processor is further configured to: upon receiving the second information returned by the second processor, record the current time, start timing on the local end with the current time as the starting point, and transmit the first audio data with the first timestamp added to the external device through the communicator; the first timestamp is obtained based on the timing on the local end;

[0010] The microphone is connected to the second processor and is configured to: collect audio played by the external device and transmit it to the second processor; the second audio data is the audio played by the external device after receiving the first audio data;

[0011] The second processor is further configured to: receive the second audio data, add a second timestamp to the second audio data based on the receiving time, and send the second audio data with the second timestamp to the first processor;

[0012] The first processor is further configured to: receive the second audio data with the second timestamp added thereto and returned by the second processor, and determine the distance between the display device and the external device according to the first audio data, the first timestamp, the second audio data and the second timestamp.

[0013] In one of the embodiments, the first processor is further configured to: when the display device is wirelessly networked with an external device through the communicator, switch the input-output interface to an output mode, send a first level signal to the second processor based on the input-output interface in the output mode, and switch the input-output interface to an input mode after sending the first level signal;

[0014] The second processor is further configured to: restart timing when receiving the first level signal, and return a second level signal to the first processor;

[0015] The first processor is further configured to: receive the second level signal returned by the second processor based on the input-output interface of the input mode, and upon receiving the second level signal, record the current time and start timing on the local end with the current time as the starting point.

[0016] In one embodiment, the first processor is further configured to: transmit first audio data to an external device through a communicator, the first audio data being square wave audio; and add a first timestamp to a square wave rising edge and / or a square wave falling edge of the first audio data based on local timing.

[0017] In one embodiment, the first processor is further configured to:

[0018] Mapping a second timestamp corresponding to the second processor to a third timestamp corresponding to the first processor;

[0019] According to the second audio data and the third timestamp, a corresponding waveform is obtained by fitting; the waveform has a third timestamp corresponding to a peak and / or a trough of the waveform;

[0020] Determine a time difference between a first timestamp corresponding to the first audio data and a third timestamp corresponding to the waveform;

[0021] The distance between the display device and the external device is determined based on the time difference and the speed of sound propagation.

[0022] In one embodiment, the first processor is further configured to:

[0023] determining a distance difference between the distance and a preset distance;

[0024] When the distance difference is less than a preset difference, determining that the wireless networking between the display device and the external device is valid;

[0025] When the distance difference is greater than or equal to the preset difference, it is determined that the wireless networking between the display device and the external device is invalid.

[0026] In one embodiment, the first processor is a system-level processor of the display device; and the second processor is a digital signal processor in the display device.

[0027] In one embodiment, the input / output interface of the first processor is a general purpose input / output interface.

[0028] In one of the embodiments, the microphone is further configured to transmit second audio data to the second processor based on pulse density modulation.

[0029] The first processor and the second processor of the above-mentioned display device realize the time synchronization of the first processor and the second processor through the interaction of the first information and the second information, so that the first timestamp added by the first processor to the audio data sent and the second timestamp added to the audio data returned by the second processor can correspond to the same starting time point, which can avoid the corresponding time error caused by the first processor being unable to directly obtain audio from the microphone of the display device and the time required for the second processor to receive and process the audio collected by the microphone, thereby making the distance between the display device and the external device determined according to the first audio data, the first timestamp, the second audio data and the second timestamp more accurate. In addition, the display device does not need to change its own hardware, does not need to increase the number of microphones or adjust the microphone structure, etc., which improves the corresponding efficiency and reduces costs.

[0030] In a second aspect, some embodiments further provide a wireless networking ranging method, which is applied to a first processor of a display device, comprising:

[0031] In the case of wireless networking with an external device through a communicator of the display device, sending a first message to a connected second processor; the first message carries an instruction to restart timing;

[0032] When receiving the second information returned by the second processor, the current time is recorded, the local timing is started with the current time as the starting point, and the first audio data with the first timestamp added is transmitted to the external device through the communicator; the first timestamp is obtained based on the local timing; the second information is returned by the second processor when the first information is received and the timing is restarted;

[0033] receiving second audio data returned by the second processor and added with a second timestamp; the second audio data corresponds to the audio played by the external device after receiving the first audio data; the second audio data is collected by the microphone of the display device and returned after adding a second timestamp through the second processor;

[0034] The distance between the display device and the external device is determined according to the first audio data, the first timestamp, the second audio data, and the second timestamp.

[0035] The first processor of the above-mentioned display device realizes the time synchronization with the second processor in the same display device by sending the first information and receiving the second information; based on the time synchronization, the first timestamp is added to the first audio data sent, and the second audio data with the second timestamp added is received and returned by the second processor; since the second audio data is received and played by the external device based on the first audio data, and the second timestamp is added by the second processor based on the audio data reception time when the time synchronization is completed, the difference between the first timestamp and the second timestamp can more accurately reflect the time taken for the audio to be transmitted from the external device to the display device, avoiding the corresponding time error caused by the first processor being unable to directly obtain the audio from the microphone, the second processor receiving and processing the microphone audio acquisition time, etc. Furthermore, the first processor can determine a more accurate distance between the display device and the external device based on the first audio data, the first timestamp, the second audio data and the second timestamp.

[0036] In a third aspect, some embodiments further provide a wireless networking ranging method, which is applied to a second processor of a display device, comprising:

[0037] In the case where the display device and the external device are wirelessly networked, if the first information sent by the first processor of the display device is received, the timing is restarted and the second information is returned to the first processor; the first information carries an instruction to restart the timing; the second information is used to instruct the first processor to record the current time when the second information is received, and start the local timing with the current time as the starting point, so as to transmit the first audio data with the first timestamp added to the external device; the first timestamp is obtained based on the local timing of the first processor;

[0038] Receive the second audio data collected by the microphone of the display device, add a second timestamp to the second audio data based on the receiving time, and send the second audio data with the second timestamp to the first processor; the second audio data is the audio played after the external device receives the first audio data.

[0039] The second processor of the above-mentioned display device realizes time synchronization with the first processor in the display device by receiving the first information and sending the second information; based on the time synchronization, a second timestamp is added to the second audio data collected by the received microphone and transmitted to the first processor; since the second audio data is received and played by the external device after receiving the first audio data, and the second timestamp is added by the second processor when the time synchronization is completed, the second timestamp can more accurately reflect the time when the audio is transmitted to the display device, avoiding the corresponding time error caused by the first processor being unable to directly obtain audio from the microphone, the second processor needing time to receive and process the audio collected by the microphone, etc., which helps to determine a more accurate distance between the display device and the external device. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 A schematic diagram of an operation scenario between a display device and a control device provided in some embodiments of the present application;

[0042] Figure 2 A schematic diagram of the hardware configuration of a display device provided in some embodiments of the present application;

[0043] Figure 3 A schematic diagram of the hardware configuration of a control device provided in some embodiments of the present application;

[0044] Figure 4 A schematic diagram of software configuration of a display device provided in some embodiments of the present application;

[0045] Figure 5 A schematic diagram of networking of a display device and external devices provided in some embodiments of the present application;

[0046] Figure 6a A schematic diagram of a flow chart of a first processor in a display device configured to execute in some embodiments of the present application;

[0047] Figure 6b A schematic diagram of a flow chart of a second processor in a display device configured to execute in some embodiments of the present application;

[0048] Figure 6c A schematic diagram of a flow chart of a microphone configured to be executed in a display device provided in some embodiments of the present application;

[0049] Figure 7 A flowchart of a wireless networking ranging method provided in some embodiments of the present application;

[0050] Figure 8 Another schematic diagram of a flow chart of a wireless networking ranging method provided in some embodiments of the present application;

[0051] Fig. 9 A further flow chart of a wireless networking ranging method provided in some embodiments of the present application;

[0052] Fig.10 A timing diagram for synchronizing a SOC chip and a DSP chip in a display device provided in some embodiments of the present application;

[0053] Fig.11 A framework diagram of synchronizing a SOC chip and a DSP chip in a display device provided in some embodiments of the present application;

[0054] Fig.12 A timing diagram of a wireless networking ranging method provided for some embodiments of the present application. DETAILED DESCRIPTION

[0055] The following embodiments are described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following embodiments do not represent all implementations consistent with the present application. They are only examples of systems and methods consistent with some aspects of the present application as detailed in the claims.

[0056] It should be noted that the brief description of terms in this application is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their common and usual meanings.

[0057] The terms "first", "second", "third", etc. in the specification and claims of this application and the above drawings are used to distinguish similar or similar objects or entities, and do not necessarily mean to limit a specific order or sequence, unless otherwise noted. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances.

[0058] The terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to all the components expressly listed but may include other components not expressly listed or inherent to such product or device.

[0059] The term "module" refers to any known or later developed hardware, software, firmware, artificial intelligence, fuzzy logic or combination of hardware and / or software code that is capable of performing the functions associated with that element.

[0060] In the embodiment of the present application, the display device 200 generally refers to a device with image display and data processing capabilities. For example, the display device 200 includes but is not limited to a smart TV, a mobile terminal, a computer, a monitor, an advertising screen, a wearable device, a virtual reality device, an augmented reality device, etc.

[0061] Figure 1 This is a schematic diagram of an operation scenario between a display device and a control device provided in some embodiments of the present application. Figure 1 As shown in FIG. 1 , the user can operate the display device 200 through touch operation, the mobile terminal 300 and the control device 100. For example, the control device 100 can be a remote controller, a stylus pen, a handle, etc.

[0062] The mobile terminal 300 can be used as a control device for performing human-computer interaction between a user and the display device 200. The mobile terminal 300 can also be used as a communication device for establishing a communication connection with the display device 200 and performing data interaction. In some embodiments, the mobile terminal 300 can install software applications with the display device 200, and achieve connection and communication through a network communication protocol to achieve the purpose of one-to-one control operation and data communication. The audio and video content displayed on the mobile terminal 300 can also be transmitted to the display device 200 to achieve a synchronous display function.

[0063] like Figure 1 As also shown in FIG. 4 , the display device 200 also communicates data with the server 400 through various communication methods. The display device 200 may be allowed to communicate and connect through a local area network (LAN), a wireless local area network (WLAN) and other networks.

[0064] The display device 200 may provide a broadcast receiving television function, and may also additionally provide an intelligent network television function of a computer support function, including but not limited to network television, smart television, Internet Protocol television (IPTV), etc.

[0065] Figure 2 Some embodiments of the present application provide Figure 1 2 is a block diagram of the hardware configuration of the display device 200.

[0066] In some embodiments, the display device 200 may include at least one of a tuner 210, a communication device 220, a detector 230, a device interface 240, a controller 250, a display 260, an audio output device 270, a memory, a power supply, and a user input interface.

[0067] In some embodiments, the detector 230 is used to collect signals of the external environment or external interaction. For example, the detector 230 includes a light receiver, a sensor for collecting the intensity of ambient light; or, the detector 230 includes an image collector, such as a camera, which can be used to collect external environment scenes, user attributes or user interaction gestures; or, the detector 230 includes a sound collector, such as a microphone, etc., for receiving external sounds.

[0068] In some embodiments, the display 260 includes a display function component for presenting a picture, and a driving component for driving an image display. The display 260 is used to receive an image signal output from the controller 250 for display. For example, the display 260 can be used to display video content, image content, and components of a menu control interface and a user control UI interface.

[0069] In some embodiments, the communication device 220 is a component for communicating with an external device or server 400 according to various communication protocol types. The display device 200 may be provided with a plurality of communication devices 220 according to different supported communication modes. For example, when the display device 200 supports wireless network communication, the display device 200 may be provided with a communication device 220 including a WiFi function. When the display device 200 supports Bluetooth connection communication, the display device 200 needs to be provided with a communication device 220 including a Bluetooth function.

[0070] The communication device 220 can enable the display device 200 to communicate with the external device or server 400 by wireless or wired connection. Among them, the wired connection can connect the display device 200 with the external device through components such as data cables and interfaces. The wireless connection can connect the display device 200 with the external device through wireless signals or wireless networks. The display device 200 can establish a connection relationship with the external device directly, or indirectly establish a connection relationship through a gateway, a router, a connection device, etc.

[0071] In some embodiments, the controller 250 may include at least one of a central processing unit, a video processor, an audio processor, a graphics processor, and a power processor, and a first interface to an nth interface for input / output. The controller 250 controls the operation of the display device and responds to the user's operation through various software control programs stored in the memory. The controller 250 controls the overall operation of the display device 200.

[0072] In some embodiments, the controller 250 and the tuner-demodulator 210 may be located in different separate devices, that is, the tuner-demodulator 210 may also be located in an external device of the main device where the controller 250 is located, such as an external set-top box.

[0073] In some embodiments, the user may input a user command through a graphical user interface (GUI) displayed on the display 260 , and the user input interface receives the user input command through the graphical user interface (GUI).

[0074] In some embodiments, the audio output device 270 may be a local speaker of the display device 200, or may be an external audio output device of the display device 200. In particular, for the external audio output device of the display device 200, the display device 200 may also be provided with an external audio output terminal, and the audio output device may be connected to the display device 200 through the external audio output terminal to output the sound of the display device 200.

[0075] In some embodiments, the user input interface 280 may be used to receive instructions from a user.

[0076] Figure 3 Some embodiments of the present application provide Figure 1 The hardware configuration diagram of the control device in the figure. Figure 3 As shown, the control device 100 may include: a controller 110, a communication interface 130, a user input / output interface, a memory, and a power supply.

[0077] The control device 100 is configured to control the display device 200 , and can receive user input operation instructions, and convert the operation instructions into instructions that the display device 200 can recognize and respond to, playing the role of an interactive intermediary between the user and the display device 200 .

[0078] In some embodiments, the control device 100 may be a smart device, for example, the control device 100 may be installed with various applications for controlling the display device 200 according to user needs.

[0079] In some embodiments, Figure 1 As shown, the mobile terminal 300 or other intelligent electronic devices can play a similar function as the control device 100 after installing the application for controlling the display device 200 .

[0080] The controller 110 includes a processor 112, a RAM 113, a ROM 114, a communication interface 130, and a communication bus. The controller 110 is used to control the operation and operation of the control device 100, as well as the communication and cooperation between the internal components and the external and internal data processing functions.

[0081] The communication interface 130 implements communication of control signals and data signals with the display device 200 under the control of the controller 110. The communication interface 130 may include at least one of other near field communication modules such as a WiFi chip 131, a Bluetooth module 132, and an NFC module 133.

[0082] The user input / output interface 140 , wherein the input interface includes at least one of other input interfaces such as a microphone 141 , a touch panel 142 , a sensor 143 , and a button 144 .

[0083] In some embodiments, the control device 100 includes at least one of a communication interface 130 and an input / output interface 140. The control device 100 is configured with a communication interface 130, such as a WiFi, Bluetooth, NFC or other module, and can encode the user input command through the WiFi protocol, Bluetooth protocol, or NFC protocol and send it to the display device 200.

[0084] The memory 190 is used to store various operating programs, data and applications for driving and controlling the control device 100 under the control of the controller. The memory 190 can store various control signal instructions input by the user.

[0085] The power supply 180 is used to provide operating power support for each component of the control device 100 under the control of the controller.

[0086] In order to perform user interaction, in some embodiments, the display device 200 may run an operating system. The operating system is a computer program for managing and controlling hardware resources and software resources in the display device 200. The operating system may provide a user interface (control the display device), allow the user to interact with the display device 200, and support the running of various application programs.

[0087] It should be noted that the operating system may be a native operating system based on a specific operating platform, or a third-party operating system deeply customized based on a specific operating platform, or an independent operating system specially developed for the display device.

[0088] The operating system can be divided into different modules or layers according to the functions implemented, such as Figure 4 As shown, in some embodiments, the system is divided into four layers, from top to bottom, namely, the application layer (Applications layer) (referred to as "application layer"), the application framework layer (Application Framework layer) (referred to as "framework layer"), the system library layer and the kernel layer.

[0089] In some embodiments, the application layer is used to provide services and interfaces for applications so that the display device 200 can run applications and interact with users based on applications. At least one application can be run in the application layer, and these applications can be window programs, system settings programs, clock programs, etc. that come with the operating system; they can also be applications developed by third-party developers. In specific implementations, the application packages in the application layer are not limited to the above examples.

[0090] The framework layer provides application programming interfaces (APIs) and programming frameworks for applications. The application framework layer includes some predefined functions. The application framework layer is equivalent to a processing center that determines the actions of applications in the application layer. Applications can access system resources and obtain system services during execution through the API interface.

[0091] like Figure 4 As shown, in the embodiment of the present application, the application framework layer includes a view system, managers, content providers, etc., wherein the view system can design and implement the interface and interaction of the application, and the view system includes lists, grids, text boxes, buttons, etc. The manager includes at least one of the following modules: an activity manager is used to interact with all activities running in the system; a location manager is used to provide system services or applications with access to system location services; a package manager is used to retrieve various information related to the application package currently installed on the device; a notification manager is used to control the display and clearing of notification messages; and a window manager is used to manage icons, windows, toolbars, wallpapers, and desktop components on the user interface.

[0092] In some embodiments, the activity manager is used to manage the life cycle of each application and the usual navigation back function, such as controlling the exit, opening, and back of the application. The window manager is used to manage all window programs, such as obtaining the display screen size, determining whether there is a status bar, locking the screen, capturing the screen, and controlling the display window changes, for example, reducing the display window, shaking the display, distorting the display, etc.

[0093] In some embodiments, the system runtime layer can provide support for the framework layer. When the framework layer is used, the operating system will run the instruction library contained in the system runtime layer, such as the C / C++ instruction library, to implement the functions to be implemented by the framework layer.

[0094] In some embodiments, the kernel layer is a functional layer between the hardware and software of the display device 200. The kernel layer can implement functions such as hardware abstraction, multitasking, and memory management. Figure 4 As shown, the kernel layer may be configured with hardware drivers, and the drivers included in the kernel layer may be at least one of the following drivers: audio driver, display driver, Bluetooth driver, camera driver, WIFI driver, USB driver, HDMI driver, sensor driver (such as fingerprint sensor, temperature sensor, pressure sensor, etc.), and power driver, etc.

[0095] It should be noted that the above example is only a simple division of the operating system functions and does not constitute a limitation on the specific operating system form of the display device 200 in the embodiment of the present application. Depending on factors such as the function of the display device and the type of operating system, the number of levels and specific level types contained in the operating system may be expressed in other forms.

[0096] As mentioned above, the display device can be connected to an external device, for example, wireless speakers are networked. During the networking process, the distance between the external device and the display device needs to be measured to determine the appropriate position of the external device. For example, if the distance between the wireless speaker and the display device is not appropriate, the audio playback effect of the wireless speaker will be affected.

[0097] Acoustic distance measurement can be used to measure the distance between an external device and a display device. For example, an external device plays a piece of audio, and the display device collects the audio. The distance between the external device and the display device can be determined by the propagation time and propagation speed of the audio. It can be seen that the calculation of the audio propagation time by the display device is the key to distance measurement. However, different display devices have different hardware structures, and different hardware structures may affect the calculation of the audio propagation time.

[0098] For display devices with a hardware structure in which a DSP (Digital Signal Processing) chip is connected to a microphone, since the far-field voice DSP chip is connected to the microphone array, the display device's mainboard SOC (System on Chip) chip cannot directly obtain recording data from the microphone, which will result in a corresponding time error. At the same time, since the time required for the DSP chip to process the audio collected by the microphone is not fixed, the time error is also not fixed. Since the time error is not fixed, a fixed value cannot be used to offset the time error. In addition, if the hardware structure of the display device is changed, the corresponding efficiency is low and the cost is high.

[0099] Based on the above analysis, in some embodiments of the present application, the DSP chip and the SOC chip are synchronized, based on the synchronized time point; when the audio data used for ranging is sent from the display device to the external device, the SOC chip adds a corresponding timestamp; when the audio is collected and processed, the DSP chip also adds a corresponding timestamp; and ranging is achieved by calculating the difference between the two timestamps.

[0100] Some embodiments of the present application provide Figure 5 The display device 200 shown can collect audio played by the external device 500; the display device 200 can realize wireless connection and networking with the external device 500 through Bluetooth, WIFI, etc.; the external device 500 can be a device with audio playback function and connection function with the display device 200, for example, the external device 500 can be but not limited to various types of wireless speakers, and the speakers can be but not limited to various types of active speakers and passive speakers, etc.

[0101] In an exemplary embodiment, a display device is provided, including: a display configured to display an image from a broadcast system and / or a network; a communicator configured to connect to a wired network and / or a wireless network; a first processor; a second processor; and a microphone.

[0102] The display device may be the display device 200 described above. For understanding the display device and its components, unless otherwise specified, please refer to the relevant description of the display device 200 in the above text. For example, for understanding the display, please refer to the display 260 in the above display device 200, for understanding the communicator, please refer to the communication device 220 in the above display device 200, for understanding the microphone, please refer to the sound collector in the detector 230 in the above display device 200, etc. The same content will not be repeated here. The following mainly describes the first processor, the second processor and the microphone of the display device:

[0103] like Figure 6aAs shown, the first processor is configured to execute step S6011: when the display device is wirelessly networked with an external device through a communicator, send first information to the second processor; the first information carries an instruction to restart timing.

[0104] like Figure 6b As shown, the second processor is connected to the first processor and is configured to execute step S6021: upon receiving the first information, restart the timing and return the second information to the first processor.

[0105] like Figure 6a As shown, the first processor is also configured to execute step S6012: upon receiving the second information returned by the second processor, record the current time, start the local timing with the current time as the starting point, and transmit the first audio data with the first timestamp added to it to the external device through the communicator; the first timestamp is obtained based on the local timing.

[0106] In some embodiments, the number of the first timestamps may be one or more, and the specific position in the first audio data corresponding to the first timestamp may be one or more. For example, the first timestamp is added to at least one of the start position, the middle position, and the end position of the audio. The multiple timestamps referred to herein may include two and / or more than two unless otherwise specified.

[0107] like Figure 6c As shown, the microphone is connected to the second processor and is configured to execute step S6031: collect the audio played by the external device and transmit it to the second processor; the second audio data is the audio played by the external device after receiving the first audio data.

[0108] In some embodiments, the microphone is connected to the second processor but not directly connected to the first processor, and the second processor is connected to the first processor, so that the audio collected by the microphone can be transmitted to the first processor via the second processor.

[0109] like Figure 6b As shown, the second processor is further configured to execute step S6022: receive second audio data, add a second timestamp to the second audio data based on the receiving time, and send the second audio data with the second timestamp to the first processor.

[0110] In some embodiments, as described above, similar to the first timestamp, the number of the second timestamps may be one or more, and the specific position in the second audio data corresponding to the second timestamp may be one or more.

[0111] In some embodiments, the second timestamp added by the second processor may be a timestamp determined based on the aforementioned restart of timing. Similarly, the first timestamp may also be a timestamp determined based on the aforementioned restart of timing. Therefore, the first timestamp and the second timestamp correspond to the same start time.

[0112] like Figure 6a As shown, the first processor is further configured to execute step S6013: receiving the second audio data with the second timestamp added thereto returned by the second processor, and determining the distance between the display device and the external device according to the first audio data, the first timestamp, the second audio data and the second timestamp.

[0113] In some embodiments, one or more identical positions corresponding to the first audio data and the second audio data can be determined, for example, the starting position, the ending position, etc. of the audio; at the same time, as mentioned above, since the number of the first timestamp and the second timestamp can be one or more, the first timestamp and the second timestamp corresponding to the above-mentioned identical positions can be determined, so as to determine the distance between the display device and the external device based on the difference between the first timestamp and the second timestamp and combined with the audio propagation speed.

[0114] The first processor and the second processor of the above-mentioned display device realize the time synchronization of the first processor and the second processor through the interaction of the first information and the second information, so that the first timestamp added by the first processor to the audio data sent and the second timestamp added to the audio data returned by the second processor can correspond to the same starting time point, which can avoid the corresponding time error caused by the first processor being unable to directly obtain audio from the microphone of the display device and the time required for the second processor to receive and process the audio collected by the microphone, thereby making the distance between the display device and the external device determined according to the first audio data, the first timestamp, the second audio data and the second timestamp more accurate. In addition, the display device does not need to change its own hardware, does not need to increase the number of microphones or adjust the microphone structure, etc., which improves the corresponding efficiency and reduces costs.

[0115] In one of the embodiments, the first processor is further configured to: when the display device is wirelessly networked with an external device through a communicator, switch the input-output interface to an output mode, send a first level signal to the second processor based on the input-output interface in the output mode, and switch the input-output interface to an input mode after sending the first level signal; the second processor is further configured to: when receiving the first level signal, restart the timing and return a second level signal to the first processor; the first processor is further configured to: based on the input-output interface in the input mode, receive the second level signal returned by the second processor, and when receiving the second level signal, record the current time and start timing on this end with the current time as the starting point.

[0116] In some embodiments, high and low level signals may be used to implement the timing between the first processor and the second processor. For example, a high level signal is used as the first level signal and a low level signal is used as the second level signal.

[0117] In some embodiments, considering that the second processor may need a corresponding transmission time to return the second level signal to the first processor, there may be a corresponding delay between the time when the first processor starts the local timing and the time when the second processor restarts the timing, but the transmission time is short and the impact is small. Of course, in order to further improve the accuracy of ranging, the time when the first processor starts the local timing can be corrected to ensure that the time when the first processor starts the local timing is consistent with the time when the second processor restarts the timing.

[0118] For example, the time when the second processor restarts timing is T0, and the time taken for the second processor to return the second level signal to the first processor is A milliseconds. Accordingly, the time when the first processor receives the second level signal is T0+A milliseconds, that is, the current time=T0+A milliseconds. In this regard, the current time minus A milliseconds can be used as the starting point for the first processor to start timing on the local side, thereby offsetting the corresponding delay.

[0119] Based on the output mode and input mode of the input / output interface, the first processor of the display device notifies the second processor to reset the timing through a first level signal, and receives a second level signal to start the timing on the local side, thereby realizing the time synchronization between the first processor and the second processor. This provides the same starting time point for the subsequent addition of the first timestamp and the second timestamp, thereby helping to more accurately determine the distance between the display device and the external device.

[0120] In one embodiment, the first processor is further configured to: transmit first audio data to an external device through a communicator, the first audio data being square wave audio; and add a first timestamp to a square wave rising edge and / or a square wave falling edge of the first audio data based on local timing.

[0121] The square wave audio may be an audio with a square wave waveform.

[0122] In some possible embodiments, since the first audio data is square wave audio, and the square wave audio may present periodic rises and falls, the first timestamp may be added at the square wave rising edge and / or square wave falling edge of the first audio data.

[0123] Exemplarily, each period of the first audio data may be determined, and a corresponding first timestamp may be added to a rising edge and / or a falling edge of a square wave in each period.

[0124] Since the first audio data is square wave audio, the square wave can quickly switch from one value to another, such as high value to low value, 1 to 0, 0 to 1, etc., which makes the first audio data have corresponding square wave rising edge and square wave falling edge, thereby facilitating the first processor of the display device to add the first timestamp, and also makes the first timestamp accurately correspond to the first audio data, avoiding the situation where the same timestamp corresponds to multiple specific positions or parts of the first audio data, which helps to add the first timestamp more accurately and quickly.

[0125] In one of the embodiments, the first processor is further configured to: map the second timestamp corresponding to the second processor to the third timestamp corresponding to the first processor; fit a corresponding waveform based on the second audio data and the third timestamp; the waveform has a third timestamp corresponding to the peaks and / or troughs of the waveform; determine the time difference between the first timestamp corresponding to the first audio data and the third timestamp corresponding to the waveform; and determine the distance between the display device and the external device based on the time difference and the speed of sound propagation.

[0126] In some embodiments, since the first audio data may have multiple rising edges and / or square wave falling edges, it may correspond to multiple first timestamps; similarly, the waveform may also have multiple third timestamps. Therefore, multiple time differences may be obtained by calculating the time differences between the multiple first timestamps and the multiple third timestamps, and the distance between the display device and the external device may be determined based on the multiple time differences. For example, the distance may be determined by taking the average value of the multiple time differences, or by removing the maximum and minimum values ​​of the multiple time differences and then calculating the average value.

[0127] Exemplarily, the first timestamp corresponding to the first rising edge of the first audio data can be determined as the first timestamp 1; at the same time, the third timestamp corresponding to the first peak of the above waveform can be determined as the third timestamp 1, and then the time difference between the third timestamp 1 and the first timestamp 1 is calculated to determine the above distance.

[0128] In some embodiments, the distance between the display device and the external device determined based on the multiple first timestamps and the multiple third timestamps may be multiple.

[0129] In some embodiments, multiple preliminary distances between the display device and the external device may be determined, and the distance between the display device and the external device may be determined based on the multiple preliminary distances. For example, the determined preliminary distances are 1 meter, 1.5 meters, and 2 meters, and the average of the three distances may be calculated as 1.5 meters, so the distance between the display device and the external device may be determined to be 1.5 meters.

[0130] Since the second timestamp corresponds to the second processor of the display device, by mapping the second timestamp to the third timestamp corresponding to the first processor, and at the same time, by fitting the corresponding waveform based on the second audio data and the third timestamp, the first processor can identify the second audio data and its corresponding time situation, and serve the subsequent steps of determining the time difference; by determining the time difference between the first timestamp and the third timestamp, the time taken for the second audio data to be transmitted from the external device to the display device can be more accurately determined, thereby making the determined distance between the display device and the external device more accurate.

[0131] In one of the embodiments, the first processor is further configured to: determine a distance difference between the distance and a preset distance; when the distance difference is less than the preset difference, determine that the wireless networking between the display device and the external device is valid; when the distance difference is greater than or equal to the preset difference, determine that the wireless networking between the display device and the external device is invalid.

[0132] In some embodiments, as described above, the distance between the display device and the external device can be multiple, and accordingly, multiple distance differences can be obtained; the multiple distance differences can be compared with the preset difference to obtain multiple comparison results, and the validity of the wireless networking invalidation can be comprehensively determined based on the multiple comparison results to improve the accuracy of the above determination.

[0133] Exemplarily, the distances between the display device and the external device are 1 meter, 1.5 meters, and 2 meters. Assuming the preset distance is 1.5 meters, the corresponding distance differences are -0.5 meters, 0 meters, and +0.5 meters. The preset difference is 0.5 meters, so multiple comparison results can be obtained: invalid, valid, and invalid. The number of comparison results representing valid results is less than the number of comparison results representing invalid results. Therefore, it can be determined that the wireless networking between the display device and the external device is invalid.

[0134] By judging whether the wireless networking between the display device and the external device is effective based on the deviation between the determined distance between the display device and the external device and the preset distance, that is, based on the size of the distance difference compared to the preset difference, a judgment on the above-mentioned wireless networking result is provided, which helps to achieve more accurate networking.

[0135] In one embodiment, the first processor is a system-level processor of the display device; and the second processor is a digital signal processor in the display device.

[0136] The system-level processor of the display device may correspond to a system-level chip, which may be a SOC chip installed on a mainboard of the display device; and the digital signal processor may be a DSP chip.

[0137] In some possible embodiments, the second processor may not be integrated into the system-on-chip of the display device.

[0138] In one embodiment, the input / output interface is a general-purpose input / output interface. In some embodiments, the general-purpose input / output interface may be a GPIO, ie, General-purpose input / output.

[0139] In one of the embodiments, the microphone is further configured to transmit second audio data to the second processor based on pulse density modulation.

[0140] Among them, pulse density modulation can be PDM, Pulse Density Modulation, a modulation method that uses binary numbers 0 and 1 to represent analog signals.

[0141] In some embodiments, the microphone may be a digital microphone, such as a PDM microphone, which may convert the collected audio into a digital signal.

[0142] In addition to the above display device, the present application also provides a wireless networking distance measurement method. In one embodiment, a wireless networking distance measurement method is provided, which is applied to a first processor of a display device. The method may include steps S701 to S704:

[0143] Step S701: When the communicator of the display device is wirelessly networked with an external device, a first message is sent to a connected second processor; the first message carries an instruction to restart timing;

[0144] Step S702: when receiving the second information returned by the second processor, record the current time, start timing at the local end with the current time as the starting point, and transmit the first audio data with the first timestamp added to the external device through the communicator; the first timestamp is obtained based on the timing at the local end; the second information is returned by the second processor when receiving the first information and restarting the timing;

[0145] Step S703: receiving the second audio data returned by the second processor and added with the second timestamp; the second audio data corresponds to the audio played by the external device after receiving the first audio data; the second audio data is collected by the microphone of the display device and returned by the second processor after adding the second timestamp;

[0146] Step S704: determining the distance between the display device and the external device according to the first audio data, the first timestamp, the second audio data and the second timestamp.

[0147] The first processor of the above-mentioned display device realizes the time synchronization with the second processor in the same display device by sending the first information and receiving the second information; based on the time synchronization, the first timestamp is added to the first audio data sent, and the second audio data with the second timestamp added is received and returned by the second processor; since the second audio data is received and played by the external device based on the first audio data, and the second timestamp is added by the second processor based on the audio data reception time when the time synchronization is completed, the difference between the first timestamp and the second timestamp can more accurately reflect the time taken for the audio to be transmitted from the external device to the display device, avoiding the corresponding time error caused by the first processor being unable to directly obtain the audio from the microphone, the second processor receiving and processing the microphone audio acquisition time, etc. Furthermore, the first processor can determine a more accurate distance between the display device and the external device based on the first audio data, the first timestamp, the second audio data and the second timestamp.

[0148] In one embodiment, a wireless networking distance measurement method is provided, which is applied to a second processor of a display device. The method may include steps S801 to S802:

[0149] Step S801: when the display device and the external device are wirelessly networked, if the first information sent by the first processor of the display device is received, the timing is restarted, and the second information is returned to the first processor; the first information carries an instruction to restart the timing; the second information is used to instruct the first processor to record the current time when the second information is received, and start the local timing with the current time as the starting point, so as to transmit the first audio data with the first timestamp added to the external device; the first timestamp is obtained based on the local timing of the first processor;

[0150] Step S802: Receive the second audio data collected by the microphone of the display device, add a second timestamp to the second audio data based on the receiving time, and send the second audio data with the second timestamp to the first processor; the second audio data is the audio played by the external device after receiving the first audio data.

[0151] The second processor of the above-mentioned display device realizes time synchronization with the first processor in the display device by receiving the first information and sending the second information; based on the time synchronization, a second timestamp is added to the second audio data collected by the received microphone and transmitted to the first processor; since the second audio data is received and played by the external device after receiving the first audio data, and the second timestamp is added by the second processor when the time synchronization is completed, the second timestamp can more accurately reflect the time when the audio is transmitted to the display device, avoiding the corresponding time error caused by the first processor being unable to directly obtain audio from the microphone, the second processor needing time to receive and process the audio collected by the microphone, etc., which helps to determine a more accurate distance between the display device and the external device.

[0152] In an exemplary embodiment, the example of an external device being a wireless speaker network is used for explanation. The wireless networked speakers need to be calibrated for distance measurement to optimize the audio effect. The existing distance measurement calibration scheme is that the speaker plays a test audio signal, and after the microphone of the display device receives the signal, the distance of each speaker is determined by calculating the return time of the sound wave signal. However, since the microphone array connected to the DSP chip and the mainboard SOC chip cannot directly obtain the recording data from the microphone, the audio signal processing time during DSP is unstable and cannot be offset by a fixed value, etc., this affects the accuracy of calculating the distance based on measuring the time difference of the sound wave from the speaker to the device. In view of this, a wireless networking distance measurement method is provided for display devices such as televisions that have microphone arrays connected to DSP chips. Fig. 9 As shown, a possible process diagram of the wireless networking ranging method is given. The following is an explanation of the relevant process:

[0153] 1) The networked speakers on the motherboard SOC start to calibrate, and the motherboard SOC can synchronize time with the DSP chip.

[0154] like Fig.10 As shown, a possible specific implementation method for time synchronization is provided; Fig.11 As shown, a possible framework diagram of SOC and DSP chip synchronization is provided. In the figure, PCM refers to Pulse Code Modulation (Pulse Code Modulation), and the DSP timestamp may correspond to the second timestamp.

[0155] The motherboard SOC can set the GPIO to output mode, input a high level to notify the DSP chip, and then set the GPIO to input mode. Fig.11 GPIO synchronization notification in.

[0156] 2) The DSP chip receives the GPIO high-level notification, clears the reset timer, and the GPIO notifies the SOC of the low-level signal. Fig.11 GPIO timing feedback in.

[0157] 3) The mainboard SOC receives the GPIO low-level signal and records the SOC time point as the DSP chip synchronization time point.

[0158] The high level may correspond to the first level signal mentioned above, and the low level signal may correspond to the second level signal.

[0159] 4) The mainboard SOC sends the square wave audio (first audio data) required for distance measurement to the speaker, and adds timestamp information at the rising point and falling point (or rising edge and falling edge) of the square wave audio as the first timestamp. For example, the timestamp can be added based on the synchronization time point. When the speaker receives the square wave audio and plays it, the microphone of the display device can collect the corresponding audio and transmit it to the DSP chip.

[0160] 5) The DSP chip receives the audio transmitted by the microphone PDM, adds corresponding timestamp information to each packet of audio data as the second timestamp, and then sends it to the signal processing module.

[0161] 6) After the DSP chip completes the signal processing, the audio is sent to the SOC chip, which corresponds to the first processor receiving the second audio data with the second timestamp added.

[0162] 7) The SOC chip parses the recorded audio and timestamps, and maps the DSP chip timestamp to the SOC chip timestamp. This corresponds to "mapping the second timestamp corresponding to the second processor to the third timestamp corresponding to the first processor" and other related content.

[0163] 8) The SOC chip fits a sine wave with timestamp information. Compare the timestamps of the peaks and troughs of the audio wave with the timestamps of the rising and falling edges of the square wave during playback, and calculate the average time difference.

[0164] 9) Based on the average time difference and the sound propagation speed, for example, the sound propagation speed can be taken as 340 m / s, and the product of the average time difference and the sound propagation speed can be calculated to obtain the distance between the speaker and the SOC chip, that is, the distance between the external device and the display device.

[0165] 10) Compare the above distance with the recommended value (i.e. the preset difference) to determine the difference between the two. If the difference is less than the rated value, it can be determined that the networking distance is valid and a corresponding prompt is issued to the user; conversely, if the difference is greater than or equal to the rated value, it can be determined that the networking distance is invalid and the user is prompted to adjust the distance and recalibrate the network.

[0166] The above technical solution can correct the time error caused by hardware limitations such as the DSP chip connecting to the microphone and the SOC chip being unable to directly obtain audio from the microphone by aligning the mainboard SOC and the DSP chip, adding a timestamp to the mainboard SOC, and adding a timestamp to the DSP recording, thereby achieving more accurate wireless networking distance measurement. At the same time, for the hardware structure of the DSP chip connecting to the microphone, the above technical solution can be an optimization of the display device based on the software solution to improve the accuracy of networking distance measurement, without the need to increase the number of microphones or adjust the microphone structure. In particular, for products such as televisions that have already been on the market, the hardware is already fixed. Compared with the method of changing the hardware, the technical solution of this application has the advantages of high efficiency and low cost.

[0167] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0168] Based on the same inventive concept, the embodiment of the present application also provides a wireless networking ranging device for implementing the wireless networking ranging method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more wireless networking ranging device embodiments provided below can refer to the limitations of the wireless networking ranging method above, and will not be repeated here.

[0169] In an exemplary embodiment, a wireless networking distance measurement device is provided, which is applied to a first processor of a display device, including:

[0170] An audio transmission module is used to send a first message to a connected second processor when wireless networking is performed with an external device through a communicator of a display device; the first message carries an instruction to restart timing; when receiving the second message returned by the second processor, record the current time, start timing on the local end with the current time as the starting point, and transmit first audio data with a first timestamp added to it to the external device through the communicator; the first timestamp is obtained based on timing on the local end; the second message is returned by the second processor when the first message is received and timing is restarted;

[0171] An audio receiving module is used to receive second audio data added with a second timestamp and returned by the second processor; the second audio data corresponds to the audio played by the external device after receiving the first audio data; the second audio data is collected by the microphone of the display device and returned after adding a second timestamp through the second processor;

[0172] The distance determination module is used to determine the distance between the display device and the external device according to the first audio data, the first timestamp, the second audio data and the second timestamp.

[0173] In an exemplary embodiment, a wireless networking distance measurement device is provided, which is applied to a first processor of a display device, including:

[0174] A first receiving module is used for restarting timing and returning second information to the first processor when receiving first information sent by the first processor of the display device in the case where the display device and the external device are wirelessly networked; the first information carries an instruction to restart timing; the second information is used to instruct the first processor to record the current time and start the local timing with the current time as the starting point when receiving the second information, so as to transmit the first audio data with the first timestamp added to it to the external device; the first timestamp is obtained based on the local timing of the first processor;

[0175] The second receiving module is used to receive the second audio data collected by the microphone of the display device, add a second timestamp to the second audio data based on the receiving time, and send the second audio data with the second timestamp to the first processor; the second audio data is the audio played after the external device receives the first audio data.

[0176] Each module in the wireless networking distance measurement device can be implemented in whole or in part by software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each module.

[0177] In an exemplary embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above-mentioned method embodiments when executing the computer program.

[0178] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0179] In one embodiment, a computer program product is provided, including a computer program, which implements the steps in the above method embodiments when executed by a processor.

[0180] In one embodiment, a processor is provided, which is used to execute a computer program to implement the steps in the above method embodiments.

[0181] In one embodiment, a chip is provided. The chip includes the processor in the above embodiment.

[0182] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0183] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0184] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A display device, characterized in that: include: a display configured to display images from the broadcast system and / or from a network; A communicator configured to connect to a wired network and / or a wireless network; The first processor is configured to: when the display device is wirelessly networked with the external device through the communicator, send first information to the second processor; the first information carries an instruction to restart the timing; A second processor is connected to the first processor and is configured to: restart timing and return second information to the first processor when receiving the first information; The first processor is further configured to: upon receiving the second information returned by the second processor, record the current time, start timing on the local end with the current time as the starting point, and transmit the first audio data with the first timestamp added to it to the external device through the communicator; The first timestamp is obtained based on the local end timing; a microphone connected to the second processor and configured to: collect the audio played by the external device and transmit second audio data to the second processor; the audio played by the external device is the audio played by the external device after receiving the first audio data; The second processor is further configured to: receive the second audio data, add a second timestamp to the second audio data based on a receiving time, and send the second audio data with the second timestamp added to the first processor; The first processor is further configured to: receive the second audio data to which the second timestamp is added, and determine the distance between the display device and the external device according to the first audio data, the first timestamp, the second audio data, and the second timestamp.

2. The display device according to claim 1, characterized in that The first processor is further configured to: when the display device is wirelessly networked with an external device through the communicator, switch the input-output interface to an output mode, send a first level signal to the second processor based on the input-output interface in the output mode, and switch the input-output interface to an input mode after sending the first level signal; The second processor is further configured to: restart timing when receiving the first level signal, and return a second level signal to the first processor; The first processor is also configured to: receive the second level signal returned by the second processor based on the input-output interface of the input mode, and upon receiving the second level signal, record the current time and start timing on this end with the current time as the starting point.

3. The display device according to claim 1, characterized in that The first processor is further configured to: transmit the first audio data to the external device through the communicator, where the first audio data is square wave audio data; and add the first timestamp to the rising edge and / or falling edge of the square wave based on the local timing.

4. The display device according to claim 3, characterized in that The first processor is further configured to: Mapping the second timestamp to a third timestamp corresponding to the first processor; According to the second audio data and the third timestamp, a corresponding waveform is obtained by fitting; the peaks and / or troughs in the waveform correspond to the information of the third timestamp; determining a time difference between the first timestamp corresponding to the first audio data and the third timestamp corresponding to the waveform; The distance between the display device and the external device is determined according to the time difference and the sound propagation speed.

5. The display device according to claim 1, characterized in that The first processor is further configured to: Determining a distance difference between the distance and a preset distance; When the distance difference is less than a preset difference, determining that the wireless networking between the display device and the external device is valid; When the distance difference is greater than or equal to a preset difference, it is determined that the wireless networking between the display device and the external device is invalid.

6. The display device according to any one of claims 1 to 5, characterized in that: The first processor is a system-level processor in the display device; The second processor is a digital signal processor in the display device.

7. The display device according to claim 6, characterized in that The input and output interface of the first processor is a general purpose input and output interface.

8. The display device according to any one of claims 1 to 5, characterized in that: The microphone is further configured to transmit the second audio data to the second processor based on pulse density modulation.

9. A wireless networking distance measurement method, characterized in that: A first processor applied to a display device, comprising: When the display device is wirelessly networked with an external device, first information is sent to a connected second processor; the first information carries an instruction to restart timing; When receiving the second information returned by the second processor, the current time is recorded, the local timing is started with the current time as the starting point, and the first audio data with the first timestamp added is transmitted to the external device through the communicator; the first timestamp is obtained based on the local timing; the second information is returned by the second processor when the first information is received and the timing is restarted; receiving second audio data returned by the second processor and to which a second timestamp is added; the second audio data corresponds to the audio played by the external device after receiving the first audio data; the second audio data is collected by the microphone of the display device and returned after being added with a second timestamp by the second processor; A distance between the display device and the external device is determined according to the first audio data, the first timestamp, the second audio data, and the second timestamp.

10. A wireless networking distance measurement method, characterized in that: A second processor applied to a display device, comprising: In the case where the display device and the external device are wirelessly networked, if the first information sent by the first processor of the display device is received, the timing is restarted and the second information is returned to the first processor; the first information carries an instruction to restart the timing; the second information is used to instruct the first processor to record the current time when receiving the second information, and start the local timing with the current time as the starting point, so as to transmit the first audio data with the first timestamp added to it to the external device; the first timestamp is obtained based on the local timing of the first processor; Receive second audio data collected by the microphone of the display device, add a second timestamp to the second audio data based on the receiving time, and send the second audio data with the second timestamp added to the first processor; the second audio data is the audio played by the external device after receiving the first audio data.

Images