Display device and audio signal playing method thereof

Abstract

The application provides a display device and an audio signal playing method thereof. The method comprises the following steps: acquiring audio signals of different channels; dividing a first audio signal into a first sub-signal and a second sub-signal; sending the first sub-signal to a first loudspeaker for playing; performing delay processing on the second sub-signal, merging the delayed second sub-signal with a second audio signal to obtain a first merged signal, and sending the first merged signal to a second loudspeaker for playing. In the application, the first audio signal corresponding to the first loudspeaker is divided to obtain a high-frequency first sub-signal and a low-frequency second sub-signal. The high-frequency sub-signal is distributed to the first loudspeaker for playing, and the low-frequency sub-signal is distributed to the second loudspeaker for playing. Since the second loudspeaker can normally play low-frequency signals, all the contents in the first audio signal can be normally played, thereby improving the sound playing effect of the display device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronics, and in particular to a display device and an audio signal playing method thereof. BACKGROUND

[0002] In order to improve the sense of presence of watching TV, more and more TVs use sky sound speakers to play high-pitched sounds, such as the sound of an airplane flying overhead, thunder, and the like.

[0003] Considering that a special sky sound speaker is not installed on the ceiling when a general family living room is decorated, the TV in the related art generally uses a reflection method, that is, an upward sky sound speaker is installed on the top of the TV, and the sound signal played by the sky sound speaker is transmitted to the ear after being reflected by the ceiling.

[0004] With the increasingly thin design of the TV, the design size of the sky sound speaker is also compressed into a thin design form. However, after the sky sound speaker is designed to be thin, the playing effect of the sky sound speaker on low-frequency signals is weakened, so that the low-frequency signals of the sky sound channel cannot be normally played, such as the engine sound of an airplane, thunder, and the like, thereby causing poor sound playing effect of the TV. SUMMARY

[0005] The present application provides a display device and an audio signal playing method thereof to solve the problems in the related art.

[0006] In a first aspect, the present application provides a display device, comprising:

[0007] a first speaker configured to play audio signals of a first sound channel;

[0008] a second speaker configured to play audio signals of a second sound channel different from the first sound channel;

[0009] a decoder configured to decode signals input by a signal source to obtain a decoding result;

[0010] a controller connected to the first speaker, the second speaker, and the decoder, and configured to:

[0011] obtain audio signals of different sound channels according to the decoding result, wherein the audio signals of the different sound channels include first audio signals allocated to the first speaker and second audio signals allocated to the second speaker;

[0012] divide the first audio signals into first sub-signals and second sub-signals, wherein the frequency of the first sub-signals is greater than a preset frequency, and the frequency of the second sub-signals is less than or equal to the preset frequency;

[0013] sending the first sub-signal to the first speaker for playing;

[0014] delaying the second sub-signal, merging the delayed second sub-signal with the second audio signal to obtain a first merged signal, and sending the first merged signal to the second speaker for playing.

[0015] In some embodiments, in the step of delaying the second sub-signal, the controller is further configured to:

[0016] obtaining a first distance from the first speaker to an object and a second distance from the second speaker to the object;

[0017] determining a delay time according to the first distance and the second distance;

[0018] delaying the second sub-signal according to the delay time.

[0019] In some embodiments, in the step of determining a delay time according to the first distance and the second distance, the controller is further configured to:

[0020] calculating a distance difference between the first distance and the second distance;

[0021] calculating a ratio of the distance difference to a sound propagation speed;

[0022] determining a sum of the ratio and a first preset time as the delay time.

[0023] In some embodiments, in the step of delaying the second sub-signal, the controller is further configured to:

[0024] performing a voice detection on the first audio signal to obtain a detection result;

[0025] when the detection result indicates that the first audio signal includes a voice, determining a second preset time as the delay time and delaying the second sub-signal according to the second preset time.

[0026] In some embodiments, the controller is further configured to:

[0027] when the detection result indicates that the first audio signal does not include a voice, performing an energy detection on the first audio signal;

[0028] If the energy of the first audio signal at the preset frequency is lower than a preset energy value, a third preset time is determined as a delay time, and the second sub-signal is processed by delay according to the third preset time.

[0029] In some embodiments, in the step of dividing the first audio signal into a first sub-signal and a second sub-signal, the controller is further configured to:

[0030] determine a signal valley frequency of the first audio signal;

[0031] when the signal valley frequency is greater than the preset frequency, divide the first audio signal into a new first sub-signal and a new second sub-signal according to the signal valley frequency, the frequency of the new first sub-signal being greater than the signal valley frequency, and the frequency of the new second sub-signal being less than or equal to the signal valley frequency.

[0032] In some embodiments, in the step of sending the first sub-signal to the first loudspeaker for playing, the controller is further configured to:

[0033] perform high-pass filtering and signal gain adjustment processing on the second audio signal, and combine the processed second audio signal with the first sub-signal to obtain a second combined signal;

[0034] send the second combined signal to the first loudspeaker for playing.

[0035] In some embodiments, the controller is further configured to:

[0036] obtain a third audio signal allocated to a third loudspeaker;

[0037] perform delay processing on the third audio signal so that the delayed third audio signal is synchronized with the first combined signal;

[0038] send the delayed third audio signal to the third loudspeaker for playing.

[0039] In some embodiments, the controller is further configured to:

[0040] perform high-pass filtering and signal gain adjustment processing on the third audio signal, and combine the processed third audio signal with the first sub-signal to obtain a third combined signal;

[0041] send the third combined signal to the first loudspeaker for playing.

[0042] In some embodiments, in the step of dividing the first audio signal into a first sub-signal and a second sub-signal, the controller is further configured to:

[0043] inputting the first audio signal into a high-pass filter and a low-pass filter respectively, a signal outputted via the high-pass filter being the first sub-signal, and a signal outputted via the low-pass filter being the second sub-signal;

[0044] wherein the high-pass filter is configured to pass signals with frequencies greater than the preset frequency, and the low-pass filter is configured to pass signals with frequencies less than or equal to the preset frequency.

[0045] In some embodiments, the first audio signal is a sky channel signal, the second audio signal is a main channel signal, and the first audio signal and the second audio signal have the same left and right channel properties.

[0046] In some embodiments, the third audio signal is a center channel signal.

[0047] In a second aspect, the present application provides an audio signal playing method applied to a display device, comprising:

[0048] obtaining audio signals of different channels, the audio signals of different channels including a first audio signal allocated to a first loudspeaker and a second audio signal allocated to a second loudspeaker, wherein the first loudspeaker and the second loudspeaker play audio signals of different channels;

[0049] dividing the first audio signal into a first sub-signal and a second sub-signal, the first sub-signal having a frequency greater than a preset frequency, and the second sub-signal having a frequency less than or equal to the preset frequency;

[0050] sending the first sub-signal to the first loudspeaker for playing;

[0051] delaying the second sub-signal, merging the delayed second sub-signal with the second audio signal to obtain a first merged signal, and sending the first merged signal to the second loudspeaker for playing.

[0052] In a third aspect, the present application provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the above-mentioned audio signal playing method.

[0053] In a fourth aspect, the present application provides a computer readable storage medium, wherein the computer readable storage medium stores computer execution instructions, and the computer execution instructions are executed by a processor to implement the above-mentioned audio signal playing method.

[0054] In a fifth aspect, the present application provides a computer program product, comprising a computer program which, when executed by a processor, implements the audio signal playing method described above.

[0055] The display device and the audio signal playing method thereof provided in the present application, wherein the method comprises: obtaining audio signals of different channels, the audio signals of different channels comprising a first audio signal allocated to a first loudspeaker and a second audio signal allocated to a second loudspeaker, wherein the first loudspeaker and the second loudspeaker play audio signals of different channels; dividing the first audio signal into a first sub-signal and a second sub-signal, the frequency of the first sub-signal being greater than a preset frequency, and the frequency of the second sub-signal being less than or equal to the preset frequency; sending the first sub-signal to the first loudspeaker for playing; performing delay processing on the second sub-signal, merging the delayed second sub-signal with the second audio signal to obtain a first merged signal, and sending the first merged signal to the second loudspeaker for playing. In the present application, for loudspeakers of different channels, when the first loudspeaker cannot play low-frequency signals with a frequency less than the preset frequency, the first audio signal corresponding to the first loudspeaker can be divided to obtain a high-frequency first sub-signal and a low-frequency second sub-signal, the high-frequency sub-signal is allocated to the first loudspeaker for playing, and the low-frequency sub-signal is allocated to the second loudspeaker for playing. Since the second loudspeaker can normally play low-frequency signals, it can be ensured that all the contents in the first audio signal can be normally played, thereby improving the sound playing effect of the display device. BRIEF DESCRIPTION OF DRAWINGS

[0056] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments consistent with the present disclosure and, together with the description, further serve to explain the principles of the present disclosure.

[0057] Figure 1 FIG. 1 is a schematic diagram of a use scenario of a display device according to an embodiment;

[0058] Figure 2 FIG. 2 is a configuration block diagram of a display device according to an exemplary embodiment;

[0059] Figure 3 FIG. 3 is a hardware configuration block diagram of a display device according to an exemplary embodiment;

[0060] Figure 4 FIG. 4 is a software configuration schematic diagram of a display device according to some embodiments;

[0061] Figure 5 FIG. 5 is a schematic diagram of an application scenario of a scheme of an embodiment of the present application;

[0062] Figure 6A diagram of a display device with sky sound speakers according to an embodiment of the application;

[0063] Figure 7 A diagram of a system architecture of a multi-channel display device according to an embodiment of the application;

[0064] Figure 8 A diagram of the effect of different speakers on different frequencies of signals according to an embodiment of the application;

[0065] Figure 9 A diagram of a display device according to an embodiment of the application;

[0066] Figure 10 A diagram of signal processing by a controller according to an embodiment of the application;

[0067] Figure 11 A diagram of a signal chain architecture of a multi-channel display device according to an embodiment of the application;

[0068] Figure 12 A diagram of another scenario according to an embodiment of the application;

[0069] Figure 13 A diagram of the spectral characteristics of signals of a first speaker and a second speaker according to an embodiment of the application;

[0070] Figure 14 A diagram of test results obtained at the moment when full frequency pink noise is started to be played on a channel of a first audio signal according to an embodiment of the application;

[0071] Figure 15 A diagram of a signal of a human voice according to an embodiment of the application;

[0072] Figure 16 A diagram of an example of a signal according to an embodiment of the application;

[0073] Figure 17 A diagram of signal processing by a processor according to an embodiment of the application;

[0074] Figure 18 A diagram of signal processing by a processor according to an embodiment of the application;

[0075] Figure 19 A diagram of signal processing by a processor according to an embodiment of the application;

[0076] Figure 20 A diagram of signal processing by a processor according to an embodiment of the application;

[0077] Figure 21 A diagram of an audio signal playing method according to an embodiment of the application.

[0078] The specific embodiments of the present disclosure have been shown through the above-described drawings, and will be described in more detail hereinafter. These drawings and written description are not intended to restrict the scope of the present disclosure by any means, but to illustrate the concept of the present disclosure to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0079] For the purpose of making the present application and its implementation more clear, the exemplary implementation of the present application will be described clearly and completely below in combination with the drawings of the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only some of the embodiments of the present application, but not all the embodiments.

[0080] It should be noted that the brief description of the terms in the present application is only for the convenience of understanding the implementation described hereinafter, but is not intended to limit the implementation of the present application. Unless otherwise specified, these terms should be understood according to their ordinary and general meanings.

[0081] The terms "first", "second", "third" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar or similar objects or entities, but do not necessarily mean to limit the specific order or sequence, unless otherwise specified. It should be understood that the terms used in this way can be interchanged under appropriate circumstances.

[0082] The terms "include" and "have" and any variations thereof are intended to cover but not exclusive inclusion, for example, a product or device including a series of components does not have to be limited to all the components listed clearly, but can include other components not listed clearly or inherent to these products or devices.

[0083] The term "module" refers to any known or later developed hardware, software, firmware, artificial intelligence, fuzzy logic or combination of hardware or / and software code capable of performing functions related to the element.

[0084] Figure 1 The figure shows the use scenario of the display device in the embodiment. As shown in Figure 1 The display device 200 also communicates data with the server 400, and the user can operate the display device 200 through the smart device 300 or the control device 100.

[0085] In some embodiments, the control device 100 can be a remote controller, and the communication between the remote controller and the display device includes at least one of infrared protocol communication or Bluetooth protocol communication, and other short-distance communication methods, to control the display device 200 by wireless or wired means. The user can input user instructions through at least one of the keys on the remote controller, voice input, control panel input, etc. to control the display device 200.

[0086] In some embodiments, the smart device 300 can include any one of a mobile terminal, a tablet, a computer, a notebook, an AR / VR device, etc.

[0087] In some embodiments, the smart device 300 can also be used to control the display device 200. For example, the display device 200 is controlled using an application running on the smart device.

[0088] In some embodiments, the smart device 300 and the display device can also be used for data communication.

[0089] In some embodiments, the display device 200 can also be controlled in ways other than the control device 100 and the smart device 300, for example, the display device 200 can directly receive voice instructions from the user through a voice instruction receiving module configured inside the display device 200, or the display device 200 can receive voice instructions from the user through a voice control device configured outside the display device 200.

[0090] In some embodiments, the display device 200 also communicates data with the server 400. The display device 200 can be communicatively connected through a local area network (LAN), a wireless local area network (WLAN), and other networks. The server 400 can provide various content and interactions to the display device 200. The server 400 can be a cluster or multiple clusters, and can include one or more types of servers.

[0091] In some embodiments, software steps performed by one step execution subject can be migrated to another step execution subject in data communication therewith for execution as needed. For example, software steps performed by the server can be migrated to the display device in data communication therewith for execution as needed, and vice versa.

[0092] Figure 2 An exemplary configuration block diagram of the control device 100 according to an exemplary embodiment is shown. As shown, the control device 100 includes a controller 110, a communication interface 130, a user input / output interface 140, a memory, and a power supply. The control device 100 can receive input operation instructions from the user and convert the operation instructions into instructions recognizable and responsive by the display device 200, thereby serving as an intermediary for interaction between the user and the display device 200. Figure 2

[0093] In some embodiments, the communication interface 130 is used for external communication and includes at least one of a WIFI chip, a Bluetooth module, an NFC or an alternative module.

[0094] In some embodiments, the user input / output interface 140 includes at least one of a microphone, a touchpad, a sensor, a key, or an alternative module. ​

[0095] Figure 3 A hardware configuration block diagram of the display device 200 according to an exemplary embodiment is shown.

[0096] In some embodiments, the display device 200 includes at least one of a tuner and demodulator 210, a communicator 220, a detector 230, an external device interface 240, a controller 250, a display 260, an audio output interface 270, a storage, a power supply, a user interface.

[0097] In some embodiments, the controller includes a central processing unit, a video processor, an audio processor, a graphic processor, a RAM, a ROM, a first interface to an n-th interface for input / output.

[0098] In some embodiments, the display 260 includes a display screen component for presenting a picture, and a driving component for driving the image display, a component for receiving an image signal originated from the controller output, and displaying video content, image content, and a menu operation interface, and a user operation UI interface, etc.

[0099] In some embodiments, the display 260 can be at least one of a liquid crystal display, an OLED display, and a projection display, and can also be a projection device and a projection screen.

[0100] In some embodiments, the tuner and demodulator 210 receives a broadcast television signal through a wired or wireless receiving manner, and demodulates audio and video signals, such as EPG data signals, from a plurality of wireless or wired broadcast television signals.

[0101] In some embodiments, the communicator 220 is a component for communicating with external devices or servers according to various communication protocol types. For example, the communicator can include at least one of a Wifi module, a Bluetooth module, a wired Ethernet module, other network communication protocol chips or near field communication protocol chips, and an infrared receiver. The display device 200 can establish transmission and reception of control signals and data signals with the control device 100 or the server 400 through the communicator 220.

[0102] In some embodiments, the detector 230 is used to collect signals of external environment or interaction with the outside. For example, the detector 230 includes a light receiver, a sensor for collecting ambient light intensity, or an image collector such as a camera, which can be used to collect external environment scenes, user attributes or user interaction gestures, or a sound collector such as a microphone, which is used to receive external sound.

[0103] In some embodiments, the external device interface 240 can include, but is not limited to, any one or more of a High-Definition Multimedia Interface (HDMI), an analog or digital High-Definition Component Input Interface (Component), a Composite Video Input Interface (CVBS), a USB Input Interface (USB), an RGB port, etc. It can also be a composite input / output interface formed by a plurality of the above interfaces.

[0104] In some embodiments, the controller 250 and the tuner demodulator 210 can be located in different separate devices, i.e., the tuner demodulator 210 can also be located in an external device of the main device where the controller 250 is located, such as an external set-top box, etc.

[0105] In some embodiments, the controller 250 controls the operation of the display device and the response to user operations by storing various software control programs in the memory. The controller 250 controls the overall operation of the display device 200. For example, in response to receiving a user command for selecting a UI object displayed on the display 260, the controller 250 can perform an operation related to the object selected by the user command.

[0106] In some embodiments, the object can be any one of selectable objects, such as a hyperlink, an icon, or other operable control. The operation related to the selected object can be an operation of displaying a page connected to a hyperlink, a document, an image, etc., or an operation of executing a program corresponding to the icon.

[0107] In some embodiments, the controller includes at least one of a Central Processing Unit (CPU), a video processor, an audio processor, a Graphics Processing Unit (GPU), a RAM (Random Access Memory), a ROM (Read-Only Memory), a first to n-th interface for input / output, a communication bus, etc.

[0108] The CPU processor is configured to execute operating system and application program instructions stored in the memory, and to execute various application programs, data, and content according to various interaction instructions received from external input, so as to finally display and play various audio / video content. The CPU processor can include a plurality of processors. For example, it can include one main processor and one or more sub-processors.

[0109] In some embodiments, the graphics processor is configured to generate various graphical objects, such as at least one of an icon, an operation menu, and a display pattern of a user input instruction. The graphics processor includes an operation unit configured to perform an operation by receiving various interaction instructions from a user, and display various objects according to display attributes; and a renderer configured to perform rendering on the various objects obtained based on the operation unit, and the rendered objects are used for display on a display.

[0110] In some embodiments, the video processor is configured to receive an external video signal, and perform at least one of decompression, decoding, scaling, noise reduction, frame rate conversion, resolution conversion, and image synthesis on the input signal according to a standard codec protocol, to obtain a signal directly displayable on the display device 200.

[0111] In some embodiments, the video processor includes at least one of a demultiplexing module, a video decoding module, an image synthesizer, a frame rate conversion module, and a display formatting module. The demultiplexing module is configured to perform demultiplexing processing on an input audio / video data stream. The video decoding module is configured to perform processing, such as decoding and scaling, on the demultiplexed video signal. The image synthesizer is configured to perform superimposition and mixing processing on a video image processed by the scaling on the GUI signal generated by the graphics generator according to a user input or itself, to generate an image signal displayable. The frame rate conversion module is configured to convert the frame rate of an input video. The display formatting module is configured to change a signal, such as an output RGB data signal, to a signal conforming to a display format, on the basis of the video signal output after the frame rate conversion.

[0112] In some embodiments, the audio processor is configured to receive an external audio signal, and perform at least one of decompression and decoding, and processing, such as noise reduction, digital-to-analog conversion, and amplification, on the input signal according to a standard codec protocol, to obtain a sound signal playable on a speaker.

[0113] In some embodiments, the user can input a user command through a graphical user interface (GUI) displayable on the display 260, and the user input interface receives the user input command through the graphical user interface (GUI). Alternatively, the user can input a user command through input of a specific sound or gesture, and the user input interface receives the user input command by recognizing the sound or gesture through a sensor.

[0114] In some embodiments, a "user interface" is a medium interface between an application program or an operating system and a user for interaction and information exchange, which realizes the conversion between the internal form of information and the form that the user can accept. The commonly used form of the user interface is a graphic user interface (GUI), which refers to a user interface related to computer operation displayed in a graphical manner. It can be an icon, a window, a control, etc. displayed on the display screen of an electronic device, wherein the control can include at least one of the following visual interface elements: an icon, a button, a menu, a tab, a text box, a dialog box, a status bar, a navigation bar, a widget, etc.

[0115] In some embodiments, the user interface 280 is an interface (e.g., a physical button on the body of the display device, or the like) that can be used to receive a control input.

[0116] In some embodiments, the system of the display device can include a kernel, a shell, a file system, and an application program. The kernel, the shell, and the file system together form a basic operating system structure, which allows a user to manage files, run programs, and use the system. After power-on, the kernel is started, the kernel space is activated, the hardware is abstracted, the hardware parameters are initialized, the virtual memory is run and maintained, the scheduler, the signal, and the inter-process communication (IPC) are maintained. After the kernel is started, the shell and the user application program are loaded. The application program is compiled into machine code after being started, forming a process.

[0117] Referring to Figure 4 In some embodiments, the system is divided into four layers from top to bottom, namely, an application layer (referred to as "application layer" for short), an application framework layer (referred to as "framework layer" for short), an Android runtime and system library layer (referred to as "system runtime library layer" for short), and a kernel layer.

[0118] In some embodiments, at least one application program is run in the application layer, which can be a window (Window) program, a system setting program, or a clock program, etc. provided by the operating system; or an application program developed by a third-party developer. In a specific implementation, the application program package in the application layer is not limited to the above examples.

[0119] The framework layer provides application programming interfaces (APIs) and programming frameworks for applications in the application layer. The application framework layer includes some pre-defined functions. The application framework layer is equivalent to a processing center that decides which application in the application layer to act. The application accesses resources in the system and obtains services of the system through the API interface during execution.

[0120] As shown in Figure 4 The application framework layer in the embodiments of the present application includes managers (Managers) and content providers (Content Provider), wherein the managers include at least one of the following modules: an activity manager (ActivityManager) for interacting with all activities running in the system; a location manager (Location Manager) for providing access to system location services for system services or applications; a package manager (Package Manager) for retrieving various information related to application packages currently installed on the device; a notification manager (NotificationManager) for controlling the display and clearing of notification messages; and a window manager (Window Manager) for managing icons, windows, toolbars, wallpapers, and desktop components on the user interface.

[0121] In some embodiments, the activity manager is used to manage the life cycle of each application and general navigation back function, such as controlling the exit, opening, back, and the like of the application. The window manager is used to manage all window programs, such as obtaining the size of the display screen, determining whether there is a status bar, locking the screen, intercepting the screen, controlling the display window change (for example, reducing the display window, shaking the display, twisting the display, and the like), and the like.

[0122] In some embodiments, the system runtime library layer provides support for the upper layer, i.e., the framework layer. When the framework layer is used, the Android operating system runs the C / C++ library included in the system runtime library layer to realize the functions of the framework layer.

[0123] In some embodiments, the kernel layer is a layer between hardware and software. As shown in Figure 4 The kernel layer includes at least one of the following drivers: an audio driver, a display driver, a Bluetooth driver, a camera driver, a WIFI driver, a USB driver, an HDMI driver, a sensor driver (such as a fingerprint sensor, a temperature sensor, a pressure sensor, and the like), and a power supply driver, and the like.

[0124] First, the application scenarios involved in the present application are explained and described:

[0125] Figure 5 This is a schematic diagram of an application scenario of the solution of the embodiment of the present application, such as Figure 5 As shown, in order to enhance the immersive experience of watching movies on display devices, more and more display devices or audio equipment use sky sound speakers to play back sounds with a sense of height. For example, the sound of airplanes flying overhead or thunder. These sounds should originally be produced by speakers or sound boxes installed on the roof. However, since this requirement is not taken into account when decorating the living room of most homes, there are no speakers or sound boxes installed on the roof. Therefore, the display devices in the related art all use a reflective method to achieve this. That is, an upward-facing sky sound speaker is installed on the top of the display device. The sound waves emitted by the sky sound speaker are reflected by the roof ceiling and then transmitted to the human ear.

[0126] Figure 6 Schematic diagram of a display device provided with a sky sound speaker according to an embodiment of the present application. Figure 6 As shown, the display device includes a display (display screen) and a speaker.

[0127] Among them, the display includes a screen configured to present an image and a shell configured to support the screen, wherein the screen and the shell are surrounded by a hollow area; the speaker is arranged in the hollow area, and includes a vibrating member configured to vibrate and produce sound, and a cavity whose bottom is sealedly connected to the vibrating member and faces the outside of the hollow area, wherein the cavity includes a first part and a second part that cooperate with each other parallel to the screen image, the bottom of the first part is sealedly connected to the vibrating member and the cross-section of the first part taken along the axial direction of the channel of the first part is rectangular, and the second part gradually expands outward to be horn-shaped.

[0128] refer to Figure 6 The speakers specifically include a sky sound speaker arranged at the top of the display, specifically including a left sky sound speaker S1 and a right sky sound speaker S2; in addition, the speakers also include a main channel speaker, specifically including a left channel speaker S3 and a right channel speaker S4; in addition, the speakers also include a center channel speaker S5.

[0129] Figure 7 This is a schematic diagram of the system architecture of the multi-channel display device according to an embodiment of the present application. Figure 7 As shown, the system architecture includes a left channel, a right channel, a center channel, a left sky sound channel and a right sky sound channel.

[0130] refer to Figure 6 and Figure 7For a conventional multi-channel and sound effect processing architecture, a left sky sound channel signal is played by a left sky sound speaker S1, a right sky sound channel signal is played by a right sky sound speaker S2, a left channel signal is played by a left channel speaker S3, a right channel signal is played by a right channel speaker S4, and a center channel signal is played by a center channel speaker S5.

[0131] A multi-channel display device can significantly improve the sense of presence experience of watching a movie, but because of the use of multiple speakers, the display device is thick, especially the top of a general display device is generally designed to be thin, and after the use of sky sound speakers, the appearance is poor in aesthetic appearance. In order to solve this problem, the general related technical means is to adopt a super-thin design for the sky sound speaker, and the other speakers are all designed normally (i.e., the display device in the related art presents a thin top and thick bottom form).

[0132] The signal of each channel can contain full-band (20-20kHz) sound, such as the sky sound signal containing high-frequency signals such as bird calls and low-frequency signals such as common thunder and helicopter sounds. After adopting a super-thin design, the sky sound speaker will have a reduced playing effect on low-frequency signals.

[0133] Figure 8 The schematic diagram of the playing effect of different speakers of the embodiment of the present application on different frequency signals is shown in FIG. 1, wherein the lower the loudness, the worse the sound playing effect, such as Figure 8 As shown in FIG. 1, a speaker with a regular thickness can normally play full-band sound, while a super-thin speaker has poor low-frequency response due to the limited width of the diaphragm, so it cannot play back low-frequency sound. This will result in the failure to normally play the low-frequency sound originally contained in the sky sound, such as airplane engine sound and thunder, which will result in poor sound playing effect of the display device and poor user experience.

[0134] For example, Figure 8 As shown in FIG. 2, the super-thin speaker has a good playing effect on signals with a frequency of 1000Hz or above, but has a poor playing effect on signals with a frequency of 1000Hz or below.

[0135] The display device and the audio signal playing method provided by the present application are intended to solve the above technical problems of the related art, and the present application mainly realizes the processing of audio signals played by different speakers through a software algorithm, so as to ensure that the audio signals distributed to each speaker can be normally played.

[0136] The technical solutions of the present application and how the technical solutions of the present application solve the above technical problems will be described in detail below with specific examples. The following specific examples can be combined with each other, and the same or similar concepts or processes can not be described again in some examples. The embodiments of the present application will be described below with reference to the accompanying drawings.

[0137] In some embodiments, a display device is provided, Figure 9 For the schematic diagram of the display device in the embodiments of the present application, as Figure 9 shown, the display device comprises a first speaker, a second speaker, a decoder, and a controller connected to the first speaker, the second speaker, and the decoder, respectively.

[0138] The first speaker is configured to play an audio signal of a first channel; the second speaker is configured to play an audio signal of a second channel different from the first channel.

[0139] Specifically, the first channel can be a sky sound channel, and the second channel can be a main channel, such as a left channel and a right channel, and the corresponding first speaker is a sky sound channel speaker, and the second speaker is a left / right channel speaker.

[0140] In addition, in the technical solutions of the present application, the first channel and the second channel have the same left and right channel attributes. That is, when the first channel is a left sky sound channel, the second channel is a left channel, and the corresponding first speaker is a left sky sound channel speaker, and the second speaker is a left channel speaker; and when the first channel is a right sky sound channel, the second channel is a right channel, and the corresponding first speaker is a right sky sound channel speaker, and the second speaker is a right channel speaker, to prevent the sound of the left and right channels from being confused.

[0141] The decoder is configured to decode the signal input by the signal source to obtain a decoding result.

[0142] The signal source is a signal source of the display device, such as HDMI (High Definition Multimedia Interface), DTV (Digital Television), network, and mobile storage medium. The audio stream in these signal sources will be decoded by the decoder, and the format input by the decoder is the original format of each signal source, such as 7.1 channel, 5.1 channel, and 2.0 channel. These streams are then sent to the controller of the display device.

[0143] In the present embodiment, the controller is configured to perform the following steps:

[0144] S100, the controller acquires the decoding result sent by the decoder, and acquires audio signals of different channels according to the decoding result, wherein the audio signals of different channels include a first audio signal allocated to the first loudspeaker and a second audio signal allocated to the second loudspeaker, and the channel types of the first audio signal and the second audio signal are different;

[0145] S200, the controller divides the first audio signal into a first sub-signal and a second sub-signal, wherein the frequency of the first sub-signal is greater than a preset frequency, and the frequency of the second sub-signal is less than or equal to the preset frequency, that is, the controller performs signal separation on the original first audio signal according to the frequency size to obtain sub-signals of different frequencies;

[0146] S300, the controller sends the first sub-signal to the first loudspeaker for playing, since the playing effect of the first loudspeaker on low-frequency signals is poor, the controller sends the first sub-signal with higher frequency to the first loudspeaker for playing, so as to ensure the sound playing effect of high-frequency signals;

[0147] S400, the second sub-signal is processed by time delay, and the second sub-signal after time delay is combined with the second audio signal to obtain a first combined signal, and the first combined signal is sent to the second loudspeaker for playing, since the playing effect of the second loudspeaker on low-frequency signals and high-frequency signals is good, the second sub-signal with lower frequency in the first audio signal can be allocated to the second loudspeaker for playing, so as to ensure the sound playing effect of low-frequency signals.

[0148] Specifically, the first audio signal allocated to the first loudspeaker can be a sky sound channel signal, and the second audio signal allocated to the second loudspeaker can be a left / right channel signal.

[0149] Specifically, for the sky sound channel loudspeaker of ultra-thin design, that is, the first loudspeaker in the embodiment, since the playing effect of the first loudspeaker on low-frequency signals in the first audio signal is poor, and the low-frequency signals in the first audio signal also need to be played, the scheme adopted in the embodiment is to allocate the part of low-frequency signals to the second loudspeaker which can normally play low-frequency signals, so as to ensure that all sounds in the first audio signal can be normally played. The preset frequency can be set to 1000Hz.

[0150] Figure 10 The schematic diagram of the controller for signal processing in the embodiment of the application is shown in Figure 10 For the audio signal flowing into the controller, the controller first divides the frequency of the first audio signal to obtain the first sub-signal and the second sub-signal, and the processing process can be realized by the frequency allocation module in the controller.

[0151] The frequency of the first sub-signal is greater than the preset frequency, i.e., the first sub-signal is a high-frequency signal, indicating that the first sub-signal can be normally played by the first loudspeaker; and the frequency of the second sub-signal is less than or equal to the preset frequency, i.e., the second sub-signal is a low-frequency signal, indicating that the second sub-signal cannot be normally played by the first loudspeaker and needs to be distributed to the second loudspeaker for playing. After obtaining the first sub-signal and the second sub-signal, the first sub-signal is sent to the first loudspeaker for playing, and the second sub-signal is sent to the second loudspeaker for playing.

[0152] When the second sub-signal is sent to the second loudspeaker for playing, the second sub-signal is first processed by a delay module in the controller to ensure signal synchronization, then the processed second sub-signal is combined with the second audio signal to obtain a first combined signal, and the first combined signal is sent to the second loudspeaker for playing. Thus, the first combined signal includes the second sub-signal (i.e., the low-frequency signal) in the first audio signal, and therefore all sounds in the first audio signal can be normally played.

[0153] In some embodiments, when the signal is sent to the loudspeaker for playing, the signal can be power-amplified by a power amplifier, and then the amplified signal is sent to the corresponding loudspeaker.

[0154] For example, when the first sub-signal is sent to the first loudspeaker for playing, the first sub-signal can be signal-amplified by a first power amplifier, and then the amplified first sub-signal is sent to the first loudspeaker.

[0155] Similarly, when the first combined signal is sent to the second loudspeaker for playing, the first combined signal can be signal-amplified by a second power amplifier, and then the amplified first combined signal is sent to the second loudspeaker.

[0156] Figure 11 A schematic diagram of the signal chain architecture of the multi-channel display device of the embodiments of the present application is shown in FIG. 1. Figure 11 As shown in FIG. 1, the HDMI, the DTV, the network, and the mobile storage medium are all signal sources of the display device. The audio code streams in these signal sources are decoded by a decoder. The input format of the decoder is the original format of each signal source. These code streams then enter a channel mapping module in the display device controller, and the number of channels is calculated by the channel mapping module to a fixed format, such as a 3.0.2 format. Subsequently, these signals enter a timbre adjustment module in the controller, and the algorithm of the timbre adjustment module is adjusted for each channel signal. Then, the 3.0.2 signal stream enters a loudspeaker mapping module in the controller, and the loudspeaker mapping module is remapped and distributed according to the characteristics of the rear-end loudspeakers, i.e., the execution of the loudspeaker mapping module is as follows: Figure 10The signal processing flow shown forms a new 3.0.2 channel signal, which is then output to the speaker for playback.

[0157] In this embodiment, for speakers of different channels, when the first speaker cannot play a low-frequency signal with a frequency lower than a preset frequency, the first audio signal corresponding to the first speaker can be divided to obtain a high-frequency first sub-signal and a low-frequency second sub-signal. By allocating the high-frequency sub-signal to the first speaker for playback and allocating the low-frequency sub-signal to the second speaker for playback, since the second speaker can play the low-frequency signal normally, it can be ensured that all the contents in the first audio signal can be played normally, thereby improving the sound playback effect of the display device.

[0158] In some embodiments, in the step of delaying the second sub-signal, the controller is further configured to perform the following steps:

[0159] S410: The controller obtains a first distance from a sound played by the first speaker to an object, and a second distance from a sound played by the second speaker to an object, wherein the object is specifically a user, and the first distance and the second distance are distances from the sound to the user's ear.

[0160] S420: The controller determines a delay time according to the first distance and the second distance;

[0161] S430: The controller performs delay processing on the second sub-signal according to the delay time to ensure synchronization between the second sub-signal and the second audio signal.

[0162] Specifically, Figure 12 This is another scenario diagram of an embodiment of the present application, such as Figure 12 As shown, the sound played by the first speaker is reflected by the roof ceiling and then transmitted to the human ear. The total transmission distance is the first distance D1. The sound played by the second speaker is basically transmitted directly to the human ear. The transmission distance is the second distance D2. According to the layout environment of general household facilities, D1 is usually greater than D2. If the second sub-signal is not delayed, the second sub-signal assigned to the second speaker for playback will enter the human ear first, and the first sub-signal will enter the human ear later. Since the human ear will judge the direction of the sound based on the one heard first, this will cause the human ear to think that the sound of the first audio signal is emitted from the position of the second speaker, thereby affecting the effect of the sky sound.

[0163] Therefore, when the controller performs signal processing, it first needs to delay the second sub-signal so that the sound emitted by the first speaker reaches the human ear no later than the time when the sound emitted by the second speaker reaches the human ear. The best situation is to ensure that the sound emitted by the first speaker reaches the human ear earlier than the time when the sound emitted by the second speaker reaches the human ear.

[0164] In the delay processing, the controller first acquires the first distance D1 and the second distance D2, and then determines the delay time according to D1 and D2, so as to delay process the second sub-signal according to the delay time, to ensure the sound playing effect of the sky sound.

[0165] In some embodiments, in the step of determining the delay time according to the first distance and the second distance, the controller is further configured to perform the following steps:

[0166] S421, calculate the distance difference between the first distance and the second distance, due to the existence of the distance difference, there is a time interval between the time points when the sounds played by the first loudspeaker and the second loudspeaker propagate to the human ear, that is, there is a delay;

[0167] S422, calculate the ratio of the distance difference to the sound propagation speed, which is the delay time;

[0168] S423, determine the sum of the ratio and the first preset time as the delay time.

[0169] Specifically, after obtaining the first distance D1 and the second distance D2, the controller first calculates the distance difference d between D1 and D2, and then obtains the ratio of the distance difference d to the sound propagation speed v.

[0170] For example, assuming that D1 is 4.54m, D2 is 2.5m, and the sound propagation speed v is 340m / s, the distance difference d=D1-D2=2.04m can be obtained, and the ratio t=d / v=0.006s=6ms.

[0171] According to the Hass effect, if the time difference between the arrival of sound waves from two sound sources at the human ear is within 5-35ms, the human cannot distinguish the two sound sources, and only the leading sound (the advanced sound source) gives the human the sense of direction. If the time difference is between 35ms and 50ms, the human ear begins to perceive the existence of the lagging sound source, but the sense of direction of the listening is still the leading sound source. And as the time difference becomes longer, the sense of direction becomes stronger, but it leads to the human being more and more able to perceive the existence of the later sound.

[0172] In this embodiment, since the ratio t is 6ms, considering the Hass effect, a first preset time can be added to 6ms, and the sum of the two is taken as the delay time. For example, the first preset time t1 can be set to 16ms, so the delay time T=t+t1=22ms.

[0173] In general, for the setting of the delay time, according to the test, when the delay time is in the range of 22ms±8ms, a better sound playing effect can be ensured. Among them, the reference Figure 12If the delay time is greater than the maximum value of the range, i.e. 30 ms, due to the existence of the propagation path D3, a person with sensitive hearing will perceive a large sound delay between the two propagation paths D3 and D2, thus the sound heard will have a certain echo feeling, affecting the sound quality. Therefore, in order to avoid echo, the upper limit of the delay time is set to 30 ms.

[0174] For the scheme in the embodiment, the characteristics of the electrical signals of the sound emitted by the first loudspeaker and the second loudspeaker are explained. The spectral characteristics of the sound signals can be obtained by detecting the sound signals using a spectrum analyzer or other devices with spectrum analysis capability.

[0175] Figure 13 The spectral characteristics of the signals of the first loudspeaker and the second loudspeaker in the embodiment are shown in FIG. 2. As shown in FIG. 2, a full-frequency pink noise signal or a sweep signal is played through the sky sound channel, and the signals of the first loudspeaker and the second loudspeaker tested do not overlap in frequency (within 3 dB roll-off points). In addition, the two signals can form a complete wideband spectrum signal after being superimposed in the frequency spectrum. Figure 13

[0176] Specifically, the sound signals can be used for testing, and the testing position is the position of the person shown in FIG. 3 or FIG. 4. Figure 5 Figure 12 If the electrical signals are tested, the signals of the first loudspeaker and the second loudspeaker still do not overlap in frequency (within 3 dB roll-off points), and can be connected to form a full-band signal. Because loudspeakers of different types or structures have different electro-acoustic conversion efficiencies, the average value of the electrical signals of the first loudspeaker may be significantly different from that of the second loudspeaker, for example, the voltage of the first loudspeaker is twice that of the second loudspeaker.

[0177] In addition, an oscilloscope or other time domain analyzer can be used to measure the delay of the output of the first loudspeaker and the second loudspeaker. Figure 14 The test results obtained at the moment when the full-frequency pink noise starts to be played on the channel of the first audio signal in the embodiment are shown in FIG. 5. As shown in FIG. 5, the signal of the first loudspeaker is Δt earlier than the signal of the second loudspeaker (the upper signal is the signal of the first loudspeaker, and the lower signal is the signal of the second loudspeaker), where Δt is in the range of 22 ms±8 ms. Figure 14

[0178] The measured signals can be electrical signals or sound signals at the same time. If the sound signals are tested, the measurement position should be the position directly opposite the loudspeaker diaphragm or sound hole, and the test device should be at the same distance from the loudspeaker position to avoid time delay errors caused by the test distance.

[0179] ​​​Figure 15 A signal diagram of the human voice in the embodiments of the present application is shown in FIG. 4. As shown in FIG. 4, for the human voice, since the pronunciation characteristics of human voice are composed of a series of harmonics, the arrows in the figure are the frequency components of the harmonics, the fundamental frequency of the human voice is about 370 Hz, the second harmonic is 740 Hz, and the third harmonic is 1119 Hz, so the second harmonic is less than 1000 Hz and the third harmonic is greater than 1000 Hz. Figure 15

[0180] At this time, if the signals above 1000 Hz are played back first, the harmonics will reach the human ear first and the fundamental frequency will reach the human ear later. If the audience hears the harmonics first, they will have the feeling of broken sound.

[0181] Based on the above situation, in some embodiments, in the step of delaying the second sub-signal, the controller is further configured to perform the following steps:

[0182] S440, the controller performs human voice detection on the first audio signal to obtain a detection result, the detection result being whether the first audio signal includes human voice, and the human voice detection process can be realized by using an existing detection method;

[0183] S450, when the detection result is that the first audio signal includes human voice, the controller determines the second preset time as the delay time and delays the second sub-signal according to the second preset time.

[0184] Specifically, in order to prevent the situation that the harmonics of the human voice reach the human ear first and the fundamental frequency reaches the human ear later, the controller can reduce the delay time when the human voice is included in the sky sound. In the present embodiment, the controller can pre-set a smaller second preset time, and when the human voice is detected by the human voice detection, the second preset time can be directly set as the delay time and the delay processing is performed.

[0185] The second preset time can be determined according to an empirical value. For example, when the first audio signal includes human voice, if the delay time is set to 14 ms, a better playing effect can be ensured, so the second preset time can be set to 14 ms.

[0186] It should be noted that the specific time values involved in the present embodiment, such as the first preset time of 16 ms, the range of the delay time of 22 ms ± 8 ms, the second preset time of 14 ms, etc., are all exemplary descriptions of the present embodiment, and in actual application process, the specific values of the above times can also be adjusted according to the actual situation, and are not limited to the above values.

[0187] In some embodiments, the controller is further configured to perform the following steps:

[0188] ​S460, in the case that the detection result is that the first audio signal does not include human voice, the controller performs energy detection on the first audio signal to determine an energy distribution of the first audio signal;

[0189] If the energy of the first audio signal at the preset frequency is lower than the preset energy value, the controller determines that the third preset time is the delay time, and performs delay processing on the second sub-signal according to the third preset time to realize signal synchronization.

[0190] Specifically, for some characteristic sound sources, in the case that the first audio signal does not include human voice, it is indicated that the delay time does not need to be reduced, and at this time, the energy distribution of the signal at different frequencies is determined by performing energy detection.

[0191] Figure 16 For an example diagram of the signal in the embodiments of the present application, as shown in Figure 16 If it is detected that the energy of the signal at the preset frequency (for example, 1000 Hz) is lower than the preset energy value, it is indicated that the energy of the signal near 1000 Hz is less, that is, there is less harmonic component of the signal near 1000 Hz, and at this time, if the delay of the sound signal above 1000 Hz is increased, the height sense of the sound can be effectively improved, and therefore, the delay time can be increased.

[0192] In the embodiments, the controller can pre-set a larger third preset time, and in the case that human voice is not detected by human voice detection, if it is determined by energy detection that the energy of the first audio signal at the preset frequency is lower than the preset energy value, the third preset time can be directly set as the delay time and delay processing is performed.

[0193] The third preset time can be determined according to an empirical value, for example, the third preset time can be set to 30 ms, so that the height sense of the sound can be significantly improved.

[0194] In some embodiments, in the step of dividing the first audio signal into the first sub-signal and the second sub-signal, the controller is further configured to perform the following steps:

[0195] S210, the controller determines a signal valley value frequency of the first audio signal, and compares the signal valley value frequency with the preset frequency in size;

[0196] S220, in the case that the signal valley value frequency is greater than the preset frequency, the controller divides the first audio signal into a new first sub-signal and a new second sub-signal according to the signal valley value frequency, the frequency of the new first sub-signal is greater than the signal valley value frequency, and the frequency of the new second sub-signal is less than or equal to the signal valley value frequency.

[0197] Specifically, for some special sound signals, for example, the signals emitted by a helicopter, which include both low-frequency signals of the engine and high-frequency signals of the propeller, and the harmonic frequency of the low-frequency signals may exceed the preset frequency, therefore, in order to minimize the division of the complete signal, the signal valley frequency of the audio signal can be detected, and the size relationship between the signal valley frequency and the preset frequency can be compared.

[0198] When the signal valley frequency is less than the preset frequency, that is, the signal valley frequency appears before 1000Hz, since the first loudspeaker cannot play low frequencies below 1000Hz, the frequency allocation frequency point is not changed, that is, the preset frequency 1000Hz is used to divide the first sub-signal and the second sub-signal.

[0199] In addition, when the signal valley frequency is greater than the preset frequency, that is, the signal valley frequency appears after 1000Hz, the signal division strategy can be adjusted, that is, the signal valley frequency is used as the division point to divide the first sub-signal and the second sub-signal.

[0200] For example, when the signal valley frequency is 1200Hz, the division can be performed according to 1200Hz to obtain the first sub-signal with a frequency greater than 1200Hz and the second sub-signal with a frequency less than or equal to 1200Hz, so that by adjusting the division point frequency of the signal division, the complete signal can be divided as little as possible to improve the sound playing effect.

[0201] In some embodiments, in the step of sending the first sub-signal to the first loudspeaker for playing, the controller is further configured to perform the following steps:

[0202] S310, the controller performs high-pass filtering and signal gain adjustment processing on the second audio signal, and merges the processed second audio signal with the first sub-signal to obtain a second merged signal;

[0203] S320, the controller sends the second merged signal to the first loudspeaker for playing to ensure that the sound center and the picture center are consistent.

[0204] The main channel loudspeaker of the display device is usually located at the bottom of the display device, that is, the left and right main channel sounds and dialogue voices are emitted from the bottom of the display device, however, the image display of the display device is on the screen of the display device, which may cause the sound center and the picture center to be inconsistent.

[0205] To solve the above problem, the second audio signal is further merged with the first sub-signal for playing to ensure that the sound center and the picture center are consistent.

[0206] Figure 17A schematic diagram of the processor for signal processing in the embodiments of the present application is shown in FIG. 1. Figure 17 For the second audio signal, a high-pass filter is first used for high-pass filtering, which is configured to pass signals with a frequency higher than a preset frequency, for example, 1000 Hz. In addition, in order to control the influence on the first sub-signal, gain adjustment processing is further performed after high-pass filtering. Since the second audio signal is generally larger than the first audio signal, the gain adjustment processing can be specifically negative gain adjustment.

[0207] In some embodiments, the controller is further configured to perform the following steps:

[0208] S510, the controller acquires a third audio signal allocated to a third loudspeaker;

[0209] S520, the controller performs delay processing on the third audio signal, so that the delayed third audio signal is synchronized with the first combined signal, to ensure the sound playing effect;

[0210] S530, the controller sends the delayed third audio signal to the third loudspeaker for playing.

[0211] Specifically, the third audio signal can be a center channel signal, and the corresponding third loudspeaker is a center channel loudspeaker.

[0212] Figure 18 A schematic diagram of the processor for signal processing in the embodiments of the present application is shown in FIG. 1. Figure 18 For the third audio signal of the center channel, the controller can perform delay processing thereon to ensure that the delayed third audio signal is synchronized with the first combined signal, and send the delayed third audio signal to the third loudspeaker for playing, so as to ensure the synchronization of all channel signals and the sound playing effect.

[0213] In some embodiments, the controller is further configured to perform the following steps:

[0214] S540, the controller performs high-pass filtering and signal gain adjustment processing on the third audio signal, and combines the processed third audio signal with the first sub-signal to obtain a third combined signal;

[0215] S550, the controller sends the third combined signal to the first loudspeaker for playing.

[0216] Specifically, in order to improve the height of the center channel signal, the controller can also combine the third audio signal with the first sub-signal to improve the sound playing effect.

[0217] Figure 19 A schematic diagram of the processor for signal processing in the embodiments of the present application is shown in FIG. 1. Figure 19As shown, the first sub-signal can be combined with the second audio signal or the third audio signal, that is, either of the two signals can be combined with the first sub-signal, or the two signals can be combined with the first sub-signal at the same time, so as to improve the playing effect of the sound.

[0218] In some embodiments, in the step of dividing the first audio signal into the first sub-signal and the second sub-signal, the controller is further configured to perform the following steps:

[0219] The first audio signal is input into a high-pass filter and a low-pass filter respectively, the signal output via the high-pass filter is the first sub-signal, and the signal output via the low-pass filter is the second sub-signal.

[0220] The high-pass filter is used to pass signals with a frequency greater than a preset frequency, and the low-pass filter is used to pass signals with a frequency less than or equal to the preset frequency.

[0221] Specifically, in the process of dividing the first audio signal, in addition to the software implementation, the first audio signal can also be input into the high-pass filter and the low-pass filter to obtain the first sub-signal and the second sub-signal through the hardware implementation.

[0222] Figure 20 A schematic diagram of signal processing of the processor in the embodiment of the present application is shown in FIG. 1. Figure 20 As shown, in the process of obtaining the first sub-signal, the first audio signal can be sent to a power amplifier with a high-pass filtering function, so as to reduce the use of the high-pass filter and reduce the cost.

[0223] In addition, in the process of signal division in the embodiment, since the signal division is realized through hardware, the requirement for the computing capacity of the chip, such as a DSP (Digital Signal Processing) or an ARM (Advanced RISC Machine), can be reduced, so that the scheme of the present application can be applied to a display device with low performance.

[0224] In some embodiments, an audio signal playing method is provided, which is applied to a display device, Figure 21 A schematic diagram of the audio signal playing method in the embodiment of the present application is shown in FIG. 1. Figure 21 The method comprises the following steps:

[0225] S100, obtaining audio signals of different channels, the audio signals of different channels comprising a first audio signal allocated to a first loudspeaker and a second audio signal allocated to a second loudspeaker, wherein the first loudspeaker and the second loudspeaker play audio signals of different channels;

[0226] S200, divide the first audio signal into a first sub-signal and a second sub-signal, the frequency of the first sub-signal being greater than a preset frequency, and the frequency of the second sub-signal being less than or equal to the preset frequency;

[0227] S300, send the first sub-signal to the first loudspeaker for playing;

[0228] S400, perform delay processing on the second sub-signal, merge the delayed second sub-signal with the second audio signal to obtain a first merged signal, and send the first merged signal to the second loudspeaker for playing.

[0229] For the limitation of the audio signal playing method, reference can be made to the limitation of the display device in the above-mentioned embodiments, which will not be described here.

[0230] The embodiment provides an audio signal playing method. For loudspeakers of different sound channels, when a first loudspeaker cannot play a low-frequency signal with a frequency less than a preset frequency, the first audio signal corresponding to the first loudspeaker can be divided to obtain a high-frequency first sub-signal and a low-frequency second sub-signal, the high-frequency sub-signal is distributed to the first loudspeaker for playing, and the low-frequency sub-signal is distributed to a second loudspeaker for playing. Since the second loudspeaker can normally play the low-frequency signal, all contents in the first audio signal can be normally played, thereby improving the sound playing effect of the display device.

[0231] It should be understood that, although each step in the flowchart in the above-mentioned embodiment is displayed in sequence according to the arrow, these steps are not necessarily executed in sequence according to the arrow. Unless otherwise specified in this article, the execution of these steps has no strict sequence limitation, and they can be executed in other orders. Moreover, at least part of the steps in the figure can include multiple sub-steps or multiple stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution order is not necessarily sequential, but can be alternately executed with other steps or sub-steps or stages of other steps.

[0232] In some embodiments, a computer device is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to realize the above-mentioned audio signal playing method.

[0233] In some embodiments, a computer readable storage medium is provided, wherein computer execution instructions are stored in the computer readable storage medium, and the computer execution instructions are executed by a processor to realize the steps of the method embodiments of the present application.

[0234] In some embodiments, a computer program product is provided, comprising a computer program which, when executed by a processor, implements the steps of the method embodiments of the present application.

[0235] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer readable storage medium, and when the computer program is executed, the processes of the above-mentioned embodiment methods can be included. Any reference to memory, storage, databases, or other media in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration but not limitation, RAM is available in many forms such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0236] Other embodiments of the present disclosure will be apparent to those skilled in the art with the consideration of the specification and practice of the application disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present disclosure following the general principles thereof and including such departures from the present disclosure that come within known, accepted, and customary practice in the art to which the present disclosure pertains. The specification and examples are to be regarded as illustrative only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0237] It should be understood that the present disclosure is not limited to the precise structures herein described and illustrated in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the claims that follow.

Claims

1. A display device, characterized in that: include: a first speaker, configured to play an audio signal of a first channel; a second speaker, configured to play an audio signal of a second channel different from the first channel; A decoder is used to decode the signal input by the signal source to obtain a decoding result; a controller connected to the first speaker, the second speaker, and the decoder, respectively, the controller being configured to: Acquire audio signals of different channels according to the decoding result, where the audio signals of different channels include a first audio signal allocated to a first speaker and a second audio signal allocated to a second speaker; dividing the first audio signal into a first sub-signal and a second sub-signal, wherein a frequency of the first sub-signal is greater than a preset frequency, and a frequency of the second sub-signal is less than or equal to the preset frequency; sending the first sub-signal to the first speaker for playing; Obtaining a first distance from which the sound played by the first speaker propagates to an object, and a second distance from which the sound played by the second speaker propagates to the object; determining a first delay time according to the first distance and the second distance; Performing human voice detection on the first audio signal to obtain a detection result; When the detection result indicates that the first audio signal includes a human voice, determining a second delay time, and performing delay processing on the second sub-signal according to the second delay time; wherein the second delay time is less than the first delay time; When the detection result is that the first audio signal does not include human voice, performing energy detection on the first audio signal; If the energy of the first audio signal at the preset frequency is lower than a preset energy value, determining a third delay time, and performing delay processing on the second sub-signal according to the third delay time; wherein the third delay time is greater than the first delay time; The delayed second sub-signal is combined with the second audio signal to obtain a first combined signal, and the first combined signal is sent to the second speaker for playback.

2. The display device according to claim 1, wherein In the step of determining the first delay time according to the first distance and the second distance, the controller is further configured to: calculating a distance difference between the first distance and the second distance; Calculating the ratio of the distance difference to the speed of sound propagation; The sum of the ratio and the first preset time is determined to be the first delay time.

3. The display device according to claim 1 or 2, characterized in that In the step of dividing the first audio signal into a first sub-signal and a second sub-signal, the controller is further configured to: determining a signal valley frequency of the first audio signal; When the signal valley frequency is greater than the preset frequency, the first audio signal is divided into a new first sub-signal and a new second sub-signal according to the signal valley frequency, the frequency of the new first sub-signal is greater than the signal valley frequency, and the frequency of the new second sub-signal is less than or equal to the signal valley frequency.

4. The display device according to claim 1 or 2, characterized in that In the step of sending the first sub-signal to the first speaker for playing, the controller is further configured to: performing high-pass filtering and signal gain adjustment processing on the second audio signal, and combining the processed second audio signal with the first sub-signal to obtain a second combined signal; The second combined signal is sent to the first speaker for playback.

5. The display device according to claim 1, wherein The controller is further configured to: obtaining a third audio signal distributed to a third speaker; performing delay processing on the third audio signal so that the delayed third audio signal is synchronized with the first combined signal; The delayed third audio signal is sent to the third speaker for playing.

6. The display device according to claim 5, wherein: The controller is further configured to: performing high-pass filtering and signal gain adjustment processing on the third audio signal, and combining the processed third audio signal with the first sub-signal to obtain a third combined signal; The third combined signal is sent to the first speaker for playback.

7. A method for playing an audio signal, applied to a display device, characterized in that: include: Acquire audio signals of different channels, where the audio signals of different channels include a first audio signal assigned to a first speaker and a second audio signal assigned to a second speaker, wherein the audio signals played by the first speaker and the second speaker have different channels; dividing the first audio signal into a first sub-signal and a second sub-signal, wherein a frequency of the first sub-signal is greater than a preset frequency, and a frequency of the second sub-signal is less than or equal to the preset frequency; sending the first sub-signal to the first speaker for playing; Obtaining a first distance from which the sound played by the first speaker propagates to an object, and a second distance from which the sound played by the second speaker propagates to the object; determining a first delay time according to the first distance and the second distance; Performing human voice detection on the first audio signal to obtain a detection result; When the detection result indicates that the first audio signal includes a human voice, determining a second delay time, and performing delay processing on the second sub-signal according to the second delay time; wherein the second delay time is less than the first delay time; When the detection result is that the first audio signal does not include human voice, performing energy detection on the first audio signal; If the energy of the first audio signal at the preset frequency is lower than a preset energy value, determining a third delay time, and performing delay processing on the second sub-signal according to the third delay time; wherein the third delay time is greater than the first delay time; The delayed second sub-signal is combined with the second audio signal to obtain a first combined signal, and the first combined signal is sent to the second speaker for playback.

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