Sound equipment and audio signal playing method

Abstract

The invention relates to sound equipment and an audio signal playing method, which are applied to a terminal technology and can increase the functions of the sound equipment, improve the universality of the sound equipment and reduce the production cost. The sound equipment is in communication connection with display equipment, and comprises a controller which is configured to receive target audio signals from the display equipment through the communication connection, and the target audio signals comprise audio signals of different frequency bands; collecting an environment audio signal through a microphone; determining the similarity between the environment audio signal and the target audio signal; when the similarity is greater than or equal to a similarity threshold value, obtaining a first audio signal from the target audio signal, the frequency of the first audio signal being less than or equal to a target frequency; and playing the first audio signal.

Description

Technical Field

[0001] This disclosure relates to terminal technology. More specifically, it relates to an audio device and an audio signal playback method. Background Technology

[0002] Typically, display devices have audio playback capabilities, but they may lack a subwoofer unit. Even if they do have a subwoofer unit, the power output is often low (mostly no more than 50W) due to acoustic chamber limitations, only reaching down to around 60Hz. This provides only basic bass effects and has limited performance in extremely low frequencies. Therefore, display devices often experience poor bass performance when playing audio.

[0003] In related technologies, external speakers are typically used to address the poor bass performance of display devices. However, these external speakers are usually dedicated subwoofers designed to match the specific features and configuration of the display device. This results in a lack of universal compatibility, limited functionality, and high production costs. Summary of the Invention

[0004] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, the present disclosure provides an audio device and an audio signal playback method, which can increase the functionality of the audio device, improve the versatility of the audio device, and reduce production costs.

[0005] In a first aspect, embodiments of this disclosure provide an audio device that is communicatively connected to a display device; comprising: a controller configured to: receive a target audio signal from the display device via the communication connection, the target audio signal including audio signals of different frequency bands; acquire an ambient audio signal via a microphone; determine the similarity between the ambient audio signal and the target audio signal; if the similarity is greater than or equal to a similarity threshold, acquire a first audio signal from the target audio signal, wherein the frequencies of the first audio signal are all less than or equal to the target frequency; and play the first audio signal.

[0006] In this embodiment, the audio device can compare the similarity between the audio signal played by a display device of different models and functions (corresponding to the collected ambient audio signal) and the target audio signal received from the display device. If the similarity is greater than or equal to a similarity threshold, the first audio signal (low-frequency band) is obtained from the target audio signal for playback. Since the similarity is greater than or equal to the similarity threshold, it indicates that the display device itself is playing the target audio signal. Therefore, the audio device does not need to play the full frequency band of the target audio signal; it only needs to play the low-frequency band of the target audio signal as a subwoofer for the display device to help improve the bass effect of the audio signal playback. Thus, by incorporating the audio signal analysis and low-frequency signal acquisition scheme into the audio device, the audio device can be adapted to any model and function of the display device as an external subwoofer. Compared to related technologies, which require the display device to have its own built-in audio analysis and frequency division scheme based on its model and function, and to set up a matching external subwoofer, this embodiment does not require configuring a dedicated subwoofer to match the model and function of different display devices. This increases the functionality of the audio device, improves its versatility, and reduces production costs.

[0007] In some embodiments of this disclosure, the controller is specifically configured to: determine a target frequency when the similarity is greater than or equal to a similarity threshold; and separate a first audio signal from the target audio signal whose frequency is less than or equal to the target frequency.

[0008] In this embodiment of the disclosure, the target frequency is first determined, and then a first audio signal with a frequency less than or equal to the target frequency is separated from the target audio signal. In this way, a more suitable target frequency can be determined, and then a more suitable first audio signal can be separated.

[0009] In some embodiments of this disclosure, the controller is specifically configured to: perform spectral analysis on the environmental audio signal when the similarity is greater than or equal to a similarity threshold; determine the first frequency corresponding to the frequency point where the ratio of frequency point energy to peak energy is equal to a ratio threshold as the lowest frequency of the speaker of the display device; and determine the target frequency based on the first frequency, wherein the target frequency is less than or equal to the first frequency.

[0010] In this embodiment of the disclosure, by performing spectrum analysis on the ambient audio signal, the low-frequency lower limit (first frequency) of the speaker of the display device is determined, and then a more suitable target frequency is determined based on the first frequency to ensure that the sound frequency bands of the display device and the audio device are reasonably connected and to avoid sound field problems.

[0011] In some embodiments of this disclosure, the controller is specifically configured to: output a plurality of first frequency options when the similarity is greater than or equal to a similarity threshold, each first frequency option indicating a second frequency; and, in response to a selection operation of a target first frequency option among the plurality of first frequency options, determine the second frequency indicated by the target first frequency option as the target frequency.

[0012] In this embodiment of the disclosure, the target frequency is determined by the user selecting the target frequency from a plurality of second frequencies, which makes the effect of the audio device playing the low-frequency signal in the target audio signal more in line with the user's needs and can improve the user experience.

[0013] In some embodiments of this disclosure, the controller is further configured to: after playing a first audio signal, in response to a frequency switching trigger operation, output a plurality of second frequency options, each second frequency option indicating a third frequency; in response to a selection operation of a target second frequency option among the plurality of second frequency options, separate a second audio signal from the target audio signal, the frequency of the second audio signal being less than or equal to the third frequency indicated by the target second frequency option; and play the second audio signal.

[0014] In this embodiment of the disclosure, if the user is not satisfied with the playback effect of the first audio signal, the user selects a third frequency from multiple third frequencies as the frequency point for frequency division of the target audio signal, thereby obtaining a low-frequency signal (second audio signal) that satisfies the user. This makes the effect of the audio device playing the low-frequency signal in the target audio signal more in line with the user's needs and can improve the user experience.

[0015] In some embodiments of this disclosure, the controller is further configured to play the target audio signal if the similarity is less than the similarity threshold.

[0016] In this embodiment, the audio device compares the similarity between the collected ambient audio signal and the target audio signal received from the display device. If the similarity is less than a similarity threshold, it indicates that the display device itself is not playing the target audio signal. Therefore, the audio device needs to play the full frequency band of the target audio signal. This allows the device to determine whether to play only the low-frequency signal or the full frequency band audio signal based on the similarity between the ambient audio signal and the target audio signal. This increases the functionality of the audio device, improves its versatility, and reduces production costs.

[0017] In some embodiments of this disclosure, the controller is specifically configured to: determine that the audio device is in subwoofer mode when the similarity is greater than or equal to the similarity threshold; acquire a first audio signal from the target audio signal based on the subwoofer mode; determine that the audio device is in full-range playback mode when the similarity is less than the similarity threshold; and play the target audio signal based on the full-range playback mode.

[0018] In this embodiment, a subwoofer mode and a full-range playback mode are provided for the audio device. This allows the audio device to switch between the subwoofer mode and the full-range playback mode according to actual usage needs, enabling the audio device to better distinguish different playback functions and achieve different playback effects.

[0019] Secondly, embodiments of this disclosure provide an audio signal playback method applied to an audio device that is communicatively connected to a display device, comprising: receiving a target audio signal from the display device via the communication connection, the target audio signal including audio signals of different frequency bands; acquiring an ambient audio signal via a microphone; determining the similarity between the ambient audio signal and the target audio signal; if the similarity is greater than or equal to a similarity threshold, acquiring a first audio signal from the target audio signal, wherein the frequencies of the first audio signal are all less than or equal to the target frequency; and playing the first audio signal.

[0020] In some embodiments of this disclosure, obtaining a first audio signal from the target audio signal when the similarity is greater than or equal to a similarity threshold includes: determining a target frequency when the similarity is greater than or equal to the similarity threshold; and separating a first audio signal from the target audio signal whose frequency is less than or equal to the target frequency.

[0021] In some embodiments of this disclosure, determining a target frequency when the similarity is greater than or equal to the similarity threshold includes: performing spectral analysis on the environmental audio signal when the similarity is greater than or equal to the similarity threshold; determining a first frequency corresponding to a frequency point where the ratio of frequency point energy to peak energy is equal to a ratio threshold as the lowest frequency of the speaker of the display device; and determining the target frequency based on the first frequency, wherein the target frequency is less than or equal to the first frequency.

[0022] In some embodiments of this disclosure, determining a target frequency when the similarity is greater than or equal to the similarity threshold includes: displaying a plurality of first frequency options when the similarity is greater than or equal to the similarity threshold, each first frequency option indicating a second frequency; and determining the second frequency indicated by the target first frequency option as the target frequency in response to a selection operation of a target first frequency option among the plurality of first frequency options.

[0023] In some embodiments of this disclosure, after playing the first audio signal, the method further includes: displaying a plurality of second frequency options in response to a triggering operation of switching frequencies, each second frequency option indicating a third frequency; separating a second audio signal from the target audio signal in response to a triggering operation of a target second frequency option among the plurality of second frequency options, the frequency of the second audio signal being less than or equal to the third frequency indicated by the target second frequency option; and playing the second audio signal.

[0024] In some embodiments of this disclosure, the method further includes: playing the target audio signal if the similarity is less than the similarity threshold.

[0025] In some embodiments of this disclosure, obtaining a first audio signal from the target audio signal when the similarity is greater than or equal to a similarity threshold includes: determining that the audio device is in subwoofer mode when the similarity is greater than or equal to the similarity threshold; and obtaining the first audio signal from the target audio signal based on the subwoofer mode. Playing the target audio signal when the similarity is less than the similarity threshold includes: determining that the audio device is in full-range playback mode when the similarity is less than the similarity threshold; and playing the target audio signal based on the full-range playback mode.

[0026] Thirdly, embodiments of this disclosure provide a computer-readable storage medium, including: storing a computer program on the computer-readable storage medium, wherein when the computer program is executed by a processor, it implements the audio signal playback method as described in the second aspect.

[0027] Fourthly, embodiments of this disclosure provide a computer program product, including: when the computer program product is run on a computer, causing the computer to implement the audio signal playback method as shown in the second aspect.

[0028] Compared with the prior art, the technical solution provided in this disclosure has the following advantages: In this disclosure, a target audio signal from a display device is received through a communication connection with the display device. The target audio signal includes audio signals of different frequency bands. An ambient audio signal is collected through a microphone. The similarity between the ambient audio signal and the target audio signal is determined. If the similarity is greater than or equal to a similarity threshold, a first audio signal is obtained from the target audio signal. The frequencies of the first audio signal are all less than or equal to the target frequency. The first audio signal is then played. It is understandable that the audio device can compare the similarity between the audio signal played by the display device of different models and functions (corresponding to the collected ambient audio signal) and the target audio signal received from the display device. If the similarity is greater than or equal to a similarity threshold, the first audio signal (low-frequency band) is obtained from the target audio signal for playback. Since the similarity is greater than or equal to the similarity threshold, it indicates that the display device itself is playing the target audio signal. Therefore, the audio device does not need to play the full frequency band of the target audio signal, but only needs to play the low-frequency band of the target audio signal as a subwoofer to assist the display device in improving the bass effect of the audio signal playback. In this way, since the audio signal analysis and low-frequency signal acquisition scheme is set in the audio device, the audio device can be used as an external subwoofer for any model and function of the display device. Compared with related technologies, which require the display device to have built-in audio analysis and frequency division schemes according to the model and function of the display device, and to set up a matching external subwoofer accordingly, the embodiments of this disclosure do not require configuring a dedicated subwoofer that matches the model and function of different display devices. This can increase the functionality of the audio device, improve the versatility of the audio device, and reduce production costs. Attached Figure Description

[0029] To more clearly illustrate the implementation methods in the embodiments of this disclosure or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings.

[0030] Figure 1 An operational scenario between a display device and a control device according to some embodiments is illustrated;

[0031] Figure 2 A hardware configuration block diagram of a control device according to some embodiments is shown;

[0032] Figure 3 A hardware configuration block diagram of a display device according to some embodiments is shown;

[0033] Figure 4One of the schematic diagrams of an audio device structure according to some embodiments is shown;

[0034] Figure 5 A second schematic diagram of the structure of an audio device according to some embodiments is shown;

[0035] Figure 6 A schematic diagram illustrating the connection between an audio device and a mobile phone according to some embodiments is shown;

[0036] Figure 7 One of the schematic diagrams showing the connection between an audio device and a television according to some embodiments is shown;

[0037] Figure 8 A second schematic diagram showing the connection between an audio device and a television according to some embodiments is shown;

[0038] Figure 9 A third schematic diagram showing the connection between an audio device and a television according to some embodiments is shown;

[0039] Figure 10 A flowchart illustrating an audio signal playback method according to some embodiments is shown. Detailed Implementation

[0040] To make the objectives and implementation methods of this disclosure clearer, the exemplary embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this disclosure. Obviously, the exemplary embodiments described are only some embodiments of this disclosure, and not all embodiments.

[0041] It should be noted that the brief descriptions of terms in this disclosure are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this disclosure. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0042] The terms "first," "second," "third," etc., used in this disclosure, in the specification, claims, and accompanying drawings are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise specified. It should be understood that such terms are interchangeable where appropriate.

[0043] The terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device that includes a range of components is not necessarily limited to all of the components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0044] The display device provided in this disclosure can have various implementation forms, such as a television, a smart television, a laser projection device, a monitor, an electronic bulletin board, an electronic table, a mobile phone, a tablet computer, a laptop computer, a handheld computer, an in-vehicle electronic device, etc.

[0045] Figure 1 This is a schematic diagram illustrating an operational scenario between a display device and a control device according to an embodiment, wherein the control device includes a smart device or a control apparatus. Figure 1 As shown, the user can operate the display device 200 through the smart device 300 or the control device 100. The display device 200 can play audio signals through the audio device 500, or play audio signals in conjunction with the audio device 500.

[0046] In some embodiments, the control device 100 may be a remote control. Communication between the remote control and the display device includes infrared protocol communication, Bluetooth protocol communication, and other short-range communication methods, controlling the display device 200 wirelessly or via wired means. Users can control the display device 200 by inputting user commands through buttons on the remote control, voice input, control panel input, etc.

[0047] In some embodiments, a smart device 300 (such as a mobile terminal, tablet computer, computer, laptop computer, etc.) can also be used to control the display device 200. For example, an application running on the smart device can be used to control the display device 200.

[0048] In some embodiments, the display device may receive instructions not through the aforementioned smart devices or control devices, but through touch or gestures.

[0049] 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, it can be controlled by directly receiving the user's voice commands through a module configured inside the display device 200 for acquiring voice commands, or it can be controlled by receiving the user's voice commands through a voice control device set outside the display device 200.

[0050] In some embodiments, the display device 200 also communicates with the server 400. The display device 200 may communicate via a local area network (LAN), wireless local area network (WLAN), and other networks. The server 400 may provide various content and interactive features to the display device 200. The server 400 may be a cluster or multiple clusters, and may include one or more types of servers.

[0051] Figure 2 An exemplary block diagram of the configuration of the control device 100 according to an exemplary embodiment is shown. Figure 2 As shown, the control device 100 includes a controller 110, a communication interface 130, a user input / output interface 140, an external memory, and a power supply. The control device 100 can receive user input operation commands and convert the operation commands into commands that the display device 200 can recognize and respond to, thus acting as an intermediary for interaction between the user and the display device 200.

[0052] like Figure 3 The display device 200 includes at least one of the following: a tuner 210, a communicator 220, a detector 230, an external device interface 240, a controller 250, a display 260, an audio output interface 270, a user interface 280, an external memory, and a power supply.

[0053] In some embodiments, the controller includes a processor, a video processor, an audio processor, a graphics processor, RAM, ROM, and a first interface to an nth interface for input / output.

[0054] The display 260 includes a display screen assembly for presenting images, a driving assembly for driving image display, a component for receiving image signals from the controller output, and a user control UI interface for displaying video content, image content, menu control interface, and user control UI interface.

[0055] The display 260 can be an LCD display, an OLED display, or a projection display, and can also be a projection device and a projection screen.

[0056] The communicator 220 is a component used to communicate with external devices or servers according to various communication protocol types. For example, the communicator may include at least one of the following: a Wi-Fi 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 the transmission and reception of control signals and data signals with the external control device 100 or the server 400 through the communicator 220.

[0057] User interface 280 can be used to receive control signals from control device 100 (such as an infrared remote control). It can also be used to directly receive user input operation commands and convert the operation commands into commands that the display device 200 can recognize and respond to; in this case, it can be called a user input interface.

[0058] Detector 230 is used to collect signals from the external environment or to interact with the external environment. For example, detector 230 includes a light receiver, a sensor for collecting ambient light intensity; or, detector 230 includes an image acquisition device, such as a camera, which can be used to collect external environmental scenes, user attributes, or user interaction gestures; or, detector 230 includes a sound acquisition device, such as a microphone, for receiving external sounds.

[0059] The external device interface 240 may include, but is not limited to, one or more of the following: High Definition Multimedia Interface (HDMI), analog or high-definition component input interface (component), composite video input interface (CVBS), USB input interface (USB), RGB port, etc. It may also be a composite input / output interface formed by multiple interfaces mentioned above.

[0060] The tuner / demodulator 210 receives broadcast television signals via wired or wireless means, and demodulates audio and video signals, such as EPG data signals, from multiple wireless or wired broadcast television signals.

[0061] In some embodiments, the controller 250 and the tuner 210 may be located in different separate devices, that is, the tuner 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.

[0062] The controller 250 controls the operation of the display device and responds to user operations through various software control programs stored in memory (internal or external memory). The controller 250 controls the overall operation of the display device 200. For example, in response to receiving a user command to select a UI object to display on the monitor 260, the controller 250 can perform operations related to the object selected by the user command.

[0063] 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), and random access memory (RAM), read-only memory (ROM), a first to an nth interface for input / output, a communication bus, etc.

[0064] RAM, also known as main memory, is an internal memory that directly exchanges data with the controller. It can be read and written at any time (except during refresh) and is very fast, typically serving as temporary data storage for the operating system or other running programs. Its biggest difference from ROM is data volatility; data stored in RAM is lost when power is off. RAM is used in computers and digital systems to temporarily store programs, data, and intermediate results. ROM operates in a non-destructive read-only manner; information can only be read, not written. Once information is written, it is fixed and will not be lost even if power is cut off; therefore, it is also called fixed-function memory.

[0065] Users can input commands through a graphical user interface (GUI) displayed on the monitor 260, and the user input interface receives the user input commands through the GUI. Alternatively, users can input commands by entering specific sounds or gestures, and the user input interface receives the user input commands by recognizing the sounds or gestures through sensors.

[0066] A "user interface" is the medium through which an application or operating system interacts and exchanges information with the user. It converts information from its internal form to a form that the user can accept. A common form of user interface is the graphical user interface (GUI), which refers to a user interface related to computer operation displayed graphically. It can be an icon, window, control, or other interface element displayed on the screen of a display device. Controls can include visual interface elements such as icons, buttons, menus, tabs, text boxes, dialog boxes, status bars, navigation bars, and widgets.

[0067] Bluetooth speakers are widely used audio devices, and subwoofers are essential speaker units, generally with a power of over 100W. Some even come equipped with two subwoofers larger than 6 inches, with a power exceeding 200W, a configuration far superior to the subwoofers in TVs. Moreover, the bass frequency response range can reach as low as 20Hz, and both the bass extension and output power are superior to the built-in speakers of TVs.

[0068] In related technologies, implementation methods for Bluetooth subwoofers have been proposed. However, TVs generally only support SBC encoding via Bluetooth and do not support low-latency advanced encoding formats such as AptX. The latency of Bluetooth devices is greater than 100ms, making channel synchronization between the TV and the Bluetooth speaker difficult to achieve for most models. Furthermore, if the speaker's crossover frequency is sent to the TV via the Bluetooth subwoofer, and the TV adjusts its frequency response curve after receiving the crossover frequency, the interaction process between the TV and the external speaker is complex and lacks universality. The general Bluetooth protocol does not support this capability, and it can only be achieved through the development of proprietary protocols. In addition, Bluetooth subwoofers are proprietary devices and can only be used as external subwoofers for TVs. Traditional external TV subwoofers require a dedicated bass signal output interface (such as a SUBWOODER interface) or TV firmware support for crossover functionality.

[0069] This disclosure provides an audio device and an audio signal playback method, wherein a display device can implement the audio signal playback method provided in this disclosure, or a functional module or functional entity in the audio device can implement the audio signal playback method provided in this disclosure.

[0070] In some embodiments of this disclosure, an audio device and a display device are communicatively connected; the audio device includes a controller configured to receive a target audio signal from the display device via the communication connection, the target audio signal including audio signals of different frequency bands.

[0071] The communication connection can be wired or wireless, depending on the actual situation, and is not limited here.

[0072] If the communication connection is a wired connection, it can be a wired connection between the audio equipment and the auxiliary interface (AUX) of the display equipment, a wired connection between the audio equipment and the high-definition multimedia interface (HDMI) of the display equipment, or a wired connection between the audio equipment and other interfaces (optical / coaxial, etc.) of the display equipment. No limitation is made here.

[0073] If the communication connection is wireless, it can be a WiFi connection, Bluetooth connection, etc., and there are no restrictions here.

[0074] In some embodiments of this disclosure, the controller is configured to: acquire ambient audio signals via a microphone; determine the similarity between the ambient audio signals and the target audio signal; if the similarity is greater than or equal to a similarity threshold, acquire a first audio signal from the target audio signal, wherein the frequencies of the first audio signal are all less than or equal to the target frequency; and play the first audio signal.

[0075] In some embodiments of this disclosure, feature parameters such as frequency, phase, and amplitude of the ambient audio signal and the target audio signal can be extracted separately to determine the similarity of the aforementioned feature parameters between the ambient audio signal and the target audio signal, thereby determining the similarity between the ambient audio signal and the target audio signal. Alternatively, the similarity between the ambient audio signal and the target audio signal can be determined by determining the similarity of their spectral distributions. For example, the Mel spectrum of the ambient audio signal and the target audio signal can be extracted separately, and cosine similarity or Kullback-Leibler divergence can be calculated to obtain the similarity between the ambient audio signal and the target audio signal. Other methods can also be used to determine the similarity between the ambient audio signal and the target audio signal, which are not limited here.

[0076] The similarity threshold can be determined based on the actual situation and is not limited here. For example, the similarity threshold can be 80%, 85%, 90%, etc.

[0077] It is understood that if the similarity between the ambient audio signal and the target audio signal is greater than or equal to the similarity threshold, it means that the ambient audio signal includes the target audio signal played by the display device.

[0078] The target frequency can be preset, and can be the low-frequency upper limit of the audio equipment, the low-frequency upper limit of the subwoofer channel of the audio equipment, the highest frequency in the audio signal corresponding to the subwoofer channel in the target audio signal, or one of multiple preset frequencies. No limitation is made here.

[0079] The target frequency can be determined based on the lower frequency limit of the display device, which can be obtained by analyzing the ambient audio signal; this is not limited here.

[0080] The first audio signal is the low-frequency band of the target audio signal. Playing the first audio signal on the audio equipment can enhance the bass effect of the target audio signal played on the display device.

[0081] In some embodiments of this disclosure, obtaining the first audio signal from the target audio signal may involve separating a first audio signal with a frequency less than or equal to the target frequency from the target audio signal, or separating the audio signal corresponding to the subwoofer channel from the target audio signal when the target audio signal is a multi-channel audio signal (the multi-channel audio signal includes the audio signal corresponding to the subwoofer channel). This is not limited here.

[0082] In some embodiments of this disclosure, a first audio signal can be obtained by frequency division of a target audio signal. The frequency division method for separating the first audio signal from the target audio signal is not limited. For example, the first audio signal can be obtained by frequency division using a low-pass filter.

[0083] In this embodiment, the audio device can compare the similarity between the audio signal played by a display device of different models and functions (corresponding to the collected ambient audio signal) and the target audio signal received from the display device. If the similarity is greater than or equal to a similarity threshold, the first audio signal (low-frequency band) is obtained from the target audio signal for playback. Since the similarity is greater than or equal to the similarity threshold, it indicates that the display device itself is playing the target audio signal. Therefore, the audio device does not need to play the full frequency band of the target audio signal; it only needs to play the low-frequency band of the target audio signal as a subwoofer for the display device to help improve the bass effect of the audio signal playback. Thus, by incorporating the audio signal analysis and low-frequency signal acquisition scheme into the audio device, the audio device can be adapted to any model and function of the display device as an external subwoofer. Compared to related technologies, which require the display device to have its own built-in audio analysis and frequency division scheme based on its model and function, and to set up a matching external subwoofer, this embodiment does not require configuring a dedicated subwoofer to match the model and function of different display devices. This increases the functionality of the audio device, improves its versatility, and reduces production costs.

[0084] In some embodiments of this disclosure, the controller is specifically configured to: determine a target frequency when the similarity is greater than or equal to a similarity threshold; and separate a first audio signal from the target audio signal whose frequency is less than or equal to the target frequency.

[0085] In this embodiment of the disclosure, the target frequency is first determined, and then a first audio signal with a frequency less than or equal to the target frequency is separated from the target audio signal. In this way, a more suitable target frequency can be determined, and then a more suitable first audio signal can be separated.

[0086] In some embodiments of this disclosure, the controller is specifically configured to: perform spectral analysis on the environmental audio signal when the similarity is greater than or equal to a similarity threshold; determine the first frequency corresponding to the frequency point where the ratio of frequency point energy to peak energy is equal to a ratio threshold as the lowest frequency of the speaker of the display device; and determine the target frequency based on the first frequency, wherein the target frequency is less than or equal to the first frequency.

[0087] The ratio threshold can be determined according to the actual situation, and is not limited here.

[0088] For example, the first frequency at which the frequency energy is lower than 50% of the peak energy of the spectrum is determined as the effective attenuation point, i.e., the low-frequency lower limit.

[0089] In practical applications, adjustments can be made after multiple tests based on the speaker's characteristics.

[0090] For example, if it is detected that the signal energy of the audio signal played by the speaker of the display device is significantly attenuated below 80Hz, then its low-frequency lower limit (first frequency) is determined to be 80Hz. Then, the audio device dynamically sets the crossover point according to this low-frequency lower limit, for example, to 70Hz. In this way, the low-frequency signal (first audio signal) below 70Hz is played by the audio device, and the target audio signal is played by the speaker of the display device, which can ensure that the sound frequency bands of the two are reasonably connected and avoid sound field problems.

[0091] In this embodiment of the disclosure, by performing spectrum analysis on the ambient audio signal, the low-frequency lower limit (first frequency) of the speaker of the display device is determined, and then a more suitable target frequency is determined based on the first frequency to ensure that the sound frequency bands of the display device and the audio device are reasonably connected, and to avoid sound field problems (such as phase cancellation and sound field chaos between audio signals of the same frequency band played by the display device and the audio device at the same time).

[0092] In some embodiments of this disclosure, the controller is specifically configured to: output a plurality of first frequency options when the similarity is greater than or equal to a similarity threshold, each first frequency option indicating a second frequency; and, in response to a selection operation of a target first frequency option among the plurality of first frequency options, determine the second frequency indicated by the target first frequency option as the target frequency.

[0093] The second frequency indicated by each first frequency option can be preset and is not limited here.

[0094] In some embodiments of this disclosure, the audio device may output multiple first frequency options by voice, display multiple first frequency options, or output multiple first frequency options by other means, which are not limited here.

[0095] In this embodiment of the disclosure, the target frequency is determined by the user selecting the target frequency from a plurality of second frequencies, which makes the effect of the audio device playing the low-frequency signal in the target audio signal more in line with the user's needs and can improve the user experience.

[0096] In some embodiments of this disclosure, the controller is further configured to: after playing a first audio signal, in response to a frequency switching trigger operation, output a plurality of second frequency options, each second frequency option indicating a third frequency; in response to a selection operation of a target second frequency option among the plurality of second frequency options, separate a second audio signal from the target audio signal, the frequency of the second audio signal being less than or equal to the third frequency indicated by the target second frequency option; and play the second audio signal.

[0097] The third frequency indicated by each second frequency option can be preset or determined based on the first frequency; no limitation is made here.

[0098] In some embodiments of this disclosure, the audio device may output multiple second frequency options by voice, display multiple second frequency options, or output multiple second frequency options in other ways, which are not limited here.

[0099] In this embodiment of the disclosure, if the user is not satisfied with the playback effect of the first audio signal, the user selects a third frequency from multiple third frequencies as the frequency point for frequency division of the target audio signal, thereby obtaining a low-frequency signal (second audio signal) that satisfies the user. This makes the effect of the audio device playing the low-frequency signal in the target audio signal more in line with the user's needs and can improve the user experience.

[0100] In some embodiments of this disclosure, the controller is further configured to play the target audio signal if the similarity is less than the similarity threshold.

[0101] In this embodiment, the audio device compares the similarity between the collected ambient audio signal and the target audio signal received from the display device. If the similarity is less than a similarity threshold, it indicates that the display device itself is not playing the target audio signal. Therefore, the audio device needs to play the full frequency band of the target audio signal. This allows the device to determine whether to play only the low-frequency signal or the full frequency band audio signal based on the similarity between the ambient audio signal and the target audio signal. This increases the functionality of the audio device, improves its versatility, and reduces production costs.

[0102] In some embodiments of this disclosure, the controller is specifically configured to: determine that the audio device is in subwoofer mode when the similarity is greater than or equal to the similarity threshold; acquire a first audio signal from the target audio signal based on the subwoofer mode; determine that the audio device is in full-range playback mode when the similarity is less than the similarity threshold; and play the target audio signal based on the full-range playback mode.

[0103] The subwoofer mode is used to instruct the audio equipment to play the low-frequency signal in the target audio signal, so it is necessary to obtain the first audio signal from the target audio signal.

[0104] The full-range playback mode is used to instruct the audio equipment to play the target audio signal, so the target audio signal needs to be played.

[0105] In this embodiment, a subwoofer mode and a full-range playback mode are provided for the audio device. This allows the audio device to switch between the subwoofer mode and the full-range playback mode according to actual usage needs, enabling the audio device to better distinguish different playback functions and achieve different playback effects.

[0106] The audio equipment provided in this embodiment is flexible and highly compatible. It can compare ambient audio signals with target audio signals to determine whether it is in subwoofer mode or full-range playback mode. No modifications to display devices (such as televisions) are required, and it is compatible with speaker configurations on all display devices, demonstrating broad technical applicability.

[0107] For example, the communication connection can be a wired connection between the audio equipment and the AUX of the display device. This disclosure provides an adaptive subwoofer system that does not require modification of the display device, such as... Figure 4 As shown, the audio equipment includes the following core technology modules: an audio input module 401, used to receive audio signals from the display device via an AUX interface; an audio processing module 402, used to collect ambient audio signals via a microphone, perform audio signal similarity analysis with the AUX input signal, and identify whether the ambient audio signal is a sound source from the TV speaker; a mode switching module 403, which switches the working mode of the audio equipment according to the audio signal acquisition and comparison results. When the ambient audio signal is determined to be the TV audio output, it switches to subwoofer mode; when it is determined to be the headphone jack output of a mobile phone or other device, it switches to full-range playback mode; a dynamic frequency division control module 404, used to determine the frequency division point based on the low-frequency lower limit detection result of the TV speaker, and output the frequency division command to the digital signal processor (DSP) to perform frequency division processing on the audio signal; and an audio output module 405, used to output low-frequency signals in subwoofer mode and output the target audio signal in full-range playback mode.

[0108] For example, such as Figure 5 The diagram shows the structure of an audio device 500, which includes a microphone 501, an AUX interface 502, and a subwoofer unit 503. Figure 6 The diagram shows the connection between the audio equipment and the AUX interface of the 600 mobile phone. In this case, the audio equipment is in full-range playback mode. Figure 7The diagram shows the connection between the audio device 500 and the AUX interface of the 2.0 channel first television 701. The target audio signal is filtered by the first low-pass filter 702 to obtain audio signal 1, and the frequency of audio signal 1 is less than or equal to frequency 1. Figure 8 The diagram shows the connection between the audio device 500 and the AUX interface of the 2.1-channel second television 801. The target audio signal is filtered by the second low-pass filter 802 to obtain audio signal 2. The frequency of audio signal 2 is less than or equal to frequency 2, and frequency 1 is greater than frequency 2. In both cases, the television audio output option is switched to the mode where the external speakers and television speakers output together, and the audio device 500 is in subwoofer mode. Figure 9 As shown, the speaker has multiple fixed crossover point modes built in, such as the first audio mode 901 (60Hz), the second audio mode 902 (50Hz), and the third audio mode 903 (40Hz). If the automatic mode does not meet the user's preference for bass effect or if the automatic recognition fails, different low-frequency modes can be manually switched.

[0109] This embodiment can be applied to all display devices that support synchronous output from display device speakers and audio equipment. It effectively utilizes the high-performance subwoofer configuration of the audio equipment, expands the application scenarios of the audio equipment, and maximizes its utilization value. The audio equipment accurately determines whether the usage mode is subwoofer mode or full-range playback mode by actively comparing the audio signal from the display device with the ambient audio signal, and switches between modes accordingly. The audio equipment also dynamically sets the crossover point for the audio signal from the display device by actively detecting the low-frequency lower limit of the display device's speakers, thus optimizing low-frequency signal processing. Moreover, relying on the audio equipment's own functions, no modification to the display device is required, exhibiting broad technical applicability and compatibility.

[0110] To illustrate this solution in more detail, the following will use examples to illustrate it. Figure 10 To explain, it is understandable that Figure 10 The steps involved may include more or fewer steps in actual implementation, and the order of these steps may also be different, as long as the audio signal playback method provided in the embodiments of this disclosure can be achieved. A detailed description of the audio signal playback method provided in the embodiments of this disclosure can be found in the relevant description of the above-mentioned display device, and the same or similar technical effects can be achieved, which will not be repeated here.

[0111] Figure 10 The present invention provides a flowchart of steps for implementing an audio signal playback method according to one or more embodiments of the present disclosure. The method is applied to an audio device that is communicatively connected to a display device. The audio signal playback method may include the following steps S1001 to S1005.

[0112] S1001. Receive a target audio signal from the display device through the communication connection. The target audio signal includes audio signals of different frequency bands.

[0113] S1002, Collect ambient audio signals through a microphone.

[0114] S1003. Determine the similarity between the environmental audio signal and the target audio signal.

[0115] S1004. If the similarity is greater than or equal to the similarity threshold, obtain the first audio signal from the target audio signal.

[0116] In this context, the frequencies of the first audio signals are all less than or equal to the target frequency.

[0117] S1005, Play the first audio signal.

[0118] In some embodiments of this disclosure, the above-mentioned S1004 can be specifically implemented by the following S1004a and S1004b.

[0119] S1004a. If the similarity is greater than or equal to the similarity threshold, determine the target frequency.

[0120] S1004b: Separate a first audio signal from the target audio signal, the first audio signal having a frequency less than or equal to the target frequency.

[0121] In some embodiments of this disclosure, the above-mentioned S1004a can be specifically implemented by the following S1004a1 to S1004a3.

[0122] S1004a1. When the similarity is greater than or equal to the similarity threshold, perform spectral analysis on the environmental audio signal.

[0123] S1004a2, The first frequency corresponding to the frequency point where the ratio of frequency energy to peak energy is equal to the ratio threshold is determined as the lowest frequency of the speaker of the display device.

[0124] S1004a3. Based on the first frequency, determine the target frequency, which is less than or equal to the first frequency.

[0125] In some embodiments of this disclosure, the above-mentioned S1004a can be specifically implemented by the following S1004a4 to S1004a5.

[0126] S1004a4. If the similarity is greater than or equal to the similarity threshold, multiple first frequency options are displayed, each first frequency option indicating a second frequency.

[0127] S1004a5, In response to the selection operation of the target first frequency option among the plurality of first frequency options, the second frequency indicated by the target first frequency option is determined as the target frequency.

[0128] In some embodiments of this disclosure, after S1005, the audio signal playback method provided in the embodiments of this disclosure may further include the following S1006 to S1008.

[0129] S1006. In response to a frequency switching trigger operation, multiple second frequency options are displayed, each second frequency option indicating a third frequency.

[0130] S1007. In response to a triggering operation of a target second frequency option among the plurality of second frequency options, a second audio signal is separated from the target audio signal, the frequency of the second audio signal being less than or equal to the third frequency indicated by the target second frequency option.

[0131] S1008, Play the second audio signal.

[0132] In some embodiments of this disclosure, after S1003, the audio signal playback method provided in the embodiments of this disclosure may further include the following S1009.

[0133] S1009. If the similarity is less than the similarity threshold, play the target audio signal.

[0134] In some embodiments of this disclosure, the above-mentioned S1004 can be specifically implemented by the following S1004c and S1004d.

[0135] S1004c: If the similarity is greater than or equal to the similarity threshold, determine that the audio device is in subwoofer mode.

[0136] S1004d: Based on the subwoofer mode, obtain the first audio signal from the target audio signal.

[0137] In some embodiments of this disclosure, the above-mentioned S1009 can be specifically implemented by the following S1009a and S1009b.

[0138] S1009a. If the similarity is less than the similarity threshold, determine that the audio device is in full-frequency playback mode.

[0139] S1009b: Based on the full-frequency playback mode, play the target audio signal.

[0140] The present invention also provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the various processes of the above-described audio signal playback method and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0141] The computer-readable storage medium can be a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, etc.

[0142] The present invention provides a computer program product, comprising: when the computer program product is run on a computer, causing the computer to implement the above-described audio signal playback method.

[0143] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit them. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this disclosure.

[0144] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific use considerations.

Claims

1. An audio device that communicates with a display device; characterized in that, The audio equipment includes: The controller is configured to receive a target audio signal from the display device via the communication connection, the target audio signal comprising audio signals of different frequency bands; Collect ambient audio signals using a microphone; Determine the similarity between the environmental audio signal and the target audio signal; If the similarity is greater than or equal to the similarity threshold, a first audio signal is obtained from the target audio signal, wherein the frequency of the first audio signal is less than or equal to the target frequency. Play the first audio signal.

2. The audio equipment according to claim 1, characterized in that, The controller is specifically configured as follows: If the similarity is greater than or equal to the similarity threshold, the target frequency is determined. Separate the first audio signal from the target audio signal whose frequency is less than or equal to the target frequency.

3. The audio equipment according to claim 2, characterized in that, The controller is specifically configured as follows: When the similarity is greater than or equal to the similarity threshold, spectral analysis is performed on the environmental audio signal; The first frequency corresponding to the frequency point where the ratio of frequency energy to peak energy is equal to the ratio threshold is determined as the lowest frequency of the speaker of the display device; Based on the first frequency, the target frequency is determined, wherein the target frequency is less than or equal to the first frequency.

4. The audio equipment according to claim 2, characterized in that, The controller is specifically configured as follows: If the similarity is greater than or equal to the similarity threshold, multiple first frequency options are output, each first frequency option indicating a second frequency; In response to the selection operation of a target first frequency option among the plurality of first frequency options, the second frequency indicated by the target first frequency option is determined as the target frequency.

5. The audio equipment according to claim 1, characterized in that, The controller is also configured to: After the first audio signal is played, in response to the trigger operation of switching frequencies, a plurality of second frequency options are output, each second frequency option being used to indicate a third frequency; In response to the selection operation of a target second frequency option among the plurality of second frequency options, a second audio signal is separated from the target audio signal, the frequency of the second audio signal being less than or equal to the third frequency indicated by the target second frequency option; Play the second audio signal.

6. The audio device according to any one of claims 1-5, characterized in that, The controller is also configured to: If the similarity is less than the similarity threshold, the target audio signal is played.

7. The audio device according to claim 6, characterized in that, The controller is specifically configured as follows: If the similarity is greater than or equal to the similarity threshold, the audio device is determined to be in subwoofer mode; Based on the subwoofer mode, a first audio signal is obtained from the target audio signal; If the similarity is less than the similarity threshold, the audio device is determined to be in full-frequency playback mode. The target audio signal is played based on the full-frequency playback mode.

8. An audio signal playback method, applied to an audio device that is communicatively connected to a display device, characterized in that, include: The target audio signal, which includes audio signals of different frequency bands, is received from the display device via the communication connection. Collect ambient audio signals using a microphone; Determine the similarity between the environmental audio signal and the target audio signal; If the similarity is greater than or equal to the similarity threshold, a first audio signal is obtained from the target audio signal, wherein the frequency of the first audio signal is less than or equal to the target frequency. Play the first audio signal.

9. The method according to claim 8, characterized in that, The step of obtaining a first audio signal from the target audio signal when the similarity is greater than or equal to a similarity threshold includes: If the similarity is greater than or equal to the similarity threshold, the target frequency is determined. Separate the first audio signal from the target audio signal whose frequency is less than or equal to the target frequency.

10. The method according to claim 9, characterized in that, Determining the target frequency when the similarity is greater than or equal to the similarity threshold includes: When the similarity is greater than or equal to the similarity threshold, spectral analysis is performed on the environmental audio signal; The first frequency corresponding to the frequency point where the ratio of frequency energy to peak energy is equal to the ratio threshold is determined as the lowest frequency of the speaker of the display device; Based on the first frequency, the target frequency is determined, wherein the target frequency is less than or equal to the first frequency.

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