Audio processing method, system and device and readable storage medium

Abstract

The embodiment of the invention discloses an audio processing method, system and device and a readable storage medium, and the method comprises the steps: obtaining a target audio signal and an ultrasonic signal, carrying out the gain processing of the target audio signal and the ultrasonic signal, inputting the processed signals into a sound mixer, obtaining a first audio signal, and obtaining a second audio signal; sequentially carrying out amplitude limiting and filtering processing on the basis of the first audio signal to obtain a second audio signal, carrying out up-mixing processing on the second audio signal to obtain a third audio signal, playing the third audio signal through a loudspeaker of a target sound area, and playing the third audio signal through a loudspeaker of the target sound area, and each candidate sound area is provided with a corresponding loudspeaker. Therefore, the independent playing of the audio is realized, newly added hardware is avoided, and the cost consumption during the independent playing of the audio is reduced.

Description

Technical Field

[0001] The present invention relates to the field of data processing technology, and in particular to an audio processing method, system, device and readable storage medium. Background Art

[0002] With the continuous advancement of automotive electronics, consumers are demanding increasingly comfortable in-car audio processing. Passengers in different seats in a car cabin often disturb each other due to the sound played through the speakers. For example, when the navigation sound is played only for the driver, it can be heard by passengers in the back seat, disturbing their rest. Existing technology generally achieves this by adding a new speaker to play the navigation sound independently. However, this approach increases hardware costs. Summary of the Invention

[0003] In view of this, embodiments of the present invention provide an audio processing method, system, device, and readable storage medium to achieve independent audio playback without increasing hardware costs, thereby reducing the cost of independent audio playback.

[0004] In a first aspect, an audio processing method is provided, the method comprising:

[0005] Acquire target audio signals and ultrasonic signals;

[0006] Performing gain processing on the target audio signal and the ultrasonic signal respectively and then inputting the resultant signals into a mixer to obtain a first audio signal;

[0007] performing limiting and filtering processing on the first audio signal in sequence to obtain a second audio signal;

[0008] performing upmixing processing on the second audio signal to obtain a third audio signal;

[0009] The third audio signal is played through a speaker in a target sound zone, where the target sound zone is determined from a plurality of candidate sound zones, and each of the candidate sound zones has a corresponding speaker.

[0010] In some embodiments, the frequency of the ultrasonic signal is determined based on characteristics of the speaker;

[0011] Generating the ultrasonic signal includes:

[0012] Generate the ultrasonic signal by a single tone generator; or

[0013] The ultrasonic signal is generated by looping and playing the ultrasonic file.

[0014] In some embodiments, obtaining the first audio signal includes:

[0015] sampling the target audio signal and the ultrasonic signal based on a specific sampling frequency;

[0016] The average value of the target audio signal and the ultrasonic signal at each sampling point is determined by a mixer to determine the first audio signal.

[0017] In some embodiments, the step of sequentially performing limiting and filtering processing on the first audio signal to obtain the second audio signal includes:

[0018] performing a limiting process on the first audio signal by a limiter;

[0019] The first audio signal after the amplitude limiting processing is filtered through a filter to obtain a second audio signal.

[0020] In some embodiments, each of the speakers has a corresponding switch and / or mute device;

[0021] The method further comprises:

[0022] Use a switch to turn off the speakers in non-target sound zones; or

[0023] The third audio signal played in the loudspeaker in the non-target sound zone is muted by the muting device.

[0024] In a second aspect, an audio processing system is provided, the system comprising:

[0025] An input unit, used for acquiring target audio signals and ultrasonic signals;

[0026] a modulation unit, comprising at least one gainer, a mixer, a limiter, and a filter, configured to perform gain processing on the target audio signal and the ultrasonic signal, respectively, and then input the gain processing to the mixer to obtain a first audio signal; and perform limiting and filtering processing on the first audio signal in sequence through the limiter and the filter to obtain a second audio signal;

[0027] The output unit includes an upmixer and at least one speaker, and is configured to upmix the second audio signal through the upmixer to obtain a third audio signal, and play the third audio signal through a speaker in a target sound zone, where the target sound zone is determined from a plurality of candidate sound zones, each of the candidate sound zones having a corresponding speaker.

[0028] In some embodiments, each of the speakers has a corresponding switch and / or mute device.

[0029] In some embodiments, each of the speakers is directed toward an area where a human ear is located within the corresponding candidate sound zone.

[0030] According to a third aspect, an audio processing device is provided, the device comprising:

[0031] A first acquisition module is configured to acquire a target audio signal and an ultrasonic signal;

[0032] a second acquisition module configured to perform gain processing on the target audio signal and the ultrasonic signal respectively and then input the resultant signals into a mixer to acquire a first audio signal;

[0033] a third acquisition module, configured to perform limiting and filtering processing in sequence on the first audio signal to acquire a second audio signal;

[0034] a fourth acquisition module, configured to perform upmixing processing on the second audio signal to obtain a third audio signal;

[0035] The playing module is configured to play the third audio signal through a speaker in a target sound zone, where the target sound zone is determined from a plurality of candidate sound zones, and each candidate sound zone has a corresponding speaker.

[0036] According to a fourth aspect, a vehicle is provided, comprising:

[0037] Vehicle body;

[0038] As in the audio processing system described in the second aspect, each of the speakers has a corresponding candidate sound zone, and each of the speakers has a corresponding switch and / or mute device.

[0039] In a fifth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method described in the first aspect is implemented.

[0040] According to a sixth aspect, a computer program product is provided. When the computer program product is run on a computer, the computer is caused to execute the method according to the first aspect.

[0041] The embodiment of the present invention obtains a target audio signal and an ultrasonic signal, performs gain processing on each of the target audio signal and the ultrasonic signal, and then inputs the signal into a mixer to obtain a first audio signal. Based on the first audio signal, the signal is sequentially limited and filtered to obtain a second audio signal. The second audio signal is upmixed to obtain a third audio signal, and the third audio signal is played through a speaker in a target audio zone, where the target audio zone is determined from a plurality of candidate audio zones, each of which has a corresponding speaker. Thus, independent audio playback is achieved, the addition of new hardware is avoided, and the cost of independent audio playback is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0043] Figure 1 is a schematic diagram of an audio processing system according to an embodiment of the present invention;

[0044] Figure 2 is a flowchart of an audio processing method according to an embodiment of the present invention;

[0045] Figure 3 is a flowchart of obtaining a first audio signal according to an embodiment of the present invention;

[0046] Figure 4 is a schematic diagram of an audio processing device according to an embodiment of the present invention;

[0047] Figure 5 Schematic diagram of a vehicle according to an embodiment of the present invention. DETAILED DESCRIPTION

[0048] The present application is described below based on the following embodiments, but the present application is not limited to these embodiments. In the detailed description of the present application below, certain specific details are described in detail. Those skilled in the art can fully understand the present application without the description of these details. To avoid obscuring the essence of the present application, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0049] Furthermore, persons of ordinary skill in the art will appreciate that the figures provided herein are for illustration purposes only and are not necessarily drawn to scale.

[0050] At the same time, it should be understood that in the following description, "circuit" refers to a conductive loop composed of at least one element or subcircuit connected electrically or electromagnetically. When an element or circuit is said to be "connected to" another element or an element / circuit is said to be "connected" between two nodes, it can be directly coupled or connected to the other element or there can be intermediate elements. The connection between the elements can be physical, logical, or a combination thereof. Conversely, when an element is said to be "directly coupled to" or "directly connected to" another element, it means that there are no intermediate elements between the two.

[0051] Unless the context clearly requires otherwise, words like “include”, “comprising” and the like throughout this application should be interpreted as including rather than exclusive or exhaustive; that is, as meaning “including but not limited to”.

[0052] In the description of this application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance. In addition, in the description of this application, unless otherwise specified, "plurality" means two or more.

[0053] Where the solutions described in this specification and in the examples involve the processing of personal information, such processing will be conducted with a legitimate basis (e.g., with the consent of the personal information subject or as necessary for the performance of a contract) and only within the prescribed or agreed scope. A user's refusal to process personal information other than that required for basic functions will not affect the user's use of these basic functions.

[0054] Figure 1 is a schematic diagram of an audio processing system according to an embodiment of the present invention, Figure 1 In the illustrated embodiment, the audio processing system includes an input unit 11 , a modulation unit 12 and an output unit 13 .

[0055] In some implementations, the input unit 11 is used to obtain the target audio signal 111 and the ultrasonic signal 112. Specifically, this embodiment can collect the sound played by the in-vehicle audio player to obtain the target audio signal 111 and the ultrasonic signal 112.

[0056] Target audio signal 111 represents the sound desired by users in the corresponding candidate audio zones, where the candidate audio zones are defined by the seating arrangements within the vehicle cabin. Target audio signal 111 can represent navigation sounds desired by the driver, or music, video, or other sounds desired by passengers in a specific area. In some embodiments, ultrasonic signal 112 can be generated by looping an ultrasonic file, or by using a single-tone generator and then played back via an in-vehicle audio player.

[0057] In some implementations, the specific frequency of the ultrasonic signal 112 played can be determined based on the characteristics of the speaker. Specifically, the specific frequency of the ultrasonic signal 112 used can be selected based on the frequency response curve of the speaker, so as to better achieve directional propagation of audio, improve audio quality, optimize system efficiency, and avoid resonance and interference. For example, if the frequency response curve of the speaker is significantly attenuated when it reaches 22KHz, a sine wave with a frequency within 22KHz is preferably selected as the ultrasonic signal 112. This can make the ultrasonic signal have a longer wavelength, which is easier to propagate in a direction. At the same time, it can also more accurately restore the sound, avoid the speaker's inability to effectively convert sound in the area where the frequency response curve is attenuated, resulting in energy loss, and avoid the speaker's resonance caused by the ultrasonic signal's high frequency.

[0058] The modulation unit 12 includes a gainer 121, a gainer 122, a mixer 123, a limiter 124 and a filter 125. The modulation unit 12 is used to input the target audio signal 111 and the ultrasonic signal 112 into the mixer 123 after performing gain processing through the gainers 121 and 122 respectively to obtain the first audio signal S1.

[0059] In some implementations, only one gainer 121 may be provided in the modulation unit 12 , and gain processing of the target audio signal 111 and the ultrasonic signal 112 is completed by the gainer 121 , and then input into the mixer 123 .

[0060] After gain processing is performed on the target audio signal 111 and the ultrasonic signal 112, further mixing processing is performed by the mixer 123. Specifically, this embodiment can sample the target audio signal 111 and the ultrasonic signal 112 after gain processing based on a specific sampling frequency, and determine the average value of the target audio signal 111 and the ultrasonic signal 112 at each sampling point through the mixer 123. The specific value of the specific sampling frequency is set based on the ultrasonic signal. The target audio signal and the ultrasonic signal after gain processing are then sampled based on this specific value. This can avoid aliasing and distortion of the collected ultrasonic signal. Furthermore, this embodiment determines the waveform represented by the average value of each sampling point as the first audio signal S1. The average value can be an arithmetic mean or a weighted average calculated by assigning corresponding weights to the target audio signal 111 and the ultrasonic signal 112. The specific weight value can be determined according to actual conditions and is not limited in this embodiment. Thus, this embodiment performs mixing processing on the target audio signal 111 and the ultrasonic signal 112.

[0061] Furthermore, the modulation unit 12 is further configured to sequentially perform limiting and filtering processing on the first audio signal S1 via a limiter 124 and a filter 125 to obtain a second audio signal S2. In some implementations, this embodiment may limit the first audio signal S1 via the limiter 124 to prevent amplitude clipping distortion of the first audio signal S1. Specifically, the limiter 124 detects the amplitude of the audio signal output by the limiter 124 in real time. When the amplitude exceeds a maximum threshold, the limiter 124 adjusts the input gain of the limiter 124 to reduce the amplitude of the input first audio signal S1, thereby limiting the amplitude of the audio signal output by the limiter 124 to within the maximum threshold. This avoids audio data clipping distortion and improves audio quality and communication transmission performance. In some implementations, the limiter can be any of a variety of existing limiters, such as a hard limiter, a soft limiter, a peak limiter, an adaptive limiter, and a multi-band limiter. In practical applications, the limiter can be selected based on actual needs, and this embodiment is not limited to this.

[0062] After the first audio signal S1 is limited by the limiter 124, the filter 125 further filters the first audio signal S1 after limiting to remove invalid frequency bands in the first audio signal S1 while retaining valid audio frequency bands, thereby obtaining the second audio signal S2. Specifically, this embodiment does not limit the filter used, and the filter type can be selected based on actual needs. For example, one or more of a low-pass filter, a high-pass filter, and a band-pass filter can be selected for filtering. For example, a band-pass filter can be used to filter out sounds above or below the valid audio frequency band. The band-pass filter can be an existing band-pass filter such as an FIR finite impulse response filter or an IIR infinite impulse response filter, and this embodiment is not limited to this.

[0063] The output unit 13 includes an upmixer 131 and at least one speaker. The specific number of speakers can be determined based on actual requirements such as the configuration of candidate sound zones, and this embodiment is not limited thereto. The following description primarily assumes that the output unit 13 includes speakers 132 and 133. The output unit 13 is configured to upmix the second audio signal S2 via the upmixer 131 to obtain a third audio signal S3, and to play the third audio signal S3 via a speaker in a target sound zone. The target sound zone is determined from a plurality of candidate sound zones, each of which has a corresponding speaker.

[0064] Among them, the candidate sound zones are different areas divided according to the seats in the car cabin. For example, the driver's seat can be divided into a candidate sound zone, and other areas where passengers are located can be divided into candidate sound zones. Alternatively, each seat position can be used as a candidate sound zone, or the candidate sound zones can be divided based on the front and rear rows. It should be understood that the specific division method of the candidate sound zones can be determined according to actual needs, and this embodiment does not limit this.

[0065] In some embodiments, each speaker has a corresponding switch and / or mute device. The target sound zone is the area where the third audio signal S3 is expected to be heard. For example, when the speaker of a candidate sound zone is turned on, the candidate sound zone is determined to be the target sound zone, and the third audio signal S3 is then played from the speaker corresponding to the candidate sound zone. For example, when the target sound zone is the sound zone corresponding to the driver's seat, the target audio signal 111 is navigation sound, and the speaker 132 corresponding to the target sound zone is turned on, the third audio signal S3 obtained by processing the target audio signal 111 is played through the speaker 132.

[0066] In this embodiment, the speaker in the non-target sound zone can be turned off by a switch, or the third audio signal S3 played by the speaker 133 in the non-target sound zone can be muted by a mute device, thereby ensuring that people in the non-target area cannot hear the third audio signal S3. In this way, independent audio playback is achieved.

[0067] The switch device may be a physical switch or a touch control. The mute device may be a device capable of playing a fourth audio signal having a waveform opposite to that of the third audio signal S3, or may be any existing mute device. This embodiment does not limit the specific form of the mute device, as long as it can mute the third audio signal S3.

[0068] In some implementations, each speaker may be directed toward the human ear region within the corresponding candidate sound zone, so that when the third audio signal S3 is played through the speaker 132 in the target sound zone, people in the corresponding area can more clearly and accurately hear the target audio signal 111 while avoiding interference with people in other candidate sound zones. For example, a speaker may be installed on the headrest corresponding to each seat, or in a vehicle door or interior ceiling corresponding to each seat, and directed toward the human ear region within the region.

[0069] It should be understood that an ultrasonic signal is a sound wave with a frequency higher than 20 kHz. Due to its high frequency, its directional transmission characteristics are enhanced, while its diffraction characteristics are weakened, resulting in good directivity. In this embodiment, the ultrasonic signal 112 is used as a carrier to carry the target audio signal 111, that is, the sound of 20 Hz to 20 kHz that can be heard by the human ear, and then the speaker 132 in the target sound zone is used to play the mixture of the target audio signal 111 and the ultrasonic signal, that is, the third audio signal S3. This can make the target audio signal 111 also have good directivity, thereby avoiding the target audio signal 111 from interfering with people in the non-target sound zone.

[0070] It's easy to understand that although the third audio signal S3 is a mixture of the target audio signal 111 and the ultrasonic signal, ultrasonic signals are sound waves with frequencies above 20 kHz. The human ear's hearing range is between 20 Hz and 20 kHz. The eardrum's frequency response to ultrasonic waves above 20 kHz is very small, making them essentially inaudible to the human ear. Therefore, the human ear automatically filters out ultrasonic signals 112 above 20 kHz, retaining the target audio signal 111 below 20 kHz carried by the ultrasonic signal, allowing people in the target audio range to hear the target audio signal 111.

[0071] The embodiment of the present invention obtains a target audio signal and an ultrasonic signal, performs gain processing on each of the target audio signal and the ultrasonic signal, and then inputs the signal into a mixer to obtain a first audio signal. Based on the first audio signal, the signal is sequentially limited and filtered to obtain a second audio signal. The second audio signal is upmixed to obtain a third audio signal, and the third audio signal is played through a speaker in a target audio zone, where the target audio zone is determined from a plurality of candidate audio zones, each of which has a corresponding speaker. Thus, independent audio playback is achieved, the addition of new hardware is avoided, and the cost of independent audio playback is reduced.

[0072] Figure 2 is a flow chart of an audio processing method according to an embodiment of the present invention. Figure 2 As shown, the audio processing method of the embodiment of the present invention includes the following steps:

[0073] Step S210: Acquire target audio signals and ultrasonic signals.

[0074] Specifically, this embodiment collects target audio and ultrasonic waves played by the in-vehicle audio player to obtain target audio signals and ultrasonic waves.

[0075] The target audio signal is the sound that people in the corresponding audio zone want to hear, such as navigation sounds that drivers need to hear, or music or video sounds that passengers need to hear. In some embodiments, the ultrasonic signal can be generated by looping an ultrasonic file, or by a single tone generator.

[0076] In some implementations, the specific frequency of the ultrasonic signal can be determined based on the characteristics of the speaker. Specifically, the specific frequency of the ultrasonic signal can be selected based on the speaker's frequency response curve, thereby better directional audio propagation, improving audio quality, optimizing system efficiency, and avoiding resonance and interference.

[0077] Step S220 : Perform gain processing on the target audio signal and the ultrasonic signal respectively, and then input the processed signals into a mixer to obtain a first audio signal.

[0078] Specifically, the step of obtaining the first audio signal is as follows: Figure 3 As shown, specifically including:

[0079] Step S310: sampling the target audio signal and ultrasonic signal based on a specific sampling frequency.

[0080] Specifically, a specific value of the specific sampling frequency is set based on the ultrasonic signal, and then the target audio signal and the ultrasonic signal processed by the gainer are sampled based on the specific value, thereby avoiding distortion of the collected ultrasonic signal caused by aliasing.

[0081] Step S320: Determine the average value of the target audio signal and the ultrasonic signal at each sampling point through a mixer to determine a first audio signal.

[0082] The average value may be an arithmetic average value or a weighted average value calculated by assigning corresponding weights to the target audio signal and the ultrasonic signal. The specific weight values ​​may be determined according to actual conditions and are not limited in this embodiment. Thus, this embodiment performs mixing processing on the target audio signal and the ultrasonic signal.

[0083] Step S230: performing limiting and filtering processing in sequence based on the first audio signal to obtain a second audio signal.

[0084] In some implementations, this embodiment may input the first audio signal into a limiter to limit the first audio signal to prevent amplitude clipping distortion of the first audio signal. The first audio signal after the limiting process may be filtered using a filter to remove invalid frequency bands in the first audio signal and retain valid audio frequency bands, thereby obtaining a second audio signal.

[0085] Step S240: Upmix the second audio signal to obtain a third audio signal.

[0086] Step S250 : playing the third audio signal through a speaker in a target sound zone, where the target sound zone is determined from a plurality of candidate sound zones, and each candidate sound zone has a corresponding speaker.

[0087] The candidate sound zones are areas divided based on the seats in the vehicle cabin. For example, the driver's seat can be divided into a candidate sound zone, and other areas where passengers are located can be divided into candidate sound zones. Alternatively, each seat position can be a candidate sound zone, or the candidate sound zones can be divided based on the front and rear rows. It should be understood that the specific division method of the candidate sound zones can be determined according to actual needs and is not limited in this embodiment. Each of the speakers has a corresponding switch and / or mute device. The target sound zone is the area where the third audio signal is expected to be heard. When the speaker in a candidate sound zone is turned on, the candidate sound zone is determined to be the target sound zone, and the third audio signal is then played from the speaker corresponding to the candidate sound zone.

[0088] In some implementations, this embodiment can control the speakers in the non-target sound zone to be turned off by a switch, or use a mute device to mute the third audio signal played by the speakers in the non-target sound zone, thereby ensuring that people in the non-target area cannot hear the third audio signal. In this way, independent audio playback is achieved.

[0089] In some implementations, each of the speakers can be directed toward the area where human ears are located in the corresponding candidate sound zone, so that when the third audio signal is played through the speakers in the target sound zone, people in the corresponding area can hear the target audio signal more clearly and accurately, while avoiding interference with people in other candidate sound zones.

[0090] The embodiment of the present invention obtains a target audio signal and an ultrasonic signal, performs gain processing on each of the target audio signal and the ultrasonic signal, and then inputs the signal into a mixer to obtain a first audio signal. Based on the first audio signal, the signal is sequentially limited and filtered to obtain a second audio signal. The second audio signal is upmixed to obtain a third audio signal, and the third audio signal is played through a speaker in a target audio zone, where the target audio zone is determined from a plurality of candidate audio zones, each of which has a corresponding speaker. Thus, independent audio playback is achieved, the addition of new hardware is avoided, and the cost of independent audio playback is reduced.

[0091] Figure 4 FIG is a schematic diagram of an audio processing device according to an embodiment of the present invention. Figure 4 As shown, the audio processing device according to the embodiment of the present invention includes a first acquisition module 41 , a second acquisition module 42 , a third acquisition module 43 , a fourth acquisition module 44 and a playing module 45 .

[0092] Among them, the first acquisition module 41 is configured to obtain a target audio signal and an ultrasonic signal. The second acquisition module 42 is configured to perform gain processing on the target audio signal and the ultrasonic signal respectively and then input them into the mixer to obtain a first audio signal. The third acquisition module 43 is configured to perform limiting and filtering processing in sequence based on the first audio signal to obtain a second audio signal. The fourth acquisition module 44 is configured to perform upmix processing on the second audio signal to obtain a third audio signal. The playback module 45 is configured to play the third audio signal through a speaker in a target sound zone, and the target sound zone is determined from a plurality of candidate sound zones, and each candidate sound zone has a corresponding speaker. Among them, the frequency of the ultrasonic signal is determined based on the characteristics of the speaker. The speaker has a corresponding switch and / or mute device.

[0093] In some embodiments, the second acquisition module 42 further includes a sampling unit and a determination unit, wherein the sampling unit is configured to sample the target audio signal and the ultrasonic signal based on a specific sampling frequency. The determination unit is configured to determine, through a mixer, an average value of the target audio signal and the ultrasonic signal at each sampling point to determine the first audio signal.

[0094] In some embodiments, the third acquisition module 43 further includes a limiting processing module and a filtering processing module, wherein the limiting processing module is configured to perform limiting processing on the first audio signal through a limiter, and the filtering processing module is configured to perform filtering processing on the first audio signal after limiting processing through a filter to obtain a second audio signal.

[0095] In some embodiments, the audio processing device further comprises a first generating unit, a second generating unit, a control unit, and a mute unit. The first generating unit is configured to generate the ultrasonic signal using a single tone generator. The second generating unit is configured to generate the ultrasonic signal by looping and playing an ultrasonic file.

[0096] The control unit is configured to control the speakers of the non-target sound zone to be turned off through a switch. The mute unit is configured to mute the third audio signal played in the speakers of the non-target sound zone through a mute device.

[0097] The embodiment of the present invention obtains a target audio signal and an ultrasonic signal, performs gain processing on each of the target audio signal and the ultrasonic signal, and then inputs the signal into a mixer to obtain a first audio signal. Based on the first audio signal, the signal is sequentially limited and filtered to obtain a second audio signal. The second audio signal is upmixed to obtain a third audio signal, and the third audio signal is played through a speaker in a target audio zone, where the target audio zone is determined from a plurality of candidate audio zones, each of which has a corresponding speaker. Thus, independent audio playback is achieved, the addition of new hardware is avoided, and the cost of independent audio playback is reduced.

[0098] Figure 5 FIG is a schematic diagram of a vehicle according to an embodiment of the present invention. Figure 5 As shown, the vehicle of the embodiment of the present invention includes a vehicle body 5 and an audio processing system 51 described in the embodiment of the present invention. Each speaker in the audio processing system 51 has a corresponding candidate sound zone, and each speaker has a corresponding switch and / or mute device.

[0099] In some implementations, each speaker within the audio processing system 51 can be oriented toward the human ear region within the corresponding candidate sound zone. This allows people in the target sound zone to hear the target audio signal more clearly and accurately when the speakers in the target sound zone are played, while preventing interference from the target audio signal with people in other candidate sound zones. For example, speakers can be installed on the headrests corresponding to each seat, or in locations such as the doors or the interior ceiling of the vehicle, depending on actual needs, and oriented toward the human ear region within that area. The number of speakers corresponding to each seat within the vehicle body 5 can be set based on actual needs, and the number of speakers corresponding to each seat can be the same or different, and this embodiment is not limited to this.

[0100] In some embodiments, people in the vehicle body 5 select the target sound zone by controlling the opening and closing of the speakers corresponding to each candidate sound zone in the audio processing system 51. The audio processing system processes the target audio signal and the ultrasonic signal according to any of the above-mentioned embodiments, and then outputs the corresponding audio signal to the speaker of the target sound zone. Alternatively, after outputting the corresponding audio signal to the speakers of all candidate sound zones, the audio signal is muted by the mute device in the speaker of the non-target sound zone, thereby ensuring that people in the target sound zone can hear the corresponding audio signal and avoiding the corresponding audio signal from disturbing people in the non-target sound zone, thereby achieving independent audio playback.

[0101] It will be understood by those skilled in the art that the embodiments of the present application may be provided as methods, devices (equipment), or computer program products. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-readable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0102] The present application is described with reference to flowcharts of methods, apparatuses (devices), and computer program products according to embodiments of the present application. It should be understood that each process in the flowcharts can be implemented by computer program instructions.

[0103] These computer program instructions may be stored in a computer-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device that implements the process Figure 1 A function specified in a process or multiple processes.

[0104] These computer program instructions can also be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce the instructions for implementing the process Figure 1 A device that specifies functions in a process or multiple processes.

[0105] Another embodiment of the present invention relates to a non-volatile storage medium for storing a computer-readable program, wherein the computer-readable program is used for a computer to control corresponding devices in an audio processing system to execute part or all of the above method embodiments.

[0106] That is, those skilled in the art will understand that all or part of the steps in the above-mentioned embodiments can be implemented by specifying relevant hardware through a program, which is stored in a storage medium and includes a number of instructions for causing a device (which may be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps of the methods described in the embodiments of the present application. The aforementioned storage medium includes: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, etc., various media that can store program code.

[0107] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An audio processing method, characterized in that: The method comprises: Acquire target audio signals and ultrasonic signals; Performing gain processing on the target audio signal and the ultrasonic signal respectively and then inputting the resultant signals into a mixer to obtain a first audio signal; performing limiting and filtering processing on the first audio signal in sequence to obtain a second audio signal; performing upmixing processing on the second audio signal to obtain a third audio signal; The third audio signal is played through a speaker in a target sound zone, where the target sound zone is determined from a plurality of candidate sound zones, and each of the candidate sound zones has a corresponding speaker.

2. The method according to claim 1, characterized in that The frequency of the ultrasonic signal is determined based on the characteristics of the speaker; Generating the ultrasonic signal includes: Generate the ultrasonic signal by a single tone generator; or The ultrasonic signal is generated by looping and playing the ultrasonic file.

3. The method according to claim 1, characterized in that The obtaining of the first audio signal includes: sampling the target audio signal and the ultrasonic signal based on a specific sampling frequency; The average value of the target audio signal and the ultrasonic signal at each sampling point is determined by a mixer to determine the first audio signal.

4. The method according to claim 1, wherein The step of sequentially performing limiting and filtering processing on the first audio signal to obtain a second audio signal includes: performing a limiting process on the first audio signal by a limiter; The first audio signal after the amplitude limiting processing is filtered by a filter to obtain a second audio signal.

5. The method according to claim 1, characterized in that Each of the speakers has a corresponding switch and / or mute device; The method further comprises: Use a switch to turn off the speakers in non-target sound zones; or The third audio signal played in the loudspeaker in the non-target sound zone is muted by the muting device.

6. An audio processing system, characterized in that: The system comprises: An input unit, used for acquiring target audio signals and ultrasonic signals; a modulation unit, comprising at least one gainer, a mixer, a limiter, and a filter, configured to perform gain processing on the target audio signal and the ultrasonic signal, respectively, and then input the gain processing to the mixer to obtain a first audio signal; and perform limiting and filtering processing on the first audio signal in sequence through the limiter and the filter to obtain a second audio signal; The output unit includes an upmixer and at least one speaker, and is configured to upmix the second audio signal through the upmixer to obtain a third audio signal, and play the third audio signal through a speaker in a target sound zone, where the target sound zone is determined from a plurality of candidate sound zones, each of the candidate sound zones having a corresponding speaker.

7. The system according to claim 6, characterized in that Each of the speakers has a corresponding switch and / or mute device.

8. The system according to claim 6, wherein: Each of the loudspeakers is directed toward an area where human ears are located within the corresponding candidate sound zone.

9. An audio processing device, characterized in that: The device comprises: A first acquisition module is configured to acquire a target audio signal and an ultrasonic signal; a second acquisition module configured to perform gain processing on the target audio signal and the ultrasonic signal respectively and then input the resultant signals into a mixer to acquire a first audio signal; a third acquisition module, configured to perform limiting and filtering processing in sequence on the first audio signal to acquire a second audio signal; a fourth acquisition module, configured to perform upmixing processing on the second audio signal to obtain a third audio signal; The playing module is configured to play the third audio signal through a speaker in a target sound zone, where the target sound zone is determined from a plurality of candidate sound zones, and each of the candidate sound zones has a corresponding speaker.

10. A vehicle, characterized in that: The vehicle comprises: Vehicle body; According to the audio processing system as described in any one of claims 6 to 8, each of the speakers has a corresponding candidate sound zone, and each of the speakers has a corresponding switch and / or mute device.

11. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

12. A computer program product, characterized in that When the computer program product is run on a computer, the computer is caused to perform the method according to any one of claims 1 to 5.

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