Acoustic system, method, device, computer readable storage medium and vehicle

Abstract

The invention relates to an acoustic system, method and device, a computer readable storage medium and a vehicle, the acoustic system comprises a controller and a noise control module, the controller is used for obtaining a sound signal and filtering a non-noise signal from the sound signal to obtain a noise signal; and the noise control module is used for generating and outputting a noise control signal based on the noise signal so as to carry out noise reduction on the noise signal. According to the technical scheme, the non-noise signal is filtered from the sound signal, the noise signal is obtained, noise reduction is carried out on the noise signal, noise reduction on non-noise such as navigation sound or music sound in a cabin is avoided, and the noise reduction efficiency is improved. Crosstalk to non-noise in the noise reduction process is reduced, and the user experience is improved.

Description

Technical Field

[0001] The present application relates to the field of electronic technology, and in particular to an acoustic system, method, device, computer-readable storage medium and vehicle. Background Art

[0002] With the rapid development of new energy vehicles, the sound quality of car cabins has received more and more attention. During the driving process of new energy vehicles, road noise or hybrid engine noise invades the cabin, seriously affecting the driving experience. In addition, driven by the background of the new four modernizations of automobiles, cars have gradually transformed from simple means of transportation to smart terminal devices.

[0003] Some electroacoustic technical solutions have been proposed, such as active noise control technology. Active noise control technology can actively reduce the noise level, but it is easy to reduce non-noise such as navigation sound or music sound in the cockpit at the same time, resulting in crosstalk to non-noise during the noise reduction process, resulting in a reduced user experience. Summary of the invention

[0004] The embodiments of the present application provide an acoustic system, which improves the safety of the acoustic system and at least partially solves the above-mentioned technical problems.

[0005] In order to achieve the above object, according to a first aspect of the present application, an acoustic system is provided, the acoustic system comprising: a controller and a noise control module, wherein:

[0006] The controller is used to obtain a sound signal, filter out a non-noise signal from the sound signal, and obtain a noise signal;

[0007] The noise control module is used to generate and output a noise control signal based on the noise signal to reduce noise on the noise signal.

[0008] Optionally, the acoustic system includes an error sensor, wherein:

[0009] The controller is used to filter the non-noise signal from the sound signal through the error sensor pair to obtain a noise signal.

[0010] Optionally, the acoustic system includes a sound pickup microphone, wherein:

[0011] The controller is used to filter out non-noise signals from the sound signal through the sound receiving microphone to obtain a reference sound signal;

[0012] The controller is used to locate the position of a human ear and determine a noise signal according to the position of the human ear and the reference sound signal;

[0013] Optionally, the noise control module includes a filter, wherein:

[0014] The noise control module is used to input the noise signal into the filter to generate the noise control signal.

[0015] Optionally, where:

[0016] The controller is used to determine a reference noise signal based on motion information corresponding to the vehicle, and to update a filter coefficient in the filter based on the reference noise signal and the noise signal.

[0017] Optionally, where:

[0018] The controller is configured to determine an error signal based on the reference noise signal and the noise signal;

[0019] The controller is used to update the filter coefficients in the filter based on the reference noise signal and the error signal.

[0020] Optionally, where:

[0021] The noise control module is used to control the speaker to output the anti-phase sound wave corresponding to the noise control signal to reduce the noise signal.

[0022] Optionally, the acoustic system further includes a sound field partitioning module, wherein:

[0023] The controller is used to obtain the partition audio signal corresponding to each partition position in response to the partition instruction;

[0024] The sound field partitioning module is used to play the corresponding partition audio signal through the speakers corresponding to each partition position.

[0025] Optionally, where:

[0026] The controller is used to input the audio signal into a preset partition filter set to obtain the partition audio signal corresponding to each partition position.

[0027] Optionally, the partition filter set includes partition filters corresponding to each partition position, wherein:

[0028] The controller is used to control the speakers corresponding to each partition position to play the corresponding excitation source audio based on a preset excitation source control signal, and obtain the partition filter parameters corresponding to each partition position according to the excitation source control signal and the excitation source audio.

[0029] Optionally, the acoustic system further comprises a directional sound source module, wherein:

[0030] The controller is used to perform compensation modulation processing on the navigation audio signal to obtain a modulated signal when recognizing that the partition audio signal is a navigation audio signal;

[0031] The directional sound source module is used to generate and play the navigation audio signal to the target partition position based on the modulated signal.

[0032] Optionally, where:

[0033] The controller is used to perform distortion compensation on the navigation audio signal based on preset distortion information, and to perform frequency band modulation on the navigation audio signal after distortion compensation based on a preset frequency band to obtain a modulated signal.

[0034] Optionally, the directional sound source module includes an ultrasonic transducer, wherein:

[0035] The directional sound source module is used to control the ultrasonic transducer to output the modulated signal based on the target partition position, so as to play the navigation audio signal to the target partition position.

[0036] Optionally, the acoustic system further includes a privacy voice module, wherein:

[0037] The privacy voice module is used to obtain a voice signal in the privacy area in response to the privacy voice instruction;

[0038] The controller is used to generate a shielding signal based on a voice signal, and control a speaker in a non-privacy area to output the shielding signal, so as to shield the voice signal of the privacy area in the non-privacy area.

[0039] According to a second aspect of the present application, an embodiment of the present application further provides a control method, the control method is applied to a controller in an acoustic system, the acoustic system further includes a noise control module, the method includes:

[0040] Acquire a sound signal, and filter a non-noise signal from the sound signal to obtain a noise signal;

[0041] The noise signal is sent to the noise control module, so that the noise control module generates and outputs a noise control signal based on the noise signal to reduce noise on the noise signal.

[0042] Optionally, the acoustic system includes an error sensor, and filtering the non-noise signal from the sound signal to obtain the noise signal includes:

[0043] The non-noise signal is filtered out from the sound signal by the error sensor pair to obtain a noise signal.

[0044] Optionally, the acoustic system includes a sound receiving microphone, and the filtering of the non-noise signal from the sound signal to obtain the noise signal includes:

[0045] Filtering non-noise signals from the sound signal by the sound receiving microphone to obtain a reference sound signal;

[0046] The position of a human ear is located, and a noise signal is determined according to the position of the human ear and the reference sound signal.

[0047] Optionally, the noise control module includes a filter, and the method further includes:

[0048] Get the motion information corresponding to the vehicle;

[0049] Based on the motion information, determining a reference noise signal;

[0050] Based on the reference noise signal and the noise signal, the filter coefficient in the filter is updated so that the noise control module inputs the reference noise signal into the filter to generate the noise control signal.

[0051] Optionally, updating a filter coefficient in the filter based on the reference noise signal and the noise signal includes:

[0052] determining an error signal based on the reference noise signal and the noise signal;

[0053] The filter coefficients in the filter are updated based on the reference noise signal and the error signal.

[0054] Optionally, the acoustic system further includes a sound field partitioning module, and the method further includes:

[0055] In response to the partition instruction, the audio signal is input into a preset partition filter set to obtain a partition audio signal corresponding to each partition position;

[0056] The partition audio signal is sent to the sound field partition module, so that the sound field partition module plays the corresponding partition audio signal through the speakers corresponding to the respective partition positions.

[0057] Optionally, in response to the partition instruction, inputting the audio signal into a preset partition filter set to obtain the partition audio signal corresponding to each partition position includes:

[0058] Based on the preset excitation source control signal, the speakers corresponding to each partition position are controlled to play the corresponding excitation source audio;

[0059] According to the excitation source control signal and the excitation source audio, the partition filter parameters corresponding to each partition position are obtained, and a preset partition filter set is obtained.

[0060] Optionally, the acoustic system further includes a directional sound source module, and the method further includes:

[0061] When the partition audio signal is identified as a navigation audio signal, compensation modulation processing is performed on the navigation audio signal to obtain a modulated signal;

[0062] The modulated signal is sent to the directional sound source module, so that the directional sound source module generates and plays the navigation audio signal to the target partition position based on the modulated signal.

[0063] Optionally, performing compensation modulation processing on the navigation audio signal to obtain a modulated signal includes:

[0064] Based on the preset distortion information, the navigation audio signal is subjected to distortion compensation, and the navigation audio signal after the distortion compensation is subjected to frequency band modulation based on a preset frequency band to obtain a modulated signal.

[0065] Optionally, the acoustic system further includes a privacy voice module, and the method further includes:

[0066] receiving a voice signal of a privacy area acquired by the privacy voice module in response to a privacy voice instruction;

[0067] Based on the speech signal, a masking signal is generated;

[0068] The speaker in the non-privacy area is controlled to output the shielding signal to shield the voice signal of the privacy area in the non-privacy area.

[0069] According to the third aspect of the present application, an embodiment of the present application also provides an acoustic device, which includes: one or more processors and memories; and one or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the processor in any one of the steps of the control method provided in the embodiment of the present application.

[0070] According to the fourth aspect of the present application, an embodiment of the present application also provides a computer-readable storage medium, which stores multiple computer programs. The computer programs are suitable for loading by a processor to execute the steps of any control method provided in the embodiment of the present application.

[0071] According to the fifth aspect of the present application, an embodiment of the present application also provides a computer program product, including a computer program or a computer program, which implements the steps of any distribution harness protection method provided in the embodiment of the present application when the computer program or the computer program is executed by a processor.

[0072] According to the sixth aspect of the present application, an embodiment of the present application also provides a vehicle, the vehicle comprising the acoustic system provided by the embodiment of the present application, and the acoustic device provided by the embodiment of the present application.

[0073] The acoustic system of the embodiment of the present application includes: a controller and a noise control module, wherein: the controller is used to obtain a sound signal, filter out non-noise signals from the sound signal, and obtain a noise signal; the noise control module is used to generate and output a noise control signal based on the noise signal to reduce the noise signal. Through the above technical solution, the non-noise signal is filtered out from the sound signal to obtain the noise signal, and the noise signal is reduced to avoid reducing the noise of non-noise such as navigation sound or music sound in the cockpit at the same time, reduce the crosstalk caused to the non-noise during the noise reduction process, and improve the user experience.

[0074] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0076] Figure 1 A schematic diagram of the structure of an acoustic system provided in an embodiment of the present application;

[0077] Figure 2 A schematic diagram of the headrest structure of a vehicle provided in an embodiment of the present application;

[0078] Figure 3 A schematic diagram of the structure of an acoustic system provided in an embodiment of the present application;

[0079] Figure 4 A schematic diagram of the structure of an acoustic system provided in an embodiment of the present application;

[0080] Figure 5 A schematic diagram of a structure of a directional sound source provided in an embodiment of the present application;

[0081] Figure 6 A schematic diagram of the structure of an acoustic system provided in an embodiment of the present application;

[0082] Figure 7 A schematic diagram of the structure of an acoustic system provided in an embodiment of the present application;

[0083] Figure 8A schematic diagram of a first embodiment of a control method provided in an embodiment of the present application;

[0084] Fig. 9 A schematic flow chart of a second embodiment of the control method provided in the embodiment of the present application;

[0085] Fig.10 A schematic diagram of a third embodiment of the control method provided in the embodiment of the present application;

[0086] Fig.11 A schematic flow chart of a fourth embodiment of the control method provided in the embodiment of the present application;

[0087] Fig.12 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application. DETAILED DESCRIPTION

[0088] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0089] This application provides an acoustic system, see Figure 1 , Figure 1 A schematic diagram of the structure of an acoustic system provided in an embodiment of the present application.

[0090] The acoustic system includes: a controller and a noise control module, wherein:

[0091] A controller, used for acquiring a sound signal, filtering a non-noise signal from the sound signal, and obtaining a noise signal;

[0092] The noise control module is used to generate and output a noise control signal based on the noise signal to reduce the noise signal.

[0093] In this embodiment, the controller and the noise control module are connected in communication, and CAN communication or the like can be used for connection. The controller can obtain the sound signal near the ears of passengers through the microphone and other devices in the vehicle, and filter the non-noise signal from the sound signal to obtain the noise signal; wherein the non-noise signal includes the navigation sound or music sound emitted by other devices in the vehicle, and the sound of the passengers talking in the vehicle; the controller sends the noise signal to the noise control module, and the noise control module generates a noise control signal based on the noise signal, and the speaker in the noise control module vehicle emits a reverse phase sound wave based on the noise control signal to reduce the noise signal.

[0094] The acoustic system of this embodiment filters out non-noise signals from sound signals to obtain noise signals, and performs noise reduction on the noise signals, thereby avoiding simultaneously reducing the noise of non-noises such as navigation sounds or music sounds in the cockpit, reducing crosstalk to non-noises during the noise reduction process, and improving user experience.

[0095] In one embodiment, the acoustic system includes an error sensor, and the noise control module includes a filter, wherein:

[0096] A controller, configured to filter a non-noise signal from a sound signal through an error sensor pair to obtain a noise signal;

[0097] A controller, configured to determine a reference noise signal based on motion information corresponding to the vehicle, and to update a filter coefficient in a filter based on the reference noise signal and the noise signal;

[0098] The noise control module is used for inputting a reference noise signal into a filter to generate a noise control signal.

[0099] Specifically, when the controller obtains the sound signal, it filters the non-noise signal from the sound signal through the error sensor to obtain the noise signal; the controller obtains the motion information corresponding to the vehicle, and determines the reference noise signal based on the motion information corresponding to the vehicle. The motion information includes the engine speed and the acceleration of the wheel. The reference noise signal determined by the controller according to the engine speed is the engine noise signal, and the reference noise signal determined according to the acceleration of the wheel is the road noise signal. The controller updates the filter coefficient in the filter based on the reference noise signal and the noise signal; the controller sends the engine noise signal and the road noise signal to the noise control module, and the noise control module inputs the reference noise signal into the filter to generate the noise control signal.

[0100] Furthermore, the controller is used to determine an error signal based on a reference noise signal and a noise signal; the controller is used to update a filter coefficient in a filter based on the reference noise signal and the error signal.

[0101] Specifically, the controller determines an error signal corresponding to the engine noise signal based on the engine noise signal and the noise signal, and determines an error signal corresponding to the road noise signal based on the road noise signal and the noise signal; the controller updates a filter coefficient in a filter for processing the engine noise signal based on the engine noise signal and the error signal corresponding to the engine noise signal, and updates a filter coefficient in a filter for processing the road noise signal based on the road noise signal and the error signal corresponding to the road noise signal.

[0102] It can be understood that the noise control module is divided into two parts: engine active noise reduction (ENC) and road noise active noise reduction (RNC). In ENC, the controller extracts the engine speed through the CAN line and obtains the order noise of the current engine as the reference noise signal (engine noise signal). In RNC, the reference noise signal (road noise signal) is obtained through the acceleration sensor. The controller determines the error signal corresponding to the engine noise signal based on the engine noise signal and the noise signal, and determines the error signal corresponding to the road noise signal based on the road noise signal and the noise signal; the controller updates the filter coefficient in the filter that processes the engine noise signal based on the engine noise signal and the error signal corresponding to the engine noise signal, and updates the filter coefficient in the filter that processes the road noise signal based on the road noise signal and the error signal corresponding to the road noise signal. The noise control module passes the engine noise signal through the filter that processes the engine noise signal after the updated coefficient, and obtains the noise control signal corresponding to the engine noise signal. The noise control module passes the road noise signal through the filter that processes the road noise signal after the updated coefficient, and obtains the noise control signal corresponding to the road noise signal. Finally, the noise control module broadcasts the anti-phase sound waves through the secondary speakers (surround speakers and headrest speakers) based on the noise control signals corresponding to the engine noise signal and the noise control signals corresponding to the road noise signal, thereby achieving the effect of noise control.

[0103] Furthermore, when the reference noise signal only includes the engine noise signal or the road noise signal, the noise control module broadcasts the anti-phase sound wave from the secondary speaker (surround speaker and headrest speaker) based on the noise control signal corresponding to the engine noise signal or the noise control signal corresponding to the road noise signal, so as to achieve the effect of noise control. When the reference noise signal includes the engine noise signal and the road noise signal, the noise control module superimposes the noise control signal corresponding to the engine noise signal and the noise control signal corresponding to the road noise signal to obtain the superimposed noise control signal, and the secondary speaker (surround speaker and headrest speaker) broadcasts the anti-phase sound wave, so as to achieve the effect of controlling the engine noise and the road noise.

[0104] The acoustic system of this embodiment obtains a reference noise signal, updates the filter coefficient in the filter based on the reference noise signal and the noise signal, and then inputs the reference noise signal into the filter to generate a noise control signal. Based on the noise control signal, the secondary speaker broadcasts an inverted sound wave to achieve the effect of noise control. This can avoid simultaneously reducing the noise of non-noise such as navigation sound or music sound in the cabin, reduce the crosstalk caused to non-noise during the noise reduction process, and improve the user experience.

[0105] In one embodiment, the acoustic system includes a sound pickup microphone, and the noise control module includes a filter, wherein:

[0106] A controller, used for filtering non-noise signals from sound signals through a sound receiving microphone to obtain a reference sound signal;

[0107] A controller, used for locating a human ear position and determining a noise signal according to the human ear position and a reference sound signal;

[0108] Specifically, the controller locates the human ear in real time and calculates the acoustic transfer function between the sound receiving microphone and the virtual microphone. The controller filters out the non-noise signal from the sound signal collected by the sound receiving microphone to obtain a reference sound signal, and performs acoustic transfer function compensation on the reference sound signal to obtain a virtual microphone signal as the noise signal.

[0109] The controller is used to determine a reference noise signal based on the motion information corresponding to the vehicle, and update the filter coefficient in the filter based on the reference noise signal and the noise signal;

[0110] The noise control module is used to input the noise signal into the filter to generate the noise control signal.

[0111] Specifically, the controller obtains the motion information corresponding to the vehicle, and determines the reference noise signal based on the motion information corresponding to the vehicle. The motion information includes the engine speed and the acceleration of the wheels. The reference noise signal determined by the controller according to the engine speed is the engine noise signal, and the reference noise signal determined according to the acceleration of the wheels is the road noise signal. The controller updates the filter coefficients in the filter based on the reference noise signal and the noise signal; the controller sends the engine noise signal and the road noise signal to the noise control module, and the noise control module inputs the noise signal into the filter to generate a noise control signal. Based on the noise control signal corresponding to the engine noise signal and the noise control signal corresponding to the road noise signal, the noise control module broadcasts the anti-phase sound wave through the secondary speakers (surround speakers and headrest speakers) to achieve the effect of noise control.

[0112] For example, reference Figure 2 , Figure 2 The figure is a schematic diagram of the vehicle headrest structure; the sound receiving microphone is the headrest microphone. The position of the headrest microphone may be different according to the error sensor of the acoustic system or the need of the virtual microphone technology. When the virtual microphone technology is not used, the error microphone must be installed near the human ear. When the virtual microphone technology is used, the headrest microphone is installed in a position where the signal correlation with the human ear is strong and is not easily interfered by the speaker. As a speaker for active noise control and car sound field partitioning, the headrest speaker can improve the noise control effect and the contrast of the sound field partition while ensuring the sound quality effect.

[0113] The acoustic system of this embodiment filters out non-noise signals from sound signals through a microphone to obtain a reference sound signal; locates the position of the human ear, and determines the noise signal based on the position of the human ear and the reference sound signal; determines the reference noise signal based on the motion information corresponding to the vehicle, and updates the filter coefficient in the filter based on the reference noise signal and the noise signal. The accuracy of the determined noise signal can be improved, and the accuracy of updating the filter coefficient in the filter can be improved. The reference noise signal is then input into the filter to generate a noise control signal, which can improve the accuracy of generating the noise control signal and help improve the effect of noise control.

[0114] Please refer to Figure 3 , Figure 3 A schematic diagram of the structure of an acoustic system provided in an embodiment of the present application.

[0115] The acoustic system includes: a controller and a sound field partition module, wherein:

[0116] A controller, configured to obtain a partition audio signal corresponding to each partition position in response to a partition instruction;

[0117] The sound field partition module is used to play the corresponding partition audio signal through the speakers corresponding to each partition position.

[0118] Specifically, the controller is used to input the audio signal into a preset partition filter set to obtain a partition audio signal corresponding to each partition position.

[0119] It can be understood that the controller responds to the partition instruction to obtain the partition audio signal corresponding to each partition position, and the partition positions may include: main driver's seat, co-driver's seat, rear passenger seat, etc.; the controller inputs the audio signal on the audio bus into each partition filter of the preset partition filter set to obtain the partition audio signal corresponding to each partition position, and the sound field partition module plays the corresponding partition audio signal through the speakers corresponding to each partition position.

[0120] Exemplarily, the controller determines that the partition position is the co-pilot seat, and inputs the audio signal on the audio bus into each partition filter of a preset partition filter set. The partition filter set includes the partition filter corresponding to the co-pilot seat. The partition filter corresponding to the co-pilot seat filters out the partition audio signal corresponding to the co-pilot seat in the audio signal. The sound field partition module plays the partition audio signal corresponding to the co-pilot seat through the speaker corresponding to the co-pilot seat. The corresponding partition filters of other partition positions in the partition filter set filter out the partition audio signal corresponding to the co-pilot seat in the audio signal. Then, the speakers corresponding to other partition positions will not play the partition audio signal corresponding to the co-pilot seat.

[0121] Furthermore, the controller is used to control the speakers corresponding to each partition position to play the corresponding excitation source audio based on a preset excitation source control signal, and obtain the partition filter parameters corresponding to each partition position according to the excitation source control signal and the excitation source audio.

[0122] Specifically, before achieving the effect of audio partitioning, a sufficient number of microphones are arranged at each partition position; for each partition position, the controller controls the speaker at the partition position to play an excitation source control signal (white noise), uses the microphone to pick up the played excitation source audio, calculates the electroacoustic transfer function according to the excitation source control signal and the excitation source audio, substitutes the measured electroacoustic transfer function into the sound partitioning algorithm, and calculates the partition filter parameters corresponding to the partition position.

[0123] In the acoustic system of this embodiment, the controller responds to the partition instruction to obtain the partition audio signal corresponding to each partition position; the sound field partition module is used to play the corresponding partition audio signal through the speakers corresponding to each partition position to achieve the effect of audio partition.

[0124] Please refer to Figure 4 , Figure 4 A schematic diagram of the structure of an acoustic system provided in an embodiment of the present application.

[0125] The acoustic system includes: a controller, a sound field partition module and a directional sound source module.

[0126] The controller is used to perform compensation modulation processing on the navigation audio signal to obtain a modulated signal when recognizing that the partition audio signal is a navigation audio signal;

[0127] The directional sound source module is used to generate and play a navigation audio signal to a target partition position based on the modulated signal.

[0128] Specifically, the controller responds to the partition instruction, obtains the partition audio signal corresponding to each partition position, and if it is determined that the partition audio signal corresponding to a partition position is a navigation audio signal, the navigation audio signal is compensated and modulated to obtain a modulated signal. The directional sound source module generates and plays the navigation audio signal to the target partition position based on the modulated signal.

[0129] Specifically, the controller is used to perform distortion compensation on the navigation audio signal based on preset distortion information, and perform frequency band modulation on the navigation audio signal after distortion compensation based on a preset frequency band to obtain a modulated signal.

[0130] Among them, before the directional sound source actually works, the controller calculates the distortion of the high-directional signal through simulation and experimental means to obtain preset distortion information. The controller uses the distortion compensation algorithm and the preset distortion information to perform distortion compensation on the navigation audio signal, and performs frequency band modulation on the navigation audio signal after distortion compensation based on the preset frequency band to obtain a modulated signal, which can improve the fidelity and clarity of the navigation audio signal output by the directional sound source module.

[0131] Exemplarily, when the controller determines that the partition position is the main driving position and the partition audio signal corresponding to the main driving position is the navigation audio signal, the navigation audio signal is distortion compensated based on the preset distortion information, and the navigation audio signal after distortion compensation is frequency modulated based on the preset frequency band to obtain a modulated signal. The directional sound source module in the main driving position generates and plays the navigation audio signal to the main driving position based on the modulated signal. Then, the directional sound source modules corresponding to other partition positions will not play the navigation audio signal corresponding to the main driving position.

[0132] Furthermore, the directional sound source module is used to control the ultrasonic transducer to output the modulated signal based on the target partition position, so as to play the navigation audio signal to the target partition position.

[0133] The directional sound source module includes an ultrasonic transducer, which controls the ultrasonic transducer to output a modulated signal based on the target partition position to play the navigation audio signal to the target partition position. Figure 5 , Figure 5 A structural schematic diagram of a directional sound source provided in an embodiment of the present application; a disc-shaped directional sound source comprises a base, an ultrasonic transducer unit and a shell. Preferably, thanks to the penetrability of ultrasonic waves, the directional sound source can be installed in the vehicle interior, display screen, and steering wheel without the use of an additional shell. Among them, the directional sound source for the main driving position is installed in a position such as the steering wheel and the instrument panel that does not block the driving line of sight. The ultrasonic transducer is connected by a circuit board in the base and receives a signal sent by an integrated controller. Directional sound sources are installed in front of four seats in the car, and each directional sound source includes a group of ultrasonic transducer arrays, which can accurately control the propagation direction of the sound and transmit the signal distributed by the integrated controller to each seat in a directionally directed manner.

[0134] In the acoustic system of this embodiment, when the controller recognizes that the partition audio signal is a navigation audio signal, it performs distortion compensation on the navigation audio signal based on preset distortion information, and performs frequency band modulation on the navigation audio signal after distortion compensation based on a preset frequency band to obtain a modulated signal; the directional sound source module generates and plays the navigation audio signal to the target partition position based on the modulated signal. This can enhance the clarity and directionality of the navigation audio signal, improve driving safety, and at the same time improve the fidelity and clarity of the navigation audio signal output by the directional sound source module.

[0135] Please refer to Figure 6 , Figure 6 A schematic diagram of the structure of an acoustic system provided in an embodiment of the present application.

[0136] The acoustic system includes: a controller and a privacy voice module, wherein:

[0137] A privacy voice module, used to obtain a voice signal in a privacy area in response to a privacy voice command;

[0138] The controller is used to generate a shielding signal based on the voice signal, and control the speaker in the non-privacy area to output the shielding signal to shield the voice signal in the privacy area in the non-privacy area.

[0139] Specifically, the privacy voice module responds to the privacy voice command and obtains the voice signal of the privacy area; the controller generates a shielding signal based on the voice signal, and controls the speaker of the non-privacy area to output the shielding signal to shield the voice signal of the privacy area in the non-privacy area. Exemplarily, a privacy function switch is installed at the armrest position of the rear passenger seat of the vehicle, which is directly connected to the controller and supports one-button start of regional shielding; the privacy voice module responds to the privacy voice command of the rear passenger seat and obtains the voice signal of the rear passenger seat; the controller generates a shielding signal based on the voice signal, and controls the speakers of the main driver seat and the co-driver seat to output the shielding signal to shield the voice signal of the rear passenger seat in the main driver seat and the co-driver seat.

[0140] Furthermore, after determining the voice signal in the privacy area, the controller obtains the sound signal near the passenger's ear through a microphone or other equipment in the non-privacy area of ​​the vehicle, and filters the non-noise signal from the sound signal to obtain a noise signal, wherein the noise signal includes the voice signal in the privacy area; the noise control module generates and outputs a noise control signal based on the noise signal, and controls the speaker in the non-privacy area to play an inverted sound wave based on the noise control signal to reduce the noise of the voice signal in the privacy area, so that the voice signal in the privacy area is shielded from the non-privacy area.

[0141] In the acoustic system of this embodiment, the privacy voice module responds to the privacy voice command and obtains the voice signal of the privacy area; the controller generates a shielding signal based on the voice signal and controls the speaker of the non-privacy area to output the shielding signal to shield the voice signal of the privacy area in the non-privacy area. The privacy of voice communication in a specific area in the cabin can be achieved, and the user's sense of security and satisfaction can be improved.

[0142] For specific implementation, please refer to Figure 7 , Figure 7 A schematic diagram of the structure of an acoustic system provided in an embodiment of the present application.

[0143] The acoustic system includes: a controller, a noise control module, a sound field partition module, a directional sound source module, a privacy voice module and a speaker microphone array.

[0144] As the core of the system, the integrated controller is responsible for coordinating the work of various modules and realizing the integrated management of complex acoustic functions. The system's active noise control module, car sound field partition module, directional sound source module, speaker-microphone array and regional shielding system realize functions such as cabin noise elimination, independent private audio, independent navigation sound, and private voice communication.

[0145] The noise control module is divided into engine active noise control and road noise active control. It obtains engine reference signals and road noise reference signals through engine speed and acceleration sensors respectively, obtains error signals through error sensors or virtual microphone technology in the vehicle cabin, iteratively updates the adaptive filter coefficients in the integrated controller, and generates anti-phase sound waves to control noise.

[0146] The sound field partition module pre-sets a certain number of control points in the car, then measures the electroacoustic transfer function from each speaker to each control point, trains the control filter of each speaker through the sound field partition algorithm, and stores it in the storage unit of the integrated controller. According to the partition position and partition sound source selected by the user, the sound source is filtered in the integrated controller to obtain the output signal of each speaker.

[0147] The directional sound source module modulates the input signal into an ultrasonic signal in the integrated controller and uses a highly directional ultrasonic transducer array to output the ultrasonic signal, which can achieve directional sound transmission in a specific area such as independent navigation sound. The distortion compensation algorithm is added to reduce the output signal distortion and improve the sound quality.

[0148] The speaker-microphone array includes headrest speakers on each seat, surround speakers in the car, headrest microphones and pickup microphones in other locations. The headrest speakers and surround speakers can work together according to the needs of the active noise control module or the sound field partition module, and the microphone can autonomously filter out the signal from the speaker during the sound pickup process, improve the sound pickup quality, and avoid crosstalk between different systems. The installation position of the speaker is also optimized for the sound field partition technology to improve the partition effect.

[0149] The privacy voice module provides users with a private voice communication environment through sound wave interference effect and sound masking effect. A privacy function switch is installed in the back row of the vehicle to achieve one-click isolation of the back row.

[0150] The controller is installed in the vehicle center console and includes a digital signal processor (DSP), a micro control unit (MCU), an on-board audio bus interface (A2B), an on-board CAN bus interface, a storage unit, and a power amplifier. Through a highly integrated design, the wiring of the vehicle center console is simplified, the occupied space is reduced, and the reliability and stability of the system are improved. When two or more modules are started, the microphone signal received by a module will filter out the signal output by the speaker of another module in the controller, reducing the crosstalk between modules. At the same time, through the collaborative work of DSP and MCU, high-quality audio processing and control are achieved, which improves the user's driving experience. Select a suitable position near the four wheels of the vehicle and install an acceleration sensor respectively. Each acceleration sensor can collect three-axis acceleration signals. These sensors need to be waterproof and dustproof, and can work stably during the vehicle's driving. Through A2B bus technology, high-speed and low-latency data transmission between sensors and integrated controllers is achieved.

[0151] After the vehicle is started, the system is initialized and is in standby mode.

[0152] When the engine is started, the system starts the active noise control of the engine. The controller reads the engine speed from the CAN line, turns on the error microphone (optional: virtual microphone), surround speakers, and headrest speakers. The system sends out an anti-phase sound wave according to the current speed to offset the engine noise.

[0153] When the vehicle is moving, the system starts active noise control for road noise. The acceleration sensor, error microphone (optional: virtual microphone), surround speakers, and headrest speakers are turned on. The system sends out an anti-phase noise cancellation signal based on the current chassis vibration.

[0154] When the user chooses to play audio: determine whether the user has selected the partition function. If no partition is selected, play the surround sound of the entire car. If the user has selected the partition function, determine whether the user needs to play music or navigation. If navigation is selected, start the independent navigation sound module. Turn on the directional sound source at the corresponding position and play the navigation sound to the specified position. If the user selects the music partition, the car sound field partition module is started. The user specifies the location of the partition and the sound source to be played. Turn on the surround speakers, headrest speakers, and directional sound sources (optional). Play independent private audio in each partition position, and the partitions do not interfere with each other.

[0155] When the user selects private voice, the regional shielding system starts. The surround speakers, headrest speakers, and pickup microphones are turned on. The sound waves in a specific area are shielded to provide a private voice communication environment.

[0156] refer to Figure 8 , Figure 8 A schematic flow chart of a first embodiment of a control method provided in an embodiment of the present application. The control method is applied to a controller in an acoustic system of a vehicle, the acoustic system further comprising a noise control module, and the method comprises:

[0157] Step 101, obtaining a sound signal, filtering a non-noise signal from the sound signal, and obtaining a noise signal;

[0158] Step 102: Send the noise signal to the noise control module, so that the noise control module generates and outputs a noise control signal based on the noise signal to reduce noise on the noise signal.

[0159] In this embodiment, the controller and the noise control module are connected in communication, and CAN communication or the like can be used for connection. The controller can obtain the sound signal near the ears of passengers through the microphone and other devices in the vehicle, and filter the non-noise signal from the sound signal to obtain the noise signal; wherein the non-noise signal includes the navigation sound or music sound emitted by other devices in the vehicle, and the sound of the passengers talking in the vehicle; the controller sends the noise signal to the noise control module, and the noise control module generates a noise control signal based on the noise signal, and the speaker in the noise control module vehicle emits a reverse phase sound wave based on the noise control signal to reduce the noise signal.

[0160] The controller of this embodiment filters out non-noise signals from sound signals to obtain noise signals, and performs noise reduction on the noise signals, thereby avoiding simultaneously reducing the noise of non-noises such as navigation sounds or music sounds in the cockpit, reducing crosstalk to non-noises during the noise reduction process, and improving user experience.

[0161] Specifically, the vehicle includes an error sensor, and filtering the non-noise signal from the sound signal to obtain the noise signal includes:

[0162] Step 1011: Filter the non-noise signal from the sound signal by using the error sensor pair to obtain a noise signal.

[0163] Specifically, the vehicle includes a microphone for receiving sound, and filtering the non-noise signal from the sound signal to obtain the noise signal includes:

[0164] Step 1012, filtering non-noise signals from the sound signal by the sound receiving microphone to obtain a reference sound signal;

[0165] Step 1013: locate the position of the human ear, and determine the noise signal according to the position of the human ear and the reference sound signal.

[0166] In this embodiment, optionally, the vehicle includes an error sensor, and when the controller obtains the sound signal, the error sensor is used to filter out the non-noise signal from the sound signal to obtain the noise signal, which can improve the efficiency of determining the noise signal. Optionally, the vehicle includes a radio microphone, and the controller calculates the acoustic transfer function between the radio microphone and the virtual microphone by locating the human ear in real time. The controller filters out the non-noise signal from the sound signal collected by the radio microphone to obtain a reference sound signal, and performs acoustic transfer function compensation on the reference sound signal to obtain a virtual microphone signal as the noise signal, which can improve the accuracy of determining the noise signal.

[0167] Specifically, the noise control module includes a filter, and step 102 includes:

[0168] Step 1021, obtaining motion information corresponding to the vehicle;

[0169] Step 1022, determining a reference noise signal based on the motion information;

[0170] Step 1023: based on the reference noise signal and the noise signal, update the filter coefficient in the filter so that the noise control module inputs the reference noise signal into the filter to generate the noise control signal.

[0171] Specifically, step 1023 includes:

[0172] Step 10231, determining an error signal based on the reference noise signal and the noise signal;

[0173] Step 10232: Update the filter coefficients in the filter based on the reference noise signal and the error signal.

[0174] In this embodiment, the controller obtains the motion information corresponding to the vehicle, and determines the reference noise signal based on the motion information corresponding to the vehicle. The motion information includes the engine speed and the acceleration of the wheels. The reference noise signal determined by the controller according to the engine speed is the engine noise signal, and the reference noise signal determined according to the acceleration of the wheels is the road noise signal. The controller updates the filter coefficient in the filter based on the reference noise signal and the noise signal; the controller sends the engine noise signal and the road noise signal to the noise control module, and the noise control module inputs the noise signal into the filter to generate a noise control signal. Based on the noise control signal corresponding to the engine noise signal and the noise control signal corresponding to the road noise signal, the noise control module broadcasts the anti-phase sound wave through the secondary speakers (surround speakers and headrest speakers) to achieve the effect of noise control.

[0175] It can be understood that the noise control module is divided into two parts: engine active noise reduction (ENC) and road noise active noise reduction (RNC). In ENC, the controller extracts the engine speed through the CAN line and obtains the order noise of the current engine as a reference noise signal (engine noise signal). In RNC, the controller obtains the reference noise signal (road noise signal) through the acceleration sensor. The controller determines the error signal corresponding to the engine noise signal based on the engine noise signal and the noise signal, and determines the error signal corresponding to the road noise signal based on the road noise signal and the noise signal; the controller updates the filter coefficient in the filter that processes the engine noise signal based on the engine noise signal and the error signal corresponding to the engine noise signal, and updates the filter coefficient in the filter that processes the road noise signal based on the road noise signal and the error signal corresponding to the road noise signal. The noise control module passes the engine noise signal through the filter that processes the engine noise signal after the updated coefficient to obtain the noise control signal corresponding to the engine noise signal. The noise control module passes the road noise signal through the filter that processes the road noise signal after the updated coefficient to obtain the noise control signal corresponding to the road noise signal. Finally, the noise control module broadcasts the anti-phase sound waves through the secondary speakers (surround speakers and headrest speakers) based on the noise control signals corresponding to the engine noise signal and the noise control signals corresponding to the road noise signal, thereby achieving the effect of noise control.

[0176] Furthermore, when the reference noise signal only includes the engine noise signal or the road noise signal, the noise control module broadcasts the anti-phase sound wave from the secondary speaker (surround speaker and headrest speaker) based on the noise control signal corresponding to the engine noise signal or the noise control signal corresponding to the road noise signal, so as to achieve the effect of noise control. When the reference noise signal includes the engine noise signal and the road noise signal, the noise control module superimposes the noise control signal corresponding to the engine noise signal and the noise control signal corresponding to the road noise signal to obtain the superimposed noise control signal, and the secondary speaker (surround speaker and headrest speaker) broadcasts the anti-phase sound wave, so as to achieve the effect of controlling the engine noise and the road noise.

[0177] The controller of this embodiment obtains a reference noise signal, updates the filter coefficient in the filter based on the reference noise signal and the noise signal, and then inputs the reference noise signal into the filter to generate a noise control signal. Based on the noise control signal, the secondary speaker broadcasts an inverted sound wave to achieve the effect of noise control. This can avoid simultaneously reducing the noise of non-noise such as navigation sound or music sound in the cabin, reduce the crosstalk caused to non-noise during the noise reduction process, and improve the user experience.

[0178] Please refer to Fig. 9 , Fig. 9 A schematic flow chart of a second embodiment of the control method provided in the embodiment of the present application. The acoustic system further includes a sound field partitioning module, and the method further includes:

[0179] Step 201, in response to a partition instruction, inputting an audio signal into a preset partition filter set to obtain a partition audio signal corresponding to each partition position;

[0180] Step 202: Send the partition audio signal to the sound field partition module, so that the sound field partition module plays the corresponding partition audio signal through the speakers corresponding to the respective partition positions.

[0181] In this embodiment, the controller responds to the partition instruction to obtain the partition audio signal corresponding to each partition position, and the partition positions may include: the main driver's seat, the co-driver's seat, the rear passenger seat, etc.; the controller inputs the audio signal on the audio bus into each partition filter of the preset partition filter set to obtain the partition audio signal corresponding to each partition position, and the sound field partition module plays the corresponding partition audio signal through the speakers corresponding to each partition position.

[0182] Exemplarily, the controller determines that the partition position is the co-pilot seat, and inputs the audio signal on the audio bus into each partition filter of a preset partition filter set. The partition filter set includes the partition filter corresponding to the co-pilot seat. The partition filter corresponding to the co-pilot seat filters out the partition audio signal corresponding to the co-pilot seat in the audio signal. The sound field partition module plays the partition audio signal corresponding to the co-pilot seat through the speaker corresponding to the co-pilot seat. The corresponding partition filters of other partition positions in the partition filter set filter out the partition audio signal corresponding to the co-pilot seat in the audio signal. Then, the speakers corresponding to other partition positions will not play the partition audio signal corresponding to the co-pilot seat.

[0183] The controller of this embodiment, in response to the partition instruction, obtains the partition audio signal corresponding to each partition position; the sound field partition module is used to play the corresponding partition audio signal through the speakers corresponding to each partition position, so as to achieve the effect of audio partition.

[0184] Specifically, in response to the partition instruction, inputting the audio signal into a preset partition filter set to obtain the partition audio signal corresponding to each partition position includes:

[0185] Step a, based on a preset excitation source control signal, controls the speakers corresponding to each partition position to play the excitation source audio;

[0186] Step b: obtaining the partition filter parameters corresponding to each partition position according to the excitation source control signal and the excitation source audio, and obtaining a preset partition filter set.

[0187] In this embodiment, before achieving the effect of audio partitioning, a sufficient number of microphones are arranged at each partition position; for each partition position, the controller controls the speaker at the partition position to play an excitation source control signal (white noise), uses the microphone to pick up the played excitation source audio, calculates the electroacoustic transfer function according to the excitation source control signal and the excitation source audio, substitutes the measured electroacoustic transfer function into the sound partitioning algorithm, calculates the partition filter parameters corresponding to the partition position, obtains the preset partition filter corresponding to each partition position according to the partition filter parameters corresponding to each partition position, and then obtains the preset partition filter set.

[0188] The controller of this embodiment pre-trains the partition filters corresponding to each partition position before achieving the audio partition effect, which can improve the accuracy of the subsequent audio partition effect.

[0189] Please refer to Fig.10 , Fig.10 A schematic flow chart of a third embodiment of the control method provided in the present application. The acoustic system further includes a directional sound source module, and the method further includes:

[0190] Step 301, when the subarea audio signal is identified as a navigation audio signal, compensation modulation processing is performed on the navigation audio signal to obtain a modulated signal;

[0191] Step 302: Send the modulated signal to the directional sound source module, so that the directional sound source module generates and plays the navigation audio signal to the target partition position based on the modulated signal.

[0192] In this embodiment, the controller responds to the partition instruction and obtains the partition audio signals corresponding to each partition position. If it is determined that the partition audio signal corresponding to a partition position is a navigation audio signal, the navigation audio signal is compensated and modulated to obtain a modulated signal, and the modulated signal is sent to the directional sound source module. The directional sound source module generates and plays the navigation audio signal to the target partition position based on the modulated signal.

[0193] The directional sound source module includes an ultrasonic transducer, which controls the ultrasonic transducer to output a modulated signal based on the target partition position to play the navigation audio signal to the target partition position. Figure 5 , Figure 5 A structural schematic diagram of a directional sound source provided in an embodiment of the present application; a disc-shaped directional sound source comprises a base, an ultrasonic transducer unit and a shell. Preferably, thanks to the penetrability of ultrasonic waves, the directional sound source can be installed in the vehicle interior, display screen, and steering wheel without the use of an additional shell. Among them, the directional sound source for the main driving position is installed in a position such as the steering wheel and the instrument panel that does not block the driving line of sight. The ultrasonic transducer is connected by a circuit board in the base and receives a signal sent by an integrated controller. Directional sound sources are installed in front of four seats in the car, and each directional sound source includes a group of ultrasonic transducer arrays, which can accurately control the propagation direction of the sound and transmit the signal distributed by the integrated controller to each seat in a directionally directed manner.

[0194] Specifically, the compensating modulation processing is performed on the navigation audio signal to obtain a modulated signal, including:

[0195] Step 3011: Based on preset distortion information, perform distortion compensation on the navigation audio signal, and perform frequency band modulation on the navigation audio signal after distortion compensation based on a preset frequency band to obtain a modulated signal.

[0196] Before the directional sound source actually works, the controller calculates the distortion of the high-directional signal through simulation and experimental means to obtain the preset distortion information. The controller uses the distortion compensation algorithm and the preset distortion information to perform distortion compensation on the navigation audio signal, and modulates the navigation audio signal after distortion compensation based on the preset frequency band to obtain a modulated signal, which can improve the fidelity and clarity of the navigation audio signal output by the directional sound source module.

[0197] Exemplarily, when the controller determines that the partition position is the main driving position and the partition audio signal corresponding to the main driving position is the navigation audio signal, the navigation audio signal is distortion compensated based on the preset distortion information, and the navigation audio signal after distortion compensation is frequency modulated based on the preset frequency band to obtain a modulated signal. The directional sound source module in the main driving position generates and plays the navigation audio signal to the main driving position based on the modulated signal. Then, the directional sound source modules corresponding to other partition positions will not play the navigation audio signal corresponding to the main driving position.

[0198] When the controller of this embodiment recognizes that the partition audio signal is a navigation audio signal, it performs distortion compensation on the navigation audio signal based on preset distortion information, and performs frequency band modulation on the navigation audio signal after distortion compensation based on a preset frequency band to obtain a modulated signal; the directional sound source module generates and plays the navigation audio signal to the target partition position based on the modulated signal. This can enhance the clarity and directionality of the navigation audio signal, improve driving safety, and at the same time improve the fidelity and clarity of the navigation audio signal output by the directional sound source module.

[0199] Please refer to Fig.11 , Fig.11 A flowchart of a fourth embodiment of the control method provided in the embodiment of the present application. The acoustic system further includes a privacy voice module, and the method further includes:

[0200] Step 401, receiving a voice signal of a privacy area acquired by the privacy voice module in response to a privacy voice instruction;

[0201] Step 402, generating a shielding signal based on the speech signal;

[0202] Step 403: Control the speaker in the non-privacy area to output the shielding signal to shield the voice signal in the privacy area in the non-privacy area.

[0203] In this embodiment, the privacy voice module responds to the privacy voice command, obtains the voice signal of the privacy area, and sends the voice signal of the privacy area to the controller; the controller receives the voice signal of the privacy area obtained by the privacy voice module in response to the privacy voice command, generates a shielding signal based on the voice signal, and controls the speaker of the non-privacy area to output the shielding signal to shield the voice signal of the privacy area in the non-privacy area. Exemplarily, a privacy function switch is installed at the armrest position of the rear passenger seat of the vehicle, which is directly connected to the controller and supports one-button start of regional shielding; the privacy voice module responds to the privacy voice command of the rear passenger seat, obtains the voice signal of the rear passenger seat, and the controller generates a shielding signal based on the voice signal, and controls the speakers of the main driver seat and the co-driver seat to output the shielding signal to shield the voice signal of the rear passenger seat in the main driver seat and the co-driver seat.

[0204] Furthermore, after determining the voice signal in the privacy area, the controller obtains the sound signal near the passenger's ear through a microphone or other equipment in the non-privacy area of ​​the vehicle, and filters the non-noise signal from the sound signal to obtain a noise signal, wherein the noise signal includes the voice signal in the privacy area; the noise control module generates and outputs a noise control signal based on the noise signal, and controls the speaker in the non-privacy area to play an inverted sound wave based on the noise control signal to reduce the noise of the voice signal in the privacy area, so that the voice signal in the privacy area is shielded from the non-privacy area.

[0205] The controller of this embodiment receives the voice signal of the privacy area obtained by the privacy voice module in response to the privacy voice command, generates a shielding signal based on the voice signal, and controls the speaker of the non-privacy area to output the shielding signal to shield the voice signal of the privacy area in the non-privacy area. The privacy of voice communication in a specific area in the cabin can be achieved, and the user's sense of security and satisfaction can be improved.

[0206] Accordingly, the embodiment of the present application also provides a vehicle, such as Fig.12 As shown, Fig.12 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application. The vehicle 1100 includes a processor 1101 having one or more processing cores, a memory 1102 having one or more computer-readable storage media, and a computer program stored in the memory 1102 and executable on the processor. The processor 1101 is electrically connected to the memory 1102. It will be understood by those skilled in the art that the vehicle structure shown in the figure does not constitute a limitation on the vehicle, and may include more or fewer components than shown, or combine certain components, or arrange the components differently.

[0207] The processor 1101 is the control center of the vehicle 1100, and uses various interfaces and lines to connect various parts of the entire vehicle 1100. By running or loading software programs and / or units stored in the memory 1102, and calling data stored in the memory 1102, it executes various functions of the vehicle 1100 and processes data, thereby monitoring the vehicle 1100 as a whole. The processor 1101 can be a processor CPU, a graphics processor GPU, a network processor (Network Processor, NP), etc., and can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiments of the present application.

[0208] In an embodiment of the present application, the processor 1101 in the vehicle 1100 will load the computer program corresponding to the process of one or more applications into the memory 1102 according to the following steps, and the processor 1101 will run the application stored in the memory 1102 to execute the control method.

[0209] The specific implementation of the above operations can be found in the previous embodiments, which will not be described in detail here.

[0210] Optional, such as Fig.12 As shown, the vehicle 1100 further includes: a touch screen 1103, a radio frequency circuit 1104, an audio circuit 1105, an input unit 1106, and a power supply 1107. The processor 1101 is electrically connected to the touch screen 1103, the radio frequency circuit 1104, the audio circuit 1105, the input unit 1106, and the power supply 1107, respectively. Those skilled in the art will appreciate that Fig.12 The vehicle structure shown in the figure does not constitute a limitation on the vehicle, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0211] The touch display screen 1103 can be used to display a graphical user interface and receive operation instructions generated by the user acting on the graphical user interface. The touch display screen 1103 may include a display panel and a touch panel. Among them, the display panel can be used to display information input by the user or information provided to the user and various graphical user interfaces of the vehicle, which can be composed of graphics, text, icons, videos and any combination thereof. Optionally, the display panel can be configured in the form of a liquid crystal display (LCD, Liquid Crystal Display), an organic light-emitting diode (OLED, Organic Light-Emitting Diode) and the like. The touch panel can be used to collect the user's touch operation on or near it (such as the user uses any suitable object or accessory such as a finger, a stylus, etc. on the touch panel or near the touch panel), and generate corresponding operation instructions, and the operation instructions execute the corresponding program. Optionally, the touch panel may include two parts: a touch detection device and a touch controller. Among them, the touch detection device detects the user's touch orientation, detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into the touch point coordinates, and then sends it to the processor 1101, and can receive the command sent by the processor 1101 and execute it. The touch panel can cover the display panel. When the touch panel detects a touch operation on or near it, it is transmitted to the processor 1101 to determine the type of touch event, and then the processor 1101 provides a corresponding visual output on the display panel according to the type of touch event. In an embodiment of the present application, the touch panel and the display panel can be integrated into the touch display screen 1103 to realize the input and output functions. However, in some embodiments, the touch panel and the touch panel can be used as two independent components to realize the input and output functions. That is, the touch display screen 1103 can also be used as a part of the input unit 1106 to realize the input function.

[0212] The RF circuit 1104 may be used to send and receive RF signals to establish wireless communication with network devices or other vehicles through wireless communication, and to send and receive signals with network devices or other vehicles.

[0213] The audio circuit 1105 can be used to provide an audio interface between the user and the vehicle through a speaker and a microphone. The audio circuit 1105 can transmit the electrical signal converted from the received audio data to the speaker, which is converted into a sound signal for output; on the other hand, the microphone converts the collected sound signal into an electrical signal, which is received by the audio circuit 1105 and converted into audio data, and then the audio data is output to the processor 1101 for processing, and then sent to another vehicle through the radio frequency circuit 1104, or the audio data is output to the memory 1102 for further processing. The audio circuit 1105 may also include an earphone jack to provide communication between an external headset and the vehicle.

[0214] The input unit 1106 may be used to receive input numbers, character information or user feature information (such as fingerprint, iris, facial information, etc.), and generate keyboard, mouse, joystick, optical or trackball signal input related to user settings and function control.

[0215] The power supply 1107 is used to supply power to various components of the vehicle 1100. Optionally, the power supply 1107 can be logically connected to the processor 1101 through a power management device, so that the power management device can manage charging, discharging, and power consumption. The power supply 1107 can also include one or more DC or AC power supplies, recharging devices, power failure detection circuits, power converters or inverters, power status indicators, and other arbitrary components.

[0216] although Fig.12 Not shown, the vehicle 1100 may also include a camera, a sensor, a wireless fidelity module, a Bluetooth module, etc., which will not be described in detail here.

[0217] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0218] Those skilled in the art will appreciate that all or part of the steps in the various methods of the above embodiments may be completed by a computer program, or by controlling related hardware through a computer program. The computer program may be stored in a computer-readable storage medium and loaded and executed by a processor.

[0219] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0220] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0221] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0222] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. An acoustic system, characterized in that: The acoustic system comprises: a controller and a noise control module, wherein: The controller is used to obtain a sound signal, filter out a non-noise signal from the sound signal, and obtain a noise signal; The noise control module is used to generate and output a noise control signal based on the noise signal to reduce noise on the noise signal.

2. The acoustic system according to claim 1, characterized in that The acoustic system includes an error sensor, wherein: The controller is used to filter the non-noise signal from the sound signal through the error sensor pair to obtain a noise signal.

3. The acoustic system according to claim 1, characterized in that The acoustic system includes a sound pickup microphone, wherein: The controller is used to filter out non-noise signals from the sound signal through the sound receiving microphone to obtain a reference sound signal; The controller is used to locate the position of a human ear and determine a noise signal according to the position of the human ear and the reference sound signal.

4. The acoustic system according to claim 1, characterized in that The noise control module includes a filter, wherein: The noise control module is used to input the noise signal into the filter to generate the noise control signal.

5. The acoustic system according to claim 4, characterized in that in: The controller is used to determine a reference noise signal based on motion information corresponding to the vehicle, and to update a filter coefficient in the filter based on the reference noise signal and the noise signal.

6. The acoustic system according to claim 5, characterized in that in: The controller is configured to determine an error signal based on the reference noise signal and the noise signal; The controller is used to update the filter coefficients in the filter based on the reference noise signal and the error signal.

7. The acoustic system according to claim 1, characterized in that The acoustic system further comprises a sound field partitioning module, wherein: The controller is used to obtain the partition audio signal corresponding to each partition position in response to the partition instruction; The sound field partitioning module is used to play the corresponding partition audio signal through the speakers corresponding to each partition position.

8. The acoustic system according to claim 7, characterized in that in: The controller is used to input the audio signal into a preset partition filter set to obtain the partition audio signal corresponding to each partition position.

9. The acoustic system according to claim 7, characterized in that The partition filter set includes partition filters corresponding to each partition position, wherein: The controller is used to control the speakers corresponding to each partition position to play the corresponding excitation source audio based on a preset excitation source control signal, and obtain the partition filter parameters corresponding to each partition position according to the excitation source control signal and the excitation source audio.

10. The acoustic system according to claim 7, characterized in that The acoustic system also includes a directional sound source module, wherein: The controller is used to perform compensation modulation processing on the navigation audio signal to obtain a modulated signal when recognizing that the partition audio signal is a navigation audio signal; The directional sound source module is used to generate and play the navigation audio signal to the target partition position based on the modulated signal.

11. The acoustic system according to claim 10, characterized in that in: The controller is used to perform distortion compensation on the navigation audio signal based on preset distortion information, and to perform frequency band modulation on the navigation audio signal after distortion compensation based on a preset frequency band to obtain a modulated signal.

12. The acoustic system according to claim 10, characterized in that The directional sound source module includes an ultrasonic transducer, wherein: The directional sound source module is used to control the ultrasonic transducer to output the modulated signal based on the target partition position, so as to play the navigation audio signal to the target partition position.

13. The acoustic system according to claim 1, characterized in that The acoustic system also includes a privacy voice module, wherein: The privacy voice module is used to obtain a voice signal in the privacy area in response to the privacy voice instruction; The controller is used to generate a shielding signal based on a voice signal, and control a speaker in a non-privacy area to output the shielding signal, so as to shield the voice signal of the privacy area in the non-privacy area.

14. A control method, characterized in that: The control method is applied to a controller in an acoustic system, the acoustic system further comprising a noise control module, and the method comprises: Acquire a sound signal, and filter a non-noise signal from the sound signal to obtain a noise signal; The noise signal is sent to the noise control module, so that the noise control module generates and outputs a noise control signal based on the noise signal to reduce noise on the noise signal.

15. The control method according to claim 14, characterized in that: The acoustic system includes an error sensor, and filtering the non-noise signal from the sound signal to obtain the noise signal includes: The non-noise signal is filtered out from the sound signal by the error sensor pair to obtain a noise signal.

16. The control method according to claim 14, characterized in that: The acoustic system includes a sound receiving microphone, and the non-noise signal is filtered out from the sound signal to obtain the noise signal, including: Filtering non-noise signals from the sound signal by the sound receiving microphone to obtain a reference sound signal; The position of a human ear is located, and a noise signal is determined according to the position of the human ear and the reference sound signal.

17. The control method according to any one of claims 14 to 15, characterized in that: The noise control module includes a filter, and the method further includes: Get the motion information corresponding to the vehicle; Based on the motion information, determining a reference noise signal; Based on the reference noise signal and the noise signal, the filter coefficient in the filter is updated so that the noise control module inputs the reference noise signal into the filter to generate the noise control signal.

18. The control method according to claim 17, characterized in that: The updating of the filter coefficient in the filter based on the reference noise signal and the noise signal comprises: determining an error signal based on the reference noise signal and the noise signal; The filter coefficients in the filter are updated based on the reference noise signal and the error signal.

19. The control method according to claim 14, characterized in that: The acoustic system further includes a sound field partitioning module, and the method further includes: In response to the partition instruction, the audio signal is input into a preset partition filter set to obtain a partition audio signal corresponding to each partition position; The partition audio signal is sent to the sound field partition module, so that the sound field partition module plays the corresponding partition audio signal through the speakers corresponding to the respective partition positions.

20. The control method according to claim 19, characterized in that: Before the step of inputting the audio signal into a preset partition filter set in response to the partition instruction to obtain the partition audio signal corresponding to each partition position, the step includes: Based on the preset excitation source control signal, the speakers corresponding to each partition position are controlled to play the corresponding excitation source audio; According to the excitation source control signal and the excitation source audio, the partition filter parameters corresponding to each partition position are obtained, and a preset partition filter set is obtained.

21. The control method according to claim 14, characterized in that: The acoustic system further includes a directional sound source module, and the method further includes: When the partition audio signal is identified as a navigation audio signal, compensation modulation processing is performed on the navigation audio signal to obtain a modulated signal; The modulated signal is sent to the directional sound source module, so that the directional sound source module generates and plays the navigation audio signal to the target partition position based on the modulated signal.

22. The control method according to claim 21, characterized in that: The compensating modulation process is performed on the navigation audio signal to obtain a modulated signal, including: Based on the preset distortion information, the navigation audio signal is subjected to distortion compensation, and the navigation audio signal after the distortion compensation is subjected to frequency band modulation based on a preset frequency band to obtain a modulated signal.

23. The control method according to claim 14, characterized in that: The acoustic system further includes a privacy voice module, and the method further includes: receiving a voice signal of a privacy area acquired by the privacy voice module in response to a privacy voice instruction; Based on the speech signal, a masking signal is generated; The speaker in the non-privacy area is controlled to output the shielding signal to shield the voice signal of the privacy area in the non-privacy area.

24. An acoustic device, characterized in that: The acoustic device comprises: one or more processors and a memory; and one or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the processor to implement the control method of any one of claims 14 to 23.

25. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and the computer program is loaded by a processor to execute the steps in the control method according to any one of claims 14 to 23.

26. A vehicle, characterized in that: The acoustic system comprises any one of claims 1 to 13, and the acoustic device comprises the acoustic device of claim 24.

Images