Road noise reduction method and device, equipment, storage medium and vehicle

Abstract

The invention relates to a road noise reduction method and device, equipment, a storage medium and a vehicle, distribution information of people in the vehicle and multiple road noise audio signals are acquired, weights corresponding to the multiple road noise audio signals are determined according to the distribution information of the people in the vehicle, and the road noise is reduced based on the multiple road noise audio signals and the weights corresponding to the multiple road noise audio signals. And road noise elimination signals corresponding to the road noise audio signals are calculated, and a plurality of loudspeakers in the vehicle are controlled to output the road noise elimination signals. According to the embodiment of the invention, the weights corresponding to the road noise audio signals are determined according to the distribution information of the personnel in the vehicle, different pieces of personnel distribution information correspond to different weights, the road noise elimination signals are further calculated and output through the loudspeaker, and different noise reduction processing can be carried out on areas with personnel or without personnel by setting the weights, so that the noise reduction efficiency is improved. The total noise reduction is not pursued, noise reduction is only carried out on the seat area where people sit, and therefore it is guaranteed that the noise reduction effect of the seat area where people sit is the best.

Description

Technical Field

[0001] The present disclosure relates to the technical field of noise processing, and in particular to a road noise reduction method, device, equipment, storage medium and vehicle. Background Art

[0002] Road Noise Cancellation (RNC) refers to the use of active noise control algorithms in vehicle scenarios to eliminate road noise and tire noise during vehicle driving, providing a quiet riding experience for drivers and passengers.

[0003] Existing road noise cancellation solutions directly obtain a noise reference signal by placing a sensor at the target noise location, measure the residual noise signal using a microphone inside the car, and use the noise reference signal and the residual noise signal as inputs to a controller. The controller generates a cancellation signal and drives the speaker to output the cancellation signal to offset the road noise.

[0004] The existing road noise elimination scheme is to reduce the noise of each seat in the car, which can ensure that the total noise reduction of all seats is as large as possible, ensuring the global noise reduction optimization. However, each seat in the car is not always occupied. Although the existing road noise elimination scheme ensures that the total noise reduction is as large as possible, it will also have the following problems: when the seats are not full, the noise reduction amount for the seats without occupants is larger, while the noise reduction amount for the seats with occupants is smaller. Overall, the total noise reduction is large, but the noise reduction effect on the seats with occupants is not good. Summary of the invention

[0005] In order to solve the above technical problems, the present disclosure provides a road noise reduction method, device, equipment, storage medium and vehicle.

[0006] In a first aspect, an embodiment of the present disclosure provides a method for reducing road noise, comprising:

[0007] Obtaining the distribution information of people in the car and multiple road noise audio signals;

[0008] Determining weights corresponding to the plurality of road noise audio signals according to the distribution information of the occupants of the vehicle;

[0009] Calculating road noise cancellation signals respectively corresponding to the plurality of road noise audio signals based on the plurality of road noise audio signals and the weights corresponding to the plurality of road noise audio signals;

[0010] A plurality of speakers in the vehicle are controlled to output the road noise cancellation signal so that the road noise cancellation signal attenuates the plurality of road noise audio signals.

[0011] In some embodiments, obtaining the distribution information of the people in the vehicle includes:

[0012] Capturing images of each seat by an image acquisition device, identifying the images of each seat, and obtaining distribution information of people in the vehicle; or

[0013] According to the signals collected by the gravity sensors of each seat, the seats occupied by the occupants in the vehicle are determined, and the distribution information of the occupants in the vehicle is obtained.

[0014] In some embodiments, acquiring a plurality of road noise audio signals includes:

[0015] The road noise audio signal of each seat is obtained through the audio collection device corresponding to each seat in the vehicle, and each seat in the vehicle is respectively equipped with an audio collection device.

[0016] In some embodiments, determining the weights corresponding to the plurality of road noise audio signals according to the distribution information of the occupants of the vehicle includes:

[0017] Determining whether each seat is occupied by a person according to the distribution information of the people in the vehicle;

[0018] For any seat, if a person is sitting in the seat, the weight of the road noise audio signal of the seat is determined as the first weight;

[0019] If no one is sitting in the seat, the weight of the road noise audio signal of the seat is determined as the second weight.

[0020] In some embodiments, the calculating the road noise cancellation signals respectively corresponding to the multiple road noise audio signals based on the multiple road noise audio signals and the weights corresponding to the multiple road noise audio signals includes:

[0021] Obtaining a relationship between an acceleration signal and a road noise cancellation signal;

[0022] For each road noise audio signal among the plurality of road noise audio signals, deriving the product of the square of the road noise audio signal and the weight corresponding to the road noise audio signal to obtain a first relational expression;

[0023] Derivative the action relationship between the acceleration signal and the road noise cancellation signal to obtain a second relationship;

[0024] A ratio of the first relational expression to the second relational expression is calculated, and the ratio is multiplied by a preset coefficient to obtain a road noise cancellation signal corresponding to the road noise audio signal.

[0025] In some embodiments, controlling a plurality of speakers in the vehicle to output the road noise cancellation signal comprises:

[0026] performing vector addition on the road noise cancellation signals corresponding to the plurality of road noise audio signals to obtain a target road noise cancellation signal;

[0027] A plurality of speakers in the vehicle are controlled to output the target road noise cancellation signal.

[0028] In some embodiments, controlling a plurality of speakers in the vehicle to output the target road noise cancellation signal comprises:

[0029] Determine an audio signal component of the target road noise cancellation signal corresponding to each speaker of the plurality of speakers, wherein a sum of the audio signal components of the target road noise cancellation signal corresponding to each speaker is equal to the target road noise cancellation signal;

[0030] The audio signal component of the target road noise cancellation signal corresponding to each speaker is outputted through each speaker.

[0031] In a second aspect, an embodiment of the present disclosure provides a road noise reduction device, comprising:

[0032] An acquisition module, used to acquire the distribution information of the occupants in the vehicle and multiple road noise audio signals;

[0033] A determination module, configured to determine weights corresponding to the plurality of road noise audio signals according to the distribution information of the occupants of the vehicle;

[0034] a calculation module, configured to calculate road noise cancellation signals respectively corresponding to the plurality of road noise audio signals based on the plurality of road noise audio signals and weights corresponding to the plurality of road noise audio signals;

[0035] The output module is used to control a plurality of speakers in the vehicle to output the road noise cancellation signal so that the road noise cancellation signal weakens the plurality of road noise audio signals.

[0036] In a third aspect, an embodiment of the present disclosure provides an electronic device, including:

[0037] Memory;

[0038] Processor; and

[0039] Computer programs;

[0040] The computer program is stored in the memory and is configured to be executed by the processor to implement the method as described in the first aspect.

[0041] In a fourth aspect, an embodiment of the present disclosure provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program is executed by a processor to implement the method as described in the first aspect.

[0042] In a fifth aspect, an embodiment of the present disclosure further provides a computer program product, which includes a computer program or instructions, and when the computer program or instructions are executed by a processor, the road noise reduction method as described above is implemented.

[0043] The road noise reduction method, device, equipment, storage medium and vehicle provided by the embodiments of the present disclosure obtain distribution information of occupants in the vehicle and multiple road noise audio signals, determine weights corresponding to the multiple road noise audio signals according to the distribution information of the occupants in the vehicle, calculate road noise cancellation signals corresponding to the multiple road noise audio signals based on the multiple road noise audio signals and the weights corresponding to the multiple road noise audio signals, and control multiple speakers in the vehicle to output the road noise cancellation signals so that the road noise cancellation signals weaken the multiple road noise audio signals. In the embodiment of the present disclosure, the weights corresponding to the multiple road noise audio signals are determined according to the distribution information of the occupants in the vehicle, and different occupant distribution information corresponds to different weights. Further, based on the multiple road noise audio signals and the weights corresponding to the multiple road noise audio signals, the road noise cancellation signals respectively corresponding to the multiple road noise audio signals are calculated. In the embodiment of the present disclosure, when the seats are not full, the problem that the noise reduction amount for seats without occupants is large, while the noise reduction amount for seats with occupants is small, the overall noise reduction sum is large, but the noise reduction effect for seats with occupants is not good, can be avoided. By setting weights, noise reduction processing can be performed differently for areas with occupants and areas without occupants. Instead of pursuing the overall noise reduction sum, noise reduction can be performed only for the seat areas with occupants, thereby ensuring the best noise reduction effect in the seat areas with occupants. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0046] Figure 1 A flow chart of a road noise reduction method provided in an embodiment of the present disclosure;

[0047] Figure 2 A flow chart of a road noise reduction method provided by another embodiment of the present disclosure;

[0048] Figure 3 A flow chart of a road noise reduction method provided by another embodiment of the present disclosure;

[0049] Figure 4 A schematic diagram of a road noise reduction framework provided by an embodiment of the present disclosure;

[0050] Figure 5 A schematic diagram of the structure of a road noise reduction device provided in an embodiment of the present disclosure;

[0051] Figure 6 A schematic diagram of the structure of an electronic device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0052] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0053] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0054] The embodiment of the present disclosure provides a method for reducing road noise, which is described below in conjunction with a specific embodiment.

[0055] Figure 1 A flow chart of the road noise reduction method provided in an embodiment of the present disclosure. The method can be applied to vehicle-mounted terminals, which can be portable mobile devices such as smart phones, tablet computers, laptop computers, vehicle-mounted navigation devices, smart sports equipment, etc.; they can also be fixed devices such as personal computers and smart home appliances. The method can be applied to scenarios where road noise is controlled or eliminated. The method can perform noise reduction in a targeted manner, and reduce noise in seating areas where people are seated, thereby ensuring that the noise reduction effect in seating areas where people are seated is the best. It can be understood that the road noise reduction method provided in an embodiment of the present disclosure can also be applied in other scenarios.

[0056] Below Figure 1 The road noise reduction method shown in the figure is introduced, and the specific steps of the method are as follows:

[0057] S101: Obtaining distribution information of people in a vehicle and a plurality of road noise audio signals.

[0058] In this step, the vehicle terminal obtains the distribution information of the occupants and multiple road noise audio signals. The distribution information of the occupants may be the seating positions of the occupants. For example, the distribution information of the occupants is sensed by a visual system, and multiple road noise audio signals are collected by multiple audio collection devices in the vehicle, such as microphones. The multiple audio collection devices are respectively installed in each seat area in the vehicle, and the multiple road noise signals are road noise signals corresponding to each seat area.

[0059] S102: Determine weights corresponding to the plurality of road noise audio signals according to the distribution information of the occupants of the vehicle.

[0060] After obtaining the distribution information of the occupants, the vehicle terminal determines the weights corresponding to the multiple road noise audio signals according to the distribution information of the occupants. The distribution information of the occupants characterizes the seating positions of the occupants. Different occupant distribution information corresponds to different weights, and noise reduction can be focused on the seating areas where occupants are seated, thereby ensuring the best noise reduction effect in the seating areas where occupants are seated.

[0061] S103 : Calculate road noise cancellation signals corresponding to the multiple road noise audio signals respectively based on the multiple road noise audio signals and the weights corresponding to the multiple road noise audio signals.

[0062] After obtaining the distribution information of the occupants, the acceleration signal and the multiple road noise audio signals, the vehicle terminal calculates the road noise cancellation signals corresponding to the multiple road noise audio signals based on the multiple road noise audio signals and the weights corresponding to the multiple road noise audio signals. Figure 4 As shown, the vehicle-mounted terminal may pass the multiple road noise audio signals and the weights corresponding to the multiple road noise audio signals through a filter, and obtain road noise cancellation signals respectively corresponding to the multiple road noise audio signals through the filter.

[0063] In some embodiments, the frequency of the road noise audio signal is consistent with the frequency of the road noise cancellation signal corresponding to the road noise audio signal, the intensity of the road noise audio signal is consistent with the intensity of the road noise cancellation signal corresponding to the road noise audio signal, the phase of the road noise audio signal and the phase of the road noise cancellation signal corresponding to the road noise audio signal differ by an odd multiple of half a cycle, and the road noise audio signal and the road noise cancellation signal corresponding to the road noise audio signal interfere with each other, achieving an active noise reduction effect, thereby improving user experience.

[0064] S104: Control multiple speakers in the vehicle to output the road noise cancellation signal, so that the road noise cancellation signal weakens the multiple road noise audio signals.

[0065] After obtaining the road noise cancellation signals corresponding to the multiple road noise audio signals, the vehicle terminal can control multiple speakers in the vehicle to output the road noise cancellation signals, so that the road noise cancellation signals weaken the multiple road noise audio signals. Figure 4 As shown, the filter sends the road noise cancellation signals corresponding to the multiple road noise audio signals to a speaker group (including multiple speakers), and outputs the road noise cancellation signals through the multiple speakers in the vehicle to offset or weaken the road noise audio signals in the seating area where people are sitting.

[0066] The embodiment of the present disclosure obtains the distribution information of the people in the vehicle and a plurality of road noise audio signals, determines the weights corresponding to the plurality of road noise audio signals according to the distribution information of the people in the vehicle, calculates the road noise cancellation signals corresponding to the plurality of road noise audio signals respectively based on the plurality of road noise audio signals and the weights corresponding to the plurality of road noise audio signals, and controls a plurality of speakers in the vehicle to output the road noise cancellation signals so that the road noise cancellation signals weaken the plurality of road noise audio signals. The embodiment of the present disclosure determines the weights corresponding to the plurality of road noise audio signals according to the distribution information of the people in the vehicle, and different people distribution information corresponds to different weights. Further, based on the plurality of road noise audio signals and the weights corresponding to the plurality of road noise audio signals, the road noise cancellation signals corresponding to the plurality of road noise audio signals respectively are calculated. By setting the weights, the noise reduction processing can be distinguished for the areas with and without people sitting. The overall noise reduction sum is not pursued, and the noise reduction can be performed only for the seat areas with people sitting, thereby ensuring the best noise reduction effect for the seat areas with people sitting.

[0067] Figure 2 A flow chart of a road noise reduction method provided by another embodiment of the present disclosure is shown in FIG. Figure 2 As shown, the method includes the following steps:

[0068] S201: Obtain distribution information of people in the vehicle and multiple road noise audio signals.

[0069] Specifically, the implementation process and principle of S201 and S101 are the same, and will not be repeated here.

[0070] In some embodiments, obtaining the distribution information of people in the vehicle includes: acquiring images of each seat through an image acquisition device, identifying the images of each seat, and obtaining the distribution information of people in the vehicle; or determining the seats occupied by people in the vehicle based on signals collected by gravity sensors of each seat, and obtaining the distribution information of people in the vehicle.

[0071] For example, the vehicle-mounted terminal can collect images of each seat through an image acquisition device, and perform portrait recognition on the images of each seat. If a portrait is recognized, it is determined that there is a person sitting in the seat, thereby obtaining the distribution information of the people in the car; or the vehicle-mounted terminal can determine the seats occupied by the people in the car based on the signals collected by the gravity sensors of each seat, and obtain the distribution information of the people in the car.

[0072] In some embodiments, acquiring multiple road noise audio signals includes: acquiring the road noise audio signal of each seat through an audio acquisition device corresponding to each seat in the vehicle, wherein each seat in the vehicle is respectively configured with an audio acquisition device.

[0073] Optionally, each seat in the vehicle is respectively provided with an audio collection device, and the audio collection device is used to collect road noise audio signals in each seat area. The vehicle-mounted terminal can obtain the road noise audio signals of each seat in the vehicle through the audio collection device corresponding to each seat in the vehicle.

[0074] S202: Determine whether there is a person sitting in each seat according to the distribution information of the people in the vehicle.

[0075] After obtaining the distribution information of the occupants in the vehicle, since the distribution information of the occupants in the vehicle represents the seating position of the occupants in the vehicle, the vehicle-mounted terminal can determine whether there are occupants in each seat.

[0076] S203: For any seat, if a person is sitting in the seat, determine the weight of the road noise audio signal of the seat as a first weight.

[0077] The vehicle terminal determines the weight of the road noise audio signal corresponding to the seat where a person is sitting as the first weight. Figure 4 As shown, the seats are numbered i=0, 1, 2, 3, ..., and k(i) represents the weight of seat i. For example, if a person is seated in seat 1, the weight of the road noise audio signal corresponding to seat 1 can be determined as the first weight. In some embodiments, the first weight can be 1, which can be set by the user, and this embodiment does not limit it.

[0078] S204: If no one is sitting in the seat, determine the weight of the road noise audio signal of the seat as a second weight.

[0079] The vehicle terminal determines the weight of the road noise audio signal corresponding to the seat without a person sitting there as the first weight. For example, if a person is sitting in seat 3, the weight of the road noise audio signal corresponding to seat 3 can be determined as the second weight. In some embodiments, the second weight can be 0, which can be set by the user and is not limited in this embodiment.

[0080] S205 : Calculate road noise cancellation signals corresponding to the multiple road noise audio signals respectively based on the multiple road noise audio signals and the weights corresponding to the multiple road noise audio signals.

[0081] Specifically, the implementation process and principle of S205 and S103 are the same, and will not be repeated here.

[0082] S206 , performing vector addition on the road noise cancellation signals corresponding to the multiple road noise audio signals to obtain a target road noise cancellation signal.

[0083] After calculating the road noise cancellation signals respectively corresponding to the multiple road noise audio signals, the vehicle-mounted terminal performs vector addition on the road noise cancellation signals respectively corresponding to the multiple road noise audio signals to obtain a target road noise cancellation signal.

[0084] S207 : Control multiple speakers in the vehicle to output the target road noise cancellation signal.

[0085] After obtaining the target road noise cancellation signal, the vehicle-mounted terminal can control multiple speakers in the vehicle to output the target road noise cancellation signal, which can offset or weaken the road noise audio signal in the seat area where people are seated.

[0086] Compared with the prior art, the disclosed embodiment obtains the distribution information of the occupants in the vehicle and a plurality of road noise audio signals, and determines whether each seat is occupied by a person according to the distribution information of the occupants in the vehicle. For any seat, if the seat is occupied by a person, the weight of the road noise audio signal of the seat is determined as the first weight; if the seat is not occupied by a person, the weight of the road noise audio signal of the seat is determined as the second weight. Furthermore, based on the plurality of road noise audio signals and the weights corresponding to the plurality of road noise audio signals, the road noise elimination signals corresponding to the plurality of road noise audio signals are calculated, and the road noise elimination signals corresponding to the plurality of road noise audio signals are vector-added to obtain a target road noise elimination signal. Then, the plurality of speakers in the vehicle are controlled to output the target road noise elimination signal. Since it is determined whether each seat is occupied by a person according to the distribution information of the occupants in the vehicle. For any seat, if the seat is occupied by a person, the weight of the road noise audio signal of the seat is determined as the first weight; if the seat is not occupied by a person, the weight of the road noise audio signal of the seat is determined as the second weight. Seats with people and seats without people have different weights. Further, based on the multiple road noise audio signals and the weights corresponding to the multiple road noise audio signals, road noise cancellation signals corresponding to the multiple road noise audio signals are calculated. By setting the weights, noise reduction processing can be performed differently on areas with and without people. Instead of pursuing the overall noise reduction sum, noise reduction can be performed only on the seat area with people, thereby ensuring that the noise reduction effect of the seat area with people is the best.

[0087] Figure 3 A flow chart of a road noise reduction method provided by another embodiment of the present disclosure is shown in FIG. Figure 3 As shown, the method includes the following steps:

[0088] S301: Obtain distribution information of people in the vehicle and multiple road noise audio signals.

[0089] Specifically, the implementation process and principle of S301 and S101 are the same, and will not be repeated here.

[0090] S302: Determine weights corresponding to the plurality of road noise audio signals according to the distribution information of the occupants of the vehicle.

[0091] Specifically, the implementation process and principle of S302 and S102 are the same, and will not be repeated here.

[0092] S303: Obtain an action relationship between the acceleration signal and the road noise cancellation signal.

[0093] Optionally, the vehicle computer obtains an acceleration signal through one or more acceleration sensors installed on the vehicle chassis, inputs the acceleration signal into a preset functional relationship, and obtains an action relationship between the acceleration signal and the road noise cancellation signal. In some embodiments, the action relationship between the acceleration signal and the road noise cancellation signal is pre-stored in the vehicle terminal, and the vehicle terminal obtains the action relationship between the acceleration signal and the road noise cancellation signal. The action relationship between the acceleration signal and the road noise cancellation signal is used to characterize the relationship between the acceleration signal and the road noise cancellation signal.

[0094] S304 . For each road noise audio signal among the multiple road noise audio signals, derive a product of a square of the road noise audio signal and a weight corresponding to the road noise audio signal to obtain a first relationship.

[0095] For example, the road noise audio signal corresponding to seat 1 is y(1), and the weight corresponding to the road noise audio signal is k(1). The first relationship obtained by derivation of the product of the square of the road noise audio signal and the weight corresponding to the road noise audio signal is:

[0096] S305 , deriving the action relationship between the acceleration signal and the road noise cancellation signal to obtain a second relationship.

[0097] For example, the relationship between the acceleration signal and the road noise cancellation signal is w(n), and the relationship between the acceleration signal and the road noise cancellation signal is derived to obtain the second relationship:

[0098] S306: Calculate a ratio of the first relational expression to the second relational expression, and multiply the ratio by a preset coefficient to obtain a road noise cancellation signal corresponding to the road noise audio signal.

[0099] μ is the preset coefficient, S represents the road noise cancellation signal, and S is calculated by the following formula:

[0100]

[0101] S307 . Perform vector addition on the road noise cancellation signals corresponding to the multiple road noise audio signals to obtain a target road noise cancellation signal.

[0102] After obtaining the road noise cancellation signals corresponding to each road noise audio signal, the vehicle terminal performs vector addition on the road noise cancellation signals corresponding to the multiple road noise audio signals to obtain a target road noise cancellation signal. S1 represents the target road noise cancellation signal, M represents the total number of seats, and the target road noise cancellation signal S1 is calculated by the following formula:

[0103]

[0104] In some embodiments, the Figure 4 The filter shown in the figure obtains the target road noise signal, E represents the vector sum of the first relation of each seat, and the filter is:

[0105]

[0106] The parameters and structure of the filter can be adjusted in real time using an adaptive algorithm based on the time-varying statistical characteristics of the input signal. n is the previous layer calculation of the filter, and n+1 represents the current layer calculation.

[0107] S308: Determine an audio signal component of the target road noise cancellation signal corresponding to each speaker among the multiple speakers, wherein a sum of the audio signal components of the target road noise cancellation signal corresponding to each speaker is equal to the target road noise cancellation signal.

[0108] Further, the vehicle terminal determines an audio signal component of the target road noise cancellation signal corresponding to each speaker of the multiple speakers, and the sum of the audio signal components of the target road noise cancellation signal corresponding to each speaker is equal to the target road noise cancellation signal.

[0109] S309: Output, through each speaker, an audio signal component of the target road noise cancellation signal corresponding to each speaker.

[0110] After determining the audio signal component of the target road noise cancellation signal corresponding to each of the multiple speakers, the vehicle-mounted terminal outputs the audio signal component of the target road noise cancellation signal corresponding to each speaker through each speaker, which can offset or weaken the road noise audio signal of the seat area where people are seated.

[0111] The embodiment of the present disclosure obtains the distribution information of the occupants and a plurality of road noise audio signals, and determines the weights corresponding to the plurality of road noise audio signals according to the distribution information of the occupants. Further, obtains the action relationship between the acceleration signal and the road noise cancellation signal, and for each of the plurality of road noise audio signals, derives the product of the square of the road noise audio signal and the weight corresponding to the road noise audio signal to obtain a first relationship, derives the action relationship between the acceleration signal and the road noise cancellation signal to obtain a second relationship, calculates the ratio of the first relationship to the second relationship, and multiplies the ratio by a preset coefficient to obtain the road noise cancellation signal corresponding to the road noise audio signal. Then, vector addition is performed on the road noise cancellation signals corresponding to the plurality of road noise audio signals to obtain a target road noise cancellation signal, and the audio signal component of the target road noise cancellation signal corresponding to each of the plurality of speakers is determined, and the sum of the audio signal components of the target road noise cancellation signal corresponding to each speaker is equal to the target road noise cancellation signal, and the audio signal component of the target road noise cancellation signal corresponding to each speaker is output through each speaker. Compared with the prior art, the embodiment of the present disclosure determines the weights corresponding to the multiple road noise audio signals according to the distribution information of the occupants in the vehicle. Different occupant distribution information corresponds to different weights. By setting the weights, noise reduction processing can be performed differently on areas with and without occupants. The overall noise reduction is not pursued, and noise reduction can be performed only on seat areas with occupants, thereby ensuring that the noise reduction effect in seat areas with occupants is the best.

[0112] Figure 5 Schematic diagram of the structure of the road noise reduction device provided in the embodiment of the present disclosure. The road noise reduction device may be the vehicle-mounted terminal as described in the above embodiment, or the road noise reduction device may be a component or assembly in the vehicle-mounted terminal. The road noise reduction device provided in the embodiment of the present disclosure may execute the processing flow provided in the road noise reduction method embodiment, such as Figure 5As shown, the road noise reduction device 50 includes: an acquisition module 51, a determination module 52, a calculation module 53, and an output module 54; wherein the acquisition module 51 is used to acquire the distribution information of the occupants and a plurality of road noise audio signals; the determination module 52 is used to determine the weights corresponding to the plurality of road noise audio signals according to the distribution information of the occupants; the calculation module 53 is used to calculate the road noise elimination signals respectively corresponding to the plurality of road noise audio signals based on the plurality of road noise audio signals and the weights corresponding to the plurality of road noise audio signals; the output module 54 is used to control a plurality of speakers in the vehicle to output the road noise elimination signals so that the road noise elimination signals weaken the plurality of road noise audio signals.

[0113] Optionally, when the acquisition module 51 acquires the distribution information of the people in the vehicle, it is specifically used to: acquire images of each seat through an image acquisition device, identify the images of each seat, and obtain the distribution information of the people in the vehicle; or determine the seats occupied by the people in the vehicle based on the signals collected by the gravity sensors of each seat, and obtain the distribution information of the people in the vehicle.

[0114] Optionally, when the acquisition module 51 acquires multiple road noise audio signals, it is specifically used to: acquire the road noise audio signal of each seat through an audio acquisition device corresponding to each seat in the vehicle, and each seat in the vehicle is respectively equipped with an audio acquisition device.

[0115] Optionally, when the determination module 52 determines the weights corresponding to the multiple road noise audio signals according to the distribution information of the occupants in the vehicle, it is specifically used to: determine whether each seat is occupied by a person according to the distribution information of the occupants in the vehicle; for any seat, if the seat is occupied by a person, the weight of the road noise audio signal of the seat is determined to be a first weight; if the seat is not occupied by a person, the weight of the road noise audio signal of the seat is determined to be a second weight.

[0116] Optionally, when the calculation module 53 calculates the road noise elimination signals respectively corresponding to the multiple road noise audio signals based on the multiple road noise audio signals and the weights corresponding to the multiple road noise audio signals, it is specifically used to: obtain an action relationship formula between the acceleration signal and the road noise elimination signal; for each road noise audio signal in the multiple road noise audio signals, derive the product of the square of the road noise audio signal and the weight corresponding to the road noise audio signal to obtain a first relationship formula; derive the action relationship formula between the acceleration signal and the road noise elimination signal to obtain a second relationship formula; calculate the ratio of the first relationship formula to the second relationship formula, and multiply the ratio by a preset coefficient to obtain the road noise elimination signal corresponding to the road noise audio signal.

[0117] Optionally, when the output module 54 controls multiple speakers in the vehicle to output the road noise cancellation signal, it is specifically used to: vector add the road noise cancellation signals corresponding to the multiple road noise audio signals to obtain a target road noise cancellation signal; and control multiple speakers in the vehicle to output the target road noise cancellation signal.

[0118] Optionally, when the output module 54 controls multiple speakers in the vehicle to output the target road noise cancellation signal, it is specifically used to: determine the audio signal component of the target road noise cancellation signal corresponding to each speaker among the multiple speakers, the sum of the audio signal components of the target road noise cancellation signal corresponding to each speaker is equal to the target road noise cancellation signal; and output the audio signal component of the target road noise cancellation signal corresponding to each speaker through each speaker.

[0119] Figure 5 The road noise reduction device of the illustrated embodiment can be used to implement the technical solution of the above method embodiment, and its implementation principle and technical effect are similar, which will not be repeated here.

[0120] Figure 6 Schematic diagram of the structure of an electronic device in the embodiment of the present disclosure. Figure 6 , which shows a structural schematic diagram of an electronic device 600 suitable for implementing the embodiments of the present disclosure. Figure 6 The electronic device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present disclosure.

[0121] like Figure 6 As shown, the electronic device 600 may include a processing device (e.g., a central processing unit, a graphics processor, etc.) 601, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 602 or a program loaded from a storage device 608 to a random access memory (RAM) 603 to implement the road noise reduction method of the embodiment described in the present disclosure. In the RAM 603, various programs and data required for the operation of the electronic device 600 are also stored. The processing device 601, the ROM 602, and the RAM 603 are connected to each other via a bus 604. An input / output (I / O) interface 605 is also connected to the bus 604.

[0122] Typically, the following devices may be connected to the I / O interface 605: an input device 606 including, for example, a touch screen, a touch pad, a keyboard, a mouse, a camera, a microphone, an accelerometer, a gyroscope, etc.; an output device 607 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; a storage device 608 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 609. The communication device 609 may allow the electronic device 600 to communicate with other devices wirelessly or by wire to exchange data. Although Figure 6 The electronic device 600 is shown with various devices, but it should be understood that it is not required to implement or possess all the devices shown. More or fewer devices may be implemented or possessed instead.

[0123] In particular, according to an embodiment of the present disclosure, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present disclosure includes a computer program product, which includes a computer program carried on a non-transitory computer-readable medium, and the computer program contains program code for executing the method shown in the flowchart, thereby implementing the road noise reduction method as described above. In such an embodiment, the computer program can be downloaded and installed from the network through the communication device 609, or installed from the storage device 608, or installed from the ROM 602. When the computer program is executed by the processing device 601, the above-mentioned functions defined in the method of the embodiment of the present disclosure are executed.

[0124] It should be noted that the computer-readable medium disclosed above may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in combination with an instruction execution system, device or device. In the present disclosure, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, in which a computer-readable program code is carried. This propagated data signal may take a variety of forms, including but not limited to an electromagnetic signal, an optical signal, or any suitable combination of the above. The computer readable signal medium may also be any computer readable medium other than a computer readable storage medium, which may send, propagate or transmit a program for use by or in conjunction with an instruction execution system, apparatus or device. The program code contained on the computer readable medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (radio frequency), etc., or any suitable combination of the above.

[0125] In addition, an embodiment of the present disclosure further provides a vehicle, comprising: a memory; a processor; and a computer program; wherein the computer program is stored in the memory and is configured to be executed by the processor to implement the road noise reduction method as described above.

[0126] In some embodiments, the client and the server may communicate using any currently known or future developed network protocol such as HTTP (HyperText Transfer Protocol), and may be interconnected with any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network ("LAN"), a wide area network ("WAN"), an internet (e.g., the Internet), and a peer-to-peer network (e.g., an ad hoc peer-to-peer network), as well as any currently known or future developed network.

[0127] The computer-readable medium may be included in the electronic device, or may exist independently without being installed in the electronic device.

[0128] The computer-readable medium carries one or more programs. When the one or more programs are executed by the electronic device, the electronic device:

[0129] Obtaining the distribution information of people in the car and multiple road noise audio signals;

[0130] Determining weights corresponding to the plurality of road noise audio signals according to the distribution information of the occupants of the vehicle;

[0131] Calculating road noise cancellation signals respectively corresponding to the plurality of road noise audio signals based on the plurality of road noise audio signals and the weights corresponding to the plurality of road noise audio signals;

[0132] A plurality of speakers in the vehicle are controlled to output the road noise cancellation signal so that the road noise cancellation signal attenuates the plurality of road noise audio signals.

[0133] Optionally, when the above one or more programs are executed by the electronic device, the electronic device may also execute other steps described in the above embodiments.

[0134] Computer program code for performing the operations of the present disclosure may be written in one or more programming languages ​​or a combination thereof, including, but not limited to, object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0135] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present disclosure. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some implementations as replacements, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0136] The units involved in the embodiments described in the present disclosure may be implemented by software or hardware, wherein the name of a unit does not, in some cases, constitute a limitation on the unit itself.

[0137] The functions described above herein may be performed at least in part by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that may be used include: field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), and the like.

[0138] In the context of the present disclosure, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or equipment. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or equipment, or any suitable combination of the foregoing. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0139] The above description is only a preferred embodiment of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of disclosure involved in the present disclosure is not limited to the technical solutions formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosed concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present disclosure (but not limited to) by each other to form a technical solution.

[0140] In addition, although each operation is described in a specific order, this should not be understood as requiring these operations to be performed in the specific order shown or in a sequential order. Under certain circumstances, multitasking and parallel processing may be advantageous. Similarly, although some specific implementation details are included in the above discussion, these should not be interpreted as limiting the scope of the present disclosure. Some features described in the context of a separate embodiment can also be implemented in a single embodiment in combination. On the contrary, the various features described in the context of a single embodiment can also be implemented in multiple embodiments individually or in any suitable sub-combination mode.

[0141] Although the subject matter has been described in language specific to structural features and / or methodological logical actions, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. On the contrary, the specific features and actions described above are merely example forms of implementing the claims.

Claims

1. A method for reducing road noise, characterized in that: include: Obtaining the distribution information of people in the car and multiple road noise audio signals; Determining weights corresponding to the plurality of road noise audio signals according to the distribution information of the occupants of the vehicle; Calculating road noise cancellation signals respectively corresponding to the plurality of road noise audio signals based on the plurality of road noise audio signals and the weights corresponding to the plurality of road noise audio signals; A plurality of speakers in the vehicle are controlled to output the road noise cancellation signal so that the road noise cancellation signal attenuates the plurality of road noise audio signals.

2. The method according to claim 1, characterized in that The obtaining of the distribution information of the people in the vehicle includes: Capturing images of each seat by an image acquisition device, identifying the images of each seat, and obtaining distribution information of people in the vehicle; or According to the signals collected by the gravity sensors of each seat, the seats occupied by the occupants in the vehicle are determined, and the distribution information of the occupants in the vehicle is obtained.

3. The method according to claim 1, characterized in that Acquire multiple road noise audio signals, including: The road noise audio signal of each seat is obtained through the audio collection device corresponding to each seat in the vehicle, and each seat in the vehicle is respectively equipped with an audio collection device.

4. The method according to claim 1, characterized in that: The determining weights corresponding to the plurality of road noise audio signals according to the distribution information of the occupants of the vehicle includes: Determining whether each seat is occupied by a person according to the distribution information of the people in the vehicle; For any seat, if a person is sitting in the seat, the weight of the road noise audio signal of the seat is determined as the first weight; If no one is sitting in the seat, the weight of the road noise audio signal of the seat is determined as the second weight.

5. The method according to claim 1, characterized in that The calculating, based on the plurality of road noise audio signals and the weights corresponding to the plurality of road noise audio signals, the road noise cancellation signals respectively corresponding to the plurality of road noise audio signals comprises: Obtaining a relationship between an acceleration signal and a road noise cancellation signal; For each road noise audio signal among the plurality of road noise audio signals, deriving the product of the square of the road noise audio signal and the weight corresponding to the road noise audio signal to obtain a first relational expression; Derivative the action relationship between the acceleration signal and the road noise cancellation signal to obtain a second relationship; A ratio of the first relational expression to the second relational expression is calculated, and the ratio is multiplied by a preset coefficient to obtain a road noise cancellation signal corresponding to the road noise audio signal.

6. The method according to claim 1, characterized in that The controlling a plurality of speakers in the vehicle to output the road noise cancellation signal comprises: performing vector addition on the road noise cancellation signals corresponding to the plurality of road noise audio signals to obtain a target road noise cancellation signal; A plurality of speakers in the vehicle are controlled to output the target road noise cancellation signal.

7. The method according to claim 6, characterized in that The controlling a plurality of speakers in the vehicle to output the target road noise cancellation signal comprises: Determine an audio signal component of the target road noise cancellation signal corresponding to each speaker of the plurality of speakers, wherein a sum of the audio signal components of the target road noise cancellation signal corresponding to each speaker is equal to the target road noise cancellation signal; The audio signal component of the target road noise cancellation signal corresponding to each speaker is outputted through each speaker.

8. A road noise reduction device, characterized in that: include: An acquisition module, used to acquire the distribution information of the occupants in the vehicle and multiple road noise audio signals; A determination module, configured to determine weights corresponding to the plurality of road noise audio signals according to the distribution information of the occupants of the vehicle; a calculation module, configured to calculate road noise cancellation signals respectively corresponding to the plurality of road noise audio signals based on the plurality of road noise audio signals and weights corresponding to the plurality of road noise audio signals; The output module is used to control a plurality of speakers in the vehicle to output the road noise cancellation signal so that the road noise cancellation signal weakens the plurality of road noise audio signals.

9. An electronic device, characterized in that: include: Memory; processor; as well as Computer programs; The computer program is stored in the memory and is configured to be executed by the processor to implement the method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

11. A vehicle, characterized in that: include: Memory; processor; as well as Computer programs; The computer program is stored in the memory and is configured to be executed by the processor to implement the method according to any one of claims 1 to 7.

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