A sound field optimization method, device, equipment and readable storage medium

Abstract

The present invention provides an acoustic field optimization method, device, equipment and readable storage medium, which constructs a first acoustic response model for the in-vehicle control area and a second acoustic response model for the in-vehicle non-control area; based on the first acoustic response model and the second acoustic response model, constructs a first acoustic response difference calculation model; takes the maximization of the acoustic response difference between the control area and the non-control area as the constraint condition of the first acoustic response difference calculation model, and calculates the optimal solution of the audio parameters corresponding to the audio parameters to be calculated of each speaker; controls each speaker to output audio signals respectively according to the corresponding optimal solution of the audio parameters. Through the implementation of the present invention, by taking the maximization of the acoustic response difference between the control area and the non-control area as the constraint condition to control different speakers to output audio signals, an ideal sound zone isolation degree is achieved, which can provide users with a more extreme acoustic listening experience and optimize the acoustic field effect of the control area where users are located in the vehicle.

Description

Technical Field

[0001] The present invention relates to the field of acoustic technologies, and particularly to a sound field optimization method, device, equipment, and readable storage medium.

Background Art

[0002] With the rapid development of intelligent cockpit technologies, the audio system, as an important part of the intelligent cockpit, can provide an indispensable audio-visual experience for passengers. Nowadays, with the continuous improvement of user requirements, higher requirements are put forward for the functional characteristics of the intelligent cockpit audio system, and the in-vehicle independent sound zone is one of the current strong demands of users.

[0003] Currently, there are already some technical solutions that can achieve a certain degree of in-vehicle independent sound zone effect. For example, the directivity radiation control of sound is carried out by using the speakers at the back of the seat, or the near-field radiation control of sound is carried out by using the speakers at the headrest of the seat, or the anti-phase sound source cancellation is carried out by using the speakers on the door, etc. However, these solutions still have the problem of poor sound field effect. Even some solutions can only achieve mono-channel independent sound zone partitioning in specific control areas, and cannot achieve stereo or multi-channel sound fields in the partitioned areas of the independent sound zone, which often results in poor actual sound experience at each partition position.

Summary of the Invention

[0004] The purpose of the present invention is to provide a sound field optimization method, device, equipment, and readable storage medium, which can at least solve the problem of poor sound field effect of the in-vehicle independent sound zone in the related technologies.

[0005] To solve the above technical problems, an embodiment of the present invention provides a sound field optimization method, which is applied to an intelligent cockpit audio system. The intelligent cockpit audio system includes a first speaker and a second speaker respectively arranged on the front row seat and the rear row seat on the same side. The first speaker is arranged at the back of the front row seat, and the second speaker is arranged at the headrest of the rear row seat. The sound field optimization method includes:

[0006] Based on the audio parameters to be calculated of each speaker, the acoustic response transfer function, and the first acoustic transfer function relative to the reference position in the control area, a first acoustic response model is constructed, and based on the audio parameters to be calculated, the acoustic response transfer function, and the second acoustic transfer function relative to the reference position in the non-control area, a second acoustic response model is constructed; wherein, the control area is the rear row seat partition where the rear row passenger is currently sitting, and the non-control area is the rear row seat partition where the rear row passenger is not currently sitting;

[0007] Based on the first acoustic response model and the second acoustic response model, a first acoustic response difference calculation model is constructed;

[0008] Taking the maximization of the acoustic response difference between the control area and the non-control area as the constraint condition of the first acoustic response difference calculation model, calculate the optimal solutions of the audio parameters corresponding to the to-be-calculated audio parameters of each speaker;

[0009] Control each speaker to output an audio signal according to the corresponding optimal solution of the audio parameters respectively.

[0010] An embodiment of the present invention also provides an acoustic field optimization device, which is applied to an in-vehicle infotainment system. The in-vehicle infotainment system includes a first speaker and a second speaker respectively arranged on the front row seat and the rear row seat on the same side. The first speaker is arranged at the back of the front row seat, and the second speaker is arranged at the headrest of the rear row seat. The acoustic field optimization device includes:

[0011] A first construction module, configured to construct a first acoustic response model based on the to-be-calculated audio parameters of each speaker, the acoustic response transfer function, and the first acoustic transfer function relative to the reference position in the control area, and construct a second acoustic response model based on the to-be-calculated audio parameters, the acoustic response transfer function, and the second acoustic transfer function relative to the reference position in the non-control area; wherein, the control area is the rear row seat partition where the rear row passengers are currently sitting, and the non-control area is the rear row seat partition where the rear row passengers are not currently sitting;

[0012] A second construction module, configured to construct a first acoustic response difference calculation model based on the first acoustic response model and the second acoustic response model;

[0013] A calculation module, configured to take the maximization of the acoustic response difference between the control area and the non-control area as the constraint condition of the first acoustic response difference calculation model, and calculate the optimal solutions of the audio parameters corresponding to the to-be-calculated audio parameters of each speaker;

[0014] A control module, configured to control each speaker to output an audio signal according to the corresponding optimal solution of the audio parameters respectively.

[0015] An embodiment of the present invention also provides a terminal device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, each step in the acoustic field optimization method provided by the above embodiment of the present invention is implemented.

[0016] An embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, each step in the acoustic field optimization method provided by the above embodiment of the present invention is implemented.

[0017] As can be seen from the above, according to the sound field optimization method, device, equipment and readable storage medium provided by the embodiments of the present invention, a first acoustic response model is constructed for the in-vehicle control area and a second acoustic response model is constructed for the in-vehicle non-control area; based on the first acoustic response model and the second acoustic response model, a first acoustic response difference calculation model is constructed; taking the maximization of the acoustic response difference between the control area and the non-control area as the constraint condition of the first acoustic response difference calculation model, calculating the optimal solution of the audio parameters corresponding to the to-be-calculated audio parameters of each speaker; controlling each speaker to output an audio signal according to the corresponding optimal solution of the audio parameters. Through the implementation of the present invention, controlling the audio signals output by different speakers with the maximization of the acoustic response difference between the control area and the non-control area as the constraint condition achieves an ideal sound zone isolation degree, can provide a more extreme acoustic listening experience for users, and optimizes the sound field effect of the control area where the user is located in the vehicle.

Description of the Drawings

[0018] Figure 1 It is a layout schematic diagram of an intelligent cockpit audio system provided by the first embodiment of the present invention;

[0019] Figure 2 It is a basic process schematic diagram of the sound field optimization method provided by the first embodiment of the present invention;

[0020] Figure 3 It is an acoustic response schematic diagram of an audio signal propagating to the in-vehicle control area provided by the first embodiment of the present invention;

[0021] Figure 4 It is another acoustic response schematic diagram of an audio signal propagating to the in-vehicle control area provided by the first embodiment of the present invention;

[0022] Figure 5 It is an acoustic response schematic diagram of an audio signal propagating to the in-vehicle non-control area provided by the first embodiment of the present invention;

[0023] Figure 6 It is an acoustic response schematic diagram of a virtual audio signal propagating to the in-vehicle control area provided by the first embodiment of the present invention;

[0024] Figure 7 It is a program module schematic diagram of the sound field optimization device provided by the second embodiment of the present invention;

[0025] Figure 8 It is a structural schematic diagram of the terminal device provided by the third embodiment of the present invention.

Detailed Embodiments

[0026] In order to make the objectives, features, and advantages of the present invention more obvious and understandable, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0027] To solve the problem of poor sound field effect of the independent sound zone in the vehicle in the related art, the first embodiment of the present invention provides a sound field optimization method, which is applied to an intelligent cockpit audio system. The intelligent cockpit audio system includes a first speaker and a second speaker respectively arranged on the front row seat and the rear row seat on the same side. The first speaker is arranged at the back of the front row seat, and the second speaker is arranged at the headrest of the rear row seat. In practical applications, the intelligent cockpit audio system includes, but is not limited to, a stereo system, a multi-channel system, and a headphone system. In a preferred embodiment, the speaker in this embodiment is a moving coil full-band miniature vehicle speaker with a size of 30*60*12mm, and other types or sizes of speakers can also be used.

[0028] As Figure 1 is a layout schematic diagram of an intelligent cockpit audio system provided in this embodiment. The first speaker in this embodiment is preferably a speaker array group, and the speaker array group includes a plurality of speaker arrays with different installation positions (such as Figure 1 shown by the number 1 in Figure 1 ), and the second speaker is a headrest speaker group, and a plurality of headrest speakers can be arranged at the headrest position of each rear row seat (such as

[0029] shown by the number 2 in

[0030] As Figure 2 is a basic flowchart of the sound field optimization method provided in this embodiment. The sound field optimization method includes the following steps:

[0031] Step 201: Based on the audio parameters to be calculated of each speaker, the acoustic response transfer function, and the first acoustic transfer function relative to the reference position in the control area, construct a first acoustic response model, and based on the audio parameters to be calculated, the acoustic response transfer function, and the second acoustic transfer function relative to the reference position in the non-control area, construct a second acoustic response model.

[0032] Specifically, in practical applications, the rear seats of a car are usually divided into left and right partitions. The control area in this embodiment is the rear seat partition where the rear passenger is currently sitting, which can be understood as the listening area where the target passenger is located. The non-control area is the rear seat partition where the rear passenger is not currently sitting, which can be understood as other areas where the target passenger is not located.

[0033] It should be noted that the acoustic transfer function in this embodiment refers to the ratio of the Laplace transform value (or z-transform) of the response (i.e., output) quantity of a linear system under zero initial conditions to the Laplace transform value of the excitation (i.e., input) quantity, denoted as H = Y / U, where Y and U are the Laplace transform values of the output quantity and the input quantity respectively. The acoustic transfer function is one of the basic mathematical tools for describing the dynamic characteristics of a linear system and one of the main tools for studying classical control theory. In practical applications, the acoustic transfer function in this embodiment can be directly measured from the actual situation inside the vehicle.

[0034] In some implementation manners of this embodiment, the step of constructing the first acoustic response model based on the audio parameters to be calculated of each speaker, the acoustic response transfer function, and the first acoustic transfer function relative to the reference position in the control area includes: constructing the first acoustic response model based on the audio parameters to be calculated of each speaker, the acoustic response transfer function, and the first acoustic transfer function relative to the positions of the ears on different sides of the rear passengers in the control area respectively.

[0035] As Figure 3 is a schematic diagram of the acoustic response when an audio signal propagates to the control area inside the vehicle provided by this embodiment. As Figure 4 is another schematic diagram of the acoustic response when an audio signal propagates to the control area inside the vehicle provided by this embodiment. The speaker array group on the back of the front seat includes speaker 3, speaker 4, speaker 5, and speaker 6, and the headrest speakers of the rear seat include speaker 7 and speaker 8. For the passengers on the right side of the rear row, the position on the right side of the rear row is the control area 9, and the position on the left side of the rear row is the non-control area 10. In this embodiment, the optimization process of the sound field at the position on the right side of the rear row is mainly used as an example for description, and the position on the left side of the rear row is symmetric to the right side, and the processing method belongs to the same concept. For the specific implementation, reference can be made to the subsequent implementation manners, and this embodiment will not be repeated here.

[0036] As Figure 3 and 4 shown, H 1R 、H 2R 、H 3R 、H 4R 、H 5R 、H 6R respectively represent the acoustic transfer functions of speaker 3, speaker 4, speaker 5, speaker 6, speaker 7, and speaker 8 relative to the right ear of the rear passenger at the control area 9, and H 1L, H 2L , H 3L , H 4L , H 5L , H 6L respectively represent the acoustic transfer functions from speakers 3, 4, 5, 6, 7, and 8 to the left ear of the passenger in the control area 9. Additionally, if the audio parameter to be calculated for the outputs of speakers 3, 4, 5, 6, 7, and 8 to be controlled are S1, S2, S3, S4, S5, and S6 respectively, then after electro-acoustic conversion by speakers 3, 4, 5, 6, 7, and 8, the finally output physical sounds are S1·h1, S2·h2, S3·h3, S4·h4, S5·h5, and S6·h6, where h1 to h6 represent the acoustic response transfer functions of speakers 3, 4, 5, 6, 7, and 8. Then the first acoustic response model at the left ear of the rear passenger in the control area 9 can be expressed as:

[0037] [S1·h1 S2·h2 S3·h3 S4·h4 S5·h5 S6·h6][H 1L H 2L H 3L H 4L H 5L H 6L T

[0038] where, T represents the transpose calculation of the matrix.

[0039] Similarly, the first acoustic response model at the right ear of the rear passenger in the control area 9 can be expressed as:

[0040] [S1·h1 S2·h2 S3·h3 S4·h4 S5·h5 S6·h6][H 1R H 2R H 3R H 4R H 5R H 6R T

[0041] In addition, as Figure 5 is a schematic diagram of the acoustic response of an audio signal propagating to a non-control area in the vehicle, where H 1D , H 2D , H 3D , H 4D , H 5D , H 6D ​​respectively represent the acoustic transfer functions of speakers 3, 4, 5, 6, 7, and 8 relative to the non-control area 10. Then, the second acoustic response model at the non-control area 10 can be expressed as:

[0042] [S1·h1 S2·h2 S3·h3 S4·h4 S5·h5 S6·h6][H 1D H 2D H 3D H 4D H 5D H 6D T

[0043] Step 102: Based on the first acoustic response model and the second acoustic response model, construct a first acoustic response difference calculation model.

[0044] Specifically, in order to achieve the sound field effect of an independent sound zone in the vehicle, it should be ensured that after the audio signal propagates through space, the acoustic response difference between the control area and the non-control area is maximized. In this embodiment, after calculating the acoustic responses of the control area and the non-control area respectively, the two are subtracted to obtain an acoustic response difference calculation model.

[0045] Step 103: Taking the maximization of the acoustic response difference between the control area and the non-control area as the constraint condition of the first acoustic response difference calculation model, calculate the optimal solutions of the audio parameters corresponding to the audio parameters to be calculated for each speaker.

[0046] Specifically, the audio parameters S1, S2, S3, S4, S5, and S6 of the audio signals output by speakers 3, 4, 5, 6, 7, and 8 in this embodiment should respectively satisfy the optimal solutions of the following conditions:

[0047]

[0048] where || represents calculating the modulus of the vector. Through the processing optimization of this part, the acoustic response difference between the control area 9 and the non-control area 10 can be maximized, achieving an ideal sound zone isolation degree.

[0049] ​Further, in some embodiments of the present embodiment, before the step of calculating the optimal solution of the audio parameters corresponding to the audio parameters to be calculated for each speaker with the maximum acoustic response difference between the control region and the non-control region as the constraint condition of the first acoustic response difference calculation model, it further includes: respectively constructing a third acoustic response model based on the simulated audio parameters of the virtual speakers oppositely arranged at different side ear positions of the rear passengers, the acoustic response transfer function, and the third acoustic transfer function relative to the corresponding side ear positions; constructing a second acoustic response difference calculation model based on the first acoustic response model and the third acoustic response model.

[0050] Correspondingly, the step of calculating the optimal solution of the audio parameters corresponding to the audio parameters to be calculated for each speaker with the maximum acoustic response difference between the control region and the non-control region as the constraint condition of the first acoustic response difference calculation model includes: calculating the optimal solution of the audio parameters corresponding to the audio parameters to be calculated for each speaker jointly with the maximum acoustic response difference between the control region and the non-control region as the constraint condition of the first acoustic response difference calculation model and the minimum difference between the actual acoustic response and the simulated acoustic response as the constraint condition of the second acoustic response difference calculation model.

[0051] As Figure 6 FIG. is a schematic diagram of the acoustic response of a virtual audio signal propagating to the control region in the vehicle interior provided in this embodiment. Specifically, in this embodiment, the left-channel virtual speaker 11 and the right-channel virtual speaker 12 are respectively located on the left and right sides of the passengers in the control region. It should be noted that the left-channel virtual speaker 11 and the right-channel virtual speaker 12 are only used for measuring and determining the target acoustic response, and there is no speaker at this position during actual use. Then, the target acoustic response of the left ear of the rear passenger in the control region is:

[0052] S L ·h L ·H LL

[0053] Wherein, S L is the audio parameter corresponding to the simulated left-channel audio signal, h L is the acoustic response transfer function of the left-channel virtual speaker 11, and H LL is the acoustic transfer function from the left-channel virtual speaker 11 to the position of the left ear of the passenger in the control region.

[0054] Correspondingly, the target acoustic response of the right ear of the rear passenger in the control region is:

[0055] S R ·h R ·H RR

[0056] Wherein, S RAudio parameters corresponding to the simulated right-channel audio signal, h R Acoustic response transfer function of the right-channel virtual speaker 12, H RR Acoustic transfer function from the right-channel virtual speaker 12 to the position of the passenger's right ear within the control area.

[0057] Furthermore, while optimizing the aforementioned sound zone isolation, sound zone sound field optimization processing is also carried out, so that the audio signal actually transmitted into the passenger's ear in the control area is consistent with or as close as possible to the response generated by the target acoustic system to be simulated in the control area. Then, the audio signal finally output by the speaker should also meet the following conditions at the same time:

[0058]

[0059] Among them, || represents calculating the modulus value of the vector. Through the optimization of this part, the actual acoustic listening experience generated by the speaker array group composed of speakers 3, 4, 5, 6, 7, 8 and the headrest speaker at the passenger position in the control area can be optimized to be closest to the acoustic listening experience generated by the left-channel virtual speaker 11 and the right-channel virtual speaker 12 at the passenger position in the control area, so as to further optimize the sound field effect in the control area while achieving the independent sound zone zoning effect.

[0060] Similarly, the speaker array group and the headrest speaker on the left side of the rear seat can refer to the aforementioned implementation method for the same optimization processing, which will not be elaborated in this embodiment.

[0061] In addition, the distance d between the speaker array groups will affect the result of the acoustic transfer function. Therefore, in actual design, it can be appropriately adjusted according to the actual situation and design objectives.

[0062] Step 104: Control each speaker to output an audio signal according to the optimal solution of the corresponding audio parameter.

[0063] Specifically, after all speakers output audio signals, the sound transmitted into the passenger's ear is the superposition sum of the sounds emitted by the speaker array group and the headrest speaker at the position of the passenger's ear in the control area. In this embodiment, the front-row seat speaker array group and the rear-row seat headrest speaker are used to simulate the response of the target acoustic system object while maximizing the acoustic response difference between the control area and the non-control area, so that the difference between the actual acoustic response and the simulated acoustic response in the control area is minimized, and further optimize the sound field of the independent sound zone in the vehicle. Its advantage is that while meeting the in-vehicle independent sound zone control, it optimizes the sound field effect in the control area and provides a better acoustic experience for users.

[0064] Compared with the related art, the sound field optimization method provided in this embodiment constructs a first acoustic response model for the in-vehicle control area and a second acoustic response model for the in-vehicle non-control area; based on the first acoustic response model and the second acoustic response model, constructs a first acoustic response difference calculation model; takes the maximization of the acoustic response difference between the control area and the non-control area as the constraint condition of the first acoustic response difference calculation model, calculates the optimal solution of the audio parameters corresponding to the audio parameters to be calculated of each speaker; controls each speaker to output an audio signal according to the corresponding optimal solution of the audio parameters. Through the implementation of the present invention, by taking the maximization of the acoustic response difference between the control area and the non-control area as the constraint condition to control the audio signals output by different speakers, an ideal sound zone isolation degree is achieved, which can provide users with a more extreme acoustic listening experience and optimize the sound field effect of the control area where users are located in the vehicle.

[0065] Figure 7 This is a sound field optimization device provided in the second embodiment of the present invention. This sound field optimization device is applied to an intelligent cockpit audio system. The intelligent cockpit audio system includes a first speaker and a second speaker respectively arranged on the front row seat and the rear row seat on the same side. The first speaker is arranged at the back of the front row seat, and the second speaker is arranged at the headrest of the rear row seat. As Figure 7 shown, this sound field optimization device mainly includes:

[0066] A first construction module 701, configured to construct a first acoustic response model based on the audio parameters to be calculated of each speaker, the acoustic response transfer function, and the first acoustic transfer function relative to the reference position in the control area, and construct a second acoustic response model based on the audio parameters to be calculated, the acoustic response transfer function, and the second acoustic transfer function relative to the reference position in the non-control area; wherein, the control area is the rear row seat partition where the rear row passenger is currently sitting, and the non-control area is the rear row seat partition where the rear row passenger is not currently sitting;

[0067] A second construction module 702, configured to construct a first acoustic response difference calculation model based on the first acoustic response model and the second acoustic response model;

[0068] A calculation module 703, configured to take the maximization of the acoustic response difference between the control area and the non-control area as the constraint condition of the first acoustic response difference calculation model, and calculate the optimal solution of the audio parameters corresponding to the audio parameters to be calculated of each speaker;

[0069] A control module 704, configured to control each speaker to output an audio signal according to the corresponding optimal solution of the audio parameters.

[0070] In an optional implementation manner of this embodiment, the first construction module is specifically configured to: respectively construct a first acoustic response model based on the audio parameters to be calculated of each speaker, the acoustic response transfer function, and the first acoustic transfer function with respect to the positions of the ears on different sides of the rear passengers within the control area.

[0071] Further, in an optional implementation manner of this embodiment, the first construction module is further configured to: respectively construct a third acoustic response model based on the simulated audio parameters of the virtual speakers oppositely arranged at the positions of the ears on different sides of the rear passengers, the acoustic response transfer function, and the third acoustic transfer function with respect to the positions of the ears on the corresponding sides; the second construction module is further configured to: construct a second acoustic response difference calculation model based on the first acoustic response model and the third acoustic response model; the calculation module is specifically configured to: take the maximization of the acoustic response difference between the control area and the non-control area as the constraint condition of the first acoustic response difference calculation model, and take the minimization of the difference between the actual acoustic response and the simulated acoustic response as the constraint condition of the second acoustic response difference calculation model, and jointly calculate the optimal solutions of the audio parameters corresponding to the audio parameters to be calculated of each speaker.

[0072] In an optional implementation manner of this embodiment, the first speaker is a speaker array group, and the speaker array group includes a plurality of speaker arrays with different installation positions.

[0073] It should be noted that the sound field optimization method in the first embodiment can be implemented based on the sound field optimization device provided in this embodiment. Those of ordinary skill in the art can clearly understand that for the convenience and conciseness of description, the specific working process of the sound field optimization device described in this embodiment can refer to the corresponding process in the foregoing method embodiment, and will not be elaborated herein.

[0074] Compared with the related art, the sound field optimization device provided in this embodiment constructs a first acoustic response model for the vehicle interior control area and a second acoustic response model for the vehicle interior non-control area; constructs a first acoustic response difference calculation model based on the first acoustic response model and the second acoustic response model; takes the maximization of the acoustic response difference between the control area and the non-control area as the constraint condition of the first acoustic response difference calculation model, calculates the optimal solutions of the audio parameters corresponding to the audio parameters to be calculated of each speaker; and controls each speaker to output an audio signal according to the corresponding optimal solution of the audio parameters. Through the implementation of the present invention, by taking the maximization of the acoustic response difference between the control area and the non-control area as the constraint condition to control the output of audio signals by different speakers, an ideal sound zone isolation degree is achieved, which can provide a more extreme acoustic listening experience for users and optimize the sound field effect in the control area where users are located in the vehicle.

[0075] Please refer to Figure 8 , Figure 8A terminal device provided for the third embodiment of the present invention. This terminal device can be used to implement the sound field optimization method in the foregoing embodiments. As Figure 8 shown, this terminal device mainly includes:

[0076] A memory 801, a processor 802, a bus 803, and a computer program stored on the memory 801 and executable on the processor 802. The memory 801 and the processor 802 are connected through the bus 803. When the processor 802 executes this computer program, it implements the sound field optimization method in the foregoing embodiments. Among them, the number of processors can be one or more.

[0077] The memory 801 can be a high-speed random access memory (RAM, Random Access Memory), or a non-volatile memory, such as a disk memory. The memory 801 is used to store executable program codes, and the processor 802 is coupled to the memory 801.

[0078] Furthermore, an embodiment of the present invention also provides a computer-readable storage medium. This computer-readable storage medium can be set in the terminal device in the foregoing embodiments. This computer-readable storage medium can be the Figure 8 memory in the foregoing embodiments shown.

[0079] A computer program is stored on this computer-readable storage medium. When this program is executed by the processor, it implements the sound field optimization method in the foregoing embodiments. Furthermore, this computer-readable storage medium can also be various media such as a USB flash drive, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a RAM, a magnetic disk, or an optical disc that can store program codes.

[0080] In several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of modules is only a logical function division. In actual implementation, there can be other division methods. For example, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of devices or modules can be in electrical, mechanical, or other forms.

[0081] The modules described as separate components may or may not be physically separated. The components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed across multiple network modules. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0082] In addition, in each embodiment of the present invention, the functional modules can be integrated into one processing module, or each module can exist physically alone, or two or more modules can be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software functional modules.

[0083] If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a readable storage medium and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in each embodiment of the present invention. The aforementioned readable storage medium includes: various media such as USB flash drives, mobile hard disks, ROM, RAM, magnetic disks, or optical discs that can store program codes.

[0084] It should be noted that for the foregoing method embodiments, for the sake of simplicity of description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the present invention is not limited by the described action sequence, because according to the present invention, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0085] In the above embodiments, the descriptions of each embodiment have their own emphases. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0086] The above is the description of the sound field optimization method, device, equipment, and readable storage medium provided by the present invention. For those skilled in the art, according to the idea of the embodiments of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. An acoustic field optimization method, characterized in that, Applied to the intelligent cockpit audio system, the intelligent cockpit audio system includes a first speaker and a second speaker respectively disposed on the front row seat and the rear row seat on the same side. The first speaker is disposed at the back of the front row seat, and the second speaker is disposed at the headrest of the rear row seat. The sound field optimization method includes: Based on the audio parameters to be calculated of each speaker, the acoustic response transfer function, and the first acoustic transfer function relative to the reference position within the control area, construct a first acoustic response model, and based on the audio parameters to be calculated, the acoustic response transfer function, and the second acoustic transfer function relative to the reference position outside the control area, construct a second acoustic response model; wherein, the control area is the rear row seat partition where the rear row passengers are currently sitting, and the non-control area is the rear row seat partition where the rear row passengers are not currently sitting; Based on the first acoustic response model and the second acoustic response model, construct a first acoustic response difference calculation model; Taking the maximization of the acoustic response difference between the control area and the non-control area as the constraint condition of the first acoustic response difference calculation model, calculate the optimal solutions of the audio parameters corresponding to the audio parameters to be calculated of each speaker; Control each speaker to output an audio signal according to the corresponding optimal solution of the audio parameters respectively.

2. The acoustic field optimization method according to claim 1, characterized in that, The step of constructing the first acoustic response model based on the audio parameters to be calculated of each speaker, the acoustic response transfer function, and the first acoustic transfer function relative to the reference position within the control area includes: Based on the audio parameters to be calculated of each speaker, the acoustic response transfer function, and the first acoustic transfer function relative to the positions of the ears on different sides of the rear row passengers within the control area, respectively construct a first acoustic response model.

3. The acoustic field optimization method according to claim 2, characterized in that, Before the step of taking the maximization of the acoustic response difference between the control area and the non-control area as the constraint condition of the first acoustic response difference calculation model and calculating the optimal solutions of the audio parameters corresponding to the audio parameters to be calculated of each speaker, it further includes: Based on the simulated audio parameters of the virtual speakers oppositely arranged relative to the positions of the ears on different sides of the rear row passengers, the acoustic response transfer function, and the third acoustic transfer function relative to the positions of the ears on the corresponding side, respectively construct a third acoustic response model; Based on the first acoustic response model and the third acoustic response model, construct a second acoustic response difference calculation model; The step of taking the maximization of the acoustic response difference between the control area and the non-control area as the constraint condition of the first acoustic response difference calculation model and calculating the optimal solutions of the audio parameters corresponding to the audio parameters to be calculated of each speaker includes: Taking the maximization of the acoustic response difference between the control area and the non-control area as the constraint condition of the first acoustic response difference calculation model, and taking the minimization of the difference between the actual acoustic response and the simulated acoustic response as the constraint condition of the second acoustic response difference calculation model, jointly calculate the optimal solutions of the audio parameters corresponding to the audio parameters to be calculated of each speaker.

4. The acoustic field optimization method according to any one of claims 1 to 3, characterized in that, The first speaker is a speaker array group, and the speaker array group includes a plurality of speaker arrays with different installation positions.

5. An acoustic field optimization device, characterized in that, Applied to an in-vehicle infotainment system audio system, the in-vehicle infotainment system audio system includes a first speaker and a second speaker respectively arranged on the front row seat and the rear row seat on the same side. The first speaker is arranged at the back of the front row seat, and the second speaker is arranged at the headrest of the rear row seat. The sound field optimization device includes: A first construction module, configured to construct a first acoustic response model based on the audio parameters to be calculated of each speaker, the acoustic response transfer function, and the first acoustic transfer function relative to the reference position in the control area, and construct a second acoustic response model based on the audio parameters to be calculated of each speaker, the acoustic response transfer function, and the second acoustic transfer function relative to the reference position in the non-control area; wherein, the control area is the rear row seat partition where the rear row passengers are currently sitting, and the non-control area is the rear row seat partition where the rear row passengers are not currently sitting; A second construction module, configured to construct a first acoustic response difference calculation model based on the first acoustic response model and the second acoustic response model; A calculation module, configured to calculate the optimal solution of the audio parameters corresponding to the audio parameters to be calculated of each speaker with the maximization of the acoustic response difference between the control area and the non-control area as the constraint condition of the first acoustic response difference calculation model; A control module, configured to control each speaker to output an audio signal according to the corresponding optimal solution of the audio parameters respectively.

6. The acoustic field optimization device according to claim 5, characterized in that, The first construction module is specifically configured to: respectively construct a first acoustic response model based on the audio parameters to be calculated of each speaker, the acoustic response transfer function, and the first acoustic transfer function relative to the positions of the ears on different sides of the rear row passengers in the control area.

7. The acoustic field optimization device according to claim 6, characterized in that, The first construction module is further configured to: respectively construct a third acoustic response model based on the simulated audio parameters of the virtual speakers oppositely arranged relative to the positions of the ears on different sides of the rear row passengers, the acoustic response transfer function, and the third acoustic transfer function relative to the positions of the ears on the corresponding side; The second construction module is further configured to: construct a second acoustic response difference calculation model based on the first acoustic response model and the third acoustic response model; The calculation module is specifically configured to: jointly calculate the optimal solution of the audio parameters corresponding to the audio parameters to be calculated of each speaker with the maximization of the acoustic response difference between the control area and the non-control area as the constraint condition of the first acoustic response difference calculation model, and with the minimization of the difference between the actual acoustic response and the simulated acoustic response as the constraint condition of the second acoustic response difference calculation model.

8. The acoustic field optimization device according to any one of claims 5 to 7, characterized in that, The first speaker is a speaker array group, and the speaker array group includes a plurality of speaker arrays with different installation positions.

9. A terminal device, comprising: A memory, a processor, and a computer program stored on the memory and executable on the processor, wherein when the processor executes the computer program, the steps in the method according to any one of claims 1 to 4 are implemented.

10. A computer-readable storage medium, on which a computer program is stored, characterized in that, When the computer program is executed by a processor, it implements the steps in the method according to any one of claims 1 to 4.

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