Active noise reduction method and device for controllable noise reduction area, equipment and storage medium

Abstract

The invention discloses an active noise reduction method and device for a controllable noise reduction area, equipment and a storage medium, and relates to the technical field of active noise reduction, and the method comprises the steps: carrying out the recognition of a movable error microphone in response to an adjustment error microphone signal, and obtaining the three-dimensional coordinates of the movable error microphone; determining a corresponding target space region according to the three-dimensional coordinates; the active noise reduction strategy is called for the target space area for noise reduction processing, the distance between the error microphone and the human ear can be adjusted at any time, a set of new active noise reduction adjusting mechanism is established based on the system after the distance is manually adjusted, the problem that the distance between the error real vehicle microphone and the human ear position is too large is solved, and the user experience is improved. And the noise reduction effect at the human ears is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of active noise reduction, and in particular to an active noise reduction method, device, equipment and storage medium with a controllable noise reduction area. Background Art

[0002] Active noise reduction technology (ANC) has become increasingly popular in the automotive industry in recent years. Virtual sound transmission technology is commonly used in the industry, which can extend the "quiet zone" at the actual error sensor by a certain distance (generally the extended distance is relatively short, for example: about 20cm).

[0003] However, when using an active noise reduction system in a car, the placement of the error microphone will be affected by many factors. In many cases, the error microphone is placed too far away from the human ear, exceeding the range of 1 / 10 of the noise wavelength, which reduces the noise reduction effect and the user also perceives that the noise reduction effect is not obvious.

[0004] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of the present invention is to provide an active noise reduction method, device, equipment and storage medium with a controllable noise reduction zone, aiming to solve the technical problem that the distance between the error microphone and the human ear is too large.

[0006] To achieve the above object, the present invention provides an active noise reduction method with a controllable noise reduction zone, and the active noise reduction method with a controllable noise reduction zone comprises the following steps:

[0007] In response to the adjustment error microphone signal, identifying the movable error microphone to obtain the three-dimensional coordinates of the movable error microphone;

[0008] Determine a corresponding target space region according to the three-dimensional coordinates;

[0009] An active noise reduction strategy is invoked to perform noise reduction processing on the target spatial area.

[0010] In one embodiment, the step of determining the corresponding target space area according to the three-dimensional coordinates includes:

[0011] The three-dimensional coordinates of the movable error microphone and the three-dimensional coordinates of the spatial region are matched through a three-dimensional coordinate model to determine the corresponding target spatial region.

[0012] In one embodiment, the step of matching the three-dimensional coordinates of the movable error microphone with the three-dimensional coordinates of the spatial region through a three-dimensional coordinate model to determine the corresponding target spatial region includes:

[0013] Numbering the spatial regions respectively based on the three-dimensional coordinates of the spatial regions;

[0014] determining, according to the three-dimensional coordinates of the movable error microphone, in the order of the numbers, whether the three-dimensional coordinates of the movable error microphone are within the three-dimensional coordinates of the space region;

[0015] When the three-dimensional coordinates of the movable error microphone are not within the three-dimensional coordinates of the spatial region, matching is continued until the three-dimensional coordinates of the movable error microphone are within the three-dimensional coordinates of the spatial region, thereby determining the target spatial region.

[0016] In one embodiment, the step of invoking an active noise reduction algorithm to perform noise reduction processing on the target spatial area includes:

[0017] Determining a corresponding target secondary pathway model according to the target spatial region;

[0018] Based on the target secondary pathway model, a corresponding active noise reduction strategy is called to perform noise reduction processing on the target spatial area.

[0019] In one embodiment, before the step of matching the three-dimensional coordinates of the movable error microphone with the three-dimensional coordinates of the spatial region through the three-dimensional coordinate model to determine the corresponding target spatial region, the step further includes:

[0020] The length, width and height of the interior space of the vehicle are equally divided into preset lengths to obtain a preset number of space areas;

[0021] Performing secondary pathway identification on the spatial regions respectively to obtain a preset number of secondary pathway models corresponding to the spatial regions;

[0022] A three-dimensional coordinate model is established to identify the space region, and the three-dimensional coordinates of the space region are obtained to match the three-dimensional coordinates of the movable error microphone.

[0023] In one embodiment, the step of performing secondary path identification on the spatial regions respectively to obtain a preset number of secondary path models corresponding to the spatial regions includes:

[0024] Extract features from the spatial regions using a deep learning model to obtain features corresponding to each spatial region;

[0025] The features are subjected to secondary pathway identification, and a preset number of secondary pathway models corresponding to the spatial region are established.

[0026] In one embodiment, before the step of identifying the movable error microphone, the method further includes:

[0027] In response to the error microphone adjustment signal, the electromagnet current is controlled to decrease until a signal indicating that the error microphone adjustment is completed is received, and then the electromagnet current is controlled to increase to complete the position adjustment of the movable error microphone.

[0028] In addition, to achieve the above-mentioned purpose, the present invention also proposes an active noise reduction device with a controllable noise reduction area, the device comprising:

[0029] a data acquisition module, configured to identify the movable error microphone in response to the adjustment error microphone signal, and obtain the three-dimensional coordinates of the movable error microphone;

[0030] An analysis module, used to determine a corresponding target space region according to the three-dimensional coordinates;

[0031] The noise reduction module is used to call an active noise reduction strategy to perform noise reduction processing on the target space area.

[0032] In addition, to achieve the above-mentioned objectives, the present invention also proposes an active noise reduction device with a controllable noise reduction zone, the device comprising: a memory, a processor, and an active noise reduction program for the controllable noise reduction zone stored in the memory and executable on the processor, the active noise reduction program for the controllable noise reduction zone being configured to implement the steps of the active noise reduction method for the controllable noise reduction zone as described above.

[0033] In addition, to achieve the above-mentioned purpose, the present invention also proposes a storage medium, on which an active noise reduction program for a controllable noise reduction zone is stored. When the active noise reduction program for the controllable noise reduction zone is executed by a processor, the steps of the active noise reduction method for the controllable noise reduction zone as described above are implemented.

[0034] One or more technical solutions proposed in this application have at least the following technical effects:

[0035] In response to the adjustment of the error microphone signal, the movable error microphone is identified to obtain the three-dimensional coordinates of the movable error microphone; based on the three-dimensional coordinates, the corresponding target spatial area is determined; the active noise reduction strategy is called to perform noise reduction processing on the target spatial area, thereby realizing the adjustable distance between the error microphone and the human ear at any time. At the same time, based on the system after the distance is manually adjusted, a new active noise reduction adjustment mechanism is established, which solves the problem of the large distance between the error real vehicle microphone and the human ear, thereby ensuring the noise reduction effect at the human ear. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0037] In order to more clearly illustrate the embodiments of the present application 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.

[0038] Figure 1 A flow chart of an active noise reduction method for a controllable noise reduction zone according to an embodiment of the present invention;

[0039] Figure 2 A model diagram of an active noise reduction device with adjustable quiet zone provided in Example 1 of the active noise reduction method with controllable noise reduction zone of the present application;

[0040] Figure 3 A schematic diagram of electromagnetic force control logic provided for the first embodiment of the active noise reduction method for controllable noise reduction area of ​​the present application;

[0041] Figure 4 A flow chart of the active noise reduction method for controllable noise reduction areas provided in Example 2 of the present application;

[0042] Figure 5 A logic diagram of a control method for adjusting the position of a noise reduction zone provided in Example 2 of an active noise reduction method for a controllable noise reduction zone of the present application;

[0043] Figure 6 A schematic diagram of the division of the vehicle interior space area provided in Example 2 of the active noise reduction method with controllable noise reduction area of ​​the present application;

[0044] Figure 7 A flow chart of the active noise reduction method with controllable noise reduction area provided in Example 3 of the present application;

[0045] Figure 8 This is a schematic diagram of the module structure of the active noise reduction device with controllable noise reduction area according to an embodiment of the present application;

[0046] Fig. 9 Schematic diagram of the device structure of the hardware operating environment involved in the active noise reduction method with controllable noise reduction zone in the embodiment of the present application.

[0047] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0048] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0049] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0050] It should be noted that the execution subject of this embodiment may be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device capable of realizing the above functions, an active noise reduction device with a controllable noise reduction zone, etc. The following takes the active noise reduction device with a controllable noise reduction zone as an example to illustrate this embodiment and the following embodiments.

[0051] Based on this, the embodiment of the present application provides an active noise reduction method with a controllable noise reduction area, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the active noise reduction method with controllable noise reduction area of ​​the present application.

[0052] In this embodiment, the active noise reduction method of the controllable noise reduction area includes steps S10 to S30:

[0053] Step S10, identifying the movable error microphone in response to the adjustment error microphone signal, and obtaining the three-dimensional coordinates of the movable error microphone;

[0054] It should be noted that when the position of the microphone is adjusted according to people's needs, the secondary path at the new microphone position needs to be re-identified in order to correctly run the active noise reduction algorithm.

[0055] It should be understood that the adjustment error microphone signal is a signal sent by a user to adjust the position of the vehicle error microphone.

[0056] In a specific implementation, after the user manually adjusts the position of the error microphone, the adjusted microphone is identified through an optical device such as a vehicle-mounted camera, and its position is located in three dimensions to determine the coordinate value of the adjusted microphone.

[0057] Furthermore, before the step of identifying the movable error microphone, the method further includes:

[0058] In response to the error microphone adjustment signal, the electromagnet current is controlled to decrease until a signal indicating that the error microphone adjustment is completed is received, at which time the electromagnet current is controlled to increase to complete the position adjustment of the movable error microphone.

[0059] It should be noted that when using an active noise reduction system in a car, the placement of the error microphone will be affected by many factors. In many cases, the error microphone is too far away from the human ear, exceeding the range of 1 / 10 of the noise wavelength, which reduces the noise reduction effect and makes the user feel that the noise reduction effect is not obvious. This strategy is to solve the above technical problems. By using this strategy, the distance between the error microphone and the human ear can be adjusted at will, so that the "quiet zone" can be kept next to the human ear at any time, ensuring the noise reduction effect of the active noise reduction system at the human ear.

[0060] According to the needs, this strategy can set the "quiet zone" at any position in the car; that is, no matter where the human ear is in the car, the position of the error microphone can be adjusted to make the human ear fall within the "quiet zone". Whether the passenger is sitting, lying, or leaning on the side in the car, the passenger can feel the effect of active noise reduction.

[0061] It should be understood that in this strategy, when people need quietness near their ears, they can manually place the error microphone in a suitable position and adjust the microphone stand close to the human ear to achieve the purpose of quieting the human ear.

[0062] In the specific implementation, when the active noise reduction system is turned on, the electromagnet starts to be energized, generating magnetic force, which sucks the microphone and its bracket to the ceiling or ABC columns. When people need to adjust the position of the microphone, the electromagnet current is weakened to reduce the magnetic force, making it easier for people to remove and adjust the microphone position. When people adjust the microphone position to the right position, the electromagnet current is increased to increase the magnetic force, so that the microphone and its bracket can be firmly fixed in the adjusted position.

[0063] like Figure 2 As shown, Figure 2 The model diagram of the active noise reduction device with adjustable quiet zone includes an electromagnet, a microphone holder, a body A-pillar, a body B-pillar, a body C-pillar, a car metal roof and an error microphone. A position adjustment device (such as an electromagnet) can be arranged in positions such as the ceiling, ABC pillars, etc. in the car, so that the error microphone can be suspended at any position in the car. It should be understood that the specific model diagram and the error microphone position adjustment method are not unique.

[0064] like Figure 3 As shown, Figure 3 This is a logical diagram of electromagnetic force control. After the active noise reduction system is turned on, the controller controls the electromagnet to be energized to generate magnetic force. When the system receives a signal from the user that the microphone position needs to be adjusted, the controller controls the electromagnet current to weaken and reduce the magnetic force. When the system receives a signal from the user that the microphone adjustment is complete, the controller controls the electromagnet current to increase and increase the magnetic force to the original magnetic force. At this point, the error microphone position adjustment is completed.

[0065] The heights of car users vary, so the distance from the ears to the error microphones is different for passengers of different heights. For short users, the distance from the ears to the microphones is even beyond the range of the "quiet zone", resulting in reduced or no noise reduction effect, and even noise increase in severe cases. This strategy solves this problem and can be applied to passengers of all heights, so that different passengers can enjoy the active noise reduction effect without compromise; it can be applied to a variety of passenger sitting positions; passengers can sit, lie on their backs, lie on their sides, etc. in the car, and a "quiet zone" can be placed at their ears, so that the quiet zone of active noise reduction is not affected by the passenger's sitting position.

[0066] And to further save costs, generally, an active noise reduction system is equipped with a microphone at each seat in the car, and at least one microphone is configured at each seat (some are equipped with two microphones at each position). Therefore, for a 5-seat car, at least 5 error microphones are configured in the car. After using the present invention, since the position of the microphone is adjustable, different seats in the car can share the microphone. In many cases, family cars are not fully occupied. The present invention generally configures 2-3 microphones in the car to meet the number of passengers in most cases. If two passengers sit very close, the microphone can be moved between the two people and share one microphone.

[0067] Step S20, determining the corresponding target space area according to the three-dimensional coordinates;

[0068] It should be noted that the three-dimensional coordinates mentioned in this step are the three-dimensional coordinates of the movable error microphone, the target space area and the position of the adjusted movable error microphone.

[0069] In the specific implementation, the interior space of the car is divided into areas: the interior space of the car is divided into areas every 10 cm in three directions: length (from front to back), width (from left to right) and height (from top to bottom), and each area is numbered in sequence.

[0070] The secondary pathways of each divided and numbered area are identified respectively, and the secondary pathway model of each area is established. Each identified model data is stored in the active noise reduction controller. The secondary pathway data of each area corresponds to its number.

[0071] A three-dimensional coordinate model of the interior space of the vehicle is established, and the three-dimensional coordinate boundaries of each cubic area after the above division are identified, so that each divided grid area is represented by three-dimensional coordinates.

[0072] When the user manually adjusts the position of the error microphone, the adjusted microphone is identified by an optical device such as a vehicle-mounted camera, and its position is located in three dimensions to determine the coordinate value of the adjusted microphone. The three-dimensional coordinate value of the microphone is used as input to determine which numbered cube area the three-dimensional coordinate of the error microphone is in.

[0073] Step S30: Invoke an active noise reduction strategy to perform noise reduction processing on the target spatial area.

[0074] It should be noted that the active noise reduction strategy can be to start the active noise reduction system so that it starts to generate an anti-phase signal. The sound with an opposite phase to the noise meets the original noise in space, resulting in destructive interference, thereby achieving the noise reduction effect.

[0075] In the specific implementation, after determining which numbered cube area the three-dimensional coordinates of the error microphone is in after the division, the secondary path model data of the area corresponding to the number is searched and called, and the found secondary path data is called to the active noise reduction algorithm. At this time, the active noise reduction algorithm will establish an active noise reduction system at the adjusted microphone position and run the active noise reduction program to achieve the noise reduction effect.

[0076] The present embodiment provides an active noise reduction method with a controllable noise reduction zone. In response to the adjustment of the error microphone signal, the movable error microphone is identified to obtain the three-dimensional coordinates of the movable error microphone; based on the three-dimensional coordinates, the corresponding target space area is determined; the active noise reduction strategy is called to perform noise reduction processing on the target space area, thereby realizing the adjustable distance between the error microphone and the human ear at any time. At the same time, based on the system after the distance is manually adjusted, a new active noise reduction adjustment mechanism is established, which solves the problem of the large distance between the error real vehicle microphone and the human ear, thereby ensuring the noise reduction effect at the human ear.

[0077] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can be referred to the above introduction, and will not be repeated in the following. Figure 4 , step S20 includes steps S201 to S204:

[0078] Step S201, dividing the interior space of the vehicle into equal parts in length, width and height by preset lengths to obtain a preset number of space regions;

[0079] like Figure 5 As shown, Figure 5 The present invention is a logic diagram of a control method with adjustable noise reduction zone position. First, a three-dimensional coordinate model of the interior space of the vehicle is established, the interior space of the vehicle is divided into regions, numbered, and the boundary coordinates of each divided region are set. Secondary pathways are identified for each divided region, and each identified secondary pathway data is stored in an active noise reduction controller. When the user adjusts the position of the microphone, the new three-dimensional coordinates of the microphone are input to determine in which region the microphone is located. After the target region is determined, the secondary pathway data of the target region is retrieved, the secondary pathway data is substituted into the active noise reduction algorithm, and the active noise reduction algorithm is run to achieve the noise reduction effect.

[0080] In the specific implementation, Figure 6 As shown, the interior space of the vehicle is divided into areas: the interior space of the vehicle is divided into areas every 10 cm in length (from front to back), width (from left to right) and height (from top to bottom), and each area is numbered in sequence.

[0081] It should be noted that this strategy uses 10 cm as the preset length and eight equal divisions, which can be adjusted according to actual needs.

[0082] Step S202, performing secondary path identification on the spatial regions respectively to obtain a preset number of secondary path models corresponding to the spatial regions;

[0083] In the specific implementation, the secondary path identification is performed on each divided and numbered area, and the secondary path model at each area position is established. The data of each identified model is stored in the active noise reduction controller. The secondary path data of each area corresponds to its number.

[0084] Furthermore, the step S202 includes:

[0085] The deep learning model is used to extract features from the spatial region to obtain the features corresponding to each spatial region;

[0086] The features are identified as secondary pathways, and a preset number of secondary pathway models corresponding to the spatial region are established.

[0087] It should be noted that feature extraction is to use the deep learning model to extract the acoustic characteristics of different spatial regions, and identify the secondary path of each spatial region through the trained deep learning model based on the extracted features. The secondary path refers to the sound wave propagation path from the speaker to the error microphone.

[0088] Step S203 , establishing a three-dimensional coordinate model to identify the space region, and obtaining the three-dimensional coordinates of the space region to match the three-dimensional coordinates of the movable error microphone.

[0089] Step S204 , matching the three-dimensional coordinates of the movable error microphone with the three-dimensional coordinates of the spatial region through a three-dimensional coordinate model to determine a corresponding target spatial region.

[0090] In the specific implementation, a three-dimensional space coordinate system is established to describe the position and size of each area in the space. Then the specific position of each space area is identified through the three-dimensional coordinate model, and a corresponding three-dimensional coordinate is matched to each space area.

[0091] It should be noted that the matching process is to number the spatial regions based on the three-dimensional coordinates of the spatial regions; determine whether the movable error microphone is within the coordinates of a certain spatial region in order of numbering according to the three-dimensional coordinates of the movable error microphone; if the coordinates of the error microphone are not within the coordinates of any spatial region, continue matching until a matching region is found.

[0092] Furthermore, the step S204 includes:

[0093] The spatial regions are numbered respectively based on the three-dimensional coordinates of the spatial regions;

[0094] According to the three-dimensional coordinates of the movable error microphone, determining in order of numbers whether the three-dimensional coordinates of the movable error microphone are within the three-dimensional coordinates of the space region;

[0095] When the three-dimensional coordinates of the movable error microphone are not in the three-dimensional coordinates of the spatial region, matching is continued until the three-dimensional coordinates of the movable error microphone are in the three-dimensional coordinates of the spatial region, and the target spatial region is determined.

[0096] This embodiment provides an active noise reduction method with a controllable noise reduction zone. Based on the system after manually adjusting the distance, a new active noise reduction adjustment mechanism is established to solve the problem of the large distance between the actual vehicle microphone and the human ear position, thereby ensuring the noise reduction effect at the human ear.

[0097] Based on the first and second embodiments of the present application, in the third embodiment of the present application, the same or similar contents as those in the above embodiments can be referred to the above introduction, and will not be described in detail later. Figure 7 , step S20 includes steps S301-S302:

[0098] Step S301, determining a corresponding target secondary pathway model according to a target spatial region;

[0099] It should be noted that the secondary path model refers to the acoustic path from the speaker to the error microphone (the microphone used to capture the noise reduction effect).

[0100] In the specific implementation, after determining the three-dimensional coordinates of the error microphone, the system matches the coordinates with the preset spatial region to determine which numbered cubic region the microphone is located in. Each cubic region is associated with a specific secondary path model, which contains the acoustic characteristics of the region and the optimal control strategy.

[0101] Step S302: Calling a corresponding active noise reduction strategy based on the target secondary pathway model to perform noise reduction processing on the target spatial area.

[0102] It should be noted that active noise reduction strategies can include using microphones to capture ambient noise. These microphones can be feedback or feedforward; the noise signal is then analyzed by a digital signal processor (DSP) and an anti-phase signal is generated. The frequency and amplitude of this anti-phase signal are the same as the original noise, but the phase is 180 degrees different so that it is opposite to the original noise; the anti-phase signal is then played by a speaker, and when it meets the original noise, the two will interfere destructively, thereby achieving a noise reduction effect.

[0103] It should be understood that this strategy supports the use of multiple microphones and speakers to optimize the noise reduction effect. By continuously adjusting the noise reduction algorithm based on real-time data to adapt to changes in the environment and noise characteristics, it can effectively reduce the noise in the target space area and improve the clarity and comfort of the sound.

[0104] In the specific implementation, after determining which numbered cube area the three-dimensional coordinates of the error microphone is in after the division, the secondary path model data of the area corresponding to the number is searched and called, and the found secondary path data is called to the active noise reduction algorithm. At this time, the active noise reduction algorithm will establish an active noise reduction system at the adjusted microphone position and run the active noise reduction program to achieve the noise reduction effect.

[0105] This embodiment provides an active noise reduction method for a controllable noise reduction area, which determines the corresponding target secondary pathway model according to the target spatial area; based on the target secondary pathway model, the corresponding active noise reduction strategy is called to perform noise reduction processing on the target spatial area. In this way, the vehicle's active noise reduction system can effectively reduce noise in a specific area and provide a more comfortable auditory environment.

[0106] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the active noise reduction method of the controllable noise reduction zone of the present application. More simple transformations based on this technical concept are all within the protection scope of the present application.

[0107] This application also provides an active noise reduction device with a controllable noise reduction area, please refer to Figure 8 , the active noise reduction device of the controllable noise reduction area includes:

[0108] A data acquisition module 10, for identifying the movable error microphone in response to the adjustment error microphone signal, and obtaining the three-dimensional coordinates of the movable error microphone;

[0109] An analysis module 20, for determining a corresponding target space region according to the three-dimensional coordinates;

[0110] The noise reduction module 30 is used to perform noise reduction processing on the target spatial area by invoking an active noise reduction strategy.

[0111] The active noise reduction device with controllable noise reduction zone provided by the present application adopts the active noise reduction method with controllable noise reduction zone in the above embodiment, which can solve the technical problem that the distance between the error microphone and the human ear is too large. Compared with the prior art, the beneficial effects of the active noise reduction device with controllable noise reduction zone provided by the present application are the same as the beneficial effects of the active noise reduction method with controllable noise reduction zone provided by the above embodiment, and other technical features of the active noise reduction device with controllable noise reduction zone are the same as the features disclosed in the above embodiment method, which will not be repeated here.

[0112] In one embodiment, the analysis module 20 is further configured to identify the movable error microphone in response to the adjustment error microphone signal, and obtain the three-dimensional coordinates of the movable error microphone;

[0113] According to the three-dimensional coordinates, determine the corresponding target space area;

[0114] The active noise reduction strategy is called to perform noise reduction processing on the target spatial area.

[0115] In one embodiment, the analysis module 20 is further configured to match the three-dimensional coordinates of the movable error microphone with the three-dimensional coordinates of the spatial region through a three-dimensional coordinate model to determine the corresponding target spatial region.

[0116] In one embodiment, the analysis module 20 is further used to number the spatial regions respectively based on the three-dimensional coordinates of the spatial regions;

[0117] According to the three-dimensional coordinates of the movable error microphone, determining in order of numbers whether the three-dimensional coordinates of the movable error microphone are within the three-dimensional coordinates of the space region;

[0118] When the three-dimensional coordinates of the movable error microphone are not in the three-dimensional coordinates of the spatial region, matching is continued until the three-dimensional coordinates of the movable error microphone are in the three-dimensional coordinates of the spatial region, and the target spatial region is determined.

[0119] In one embodiment, the noise reduction module 30 is further used to determine a corresponding target secondary pathway model according to the target spatial region;

[0120] Based on the target secondary pathway model, the corresponding active noise reduction strategy is called to perform noise reduction on the target spatial area.

[0121] In one embodiment, the analysis module 20 is further used to equally divide the length, width and height of the interior space of the vehicle into preset lengths to obtain a preset number of space regions;

[0122] Performing secondary pathway identification on the spatial regions respectively, and obtaining a preset number of secondary pathway models corresponding to the spatial regions;

[0123] A three-dimensional coordinate model is established to identify the spatial region, and the three-dimensional coordinates of the spatial region are obtained to match the three-dimensional coordinates of the movable error microphone.

[0124] In one embodiment, the analysis module 20 is further used to extract features of the spatial region through a deep learning model to obtain features corresponding to each spatial region;

[0125] The features are identified as secondary pathways, and a preset number of secondary pathway models corresponding to the spatial region are established.

[0126] In one embodiment, the data acquisition module 10 is further configured to respond to the error microphone adjustment signal and control the electromagnet current to weaken until receiving a signal indicating that the error microphone adjustment is completed, and then control the electromagnet current to increase to complete the position adjustment of the movable error microphone.

[0127] The present application provides an active noise reduction device with a controllable noise reduction zone, and the active noise reduction device with a controllable noise reduction zone includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the active noise reduction method for the controllable noise reduction zone in the above-mentioned embodiment 1.

[0128] Reference below Fig. 9 , which shows a schematic diagram of the structure of an active noise reduction device suitable for realizing a controllable noise reduction zone in an embodiment of the present application. The active noise reduction device in the controllable noise reduction zone in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Fig. 9 The active noise reduction device with controllable noise reduction zone shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0129] like Fig. 9As shown, the active noise reduction device with controllable noise reduction zone may include a processing device 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the active noise reduction device with controllable noise reduction zone are also stored. The processing device 1001, ROM1002, and RAM1004 are connected to each other via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems may be connected to the I / O interface 1006: input devices 1007 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; storage devices 1003 including, for example, a magnetic tape, a hard disk, etc.; and communication devices 1009. The communication device 1009 may allow the active noise reduction device with controllable noise reduction zones to communicate wirelessly or wired with other devices to exchange data. Although the figure shows an active noise reduction device with controllable noise reduction zones of various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems may be implemented or have alternatively.

[0130] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0131] The active noise reduction device with controllable noise reduction zone provided by the present application adopts the active noise reduction method with controllable noise reduction zone in the above embodiment, which can solve the technical problem that the distance between the error microphone and the human ear is too large. Compared with the prior art, the beneficial effects of the active noise reduction device with controllable noise reduction zone provided by the present application are the same as the beneficial effects of the active noise reduction method with controllable noise reduction zone provided by the above embodiment, and other technical features in the active noise reduction device with controllable noise reduction zone are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0132] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0133] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0134] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, and the computer-readable program instructions are used to execute the active noise reduction method of the controllable noise reduction zone in the above-mentioned embodiment.

[0135] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, 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 this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0136] The computer-readable storage medium may be included in the active noise reduction device of the controllable noise reduction zone; or may exist independently without being assembled into the active noise reduction device of the controllable noise reduction zone.

[0137] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by the active noise reduction device of the controllable noise reduction zone, the active noise reduction device of the controllable noise reduction zone: identifies the movable error microphone in response to the adjustment error microphone signal to obtain the three-dimensional coordinates of the movable error microphone; determines the corresponding target space area according to the three-dimensional coordinates; and calls the active noise reduction strategy to perform noise reduction processing on the target space area.

[0138] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including 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 the case of 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., via the Internet using an Internet service provider).

[0139] 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 application. 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 alternative implementations, 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.

[0140] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0141] The readable storage medium provided by the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the active noise reduction method of the controllable noise reduction zone, and can solve the technical problem that the distance between the error microphone and the human ear is too large. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by the present application are the same as the beneficial effects of the active noise reduction method of the controllable noise reduction zone provided by the above embodiment, and will not be repeated here.

[0142] The present application also provides a computer program product, including a computer program, which implements the steps of the active noise reduction method with controllable noise reduction zone as described above when the computer program is executed by a processor.

[0143] The computer program product provided by the present application can solve the technical problem that the distance between the error microphone and the human ear is too large. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as the beneficial effects of the active noise reduction method with controllable noise reduction area provided by the above embodiment, which will not be repeated here.

[0144] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. An active noise reduction method with a controllable noise reduction zone, characterized in that: The method is applied to a vehicle, wherein a movable error microphone is provided on the vehicle, and the active noise reduction method of the controllable noise reduction zone comprises the following steps: In response to the adjustment error microphone signal, identifying the movable error microphone to obtain the three-dimensional coordinates of the movable error microphone; Determine a corresponding target space region according to the three-dimensional coordinates; An active noise reduction strategy is invoked to perform noise reduction processing on the target spatial area.

2. The active noise reduction method of the controllable noise reduction zone according to claim 1, characterized in that: The step of determining the corresponding target space area according to the three-dimensional coordinates includes: The three-dimensional coordinates of the movable error microphone and the three-dimensional coordinates of the spatial region are matched through a three-dimensional coordinate model to determine the corresponding target spatial region.

3. The active noise reduction method of the controllable noise reduction zone according to claim 2, characterized in that: The step of matching the three-dimensional coordinates of the movable error microphone with the three-dimensional coordinates of the spatial region through the three-dimensional coordinate model to determine the corresponding target spatial region comprises: Numbering the spatial regions respectively based on the three-dimensional coordinates of the spatial regions; determining, according to the three-dimensional coordinates of the movable error microphone, in the order of the numbers, whether the three-dimensional coordinates of the movable error microphone are within the three-dimensional coordinates of the space region; When the three-dimensional coordinates of the movable error microphone are not within the three-dimensional coordinates of the spatial region, matching is continued until the three-dimensional coordinates of the movable error microphone are within the three-dimensional coordinates of the spatial region, thereby determining the target spatial region.

4. The active noise reduction method of the controllable noise reduction zone according to claim 1, characterized in that: The step of invoking an active noise reduction algorithm to perform noise reduction processing on the target space area includes: Determining a corresponding target secondary pathway model according to the target spatial region; Based on the target secondary pathway model, a corresponding active noise reduction strategy is called to perform noise reduction processing on the target spatial area.

5. The active noise reduction method of the controllable noise reduction zone according to claim 2, characterized in that: Before the step of matching the three-dimensional coordinates of the movable error microphone with the three-dimensional coordinates of the spatial region through the three-dimensional coordinate model to determine the corresponding target spatial region, the step further includes: The length, width and height of the interior space of the vehicle are equally divided into preset lengths to obtain a preset number of space areas; Performing secondary pathway identification on the spatial regions respectively to obtain a preset number of secondary pathway models corresponding to the spatial regions; A three-dimensional coordinate model is established to identify the space region, and the three-dimensional coordinates of the space region are obtained to match the three-dimensional coordinates of the movable error microphone.

6. The active noise reduction method of the controllable noise reduction zone according to claim 5, characterized in that: The step of performing secondary path identification on the spatial regions respectively to obtain a preset number of secondary path models corresponding to the spatial regions comprises: Extract features from the spatial regions using a deep learning model to obtain features corresponding to each spatial region; The features are subjected to secondary pathway identification, and a preset number of secondary pathway models corresponding to the spatial region are established.

7. The active noise reduction method of any one of claims 1 to 6, characterized in that: Before the step of identifying the movable error microphone, the method further includes: In response to the error microphone adjustment signal, the electromagnet current is controlled to decrease until a signal indicating that the error microphone adjustment is completed is received, and then the electromagnet current is controlled to increase to complete the position adjustment of the movable error microphone.

8. An active noise reduction device with a controllable noise reduction zone, characterized in that: The device comprises: a data acquisition module, configured to identify the movable error microphone in response to the adjustment error microphone signal, and obtain the three-dimensional coordinates of the movable error microphone; An analysis module, used to determine a corresponding target space region according to the three-dimensional coordinates; The noise reduction module is used to call an active noise reduction strategy to perform noise reduction processing on the target space area.

9. An active noise reduction device with a controllable noise reduction zone, characterized in that: The device comprises: a memory, a processor, and an active noise reduction program of a controllable noise reduction zone stored in the memory and executable on the processor, wherein the active noise reduction program of the controllable noise reduction zone is configured to implement the steps of the active noise reduction method of the controllable noise reduction zone according to any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium stores an active noise reduction program for a controllable noise reduction zone, and when the active noise reduction program for a controllable noise reduction zone is executed by a processor, the steps of the active noise reduction method for a controllable noise reduction zone as claimed in any one of claims 1 to 7 are implemented.

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