CN114299904A - Path compensation function determination method and device, and active noise reduction method and device - Google Patents
Path compensation function determination method and device, and active noise reduction method and device Download PDFInfo
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- CN114299904A CN114299904A CN202111022944.5A CN202111022944A CN114299904A CN 114299904 A CN114299904 A CN 114299904A CN 202111022944 A CN202111022944 A CN 202111022944A CN 114299904 A CN114299904 A CN 114299904A
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Abstract
The application provides a path compensation function determination method, which is applied to an active noise reduction scene comprising a target noise reduction area moving relative to a monitoring microphone and a loudspeaker, and comprises the following steps: determining target noise reduction area position information corresponding to a target noise reduction area based on a pressure signal set acquired by a pressure sensor array arranged in a moving range of the target noise reduction area; determining a first path compensation function based on monitoring microphone position information corresponding to a monitoring microphone and target noise reduction area position information; and determining a second path compensation function based on the loudspeaker position information corresponding to the loudspeaker and the target noise reduction area position information. The position information of the target noise reduction area is acquired in real time through the pressure signal set acquired by the pressure sensor array in real time, so that the purpose of determining the path compensation function in real time is achieved, a basis can be provided for determining the noise reduction signal aiming at the target noise reduction area in real time, and the noise of the target noise reduction area is minimized.
Description
Technical Field
The present application relates to the field of active noise reduction technologies, and in particular, to a method and an apparatus for determining a path compensation function, a method and an apparatus for active noise reduction, an electronic device, and a computer-readable storage medium.
Background
In a feedback active noise reduction system, a secondary path transfer function needs to be predetermined to design noise reduction parameters of a feedback noise reduction filter so as to reduce noise of a target noise reduction region.
However, for a noise field scene, such as a vehicle cabin scene, the target noise reduction region usually moves relative to the feedback active noise reduction system, and the target noise reduction region and each electroacoustic path are unknown and not fixed, so that it is completely impossible to track the target noise reduction region in real time to adapt to the targeted optimal noise reduction.
Disclosure of Invention
In view of this, embodiments of the present application provide a method and an apparatus for determining a path compensation function, an active noise reduction method and an apparatus, an electronic device, and a computer-readable storage medium, so as to determine a path compensation function in real time based on a target noise reduction region that changes at any time, and provide a basis for determining an optimal noise reduction parameter for the target noise reduction region in real time.
According to an aspect of the present application, a method for determining a path compensation function provided by an embodiment of the present application is applied to an active noise reduction scene including a target noise reduction region moving relative to a monitoring microphone and a speaker, and the method includes: determining target noise reduction area position information corresponding to a target noise reduction area based on a pressure signal set acquired by a pressure sensor array arranged in a moving range of the target noise reduction area; determining a first path compensation function based on monitoring microphone position information corresponding to a monitoring microphone and target noise reduction area position information; and determining a second path compensation function based on the loudspeaker position information corresponding to the loudspeaker and the target noise reduction area position information.
In one embodiment, determining target noise reduction area position information corresponding to a target noise reduction area based on a pressure signal set collected by a pressure sensor array set in a moving range of the target noise reduction area comprises: determining a pressure source motion profile based on the set of pressure signals; and determining the position information of the target noise reduction area corresponding to the motion form of the pressure source based on the corresponding relation between the motion form of the pressure source and the position information of the target noise reduction area.
In one embodiment, determining the first path compensation function based on the position information of the monitoring microphone and the position information of the target noise reduction region corresponding to the monitoring microphone includes: determining preset target noise reduction region position information matched with the target noise reduction region position information based on a maximum matching degree algorithm; and determining a first path compensation function corresponding to the position information of the target noise reduction area based on the corresponding relation between the position information of the preset target noise reduction area and the preset first path compensation function, wherein the preset first path compensation function is determined based on the position information of the monitoring microphone and the position information of the preset target noise reduction area.
In one embodiment, determining the second path compensation function based on the speaker position information corresponding to the speaker and the target noise reduction region position information includes: determining preset target noise reduction region position information matched with the target noise reduction region position information based on a maximum matching degree algorithm; and determining a second path compensation function corresponding to the position information of the target noise reduction area based on the corresponding relation between the position information of the preset target noise reduction area and the preset second path compensation function, wherein the preset second path compensation function is determined based on the position information of the loudspeaker and the position information of the preset target noise reduction area.
In one embodiment, determining the first path compensation function based on the position information of the monitoring microphone and the position information of the target noise reduction area corresponding to each monitoring microphone in the monitoring microphone array includes: determining a first path compensation function by taking a coordinate corresponding to the position information of the monitoring microphone as a transfer starting point and a coordinate corresponding to the position information of the target noise reduction area as a transfer end point; and/or, wherein the determining the second path compensation function based on the speaker position information and the target noise reduction area position information corresponding to each speaker in the feedback active noise reduction system comprises: and determining a second path compensation function by taking the coordinate corresponding to the loudspeaker position information as a transfer starting point and the coordinate corresponding to the target noise reduction area position information as a transfer end point.
In one embodiment, according to a second aspect of embodiments of the present application, there is provided an active noise reduction method, including: determining a monitoring position noise signal corresponding to the monitoring position error signal based on the monitoring position error signal acquired by the monitoring microphone; determining a target noise reduction area noise signal corresponding to the monitoring position noise signal based on the monitoring position noise signal and the first path compensation function; determining a target noise reduction area error signal corresponding to the target noise reduction area noise signal based on the target noise reduction area noise signal and a second path compensation function, wherein the first path compensation function and/or the second path compensation function is determined based on the path compensation function determination method of the first aspect; determining a noise reduction parameter based on the target noise reduction region noise signal and the target noise reduction region error signal; and generating a noise reduction signal based on the noise signal of the target noise reduction region and the noise reduction parameter so as to reduce the noise of the target noise reduction region.
In one embodiment, according to a third aspect of embodiments of the present application, there is provided a path compensation function determination apparatus applied to an active noise reduction system including a target noise reduction region moving relative to a monitoring microphone and a speaker, the apparatus including: the first determining module is configured to determine target noise reduction area position information corresponding to a target noise reduction area based on a pressure signal set acquired by a pressure sensor array arranged in a moving range of the target noise reduction area; the second determining module is configured to determine a first path compensation function based on the position information of the monitoring microphone corresponding to the monitoring microphone and the position information of the target noise reduction area; and the third determining module is configured to determine a second path compensation function based on the speaker position information corresponding to the speaker and the target noise reduction area position information.
According to a fourth aspect of embodiments of the present application, there is provided an active noise reduction device, including: the fourth determination module is configured to determine a monitoring position noise signal corresponding to the monitoring position error signal based on the monitoring position error signal acquired by the monitoring microphone; a fifth determining module configured to determine a target noise reduction region noise signal corresponding to the monitoring position noise signal based on the monitoring position noise signal and the first path compensation function; a sixth determining module, configured to determine a target noise reduction area error signal corresponding to the target noise reduction area noise signal based on the target noise reduction area noise signal and a second path compensation function, where the first path compensation function and/or the second path compensation function are determined based on the path compensation function determining method of the first aspect; a seventh determining module configured to determine a noise reduction parameter based on the target noise reduction region noise signal and the target noise reduction region error signal; and the noise reduction module is configured to generate a noise reduction signal based on the noise reduction parameters so as to reduce the noise of the target noise reduction area.
According to a fifth aspect of embodiments of the present application, there is provided an electronic apparatus, including: a processor; and a memory having stored therein computer program instructions which, when executed by the processor, cause the processor to perform the path compensation function determination method as described above in the first aspect or the active noise reduction method as described above in the second aspect.
According to a sixth aspect of embodiments of the present application, there is provided a computer-readable storage medium having stored thereon computer program instructions which, when executed by a processor, cause the processor to perform a path compensation function determination method as in the first aspect above or an active noise reduction method as in the second aspect above.
The method for determining the path compensation function is applied to an active noise reduction scene comprising a target noise reduction area moving relative to a monitoring microphone and a loudspeaker, and is used for determining the position information of the target noise reduction area corresponding to the target noise reduction area based on a pressure signal set acquired by a pressure sensor array arranged in the moving range of the target noise reduction area, so that the real-time positioning of the target noise reduction area is realized, and determining a first path compensation function based on the position information of the monitoring microphone corresponding to the monitoring microphone and the position information of the target noise reduction area; and determining a second path compensation function based on the loudspeaker position information corresponding to the loudspeaker and the target noise reduction area position information, so that a basis can be provided for determining the noise reduction signal aiming at the target noise reduction area in real time, and the noise of the target noise reduction area is minimized.
Drawings
Fig. 1 is a schematic flow chart illustrating a method for determining a path compensation function according to an embodiment of the present disclosure.
Fig. 2 is a schematic flowchart illustrating a method for determining a path compensation function according to an embodiment of the present disclosure.
Fig. 3 is a schematic flowchart illustrating a method for determining a path compensation function according to an embodiment of the present disclosure.
Fig. 4 is a flowchart illustrating a method for determining a path compensation function according to an embodiment of the present application.
Fig. 5 is a flowchart illustrating a method for determining a path compensation function according to an embodiment of the present disclosure.
Fig. 6 is a schematic flowchart of an active noise reduction method according to an embodiment of the present application.
Fig. 7 is a schematic structural diagram of a path compensation function determining apparatus according to an embodiment of the present application.
Fig. 8 is a schematic structural diagram of a path compensation function determining apparatus according to an embodiment of the present application.
Fig. 9 is a schematic structural diagram of an active noise reduction device according to an embodiment of the present application.
Fig. 10 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Exemplary Path Compensation function determination method
Fig. 1 is a schematic flow chart illustrating a method for determining a path compensation function according to an embodiment of the present disclosure. The method for determining the path compensation function can be applied to an active noise reduction scene relative to a target noise reduction area for monitoring the movement of a microphone and a loudspeaker.
For example, for a cabin-type active noise reduction scenario, the target noise reduction region is the eardrum of the human ear, the head of the passenger is the pressure source, and the noise includes the background sound signal. Because the eardrum of the human ear can not be provided with the microphone, the monitoring microphone is arranged in the headrest of the vehicle seat, the ceiling of the vehicle cabin or the A column, the B column, the C column, the D column and other positions of the vehicle. An array of pressure sensors is provided on the vehicle seat headrest (i.e., the array of pressure sensors is disposed within the range of motion of the head) for acquiring a set of pressure signals.
When the head of the passenger rotates or the position of the passenger moves (i.e. the pressure source is in different motion states), the position of the eardrum of the human ear and the secondary path (the transmission path between the speaker and the eardrum of the human ear) are unknown and not fixed, so that the eardrum of the human ear cannot be tracked in real time to adapt to the targeted optimal noise reduction, and the target noise reduction area cannot be tracked in real time to adapt to the targeted optimal noise reduction.
Therefore, the embodiment of the application provides a path compensation function determination method, which can determine a path compensation function in real time based on a target noise reduction region which changes at any time, and provide a basis for determining a noise reduction signal for the target noise reduction region in real time. Specifically, as shown in fig. 1, the method for determining a path compensation function provided in the embodiment of the present application includes the following steps.
Step 101: and determining the position information of the target noise reduction region corresponding to the target noise reduction region based on a pressure signal set acquired by a pressure sensor array arranged in the moving range of the target noise reduction region.
Specifically, the movement of the pressure source causes the position of the target noise reduction system to change constantly, and meanwhile, the movement of the pressure source also causes the pressure signal set applied to the pressure sensor array to change constantly.
For example, for a vehicle cabin type scene, the head of a passenger is a pressure source, the eardrum of a human ear is a target noise reduction area, and the relative position of the eardrum of the human ear and a feedback active noise reduction system is changed due to different postures of the head of the passenger. The pressure sensor array is arranged on the headrest of the vehicle seat, and the head posture can be analyzed in real time through the pressure signal set acquired by the pressure sensor array in real time, so that the eardrum of the human ear can be positioned in real time.
Step 102: and determining a first path compensation function based on the position information of the monitoring microphone corresponding to the monitoring microphone and the position information of the target noise reduction area.
Specifically, the monitoring microphone is used for collecting a residual noise signal after noise reduction at the monitoring position, namely a monitoring position error signal. The first path compensation function is used for equivalently simulating a transmission path between a monitoring microphone and a target noise reduction area in the feedback active noise reduction system, so as to deduce a noise signal which is actually required to be reduced in the target noise reduction area but cannot be directly measured according to a noise signal of a monitoring position acquired by the monitoring microphone. After the position of the monitoring microphone and the position of the target noise reduction region are respectively determined, a first path compensation function can be determined.
Step 103: and determining a second path compensation function based on the loudspeaker position information corresponding to the loudspeaker and the target noise reduction area position information.
Specifically, the second path compensation function is used for equivalently simulating a transfer path between an input end of a loudspeaker and a target noise reduction area in the feedback active noise reduction system. After the position of the speaker and the position of the target noise reduction area are determined, a second path compensation function may be determined.
In the design of the active noise reduction system, the second path compensation function determined in real time is used as a secondary path transfer function of an active noise reduction scene, a target noise reduction area noise signal is derived according to a monitoring position error signal acquired by a monitoring microphone and the first path compensation function, and the optimal noise reduction parameter of a target noise reduction area which is actually time-varying and cannot be directly observed by the microphone can be obtained.
In the embodiment of the application, the path compensation function determination method is applied to an active noise reduction scene comprising a target noise reduction area moving relative to a monitoring microphone and a loudspeaker. The method comprises the steps of determining target noise reduction area position information corresponding to a target noise reduction area based on a pressure signal set collected by a pressure sensor array arranged in a moving range of the target noise reduction area, determining a first path compensation function based on monitoring microphone position information corresponding to a monitoring microphone and the target noise reduction area position information, determining a second path compensation function based on loudspeaker position information corresponding to a loudspeaker and the target noise reduction area position information, and providing a basis for determining noise reduction signals aiming at the target noise reduction area in real time, so that noise of the target noise reduction area is minimized.
Fig. 2 is a schematic flowchart illustrating a method for determining a path compensation function according to an embodiment of the present disclosure. As shown in fig. 2, the step of determining the position information of the target noise reduction region corresponding to the target noise reduction region based on the pressure signal set collected by the pressure sensor array set in the moving range of the target noise reduction region includes the following steps.
Step 201: based on the set of pressure signals, a pressure source motion profile is determined.
Specifically, the motion profile of the pressure source changes the position of the target noise reduction system while also changing the set of pressure signals applied to the array of pressure sensors. Different pressure source motion profiles cause different sets of pressure signals to be collected by the array of pressure sensors. And presetting a corresponding relation between the pressure source motion form and the pressure signal set, and determining the pressure source motion form corresponding to the pressure signal set acquired by the pressure sensor array in real time based on the corresponding relation.
For example, for a passenger in a vehicle cabin, the pressure sensor array is disposed in a headrest, the head of the passenger is a pressure source, and when the head of the passenger is in a posture of turning left and right, extending forward or leaning back against the headrest, and the like, sets of pressure signals collected by the pressure sensor array are different. And determining the head posture of the passenger in real time based on the pressure signal set acquired by the pressure sensor array in real time according to the corresponding relation between the preset pressure signal set and the head posture of the passenger.
Step 202: and determining the position information of the target noise reduction area corresponding to the motion form of the pressure source based on the corresponding relation between the motion form of the pressure source and the position information of the target noise reduction area.
Specifically, different pressure source forms correspond to different position information of the target noise reduction area, and real-time positioning of the target noise reduction area is achieved according to the pressure source motion form obtained in real time based on the corresponding relation between the pressure source motion form preset in advance and the position information of the target noise reduction area.
For example, different head postures correspond to different eardrum positions of the human ear, and the position of the eardrum of the human ear is determined according to the preset corresponding relation between the head postures and the positions of the eardrums of the human ear.
In the embodiment of the application, the pressure source motion form corresponding to the pressure signal set acquired by the pressure sensor array in real time is determined by presetting the corresponding relation between the pressure source motion form and the pressure signal set, and the target noise reduction area position information corresponding to the pressure source motion form is determined according to the pressure source motion form obtained in real time based on the corresponding relation between the pressure source motion form preset in advance and the target noise reduction area position information, so that the real-time positioning of the target noise reduction area is realized.
Fig. 3 is a schematic flowchart illustrating a method for determining a path compensation function according to an embodiment of the present disclosure. As shown in fig. 3, the step of determining the first path compensation function based on the position information of the monitoring microphone corresponding to the monitoring microphone and the position information of the target noise reduction region includes the following steps.
Step 301: and determining preset target noise reduction region position information matched with the target noise reduction region position information based on a maximum matching degree algorithm.
Step 302: and determining a first path compensation function corresponding to the position information of the target noise reduction area based on the corresponding relation between the preset position information of the target noise reduction area and the preset first path compensation function.
Illustratively, the preset first path compensation function is determined based on the monitoring microphone position information and the preset target noise reduction region position information.
Specifically, positions where a plurality of target noise reduction regions are likely to be located, that is, preset target noise reduction region position information, are preset. For each preset target noise reduction area position information in the preset target noise reduction area position information, a preset first path compensation function is obtained based on the preset target noise reduction area position information and the monitoring microphone position information, and therefore the preset first path compensation functions corresponding to the preset target noise reduction area position information are obtained.
The method comprises the steps of matching target noise reduction area position information obtained in real time with a plurality of preset target noise reduction area positions, determining preset target noise reduction area position information matched with current target noise reduction area information by searching for the maximum matching degree based on a maximum matching degree algorithm, and determining a first path compensation function corresponding to the target noise reduction area position information according to the corresponding relation between the preset target noise reduction area position information and a preset first path compensation function.
For example, a preset first compensation path function corresponding to some head postures (i.e. preset ear drum positions) is preset, and the first path compensation function corresponding to the acquired head postures is determined by matching the acquired head postures with the preset head postures.
In the embodiment of the application, based on a maximum matching degree algorithm, the preset target noise reduction region position information matched with the target noise reduction region position information is determined, the first path compensation function corresponding to the target noise reduction region position information is determined based on the corresponding relation between the preset target noise reduction region position information and the preset first path compensation function, the first path compensation function corresponding to the target noise reduction region can be determined through matching, an acoustic path does not need to be established in real time to determine the first path compensation function, and the calculation amount can be reduced.
Fig. 4 is a flowchart illustrating a method for determining a path compensation function according to an embodiment of the present application. As shown in fig. 4, the step of determining the second path compensation function based on the speaker position information corresponding to the speaker and the target noise reduction region position information includes the following steps.
Step 401: and determining preset target noise reduction region position information matched with the target noise reduction region position information based on a maximum matching degree algorithm.
Step 402: and determining a second path compensation function corresponding to the position information of the target noise reduction area based on the corresponding relation between the preset position information of the target noise reduction area and the preset second path compensation function.
Illustratively, the preset second path compensation function is determined based on the speaker position information and the preset target noise reduction region position information.
Specifically, positions where a plurality of target noise reduction regions are likely to be located, that is, preset target noise reduction region position information, are preset. And for each preset target noise reduction area position information in the preset target noise reduction area position information, acquiring a preset second path compensation function based on the preset target noise reduction area position information and the loudspeaker position information, thereby acquiring the preset second path compensation functions corresponding to the preset target noise reduction area position information.
The method comprises the steps of matching target noise reduction area position information obtained in real time with a plurality of preset target noise reduction area positions, determining preset target noise reduction area position information matched with current target noise reduction area information by searching for the maximum matching degree based on a maximum matching degree algorithm, and determining a second path compensation function corresponding to the target noise reduction area position information according to the corresponding relation between the preset target noise reduction area position information and a preset second path compensation function.
For example, a preset second compensation path function corresponding to some head postures (i.e. preset eardrum positions of human ears) is preset, and the second path compensation function corresponding to the acquired head postures is determined by matching the acquired head postures with the preset head postures.
In the embodiment of the application, based on a maximum matching degree algorithm, the preset target noise reduction area position information matched with the target noise reduction area position information is determined, the second path compensation function corresponding to the target noise reduction area position information is determined based on the corresponding relation between the preset target noise reduction area position information and the preset second path compensation function, the second path compensation function corresponding to the target noise reduction area can be determined through matching, an acoustic path does not need to be established in real time to determine the second path compensation function, and the calculation amount can be reduced.
Fig. 5 is a flowchart illustrating a method for determining a path compensation function according to an embodiment of the present disclosure. As shown in fig. 5, the step of determining the first path compensation function based on the position information of the monitoring microphone corresponding to each monitoring microphone in the monitoring microphone array and the position information of the target noise reduction area includes the following steps.
Step 501: and determining a first path compensation function by taking the coordinate corresponding to the position information of the monitoring microphone as a transfer starting point and the coordinate corresponding to the position information of the target noise reduction area as a transfer end point.
Specifically, for the feedback active noise reduction system, a coordinate corresponding to the position information of the monitoring microphone is taken as a transfer starting point, a coordinate corresponding to the position information of the target noise reduction region is taken as a transfer end point, a noise signal is spatially transferred between the monitoring microphone and the target noise reduction region, and a corresponding first path compensation function can be determined based on a point-to-point propagation mode.
The method comprises the following steps of determining a second path compensation function based on the position information of the loudspeaker corresponding to the loudspeaker and the position information of the target noise reduction area.
Step 502: and determining a second path compensation function by taking the coordinate corresponding to the loudspeaker position information as a transfer starting point and the coordinate corresponding to the target noise reduction area position information as a transfer end point.
Specifically, for each speaker in the speaker array in the feedback active noise reduction system, the coordinates corresponding to the speaker position information are used as a transfer starting point, the coordinates corresponding to the target noise reduction area position information are used as a transfer end point, and a starting point and an end point corresponding to a second compensation path, that is, a starting point and an end point of a secondary path corresponding to a noise reduction sound source (secondary source) in an active noise reduction scene are determined, so that a second path compensation function, that is, a secondary path transfer function corresponding to the speaker is determined.
In the embodiment of the application, the purpose of determining the first path compensation function is achieved by utilizing the coordinate information in the position information of the target noise reduction area and the coordinate information in the position information of the monitoring microphone, which are acquired in real time. And the purpose of determining the second path compensation function is realized by utilizing the coordinate information in the position information of the target noise reduction area and the coordinate information in the position information of the loudspeaker, which are acquired in real time.
Considering that in a feedback active noise reduction system, a secondary path transfer function needs to be predetermined to design noise reduction parameters of a feedback noise reduction filter so as to reduce noise of a target noise reduction area, however, the position where a microphone is actually arranged often has to deviate from a real noise reduction area to be reduced, so that the secondary path transfer function is unknown and unfixed, and an optimal noise reduction parameter for the target noise reduction area cannot be determined. Based on this, the method for determining a path compensation function provided in the embodiment of the present application locates a target noise reduction area in real time by locating a motion state of a pressure source in real time, so as to determine a first path compensation function and a second path compensation function, and uses the second path compensation function determined in real time as a secondary path transfer function of an active noise reduction scene, and derives a noise signal of the target noise reduction area according to a monitored position error signal acquired by a monitoring microphone and the first path compensation function, so as to obtain an optimal noise reduction parameter for the target noise reduction area which is actually, time-varying and which cannot be directly observed by the microphone.
Exemplary active noise reduction method
Fig. 6 is a schematic flowchart of an active noise reduction method according to an embodiment of the present application. As shown in fig. 6, the active noise reduction method includes the following steps.
Step 601: and determining a monitoring position noise signal corresponding to the monitoring position error signal based on the monitoring position error signal acquired by the monitoring microphone.
Specifically, the monitor position error signal is a noise signal remaining after noise reduction at the monitor position. And forming a monitoring position error signal after the monitoring position noise signal is superposed with the monitoring position noise reduction signal. The monitoring position noise reduction signal is eliminated by the adder after the monitoring position error signal is collected by the monitoring microphone, and a monitoring position noise signal corresponding to the monitoring position error signal can be obtained.
Illustratively, the monitor position noise reduction signal is determined based on the initial noise reduction signal and a transfer function between the speaker input and the monitor position.
Step 602: and determining a target noise reduction area noise signal corresponding to the monitoring position noise signal based on the monitoring position noise signal and the first path compensation function.
Specifically, the monitoring position noise signal is a noise signal transmitted to the monitoring position by the noise signal, and the target noise reduction region noise signal is a noise signal transmitted to the target noise reduction region by the noise signal. The noise signal is transmitted in the space between the monitoring position and the target noise reduction area. Because the first path compensation function is used for equivalently simulating a transmission path between the monitoring position and the target noise reduction area, the noise signal of the monitoring position is deduced by using the first path compensation function, and the noise signal of the target noise reduction area can be determined.
Exemplarily, the first path compensation function is determined based on the path compensation function determination method of any of the embodiments, and the positioning of the target noise reduction region is realized through the pressure signal set acquired in real time, so that the first path compensation function is determined in real time, and the noise signal of the target noise reduction region can be determined by deriving the monitoring position noise signal through the first path compensation function.
Step 603: and determining a target noise reduction area error signal corresponding to the target noise reduction area noise signal based on the target noise reduction area noise signal and the second path compensation function.
Specifically, the target noise reduction region error signal is a residual noise signal after noise reduction of the target noise reduction region, and essentially, the target noise reduction region noise signal and the target noise reduction region noise reduction signal are superimposed to form the target noise reduction region error signal. In step 602, the noise signal of the target noise reduction area is already obtained, and since the second path compensation function is used for the transfer path between the input end of the equivalent analog speaker and the target noise reduction area, that is, the second path compensation function is used for the secondary path between the equivalent analog speaker and the target noise reduction area, the noise signal of the target noise reduction area can be obtained according to the initial noise reduction signal and the second path compensation function. And then, the noise signal of the target noise reduction area and the noise reduction signal of the target noise reduction area are superposed, so that an error signal of the target noise reduction area can be obtained.
Exemplarily, the second path compensation function is determined based on the path compensation function determination method of any of the above embodiments, and the positioning of the target noise reduction region is realized through the pressure signal set collected in real time, so as to determine the second path compensation function in real time, that is, the secondary path transfer function of the feedback active noise reduction system.
Step 604: and determining noise reduction parameters based on the target noise reduction region noise signal and the target noise reduction region error signal.
Specifically, a target noise reduction region noise signal and a target noise reduction region error signal are input into an adaptive module, the adaptive module adjusts an initial noise reduction parameter of a feedback noise reduction filter based on the target noise reduction region noise signal and the target noise reduction region error signal, noise reduction is performed on a target noise reduction region based on the adjusted noise reduction parameter until the adjusted target noise reduction region error signal meets a minimization condition, and an optimal active noise reduction parameter is determined.
Step 605: and generating a noise reduction signal based on the noise signal of the target noise reduction region and the noise reduction parameter so as to reduce the noise of the target noise reduction region.
Specifically, a noise reduction signal is generated based on the noise reduction parameters for the target noise reduction region to reduce noise in the target noise reduction region, thereby minimizing noise in the target noise reduction region.
In the embodiment of the application, a noise signal of a monitoring position at the position of a monitoring microphone is determined based on an acoustic signal collected by the monitoring microphone, a noise signal of a target noise reduction area is determined based on the noise signal of the monitoring position and a first path compensation function, a noise reduction parameter is determined based on the noise signal of the target noise reduction area and a second path compensation function, a noise reduction signal is generated based on the noise signal of the target noise reduction area and a noise reduction area error signal, so that noise reduction is performed on the target noise reduction area, and noise minimization of the target noise reduction area is realized in real time.
Exemplary Path Compensation function determination apparatus
Fig. 7 is a schematic structural diagram of a path compensation function determining apparatus according to an embodiment of the present application. The path compensation function determination apparatus mentioned in the present application is applied to an active noise reduction system including a target noise reduction region that moves relative to a monitor microphone and a speaker.
As shown in fig. 7, the path compensation function determining apparatus 100 includes: a first determining module 101, a second determining module 102 and a third determining module 103.
The first determining module 101 is configured to determine target noise reduction region position information corresponding to a target noise reduction region based on a pressure signal set collected by a pressure sensor array set in a moving range of the target noise reduction region. The second determining module 102 is configured to determine the first path compensation function based on the position information of the monitoring microphone corresponding to the monitoring microphone and the position information of the target noise reduction region. The third determining module 103 is configured to determine the second path compensation function based on the speaker position information corresponding to the speaker and the target noise reduction region position information.
In the embodiment of the present application, the path compensation function determining apparatus 100 is applied to an active noise reduction scene including a target noise reduction region moving relative to a monitoring microphone and a speaker. The first determining module 101 determines target noise reduction area position information corresponding to a target noise reduction area based on a pressure signal set acquired by a pressure sensor array arranged in a moving range of the target noise reduction area, the second determining module 102 determines a first path compensation function based on monitoring microphone position information corresponding to a monitoring microphone and the target noise reduction area position information, and the third determining module 103 determines a second path compensation function based on speaker position information corresponding to a speaker and the target noise reduction area position information. Therefore, when the scene faces the noise field, the path compensation function can be determined in real time based on the target noise reduction area which changes at any time, and then a basis is provided for determining the noise reduction signal aiming at the target noise reduction area in real time, so that the noise of the target noise reduction area is minimized.
Fig. 8 is a schematic structural diagram of a path compensation function determining apparatus according to an embodiment of the present application. As shown in fig. 8, the first determining module 101 further includes: a motion shape determination unit 1011 and a target noise reduction region position information determination unit 1012.
The motion profile determination unit 1011 is configured to determine a pressure source motion profile based on the set of pressure signals. The target noise reduction region position information determination unit 1012 is configured to determine target noise reduction region position information corresponding to the pressure source motion pattern based on the correspondence between the pressure source motion pattern and the target noise reduction region position information.
In one embodiment, as shown in fig. 8, the second determining module 102 further comprises: a first determination unit 1021 and a first path compensation function unit 1022.
The first determination unit 1021 is configured to determine preset target noise reduction region position information that matches the target noise reduction region position information based on a maximum matching degree algorithm. The first path compensation function unit 1022 is configured to determine a first path compensation function corresponding to the position information of the target noise reduction region based on the corresponding relationship between the preset position information of the target noise reduction region and the preset first path compensation function.
Illustratively, the preset first path compensation function is determined based on the monitoring microphone position information and the preset target noise reduction region position information.
In one embodiment, as shown in fig. 8, the third determining module 103 further comprises: a second determination unit 1031, and a second path compensation function unit 1032.
The second determining unit 1031 is configured to determine preset target noise reduction region position information matched with the target noise reduction region position information based on a maximum matching degree algorithm. The second path compensation function unit 1032 is configured to determine a second path compensation function corresponding to the target noise reduction area position information based on a corresponding relationship between the preset target noise reduction area position information and the preset second path compensation function.
Illustratively, the preset second path compensation function is determined based on the speaker position information and the preset target noise reduction region position information.
In one embodiment, the first path compensation function unit 1022 is further configured to determine the first path compensation function by using the coordinate corresponding to the position information of the monitoring microphone as a transfer starting point and the coordinate corresponding to the position information of the target noise reduction region as a transfer end point.
In one embodiment, the second path compensation function unit 1032 is further configured to determine the second path compensation function by using the coordinates corresponding to the speaker position information as a transfer start point and the coordinates corresponding to the target noise reduction region position information as a transfer end point.
The implementation process of the function and the action of each module in the path compensation function determining apparatus is specifically detailed in the implementation process of the corresponding step in the path compensation function determining method, and is not described herein again.
Exemplary active noise reduction device
Fig. 9 is a schematic structural diagram of an active noise reduction device according to an embodiment of the present application. As shown in fig. 9, the active noise reduction device 200 includes: a fourth determination module 201, a fifth determination module 202, a sixth determination module 203, a seventh determination module 204, and a noise reduction module 205.
The fourth determining module 201 is configured to determine a monitored position noise signal corresponding to the monitored position error signal based on the monitored position error signal collected by the monitoring microphone. The fifth determining module 202 is configured to determine a target noise reduction region noise signal corresponding to the monitored position noise signal according to the monitored position noise signal and the first path compensation function. The sixth determining module 203 is configured to determine a target noise reduction area error signal corresponding to the target noise reduction area noise signal based on the target noise reduction area noise signal and a second path compensation function, where the first path compensation function and/or the second path compensation function are determined based on the path compensation function determining method of any of the embodiments. The seventh determination module 204 is configured to determine the noise reduction parameters based on the target noise reduction region noise signal and the target noise reduction region error signal. The noise reduction module 205 is configured to generate a noise reduction signal based on the noise reduction parameters to reduce the noise of the target noise reduction region.
In this embodiment of the application, the fourth determining module 201 determines a noise signal at a monitoring position of a monitoring microphone based on an acoustic signal collected by the monitoring microphone, the fifth determining module 202 determines a noise signal in a target noise reduction region based on the noise signal at the monitoring position and a first path compensation function, the sixth determining module 203 determines a noise signal in the target noise reduction region based on the noise signal in the target noise reduction region and a second path compensation function, the seventh determining module 204 determines a noise reduction parameter based on the noise signal in the target noise reduction region and an error signal in the target noise reduction region, and the noise reducing module 205 generates a noise reduction signal based on the noise signal in the target noise reduction region and the noise reduction parameter to reduce noise in the target noise reduction region, thereby minimizing noise in the target noise reduction region.
The implementation process of the function and the effect of each module in the active noise reduction device is specifically described in the implementation process of the corresponding step in the active noise reduction method, and is not described herein again.
Exemplary electronic device
Fig. 10 is a schematic structural diagram of an electronic device according to an embodiment of the present application. As shown in fig. 10, the electronic device 300 includes one or more processors 310 and memory 320.
The processor 310 may be a Central Processing Unit (CPU) or other form of processing unit having data processing capabilities and/or instruction execution capabilities, and may control other components in the electronic device 300 to perform desired functions.
Memory 320 may include one or more computer program products that may include various forms of computer-readable storage media, such as volatile memory and/or non-volatile memory. The volatile memory may include, for example, Random Access Memory (RAM), cache memory (cache), and/or the like. The non-volatile memory may include, for example, Read Only Memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium and executed by processor 310 to implement the path compensation function determination method or the active noise reduction method of the various embodiments of the present application described above and/or other desired functions.
In one example, the electronic device 300 may further include: an input device 330 and an output device 340, which are interconnected by a bus system and/or other form of connection mechanism (not shown).
Of course, for simplicity, only some of the components of the electronic device 300 relevant to the present application are shown in fig. 10, and components such as buses, input/output interfaces, and the like are omitted. In addition, electronic device 300 may include any other suitable components depending on the particular application.
Exemplary computer program product and computer-readable storage Medium
In addition to the above-described methods and apparatus, embodiments of the present application may also be a computer program product comprising computer program instructions that, when executed by a processor, cause the processor to perform the steps in the path compensation function determination methods provided according to the various embodiments of the present application described in the above-mentioned "exemplary path compensation function determination methods" section of this specification, or the steps in the active noise reduction methods provided according to the various embodiments of the present application described in the above-mentioned "exemplary active noise reduction methods" section.
The computer program product may write program code for carrying out operations for embodiments of the present application in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server.
Furthermore, embodiments of the present application may also be a computer-readable storage medium having stored thereon computer program instructions that, when executed by a processor, cause the processor to perform the steps in the path compensation function determination method provided according to the various embodiments of the present application described in the "exemplary path compensation function determination method" section above or the steps in the active noise reduction method provided according to the various embodiments of the present application described in the "exemplary active noise reduction method" section above.
The computer-readable storage medium may take any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may include, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable 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 disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
It should be noted that the above listed embodiments are only specific examples of the present application, and obviously, the present application is not limited to the above embodiments, and many similar variations exist. All modifications which would occur to one skilled in the art and which are, therefore, directly derivable or suggested by the disclosure herein are to be included within the scope of the present application.
It should be understood that the terms first, second, etc. used in the embodiments of the present application are only used for clearly describing the technical solutions of the embodiments of the present application, and are not used to limit the protection scope of the present application.
The above description is only for the preferred embodiment of the present application, and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A method for determining a path compensation function for use in an active noise reduction scenario including a target noise reduction region moving relative to a monitor microphone and speaker, the method comprising:
determining target noise reduction region position information corresponding to the target noise reduction region based on a pressure signal set acquired by a pressure sensor array arranged in the moving range of the target noise reduction region;
determining a first path compensation function based on the position information of the monitoring microphone corresponding to the monitoring microphone and the position information of the target noise reduction area;
and determining a second path compensation function based on the loudspeaker position information corresponding to the loudspeaker and the target noise reduction area position information.
2. The method for determining the path compensation function according to claim 1, wherein the determining the position information of the target noise reduction region corresponding to the target noise reduction region based on the pressure signal set collected by the pressure sensor array set in the moving range of the target noise reduction region comprises:
determining a pressure source motion profile based on the set of pressure signals;
and determining target noise reduction area position information corresponding to the pressure source motion form based on the corresponding relation between the pressure source motion form and the target noise reduction area position information.
3. The method according to claim 1 or 2, wherein the determining a first path compensation function based on the position information of the monitoring microphone corresponding to the monitoring microphone and the position information of the target noise reduction region comprises:
determining preset target noise reduction region position information matched with the target noise reduction region position information based on a maximum matching degree algorithm;
and determining a first path compensation function corresponding to the position information of the target noise reduction region based on the corresponding relation between the position information of the preset target noise reduction region and the preset first path compensation function, wherein the preset first path compensation function is determined based on the position information of the monitoring microphone and the position information of the preset target noise reduction region.
4. The method according to claim 1 or 2, wherein the determining a second path compensation function based on the speaker position information corresponding to the speaker and the target noise reduction region position information comprises:
determining preset target noise reduction region position information matched with the target noise reduction region position information based on a maximum matching degree algorithm;
and determining a second path compensation function corresponding to the position information of the target noise reduction area based on the corresponding relation between the position information of the preset target noise reduction area and the preset second path compensation function, wherein the preset second path compensation function is determined based on the position information of the loudspeaker and the position information of the preset target noise reduction area.
5. The method according to claim 1 or 2, wherein the determining a first path compensation function based on the position information of the monitoring microphone corresponding to the monitoring microphone and the position information of the target noise reduction region comprises:
determining the first path compensation function by taking the coordinate corresponding to the position information of the monitoring microphone as a transfer starting point and the coordinate corresponding to the position information of the target noise reduction area as a transfer end point;
and/or the presence of a gas in the gas,
wherein the determining a second path compensation function based on the speaker position information corresponding to the speaker and the target denoising area position information includes:
and determining the second path compensation function by taking the coordinate corresponding to the loudspeaker position information as a transfer starting point and the coordinate corresponding to the target noise reduction area position information as a transfer end point.
6. An active noise reduction method, comprising:
determining a monitoring position noise signal corresponding to a monitoring position error signal based on the monitoring position error signal acquired by a monitoring microphone;
determining a target noise reduction area noise signal corresponding to the monitoring position noise signal based on the monitoring position noise signal and a first path compensation function;
determining a target noise reduction area error signal corresponding to the target noise reduction area noise signal based on the target noise reduction area noise signal and a second path compensation function, wherein the first path compensation function and/or the second path compensation function is determined based on the path compensation function determination method of any one of claims 1 to 5;
determining a noise reduction parameter based on the target noise reduction region noise signal and the target noise reduction region error signal;
and generating a noise reduction signal based on the target noise reduction region noise signal and the noise reduction parameter so as to reduce the noise of the target noise reduction region.
7. A compensation path determining apparatus for use in an active noise reduction system including a target noise reduction region that moves relative to a monitor microphone and a speaker, the apparatus comprising:
the first determining module is configured to determine target noise reduction area position information corresponding to the target noise reduction area based on a pressure signal set acquired by a pressure sensor array arranged in a moving range of the target noise reduction area;
a second determining module configured to determine a first path compensation function based on the position information of the monitoring microphone corresponding to the monitoring microphone and the position information of the target noise reduction region;
and the third determining module is configured to determine a second path compensation function based on the speaker position information corresponding to the speaker and the target noise reduction area position information.
8. An active noise reduction device, comprising:
the fourth determination module is configured to determine a monitoring position noise signal corresponding to the monitoring position error signal based on the monitoring position error signal acquired by the monitoring microphone;
a fifth determining module, configured to determine a target noise reduction region noise signal corresponding to the monitoring position noise signal based on the monitoring position noise signal and a first path compensation function;
a sixth determining module, configured to determine a target noise reduction area error signal corresponding to the target noise reduction area noise signal based on the target noise reduction area noise signal and a second path compensation function, wherein the first path compensation function and/or the second path compensation function is determined based on the path compensation function determining method of any one of claims 1 to 6;
a seventh determining module configured to determine a noise reduction parameter based on the target noise reduction region noise signal and the target noise reduction region error signal;
and the noise reduction module is configured to generate a noise reduction signal based on the noise reduction parameters so as to reduce the noise of the target noise reduction region.
9. An electronic device, comprising:
a processor; and
memory having stored therein computer program instructions which, when executed by the processor, cause the processor to perform the method of any of claims 1 to 6.
10. A computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, cause the processor to perform the method of any of claims 1 to 6.
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