CN112435682A - Vehicle noise reduction system, method and device, vehicle and storage medium - Google Patents
Vehicle noise reduction system, method and device, vehicle and storage medium Download PDFInfo
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Abstract
The embodiment of the application discloses a vehicle noise reduction system, a method, a device, a vehicle and a storage medium, wherein the vehicle noise reduction system comprises a microphone module arranged outside the vehicle and used for receiving sound and generating an original audio signal based on the sound; the audio processing module is connected with the microphone module and is used for carrying out noise reduction processing on the original audio signal to obtain a target audio signal; and the playing module is arranged in a target area in the vehicle and used for converting the target audio signal into a sound analog signal and playing the sound analog signal so as to transmit the sound representing the sound analog signal to the target area. The vehicle noise reduction system can reduce noise of sound outside the vehicle, so that users in a target area can hear the outside sound, and is particularly suitable for vehicles with strong sound insulation capability, so that the sound received by the users outside the target area can be effectively reduced, and a quiet riding environment is provided for the users outside the target area.
Description
Technical Field
The present application relates to the field of vehicle noise reduction technologies, and in particular, to a vehicle noise reduction system, method, device, vehicle, and storage medium.
Background
In recent years, with the development of vehicle technology, the popularity of vehicles has increased, and the demands of consumers on vehicles have increased. For example, in order to improve the vehicle using experience of consumers, the silencing effect of vehicles in the market is better and better. At present, the existing noise reduction method for vehicles generally adopts a passive noise reduction method (for example, a sound insulation layer is arranged on the vehicle) to reduce the noise generated in the vehicle, although the method can achieve a good noise reduction effect, the implementation of the method can easily eliminate the outside sound which is useful for the personnel in the vehicle, is not beneficial to the driver to know the driving environment, and has certain potential safety hazard.
Disclosure of Invention
In view of the above problems, the present application provides a vehicle noise reduction system, method, device, vehicle and storage medium to solve one of the above problems.
In a first aspect, an embodiment of the present application provides a vehicle noise reduction system, including: the system comprises a microphone module arranged outside the vehicle, an audio processing module connected with the microphone module and a playing module arranged in a target area inside the vehicle. The microphone module is used for receiving sound and generating an original audio signal based on the sound. The audio processing module is used for carrying out noise reduction processing on the original audio signal to obtain a target audio signal. The playing module is used for converting the target audio signal into a sound analog signal and playing the sound analog signal, so that the sound representing the sound analog signal is transmitted to the target area.
In a second aspect, an embodiment of the present application provides a vehicle noise reduction method, including: acquiring an original audio signal generated by a microphone module disposed outside a vehicle; carrying out noise reduction processing on the original audio signal to obtain a target audio signal; and converting the target audio signal into a sound analog signal, and controlling a playing module arranged in a target area in the vehicle to play the sound analog signal so as to transmit the sound representing the sound analog signal to the target area.
In a third aspect, an embodiment of the present application provides a vehicle noise reduction device, which includes a signal acquisition module, an audio signal acquisition module, and an audio signal playing module. The signal acquisition module is used for acquiring an original audio signal generated by a microphone module arranged outside the vehicle. The audio signal acquisition module is used for carrying out noise reduction processing on the original audio signal to obtain a target audio signal. And the audio signal playing module is used for converting the target audio signal into a sound analog signal and controlling the playing module arranged in the target area in the vehicle to play the sound analog signal so as to transmit the sound representing the sound analog signal to the target area.
In a fourth aspect, an embodiment of the present application provides a vehicle including the above vehicle noise reduction system, the vehicle further including: one or more processors; a memory; one or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the one or more processors, the one or more programs configured to perform the steps of the vehicle noise reduction method described above.
In a fifth aspect, embodiments of the present application provide a computer-readable storage medium, where a computer program is stored, and the computer program is executed by a processor to implement the steps of the vehicle noise reduction method.
Compared with the prior art, in the scheme provided by the application, by adopting the vehicle noise reduction system comprising the microphone module, the audio processing module and the playing module, noise reduction processing can be performed on sound outside the vehicle, the noise reduced sound is purposefully reserved, the noise reduced sound is played, and the sound is transmitted to the target area, so that a user in the target area can hear the sound outside.
These and other aspects of the present application will be more readily apparent from the following description of the embodiments.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a block diagram illustrating a noise reduction system for a vehicle according to an embodiment of the present disclosure.
FIG. 2 is a schematic block diagram illustrating another noise reduction system for a vehicle according to an embodiment of the present disclosure.
Fig. 3 shows a schematic view of the position of a microphone unit in the noise reduction system of the vehicle shown in fig. 2.
Fig. 4 is a schematic diagram illustrating a position of a microphone unit relative to a reference position in the noise reduction system for a vehicle according to the present embodiment.
Fig. 5 is a schematic diagram illustrating a position of a play unit relative to a target area in the noise reduction system for a vehicle according to the present embodiment.
Fig. 6 is a schematic diagram illustrating a position of the play unit applied to the headrest in the noise reduction system for a vehicle according to the embodiment.
FIG. 7 shows a schematic flow chart of a vehicle noise reduction method according to an embodiment of the present application.
Fig. 8 shows a schematic flow chart of acquiring a target audio signal in the method shown in fig. 7.
Fig. 9 shows a schematic flow chart of acquiring a target audio signal in the method shown in fig. 8.
FIG. 10 is another schematic flow chart illustrating a vehicle noise reduction method according to an embodiment of the present disclosure.
Fig. 11 shows a functional block diagram of a vehicle noise reduction device according to an embodiment of the present application.
Fig. 12 shows a functional block diagram of a vehicle according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, 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.
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 some, but not all, embodiments of the present application. 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.
In order to clearly explain the scheme of the present application, some terms are explained below.
A vehicle control system: a system for controlling the operating state of the vehicle, for example, an ECU (Electronic Control Unit);
a microphone module: means for receiving sound external to the vehicle;
a playing module: means for playing a sound characterized by a target audio signal.
With the development of the automobile industry, particularly on high-grade automobiles, people in automobiles have higher requirements on driving comfort, and particularly for the noise of the automobiles and the noise outside the automobiles, the noise is an important component of automobile experience. Most high-end vehicles are mainly characterized in that sound absorption cotton and the like are attached to the vehicle body design through an active noise reduction algorithm and a passive noise reduction algorithm. For passive noise reduction, user experience in the vehicle can be guaranteed through better materials, but useful noise outside the vehicle, such as horn sound, distress sound, special vehicle alarm sound and the like, can be reduced simultaneously, and hidden dangers are brought to driving safety.
In order to be able to solve the above-described problems, the present inventors have made research and development efforts to study how to enable a target user in a vehicle to receive sound outside the vehicle. Based on this, the inventor proposes a vehicle noise reduction system of the present application, which includes a microphone module disposed outside the vehicle, an audio processing module connected to the microphone module, and a playback module disposed in a target area inside the vehicle. The microphone module is used for receiving sound and generating an original audio signal based on the sound. The audio processing module is used for carrying out noise reduction processing on the original audio signal to obtain a target audio signal. The playing module is used for converting the target audio signal into a sound analog signal and playing the sound analog signal, so that the sound representing the sound analog signal is transmitted to the target area. Through the implementation of the application, by adopting the vehicle noise reduction system comprising the microphone module, the audio processing module and the playing module, noise reduction processing can be carried out on sound outside the vehicle, the sound after noise reduction is purposefully reserved, the noise reduced sound is played, and the sound is transmitted to the target area, so that a user in the target area can listen to the sound outside.
Referring to fig. 1, the present application provides a vehicle noise reduction system 100, and the vehicle noise reduction system 100 may include a microphone module 11 disposed outside a vehicle, an audio processing module 12, and a playing module 13 disposed in a target area inside the vehicle. The microphone module 11 is used for receiving sound and generating an original audio signal based on the sound. The audio processing module 12 is connected to the microphone module 11, and the audio processing module 12 is configured to perform noise reduction processing on the original audio signal to obtain a target audio signal. The playing module 13 is configured to convert the target audio signal into a sound analog signal and play the sound analog signal, so that the sound representing the sound analog signal is transmitted to the target area.
In the present embodiment, the microphone module 11 may include a device for receiving sound outside the vehicle. For example, the microphone module 11 may include one or more microphones. In addition, the type of the microphone may be a moving coil type, a capacitance type, an electret type, a silicon microphone type, or the like, and the number and type of the microphones are not particularly limited herein. The original audio signal is used to represent the sound received by the microphone module 11. The representation of the original audio signal may be a digital signal or an analog signal.
In the present embodiment, the audio processing module 12 may be a device for data processing and converting the original audio signal. The audio processing module 12 may be implemented based on software, or based on a circuit, or based on a combination of software and a circuit, and is not limited herein. The target audio signal may be an audio signal obtained by subjecting an original audio signal to noise reduction processing.
In this embodiment, the noise reduction processing may comprise a processing step for noise reducing the sound characterized by the original audio signal. For example, the sound characterized by the original audio signal may be gained by a first multiple, which may be smaller than 1, e.g., the first multiple may be 0.2, 0.3, 0.5, etc., to obtain the target audio signal for characterizing the scaled-down sound; or extracting a valid signal from the original audio signal based on the amplitude of the original audio signal, amplifying the sound (e.g., alarm sound, distress sound, etc.) represented by the valid signal by a second multiple, where the second multiple may be greater than 1, extracting a noise signal from the original audio signal, and reducing the sound (e.g., firecracker sound, gong sound, etc.) represented by the noise signal by a third multiple, where the second multiple may be, for example, 1.2, 1.3, 1.5, etc., and the third multiple may be less than 1, for example, the third multiple may be 0.2, 0.3, 0.5, etc.; the original audio signal may also be inversely compensated by phase reversal sound wave to inversely cancel the sound characterized by the original audio signal, so that the received sound at the target area is small. That is, the manner of the noise reduction processing in the present embodiment may be various, and the manner of the noise reduction processing is not particularly limited herein.
In this embodiment, the playing module 13 may include a device for playing the sound characterized by the target audio signal. For example, the playing module 13 may include one or more speakers. In addition, the type of the speaker may be a moving coil type, a capacitor type, a reed type, a piezoelectric type, or the like, and the type of the speaker is not particularly limited herein.
In this embodiment, when the microphone module 11 may generate an original audio signal based on a sound, where the original audio signal may be a digital signal or an analog signal, the audio processing module 12 performs noise reduction processing on the original audio signal to obtain a target audio signal, where the target audio signal may be a digital signal, and the playing module 13 may convert the digital signal into a sound analog signal and play a sound represented by the sound analog signal, so that the sound is transmitted to a target area.
It should be noted that, in the present embodiment, the target area may be an area where the target user is located. The target user may be a user who needs to hear a sound outside the vehicle, for example, when the target user is a driver, the target area may be an area where a driving seat is located, and specifically, the target area may be a headrest area of a driving seat of the driving seat, so that the driver can clearly hear the sound outside the vehicle.
In this embodiment, by using the vehicle noise reduction system including the microphone module 11, the audio processing module 12, and the playing module 13, noise reduction processing can be performed on sound outside the vehicle, the noise-reduced sound is purposefully retained, and the noise-reduced sound is played and transmitted to the target area, so that a user in the target area can listen to the sound outside.
In order to better receive the sound from various directions outside the vehicle, a plurality of microphone units 111 may be provided, and in some embodiments, as shown in fig. 2, the microphone module 11 may further include a plurality of microphone units 111, the plurality of microphone units 111 are provided outside the vehicle at regular intervals, and the plurality of microphone units 111 are respectively connected to the audio processing module 12; each microphone unit 111 is configured to receive sound and generate a corresponding sub-original audio signal; the audio processing module 12 is further configured to perform noise reduction processing on the sub-original audio signals respectively to obtain corresponding sub-audio signals.
In the present embodiment, the plurality of microphone units 111 may form a microphone array. The microphone unit 111 may include one or more microphones. In addition, the type of the microphone may be a moving coil type, a capacitance type, an electret type, a silicon microphone type, or the like, and the number and type of the microphones are not particularly limited herein. Wherein the sub-raw audio signal characterizes the sound received by the microphone unit 111. The representation of the sub-original audio signal may be a digital signal or an analog signal.
The predetermined intervals may be set according to actual scene requirements, for example, the adjacent microphone units 111 may be set at the same interval or at different intervals. In some examples, the plurality of microphone units 111 may be disposed at different orientations outside the vehicle 200, thereby avoiding sound reflections. As shown in fig. 3, the number of the microphone units 111 may be four, and the four microphone units 111 may be respectively disposed outside the vehicle 200 in front, rear, left, and right directions, for example, one microphone unit 111 may be respectively disposed at the rear of the roof of the vehicle 200 (e.g., at the shark fin antenna), the left rear view mirror, the right rear view mirror, and the head of the vehicle.
In this embodiment, the audio processing module 12 may perform noise reduction processing on the sub-raw audio signals generated by the microphone units 111 respectively to obtain sub-audio signals corresponding to the microphone units 111. For example, as shown in fig. 3, the sub-original audio signal generated by the microphone unit 111 disposed on the left rear view mirror may be subjected to noise reduction processing, which may be to amplify sounds represented by the sub-original audio signal by a fourth multiple, and the sub-original audio signal generated by the microphone unit 111 disposed on the right rear view mirror may be subjected to noise reduction processing, which may be to amplify sounds represented by the sub-original audio signal by a fifth multiple, wherein the third multiple is smaller than the fourth multiple, and the third multiple and the fourth multiple are both smaller than 1, for example, the fourth multiple may be 0.7, 0.8, 0.9, and so on. Therefore, the sub-original audio signals generated by the microphone unit 111 can be subjected to corresponding noise reduction processing according to the position where the microphone unit 111 is actually arranged, so as to meet the requirements of target users in different scenes (for example, the sub-original audio signals generated by one or more microphone units 111 need to be reduced to a greater extent due to too much sound received by the microphone unit 111 arranged at a certain position or a plurality of positions outside the vehicle 200).
In this embodiment, the microphone modules 11 of the plurality of microphone units 111 are adopted, and the audio processing module 12 respectively performs response processing on the sub-original audio signals generated by the respective microphone units 111, so that the sound outside the receiving vehicle 200 is clearer and more complete, and effective information is effectively prevented from being missed by target users in a target area.
In order to better enable the target user in the target area to hear the sound from various directions outside the vehicle, a plurality of playing units 131 may be provided, and in some embodiments, as shown in fig. 2, the playing module 13 may include a plurality of playing units 131, the plurality of playing units 131 are arranged at intervals in the target area, the plurality of playing units 131 are respectively connected to the audio processing module 12, and the plurality of playing units 131 are correspondingly associated with the microphone unit 111. The plurality of playing units 131 are respectively configured to convert the sub-target audio signals obtained based on the corresponding microphone unit 111 into sub-sound analog signals so that the sound of the sub-sound analog signals can be transmitted to the target area. The playing unit 131 may include a sound emitting surface, and the sound emitting surface of the playing unit 131 may be directed to the target area. For example, if the target area is a headrest portion of a driving seat, the sound emitting surface of the playing unit 131 may be provided with sound emitting holes, and the sound emitting holes may be directed to the ear of the driver, so that the driver can better hear the sound emitted by the playing unit 131.
In this embodiment, the playing unit 131 may be a device for playing the sound characterized by the target audio signal. For example, the playing unit 131 may include one or more speakers. In addition, the type of the speaker may be a moving coil type, a capacitor type, a reed type, a piezoelectric type, or the like, and the type of the speaker is not particularly limited herein.
In addition, in the present embodiment, the relationship of the corresponding association between the plurality of playing units 131 and the microphone unit 111 may include: a playing unit 131 is associated with one microphone unit 111 correspondingly, at this time, each microphone unit 111 generates a sub-original audio signal, the audio processing module 12 performs noise reduction processing on each sub-original audio signal respectively to obtain a sub-target audio signal corresponding to each microphone unit 111, and each playing unit 131 plays the sound represented by the sub-target audio signal corresponding to the playing unit 131; one playing unit 131 may be associated with the plurality of microphone units 111 correspondingly, at this time, each microphone unit 111 generates a sub-original audio signal, the audio processing module 12 performs noise reduction processing on each sub-original audio signal respectively to obtain a sub-target audio signal corresponding to each microphone unit 111, and each playing unit 131 plays sound represented by the plurality of sub-target audio signals corresponding to the playing unit 131; the plurality of playing units 131 may be associated with one microphone unit 111, at this time, the microphone unit 111 generates a sub-original audio signal, the audio processing module 12 performs noise reduction processing on the sub-original audio signal to obtain a sub-target audio signal corresponding to the microphone unit 111, and the plurality of playing units 131 play sounds represented by the sub-target audio signal corresponding to the plurality of playing units 131. That is to say, the corresponding association between the plurality of playing units 131 and the microphone unit 111 may be that the plurality of playing units 131 correspond to one microphone unit 111, one playing unit 131 corresponds to one microphone unit 111, or one playing unit 131 corresponds to a plurality of microphone units 111, where the corresponding association relationship between the playing unit 131 and the microphone unit 111 is not particularly limited.
In the present embodiment, by using the playing module 13 including a plurality of playing units 131, the plurality of playing units 131 and the microphone units 111 are associated with each other, so that a target user in a target area can hear a sound received from the corresponding microphone unit 111, and in particular, it is preferable to separately install the plurality of microphone units 111 at different directions and at predetermined intervals outside the vehicle 200 and separately install the plurality of playing units 131 in a scene inside the vehicle 200, thereby ensuring that a target user in a target area can receive a sound based on different directions of the vehicle 200.
To further optimize the sound received by a target user within the target area, the microphone units 111 and the playback units 131 may be arranged in a prescribed orientation, and in some embodiments, multiple microphone units 111 are attached to the vehicle, with a first relative orientation between each microphone unit 111 and a reference location of the vehicle, and a second relative orientation between each playback unit 131 and the target area, with the first relative orientation of each microphone unit 111 corresponding to the second relative orientation of the playback unit 131 corresponding to that microphone unit 111.
In the present embodiment, the reference position may be a position where a component of the vehicle 200 is located, for example, the reference position may be a position where a windshield, a sunroof, or the like is located, and the reference position is not particularly limited herein. Wherein the first relative orientation existing between each microphone unit 111 and the reference position outside the vehicle 200 may include an orientation between the microphone unit 111 and the reference position, for example, when the number of the microphone units 111 is four, the four microphone units 111 may be respectively disposed at positions corresponding to a true east direction, a true south direction, a true west direction, and a true north direction at the reference position; the first relative orientation existing between each microphone unit 111 and the reference position outside the vehicle 200 may include a distance of the microphone unit 111 in the orientation of the specific reference position, for example, when the number of microphone units 111 is four, the four microphone units 111 may be respectively disposed at positions corresponding to 1.2 meters from the true east direction, 0.8 meters from the true south direction, 0.8 meters from the true west direction, and 1 meter from the true north direction. There is a second relative orientation between the playback unit 131 and the target area, for example, when the target area is a driving seat, the playback unit 131 may be disposed at various orientations of the driving seat, and the playback unit 131 may be disposed at various positions on the driving seat.
Regarding the first relative orientation of the microphone units 111 with respect to the reference position 51, fig. 4 may be taken as an example, in which case the reference position 51 may be approximately a geometric center common to the plurality of microphone units 111. Regarding the second relative orientation of the playing unit 131 with respect to the target area 52, fig. 5 can be taken as an example, and in this case, the target area 52 can be approximately a geometric center common to the plurality of playing units 131. Regarding the corresponding association relationship between the playback unit 131 and the microphone unit 111, as shown in fig. 4 to 5, the plurality of microphone units 111 may include a first microphone unit 1111, a second microphone unit 1112, a third microphone unit 1113, a fourth microphone unit 1114, and a fifth microphone unit 1115, the plurality of playback units 131 may include a first playback unit 1311, a second playback unit 1312, a third playback unit 1313, a fourth playback unit 1314, and a fifth playback unit 1315, the first microphone unit 1111 may be associated with the first playback unit 1311, and a first relative orientation of the first microphone unit 1111 with respect to the reference position 51 corresponds to a second relative orientation of the first playback unit 1311 with respect to the target area 52, for example, the first microphone unit 1111 is located at 12 o 'clock direction of the reference position 51, and the first play unit 1311 is also located at 12 o' clock direction of the target area 52; the second microphone unit 1112 may be associated with the second playback unit 1312, and the first relative orientation of the second microphone unit 1112 with respect to the reference position 51 corresponds to the second relative orientation of the second playback unit 1312 with respect to the target area 52, e.g., the second microphone unit 1112 is located at 2 o 'clock 24 minutes of the reference position 51, and the second playback unit 1312 is also located at 2 o' clock 24 minutes of the target area 52; the third microphone unit 1113 may be associated with the third playback unit 1313, and the first relative orientation of the third microphone unit 1113 with respect to the reference position 51 corresponds to the second relative orientation of the third playback unit 1313 with respect to the target area 52, for example, the third playback unit 1313 is located at 4 o 'clock 48 minutes of the reference position 51, and the third playback unit 1313 is also located at 4 o' clock 48 minutes of the target area 52; the fourth microphone unit 1114 may be associated with the fourth playback unit 1314, and a first relative orientation of the fourth microphone unit 1114 with respect to the reference position 51 corresponds to a second relative orientation of the fourth playback unit 1314 with respect to the target area 52, e.g., the fourth playback unit 1314 is located at 7 o 'clock 12 minutes of the reference position 51, and the fourth playback unit 1314 is also located at 7 o' clock 12 minutes of the target area 52; the fifth microphone unit 1115 may be associated with the fifth playback unit 1315, and a first relative orientation of the fifth microphone unit 1115 with respect to the reference position 51 corresponds to a second relative orientation of the fifth playback unit 1315 with respect to the target area 52, e.g., the fifth playback unit 1315 is located at 9 o 'clock 36 minutes of the reference position 51, and the fifth playback unit 1315 is also located at 9 o' clock 36 minutes of the target area 52; at this time, the first playing unit 1311 plays the sound represented by the sub-target audio signal corresponding to the first microphone unit 1111, the second playing unit 1312 plays the sound represented by the sub-target audio signal corresponding to the second microphone unit 1112, the third playing unit 1313 plays the sound represented by the sub-target audio signal corresponding to the third microphone unit 1113, the fourth playing unit 1314 plays the sound represented by the sub-target audio signal corresponding to the fourth microphone unit 1114, and the fifth playing unit 1315 plays the sound represented by the sub-target audio signal corresponding to the fifth microphone unit 1115.
In the present embodiment, since the number of the microphone units 111 and the playback units 131 is plural, the first relative orientation of each microphone unit 111 may correspond to the second relative orientation of the playback unit 131 corresponding to the microphone unit 111, so that the setting position of the playback unit 131 corresponding to the microphone unit 111 is substantially at the same orientation as the setting position of the microphone unit 111, thereby simulating the effect of the target user in the target area 52 listening to the sound at the reference position 51 inside the vehicle 200. For example, the microphone unit 111 provided in the left mirror of the vehicle 200 may correspond to the playback unit 131 provided in the left portion of the headrest of the driver's seat, and the microphone unit 111 provided in the right mirror of the vehicle 200 may correspond to the playback unit 131 provided in the right portion of the headrest of the driver's seat, and in this case, the playback unit 131 provided in the left portion of the headrest of the driver's seat may play a sound represented by a sub-target audio signal corresponding to the microphone unit 111 provided in the left mirror of the vehicle 200, and the playback unit 131 provided in the right portion of the headrest of the driver's seat may play a sound represented by a sub-target audio signal corresponding to the microphone unit 111 provided in the right mirror of the vehicle 200. That is, when the plurality of microphone units 111 are annularly arranged around the reference position 51, the plurality of playback units 131 may also be annularly arranged on the target area 52, and the microphone unit 111 at a certain orientation of the reference position 51 corresponds to the playback unit 131 at a certain orientation of the target area 52.
In the present embodiment, the target area 52 may be an area corresponding to the head of the driver, and taking the headrest 30 of the driver seat as shown in fig. 6 as an example, the headrest 30 includes a rear pillow portion 31, a first side portion 32 and a second side portion 33, and the first side portion 32 and the second side portion 33 are respectively disposed at two sides of the rear pillow portion 31 and are bent with respect to the rear pillow portion, so that the rear pillow portion 31, the first side portion 32 and the second side portion 33 form a recessed area approximately corresponding to the head of the driver, and the recessed area is taken as the target area. At this time, in order to enable the driver to clearly listen to the sound played by the playing module 13, the playing units 131 may be respectively provided at the back pillow part 31, the first side part 32 and the second side part 33, and each playing unit 131 may include one or more sound emitting holes 1311, each sound emitting hole 1311 facing the target area. Specifically, the sound outlet hole 1311 of the playing unit 131 provided in the rear pillow 31 may correspond to the back brain portion of the driver in the target area 52, the sound outlet hole 1311 of the playing unit 131 provided in the first side portion 32 may correspond to the right ear portion of the driver in the target area 52, and the sound outlet hole 1311 of the playing unit 131 provided in the second side portion 33 may correspond to the left ear portion of the driver in the target area 52, so that the driver can clearly listen to the sound played by each playing unit 131 and the target user can accurately know the direction from which the sound originates.
In this embodiment, the first relative orientation of each microphone unit 111 corresponds to the second relative orientation of the playing unit 131 corresponding to the microphone unit 111, and the noise reduction processing is performed on the sub-original audio signals, so that the sound received by each microphone unit 111 is subjected to noise reduction and transmitted to the corresponding playing unit 131, and the playing unit 131 further plays the sound represented by the sub-audio signal corresponding to the microphone unit 111, so that the target user in the target area 52 can generate the effect of listening to the sound at the reference position 51.
Referring to fig. 7, the present application also provides a vehicle noise reduction method, which may include the following steps S11 to S13.
Step S11: an original audio signal generated by a microphone module disposed outside a vehicle is acquired.
In the present embodiment, the original audio signal is used to characterize the sound received by the microphone module 11. The representation of the original audio signal may be a digital signal or an analog signal. When the microphone module 11 generates an original audio signal, the original audio signal may be obtained from the microphone module 11 through wired communication, for example, the wired communication may be baseband transmission, modulation transmission, or the like; the original audio signal may also be acquired from the microphone module 11 by means of wireless communication, for example, the wireless communication may be a bluetooth communication, a ultraviolet communication, or the like.
It should be noted that, in the present embodiment, the vehicle 200 provided with the microphone module 11 may be different from the vehicle 200 that acquires the original audio signal. For example, when the microphone module 11 is installed on a first vehicle and a second vehicle acquires an original audio signal, the second vehicle may play a sound received by the first vehicle, so that the second vehicle can know the current environment of the first vehicle to meet the requirements of a special scene (for example, testing the state of the vehicle 200 in an unmanned state).
Step S12: and carrying out noise reduction processing on the original audio signal to obtain a target audio signal.
In this embodiment, the noise reduction process may include a manner for reducing noise of the sound characterized by the original audio signal. For example, a sound characterized by the original audio signal may be amplified by a first multiple, which may be smaller than 1, to obtain a target audio signal for characterizing the scaled-down sound; or extracting an effective signal from the original audio signal based on the amplitude of the original audio signal, amplifying sounds (such as alarm sound, distress sound and the like) represented by the effective signal according to a second multiple, extracting a noise signal from the original audio signal, and amplifying sounds (such as firecracker sound, gong sound and the like) represented by the noise signal according to a third multiple, wherein the second multiple can be greater than 1, and the third multiple can be less than 1; the original audio signal may also be inversely compensated by phase reversal sound wave to inversely cancel the sound characterized by the original audio signal, so that the received sound at the target area is small. That is, the manner of the noise reduction processing in the present embodiment may be various, and the manner of the noise reduction processing is not particularly limited herein.
Step S13: and converting the target audio signal into a sound analog signal, and controlling a playing module arranged in a target area in the vehicle to play the sound analog signal so as to transmit the sound representing the sound analog signal to the target area.
In this embodiment, the target area may be an area where the target user is located. The target user may be a user who needs to hear a sound outside the vehicle 200, for example, when the target user is a driver, the target area may be an area where a driving seat is located, and specifically, the target area may be a headrest area of a driving seat of the driving seat, so that the driver can better hear the sound outside the vehicle.
It should be noted that the vehicle noise reduction method provided by the present embodiment may be applied to the vehicle noise reduction system 100 provided by the above embodiment, that is, the microphone module 11, the audio processing module 12 and the playing module 13 in the vehicle noise reduction system 100 may be adopted to implement the above steps S11 to S13.
In the present embodiment, through the implementation of the above steps S11 to S13, the noise reduction processing can be performed on the sound outside the vehicle, the noise reduced sound is purposefully retained, and the noise reduced sound is played and transmitted to the target area, so that the user in the target area can hear the sound outside.
The embodiment of the application further provides a vehicle noise reduction method, which can comprise the following steps: the following steps S21 to S23. The vehicle noise reduction method provided in this embodiment may include the same or similar steps as those in the above embodiments, and for the execution of the same or similar steps, reference may be made to the foregoing description, and the description is not repeated.
Step S21: the original audio signal generated by the microphone module 11 is acquired.
Step S22: and carrying out noise reduction processing on the original audio signal to obtain a target audio signal.
In this embodiment, in order to perform a targeted noise reduction process on the sound represented by the original audio signal, the sound represented by the original audio signal is distinguished, as shown in fig. 8, and the above step S22 may include the following steps S221 to S223.
Step S221: the original audio signal is analyzed to extract first target audio data and second target audio data.
In the present embodiment, the first audio data may include information of noise in the current driving environment. For example, the first audio data may be audio information for characterizing sounds of firecrackers, gong, thunder, and the like. The second audio data may include information for satisfying the target user's understanding of the current driving environment. For example, the second audio data may be audio information for characterizing sounds of whistling, alarms, calls for help, and the like.
In this embodiment, the first target audio data and the second target audio data may be extracted from the original audio signal based on the audio features by extracting the audio features in the original audio signal. For example, the original audio signal may be converted into a time-domain waveform diagram, the sound intensity of the sound at each time node in the original audio signal is obtained from the time-domain waveform diagram, and the first target audio data and the second target audio data are extracted based on the sound intensity at each time node; or acquiring a frequency spectrum corresponding to sound in the original audio signal, acquiring a formant frequency and a bandwidth based on the frequency spectrum, determining a source of the sound according to the formant frequency and the bandwidth, and extracting first target audio data and second target audio data based on the source of the sound; the time domain waveform map and the frequency spectrum can be combined to comprehensively determine the first target audio data and the second target audio data.
Step S222: and carrying out noise reduction processing on the first target audio data to obtain first preprocessing data.
In this embodiment, the performing of the noise reduction processing on the first target audio data may be to perform noise reduction on the first target audio data according to a sixth multiple, or may be to perform noise reduction on the first target audio data in a phase-reversal acoustic wave manner, so as to obtain the first preprocessed data, where the sixth multiple may be 0.2, 0.3, 0.5, and the like, for example.
Step S223: and obtaining a target audio signal based on the first pre-processing data and the second target audio data.
In this embodiment, gain processing may be performed on the second target audio data to obtain audio data corresponding to the second target audio data, and the first pre-processing data and the audio data are combined according to the original time sequence of the first target audio data and the second target audio data, so as to obtain a target audio signal; or, denoising the second target audio data according to a seventh multiple to obtain audio data corresponding to the second target audio data, and combining the first preprocessed data and the audio data according to the original time sequence of the first target audio data and the second target audio data to obtain a target audio signal, where the seventh multiple is greater than the sixth multiple, and for example, the seventh multiple may be 1.2, 0.8, 0.7, and the like.
In this embodiment, through the implementation of the steps S221 to S223, the sounds represented by the original audio signal are distinguished to obtain the first target audio data and the second target audio data, so that the sounds are classified, more useful sounds are played for the target user, noise for the target user is shielded or reduced, and the driving experience of the target user is effectively improved.
In the vehicle using process, in order to make the vehicle comfortable, the vehicle using personnel often play multimedia files such as music and radio, and in order to make the target user listen to the sound of the media file and the sound outside the vehicle 200, the second target audio data may be processed based on the volume of the multimedia, so as to ensure that the target user can listen to both the useful sound outside the vehicle 200 and the sound corresponding to the multimedia, so as to improve the vehicle using experience of the target user, as shown in fig. 9, the step S223 may include the following steps S2231 to S2233.
Step S2231: and obtaining the volume of the environment in the vehicle, and determining the audio gain according to the sound volume represented by the target audio signal and the volume of the environment in the vehicle.
In this embodiment, the volume of the in-vehicle environment may include audio generated by playing multimedia through the playing module 13. For example, the sound in the environment inside the vehicle may include sound generated by playing multimedia such as music, radio, video, etc., and the nature of the multimedia is not particularly limited herein. The volume of the sound represented by the target audio signal may be determined based on the target audio signal and the volume setting parameter of the playing module 13, or the volume of the environment in the vehicle may be determined based on the volume setting parameter of the playing module 13.
In addition, the audio gain may include a parameter for amplifying the second target audio by a certain factor. For example, the audio gain may be 0.4 times, 0.6 times, 1.2 times, etc. In some examples, when the volume of the in-vehicle environment is greater than the sound audio represented by the target audio signal, the audio gain is generally greater if the absolute value of the difference between the volume of the in-vehicle environment and the sound volume represented by the target audio signal is greater; when the volume of the environment in the vehicle is smaller than the sound audio represented by the target audio signal, if the absolute value of the difference between the volume of the environment in the vehicle and the sound volume represented by the target audio signal is larger, the audio gain is generally smaller;
step S2232: and performing gain processing on the second target audio data according to the audio gain to obtain second preprocessing data.
In this embodiment, the second target audio data may be amplified by a multiple represented by the audio gain, thereby obtaining the second preprocessed data.
Step S2233: and obtaining a target audio signal based on the first pre-processing data and the second pre-processing data.
In this embodiment, the first pre-processing data and the second pre-processing data may be combined according to the original time sequence of the first target audio data and the second target audio data, so as to obtain the target audio signal.
In this embodiment, through the implementation of the above steps S2231 to S2233, the second target audio data is processed according to the audio gain, so that the sound corresponding to the target audio signal and the sound of the environment inside the vehicle are not masked, and the sound of the media file listened to by the target user and the sound outside the vehicle 200 can be both considered, so that the target user can listen to both the useful sound outside the vehicle 200 and the sound corresponding to the multimedia, thereby improving the vehicle using experience of the target user.
Step S23: and converting the target audio signal into a sound analog signal and playing the sound analog signal so as to transmit the sound representing the sound analog signal to the target area.
In some scenarios, the target user may determine whether the sound corresponding to the target audio signal needs to be played through the current driving mode of the vehicle without listening to the sound outside the vehicle 200, and may further include the following steps S24 to S26 before the above step S21, as shown in fig. 10.
Step S24: the method comprises the steps of obtaining the current driving mode of the vehicle, wherein the driving mode comprises a manual driving mode and a full-automatic driving mode.
In the present embodiment, the current driving mode of the vehicle 200 may be determined based on a vehicle control system of the vehicle 200. The manual driving mode may include a mode in which the driver manipulates the vehicle 200 into a driving state. The fully automatic driving mode may include a mode in which the vehicle 200 is in a driving state without driver manipulation.
Step S25: if the driving mode is the manual driving mode, the microphone module 11 is controlled to enter the sleep state.
In the present embodiment, the sleep state may include the microphone module 11 being in a state of stopping generation of the original audio signal based on the sound outside the vehicle 200.
Step S26: if the driving mode is the full-automatic driving mode, the microphone module 11 is controlled to enter the working state.
In the present embodiment, the operation state may include a state in which the microphone module 11 is in a state of generating an original audio signal based on sound outside the vehicle 200.
In the present embodiment, through the implementation of the above steps S24 to S26, whether the original audio signal is generated is automatically determined based on the current driving mode of the vehicle 200, and when the vehicle 200 is in the fully automatic driving mode, the playing of the sound outside the vehicle 200 to the target user can be stopped, so as to improve the vehicle using experience of the target user.
By implementing the vehicle noise reduction method of the embodiment, noise reduction processing can be performed on sound outside the vehicle, the noise-reduced sound is purposefully reserved, and the noise-reduced sound is played and transmitted to the target area, so that a user in the target area can listen to the outside sound, and the method is particularly suitable for a vehicle with strong sound insulation capability, so that the sound received by the user outside the target area can be effectively reduced, a quiet riding environment is provided for the user outside the target area, meanwhile, the user in the target area can be prevented from missing useful information, and riding safety is improved; the method comprises the steps of distinguishing the sound represented by the original audio signal to obtain first target audio data and second target audio data, so that the sound is classified, more useful sound is played for a target user, noise for the target user is shielded or reduced, and driving experience of the target user is effectively improved; meanwhile, the second target audio data can be processed according to the audio gain, so that the sound corresponding to the target audio signal and the sound corresponding to the multimedia cannot be covered, the sound of the target user listening to the media file and the sound outside the vehicle 200 can be considered, the target user can be ensured to listen to the useful sound outside the vehicle 200 and the sound corresponding to the multimedia, and the vehicle using experience of the target user can be improved.
Referring to fig. 11, a block diagram of a noise reduction device for a vehicle according to an embodiment of the present disclosure is shown, where the noise reduction device for a vehicle may include a signal obtaining module 41, an audio signal obtaining module 42, and an audio signal playing module 43. The functional modules are explained in detail as follows:
the signal acquisition module 41 is used to acquire an original audio signal generated by the microphone module 11 provided outside the vehicle. The audio signal obtaining module 42 is configured to perform noise reduction processing on the original audio signal to obtain a target audio signal. And the audio signal playing module 43 is configured to convert the target audio signal into a sound analog signal, and control the playing module 13 disposed in the target area inside the vehicle to play the sound analog signal, so that the sound representing the sound analog signal is transmitted to the target area.
Further, as an implementation manner of the present embodiment, the audio signal acquisition module 42 may include an audio data acquisition unit, a first pre-processing data acquisition unit, and a target audio signal acquisition unit. The functional units are explained in detail as follows:
the audio data acquisition unit is used for analyzing the original audio signal to extract first target audio data and second target audio data. The first preprocessing data acquisition unit is used for carrying out noise reduction processing on the first target audio data to obtain first preprocessing data. The target audio signal acquisition unit is used for obtaining a target audio signal based on the first preprocessing data and the second target audio data.
Further, as an implementation manner of the present embodiment, the audio signal acquiring module 42 may further include an audio gain acquiring subunit, a second pre-processing data acquiring subunit, and a target audio signal acquiring subunit. The functional subunits are described in detail as follows:
and the audio gain acquisition subunit is used for acquiring the volume of the environment in the vehicle, and determining the audio gain according to the sound volume represented by the target audio signal and the volume of the environment in the vehicle. And the second preprocessing data acquisition subunit is used for performing gain processing on the second target audio data according to the audio gain to obtain second preprocessing data. And the target audio signal acquisition subunit is used for obtaining a target audio signal based on the first preprocessing data and the second preprocessing data.
Further, as an implementation manner of this embodiment, the vehicle noise reduction device provided in this embodiment may further include a driving mode obtaining module, a sleep control module, and an operation control module. The functional modules are explained in detail as follows:
the driving mode acquisition module is used for acquiring the current driving mode of the vehicle, and the driving mode comprises a manual driving mode and a full-automatic driving mode. The sleep control module is used for controlling the microphone module 11 to enter a sleep state if the driving mode is a manual driving mode. The working control module is used for controlling the microphone module 11 to enter a working state if the driving mode is a full-automatic driving mode.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of each module in the above-described apparatus may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, the coupling or direct coupling or communication connection between the modules shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or modules may be in an electrical, mechanical or other form.
In addition, functional modules in the embodiments of the present application may be integrated into one processing module, or each of the modules may exist alone physically, or two or more modules are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.
Referring to fig. 11, a vehicle according to an embodiment of the present application is shown, which includes the noise reduction system 100 of the vehicle according to the embodiment; the vehicle also includes a processor 810, a communication module 820, a memory 830, and a bus. The processor 810, the communication module 820, the memory 830, the battery 10 and the temperature control device 20 are connected to each other through a bus and perform communication with each other. The bus may be an ISA bus, PCI bus, EISA bus, CAN bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. Wherein:
and a memory 830 for storing programs. In particular, the memory 830 may be used to store software programs as well as various data. The memory 830 may mainly include a program storage area and a data storage area, wherein the program storage area may store an application program required to operate at least one function and may include program codes including computer operating instructions. In addition to storing programs, the memory 830 may temporarily store messages or the like that the communication module 820 needs to send. The memory 830 may include a high-speed RAM memory, and may further include a non-volatile memory (non-volatile memory), such as at least one Solid State Disk (SSD).
The processor 810 is configured to execute programs stored in the memory 830. The program when executed by a processor implements the steps of the vehicle noise reduction method of the various embodiments described above.
The embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the above-mentioned method for controlling an intelligent device based on permissions, and can achieve the same technical effect, and in order to avoid repetition, the details are not repeated here. The computer-readable storage medium includes, for example, a Read-Only Memory (ROM), a Random Access Memory (RAM), an SSD, a charged Erasable Programmable Read-Only Memory (EEPROM), or a Flash Memory (Flash).
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, SSD, Flash), and includes several instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the methods of the embodiments of the present application.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (11)
1. A vehicle noise reduction system, comprising:
a microphone module disposed outside the vehicle for receiving sound and generating an original audio signal based on the sound;
the audio processing module is connected with the microphone module and is used for carrying out noise reduction processing on the original audio signal to obtain a target audio signal; and
and the playing module is arranged in a target area in the vehicle and used for converting the target audio signal into a sound analog signal and playing the sound analog signal so as to transmit the sound representing the sound analog signal to the target area.
2. The system of claim 1, wherein the microphone module comprises a plurality of microphone units, the plurality of microphone units being disposed outside the vehicle at regular intervals, the plurality of microphone units being connected to the audio processing module, respectively; each microphone unit is used for receiving sound and generating a corresponding sub-original audio signal; the audio processing module is further configured to perform noise reduction processing on the sub-original audio signals respectively to obtain corresponding sub-audio signals.
3. The system according to claim 2, wherein the playing module comprises a plurality of playing units, the plurality of playing units are arranged in the target area at intervals, the plurality of playing units are respectively connected with the audio processing module, and the plurality of playing units are correspondingly associated with the microphone unit; the plurality of playing units are respectively used for converting the sub-target audio signals obtained based on the corresponding microphone units into sub-sound analog signals, so that the sound of the sub-sound analog signals is transmitted to the target area.
4. The system of claim 3, wherein a plurality of said microphone units are attached to said vehicle, and wherein a first relative orientation exists between each of said microphone units and a reference location of the vehicle, and a second relative orientation exists between each of said playback units and said target area, the first relative orientation of each of said microphone units corresponding to the second relative orientation of the playback unit corresponding to that microphone unit.
5. A vehicle noise reduction method is characterized by being applied to a vehicle and comprising the following steps:
acquiring an original audio signal generated by a microphone module disposed outside the vehicle;
carrying out noise reduction processing on the original audio signal to obtain a target audio signal; and
and converting the target audio signal into a sound analog signal, and controlling a playing module arranged in a target area in the vehicle to play the sound analog signal so as to transmit the sound representing the sound analog signal to the target area.
6. The method of claim 5, wherein the denoising the original audio signal to obtain a target audio signal comprises:
analyzing the original audio signal to extract first target audio data and second target audio data;
denoising the first target audio data to obtain first preprocessed data; and
obtaining the target audio signal based on the first pre-processing data and the second target audio data.
7. The method of claim 6, wherein deriving the target audio signal based on the first pre-processed data and the second target audio data comprises:
acquiring the volume of the environment in the vehicle, and determining audio gain according to the sound volume represented by the target audio signal and the volume of the environment in the vehicle; and
performing gain processing on the second target audio data according to the audio gain to obtain second preprocessed data; and
obtaining the target audio signal based on the first pre-processed data and the second pre-processed data.
8. The method of claim 5, wherein prior to the step of obtaining the speech signal, the method comprises:
acquiring a current driving mode of the vehicle, wherein the driving mode comprises a manual driving mode and a full-automatic driving mode;
if the driving mode is the manual driving mode, controlling the microphone module to enter a dormant state; and
and if the driving mode is the full-automatic driving mode, controlling the microphone module to enter a working state.
9. A vehicle noise reduction device, comprising:
a signal acquisition module for acquiring an original audio signal generated by a microphone module provided outside the vehicle;
the audio signal acquisition module is used for carrying out noise reduction processing on the original audio signal to obtain a target audio signal; and
and the audio signal playing module is used for converting the target audio signal into the sound analog signal, controlling a playing module arranged in a target area in the vehicle to play the sound analog signal, and transmitting the sound representing the sound analog signal to the target area.
10. A vehicle comprising the system of any one of claims 1-4, the vehicle further comprising:
a memory;
one or more processors coupled with the memory;
one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs configured to perform the method of any of claims 5-8.
11. A computer-readable storage medium, having stored thereon program code that can be invoked by a processor to perform the method according to any one of claims 5 to 8.
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