Control method and system for audio noise reduction of vehicle-mounted radio

Abstract

The invention provides a control method for audio noise reduction of a vehicle-mounted radio. The control method comprises the following steps: acquiring vehicle state information, regional characteristic information and a preset noise reduction model; determining an audio noise reduction response mode according to the vehicle state information; and obtaining audio quality information of the vehicle-mounted radio, wherein the preset noise reduction model carries out noise reduction processing on the played audio quality information according to the audio noise reduction response mode and the regional characteristic information. In the noise reduction processing process of the vehicle-mounted radio, judgment on the driving state and the regional characteristics of the vehicle is introduced, the response time of the processing signal and the noise reduction model are reasonably adjusted and controlled, and the situation that the tone quality of the radio and the user experience are affected due to excessive regulation and control is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicle audio technology, in particular to a control method and system for audio noise reduction of a vehicle radio. BACKGROUND

[0002] With the increasing number of cars, the vehicle radio has become an indispensable entertainment and information acquisition device in the driving process. However, in actual use, the signal environment of the vehicle radio is complex, which is deeply affected by the driving state of the car and the region. The current noise reduction methods of the vehicle radio mainly include stereo to mono method, high frequency cutting method and soft attenuation method. The stereo to mono method mainly filters out the subcarrier noise through stereo noise control technology, and only retains the main channel signal, while the decoding circuit stops working to avoid frequency modulation noise. The high frequency cutting method gradually attenuates the high frequency signal through a low pass filter, and increases a high pass filter to filter out low frequency noise below a certain value. The soft attenuation method gradually attenuates the volume and noise to achieve the mute effect when the electric field intensity is below a certain value.

[0003] However, the existing method for audio noise reduction of the vehicle radio ignores the signal processing in specific scenarios, which often leads to excessive attenuation of the signal, produces noise, reduces sound quality, affects the clarity and level of the sound, and seriously damages the user experience. Therefore, there is an urgent need for a control method and system for audio noise reduction of a vehicle radio to solve the problems in the prior art. SUMMARY

[0004] The present application aims to solve at least one of the technical problems in the prior art, and provides a control method and system for audio noise reduction of a vehicle radio.

[0005] In a first aspect, the present application provides a control method for audio noise reduction of a vehicle radio, comprising:

[0006] obtaining vehicle state information, regional characteristic information and a preset noise reduction model;

[0007] determining an audio noise reduction response mode according to the vehicle state information;

[0008] obtaining audio quality information of the vehicle radio, and performing noise reduction processing on the audio quality information according to the preset noise reduction model, the audio noise reduction response mode and the regional characteristic information.

[0009] Further, the vehicle state information includes vehicle driving mode and vehicle parking mode, the regional characteristic information includes strong signal area, weak signal area and interference area, and the preset noise reduction model includes automatic gain control model, stereo mixing noise reduction model, high frequency cutting noise reduction model and soft attenuation noise reduction model.

[0010] Further, according to the vehicle state information, an audio noise reduction response mode is determined, and the specific method comprises: when the vehicle state information is a driving mode, the audio noise reduction response mode is a fast response mode; and when the vehicle state information is a parking mode, the audio noise reduction response mode is a slow response mode.

[0011] Further, the audio quality information comprises a signal strength value, a noise value and an interference value; when the preset noise reduction model is an automatic gain control model, for the regional characteristic information being a strong signal area, the signal strength value starting control point of the automatic gain control model is 92dBμv; and for the regional characteristic information being a weak signal area or an interference area, the signal strength value starting control point of the automatic gain control model is 86dBμv.

[0012] Further, when the preset noise reduction model is a stereo mixing noise reduction model, the fast response starting time in the vehicle driving mode is set to 2ms, and the fast response decay time is set to 2ms; the slow response starting time in the vehicle parking mode is set to 500ms, and the slow response decay time is set to 2s; for the strong signal area, the signal strength value starting control point of the stereo mixing noise reduction model is set to 32dBμv, the slope is set to 30dB, the noise value starting control point is set to 36%, and the interference value starting control point is set to 36%; for the weak signal area, the signal strength value starting control point of the stereo mixing noise reduction model is set to 60dBμv, the slope is set to 30dB, the noise value starting control point is set to 8%, and the interference value starting control point is set to 8%; and for the interference area, the signal strength value starting control point of the stereo mixing noise reduction model is set to 60dBμv, the slope is set to 6dB, the noise value starting control point is set to 24%, and the interference value starting control point is set to 24%.

[0013] Further, when the preset noise reduction model is a high frequency cut noise reduction model, the fast response starting time in the vehicle driving mode is set to 2ms, and the fast response decay time is set to 2ms; the slow response starting time in the vehicle parking mode is set to 500ms, and the slow response decay time is set to 2s; for the strong signal area, the signal strength value starting control point of the stereo mixing noise reduction model is set to 22dBμv, the slope is set to 30dB, the noise value starting control point is set to 54%, and the interference value starting control point is set to 54%; for the weak signal area, the signal strength value starting control point of the stereo mixing noise reduction model is set to 22dBμv, the slope is set to 30dB, the noise value starting control point is set to 36%, and the interference value starting control point is set to 36%; and for the interference area, the signal strength value starting control point of the stereo mixing noise reduction model is set to 50dBμv, the slope is set to 30dB, the noise value starting control point is set to 12%, and the interference value starting control point is set to 12%.

[0014] Further, when the preset noise reduction model is a soft attenuation noise reduction model, the fast response start time in the vehicle driving mode is set to 2 ms, and the fast response attenuation time is set to 2 ms; the slow response start time in the vehicle parking mode is set to 120 ms, and the slow response attenuation time is set to 500 ms; for the strong signal area, the signal intensity value control point of the stereo sound mixing noise reduction model is set to 15 dBμv, the slope is set to 30 dB, the noise value control point is set to 68%, and the interference value control point is set to 68%; for the weak signal area, the signal intensity value control point of the stereo sound mixing noise reduction model is set to 30 dBμv, the slope is set to 6 dB, the noise value control point is set to 26%, and the interference value control point is set to 26%; for the interference area, the signal intensity value control point of the stereo sound mixing noise reduction model is set to 15 dBμv, the slope is set to 30 dB, the noise value control point is set to 50%, and the interference value control point is set to 50%.

[0015] In a second aspect, the embodiment of the present application further discloses a control system for audio noise reduction of a vehicle-mounted radio, comprising: an information acquisition unit, an audio noise reduction response mode determination unit, and an audio noise reduction processing unit; wherein:

[0016] The information acquisition unit is configured to acquire vehicle state information, area characteristic information, and a preset noise reduction model.

[0017] The audio noise reduction response mode determination unit is configured to determine an audio noise reduction response mode according to the vehicle state information.

[0018] The audio noise reduction processing unit is configured to acquire audio quality information of the vehicle-mounted radio, and the preset noise reduction model performs noise reduction processing on the audio quality information according to the audio noise reduction response mode and the area characteristic information.

[0019] In a third aspect, the embodiment of the present application discloses an electronic device, comprising:

[0020] One or more processors;

[0021] A memory configured to store one or more programs;

[0022] When the one or more programs are executed by the one or more processors, the one or more processors implement the control method for audio noise reduction.

[0023] In a fourth aspect, the embodiment of the present application discloses a computer readable medium, and the computer readable medium stores a computer program, and the computer program is executed by a processor to implement the steps in the control method for audio noise reduction.

[0024] The application provides a control method for audio noise reduction of a vehicle radio, which comprises the following steps: acquiring vehicle state information, regional characteristic information and a preset noise reduction model; determining an audio noise reduction response mode according to the vehicle state information; and acquiring audio quality information of the vehicle radio, and performing noise reduction processing on the audio quality information according to the audio noise reduction response mode and the regional characteristic information. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A flowchart of a control method for audio noise reduction of a vehicle radio is provided for the embodiment of the application.

[0026] Figure 2 A logic diagram of a control method for audio noise reduction of a vehicle radio is provided for the embodiment of the application.

[0027] Figure 3 A structural block diagram of a control system for audio noise reduction of a vehicle radio is provided for the embodiment of the application.

[0028] Figure 4 A structural block diagram of an electronic device is provided for the embodiment of the application. DETAILED DESCRIPTION

[0029] In order for those skilled in the art to better understand the technical solutions of the present application, the exemplary embodiments of the present application are described below in conjunction with the accompanying drawings, which include various details of the embodiments of the present application to help understanding, and should be considered only as exemplary. Therefore, those skilled in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. Also, in order to be clear and concise, the description below omits the description of well-known functions and structures.

[0030] In the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0031] As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0032] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. "Coupled" or "connected" or similar terms are not restricted to physical or mechanical connections or associations, but can also include electrical connections, whether direct or indirect.

[0033] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an overly literal or overly formal sense unless expressly so defined herein.

[0034] In the technical solutions of the present application, the collection, storage, use, processing, transmission, provision and disclosure of user personal information comply with relevant laws and regulations and do not violate public order and good customs. The use of user data in the technical solutions complies with relevant national laws and regulations (for example, "Information Security Technology Personal Information Security Specification" and the like). For example, appropriate measures are taken for personal information access control; the display of personal information is limited by regulations; the use purpose of personal information does not exceed the direct or reasonably related range; the use of personal information eliminates the explicit identity pointing and avoids precise positioning to a specific individual.

[0035] To solve at least one of the technical problems existing in the related art, the present application provides a control method and system for audio noise reduction of a car radio.

[0036] Figure 1 A flowchart of a control method for audio noise reduction of a car radio is provided for embodiments of the present application, which specifically includes:

[0037] S100. Obtain vehicle state information, regional characteristic information and a preset noise reduction model; in the present embodiment, the vehicle state information includes a vehicle driving mode and a vehicle parking mode, the regional characteristic information includes a strong signal area, a weak signal area and an interference area; and the preset noise reduction model includes an automatic gain control model, a stereo mixing noise reduction model, a high-frequency cutting noise reduction model and a soft attenuation noise reduction model.

[0038] Among them, the vehicle state information feedback can be judged by the vehicle-mounted system, and when the vehicle state changes, the vehicle-mounted system will inform the driver through voice. For example, when the vehicle switches from the parking mode to the driving mode, the system may issue a prompt voice such as "the vehicle has started, please fasten your seat belt"; when the vehicle stops driving and is in P gear, it may prompt "the vehicle has stopped".

[0039] The strong signal area, weak signal area and interference area in the area characteristics have important influence in many fields such as radio reception (such as vehicle radio, mobile phone signal reception, etc.). The strong signal area refers to the area in which the receiving device (such as a radio, a mobile phone, etc.) can receive a signal with relatively high intensity from the signal source (such as a radio tower, a mobile phone base station, etc.). Usually, signal strength indicators are used to measure, for example, in radio communication, the signal electric field strength can be represented by dBuV (microvolt decibel), and the signal strength value of the strong signal area is relatively large. The weak signal area is the area in which the receiving device receives a signal with weak intensity, and the signal strength value is lower than a certain threshold. This may be due to the distance of the signal source, the signal propagation process is blocked or attenuated, etc. The interference area is the area in which the receiving device receives a signal that is interfered by other irrelevant signals or electromagnetic noise, resulting in a decrease in signal quality or even unable to normally receive. The interference source can be lightning, solar activity, etc. in nature, or electronic devices, power lines, etc. in human activities.

[0040] In the embodiment, the preset noise reduction model includes an automatic gain control model, a stereo mixing noise reduction model, a high-frequency cutting noise reduction model, and a soft attenuation noise reduction model. The specific working methods of the automatic gain control model, the stereo mixing noise reduction model, the high-frequency cutting noise reduction model, and the soft attenuation noise reduction model are introduced in the embodiment S300.

[0041] S200. According to the vehicle state information, determine the audio noise reduction response mode; in this embodiment, according to the vehicle state information, determine the audio noise reduction response mode, the specific method includes: when the vehicle state information is driving mode, the audio noise reduction response mode is fast response mode, when the vehicle state information is parking mode, the audio noise reduction response mode is slow response mode.

[0042] Specifically, if the vehicle is in driving mode, the signal changes greatly due to the change of signal receiving environment, and the fast response mode is adopted to quickly adapt to the change of signal condition. If the vehicle is in parking mode, the slow response mode is adopted to adjust the signal smoothly and avoid unnecessary fluctuations. The two response modes optimize the response speed of the radio signal strength detector and the noise and multipath detector when processing weak signals, and ensure smooth sound playback.

[0043] S300. Obtain the car radio audio quality information, and the preset noise reduction model performs noise reduction processing on the playing audio quality information according to the audio noise reduction response mode and the area characteristic information.

[0044] In S300 of the embodiment, the preset noise reduction model performs noise reduction processing according to the signal quality value of the current playing radio station, and the signal quality value includes a signal strength value (level), a noise value (usn), and an interference value (wam). The starting point and the noise reduction speed of the signal quality value are called according to the area characteristic, and when the radio signal value is lower than the threshold value set by the noise reduction model, noise reduction processing is performed.

[0045] Specifically, the signal strength value reflects the power size of the audio signal, which measures how much effective energy is contained in the audio signal. When the signal strength is sufficient, it can ensure that the audio signal is not completely covered by noise and interference during transmission and processing, so that the receiving end can clearly restore the original audio content. When the signal strength is too weak, the audio signal may be overwhelmed by background noise, resulting in unclear and intermittent sound, or even unable to listen normally. The noise value refers to the strength of all unwanted signal components in the audio signal other than the useful signal. Noise can come from many aspects, such as electronic device thermal noise, environmental noise (such as wind noise, traffic noise, etc.), inherent noise of audio equipment, etc. The interference value refers to the degree of external electromagnetic interference or other signal interference on the audio signal. The interference source can be various electronic devices, power lines, radio transmitters, etc. The size of the interference value depends on the strength, distance of the interference source, and the sensitivity of the audio system to interference, etc. Interference usually causes distortion, noise, and popping sound in the audio signal.

[0046] In S300 of the embodiment, the preset noise reduction model performs noise reduction processing according to the signal quality value of the current playing radio station, and the signal quality value includes a signal strength value (level), a noise value (usn), and an interference value (wam). The starting point and the noise reduction speed of the signal quality value are called according to the area characteristic, and when the radio signal value is lower than the threshold value set by the noise reduction model, noise reduction processing is performed.

[0047] In S300 of the embodiment, the preset noise reduction model performs noise reduction processing on the playing audio quality information according to the audio noise reduction response mode and the area characteristic information, such as Figure 2 , the specific method includes: when the preset noise reduction model is an automatic gain control model, for the area characteristic information being a strong signal area, the signal strength value starting control point of the automatic gain control model is 92dBμv, and for the area characteristic information being a weak signal area or an interference area, the signal strength value starting control point of the automatic gain control model is 86dBμv.

[0048] In some preferred embodiments, when the preset noise reduction model is a stereo mixing noise reduction model, the fast response start time in the vehicle driving mode is set to 2 ms, and the fast response decay time is set to 2 ms; the slow response start time in the vehicle parking mode is set to 500 ms, and the slow response decay time is set to 2 s; for the strong signal area, the signal strength value control point of the stereo mixing noise reduction model is set to 32 dBμv, the slope is set to 30 dB, the noise value control point is set to 36%, and the interference value control point is set to 36%; for the weak signal area, the signal strength value control point of the stereo mixing noise reduction model is set to 60 dBμv, the slope is set to 30 dB, the noise value control point is set to 8%, and the interference value control point is set to 8%; for the interference area, the signal strength value control point of the stereo mixing noise reduction model is set to 60 dBμv, the slope is set to 6 dB, the noise value control point is set to 24%, and the interference value control point is set to 24%.

[0049] In some preferred embodiments, when the preset noise reduction model is a high-frequency cut noise reduction model, the fast response start time in the vehicle driving mode is set to 2 ms, and the fast response decay time is set to 2 ms; the slow response start time in the vehicle parking mode is set to 500 ms, and the slow response decay time is set to 2 s; for the strong signal area, the signal strength value control point of the stereo mixing noise reduction model is set to 22 dBμv, the slope is set to 30 dB, the noise value control point is set to 54%, and the interference value control point is set to 54%; for the weak signal area, the signal strength value control point of the stereo mixing noise reduction model is set to 22 dBμv, the slope is set to 30 dB, the noise value control point is set to 36%, and the interference value control point is set to 36%; for the interference area, the signal strength value control point of the stereo mixing noise reduction model is set to 50 dBμv, the slope is set to 30 dB, the noise value control point is set to 12%, and the interference value control point is set to 12%.

[0050] In some preferred embodiments, when the preset noise reduction model is a soft attenuation noise reduction model, the fast response start time in the vehicle driving mode is set to 2 ms, and the fast response attenuation time is set to 2 ms; the slow response start time in the vehicle parking mode is set to 120 ms, and the slow response attenuation time is set to 500 ms; for the strong signal area, the signal intensity value control point of the stereo mixing noise reduction model is set to 15 dBμv, the slope is set to 30 dB, the noise value control point is set to 68%, and the interference value control point is set to 68%; for the weak signal area, the signal intensity value control point of the stereo mixing noise reduction model is set to 30 dBμv, the slope is set to 6 dB, the noise value control point is set to 26%, and the interference value control point is set to 26%; for the interference area, the signal intensity value control point of the stereo mixing noise reduction model is set to 15 dBμv, the slope is set to 30 dB, the noise value control point is set to 50%, and the interference value control point is set to 50%.

[0051] It can be understood that when the preset noise reduction model is set, the judgment of the noise reduction processing is performed according to the signal quality value of the currently played radio audio, and when the signal value of the radio audio is lower than the threshold value set by the noise reduction model, the noise reduction processing is performed.

[0052] The embodiment can select the corresponding noise reduction mode according to the driving state of the automobile and the region where the automobile is located, can reasonably adjust and control according to the actual signal quality and the listening demand, can rapidly adjust the noise reduction strategy for the driving state of the automobile, maintains the stable sound quality, smoothly transits, and avoids unnecessary sound quality fluctuation; for different region characteristics, in the strong signal area, the excessively strong signal is suppressed to effectively reduce the background noise and the interference; in the weak signal area, the weak signal is more delicately processed to maintain the pure sound quality; in the area where the interference is serious, the volume and the noise are gradually attenuated to reduce the auditory discomfort and improve the user experience.

[0053] Based on the same inventive concept, the embodiment of the present application also provides a control system for audio noise reduction of a vehicle-mounted radio, which adopts the control method for audio noise reduction of the vehicle-mounted radio. Figure 3 , comprising: an information acquisition unit, an audio noise reduction response mode determination unit and an audio noise reduction processing unit; wherein:

[0054] The information acquisition unit is configured to acquire vehicle state information, region characteristic information and a preset noise reduction model.

[0055] The audio noise reduction response mode determination unit is configured to determine an audio noise reduction response mode according to the vehicle state information.

[0056] An audio noise reduction processing unit is configured to acquire the audio quality information of the car radio, and the preset noise reduction model is configured to perform noise reduction processing on the playing audio quality information according to the audio noise reduction response mode and the area characteristic information.

[0057] The specific working methods of the information acquisition unit, the audio noise reduction response mode determination unit and the audio noise reduction processing unit have been described in detail in the above method, and will not be described here again.

[0058] Based on the same inventive concept, the embodiments of the present application also provide an electronic device. FIG. 4 is a structural block diagram of an electronic device provided by an embodiment of the present application. As shown in the figure, Figure 4 The electronic device provided by the embodiment of the present application includes one or more processors 101, a memory 102, and one or more I / O interfaces 103. The memory 102 stores one or more programs, and when the one or more programs are executed by the one or more processors, the one or more processors implement the control method in any of the above embodiments. The one or more I / O interfaces 103 are connected between the processor and the memory, and are configured to realize the information interaction between the processor and the memory.

[0059] The processor 101 is a device with data processing capability, including but not limited to a central processing unit (CPU) and the like; the memory 102 is a device with data storage capability, including but not limited to a random access memory (RAM, more specifically SDRAM, DDR, etc.), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), and a flash memory (FLASH); and the I / O interface (read-write interface) 103 is connected between the processor 101 and the memory 102, and can realize the information interaction between the processor 101 and the memory 102, including but not limited to a data bus (Bus) and the like.

[0060] In some embodiments, the processor 101, the memory 102 and the I / O interface 103 are connected to each other and to other components of the computing device through the bus 104.

[0061] In some embodiments, the one or more processors 101 include a field programmable gate array.

[0062] The embodiments of the present application also provide a computer readable medium. The computer readable medium stores a computer program, and when the program is executed by a processor, the steps in the control method in any of the above embodiments are implemented. The computer readable storage medium can be a volatile or non-volatile computer readable storage medium.

[0063] The embodiment of the present application also provides a computer program product, comprising computer readable code or a nonvolatile computer readable storage medium carrying computer readable code, when the computer readable code is run in a processor of an electronic device, the processor in the electronic device performs the control method.

[0064] Those of ordinary skill in the art will understand that all or some of the steps in the above disclosed method, the functions of the modules / units in the system and the device can be implemented as software, firmware, hardware, or a suitable combination thereof. In a hardware implementation, the division between the functional modules / units referred to in the above description does not necessarily correspond to the division between physical components; for example, one physical component can have multiple functions, or one function or step can be performed by several physical components in cooperation. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software can be distributed on computer readable storage media, which can include computer storage media (or non-transitory media) and communication media (or transitory media).

[0065] As is well known to those of ordinary skill in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable program instructions, data structures, program modules or other data. Computer storage media includes, but is not limited to, random access memory (RAM), read only memory (ROM), erasable programmable read only memory (EPROM), static random access memory (SRAM), flash memory or other memory technology, portable compact disc read only memory (CD-ROM), digital versatile disc (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and that can be accessed by a computer. Furthermore, it is well known to those of ordinary skill in the art that communication media typically embodies computer readable program instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and can include any information delivery media. The term "modulated data signal" means a signal that has one or more of its characteristics changed or set in a predetermined manner, such as amplitude, frequency or phase, to encode a form of information in the signal. The term "dual-tone multi-frequency signaling" or "DTMF" refers to a telecommunication signaling system in which tones of two specific frequencies are used to represent specific digits. The term "touch tone" refers to a tone of a specific frequency that is used to represent a specific digit in a DTMF system.

[0066] The computer readable program instructions described herein can be downloaded to respective computing / processing devices from a computer readable storage medium or to an external computer or external storage device via a network, for example, the Internet, a local area network, a wide area network and / or a wireless network. The network can comprise copper transmission cables, optical transmission fibers, wireless transmission, routers, firewalls, switches, gateway computers and / or edge servers. A network adapter card or network interface in each computing / processing device receives computer readable program instructions from the network and forwards the computer readable program instructions for storage in a computer readable storage medium within the respective computing / processing device.

[0067] Computer readable program instructions for carrying out operations of the present application can be assembler instructions, instruction-set-architecture (ISA) instructions, machine instructions, machine dependent instructions, microcode, firmware instructions, state-setting data, or either source code or object code written in any combination of one or more programming languages, including an object oriented programming language such as Smalltalk, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The computer readable program instructions can execute entirely on the user's computing / processing device, partly on the user's computing / processing device, as a stand-alone software package, partly on the user's computing / processing device and partly on a remote computing / processing device or entirely on the remote computing / processing device or server. In the latter scenario, the remote computing / processing device can be connected to the user's computing / processing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computing / processing device, for example, through the Internet using an Internet Service Provider. In some embodiments, electronic circuitry including, for example, programmable logic circuitry, field-programmable gate array (FPGA), or programmable logic array (PLA) can execute the computer readable program instructions by utilizing state information of the computer readable program instructions to personalize the electronic circuitry, in order to perform aspects of the present application.

[0068] The computer program product described herein can be embodied specifically by hardware, software or a combination thereof. In an alternative embodiment, the computer program product is embodied specifically as a computer storage medium, and in another alternative embodiment, the computer program product is embodied specifically as a software product, such as a software development kit (SDK) or the like.

[0069] The computer program product described herein can be embodied specifically by hardware, software or a combination thereof. In an alternative embodiment, the computer program product is embodied specifically as a computer storage medium, and in another alternative embodiment, the computer program product is embodied specifically as a software product, such as a software development kit (SDK) or the like.

[0070] These computer readable program instructions can be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions / acts specified in the flowchart and / or block diagram block or blocks. These computer readable program instructions can also be stored in a computer readable storage medium that can include a non-transitory computer readable storage medium that can be a computer- readable storage medium having no data storage cycles that change state. The instructions can be executed by one or more processors of a computer, other programmable data processing apparatus, or other devices to produce a computer-implemented process such that the instructions which execute via the one or more processors of the computer or other programmable data processing devices create means for implementing the functions / acts specified in the flowchart and / or block diagram block or blocks. The computer program instructions can also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide processes for implementing the functions / acts specified in the flowchart and / or block diagram block or blocks.

[0071] The computer readable program instructions can also be loaded onto a computer, other programmable data processing apparatus, or other device to cause a series of operational steps to be performed on the computer, other programmable apparatus or other device to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide processes for implementing the functions / acts specified in the flowchart and / or block diagram block or blocks.

[0072] The flow diagrams and the block diagrams in the drawings are presented to illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to the present application. In this regard, each block in the flow diagrams and the block diagrams can represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical functions ("instructions"). In some alternative implementations, the functions noted in the blocks can occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks can sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and / or flow diagrams, and combinations thereof, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and

[0073] Example embodiments have been disclosed herein and, although specific terms are employed, they are used in a generic and descriptive sense only and not for purposes of limitation. In some instances, it will be apparent to those skilled in the art that features, characteristics or aspects described in relation to one embodiment can be applied to other embodiments, unless otherwise clearly stated. It will also be apparent to one skilled in the art that various modifications, changes, additions and omissions can be made without departing from the scope of the present application as set forth in the claims.

Claims

1. A control method for audio noise reduction of a car radio, characterized in that, The application relates to a vehicle audio noise reduction method and device. Obtain vehicle state information, area characteristic information and a preset noise reduction model; Determine an audio noise reduction response mode according to the vehicle state information; Obtain vehicle radio audio quality information, and the preset noise reduction model performs noise reduction processing on the audio quality information according to the audio noise reduction response mode and the area characteristic information.

2. The control method of audio noise reduction according to claim 1, wherein, The vehicle state information includes a vehicle driving mode and a vehicle parking mode, and the area characteristic information includes a strong signal area, a weak signal area and an interference area; the preset noise reduction model includes an automatic gain control model, a stereo mixing noise reduction model, a high-frequency cutting noise reduction model and a soft attenuation noise reduction model.

3. The control method of audio noise reduction according to claim 2, wherein, According to the vehicle state information, the audio noise reduction response mode is determined, and the specific method includes: when the vehicle state information is the driving mode, the audio noise reduction response mode is a fast response mode; and when the vehicle state information is the parking mode, the audio noise reduction response mode is a slow response mode.

4. The control method of audio noise reduction according to claim 3, wherein, The audio quality information includes a signal intensity value, a noise value and an interference value; when the preset noise reduction model is the automatic gain control model, the signal intensity value starting control point of the automatic gain control model is 92dBmuv for the area characteristic information being the strong signal area, and the signal intensity value starting control point of the automatic gain control model is 86dBmuv for the area characteristic information being the weak signal area or the interference area.

5. The control method of audio noise reduction according to claim 4, wherein, When the preset noise reduction model is the stereo mixing noise reduction model, the fast response starting time in the vehicle driving mode is set to 2ms, and the fast response decay time is set to 2ms; the slow response starting time in the vehicle parking mode is set to 500ms, and the slow response decay time is set to 2s; for the strong signal area, the signal intensity value starting control point of the stereo mixing noise reduction model is set to 32dBmuv, the slope is set to 30dB, the noise value starting control point is set to 36%, and the interference value starting control point is set to 36%; for the weak signal area, the signal intensity value starting control point of the stereo mixing noise reduction model is set to 60dBmuv, the slope is set to 30dB, the noise value starting control point is set to 8%, and the interference value starting control point is set to 8%; and for the interference area, the signal intensity value starting control point of the stereo mixing noise reduction model is set to 60dBmuv, the slope is set to 6dB, the noise value starting control point is set to 24%, and the interference value starting control point is set to 24%.

6. The control method of audio noise reduction according to claim 4, wherein, When the preset noise reduction model is a high-frequency reduction noise reduction model, the fast response start time in the vehicle driving mode is set to 2 ms, and the fast response decay time is set to 2 ms; the slow response start time in the vehicle parking mode is set to 500 ms, and the slow response decay time is set to 2 s; for the strong signal area, the signal intensity value control point of the stereo sound mixing noise reduction model is set to 22 dBμv, the slope is set to 30 dB, the noise value control point is set to 54%, and the interference value control point is set to 54%; for the weak signal area, the signal intensity value control point of the stereo sound mixing noise reduction model is set to 22 dBμv, the slope is set to 30 dB, the noise value control point is set to 36%, and the interference value control point is set to 36%; for the interference area, the signal intensity value control point of the stereo sound mixing noise reduction model is set to 50 dBμv, the slope is set to 30 dB, the noise value control point is set to 12%, and the interference value control point is set to 12%.

7. The control method of audio noise reduction according to claim 4, wherein, When the preset noise reduction model is a soft attenuation noise reduction model, the fast response start time in the vehicle driving mode is set to 2 ms, and the fast response decay time is set to 2 ms; the slow response start time in the vehicle parking mode is set to 120 ms, and the slow response decay time is set to 500 ms; for the strong signal area, the signal intensity value control point of the stereo sound mixing noise reduction model is set to 15 dBμv, the slope is set to 30 dB, the noise value control point is set to 68%, and the interference value control point is set to 68%; for the weak signal area, the signal intensity value control point of the stereo sound mixing noise reduction model is set to 30 dBμv, the slope is set to 6 dB, the noise value control point is set to 26%, and the interference value control point is set to 26%; for the interference area, the signal intensity value control point of the stereo sound mixing noise reduction model is set to 15 dBμv, the slope is set to 30 dB, the noise value control point is set to 50%, and the interference value control point is set to 50%.

8. A control system for audio noise reduction in a car radio, employing the method of any one of claims 1 to 7, characterized in that Comprising: an information acquisition unit, an audio noise reduction response mode determination unit, and an audio noise reduction processing unit; wherein: the information acquisition unit is configured to acquire vehicle state information, region characteristic information, and a preset noise reduction model; the audio noise reduction response mode determination unit is configured to determine an audio noise reduction response mode based on the vehicle state information; the audio noise reduction processing unit is configured to acquire vehicle radio audio quality information, and the preset noise reduction model performs noise reduction processing on the playing audio quality information based on the audio noise reduction response mode and the region characteristic information.

9. An electronic device, comprising: Comprising: one or more processors; a memory for storing one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors implement the method of any one of claims 1 to 7.

10. A computer readable medium having stored thereon a computer program, characterized in that The computer program is executed by the processor to implement the steps in the method of any one of claims 1 to 7.

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