Vehicle exterior sound control system and method

Abstract

The present invention relates to the field of audio equipment control technology, and specifically to a vehicle's off-vehicle sound control system and method, comprising: a human-machine interface message module, which receives user configuration information; an in-vehicle bus message module, which receives vehicle status messages sent by each microprocessor respectively; an audio generation module, which determines the sound function that needs to be enabled currently according to the user configuration information and the vehicle status information, and generates audio information according to the sound function; and an audio port module, which generates a driving signal according to the audio information and drives the off-vehicle speaker to make a sound. The beneficial effect is that by constructing a processing device, various sound functions are integrated, and the functions that need to be enabled in the current state are determined according to the user configuration information and the vehicle status information, thereby driving the off-vehicle speaker to make a sound. Driven by the above-mentioned processing flow, the vehicle only needs to be equipped with a processing device to meet the user's various off-vehicle sound needs in different scenarios, thereby achieving a more comprehensive off-vehicle sound effect.

Description

Technical Field

[0001] The present invention relates to the technical field of audio equipment control, and in particular to an off-vehicle sound control system and method. Background Art

[0002] Electric vehicles are characterized by low noise and smooth operation. They are essentially silent while driving, and cannot provide a warning to pedestrians or nearby vehicles with the roar of a traditional car's engine. For example, at speeds below 30 kilometers per hour (km / h), electric vehicles are almost completely silent. How to increase the noise level to warn pedestrians and cyclists of approaching vehicles is a safety issue facing electric vehicles.

[0003] Prior art solutions exist that utilize speakers installed on vehicles to play external warning sounds. These solutions typically connect a processing device to the external speakers, reading the vehicle's current operating status, such as throttle position and speed, via communication protocols such as CAN and A2B. Based on this status, the amplifier circuit controls the external speakers to produce a sound to alert pedestrians.

[0004] However, during actual implementation, the inventors discovered that various existing exterior vehicle audio systems are typically designed to achieve a single function, such as the Acoustic Vehicle Alerting System (AVAS) and Active Sound Enhancement (ESE). These systems are limited to a single function and fail to fully meet users' needs for exterior vehicle audio in various scenarios. Furthermore, each system is relatively independent and lacks a unified control platform, preventing efficient collaboration and concurrent operation. This can easily lead to resource monopoly and hinder the normal operation of other systems. Summary of the Invention

[0005] In view of the above-mentioned problems existing in the prior art, a vehicle exterior sound system (Sound of Outside with AVAS Platform, SOAP) is provided; on the other hand, a vehicle exterior sound method applied to the vehicle exterior sound system is also provided.

[0006] The specific technical solutions are as follows:

[0007] A vehicle exterior sound control system includes a processing device, wherein the processing device includes:

[0008] A human-machine interface message module, wherein the human-machine interface message module receives user configuration information input by the user through the human-machine interface;

[0009] An in-vehicle bus message module, the in-vehicle bus message module being connected to a plurality of microprocessors of the vehicle via an in-vehicle bus system;

[0010] The in-vehicle bus message module receives the vehicle status information sent by each microprocessor respectively;

[0011] an audio generation module, the audio generation module being connected to the human-machine interface message module and the in-vehicle bus message module, respectively, the audio generation module determining a sound function to be currently enabled according to the user configuration information and the vehicle status information, and generating audio information according to the sound function;

[0012] An audio port module is connected to the audio generation module, the audio port module generates a driving signal according to the audio information, and the audio port module uses the driving signal to drive an external speaker to produce sound.

[0013] On the other hand, the audio generation module includes:

[0014] A sound source management module, wherein the sound source management module stores multiple groups of the original audio, each group of the original audio corresponding to a different sound function;

[0015] a sound source selection module, the sound source selection module being connected to the sound source management module, and the sound source selection module determining the sound function that needs to be currently enabled based on the input vehicle status information and the user configuration information;

[0016] The sound source selection module selects the original audio as the input audio according to the sound production function;

[0017] A sound effect processing module is connected to the sound source selection module, and the sound effect processing module modulates the input audio according to the user configuration information to obtain the audio information.

[0018] On the other hand, the sound effect processing module includes:

[0019] a tone adjustment module, configured to adjust the tone of the input audio according to the vehicle status information and / or the user configuration information;

[0020] a gain control module, configured to adjust the volume of the input audio according to the vehicle status information and / or the user configuration information;

[0021] an equalizer module, wherein the equalizer module parses the input user configuration information to obtain equalizer parameters, and performs gain control on each frequency band of the input audio according to the equalizer parameters;

[0022] an echo cancellation module, wherein the echo cancellation module performs echo cancellation on the input audio;

[0023] A mixing module is configured to mix at least two of the input audios.

[0024] On the other hand, the audio generation module further includes:

[0025] a logic arbitration module, the logic arbitration module being connected to the audio source selection module and selecting the currently available input audio according to the vehicle status information;

[0026] The input audio includes: the original audio corresponding to the low-speed pedestrian warning function, the original audio corresponding to the sound wave enhancement function, the original audio corresponding to the external vehicle warning sound function, and external audio input from the outside.

[0027] On the other hand, the processing device further includes an audio acquisition module;

[0028] The audio acquisition module is connected to the in-car microphone and the audio port module respectively, and the in-car microphone collects the in-car voice and inputs it into the audio acquisition module;

[0029] The audio acquisition module inputs the in-car voice as the external audio into the audio port module, so that the audio generation module obtains the external audio.

[0030] On the other hand, the audio port module is also connected to a multimedia entertainment system, and the multimedia entertainment system outputs entertainment audio as the external audio input to the audio port module.

[0031] On the other hand, the audio generation module further includes:

[0032] A function configuration module is connected to the sound source management module, the function configuration module collects vehicle local configuration information from the microprocessor, and the function configuration module controls the original audio and the sound function available to the sound source management module according to the vehicle local configuration information.

[0033] A method for controlling exterior sound of a vehicle, applicable to the above-mentioned exterior sound control system, comprising:

[0034] Step S1: Acquire vehicle status information and user configuration information, determine a sound function to be executed according to the vehicle status information and the user configuration information, and then generate and play a first audio;

[0035] Step S2: When receiving control information input by the user, determining the sound function currently selected by the user according to the control information, and selecting input audio according to the sound function;

[0036] Step S3: construct a second audio according to the input audio and play it.

[0037] On the other hand, if the control information is voice intercom information, step S2 includes:

[0038] Step A21: When the input control information is the voice intercom information, the audio acquisition module is used to access the microphone inside the vehicle to enable the intercom function outside the vehicle;

[0039] Step A22: collecting in-car voice from the in-car microphone as the input audio corresponding to the target audio and inputting it into the sound effect generation module;

[0040] The step S3 comprises:

[0041] Step A31: If it is determined based on the vehicle status information that intercom is currently available, proceed to step A32;

[0042] Step A32: the audio source selection module cancels the selection of the input audio corresponding to the first audio, and the sound effect generation module generates and plays the second audio according to the input audio corresponding to the in-car voice and the user configuration information.

[0043] On the other hand, if the control information is external media audio information, step S2 includes:

[0044] Step B21: when the input control information is the external vehicle media audio information, enabling the external vehicle audio playback function;

[0045] Step B22: obtaining, through the audio port module, entertainment audio corresponding to the target audio inputted by the multimedia system as the input audio;

[0046] The step S3 comprises:

[0047] Step B31: selecting the input audio according to the target audio;

[0048] Step B32: Processing the input audio according to the user configuration information;

[0049] Step B33: Mix the processed input audio to obtain the second audio, and play the second audio.

[0050] The above technical solution has the following advantages or beneficial effects:

[0051] To address the problem that existing off-vehicle audio systems have relatively limited functionality and fail to fully meet user needs, this solution integrates various sound functions by constructing a processing device for platform-based unified management. This device then determines which functions need to be enabled in the current state based on user configuration information transmitted via the human-machine interface message module and vehicle status information transmitted via the in-vehicle bus message module, and then generates corresponding audio information to drive the off-vehicle speakers to produce sound. Driven by this processing flow, a vehicle only needs to be equipped with a processing device to meet users' various off-vehicle sound needs in different scenarios, achieving a more comprehensive off-vehicle sound experience. By managing various off-vehicle sound functions on a platform and configuring the audio link in an integrated manner, development costs are reduced. Because a single system uniformly controls and coordinates the operating sequence of various functions, the complexity of the entire system is also reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The embodiments of the present invention will be described more fully with reference to the accompanying drawings, which are provided for illustration and description only and are not intended to limit the scope of the present invention.

[0053] Figure 1 Schematic diagram of a processing device according to an embodiment of the present invention;

[0054] Figure 2 Schematic diagram of an in-car microphone and an out-of-car speaker in an embodiment of the present invention;

[0055] Figure 3 Schematic diagram of an audio generation module in an embodiment of the present invention;

[0056] Figure 4 Schematic diagram of a sound effect processing module in an embodiment of the present invention;

[0057] Figure 5 This is a schematic diagram of a logic arbitration module in an embodiment of the present invention;

[0058] Figure 6 Schematic diagram of an audio interaction method according to an embodiment of the present invention;

[0059] Figure 7 Schematic diagram of an audio acquisition module in an embodiment of the present invention;

[0060] Figure 8 Schematic diagram of the voice intercom process in an embodiment of the present invention;

[0061] Figure 9 Schematic diagram of a multimedia entertainment system according to an embodiment of the present invention;

[0062] Figure 10 Schematic diagram of the audio selection process in an embodiment of the present invention;

[0063] Figure 11This is a schematic diagram of a functional configuration module in an embodiment of the present invention;

[0064] Figure 12 Schematic diagram of sound wave control in an embodiment of the present invention. DETAILED DESCRIPTION

[0065] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0066] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0067] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0068] The present invention comprises:

[0069] A vehicle audio interaction system includes a processing device, the processing device including:

[0070] The human-machine interface message module 1 receives user configuration information input by the user through the human-machine interface;

[0071] In-vehicle bus message module 2, the in-vehicle bus message module 2 is connected to the microprocessors of multiple vehicles via the in-vehicle bus system;

[0072] The in-vehicle bus message module 2 receives the vehicle status information sent by each microprocessor respectively;

[0073] The audio generation module 3 is connected to the human-machine interface message module 1 and the in-vehicle bus message module 2 respectively. The audio generation module 3 determines the sound function to be currently enabled according to the user configuration information and the vehicle status information, and generates audio information according to the sound function;

[0074] The audio port module 4 is connected to the audio generation module 3. The audio port module 4 generates a driving signal according to the audio information. The audio port module uses the driving signal to drive the external speaker of the vehicle to produce sound.

[0075] Specifically, in response to the problem that the functions of the external vehicle prompt sounds in the existing technology are relatively fixed and cannot meet user needs, in this embodiment, a human-machine interface message module is set to obtain user configuration information, and the vehicle status information output by each microprocessor is collected through the in-vehicle bus message module. By parsing the user configuration information and the vehicle status information, a better judgment of the current status of the vehicle is achieved, and then the sound function that needs to be enabled for the current vehicle is effectively determined, and audio information is generated according to the sound function, and the external vehicle speaker is driven to make sound, thereby realizing the integration of various sound functions in a processing device. Users can arbitrarily select the corresponding sound function according to the actual scenario, thereby achieving a better user experience.

[0076] During implementation, the above-mentioned audio interaction system is set up in the vehicle as an outside-vehicle sound platform configured with a specific software program, and its hardware carrier is the processing device. The processing device receives the human-machine interaction message input by the user by connecting to the human-machine interface system, which includes some user configuration information, and receives the microprocessors of various components in the vehicle through the in-vehicle bus system, such as ECU, ABS, etc. to obtain the vehicle status, obtain audio information after relevant processing, and connect to the outside-vehicle audio link to control the sound of the outside-vehicle speakers. The above process can be obtained based on the modification of the audio link of the existing AVAS function, and can also be called the outside-vehicle sound system (Sound of Outside with AVAS Platform) based on AVAS. Figure 2As shown, the vehicle is equipped with two in-vehicle microphones 5, including a first microphone 501 and a second microphone 502, for collecting audio from within the vehicle, including user input. Furthermore, multiple external speakers, including a first external speaker 101, a second external speaker 102, a third external speaker 103, and a fourth external speaker 104, are provided outside the vehicle for playing external audio. These in-vehicle microphones and external speakers are connected to a processing unit (ECU). The actual audio information corresponding to the external audio varies depending on the usage scenario. For example, when the processing unit determines that the vehicle is in a low-speed driving scenario, the external audio is processed using the relevant audio algorithm according to the selected external low-speed warning tone type and then played to implement the low-speed warning function. When the processing unit determines that the vehicle is in another scenario, the corresponding audio is selected based on the actual scenario and user configuration information, and is processed using the relevant algorithm before being played to implement different functions. This can be adjusted arbitrarily based on the actual vehicle configuration. The human-machine interface message module 1 is connected to the human-machine interface (HMI) through relevant communication protocols, including the instrument panel, central control touch screen, control panel, voice recognition system, smart steering wheel and other devices, and is used to collect and store user configuration information input by the user, including the vehicle's scene mode, the sound effects selected in each scene mode, and further adjustment parameters of each sound effect. The in-vehicle bus message module 2 is connected to various functional components on the vehicle, such as the ECU, ABS module, AEB module, etc., through existing vehicle bus communication protocols, such as the CAN bus, vehicle Ethernet or equivalent communication methods. It can collect the working status actively output by each functional component through corresponding messages, thereby realizing effective collection of the vehicle's current vehicle status information. The audio generation module 3 is used to store multiple sets of data and user configuration information input by the user and process them to achieve different sound effect outputs. In some embodiments, the audio generation module is mainly used to implement the following functions: 1. AVAS (car alert sound): used to remind pedestrians to be alert to the surrounding trams; 2. ESE (engine sound enhancement): within the regulatory speed / customer-defined speed range, according to the driving status of the vehicle, multi-track sound elements are coordinated and controlled to emit recognizable outside car sounds; 3. Outside Chime (outside car alarm sound): when specific conditions are triggered, a specific prompt sound is emitted through the outside car speaker, or a recorded voice is played, such as farewell or welcome sound, to enhance the sense of ceremony; OCC (outside car call): used for conversations inside and outside the car; 5. Outside Media (outside car multimedia): play multimedia audio outside the car; the audio port module 4 is used to output digital audio data (Inter-ICSound, I2S), and its subsequent stage is provided with a decoding circuit and a power amplifier circuit for performing digital-to-analog conversion and amplification on the output data audio data, and finally driving the outside car speaker to make sound.The external speakers of the vehicle play the received audio signals outside the vehicle. The speaker system here does not limit the actual number and type of speakers and can include tweeters, woofers, full-range speakers, etc.

[0077] In one embodiment, Figure 3 As shown, the audio generation module 3 includes:

[0078] The sound source management module 31 stores multiple groups of original audio, each group of original audio corresponding to a different sound function;

[0079] The sound source selection module 32 is connected to the sound source management module 31. The sound source selection module 32 determines the sound function that needs to be enabled currently according to the input vehicle status information and user configuration information;

[0080] The audio source selection module 32 selects the original audio as the input audio according to the sound production function;

[0081] The sound effect processing module 33 is connected to the sound source selection module 32 . The sound effect processing module 33 modulates the input audio according to the user configuration information to obtain audio information.

[0082] Specifically, in order to address the problem that the functions implemented by the off-vehicle sound system in the prior art are relatively single and cannot meet user needs well, in this embodiment, multiple groups of original audio are stored in the audio generation module 3 according to different sound functions. Subsequently, the sound source selection module 32 determines the sound function that needs to be currently adopted according to the input vehicle status information and user configuration information, and then selects the corresponding original audio as the input audio, which is then modulated by the sound effect processing module 33 to finally obtain audio information, so that the final output audio information can achieve the different sound functions expected by the user in different application scenarios.

[0083] During implementation, the audio source management module 31 connects to an external storage device and searches the file system for the original audio using the input path. The original audio is then imported into the audio source management module 31 and stored in PCM format. This external storage device can be the vehicle's onboard system memory or a removable external storage device connected by the user via USB or OTG. To achieve optimal audio source management, one embodiment also constructs specific path indexes within the file system to point to the original audio corresponding to different sound generation functions. For example, the file system includes a path for the AVAS function, which stores multiple sets of low-speed warning sounds with relatively low tones that can be played continuously and looped for long periods without stuttering or popping. Furthermore, a path for the external vehicle alarm function is also provided, which stores short prompt sounds, such as the charging plug insertion prompt sound. These sound sources are typically short, lasting approximately one second. To achieve better management of various types of original audio, the sound source selection module 31 can also input relevant signals through other software modules to limit the available sound functions and original audio. For example, on certain vehicles that are not equipped with a specific sound function, all original audio corresponding to the sound function will not be output; for certain specific sound effects that are not enabled on the current vehicle, the specific original audio can also be blocked and not output. In addition, to achieve a better user experience, the sound source selection module 32 can also read the switch status of various function switches on the user's human-machine interface through user configuration information, such as whether the external vehicle prompt sound is on or off, and then choose whether to enable a specific sound function. For example: functions such as OCC will only be activated after the user manually turns them on, while AVAS, Chime sound, etc. are enabled by default, but Chime sound can be manually turned off by the user.

[0084] In one embodiment, Figure 4 As shown, the sound effect processing module 33 includes:

[0085] a tone adjustment module 331 , which adjusts the tone of the input audio according to vehicle status information and / or user configuration information;

[0086] a gain control module 332 , the gain control module 332 adjusting the volume of input audio according to vehicle status information and / or user configuration information;

[0087] The equalizer module 333 parses the input user configuration information to obtain equalizer parameters, and performs gain control on each frequency band of the input audio according to the equalizer parameters;

[0088] The echo cancellation module 334 performs echo cancellation on the input audio;

[0089] The audio mixing module 335 performs audio mixing on at least two input audios.

[0090] In one embodiment, the input audio includes in-car audio captured by an in-car microphone. In this embodiment, the equalizer module 333 performs human voice detection on the in-car audio. When human voice is detected, it performs equalization processing on the band containing the human voice. Simultaneously, the echo cancellation module 334 stores background audio captured when no human voice is present and uses it as a reference. It then compares and eliminates any excess echoes of the same frequency. Furthermore, it performs high-pass filtering on the in-car audio to filter out low-frequency signals.

[0091] In one embodiment, Figure 5 As shown, the audio generation module 3 also includes:

[0092] A logic arbitration module 34 , the logic arbitration module 34 is connected to the audio source selection module 32 , and the logic arbitration module 34 selects currently available input audio according to vehicle status information;

[0093] The input audio includes: original audio corresponding to the low-speed pedestrian warning function, original audio corresponding to the sound wave enhancement function, original audio corresponding to the external vehicle warning sound function, and external audio input from the outside.

[0094] Specifically, to achieve a richer sound effects functionality, this embodiment also includes a logic arbitration module 34 to select the original audio corresponding to different sound effects within the input audio, and configures the processing device to receive external audio as input. This configuration enables the processing device to play any external audio, including human voices, entertainment audio, special effects audio, and other input audio, as required by the user. The logic arbitration module 34 selects the input audio in the current state based on the vehicle's status information, thereby implementing the corresponding playback function and avoiding audio conflicts when multiple functions are involved.

[0095] A vehicle audio interaction method is applicable to the above-mentioned voice interaction system, such as Figure 6 Shown, including:

[0096] Step S1: obtaining vehicle status information and user configuration information, determining a sound function to be executed according to the vehicle status information and the user configuration information, and then generating and playing a first audio;

[0097] Step S2: upon receiving control information input by the user, determining the sound function currently selected by the user according to the control information, and selecting input audio according to the sound function;

[0098] Step S3: Construct a second audio according to the input audio and play it.

[0099] Specifically, to address the relatively limited functionality of existing off-board audio systems, this embodiment, after constructing the aforementioned audio interaction system, further designs the aforementioned audio interaction method. Specifically, when the vehicle is playing a first audio source, the user can input control information to switch to the desired audio source. At this point, the logic arbitration module 34 adjusts the input audio source, generates a second audio source based on the adjusted input audio source, and plays it. This setup enables a richer range of off-board audio functions.

[0100] In one embodiment, when the vehicle needs to play external audio, such as for external sound enhancement, the corresponding prompt tone is extracted from the sound source management module 31. The vehicle's current speed is then determined based on the input vehicle status information. The tone is then adjusted by the tone adjustment module 331 and the gain is then adjusted by the gain control module 332 before being output. During this process, when multimedia audio needs to be played outside the vehicle, the input multimedia audio is collected, equalized according to user configuration information by the equalizer module 333, and mixed by the mixing module 335 before being output.

[0101] In one embodiment, step S1 includes triggering a low-speed pedestrian warning function when the vehicle is traveling at a low speed, such as within the 0-30 km / h range. At this point, the audio generation module 3 invokes the audio source management module 31 to read the audio source file from the corresponding path, analyze the audio source, and convert it into a PCM data stream. The audio source supports 48 kHz, 16-bit, single-channel audio files as the original audio format. If the audio source file is to be looped, there should be no noticeable discontinuity or popping between the two ends. Subsequently, based on the national standard of 0-30 km / h vehicle speed, a dynamic sound effect volume curve is calculated for different ranges. The tone adjustment module 331 and gain control module 332 apply various preset gains to the original audio data, achieving different sound volumes and effects at different speeds, thereby achieving a pedestrian warning effect. The resulting algorithm-adjusted audio signal is then mixed with the sound effects from other functional modules by the mixing module before being output to the speaker.

[0102] In one embodiment, Figure 7 As shown, the processing device further includes an audio acquisition module 5;

[0103] The audio collection module 5 is connected to the microphones in the car, including the first microphone 501 and the second microphone 502, and the audio port module 4. The microphones in the car collect the voice in the car and input it into the audio collection module 5;

[0104] The audio collection module 5 inputs the in-car voice as external audio into the audio port module 4 , so that the audio generation module 4 obtains the external audio.

[0105] Specifically, in response to the problem that the prompt sound generation system in the prior art has relatively single functions, in this embodiment, an audio acquisition module 5 is set in the processing device to connect to the microphone in the car and collect the voice in the car. Subsequently, the audio acquisition module 5 transmits the voice in the car as input audio to the audio port module through the corresponding communication protocol, so that the audio generation module 3 can obtain the input audio and perform relevant processing, and then output it to the external speaker of the car for playback through the audio port module 4, thereby realizing the function of external broadcasting.

[0106] During the implementation process, the in-car microphone 5 is mainly used to pick up the voice in the car. It is mainly deployed in front of the driving seat, facing the main and co-driver seats, and is used to pick up the voice signals of users in different seats in the car. Through the A2B protocol, it forms a multi-channel audio signal and sends it to the audio acquisition module 5. The audio acquisition module 5 transmits the input audio to the audio port module 4 through the corresponding digital audio interface, so that the audio generation module 3 can select the in-car voice as the input audio for modulation.

[0107] In one embodiment, the control information is voice intercom information, such as Figure 8 As shown, step S2 includes:

[0108] Step A21: When the input control information is voice intercom information, the audio acquisition module is used to access the microphone inside the car to enable the intercom function outside the car;

[0109] Step A22: collecting the in-car voice from the in-car microphone as the input audio corresponding to the target audio and inputting it into the sound effect generation module;

[0110] Step S3 includes:

[0111] Step A31: If it is determined based on the vehicle status information that intercom is currently available, proceed to step A32;

[0112] Step A32: the audio source selection module cancels the selection of the input audio corresponding to the first audio, and the sound effect generation module generates and plays the second audio according to the input audio corresponding to the in-car voice and the user configuration information.

[0113] Specifically, to achieve a richer audio interaction experience, this embodiment, based on the microphone and audio acquisition module configured in the vehicle, further recognizes the user's input voice intercom information, collects the broadcast voice the user wishes to send, and modulates the broadcast voice according to the user's configuration information to obtain the audio to be played. The audio port module is used to drive the external speakers to produce the sound. At the same time, during the broadcast voice playback, the external audio playback is paused, allowing the user to use the external intercom function.

[0114] In this embodiment, in order to achieve the above process, when the user is in certain scenarios, such as when driving into a residential gate or when driving to a traffic light and preparing to give way to pedestrians, the corresponding control device can be used to trigger voice intercom information as control information. Subsequently, the in-car microphone 5 collects the in-car audio in the vehicle and sends it to the processing device based on the A2B protocol, which is processed by the audio generation module 3. When the logic arbitration module 34 determines the current state of the vehicle based on the vehicle status information, such as when it is parked, the equalizer module 333 in the audio generation module 3 performs equalization processing on the band of the human voice audio contained in the in-car audio to highlight the human voice, and performs echo cancellation and high-pass filtering through the echo cancellation module 334, and then outputs it to the audio port module 4, which selects the corresponding speaker for playback.

[0115] In one embodiment, Figure 9 As shown, the audio port module 4 is also connected to the multimedia entertainment system 6, and the multimedia entertainment system outputs entertainment audio as external audio input to the audio port module.

[0116] In one embodiment, the control information is external media audio information, such as Figure 10 As shown, step S2 includes:

[0117] Step B21: When the input control information is external media audio information, the external audio playback function is enabled;

[0118] Step B22: obtaining, through the audio port module, entertainment audio corresponding to the target audio input by the multimedia system as input audio;

[0119] Step S3 includes:

[0120] Step B31: Selecting input audio according to target audio;

[0121] Step B32: Process the input audio according to the user configuration information;

[0122] Step B33: Mix the processed input audio to obtain a second audio, and play the second audio.

[0123] Specifically, in order to achieve a richer audio interaction effect, in this embodiment, after the processing device is connected to the multimedia entertainment system 6, it further distinguishes the external media audio information input by the user. When it is judged that the user inputs external media audio information, it indicates that the user wants to play entertainment audio outside the car. At this time, the audio generation module 3 receives the entertainment audio transmitted by the multimedia entertainment system 6, and adjusts the gain and mixes it according to the user configuration information to obtain the audio to be played, and then drives the external speaker to make sound through the audio port module, thereby achieving a richer sound effect.

[0124] During implementation, when the vehicle needs to play external media audio, the processing device receives the entertainment audio input from the multimedia control system. The equalizer 333 then uses the user-configured information to balance the entertainment audio. Simultaneously, the logic arbitration module 34 determines whether any external audio playback conditions are met, including external sounds, pedestrian alerts, and charging prompts. If so, the mixing module 335 mixes the entertainment and external audio. If not, the audio is directly output.

[0125] In one embodiment, Figure 11 As shown, the audio generation module 3 also includes:

[0126] Function configuration module 35, function configuration module 35 is connected to the sound source management module 31, function configuration module 35 collects vehicle local configuration information from the microprocessor, and function configuration module 35 controls the original audio available to the sound source management module according to the vehicle local configuration information.

[0127] Specifically, in order to achieve better adaptation effects for various types of vehicles, in this embodiment, a functional configuration module 5 is also added to the audio generation module 3. The functional configuration module 5 is used to read the microprocessors of various optional components on the vehicle to obtain the local configuration information of the vehicle, thereby determining the configuration of the current vehicle and selecting the original audio open to the user based on the configuration, so as to achieve better differentiated adaptation effects.

[0128] During implementation, the function configuration module 35 pre-acquires multiple sets of vehicle local configuration information, including vehicle model, audio source path, and number of output channels. It then verifies each line of vehicle local configuration information, performing a vehicle model matching check if it passes. If the vehicle model matching check passes, the configuration information is then verified based on the vehicle model matching check result. Once each line of vehicle local configuration information passes verification, function switch information and function configuration information are generated. If any lines fail, an error is reported, ensuring optimal verification results.

[0129] In one embodiment, the control information is sound wave control information, such as Figure 12 As shown, step S2 includes:

[0130] Step C21: Acquire sound control information, and determine a target sound as a target audio according to the sound control information to enable a sound enhancement function;

[0131] Step S3 includes:

[0132] Step C31: generating the current vehicle speed according to the vehicle status information;

[0133] Step C32: modulate the target audio according to the current vehicle speed and user configuration information to obtain the second audio and play it.

[0134] Specifically, to achieve a better user experience, this embodiment further configures sound control information. When a user enters sound control information, indicating that they wish to play a specific external sound, a new target sound is selected as the target audio based on the input sound control information. Depending on the user configuration, this selection process may involve replacing the low-speed pedestrian warning tone with the sound audio, or selecting the sound audio as the new input audio in addition to the existing low-speed pedestrian warning tone. Subsequently, the audio is modulated according to the user configuration to generate the desired audio and drive the external speakers to produce sound, achieving a better playback effect.

[0135] During implementation, users can configure personalized sound sources within the vehicle's system. When an electric or gasoline vehicle reaches a certain speed, additional simulated engine sounds or existing sound effects can be added to enhance driving pleasure. When the input control information is sound control information, the logic arbitration module 34 first combines the real-time vehicle status information, reading information such as vehicle speed, throttle position, and engine status, to determine whether the low-speed pedestrian warning function is on or off, and then forwards the vehicle status information to the audio generation module 3. During this process, the audio generation module 3 calls the sound source management module 31 based on the input sound control information, reads the sound source file in the corresponding path, parses the sound source, and converts it into a PCM data stream. This differs from the low-speed pedestrian warning function in that the speed range here is no longer 0-30 km / h, but 0-220 km / h. The ESE and AVAS functions overlap in the speed range of 0-30 km / h. At this speed, both functions operate simultaneously, and the two sound effects are mixed and output. Then, based on a vehicle speed of 0-220 km / h, a dynamic volume curve for different ranges is calculated. The tone adjustment module 331 and gain control module 332 then apply various preset gains to the raw audio data. This ensures that the sound source displays different volumes and sound effects at different vehicle speeds, producing a recognizable exterior sound. The resulting algorithm-adjusted audio signal is then mixed with the sound effects from other functional modules in the mixing module before being output to the speakers.

[0136] The above are only preferred embodiments of the present invention and do not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A vehicle exterior sound control system, characterized in that: The invention comprises a processing device, wherein the processing device comprises: A human-machine interface message module, wherein the human-machine interface message module receives user configuration information input by the user through the human-machine interface; An in-vehicle bus message module, the in-vehicle bus message module being connected to a plurality of microprocessors of the vehicle via an in-vehicle bus system; The in-vehicle bus message module receives the vehicle status information sent by each microprocessor respectively; an audio generation module, the audio generation module being connected to the human-machine interface message module and the in-vehicle bus message module, respectively, the audio generation module determining a sound function to be currently enabled according to the user configuration information and the vehicle status information, and generating audio information according to the sound function; an audio port module, the audio port module being connected to the audio generation module, the audio port module generating a driving signal according to the audio information, and the audio port module using the driving signal to drive an external speaker to produce sound; The audio generation module includes: A sound source management module, wherein the sound source management module stores multiple groups of original audio, each group of the original audio corresponding to a different sound function; a sound source selection module, the sound source selection module being connected to the sound source management module, and the sound source selection module determining the sound function that needs to be currently enabled based on the input vehicle status information and the user configuration information; The sound source selection module selects the original audio as the input audio according to the sound production function; an audio effect processing module, the audio effect processing module being connected to the audio source selection module and modulating the input audio according to the user configuration information to obtain the audio information; The user also inputs control information through the human-machine interface; When the control information is sound control information, the audio generation module calls the sound source management module according to the sound control information to obtain a corresponding sound source file; Subsequently, the overlapping area of ​​vehicle speeds of the two sound functions is extracted, the two effect sounds are mixed in the overlapping area, and a dynamic adjustment sound effect volume curve is calculated in different intervals to achieve different volumes and sound effects of the sound source at different vehicle speeds.

2. The vehicle exterior sound control system according to claim 1, characterized in that: The sound effect processing module includes: a tone adjustment module, configured to adjust the tone of the input audio according to the vehicle status information and / or the user configuration information; a gain control module, configured to adjust the volume of the input audio according to the vehicle status information and / or the user configuration information; an equalizer module, wherein the equalizer module parses the input user configuration information to obtain equalizer parameters, and performs gain control on each frequency band of the input audio according to the equalizer parameters; an echo cancellation module, wherein the echo cancellation module performs echo cancellation on the input audio; A mixing module is configured to mix at least two of the input audios.

3. The vehicle exterior sound control system according to claim 1, characterized in that: The audio generation module also includes: a logic arbitration module, the logic arbitration module being connected to the audio source selection module and selecting the currently available input audio according to the vehicle status information; The input audio includes: the original audio corresponding to the low-speed pedestrian warning function, the original audio corresponding to the sound wave enhancement function, the original audio corresponding to the external vehicle warning sound function, and external audio input from the outside.

4. The vehicle exterior sound control system according to claim 3, characterized in that: The processing device also includes an audio acquisition module; The audio acquisition module is connected to the in-car microphone and the audio port module respectively, and the in-car microphone collects the in-car voice and inputs it into the audio acquisition module; The audio acquisition module inputs the in-car voice as external audio into the audio port module, so that the audio generation module obtains the external audio.

5. The vehicle exterior sound control system according to claim 3, characterized in that: The audio port module is also connected to a multimedia entertainment system, and the multimedia entertainment system outputs entertainment audio as external audio to input into the audio port module.

6. The vehicle exterior sound control system according to claim 2, characterized in that: The audio generation module also includes: A function configuration module is connected to the sound source management module, the function configuration module collects vehicle local configuration information from the microprocessor, and the function configuration module controls the original audio and the sound function available to the sound source management module according to the vehicle local configuration information.

7. A method for controlling exterior sound of a vehicle, characterized in that: The vehicle exterior sound control system according to any one of claims 1 to 6 comprises: Step S1: Acquire vehicle status information and user configuration information, determine a sound function to be executed according to the vehicle status information and the user configuration information, and then generate and play a first audio; Step S2: When receiving control information input by the user, determining the sound function currently selected by the user according to the control information, and selecting input audio according to the sound function; Step S3: constructing a second audio according to the input audio and playing the second audio.

8. The method for controlling the sound outside the vehicle according to claim 7, characterized in that: If the control information is voice intercom information, step S2 includes: Step A21: When the input control information is the voice intercom information, the audio acquisition module is used to access the microphone inside the vehicle to enable the intercom function outside the vehicle; Step A22: collecting in-car voice from the in-car microphone as the input audio corresponding to the target audio and inputting it into the sound effect generation module; The step S3 comprises: Step A31: If it is determined based on the vehicle status information that intercom is currently available, proceed to step A32; Step A32: the audio source selection module cancels the selection of the input audio corresponding to the first audio, and the sound effect generation module generates and plays the second audio according to the input audio corresponding to the in-car voice and the user configuration information.

9. The method for controlling the sound outside the vehicle according to claim 7, characterized in that: If the control information is external media audio information, step S2 includes: Step B21: when the input control information is the external vehicle media audio information, enabling the external vehicle audio playback function; Step B22: obtaining, through the audio port module, entertainment audio corresponding to the target audio input by the multimedia system as the input audio; The step S3 comprises: Step B31: selecting the input audio according to the target audio; Step B32: Processing the input audio according to the user configuration information; Step B33: Mix the processed input audio to obtain the second audio, and play the second audio.

Images