CN216886473U - Vehicle-mounted audio system - Google Patents

Abstract

The application discloses a vehicle-mounted audio system, which comprises audio output equipment, audio acquisition equipment and audio processing equipment, wherein the audio output equipment comprises a plurality of loudspeakers arranged in a vehicle, and the positions of the loudspeakers are matched with the positions of seats in the vehicle; the audio acquisition equipment is used for acquiring voice control instructions sent by personnel in the vehicle; the audio processing equipment is respectively connected with the audio acquisition equipment and the audio output equipment and used for processing the voice control instruction in a multi-voice-zone working mode to obtain position information of personnel and sending the obtained first audio data to a loudspeaker matched with the position information of the personnel. Through the mode, the loudspeaker can be used for playing different sound sources in the automobile.

Description

Vehicle-mounted audio system

Technical Field

The application relates to the field of vehicle-mounted technology, in particular to a vehicle-mounted audio system.

Background

The control interface of the traditional vehicle-mounted sound system only has standard control of adjusting volume, fading (Fade), Balance (Balance) or multi-section Balance and the like, and the man-machine interaction is inconvenient. When a driver drives a vehicle, the traditional control interface is complex to control, and the driver is easy to distract, so that the driving is very unsafe, meanwhile, the traditional control interface can not accurately control the vehicle-mounted sound system, and rear passengers can not control the car sound; in addition, when sound is played, only one sound source can be played in the whole vehicle each time, and different sound sources cannot be played in each seat.

SUMMERY OF THE UTILITY MODEL

The application provides an on-vehicle audio system, can use the speaker to broadcast different sound sources in the car.

In order to solve the technical problem, the technical scheme adopted by the application is as follows: there is provided a car audio system including: the system comprises an audio output device, an audio acquisition device and an audio processing device, wherein the audio output device comprises a plurality of loudspeakers arranged in the vehicle, and the positions of the loudspeakers are matched with the positions of seats in the vehicle; the audio acquisition equipment is used for acquiring voice control instructions sent by personnel in the vehicle; the audio processing equipment is respectively connected with the audio acquisition equipment and the audio output equipment and used for processing the voice control instruction in a multi-voice-zone working mode to obtain the position information of the personnel and sending the obtained first audio data to the loudspeaker matched with the position information of the personnel.

Through the scheme, the beneficial effects of the application are that: the utility model provides an on-vehicle audio system includes audio output equipment, audio acquisition equipment and audio processing equipment, when audio processing equipment's mode is polyphone zone mode, audio acquisition equipment sends the speech control instruction of gathering for audio processing equipment, audio processing equipment handles this speech control instruction, obtain the position information of the personnel who send the speech control instruction in the target vehicle, then send first audio data to with this position information assorted speaker, realize making the personnel of different seats can independently pass through the speaker of speech control place sound zone, the sound source that broadcast self wants to listen, satisfy different personnel's individualized demand better.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:

FIG. 1 is a schematic block diagram of an embodiment of a vehicle audio system provided herein;

FIG. 2 is a schematic structural diagram of another embodiment of a car audio system provided by the present application;

FIG. 3 is a schematic diagram of a multi-audio zone voice interaction module, an audio source management module and an audio effect management module provided in the present application;

FIG. 4 is a schematic diagram of an audio stream channel definition provided in the present application;

fig. 5 is a schematic diagram of the in-vehicle audio device, the power amplifier device, the speaker and the microphone array provided in the present application;

FIG. 6 is a schematic diagram of a sound effect signal processing module provided in the present application;

FIG. 7 is a schematic diagram of a first sound effect processing unit provided in the present application;

FIG. 8 is a schematic diagram of a second sound effect processing unit provided in the present application.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be noted that the following examples are only illustrative of the present application, and do not limit the scope of the present application. Likewise, the following examples are only some examples and not all examples of the present application, and all other examples obtained by a person of ordinary skill in the art without any inventive work are within the scope of the present application.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

It should be noted that the terms "first", "second" and "third" in the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a car audio system provided in the present application, where the car audio system includes an audio output device 10, an audio capture device 20, and an audio processing device 30.

The audio output device 10 includes a plurality of speakers 11 provided in a vehicle of a target vehicle (not shown in the drawings), the positions of the speakers 11 are matched with the positions of seats in the vehicle, and at least one speaker 11 may be provided in each seat of the target vehicle, such as: taking the target vehicle with 4 seats as an example, 2 speakers 11 may be provided at each seat of the target vehicle.

The audio acquisition equipment 20 is used for acquiring voice control instructions sent by personnel in the vehicle; specifically, the audio collection device 20 may be a microphone array for collecting sound data of each sound zone on the target vehicle; for example, taking a target vehicle with four seats as an example, two microphone arrays may be provided in front and at the back, each consisting of two microphones, so that the target vehicle can be divided into four sound zones, each corresponding to one seat of one target vehicle.

The audio processing device 30 is connected to the audio acquisition device 20 and the audio output device 10, and is configured to process the voice control instruction in the multi-voice-zone working mode to obtain the position information of the person, and send the obtained first audio data to the speaker 11 matched with the position information of the person. Specifically, the audio processing device 30 has functions of voice recognition and sound source localization, and the multi-zone operation mode is a mode in which a person in the target vehicle independently controls the sound system in the zone where the person is located, that is, persons in different zones can listen to different sound sources, such as: music, navigation sound or bluetooth telephone, each personnel's use in the car of being convenient for satisfies self demand. For example, a person a in the target vehicle wants to listen to music, and causes the speakers 11 in the zone corresponding to the person a to play music by switching the operation mode of the audio processing apparatus 30 to the multi-zone operation mode; when the person B in the target vehicle wants to watch the news, the audio processing device 30 processes the news so that the speaker 11 in the sound zone corresponding to the person B plays the news, thereby playing different sound sources in the same target vehicle.

The embodiment designs a system for man-machine interaction and play control management of a sound-splitting area, which can realize that people in different seats hear sounds of different sound sources, for example: when listening to the navigation sound, the pilot driver uses the Bluetooth telephone, and the back row personnel play the movie, or can enable personnel in several sound zones to hold a teleconference with other people. Due to the adoption of voice interaction, the loudspeaker 11 can be adjusted more accurately and quickly, for example: taking volume control as an example, the user can increase the volume by 15.5db through voice; although volume control can also be realized through a graphical interactive interface, the method is relatively troublesome and needs digital input; furthermore, although the volume may also be adjusted by presetting the volume level, it may not be possible to adjust the volume in place in one step and may not be accurate. Moreover, the voice interaction mode enables the control to be more convenient and flexible, such as: at the driving in-process, if the personnel in the car feel that the music bass is not powerful enough, though can set up the low frequency parameter through the balanced interface of adjustment, the operation is more complicated, influences driving safety, but this scheme of use can avoid producing this problem, promotes driving safety. In addition, the playing and control of the partial sound zone can be realized, and if the playing and control are realized in a graphical interface mode, the playing and control is more complex, because not every person can control the graphical interface of the car machine.

In another specific embodiment, the audio capturing device 20 may further capture a wake-up command sent by a person in the vehicle, and send the wake-up command to the audio processing device 30; the audio processing device 30 is configured to process the wake-up instruction to obtain the position information of the person corresponding to the wake-up instruction, where the wake-up instruction and the voice control instruction may correspond to the same person in the vehicle, that is, a person in the target vehicle first sends the wake-up instruction to enable the vehicle audio device to obtain the position information of the person, and then the person sends the voice control instruction to enable the audio processing device 30 to analyze the voice control instruction and execute an operation corresponding to the voice control instruction, so as to realize playing of a corresponding sound source (i.e., the first audio data).

In other specific embodiments, the operating modes of the audio processing device 30 further include a full-sound-zone operating mode, and in the full-sound-zone operating mode, the audio processing device 30 is configured to identify a voice control instruction issued by a person in the target vehicle, obtain intention information, obtain fourth audio data matched with the intention information based on the intention information, and send the fourth audio data to each speaker 11.

Further, since different sound sources need to be played simultaneously in different sound zones, the original management strategy is no longer applicable, and thus needs to be improved. Specifically, the sound sources are divided into two types of sound sources: the first type of sound source is a common sound source, which includes all types of sounds played by a media player (including music, news, phase sounds or stories, etc.), bluetooth music, or radio; the second type of sound source is an interrupt sound source, such as: navigation sound, alarm sound or bluetooth phone; in order to realize independent playing of multiple sound zones, the sound source management strategies in the working modes of the multiple sound zones and the whole sound zone are as follows:

1) sound source management strategy under whole-sound-zone working mode

A. Only one common sound source can be played at the same time, such as: when a user listens to Bluetooth music, the user cannot listen to the music; if the user wants to listen to the music, the user cannot listen to any other common sound source.

B. The navigation sound and the alarm sound in the interrupted sound source can be played together with any one common sound source; however, when the interruption sound source is played, the volume of the normal sound source is automatically lowered, and when the interruption sound source is played, the volume of the normal sound source is automatically restored.

C. When the Bluetooth telephone is played, the playing of all other common sound sources needs to be closed, only the alarm sound in the interrupted sound source is allowed to be played simultaneously, and the navigation sound is not allowed to be played.

2) Sound source management strategy under multi-sound-zone working mode

A. Each sound zone can independently play respective common sound source, but each sound zone can only play one common sound source at the same time, such as: one sound zone can play the phase sound, the other sound zone can play the Bluetooth music, but the same sound zone can not play two common sound sources at the same time.

B. If the interrupted sound source is a navigation sound and an alarm sound, the two sound sources in each sound zone can be played simultaneously with the common sound source, but when the navigation sound or the alarm sound exists, the volume of the common sound source is automatically reduced; however, in most cases, only the sound zone where the driver is located needs the navigation sound, and other sound zones do not need the navigation sound, so that whether to adjust the volume of the common sound source can be determined according to the requirements of the customer.

C. If the interrupted sound source is a Bluetooth telephone, only one sound zone can answer the telephone at the same time, and all other sound sources can not be played except the alarm sound in the sound zone. Moreover, the volume of the common sound source and the navigation sound played by all other sound zones needs to be automatically reduced, and the other sound zones cannot play multiple sound sources at the same time.

This embodiment has designed a vehicle-mounted audio system of intelligence based on many sound zones, voice interaction, closely combine the technique of pickup end (being audio acquisition equipment) and playback end (being audio output equipment), the man-machine interaction mode that has improved that current vehicle-mounted stereo set power amplifier system laggard, let original one set of sound system of car sharing become every seat and all have an independent sound system, and can also interact each other between the sound system of a plurality of sound zones, let personnel on different seats all can be independent in each sound zone just can relax through pronunciation, it is convenient, accurately control the sound system of place sound zone or whole car, satisfy the individualized demand of personnel on every seat better.

Referring to fig. 2 and fig. 3, fig. 2 is a schematic structural diagram of another embodiment of the car audio system provided in the present application, and fig. 3 is a schematic structural diagram of a multi-range voice interaction module, a sound source management module and a sound effect management module provided in the present application, where the car audio system includes an audio output device 10, a microphone array 20 and an audio processing device 30.

The audio output device 10 includes a plurality of speakers 11 provided in the vehicle, the positions of the speakers 11 matching the positions of seats in the vehicle; specifically, multiple speakers 11 are used to realize playing in multiple sound zones, and in order to ensure that the user can have better experience, more speakers 11 may be provided, such as: 12 speakers 11 are configured. Further, in order to increase isolation between sound zones, one headrest speaker may be added to each seat of the target vehicle, and thus 16 speakers 11 are provided in total in the target vehicle.

The audio processing device 30 includes a car audio device 31 and a power amplifier device 32 connected to each other; specifically, a communication protocol between the car audio device 31 and the power amplifier device 32 may adopt a Controller Area Network (CAN); the Audio data between the microphone array 20 and the car Audio device 31, and between the car Audio device 31 and the power amplifier device 32 may be transmitted by using a car Audio Bus (A2B), because the wiring cost is low; the car audio equipment 31 serves as a main node of an A2B bus, and the microphone array 20 and the power amplifier equipment 32 are both slave nodes of an A2B bus; in addition, the audio signals can be transmitted in two directions at the same time, and time-division multiplexing (TDM) audio signals with a sampling rate of 48KHZ and a maximum of 32 channels are adopted.

The car audio device 31 is configured to process the voice control command in the multi-zone operating mode to obtain identification data, where the identification data includes position information of a person and requirement information of the person, and the requirement information is used to indicate a type of sound source service specifically required by the person.

The power amplifier device 32 is connected with the car audio device 31, the audio acquisition device 20 and the audio output device 10, and the power amplifier device 32 is used for receiving position information of a person, processing the acquired first audio data, generating second audio data, and sending the second audio data to the loudspeaker 11 matched with the position information of the person.

In a specific embodiment, as shown in fig. 2, the car audio device 31 includes a sound source management module 311 and a multi-sound-zone voice interaction module 312 that are connected to each other, the sound source management module 311 is connected to the power amplifier device 32, and the sound source management module 311 is configured to obtain first audio data and forward a voice control instruction to the multi-sound-zone voice interaction module 312; the multi-sound-zone voice interaction module 312 is configured to perform recognition processing on the voice control instruction to obtain recognition data.

Further, as shown in fig. 2, the car-mounted audio device 31 may further include an audio source application module 313, where the audio source application module 313 is a set of programs or functional modules that can generate audio signals in the car-mounted audio system; specifically, the sound source application module 313 includes a bluetooth phone, bluetooth music, a radio, a navigation sound, an alarm sound, or a media player, and the media player includes a local music resource, a network music resource, news, a photo or a story, etc.

The multi-sound-zone voice interaction module 312 is used for analyzing and processing the multi-channel audio signals collected by the audio collection device 20; specifically, as shown in fig. 3, the multi-range speech interaction module 312 includes a noise reduction module 3121, an echo cancellation module 3122, a range determination module 3123, a speech recognition module 3124, and a semantic understanding module 3125, and the multi-range speech interaction module 312 can perform noise reduction and echo cancellation on input data, confirm location information of a speaker, and implement control of the system by waking up the speech recognition module 3124.

Further, the noise reduction module 3121 employs a narrow beam noise reduction algorithm, in which human voice is normally picked up and noise is suppressed within the beam (especially in the direction directly opposite to the beam); outside the beam range, both human voice and noise are largely suppressed.

The echo cancellation module 3122 is connected to the noise reduction module 3121, and dynamically estimates a coefficient of the adaptive filtering by using an output signal of the speaker 11 as a reference, and then filters an actual speech signal input by the microphone array 20, so as to cancel the sound played by the speaker 11 by the microphone array 20. Specifically, echo cancellation is a basic algorithm of bluetooth phones, and is used to prevent the echo formed by amplifying the sound at the far end of the phone through the speaker 11, which is picked up by the microphone array 20 and transmitted back to the mobile terminal (e.g., a mobile phone) at the far end.

The sound zone distinguishing module 3123 is connected with the echo canceling module 3122, it utilizes techniques such as multi-channel awakening recognition, sound energy size and sound source localization algorithm, etc., judge the pronunciation from multi-channel input synthetically, finally determine which sound zone the speaker is in, and output the pronunciation collected by the sound zone to the speech recognition module 3124; therefore, the sound zone distinguishing module 3123 has two functions, the first function is to judge the position information of the speaker, and the other function is to activate the voice recognition module 3124.

Further, when the sound zone distinguishing module 3123 determines the position information of the sound source and wakes up the voice recognition module 3124, not only the relevant voice signal is sent to the voice recognition module 3124, but also the determined relevant voice signal and the position information are sent to the sound source management module 311.

The voice recognition module 3124 is connected to the sound zone distinguishing module 3123, and is used for performing voice recognition processing; specifically, two modes, namely online identification and offline identification, can be adopted, the online identification needs to be connected with a network, a voice signal is uploaded to a cloud server (not shown in the figure) to realize identification, and the identification rate is high; the offline recognition does not need a network, and speech recognition is realized through a local processor and a local storage corpus (not shown in the figure), so that the recognition can be carried out anytime and anywhere.

The semantic understanding module 3125 is connected to the speech recognition module 3124, which can match the output related commands according to the specific application scenario of the multi-zone speech interaction module 312. Such as: when the user uses the bluetooth phone, the semantic understanding module 3125 operates in the bluetooth phone mode, commands of other modes do not immediately respond, and only commands belonging to the bluetooth phone mode are immediately sent to the sound source management module 311.

The audio management module 311 includes an input/output management module 3111 and a first control module 3112 connected to each other.

The input/output management module 3111 is connected to the multi-range voice interaction module 312 and the power amplifier device 32, and is configured to send the voice control instruction to the multi-range voice interaction module 312 and send the first audio data to the power amplifier device 32. Specifically, the input/output management module 3111 is responsible for uniformly managing audio streams, which are output through the speaker 11 by all hardware or application programs on the car machine that can generate sounds.

Further, the input/output management module 3111 collects all the sound sources in a predetermined sequence, and sends the sound sources to the power amplifier device 32 through the A2B bus, and receives the audio signals collected by the microphone array 20 and the reference signals sent to the multi-range speech interaction module 312 by the power amplifier device 32 through the A2B bus according to a predetermined sequence. Specifically, the A2B bus is a 16-output and 16-input bus, and the defined audio channels are in the order shown in fig. 4, where Slot is a time Slot, and references 1-4 correspond to reference signals.

The first control module 3112 is configured to generate a control instruction based on the position information and the working mode information of the car audio device 31, and send the control instruction to the power amplifier device 32. Specifically, the first control module 3112 is responsible for sound mixing management of an input sound source of the power amplifier device 32, output sound mixing management of the speaker 11, volume adjustment, Fade/Balance control or Tone (Tone) control, and the like, and is a control interface of the power amplifier device 32 at a vehicle end, for example, taking an Android audio system as an example, the first control module 3112 is equivalent to a device driver of the power amplifier device 32 in the Android audio system, and is an interface connecting the vehicle audio device 31 and the power amplifier device 32. Further, the polyphonic zone voice interaction module 312 precisely controls the power amplifier device 32 through the first control module 3112, so the first control module 3112 CAN also convert the instruction sent by the polyphonic zone voice interaction module 312 into a command that the power amplifier device 32 CAN understand, and finally sends the command to the power amplifier device 32 through the CAN bus.

The power amplifier device 32 includes a sound effect management module 321 and a power amplifier module 322, wherein the sound effect management module 321 includes a sound effect signal processing module 3211 and a second control module 3212.

The sound effect signal processing module 3211 is connected to the input/output management module 3111, and is configured to forward the voice control instruction to the input/output management module 3111, and process the first audio data to obtain digital audio data. Specifically, the audio Signal processing module 3211 includes a plurality of audio processing units (not shown), and the audio Signal processing module 3211 may be a Digital Signal Processor (DSP) for performing correlation calculation on input audio data, which may include: a volume adjusting module, an input mixing module, an output gain calculating module, a surround algorithm module, an equalization module, a sound amplitude limiting module or a speaker protection module (not shown in the figure).

Further, the car audio device 31 further includes a first interface 314, the power amplifier device 32 further includes a second interface 323, the first interface 314 is connected to the second interface 323, and the first interface 314 is configured to transmit the first audio data to the second interface 323 through an A2B bus, so that the second interface 323 forwards the first audio data to the sound effect signal processing module 3211.

The second control module 3212 is configured to analyze the control instruction to obtain analysis information, and control the sound effect processing unit corresponding to the person to be in a working mode based on the analysis information. Specifically, the second control module 3212 may be a Micro Controller Unit (MCU) and is responsible for performing CAN communication, power management, hardware start timing management, hardware module drive management, power amplifier diagnosis management, or sound control interface management with the power amplifier device 32.

The power amplifier module 322 is connected to the sound effect management module 321, and is configured to perform digital-to-analog conversion and amplification processing on the digital audio data output by the sound effect management module 321 to obtain second audio data; specifically, the power amplifier module 322 converts the digital audio data output by the sound effect management module 321 into analog audio data, and outputs the analog audio data to the corresponding speaker 11 after performing power amplification on the analog audio data.

Based on the above structure, how the multi-zone voice interaction module 312 manages the power amplifier device 32 and how the whole data link operates is described with reference to fig. 2 and fig. 3, taking a four-seat vehicle as shown in fig. 5 as an example, the whole control process is as follows:

1) a user sends a wake-up instruction at a certain sound zone in the vehicle of the target vehicle, the microphone array 20 collects voice data of 4 sound zones and packages the voice data into TDM signals, and sends the TDM signals to the input and output management module 3111 and the sound effect signal processing module 3211 through the A2B bus.

2) The input/output management module 3111 configures 4 microphone signals (i.e., TDM signals) and 4 reference signals, and then sends the signals to the noise reduction module 3121 and the echo cancellation module 3122, respectively.

3) After receiving the 4 paths of microphone signals, the noise reduction module 3121 performs noise reduction processing on the 4 paths of microphone signals through a beam forming algorithm, and then sends the 4 paths of microphone signals subjected to noise reduction to the echo cancellation module 3122.

4) The echo cancellation module 3122 obtains 4 paths of voice signals after noise reduction processing, performs echo cancellation calculation by combining with 4 paths of reference signals sent from the sound effect signal processing module 3211, and sends the obtained 4 paths of voice signals to the sound zone distinguishing module 3123.

5) The sound zone distinguishing module 3123 finally confirms the sound zone where the speaker is located through algorithms such as 4-way wake-up recognition, sound source localization and signal energy check, and sends the signal of the sound zone to the voice recognition module 3124 and the input/output management module 3111; in addition, the position information of the vocal tract where the speaker is located is transmitted to the first control module 3112.

6) After the vocal tract is awakened, when a user sends a voice control instruction, the voice recognition module 3124 carries out recognition processing, and a recognized result is sent to the semantic understanding module 3125; the semantic understanding module 3125 outputs a control command to the first control module 3112 according to the current specific service scenario.

7) After receiving the control command sent by the multi-zone voice interaction module 312, the first control module 3112 converts the control command into a control command understandable by the sound effect management module 321 in combination with the position information, and then sends the control command to the second control module 3212 through the CAN bus.

8) The second control module 3212 parses the control command transmitted by the CAN bus, then translates the control command into relevant parameters understandable by the sound effect signal processing module 3211, and finally sends the relevant parameters to the sound effect signal processing module 3211 for implementing sound effect signal processing through a Serial Peripheral Interface (SPI) bus.

9) The sound effect signal processing module 3211 calculates after receiving the relevant parameters, and implements the relevant functions according to the command requirements.

The following describes how to realize multi-tone zone playing and how to make one power amplifier device 32 realize the effect of multiple power amplifiers in the car.

The sound effect signal processing module 3211 is compatible with two modes: a whole-tone-range working mode and a multi-tone-range working mode. In the full-tone-range working mode, the working principle of the power amplifier device 32 is similar to that of the conventional scheme, and is not described herein again; under the working mode of the whole sound zone, sound field reconstruction, surround sound effect algorithm and other technologies can be implemented as the sound is tuned aiming at the loudspeaker 11 of the whole car, so that the music effect is better. In the multi-sound zone working mode, the signals output by the loudspeaker 11 of the appointed sound zone are respectively and independently processed; in the multi-zone operating mode, the number of the speakers 11 that can be allocated to each zone is small, and the Center (Center) speaker and the Subwoofer (Subwoofer) speaker are shared throughout the vehicle and cannot be independently allocated to each zone, so that the effect of listening to music in a single zone is inferior to that of the full-zone operating mode, but the multi-zone playing can provide differentiated services for the personnel in the vehicle, so that the single zone can be used for listening to news, stories, bluetooth phones or music, and no good effect is pursued, and relatively speaking, the processing of the sound effect signals of the single zone is simple.

As shown in fig. 6, the sound effect signal processing module 3211 further includes a first mixer 41, a second mixer 42, and an adjusting circuit 43, and each sound effect processing unit is connected to the first mixer 41 and the second mixer 42.

The first audio mixer 41 is configured to perform audio mixing processing on the first audio data, and send the audio data to a sound effect processing unit corresponding to a person; the second audio mixer 42 is configured to perform audio mixing processing on the data output by the sound processing unit to obtain a reference signal and third audio data, send the reference signal to the multi-zone voice interaction module 312 through the input/output management module 3111, and input the third audio data to the adjusting circuit 43; the adjusting circuit 43 is configured to perform amplitude limiting processing on the third audio data to obtain digital audio data. Specifically, the adjusting circuit 43 includes a first amplitude limiter 431 and a protection module 432, where the first amplitude limiter 431 is configured to perform amplitude limiting processing on the third audio data to obtain fifth audio data, and input the fifth audio data into the protection module 432; the protection module 432 processes the fifth audio data by using a speaker protection algorithm to obtain digital audio data.

Further, as shown in FIG. 6, the plurality of sound effect processing units include a first sound effect processing unit 44 and a plurality of second sound effect processing units 45, the first sound effect processing unit 44 is configured to operate in a full-range operation mode, the second sound effect processing units 45 are configured to operate in a multi-range operation mode, and the number of the second sound effect processing units 45 is matched with the number of the seats. It is understood that fig. 6 illustrates 1 first sound effect processing unit 44 and 4 second sound effect processing units 45 as an example, and the specific number of the second sound effect processing units 45 can be set according to specific needs.

In one embodiment, as shown in fig. 7, the first sound effect processing unit 44 includes a first gain calculating module 441, a first processing module 442, a second processing module 443, a second gain calculating module 444, a third mixer 445 and a second limiter 446, wherein the first gain calculating module 441 performs gain calculation on input data of 6 channels; the first processing module 442 is configured to perform pitch processing on the data output by the first gain calculating module 441, and may sequentially use a surround algorithm and a sound field reconstruction algorithm to process the data after the pitch processing, so as to obtain 12-channel data, and input the 12-channel data to the second gain calculating module 444; the second processing module 443 performs equalization processing on the input data (including the alarm tone and the navigation tone) of the 2-channel and inputs the equalized input data into the second gain calculation module 444; the second gain calculation module 444 performs gain calculation processing on the data output by the first processing module 442 and the second processing module 443; the third mixer 445 performs mixing processing on the data output by the second gain calculation module 444 and inputs the data into the second amplitude limiter 446; the second limiter 446 performs a limiting process on the data output from the third mixer 445 to obtain 12-channel output data.

As shown in fig. 8, the second sound effect processing unit 45 includes a third gain calculation module 451, a sound effect processing module 452, a third processing module 453, a fourth gain calculation module 454, a fourth mixer 455, and a third limiter 456, and the third gain calculation module 451 performs gain calculation processing on input data of 2 channels; the sound effect processing module 452 performs sound effect processing on the data output by the third gain calculation module 451; the third processing module 453 equalizes the input data of the 2-channel (including the alarm tone and the navigation tone) and inputs the equalized input data to the fourth gain calculation module 454; the fourth gain calculation module 454 performs gain calculation processing on the data output by the sound effect processing module 452 and the third processing module 453; the fourth mixer 455 performs mixing processing on the data output by the fourth gain calculation module 454; the third limiter 456 performs a limiting process on the data output from the fourth mixer 455 to obtain 4-channel output data.

The new vehicle-mounted audio system provided by the embodiment has more sound source paths and supports 16 paths of input data; the new vehicle-mounted audio system is provided with 5 paths of sound effect processing units, wherein the 5 paths of sound effect processing units comprise a 1 path of global sound effect processing unit (namely a first sound effect processing unit 44) and a 4 path of sound area sound effect processing unit (namely a second sound effect processing unit 45), and the 5 paths of sound effect processing units can work in parallel, so that the working efficiency can be improved; the enable signal can also be used to control the operation of a sound effect processing unit, and the sound effect signal processing module 3211 can be used to realize multi-audio-zone playing.

How to realize multi-audio-zone playing through the interaction between the car audio device 31 and the power amplifier device 32 is explained in a specific embodiment as follows:

1) the person a in the car issues a command to speak about listening to the network music in the multi-zone working mode, and after the multi-zone voice interaction module 312 recognizes the command, the network music player is turned on, and the position information and the working mode information of the person a are sent to the sound source management module 311.

2) The network music player plays music and puts the audio code stream into a specified channel according to the sequence defined by the input and output management module 3111; the input/output management module 3111 outputs the audio stream to the sound effect management module 321.

3) The second control module 3212 sends a control command to the sound effect management module 321 according to the position information and the operating mode information.

4) After receiving the control instruction, the second control module 3212 starts to parse the control instruction to generate a corresponding control instruction and a relevant parameter of the sound zone to be updated in the effective signal processing module 3211; controlling a sound effect processing unit of the sound zone to be in a working mode according to the sound zone where the person A is located; then, the parameters of the first mixer 41 are updated, so that the first mixer 41 only allows the common sound sources with two channels to be input to the sound effect processing unit of the designated sound zone, and the relevant parameters of the second mixer 42 are updated, so that the output signals of the designated sound zone are output to the corresponding loudspeaker 11; and finally, the control commands and all relevant parameters are sent to the sound effect signal processing module 3211.

5) The sound effect signal processing module 3211 enables the sound effect processing unit of the sound zone where the person a is located to acquire the network music signal of the 2 channels through the first audio mixer 41 according to the command issued by the second control module 3212, and performs corresponding calculation; and then the speakers 11 of the corresponding zone are mixed by the second mixer 42, thereby realizing music playback of the designated zone.

6) If the person B wants to listen to the story, after sending a corresponding voice command, the 5 steps are repeatedly executed, so that the story can be heard in the sound zone where the person B is located, and the sound source is played in the partial sound zone.

The embodiment provides a vehicle-mounted audio system, which adopts a multi-sound-zone voice interaction module based on a microphone array, and accurately controls power amplifier equipment in real time according to a voice recognition result and a sound source positioning technology; the control link of the pickup end technology and the playback end technology is opened, perfect combination of the multi-sound-zone voice interaction module and the power amplifier equipment is achieved, the traditional control mode of controlling the sound through a graphical interface or a knob and the like is abandoned, great convenience is brought to drivers and other personnel in the vehicle to control the vehicle-mounted audio system, and the requirement of the personnel in the vehicle on the differentiation of the vehicle-mounted sound is met.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings, or which are directly or indirectly applied to other related technical fields, are intended to be included within the scope of the present application.

Claims (11)

1. An in-vehicle audio system, comprising:

an audio output device including a plurality of speakers disposed in a vehicle, the speakers having positions matching positions of seats in the vehicle;

the audio acquisition equipment is used for acquiring voice control instructions sent by personnel in the vehicle;

and the audio processing equipment is respectively connected with the audio acquisition equipment and the audio output equipment and is used for processing the voice control instruction under a multi-tone-zone working mode to obtain the position information of the personnel and sending the obtained first audio data to a loudspeaker matched with the position information of the personnel.

2. The in-vehicle audio system according to claim 1, wherein the audio processing apparatus includes:

the car audio equipment is used for processing the voice control instruction in the multi-sound-zone working mode to obtain identification data, and the identification data comprises the position information of the personnel and the requirement information of the personnel;

and the power amplifier equipment is connected with the car machine audio equipment, the audio acquisition equipment and the audio output equipment, and is used for receiving the position information of the personnel, processing the first audio data to generate second audio data, and sending the second audio data to the loudspeaker matched with the position information of the personnel.

3. The car audio system according to claim 2,

the car audio equipment comprises a sound source management module and a multi-sound-zone voice interaction module which are connected with each other, wherein the sound source management module is connected with the power amplifier equipment and is used for acquiring the first audio data and forwarding the voice control instruction to the multi-sound-zone voice interaction module; and the multi-sound-zone voice interaction module is used for identifying the voice control instruction to obtain the identification data.

4. The car audio system according to claim 3,

the sound source management module comprises an input/output management module and a first control module which are connected with each other, the input/output management module is connected with the multi-sound-zone voice interaction module and the power amplifier device and is used for sending the voice control instruction to the multi-sound-zone voice interaction module and sending the first audio data to the power amplifier device; and the first control module is used for generating a control instruction based on the position information and the working mode information of the car machine audio equipment, and sending the control instruction to the power amplifier equipment.

5. The car audio system according to claim 4,

the power amplifier equipment comprises a sound effect management module and a power amplifier module, wherein the sound effect management module comprises a sound effect signal processing module, and the sound effect signal processing module is connected with the input and output management module and used for forwarding the voice control instruction to the input and output management module and processing the first audio data to obtain digital audio data; the power amplifier module is connected with the sound effect management module and used for carrying out digital-to-analog conversion and amplification processing on the digital audio data output by the sound effect management module to obtain the second audio data.

6. The car audio system according to claim 5,

the car machine audio equipment further comprises a first interface, the power amplifier equipment further comprises a second interface, the first interface is connected with the second interface and used for transmitting the first audio data to the second interface, and therefore the second interface forwards the first audio data to the sound effect signal processing module.

7. The car audio system according to claim 5,

the sound effect signal processing module comprises a plurality of sound effect processing units, the sound effect management module further comprises a second control module, and the second control module is used for analyzing the control instruction to obtain analysis information and controlling the sound effect processing units corresponding to the personnel to be in a working mode based on the analysis information.

8. The car audio system according to claim 7,

the sound effect signal processing module further comprises a first sound mixer, a second sound mixer and an adjusting circuit, each sound effect processing unit is connected with the first sound mixer and the second sound mixer, and the first sound mixer is used for carrying out sound mixing processing on the first audio data and sending the first audio data to the sound effect processing unit corresponding to the personnel; the second audio mixer is used for carrying out audio mixing processing on the data output by the sound effect processing unit to obtain a reference signal and third audio data, sending the reference signal to the multi-audio-zone voice interaction module through the input and output management module, and inputting the third audio data to the adjusting circuit; the adjusting circuit is used for carrying out amplitude limiting processing on the third audio data to obtain the digital audio data.

9. The car audio system according to claim 7,

the working mode of the audio processing equipment further comprises a total-tone-zone working mode, the sound effect processing units comprise a first sound effect processing unit and a plurality of second sound effect processing units, the first sound effect processing unit is used for working under the total-tone-zone working mode, the second sound effect processing units are used for working under the multiple-tone-zone working mode, and the quantity of the second sound effect processing units is matched with the quantity of seats.

10. The car audio system according to claim 9,

and under the working mode of the whole sound zone, the audio processing equipment is used for identifying the voice control instruction to obtain intention information, acquiring fourth audio data matched with the intention information based on the intention information, and sending the fourth audio data to each loudspeaker.

11. The car audio system according to claim 1,

the audio acquisition equipment is also used for acquiring a wake-up instruction sent by personnel in the vehicle and sending the wake-up instruction to the audio processing equipment; and the audio processing equipment is used for processing the awakening instruction to obtain the position information of the personnel corresponding to the awakening instruction.

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