CN107545908B - Audio signal processing method of vehicle-mounted system and vehicle-mounted system - Google Patents
Audio signal processing method of vehicle-mounted system and vehicle-mounted system Download PDFInfo
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Abstract
the invention discloses an audio signal processing method of a vehicle-mounted system and the vehicle-mounted system, wherein the vehicle-mounted system comprises a first system and a second system, and the audio signal processing method comprises the following steps: receiving, by the first system and the second system, a first audio signal and a second audio signal, respectively; performing signal processing on the first audio signal and the second audio signal to form a third audio signal; outputting the third audio signal. According to the invention, the vehicle-mounted system is set to be a dual system, wherein the first system can be an intelligent electronic product system consumed in the current market, the second system can be a traditional vehicle-mounted system, the experience of a vehicle-mounted system user on processing the vehicle-mounted audio is obviously improved by means of the first system, the recognizable compatible format of the vehicle-mounted audio processing is widened, the response time of the audio processing is shortened, and more complex audio signal processing and optimization problems can be carried out by utilizing the hardware structure of the dual system.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to an audio signal processing method of a vehicle-mounted system and the vehicle-mounted system.
Background
With the rapid development of the automobile industry, the automobile plays a role in the life of people, namely, a simple vehicle, and the requirement of consumers on user experience is higher and higher. In the process of using the automobile by the user, one of the important factors influencing the user experience is as follows: the sound effect of the whole automobile enables automobile manufacturers to objectively put forward higher requirements on the processing of the vehicle-mounted audio.
the existing vehicle-mounted audio processing has widely and mature used a digital audio processing mode and can achieve good audio mixing effect, but because the vehicle-mounted system per se lags behind the development of electronic products, the user experience of the system is determined to always lag behind that of consumer electronic products (such as a mobile phone system). Moreover, a single hardware structure system determines that the whole system can not perform more complex audio signal processing and optimization.
disclosure of Invention
The invention aims to provide an audio signal processing method of a vehicle-mounted system and the vehicle-mounted system, and the audio signal processing method of the vehicle-mounted system and the vehicle-mounted system are used for solving the problem that a single hardware structure system cannot perform more complex audio signal processing and optimization.
in order to achieve the above object, an aspect of the present invention provides an audio signal processing method of an in-vehicle system including a first system and a second system, the audio signal processing method including:
Receiving, by the first system and the second system, a first audio signal and a second audio signal, respectively;
Performing signal processing on the first audio signal and the second audio signal to form a third audio signal;
outputting the third audio signal.
Optionally, the in-vehicle system further includes a first audio capture module connected to the first system and a second audio capture module connected to the second system;
The receiving, by the first system and the second system, a first audio signal and a second audio signal, respectively, includes:
The first system and the second system respectively sample external audio through the first audio acquisition module and the second audio acquisition module to obtain a first analog audio signal and a second analog audio signal;
And performing analog-to-digital conversion on the first analog audio signal and the second analog audio signal respectively to obtain the first audio signal and the second audio signal.
Optionally, the signal processing the first audio signal and the second audio signal to form a third audio signal includes:
respectively carrying out noise reduction processing on the first audio signal and the second audio signal;
Comparing the loss values of the first audio signal and the second audio signal after noise reduction processing;
And taking the audio signal with a smaller loss value in the first audio signal after the noise reduction processing and the second audio signal after the noise reduction processing as the third audio signal.
Optionally, the first system and the second system receive a first audio signal and a second audio signal, respectively, comprising:
the first system acquires the first audio signal in an external device;
converting the first audio signal into the second audio signal recognizable by the second system;
Transmitting the second audio signal to the second system.
Optionally, the acquiring, by the first system, the first audio signal in an external device includes:
the first system acquires the first audio signal in the external equipment through a data interface or a wireless transmission mode.
optionally, the first audio signal is stereo;
After transmitting the second audio signal to the second system, the method further includes:
converting the second audio signal into a 5.1-channel audio signal;
The signal processing the first audio signal and the second audio signal to form a third audio signal includes:
Judging whether the 5.1 channel audio signal lacks a sub-audio signal by taking the first audio signal as a reference standard;
supplementing the sub audio signal to the 5.1-channel audio signal when the sub audio signal is absent from the 5.1-channel audio signal, and taking the supplemented 5.1-channel audio signal as the third audio signal;
When the 5.1-channel audio signal does not lack the sub audio signal, the 5.1-channel audio signal is taken as the third audio signal.
Optionally, the vehicle-mounted system further comprises a storage module;
The outputting the third audio signal includes:
And outputting the third audio signal to the storage module.
Optionally, the in-vehicle system further comprises a speaker;
The outputting the third audio signal includes:
Playing the third audio signal through the speaker.
according to a second aspect of the embodiments of the present disclosure, there is provided an in-vehicle system including:
a first system configured to receive a first audio signal;
A second system configured to receive a second audio signal;
A digital signal processor configured to perform signal processing on the first audio signal and the second audio signal to form a third audio signal; and
An output module configured to output the third audio signal.
Optionally, the method further comprises:
A first audio acquisition module connected to the first system and configured to sample external audio to obtain a first analog audio signal;
the second audio acquisition module is connected to the second system and is configured to sample external audio to obtain a second analog audio signal;
an analog-to-digital conversion module configured to perform analog-to-digital conversion on the first analog audio signal and the second analog audio signal, respectively, so that the first system obtains the first audio signal and the second system obtains the second audio signal.
Optionally, the digital signal processor comprises:
a noise reduction sub-module configured to perform noise reduction processing on the first audio signal and the second audio signal, respectively;
A comparison sub-module configured to compare the loss values of the first audio signal and the second audio signal after noise reduction processing:
and the processing submodule is configured to take the audio signal with the smaller loss value in the first audio signal after the noise reduction processing and the second audio signal after the noise reduction processing as the third audio signal.
optionally, the first system is configured to acquire the first audio signal within an external device;
the digital signal processor includes:
A conversion sub-module configured to convert the first audio signal into the second audio signal recognizable by the second system;
A transmission sub-module configured to transmit the second audio signal to the second system.
optionally, the method further comprises:
a data interface connected to the first system, the first system configured to obtain the first audio signal in the external device through the data interface; or
A wireless transmission module connected to the first system, wherein the first system is configured to acquire the first audio signal in the external device through the wireless transmission module.
Optionally, the first audio signal is stereo;
The second system is further configured to convert the second audio signal into a 5.1-channel audio signal;
the digital signal processor includes:
A judging sub-module configured to judge whether the 5.1-channel audio signal lacks a sub-audio signal with the first audio signal as a reference standard;
a supplementary sub-module configured to supplement the sub audio signal to the 5.1-channel audio signal when the sub audio signal is absent from the 5.1-channel audio signal;
A processing sub-module configured to treat the supplemented 5.1-channel audio signal as the third audio signal; or when the 5.1-channel audio signal does not lack the sub audio signal, taking the 5.1-channel audio signal as the third audio signal.
optionally, the method further comprises: a storage module;
the output module is configured to output the third audio signal to the storage module.
Optionally, the method further comprises: a speaker;
The output module is configured to play the third audio signal through the speaker.
Through the technical scheme, the following beneficial effects can be realized:
the vehicle-mounted system is set to be a dual system, wherein the first system can be an intelligent electronic product system consumed in the current market, the second system can be a traditional vehicle-mounted system, the experience of a vehicle-mounted system user on processing vehicle-mounted audio is obviously improved by means of the first system, the recognizable compatible format of vehicle-mounted audio processing is widened, the response time of audio processing is shortened, and more complex audio signal processing and optimization problems can be carried out by utilizing the hardware structure of the dual system.
the audio processing of different sound sources of different systems can be realized by utilizing the hardware structure of the dual system, so that more experience is provided for users; and the noise elimination is carried out on the audio signal acquired by the audio acquisition module, so that the possibility of further optimization is provided.
and thirdly, by utilizing the advantages of the hardware structure of the dual system, for example, when the second system is a traditional vehicle-mounted system, the second system is used for backup, so that the reliability of audio processing is improved, stereo sound received by the first system can be converted into 5.1-channel audio signals to be output, and the audio processing of the first system is optimized.
And fourthly, the third audio signal is stored in the storage module, so that the third audio signal can be prevented from being lost after the currently running system is halted.
additional features and advantages of the invention will be set forth in the detailed description which follows.
drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart illustrating an audio signal processing method of an in-vehicle system according to an exemplary embodiment.
Fig. 2 is a flowchart illustrating an audio signal processing method of an in-vehicle system according to an exemplary embodiment, including steps of receiving a first audio signal and a second audio signal through the first system and the second system, respectively.
Fig. 3 is a flowchart illustrating an audio signal processing method of an in-vehicle system according to an exemplary embodiment, including a step of performing signal processing on the first audio signal and the second audio signal.
fig. 4 is another flowchart illustrating an audio signal processing method of an in-vehicle system according to an exemplary embodiment, including steps of receiving a first audio signal and a second audio signal through the first system and the second system, respectively.
fig. 5 is another flowchart illustrating an audio signal processing method of an in-vehicle system according to an exemplary embodiment, including a step of performing signal processing on the first audio signal and the second audio signal.
FIG. 6 is a block diagram illustrating an in-vehicle system according to an exemplary embodiment.
FIG. 7 is another block diagram illustrating an in-vehicle system according to an exemplary embodiment.
FIG. 8 is a block diagram illustrating a digital signal processor of an in-vehicle system according to an exemplary embodiment.
FIG. 9 is another block diagram illustrating a digital signal processor of an in-vehicle system according to an exemplary embodiment.
description of the reference numerals
600 vehicle system 610 first system
620 second system 630 digital signal processor
640 output module 650 storage module
660 speaker 670 first audio capture module
680 second audio acquisition module 690 analog-to-digital conversion module
6301 noise reduction submodule 6302 comparison submodule
6303 processing submodule 6301a conversion submodule
6302a transmission submodule 6303a judgment submodule
6304a complement submodule 6305a processing submodule
Detailed Description
the following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
Fig. 1 is a flowchart illustrating an audio signal processing method of an in-vehicle system including a first system and a second system, as shown in fig. 1, according to an exemplary embodiment.
in step S1, a first audio signal and a second audio signal are received by the first system and the second system, respectively.
in step S2, the first audio signal and the second audio signal are signal processed to form a third audio signal.
In step S3, the third audio signal is output.
The first system and the second system in the present disclosure may be operating systems that run independently respectively, for example, the first system and the second system run Android operating systems independently respectively, or the first system and the second system run embedded operating systems independently respectively, such as Windows operating systems. In a preferred embodiment, the first system and the second system run different operating systems independently, for example, the first system runs an Android operating system, and the second system runs a Windows operating system. With the development of automotive electronic technology, people have higher and higher requirements on the safety and reliability of vehicle-mounted instruments, and the internet of vehicles also begins to develop in a large scale. In order to meet the functional requirements of the internet of vehicles and high reliability, in the dual system disclosed by the disclosure, the first system can be a smart phone platform, is an open system, can be connected with the internet, and can download, install and use various office application software; the second system is a traditional vehicle-mounted platform, is a closed system, is not connected with the Internet, is communicated with the whole vehicle system, has high reliability and can ensure the safe use of users. The two systems are communicated through the safety chip and can mutually detect, and automatic switching or switching according to a user instruction is realized.
first, in step S1, a first audio signal and a second audio signal are received by the first system and the second system, respectively. Wherein the first audio signal is an audio signal recognizable by the first system and the second audio signal is an audio signal recognizable by the second system. For example, when the first system runs an Android operating system, and the second system runs a Windows operating system, the first audio signal received by the first system is an audio signal that can be recognized by the Android operating system, and the second audio signal received by the second system is an audio signal that can be recognized by the Windows operating system. The first system and the second system may acquire the audio signals in a manner that a user sends the first audio signal and the second audio signal to the first system and the second system respectively in a wireless transmission manner. The wireless transmission mode can be to transmit the audio signal through bluetooth, and can also be to transmit the audio signal through WiFi.
in another embodiment, the first system and the second system may acquire the audio signals in a manner that a user sends the first audio signal and the second audio signal to the first system and the second system respectively through a USB data interface. Optionally, when the first system runs an open operating system, and the second system runs a closed operating system, the first audio signal is transmitted to the first system by wireless transmission, and the second audio signal is transmitted to the second system by a USB data interface.
after the first system and the second system receive the first audio signal and the second audio signal, respectively, the process proceeds to step S2, where the first audio signal and the second audio signal are processed to form a third audio signal. The digital signal processor may perform signal processing on the first audio signal and the second audio signal, compare, calculate and process the audio signals received by the two systems, select a relatively optimal audio signal as a third audio signal, and then go to step S3 to output the third audio signal.
Taking the example of transmitting a first audio signal and a second audio signal stored in a smart phone to the vehicle-mounted system, a private car of a user is loaded with the vehicle-mounted system, the first system is an Android operating system, the second system is a Windows operating system, and the vehicle-mounted system comprises a USB data interface electrically connected to the Windows operating system; when the user wants to upload the first audio signal and the second audio signal on the smart phone to the vehicle-mounted system, the vehicle-mounted system runs an Android operating system, in order to transmit the first audio signal to the Android operating system, the user opens Bluetooth on the smart phone and establishes connection with Bluetooth of the vehicle-mounted system, and after the connection is successful, the first audio signal on the smart phone is uploaded to the Android operating system through Bluetooth; in order to transmit the second audio signal to the Windows operating system, the smart phone is connected to the USB data interface through a USB data line, and the Windows operating system reads the second audio signal in the smart phone through the USB data interface; and then, the Android operating system and the Windows operating system respectively send the first audio signal and the second audio signal to a digital signal processor of the vehicle-mounted system, the digital signal processor processes the two audio signals to form a third audio signal, and finally, the third audio signal is output.
the vehicle-mounted system is set to be a dual system, wherein the first system can be an intelligent electronic product system consumed in the current market, the second system can be a traditional vehicle-mounted system, the experience of a vehicle-mounted system user on processing vehicle-mounted audio is obviously improved by means of the first system, the recognizable compatible format of vehicle-mounted audio processing is widened, the response time of audio processing is shortened, and more complex audio signal processing and optimization problems can be carried out by utilizing the hardware structure of the dual system.
Fig. 2 is a flowchart illustrating an audio signal processing method of an in-vehicle system according to an exemplary embodiment, where the method includes steps of receiving a first audio signal and a second audio signal through the first system and the second system, respectively, and as shown in fig. 2, the in-vehicle system further includes a first audio capture module connected to the first system and a second audio capture module connected to the second system, where the steps of receiving the first audio signal and the second audio signal through the first system and the second system, respectively, include the following steps.
in step S111, the first system and the second system sample external audio through the first audio capture module and the second audio capture module, respectively, to obtain a first analog audio signal and a second analog audio signal.
in step S112, analog-to-digital conversion is performed on the first analog audio signal and the second analog audio signal, respectively, so as to obtain the first audio signal and the second audio signal.
In the present disclosure, the first audio acquisition module and the second audio acquisition module may be controlled by an MCU (micro controller Unit) controller in the vehicle-mounted system to sample the external audio simultaneously. The first audio acquisition module and the second audio acquisition module can be Bluetooth microphones, and after the MCU controller sends a control signal to the two Bluetooth microphones through a control line I/O, the two Bluetooth microphones sample external audio simultaneously, so that the first analog audio signal and the second analog audio signal are obtained respectively.
next, step S112 is executed to perform analog-to-digital conversion on the first analog audio signal and the second analog audio signal, respectively, so as to obtain the first audio signal and the second audio signal. After the MCU controller sends a control signal to the analog-to-digital conversion module through the control line I/O, the analog-to-digital conversion module respectively performs analog-to-digital conversion on the first analog audio signal and the second analog audio signal, and then the first audio signal and the second audio signal are converted.
further, after the first audio signal and the second audio signal are obtained, the first audio signal and the second audio signal are respectively sent to the first system and the second system through an audio bus I2S (Inter-IC Sound; audio bus built in an integrated circuit), and then the first system and the second system respectively perform special calibration and identification on the first audio signal and the second audio signal, so that other modules in subsequent processing can identify which system the audio signal comes from.
fig. 3 is a flowchart illustrating an audio signal processing method of an in-vehicle system according to an exemplary embodiment, where the method includes performing signal processing on the first audio signal and the second audio signal, and the performing signal processing on the first audio signal and the second audio signal to form a third audio signal, as shown in fig. 3, includes the following steps.
in step S211, noise reduction processing is performed on the first audio signal and the second audio signal, respectively.
In step S212, the loss values of the first audio signal and the second audio signal after the noise reduction processing are compared.
in step S213, an audio signal with a smaller loss value in the noise-reduced first audio signal and the noise-reduced second audio signal is used as the third audio signal.
In the present disclosure, the first audio signal and the second audio signal may be signal-processed by a digital signal processor in the in-vehicle system. After the first system and the second system respectively receive the first audio signal and the second audio signal, the first audio signal and the second audio signal are transmitted to the digital signal processor through an audio bus I2S, and then step S211 is executed, where the digital signal processor respectively performs noise reduction processing on the first audio signal and the second audio signal.
after the noise reduction processing, step S212 is executed to compare the loss values of the first audio signal and the second audio signal after the noise reduction processing, specifically, the digital signal processor may compare the loss values of the first audio signal and the second audio signal according to the amplitude and the frequency of the first audio signal and the second audio signal, and determine the loss values of the two audio signals. After the comparison result, step S213 is executed to use the audio signal with the smaller loss value of the first audio signal after the noise reduction processing and the second audio signal after the noise reduction processing as the third audio signal, for example, when the loss value of the first audio signal after the noise reduction processing is smaller than the loss value of the second audio signal after the noise reduction processing, the digital signal processor outputs the first audio signal after the noise reduction processing as the third audio signal.
by utilizing the hardware structure of the dual system, the audio processing of different sound sources of different systems can be realized, and more experience is provided for users; and the noise elimination is carried out on the audio signal acquired by the audio acquisition module, so that the possibility of further optimization is provided.
Fig. 4 is another flowchart illustrating an audio signal processing method of an in-vehicle system according to an exemplary embodiment, including steps of receiving a first audio signal and a second audio signal through the first system and the second system, respectively, as shown in fig. 4, including the following steps.
in step S121, the first system acquires the first audio signal in an external device.
in step S122, the first audio signal is converted into the second audio signal that can be recognized by the second system.
In step S123, the second audio signal is transmitted to the second system.
Wherein the first system acquiring the first audio signal in an external device comprises: the first system acquires the first audio signal in the external equipment through a data interface or a wireless transmission mode.
The external device may be a mobile storage device such as a USB disk, and the first system reads the first audio signal in the USB disk through a USB data interface by inserting the USB disk into the USB data interface; the external device may also be a portable intelligent terminal, for example, a mobile phone is connected to the USB data interface through a USB data cable, and the first system reads a data file in the mobile phone through the USB data interface. The user can also transmit the first audio signal in the external device to the first system through a wireless transmission mode such as Bluetooth or WiFi.
Of course, in other embodiments, the first audio signal may be output to the first system via an AUX audio input or a CD. After the first system acquires the first audio signal, step S122 is executed, the first system sends the first audio signal to the digital signal processor through an audio bus I2S, and the digital signal processor converts the first audio signal into the second audio signal that can be recognized by the second system, so as to transmit the second audio signal to the second system.
Optionally, when the first system and the second system are different operating systems, the second system can process the audio signal by converting the first audio signal into the second audio signal that can be recognized by the second system, so that the advantages of the two systems can be integrated, and the vehicle-mounted audio processing effect can be improved.
further, after the first system acquires the first audio signal in an external device, the first system identifies the first audio signal and determines whether the first audio signal is stereo. Specifically, the first system determines whether the first audio signal is stereo sound by the frequency, sound intensity, wavelength, amplitude, phase, and the like of the audio signal. When the first audio signal is stereo, the digital signal processor transmits the second audio signal to the second system, and the method further includes: converting the second audio signal into a 5.1-channel audio signal.
next, referring to fig. 5, fig. 5 is another flowchart illustrating an audio signal processing method of an in-vehicle system according to an exemplary embodiment, where the audio signal processing method includes the step of performing signal processing on the first audio signal and the second audio signal. As shown in fig. 5, the signal processing of the first audio signal and the second audio signal to form a third audio signal includes the following steps.
in step S221, it is determined whether the 5.1-channel audio signal lacks a sub-audio signal by using the first audio signal as a reference standard.
In step S222, when the sub audio signal is absent from the 5.1-channel audio signal, the sub audio signal is supplemented to the 5.1-channel audio signal, and the supplemented 5.1-channel audio signal is taken as the third audio signal. As will be appreciated by those skilled in the art, the 5.1 channel is six-channel surround sound, and the standard 5.1 channel audio signal includes a center audio signal, a subwoofer audio signal, and other audio signals, and the sub-audio signals include, but are not limited to, the center audio signal and the subwoofer audio signal in the 5.1 channel audio. For example, after the second audio signal is converted into a 5.1-channel audio signal, it is determined that the converted 5.1-channel audio signal lacks audio signals such as a center audio signal and a subwoofer audio signal, and the stereoscopic impression and surround impression of the 5.1-channel audio can be enhanced by supplementing sub-audio such as the center audio signal and the subwoofer audio signal.
In step S223, when the 5.1-channel audio signal does not lack the sub audio signal, the 5.1-channel audio signal is taken as the third audio signal.
After the second system converts the second audio signal into a 5.1-channel audio signal, the second system sends the 5.1-channel audio signal to the digital signal processor, and simultaneously, the first system sends the first audio signal to the digital signal processor, and the digital signal processor determines whether the 5.1-channel audio signal lacks the sub-audio signal by taking the first audio signal as a reference standard. Optionally, when the second system is a closed legacy vehicle-mounted embedded operating system, the digital signal processor deeply analyzes and strips the 5.1-channel audio signal by software processing with a sound source of the first system as a reference standard through a hardware system of the second system, determines whether the 5.1-channel audio signal lacks at least one of a mid-set audio signal and a sub-audio signal such as a subwoofer audio signal, and when the 5.1-channel audio signal lacks at least one of a mid-set audio signal and a sub-audio signal such as a subwoofer audio signal, performs step S222, supplements the mid-set audio signal and the sub-audio signal such as a subwoofer audio signal to the 5.1-channel audio signal, and takes the supplemented 5.1-channel audio signal as the third audio signal; when the 5.1-channel audio signal does not lack at least one of a center audio signal and a subwoofer audio signal, step S223 is performed to treat the 5.1-channel audio signal as the third audio signal.
By utilizing the advantages of the hardware structure of the dual system, for example, when the second system is a traditional vehicle-mounted system, the second system is used for backup, the reliability of audio processing is improved, stereo received by the first system can be converted into 5.1-channel audio signals to be output, and the audio processing of the first system is optimized.
Further, when the in-vehicle system further includes a storage module, the outputting the third audio signal includes: and outputting the third audio signal to the storage module to store the third audio signal. In addition, when the in-vehicle system further includes a speaker, the outputting the third audio signal further includes: and after filtering and amplifying the third audio signal, playing the third audio signal through the loudspeaker. The third audio signal is stored in the storage module, so that the third audio signal can be prevented from being lost due to the halt of the currently running system.
For example, when the user uses the voice navigation function of the vehicle-mounted system, after the first system which is currently running is suddenly halted, the user presses the switching button to switch to the second system running, and since the voice navigation data (i.e. the third audio signal) is stored in the storage module, after the system is switched, the voice navigation data can be still output after the second system is running, so that the user does not need to input information such as a destination route again; or when the user is in communication with others through a communication system of the vehicle-mounted system, after the first system in current operation suddenly crashes, the user presses the switching button to switch to the second system operation, in the process of switching the systems, the words spoken by the user can be stored in the storage module, and after the second system operates, the words spoken by the user in the storage module is sent to another user at a communication end by the second system, so that the other user can hear the words spoken by the user after the first system crashes.
FIG. 6 is a block diagram illustrating an in-vehicle system according to an exemplary embodiment. Referring to fig. 6, the in-vehicle system 600 includes: a first system 610; a second system 620; a digital signal processor 630; and an output module 640.
the first system 610 configured to receive a first audio signal;
the second system 620 configured to receive a second audio signal;
the digital signal processor 630 configured to perform signal processing on the first audio signal and the second audio signal to form a third audio signal; and
The output module 640 is configured to output the third audio signal.
optionally, as shown in fig. 7, the on-board system 600 may further include, in addition to the first system 610, the second system 620, the digital signal processor 630, and the output module 640: a first audio capture module 670; a second audio acquisition module 680; and an analog-to-digital conversion module 690.
The first audio capture module 670, connected to the first system 610, configured to sample external audio to obtain a first analog audio signal;
The second audio collecting module 680, connected to the second system 620, is configured to sample external audio to obtain a second analog audio signal;
the analog-to-digital conversion module 690 is configured to perform analog-to-digital conversion on the first analog audio signal and the second analog audio signal, respectively, so that the first system 610 obtains the first audio signal and the second system 620 obtains the second audio signal.
Alternatively, as shown in fig. 8, the digital signal processor 630 includes: a noise reduction submodule 6301; a comparison submodule 6302; and a processing submodule 6303.
The noise reduction submodule 6301 configured to perform noise reduction processing on the first audio signal and the second audio signal respectively;
The comparison submodule 6302 configured to compare the loss values of the first audio signal and the second audio signal after the noise reduction processing:
The processing submodule 6303 is configured to use, as the third audio signal, an audio signal with a smaller loss value in the first audio signal after the noise reduction processing and the second audio signal after the noise reduction processing.
optionally, the first system 610 is configured to obtain the first audio signal in an external device; as shown in fig. 9, the digital signal processor 630 includes: a conversion submodule 6301 a; and a transmission submodule 6302 a.
The conversion submodule 6301a configured to convert the first audio signal into the second audio signal recognizable by the second system 620;
The transmitting submodule 6302a is configured to transmit the second audio signal to the second system 620.
optionally, the vehicle-mounted system 600 may further include:
A data interface connected to the first system 610, the first system 610 configured to obtain the first audio signal in the external device through the data interface; or
a wireless transmission module connected to the first system 610, wherein the first system 610 is configured to obtain the first audio signal in the external device through the wireless transmission module.
Optionally, the first audio signal is stereo; the second system 620 is further configured to convert the second audio signal into a 5.1-channel audio signal;
as shown in fig. 9, the digital signal processor 630 may further include, in addition to the conversion sub-module 6301a and the transmission sub-module 6302 a: a decision submodule 6303 a; a complement submodule 6304 a; and a processing submodule 6305 a.
The determining submodule 6303a is configured to determine whether the 5.1-channel audio signal lacks a sub-audio signal by using the first audio signal as a reference standard;
the supplement sub module 6304a configured to supplement the sub audio signal to the 5.1-channel audio signal when the sub audio signal is absent from the 5.1-channel audio signal;
The processing submodule 6305a configured to take the supplemented 5.1-channel audio signal as the third audio signal; or when the 5.1-channel audio signal does not lack a sub audio signal, taking the 5.1-channel audio signal as the third audio signal.
Optionally, as shown in fig. 6 and 7, the on-board system 600 may further include: a storage module 650;
The output module 640 is configured to output the third audio signal to the storage module 650.
optionally, as shown in fig. 6 and 7, the on-board system 600 may further include: a speaker 660;
the output module 640 is configured to play the third audio signal through the speaker 660.
With regard to the system in the above embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
it should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
in addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (14)
1. an audio signal processing method of a vehicle-mounted system is characterized in that the vehicle-mounted system comprises a first system and a second system, the first system is an open system connected with the Internet, the second system is a traditional vehicle-mounted system, and the audio signal processing method comprises the following steps:
receiving, by the first system and the second system, a first audio signal and a second audio signal, respectively;
performing signal processing on the first audio signal and the second audio signal to form a third audio signal;
Outputting the third audio signal;
Wherein the signal processing the first audio signal and the second audio signal to form a third audio signal comprises:
Respectively carrying out noise reduction processing on the first audio signal and the second audio signal;
comparing the loss values of the first audio signal and the second audio signal after noise reduction processing;
and taking the audio signal with a smaller loss value in the first audio signal after the noise reduction processing and the second audio signal after the noise reduction processing as the third audio signal.
2. the audio signal processing method according to claim 1, wherein the in-vehicle system further includes a first audio capture module connected to the first system and a second audio capture module connected to the second system;
The receiving, by the first system and the second system, a first audio signal and a second audio signal, respectively, includes:
the first system and the second system respectively sample external audio through the first audio acquisition module and the second audio acquisition module to obtain a first analog audio signal and a second analog audio signal;
And performing analog-to-digital conversion on the first analog audio signal and the second analog audio signal respectively to obtain the first audio signal and the second audio signal.
3. The audio signal processing method according to claim 1,
The receiving, by the first system and the second system, a first audio signal and a second audio signal, respectively, includes:
The first system acquires the first audio signal in an external device;
Converting the first audio signal into the second audio signal recognizable by the second system;
transmitting the second audio signal to the second system.
4. The audio signal processing method of claim 3, wherein the acquiring, by the first system, the first audio signal in an external device comprises:
the first system acquires the first audio signal in the external equipment through a data interface or a wireless transmission mode.
5. The audio signal processing method according to claim 3, wherein the first audio signal is stereo;
after transmitting the second audio signal to the second system, the method further includes:
converting the second audio signal into a 5.1-channel audio signal;
The signal processing the first audio signal and the second audio signal to form a third audio signal includes:
Judging whether the 5.1 channel audio signal lacks a sub-audio signal by taking the first audio signal as a reference standard, wherein the sub-audio signal is at least one of various signals included in the 5.1 channel audio signal;
Supplementing the sub audio signal to the 5.1-channel audio signal when the sub audio signal is absent from the 5.1-channel audio signal, and taking the supplemented 5.1-channel audio signal as the third audio signal;
when the 5.1-channel audio signal does not lack the sub audio signal, the 5.1-channel audio signal is taken as the third audio signal.
6. The audio signal processing method according to claim 1, wherein the in-vehicle system further includes a storage module;
The outputting the third audio signal includes:
and outputting the third audio signal to the storage module.
7. the audio signal processing method of claim 1, wherein the in-vehicle system further comprises a speaker;
The outputting the third audio signal includes:
Playing the third audio signal through the speaker.
8. An in-vehicle system, comprising:
a first system configured to receive a first audio signal, the first system being an open system connected to the internet;
A second system configured to receive a second audio signal, the second system being a conventional in-vehicle system;
A digital signal processor configured to perform signal processing on the first audio signal and the second audio signal to form a third audio signal; and
an output module configured to output the third audio signal;
Wherein the digital signal processor comprises:
a noise reduction sub-module configured to perform noise reduction processing on the first audio signal and the second audio signal, respectively;
a comparison sub-module configured to compare the loss values of the first audio signal and the second audio signal after noise reduction processing:
And the processing submodule is configured to take the audio signal with the smaller loss value in the first audio signal after the noise reduction processing and the second audio signal after the noise reduction processing as the third audio signal.
9. the in-vehicle system of claim 8, further comprising:
A first audio acquisition module connected to the first system and configured to sample external audio to obtain a first analog audio signal;
The second audio acquisition module is connected to the second system and is configured to sample external audio to obtain a second analog audio signal;
An analog-to-digital conversion module configured to perform analog-to-digital conversion on the first analog audio signal and the second analog audio signal, respectively, so that the first system obtains the first audio signal and the second system obtains the second audio signal.
10. The in-vehicle system according to claim 8,
The first system is configured to acquire the first audio signal within an external device;
The digital signal processor includes:
A conversion sub-module configured to convert the first audio signal into the second audio signal recognizable by the second system;
A transmission sub-module configured to transmit the second audio signal to the second system.
11. the in-vehicle system of claim 10, further comprising:
a data interface connected to the first system, the first system configured to obtain the first audio signal in the external device through the data interface; or
a wireless transmission module connected to the first system, wherein the first system is configured to acquire the first audio signal in the external device through the wireless transmission module.
12. the in-vehicle system of claim 10, wherein the first audio signal is stereo;
the second system is further configured to convert the second audio signal into a 5.1-channel audio signal;
The digital signal processor includes:
a determining sub-module configured to determine whether the 5.1-channel audio signal lacks a sub-audio signal with the first audio signal as a reference standard, the sub-audio signal being at least one of a plurality of signals included in the 5.1-channel audio signal;
A supplementary sub-module configured to supplement the center audio and the subwoofer audio to the 5.1-channel audio signal when the sub audio signal is absent from the 5.1-channel audio signal;
a processing sub-module configured to treat the supplemented 5.1-channel audio signal as the third audio signal; or when the 5.1-channel audio signal does not lack the sub audio signal, taking the 5.1-channel audio signal as the third audio signal.
13. The in-vehicle system of claim 8, further comprising: a storage module;
The output module is configured to output the third audio signal to the storage module.
14. The in-vehicle system of claim 8, further comprising: a speaker;
The output module is configured to play the third audio signal through the speaker.
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| CN112235694B (en) * | 2020-12-16 | 2021-03-09 | 智道网联科技(北京)有限公司 | In-vehicle voice processing method and system, electronic device and storage medium |
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| CN203013250U (en) * | 2012-10-31 | 2013-06-19 | 无锡矽鼎科技有限公司 | Vehicle-mounted intelligent audio switching terminal system |
| CN203313260U (en) * | 2013-04-27 | 2013-11-27 | 惠州华阳通用电子有限公司 | Vehicle-borne multimedia terminal for bi-directional communication with mobile phone |
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