CN217770341U - AD 2428W-based vehicle-mounted audio system - Google Patents
AD 2428W-based vehicle-mounted audio system Download PDFInfo
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- CN217770341U CN217770341U CN202221771216.4U CN202221771216U CN217770341U CN 217770341 U CN217770341 U CN 217770341U CN 202221771216 U CN202221771216 U CN 202221771216U CN 217770341 U CN217770341 U CN 217770341U
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Abstract
The utility model discloses a vehicle audio system based on AD2428W, including system level chip SOC, micro control unit MCU, microprocessor DSP, memory cell, vehicle audio bus A2B module, BT module and built-in microphone; the microprocessor DSP module is electrically connected with the BT module, the built-in microphone module, the vehicle-mounted audio bus A2B module, the storage unit and the system level chip SOC; the micro control unit MCU is electrically connected with the vehicle-mounted audio bus A2B module and the system level chip SOC; the utility model discloses can reduce vehicle cable quantity, eliminate the risk that analog signal is disturbed by outside electron portion article, for vehicle manufacturer reduce cost, reduce vehicle weight, bring better driving experience for the user.
Description
Technical Field
The utility model relates to an automotive electronics technical field, in particular to on-vehicle audio system based on AD 2428W.
Background
At present, the cable of the automobile audio system accounts for a large proportion of the total cable weight, because the analog line requires that shielding cables with high price are adopted from an audio source to a terminal (loudspeaker); in addition, as technology advances and consumption levels increase, users have higher requirements on audio quality and driving experience, some noise reduction or cancellation systems have become standard for high-end vehicle models, and active noise reduction (ANC) or road noise Reduction (RNC) systems require multiple microphones to be installed in a vehicle, which also increases many input nodes for an audio network, and meanwhile, long-distance transmission of analog signals is easily interfered by external electronic components. In the prior art, an A2B technology is not used, a microphone array needs 12 wiring harnesses to be connected with an audio system, and an external power amplifier needs 8 wiring harnesses to be connected with the audio system; excessive audio wiring harness, resulting in increased vehicle weight; when a plurality of analog audios (microphones) are input, the DSP analog input interface is insufficient.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the prior art defect, providing a vehicle audio system based on AD2428W, can reduce vehicle cable quantity, eliminate the risk that analog signal is disturbed by outside electronics portion article, for vehicle manufacturer reduce cost, reduction vehicle weight, bring better driving experience for the user.
The purpose of the utility model is realized like this: a vehicle-mounted audio system based on AD2428W comprises a system level chip SOC, a Micro Control Unit (MCU), a microprocessor (DSP), a storage unit, a vehicle-mounted audio bus A2B module, a BT module and a built-in microphone;
the system level chip SOC is used for operating an android system, initializing the DSP and BT modules of the microprocessor and managing related functions of the DSP and BT modules of the microprocessor;
the MCU is used for managing a system power supply, initializing a vehicle-mounted audio bus A2B module and communicating with the SOC;
the microprocessor DSP is used for processing system audio and receiving an input signal of a built-in microphone;
the storage unit is used for storing a starting file of the DSP of the microprocessor;
the vehicle-mounted audio bus A2B module is used for receiving and transmitting A2B bus data and carrying out audio data transmission with a microphone and an external power amplifier through an A2B bus;
the BT module is used for transmitting the Bluetooth music to the System On Chip (SOC) and transmitting the Bluetooth voice information to the microprocessor DSP so as to realize the Bluetooth music and Bluetooth voice functions;
the built-in microphone is used for picking up an audio signal and transmitting the audio signal to the DSP through the ADC 1;
the DSP module of the microprocessor is electrically connected with the BT module, the built-in microphone module, the vehicle-mounted audio bus A2B module, the storage unit and the system level chip SOC; and the micro control unit MCU is electrically connected with the vehicle-mounted audio bus A2B module and the system-on-chip SOC.
The utility model discloses the during operation adopts ADI's vehicle audio bus (A2B) AD2428W chip to realize audio transmission, and the audio signal that microprocessor DSP exported in this system sends to the A2B bus through AD2428W conversion, and microprocessor DSP obtains on the A2B bus through AD2428W simultaneously and comes from microphone array in the microphone signal, comes from the audio signal after power amplifier handles in the external power amplifier; A2B chip sends a microphone signal to an A2B bus in the microphone array, the A2B chip obtains an audio signal sent by the system on the A2B bus in the external power amplifier, the audio signal is sent to a loudspeaker set after being processed by a power amplifier in the external power amplifier, and the audio signal sent by the external power amplifier is converted into sound waves by a loudspeaker in the loudspeaker set.
Further, the vehicle-mounted audio bus A2B module is electrically connected with a microphone array with a built-in A2B chip through an A2B bus; the microphone array is used for picking up audio signals and transmitting the audio signals to an A2B bus and a vehicle-mounted audio bus A2B module for transmitting the A2B bus and audio information of an external power amplifier;
further, the microphone array is electrically connected with an external power amplifier of an internal A2B chip through an A2B bus; the external power amplifier is used for amplifying the audio signal and transmitting the amplified audio signal to the A2B bus.
Further, the external power amplifier is connected with the loudspeaker set through four groups of twisted-pair lines; the loudspeaker set is used for converting an electric signal into sound waves.
Further, the microprocessor DSP is electrically connected with the system level chip SOC through an IIS bus; the microprocessor DSP is electrically connected with the BT module through a PCM bus; the microprocessor DSP is electrically connected with the vehicle-mounted audio bus A2B module through a TMD bus; the microprocessor DSP is electrically connected with the storage unit through an SPI2 serial port; the vehicle-mounted audio bus A2B module is electrically connected with the MCU through the IIC bus; and the micro control unit MCU is electrically connected with the system chip SOC through a UART serial port.
Further, the microprocessor DSP adopts an SAF7771 chip.
Further, the system on chip SOC adopts a PMM-8155AU chip.
Further, the micro control unit MCU adopts an FS32K146 chip.
The utility model adopts the above technical scheme, compare with prior art, beneficial effect is: by using an A2B bus technology (digital signal transmission), the problem that an analog audio signal is easily interfered can be effectively solved; the problem of insufficient DSP analog input interface when a plurality of microphones are input is solved; the audio signal transmission function is realized by only using 2 groups of twisted pairs (4 wire harnesses), and the problem of weight increase caused by excessive audio wire harnesses is solved. The vehicle-mounted audio system with the vehicle-mounted audio bus A2B module can reduce the number of vehicle cables, eliminate the risk of interference of analog signals by external electronic parts, reduce the cost and the weight of a vehicle manufacturer, and bring better driving experience for users.
Drawings
Fig. 1 the system of the present invention is a block diagram.
Fig. 2 is a logic diagram of the functional module of the present invention.
Detailed Description
1-2, the vehicle audio system based on AD2428W comprises a system on chip SOC, a micro control unit MCU, a microprocessor DSP, a storage unit, a vehicle audio bus A2B module, a BT module and a built-in microphone;
the system level chip SOC is used for operating an android system, initializing the DSP and BT modules of the microprocessor and managing related functions of the DSP and BT modules of the microprocessor; the system level chip SOC adopts a PMM-8155AU chip.
The micro control unit MCU is used for managing a system power supply, initializing the A2B module of the vehicle-mounted audio bus and communicating with the system level chip SOC; the micro control unit MCU adopts an FS32K146 chip.
The microprocessor DSP is used for processing the system audio and receiving an input signal of a built-in microphone; the microprocessor DSP adopts an SAF7771 chip.
The storage unit is used for storing a starting file of the DSP of the microprocessor;
the vehicle-mounted audio bus A2B module is used for receiving and transmitting A2B bus data and carrying out audio data transmission with a microphone and an external power amplifier through the A2B bus; the A2B module of the car audio bus adopts an ADI A2B chip (AD 2428W).
The BT module is used for transmitting the Bluetooth music to the system on chip SOC and transmitting the Bluetooth voice information to the microprocessor DSP, so that the Bluetooth music and Bluetooth voice functions are realized.
The built-in microphone is used for picking up an audio signal and transmitting the audio signal to the microprocessor DSP through the ADC 1.
The vehicle-mounted audio bus A2B module is electrically connected with a microphone array with a built-in A2B chip (AD 2428W) through an A2B bus; the microphone array is used to pick up audio signals and transmit them to the A2B bus and other node information that conveys the A2B bus.
The microphone array is electrically connected with an external power amplifier of a built-in A2B chip (AD 2428W) through an A2B bus; the external power amplifier is used for amplifying the audio signal and transmitting the amplified audio signal to the A2B bus.
The external power amplifier is connected with the loudspeaker set through four twisted-pair lines; the loudspeaker set is used for converting the electric signals into sound waves.
The microprocessor DSP is electrically connected with the system level chip SOC through an IIS bus; the microprocessor DSP is electrically connected with the BT module through a PCM bus; the microprocessor DSP is electrically connected with the vehicle-mounted audio bus A2B module through a TMD bus; the microprocessor DSP is electrically connected with the storage unit through an SPI2 serial port; the vehicle-mounted audio bus A2B module is electrically connected with the MCU through the IIC bus; and the micro control unit MCU is electrically connected with the system chip SOC through a UART serial port.
When the utility model works and the system is started, the micro control unit MCU opens the power supplies of other modules in the dotted line frame of figure 2, and initializes the AD2428W chip in the vehicle audio bus A2B module through the IIC after the power supplies of other modules are stabilized;
initializing after a system level chip SOC power supply is turned on, configuring a microprocessor DSP through an SPI1 after the initialization is finished, and feeding back the state of the system level chip SOC to a micro control unit MCU through the UART 1;
after the DSP and the storage unit of the microprocessor are powered on, the microprocessor reads the initialization parameters stored in the storage unit, and after the initialization is finished, audio transmission can be carried out through the IIS and the SOC; the storage unit stores initial configuration parameters of the DSP of the microprocessor;
after the power supply of the vehicle-mounted audio bus A2B module is turned on, the micro control unit MCU initializes and configures the vehicle-mounted audio bus A2B module, after the initialization of the vehicle-mounted audio bus A2B module is completed, audio data transmission is carried out through TDM and a microprocessor DSP, and audio data transmission is carried out through the A2B bus, a microphone array and an external power amplifier; when the active noise reduction function is used, the vehicle-mounted audio bus A2B module acquires an environmental noise signal acquired by a microphone array, and simultaneously acquires an audio signal amplified by a power amplifier in an external power amplifier, and the audio signal is processed (noise is extracted and reversed) by the vehicle-mounted audio bus A2B module and then superposed on a played audio signal;
after the BT module is powered on, the SOC controls the working state of the BT module through an EN/WAKE signal, the BT module transmits a Bluetooth music signal through UART2 and transmits a Bluetooth communication signal through PCM;
the built-in microphone transmits a user voice signal to the microprocessor DSP through the ADC1 when the BT module is in a call, the microprocessor DSP converts an analog signal into a digital signal after receiving the voice signal, the microprocessor DSP sends the voice digital signal to the BT module through the PCM, and the BT module sends the received voice digital signal to the mobile phone through the antenna;
the A2B chip in the microphone array transmits 4 pieces of microphone data to the A2B module of the vehicle-mounted audio bus through an A2B bus, and simultaneously, the data is used as a relay, and the audio data in the A2B module of the vehicle-mounted audio bus is transmitted to the external power amplifier of the next node through the A2B bus;
an A2B chip in the external power amplifier acquires an audio signal to be amplified and sends the audio signal to the power amplifier chip, meanwhile, the audio signal at the rear end of the power amplifier is collected and subjected to A/D conversion, and then the audio signal is transmitted to a microprocessor DSP through an A2B bus and TDM, the microprocessor DSP processes the audio signal fed back by the power amplifier and the environmental noise collected by a microphone array through a specific algorithm, and an active noise reduction (ANC) function is realized; the loudspeaker in the loudspeaker set converts the electric signal sent by the external power amplifier into a sound signal.
The present invention is not limited to the above embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some replacements and transformations for some technical features without creative labor according to the disclosed technical contents, and these replacements and transformations are all within the protection scope of the present invention.
Claims (8)
1. A vehicle-mounted audio system based on AD2428W is characterized by comprising a system level chip SOC, a micro control unit MCU, a microprocessor DSP, a storage unit, a vehicle-mounted audio bus A2B module, a BT module and a built-in microphone;
the system level chip SOC is used for operating an android system, initializing the DSP and BT modules of the microprocessor and managing related functions of the DSP and BT modules of the microprocessor;
the MCU is used for managing a system power supply, initializing a vehicle-mounted audio bus A2B module and communicating with the SOC;
the microprocessor DSP is used for processing system audio and receiving an input signal of a built-in microphone;
the storage unit is used for storing a starting file of the DSP of the microprocessor;
the vehicle-mounted audio bus A2B module is used for receiving and transmitting A2B bus data and carrying out audio data transmission with a microphone and an external power amplifier through the A2B bus;
the BT module is used for transmitting the Bluetooth music to the system on chip SOC and transmitting the Bluetooth voice information to the microprocessor DSP, so that the Bluetooth music and Bluetooth voice functions are realized;
the built-in microphone is used for picking up an audio signal and transmitting the audio signal to the microprocessor DSP through the ADC 1;
the DSP module of the microprocessor is electrically connected with the BT module, the built-in microphone module, the vehicle-mounted audio bus A2B module, the storage unit and the system level chip SOC; and the micro control unit MCU is electrically connected with the vehicle-mounted audio bus A2B module and the system level chip SOC.
2. The AD 2428W-based vehicle audio system according to claim 1, wherein the vehicle audio bus A2B module is electrically connected with a microphone array with a built-in A2B chip through an A2B bus; the microphone array is used for picking up audio signals and transmitting the audio signals to an A2B bus and audio information of a vehicle-mounted audio bus A2B module and an external power amplifier for transmitting the A2B bus.
3. The AD 2428W-based vehicle-mounted audio system according to claim 2, wherein the microphone array is electrically connected with an external power amplifier of an internal A2B chip through an A2B bus; the external power amplifier is used for amplifying the audio signal and transmitting the amplified audio signal to the A2B bus.
4. The AD 2428W-based vehicle audio system according to claim 3, wherein the external power amplifier is connected with a loudspeaker set through four groups of twisted-pair wires; the loudspeaker set is used for converting an electric signal into sound waves.
5. The AD2428W based vehicle audio system as claimed in claim 1, wherein the microprocessor DSP is electrically connected with the SOC through an IIS bus; the microprocessor DSP is electrically connected with the BT module through a PCM bus; the microprocessor DSP is electrically connected with the vehicle-mounted audio bus A2B module through a TMD bus; the microprocessor DSP is electrically connected with the storage unit through the SPI2 serial port; the vehicle-mounted audio bus A2B module is electrically connected with the MCU through the IIC bus; and the micro control unit MCU is electrically connected with the system level chip SOC through a UART serial port.
6. The AD2428W based vehicle audio system according to claim 1, wherein the microprocessor DSP adopts a SAF7771 chip.
7. The AD 2428W-based vehicle audio system of claim 1, wherein the system-on-chip SOC employs a PMM-8155AU chip.
8. The AD2428W based vehicle audio system according to claim 1, wherein the MCU adopts an FS32K146 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221771216.4U CN217770341U (en) | 2022-07-11 | 2022-07-11 | AD 2428W-based vehicle-mounted audio system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221771216.4U CN217770341U (en) | 2022-07-11 | 2022-07-11 | AD 2428W-based vehicle-mounted audio system |
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| CN217770341U true CN217770341U (en) | 2022-11-08 |
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| CN202221771216.4U Active CN217770341U (en) | 2022-07-11 | 2022-07-11 | AD 2428W-based vehicle-mounted audio system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116709282A (en) * | 2023-06-20 | 2023-09-05 | 河北初光汽车部件有限公司 | Automobile Bluetooth audio system capable of being conveniently disassembled and assembled |
| CN116709282B (en) * | 2023-06-20 | 2024-05-24 | 河北初光汽车部件有限公司 | Automobile Bluetooth audio system capable of being conveniently disassembled and assembled |
-
2022
- 2022-07-11 CN CN202221771216.4U patent/CN217770341U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116709282A (en) * | 2023-06-20 | 2023-09-05 | 河北初光汽车部件有限公司 | Automobile Bluetooth audio system capable of being conveniently disassembled and assembled |
| CN116709282B (en) * | 2023-06-20 | 2024-05-24 | 河北初光汽车部件有限公司 | Automobile Bluetooth audio system capable of being conveniently disassembled and assembled |
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