CN215933190U - Voice recognition system based on vehicle-mounted intelligent network connection - Google Patents
Voice recognition system based on vehicle-mounted intelligent network connection Download PDFInfo
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- CN215933190U CN215933190U CN202122346580.8U CN202122346580U CN215933190U CN 215933190 U CN215933190 U CN 215933190U CN 202122346580 U CN202122346580 U CN 202122346580U CN 215933190 U CN215933190 U CN 215933190U
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Abstract
The utility model discloses a voice recognition system based on vehicle-mounted intelligent network connection, which comprises a display touch module, a double MIC module, an SOC control core module, a DSP audio processing module, an APM power amplification module, an MCU control module and a 4G communication module. The voice recognition system can filter noise and eliminate echo in the driving process, so that the instruction of the driver is accurately and effectively analyzed and executed by the system, the driver legal identity is recognized by the unique voiceprint recognition function, the driving safety is ensured, and the monitoring is convenient.
Description
Technical Field
The utility model relates to the field of automobile electronic intelligent network connection, in particular to a voice recognition system based on vehicle-mounted intelligent network connection.
Background
The application of speech recognition systems can be divided into two development directions: one direction is a large vocabulary continuous speech recognition system, which is mainly applied to dictation machines of computers and speech information inquiry service systems combined with telephone networks or the Internet, and the systems are all realized on computer platforms.
Another important development direction is the Application of miniaturized and portable voice products, such as dialing in wireless mobile phones, voice control of car devices, intelligent toys, remote control of home appliances, etc., and most of these Application systems are implemented by using special third-party software, especially the appearance of Application Specific Integrated Circuits (ASICs) and systems on a voice recognition Chip (SOC) which have been rapidly developed in recent years.
In the global vehicle-mounted intelligent cabin driving era, a vehicle-mounted voice control technology is very critical to a cabin driving, various interference sounds including engine noise, windowing wind sound, passenger talking sound and the like exist in a vehicle, the voice recognition effect is influenced, and the cabin driving cannot accurately recognize instructions of a driver.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provides a voice recognition system based on vehicle-mounted intelligent network connection, which can recognize the legality of a driver, ensure safe driving and avoid and reduce accidents.
The purpose of the utility model is realized as follows: a voice recognition system based on vehicle-mounted intelligent network connection comprises a display touch module, a double MIC module, an SOC control core module, a DSP audio processing module, an APM power amplification module, an MCU control module and a 4G communication module;
the display touch module is used for driving liquid crystal display to complete interactive information display and touch coordinate information return;
the double MIC modules are used for completing the input of voice original sound and background reference sound;
the SOC control core module is used for outputting a human-computer interaction UI display video signal, controlling the DSP audio processing module to finish audio processing functions of noise reduction, echo cancellation and the like, communicating vehicle body control information with a serial port of the MCU control module, and communicating with the 4G communication module to realize network information interaction;
the DSP audio processing module is used for receiving voice signal input of the double MIC modules, is matched with the SOC control core module to realize DSP control, and outputs audio to the AMP power amplification module to finish output;
the AMP power amplification module is used for completing the function of amplifying the power of the audio output signal;
the MCU control module is used for receiving the real vehicle control signal, interacting relevant information with the SOC control core module after arrangement, and controlling the AMP power amplification module to finish the functions of output power amplifier standby and enabling.
When the system works, the dual MIC modules respectively record the original voice of a driver and the background reference voice and input the original voice and the background reference voice into the DSP audio processing module, the DSP audio processing module performs noise reduction after sampling an input original voice signal, performs echo cancellation processing to obtain a digital signal and an analog signal, and transmits the processed digital signal to the SOC control core module for local voice recognition; when the 4G communication module has a wireless signal, the local voice recognition engine is linked with the network voice recognition library to provide related intelligent network connection voice service; the DSP audio processing module outputs the analog signal to the rear-end APM power amplification module, and then the audio is played to the vehicle body loudspeaker through the APM power amplification module.
By adopting the technical scheme, compared with the prior art, the utility model has the beneficial effects that: noise filtering and echo eliminating are carried out through the DSP audio processing module in the driving process, so that the instruction of a driver is accurately and effectively analyzed and executed by the system; through 4G communication module, local pronunciation are discerned to SOC control core module to link local pronunciation and network speech recognition storehouse, provide relevant intelligent networking speech service, greatly improve speech recognition rate, only voiceprint recognition function discerns the legal identity of driver, ensures driving safety, the supervision of being convenient for.
In order to better process sound and voice at the same time, the DSP audio processing module comprises an echo eliminating unit and an audio noise reducing unit.
In order to keep the original sound input and avoid the deviation of identification, the dual MIC module comprises two electret microphones, and the installation distance of the two electret microphones is 5 cm.
In order to better perform local voice recognition, the SOC control core module adopts an i.MX8QM chip.
Furthermore, the SOC control core module is electrically connected with the display touch module, the DSP audio processing module, the MCU control module and the 4G communication module.
Furthermore, the MCU control module is electrically connected with the SOC control core module and the AMP power amplification module, and is also connected with the real vehicle controller.
Further, the DSP audio processing module is electrically connected with the double MIC module and the AMP power amplifying module.
Furthermore, the APM power amplification module is also connected with a real vehicle loudspeaker.
Drawings
FIG. 1 is a block diagram of the system of the present invention.
Fig. 2 is a schematic diagram of the inventive circuit.
FIG. 3 is a block diagram of a speech recognition system for intelligent networking according to the present invention.
Detailed Description
The voice recognition system based on the vehicle-mounted intelligent network connection shown in the figure 1-2 can recognize the legality of a driver, ensure safe driving and avoid and reduce accidents.
The purpose of the utility model is realized as follows: a voice recognition system based on vehicle-mounted intelligent internet comprises a display touch module, two MIC modules, an SOC control core module, a DSP audio processing module, an APM power amplification module, an MCU control module and a 4G communication module.
The display touch module is electrically connected with the SOC control core module and used for driving liquid crystal display to complete interactive information display and touch coordinate information return.
The double MIC modules are electrically connected with the DSP audio processing module and are used for completing the input of the original voice and the background reference voice.
The SOC control core module is electrically connected with the display touch module, the DSP audio processing module, the MCU control module and the 4G communication module and used for finishing system core control, wherein the system core control comprises human-computer interaction UI display video signal output, controls the DSP audio processing module to finish audio processing functions of noise reduction, echo cancellation and the like, communicates vehicle body control information with a serial port of the MCU control module and communicates with the 4G communication module to realize network information interaction; the SOC control core module adopts an i.MX8QM chip.
The DSP audio processing module is electrically connected with the double MIC modules, the SOC control core module and the AMP power amplification module, is used for receiving the voice signal input of the double MIC modules, is matched with the SOC control core module to realize DSP control, and outputs audio to the AMP power amplification module to finish output.
The AMP power amplification module is electrically connected with the DSP audio processing module and is used for completing the function of amplifying the power of the audio output signal; the AMP power amplification module is also connected with the real vehicle loudspeaker.
The MCU control module is connected with the SOC control core, the AMP power amplification module and the real vehicle controller and used for receiving real vehicle control signals, interacting relevant information with the SOC control core module after arrangement and controlling the AMP power amplification module to finish the standby and enabling functions of output power amplification, and the MCU control module adopts an NXP S32K144 chip.
The DSP audio processing module comprises an echo eliminating unit and an audio noise reducing unit, the DSP audio processing module adopts an NXP SAF775D chip, the DSP audio processing module further comprises a 24-bit stereo power Amplifier (ADC) with a microphone gain, the 24-bit stereo power amplifier ADC with an input selector, two 32-bit stereo digital audio processors (DAC), 4 stereo and 4 mono Sampling Rate Converters (SRC), and the DSP1 and the DSP2 support sampling frequency below 192kHz and two DSPs, have parallel processing capacity, can process sound and voice at the same time and are used for a hands-free function, and the two DSPs can respectively and independently work under synchronous sampling frequency.
The double MIC module comprises two phi 6 electret microphones, the sensitivity is-38 dB +/-2 dB, the signal-to-noise ratio is 65dB, the directivity is full, the noise is not reduced, the installation distance of the two electret microphones is 5cm, the original sound input is kept, and the recognition deviation is avoided.
When the utility model works, as shown in fig. 3, the dual MIC modules (main recognition MIC1, environmental sound MIC 2) respectively record the driver's original voice and the background reference sound and input the same into the DSP audio processing module, the DSP audio processing module performs echo cancellation processing through the echo cancellation unit, the sound emitted by the car body speaker also enters the MIC loop at the same time, in order to avoid the interference of the effective voice signal, the echo cancellation unit processes the signal through the adaptive filter to obtain a signal without echo, that is, the effective original voice information input by the microphone, the audio noise reduction unit in the DSP audio processing module performs noise reduction processing on the original voice information, and the DSP audio processing module transmits the processed digital signal to the SOC control core module for local voice recognition; when the 4G communication module has a wireless signal, the local voice recognition unit is linked with the network voice recognition library to provide related intelligent network connection voice service; the DSP audio processing module outputs the analog signal to a rear-end APM power amplification module through a digital audio processor (DAC), and then the audio is played to a vehicle body loudspeaker through the APM power amplification module.
The intelligent internet voice service is used for creating user experience, knowing vehicle owner preference, meeting personalized entertainment requirements and executing complex commands according to real-time conditions. For example, the system can help the owner to find nearby gas stations, provide price comparison information of surrounding gas stations and guide the owner to a nearest comfortable path of a destination; playing songs recently liked by the user; turning up the volume when the user needs to hear the voice and muting the voice when the user does not need the voice; cloud speech recognition of various voices with cavity tones, such as Indian cavity English, Sichuan cavity Chinese and the like; the unique voiceprint recognition function is realized, the legal identity of a driver is recognized through the Internet, the driving safety is ensured, and the monitoring is facilitated.
Under the condition of 70 yards per hour in the real vehicle test, the skylight, the door window is all opened, and the host computer plays high volume music, and the passenger in the car talks at will, still can 100% discernment pronunciation.
The present invention is not limited to the above-mentioned embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and modifications to some technical features without creative efforts according to the disclosed technical contents, and these substitutions and modifications are all within the protection scope of the present invention.
Claims (8)
1. A voice recognition system based on vehicle-mounted intelligent network connection is characterized by comprising a display touch module, a double MIC module, an SOC control core module, a DSP audio processing module, an APM power amplification module, an MCU control module and a 4G communication module;
the display touch module is used for driving liquid crystal display to complete interactive information display and touch coordinate information return;
the double MIC modules are used for completing the input of voice original sound and background reference sound;
the SOC control core module is used for outputting a display video signal of a human-computer interaction UI, controlling the DSP audio processing module to finish the audio processing functions of noise reduction and echo cancellation, communicating vehicle body control information with the MCU control module serial port, and communicating with the 4G communication module to realize network information interaction;
the DSP audio processing module is used for receiving voice signal input of the double MIC modules, is matched with the SOC control core module to realize DSP control, and outputs audio to the AMP power amplification module to finish output;
the AMP power amplification module is used for completing the function of amplifying the power of the audio output signal;
the MCU control module is used for receiving the real vehicle control signal, interacting relevant information with the SOC control core module after arrangement, and controlling the AMP power amplification module to finish the functions of output power amplifier standby and enabling.
2. The vehicle-mounted intelligent networking-based voice recognition system of claim 1, wherein the SOC control core module is electrically connected with the display touch module, the DSP audio processing module, the MCU control module and the 4G communication module.
3. The vehicle-mounted intelligent networking-based voice recognition system according to claim 1, wherein the MCU control module is electrically connected with the SOC control core module and the AMP power amplification module, and is further connected with a real-time controller.
4. The vehicle-mounted intelligent networking-based voice recognition system of claim 1, wherein the DSP audio processing module is electrically connected with the dual MIC module and the AMP power amplification module.
5. The vehicle-mounted intelligent networking-based voice recognition system according to claim 1 or 4, wherein the DSP audio processing module comprises an echo cancellation unit and an audio noise reduction unit.
6. The vehicle-mounted intelligent networking-based voice recognition system of claim 1, wherein the dual MIC modules comprise two electret microphones, and the two electret microphones are installed at a distance of 5 cm.
7. The vehicle-mounted intelligent networking-based voice recognition system of claim 1, wherein the APM power amplification module is further connected with a real vehicle speaker.
8. The vehicle-mounted intelligent networking-based voice recognition system of claim 1, wherein the SOC control core module adopts an i.mx8qm chip.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122346580.8U CN215933190U (en) | 2021-09-27 | 2021-09-27 | Voice recognition system based on vehicle-mounted intelligent network connection |
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| CN202122346580.8U CN215933190U (en) | 2021-09-27 | 2021-09-27 | Voice recognition system based on vehicle-mounted intelligent network connection |
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| CN215933190U true CN215933190U (en) | 2022-03-01 |
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