CN214412877U - Vehicle-mounted multi-channel audio and video switcher - Google Patents
Vehicle-mounted multi-channel audio and video switcher Download PDFInfo
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- CN214412877U CN214412877U CN202022544182.2U CN202022544182U CN214412877U CN 214412877 U CN214412877 U CN 214412877U CN 202022544182 U CN202022544182 U CN 202022544182U CN 214412877 U CN214412877 U CN 214412877U
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Abstract
The utility model discloses a vehicle-mounted multi-channel audio/video switcher, which comprises a video driving circuit, an audio processing circuit, a processor, a decoding circuit connected with the processor, a multi-channel audio switching circuit, an audio processing circuit, a multi-channel volume control circuit, a key circuit, a display screen and a digital trigger signal circuit, wherein the decoding circuit is provided with a plurality of external storage device input interfaces, the decoding circuit is connected with a video output interface through the video driving circuit, the audio output end of the decoding circuit is connected with the multi-channel audio switching circuit, the multi-channel audio switching circuit is provided with a plurality of external audio input interfaces, one output end of the multi-channel audio switching circuit is connected with the input end of the audio processing circuit through the audio processing circuit, the other output end of the multi-channel volume control circuit is connected with the audio output interface through the audio processing circuit, the multi-channel volume control circuit is also provided with a microphone input interface, and the output end of the digital trigger signal circuit is connected with the digital signal output interface.
Description
Technical Field
The utility model belongs to audio video control field specifically relates to an on-vehicle multichannel audio video switch.
Background
With the continuous improvement of living standard, the popularization rate of automobiles is higher and higher, so the requirement of consumers on the automobiles is higher and higher. In order to improve the use experience of the automobile, the types of audio and video products on the automobile are increasing, and products such as a camera, a DVD, a TV, a radio, a microphone and the like are widely applied to the automobile. Due to the diversity of audio and video products on the vehicle, the number of the displays and the power amplifiers of the vehicle is limited, and the distribution of the loudspeakers in the vehicle is relatively fixed, so that the phenomenon that a plurality of audio and video signals need to share one display or one loudspeaker is caused, the use is disordered, the use effect is influenced, and the use experience is reduced.
Disclosure of Invention
An object of the utility model is to provide an on-vehicle multichannel audio frequency and video switch is used for solving the technical problem that above-mentioned exists.
In order to achieve the above object, the utility model adopts the following technical scheme: a vehicle-mounted multi-channel audio/video switcher comprises a decoding circuit, a video driving circuit, a multi-channel audio switching circuit, a sound effect processing circuit, a multi-channel volume control circuit, an audio processing circuit, a processor, a key circuit, a display screen and a digital trigger signal circuit, wherein the decoding circuit is provided with a plurality of external storage device input interfaces, a video output end of the decoding circuit is connected with a video output interface through the video driving circuit, an audio output end of the decoding circuit is connected with an input end of the multi-channel audio switching circuit, the multi-channel audio switching circuit is provided with a plurality of external audio input interfaces, one path of an output end of the multi-channel audio switching circuit is connected with the input end of the audio processing circuit through the sound effect processing circuit, the other path of the output end of the multi-channel volume control circuit is connected with the input end of the audio processing circuit, and an output end of the audio processing circuit is connected with the audio output interface, the multichannel volume control circuit is also provided with a microphone input interface, the decoding circuit, the multi-channel audio switching circuit, the sound effect processing circuit, the multichannel volume control circuit, the key circuit, the display screen and the digital trigger signal circuit are respectively connected with the processor, and the output end of the digital trigger signal circuit is connected with the digital signal output interface.
Furthermore, the device also comprises an alarm sound circuit, wherein the control end of the alarm sound circuit is connected with the processor, and the output end of the alarm sound circuit is connected with the input end of the multi-channel volume control circuit.
Furthermore, the intelligent control system also comprises a CAN communication circuit, and the CAN communication circuit is connected with the processor.
Furthermore, the multi-channel audio switching circuit further comprises a wireless communication unit, the wireless communication unit is in communication connection with the processor, and an audio output end of the wireless communication unit is connected with an input end of the multi-channel audio switching circuit.
Further, the wireless communication unit is a bluetooth communication unit.
Furthermore, the digital trigger circuit further comprises a feedback circuit, and the feedback circuit is used for feeding back the signal output by the output end of the digital trigger signal circuit to the processor.
Further, the plurality of external storage device input interfaces of the decoding circuit comprise a USB input interface and an SD card input interface.
Further, the microphone input interface includes a driver microphone input interface and a guide microphone input interface.
Furthermore, the microphone input interface is compatible with a condenser microphone and a moving-coil microphone.
Further, the decoding circuit is in serial port communication connection with the processor.
Further, the display screen is an OLED display screen driven by an SSD1322 chip.
The utility model has the advantages of:
the utility model discloses can realize more rationally distributing display and speaker on the car with a plurality of audio and video equipment signals on the car, improve the result of use to improve and use experience and feel.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a block diagram of a circuit structure according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a radio input interface (external audio input interface) according to an embodiment of the present invention;
fig. 3 is a circuit diagram of a DVD input interface (external audio input interface) according to an embodiment of the present invention;
fig. 4 is a circuit diagram of two external audio input interfaces according to an embodiment of the present invention;
fig. 5 is a circuit diagram of a TV input interface (external audio input interface) according to an embodiment of the present invention;
fig. 6 is a circuit diagram of a bluetooth communication unit according to an embodiment of the present invention;
fig. 7 is a circuit diagram of a microphone input interface according to an embodiment of the present invention;
fig. 8 is a circuit diagram of a multi-channel audio switching circuit according to an embodiment of the present invention;
FIG. 9 is a circuit diagram of a sound effect processing circuit according to an embodiment of the present invention
Fig. 10 is a circuit diagram of a multi-channel volume control circuit according to an embodiment of the present invention;
fig. 11 is a circuit diagram of an audio processing circuit according to an embodiment of the present invention;
fig. 12 is a circuit diagram of a decoding circuit according to an embodiment of the present invention;
fig. 13 is a circuit diagram of a CAN communication circuit according to an embodiment of the present invention;
fig. 14 is a circuit diagram of a display screen according to an embodiment of the present invention;
fig. 15 is a circuit diagram of a digital signal output interface according to an embodiment of the present invention;
fig. 16 is a circuit diagram of an audio output interface according to an embodiment of the present invention;
fig. 17 is a circuit diagram of a processor according to an embodiment of the present invention.
Detailed Description
To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments.
The present invention will now be further described with reference to the accompanying drawings and detailed description.
As shown in fig. 1, a vehicle-mounted multi-channel audio/video switcher includes a decoding circuit 1, a video driving circuit 2, a multi-channel audio switching circuit 4, an audio processing circuit 5, a multi-channel volume control circuit 6, an audio processing circuit 7, a processor 11, a key circuit 12, a display screen 13 and a digital trigger signal circuit 10, wherein the decoding circuit 1, the multi-channel audio switching circuit 4, the audio processing circuit 5, the multi-channel volume control circuit 6, the key circuit 12, the display screen 13 and the digital trigger signal circuit 10 are respectively connected with the processor 11, and the processor 11 controls the multi-channel audio/video switcher to work correspondingly according to the selection condition of a user.
The decoding circuit 1 has a plurality of external storage device input interfaces, in this embodiment, the external storage device input interfaces include a USB input interface 17 and an SD card input interface 18, support external USB and SD cards, and are used to read audio files, video files, pictures, and the like of the external USB and SD cards.
In this embodiment, the decoding circuit 1 employs an AC8327 decoding chip, which at least supports 2-way USB input, 1-way SD card input, 2-way stereo audio output, CVBS video output, LVDS video output, HDMI video output, YPBPR video output, and other functions. Of course, in other embodiments, the decoding circuit 1 may also be implemented by using other existing decoding chips.
In this embodiment, the decoding circuit 1 and the processor 11 adopt serial communication, so that transmission is more reliable.
The video output end of the decoding circuit 1 is connected with a video output interface 3 through a video driving circuit 2, and the video output interface 3 is used for receiving a display on a vehicle, so that videos and pictures of external USB and SD cards are played on the display on the vehicle.
The audio output end of the decoding circuit 1 is connected with an input end of the multi-channel audio switching circuit 4, the multi-channel audio switching circuit 4 is provided with a plurality of external audio input interfaces 20, one channel of the output end of the multi-channel audio switching circuit 4 is connected with an input end of the audio processing circuit 7 through the sound effect processing circuit 5, and the other channel is connected with an input end of the multi-channel volume control circuit 6. In this embodiment, the multi-channel audio switching circuit 4 is an 8-channel differential input audio switching circuit, and is implemented by using a chip of the model SGM6513, and the SGM6513 chip is a high-speed monolithic analog multiplexer composed of 8 differential channels, and switches one of 8 differential inputs to a common differential output. In other embodiments, the multi-channel audio switching circuit 4 may also be an audio switching circuit with more than 8 or less than 8 inputs.
In this embodiment, the number of the external audio input interfaces 20 is 5, which is used for receiving various external audios, such as external audios of DVD, radio, etc., in other embodiments, the number of the external audio input interfaces 20 may be set according to actual needs.
In this embodiment, the volume control of the multi-channel volume control circuit 6 is implemented by using a BD3460FS chip, and the BD3460FS chip is a 6-channel electronic volume control chip, which has the best audio efficiency in the industry. Of course, in other embodiments, the multi-channel volume control circuit 6 may be implemented by using other existing volume control chips.
The output end of the audio processing circuit 7 is connected to an audio output interface 8, and the audio output interface 8 is used for receiving a power amplifier, a speaker, and the like on the vehicle, and in this embodiment, the number of the audio output interfaces 8 is 3.
The output end of the digital trigger signal circuit 10 is connected to the digital signal output interface 9, the digital signal output interface 9 is used for triggering the trigger control end of the corresponding device such as a power amplifier and a display on the vehicle to trigger the corresponding device to operate correspondingly, if the TV mode is selected, the digital signal is output to trigger the corresponding display on the vehicle to operate to play video, the number of the digital signal output interfaces 9 is set according to the actual situation, for example, in the present specific embodiment, the number of the digital signal output interfaces 9 is 10.
In this specific embodiment, still include the warning tone circuit 14, the control termination treater 11 of warning tone circuit 14, the output termination of warning tone circuit 14 is an input of multichannel volume control circuit 6, and warning tone circuit 14 is equipped with various warning tones in advance to carry out the function suggestion, through setting up warning tone circuit 14, can reduce the performance requirement to treater 11, reduce cost.
In this embodiment, the vehicle control system further includes a CAN communication circuit 22, the CAN communication circuit 22 is connected to the processor 11, and the processor 11 CAN communicate with a controller of the vehicle through the CAN communication circuit 22.
In this embodiment, the wireless communication unit is further included, the wireless communication unit is in communication connection with the processor 11, an audio output end of the wireless communication unit is connected with an input end of the multi-channel audio switching circuit 4, a user can conveniently use a mobile terminal such as a mobile phone to perform operation control, and the use is more convenient.
Preferably, in this embodiment, the wireless communication unit is a bluetooth communication unit 19, the bluetooth communication unit 19 communicates with the processor 11 through an I2C serial port mode, thereby realizing the functions of controlling the bluetooth communication unit 19 and receiving bluetooth instructions, the connection through the mobile phone and the bluetooth communication unit 19 is paired, the operation instructions on the mobile phone APP are transmitted through bluetooth, the bluetooth communication unit 19 receives the instructions on the mobile phone APP and then transmits the instructions to the processor 11, the processor 11 performs corresponding operations on the product according to instruction definitions, and the use is more convenient.
In this embodiment, the display screen 13 is an OLED display screen driven by an SSD1322 chip, and has 16 brightness types for adjustment, and the whole interface may be refreshed or a part of the interface may be refreshed when the interface is refreshed, so as to meet the requirement of real-time display when frequent change is required in a certain area, and the display screen 13 is also suitable for a main control chip with a low frequency, and is used for displaying the state of each function, such as USB pull-out, plug-in, or load, and the like. In other embodiments, the display 13 may be implemented by other existing displays.
In this specific embodiment, the processor 11 is implemented by a single chip microcomputer with a model number stm32f105, and of course, in other embodiments, the processor 11 may also be implemented by other existing processors.
In this embodiment, the microphone input interfaces include a driver microphone input interface 15 and a guide microphone input interface 16, but in other embodiments, the number and types of the microphone input interfaces may be set according to actual situations, which can be easily implemented by those skilled in the art and will not be described in detail.
In this embodiment, the microphone input interface is compatible with a condenser microphone and a moving-coil microphone.
In this embodiment, the key circuit 12 includes a volume adjusting key, a power switch key, a plurality of mode switching keys, a music-on key, a music-off key, a pause key, a menu key, and the like, and is used for performing corresponding control operations.
Further, in this embodiment, the present invention further includes a feedback circuit 21, where the feedback circuit 21 is configured to feed back a signal output by the output terminal of the digital trigger signal circuit 10 to the processor 11 for processing and analysis, and determine whether the digital signal output by the digital trigger signal circuit 10 is normal, so as to determine the fault problem point more accurately.
The specific circuit connections of this embodiment are shown in fig. 2-17, which are not described in detail.
When the audio/video playing device is used, a user performs operation control through the key circuit 12 or a mobile phone connected with the Bluetooth communication unit 19 in a Bluetooth communication mode, and the processor 11 controls the decoding circuit 1, the multi-channel audio switching circuit 4, the sound effect processing circuit 5, the multi-channel volume control circuit 6, the prompt sound circuit 14, the display screen 13 and the digital trigger signal circuit 10 to perform corresponding work according to a received operation control instruction so as to perform corresponding audio/video playing.
The utility model discloses can realize more rationally distributing display and speaker on the car with a plurality of audio and video equipment signals on the car, improve the result of use to improve and use experience and feel.
Claims (10)
1. The utility model provides a on-vehicle multichannel audio frequency and video switch which characterized in that: comprises a decoding circuit, a video driving circuit, a multi-channel audio switching circuit, an audio processing circuit, a multi-channel volume control circuit, an audio processing circuit, a processor, a key circuit, a display screen and a digital trigger signal circuit, wherein the decoding circuit is provided with a plurality of external storage device input interfaces, a video output end of the decoding circuit is connected with a video output interface through the video driving circuit, an audio output end of the decoding circuit is connected with an input end of the multi-channel audio switching circuit, the multi-channel audio switching circuit is provided with a plurality of external audio input interfaces, one channel of an output end of the multi-channel audio switching circuit is connected with the input end of the audio processing circuit through the audio processing circuit, the other channel of the output end of the multi-channel audio switching circuit is connected with an input end of the multi-channel volume control circuit, an output end of the audio processing circuit is connected with the audio output interface, and the multi-channel volume control circuit is also provided with a microphone input interface, the decoding circuit, the multi-channel audio switching circuit, the sound effect processing circuit, the multi-channel volume control circuit, the key circuit, the display screen and the digital trigger signal circuit are respectively connected with the processor, and the output end of the digital trigger signal circuit is connected with the digital signal output interface.
2. The vehicle-mounted multi-channel audio-video switcher of claim 1, wherein: the multi-channel volume control circuit also comprises a prompt tone circuit, wherein the control end of the prompt tone circuit is connected with the processor, and the output end of the prompt tone circuit is connected with the input end of the multi-channel volume control circuit.
3. The vehicle-mounted multi-channel audio-video switcher of claim 1, wherein: the CAN communication circuit is connected with the processor.
4. The vehicle-mounted multi-channel audio-video switcher of claim 1, wherein: the wireless communication unit is in communication connection with the processor, and an audio output end of the wireless communication unit is connected with an input end of the multi-channel audio switching circuit.
5. The vehicle-mounted multi-channel audio-video switcher of claim 4, wherein: the wireless communication unit is a Bluetooth communication unit.
6. The vehicle-mounted multi-channel audio-video switcher of claim 1, wherein: the digital trigger signal circuit also comprises a feedback circuit which is used for feeding back the signal output by the output end of the digital trigger signal circuit to the processor.
7. The vehicle-mounted multi-channel audio-video switcher of claim 1, wherein: the plurality of external storage device input interfaces of the decoding circuit comprise a USB input interface and an SD card input interface.
8. The vehicle-mounted multi-channel audio-video switcher of claim 1, wherein: the microphone input interface includes a driver microphone input interface and a guide microphone input interface.
9. The vehicle-mounted multi-channel audio-video switcher of claim 8, wherein: the microphone input interface is compatible with a condenser microphone and a moving-coil microphone.
10. The vehicle-mounted multi-channel audio-video switcher of claim 1, wherein: the decoding circuit is in serial port communication connection with the processor, and the display screen is an OLED display screen driven by an SSD1322 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022544182.2U CN214412877U (en) | 2020-11-06 | 2020-11-06 | Vehicle-mounted multi-channel audio and video switcher |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022544182.2U CN214412877U (en) | 2020-11-06 | 2020-11-06 | Vehicle-mounted multi-channel audio and video switcher |
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| CN214412877U true CN214412877U (en) | 2021-10-15 |
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| CN202022544182.2U Active CN214412877U (en) | 2020-11-06 | 2020-11-06 | Vehicle-mounted multi-channel audio and video switcher |
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