CN220823272U - Signal chain transmission module of digital audio of intelligent cabin of automobile - Google Patents
Signal chain transmission module of digital audio of intelligent cabin of automobile Download PDFInfo
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- CN220823272U CN220823272U CN202322594652.XU CN202322594652U CN220823272U CN 220823272 U CN220823272 U CN 220823272U CN 202322594652 U CN202322594652 U CN 202322594652U CN 220823272 U CN220823272 U CN 220823272U
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 19
- 239000013307 optical fiber Substances 0.000 claims description 3
- 230000008054 signal transmission Effects 0.000 abstract description 7
- 230000005236 sound signal Effects 0.000 abstract description 7
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Abstract
The embodiment of the utility model discloses a signal chain transmission module of digital audio of an intelligent cabin of an automobile, which comprises a digital audio processor, a digital microphone, a digital power amplifier, a loudspeaker, a main control module, a Bluetooth chip, an AUX interface, a DTV interface and an ADC chip, wherein the digital audio processor is connected with the digital microphone, the digital power amplifier, the main control module, the Bluetooth chip and the ADC chip through I2S signals for transmission; the ADC chip is connected with the AUX interface and the DTV interface and converts analog signals received by the AUX interface and the DTV interface into digital signals; the loudspeaker is connected with the digital power amplifier. According to the utility model, all audio signals are changed into digital signals, so that the influence of external signals on audio is completely avoided, the anti-interference capability of the audio signals is improved, and the signal transmission is stable and reliable.
Description
Technical Field
The utility model relates to the application field of automobile multimedia digital audio, in particular to a signal chain transmission module of automobile intelligent cabin digital audio.
Background
With the technical development of intelligent cabins of automobiles, the requirements of people on audio are higher and higher, the traditional design basically uses analog signals for audio transmission, and the analog signals are used from the sound input of a man-machine interface to an intermediate processing link and then to a final audio output link, so that the characteristics of the analog signals feel that the analog signals are easily interfered by external signals, such as various clock signals on a circuit board, interference generated by high-frequency digital signals and the like in I2C, UART, I2S, USB, LVDS, MIPI, HDMI, DDR and the like, crosstalk and the like. The existing audio signal has poor anti-interference capability and unstable signal transmission.
Disclosure of utility model
The technical problem to be solved by the embodiment of the utility model is to provide the signal chain transmission module of the digital audio of the intelligent cabin of the automobile, so as to avoid the influence of external signals on the audio, improve the anti-interference capability of the audio signals and ensure stable and reliable signal transmission.
In order to solve the technical problems, the embodiment of the utility model provides a signal chain transmission module of digital audio of an intelligent cabin of an automobile, which comprises a digital audio processor, a digital microphone, a digital power amplifier, a loudspeaker, a main control module, a Bluetooth chip, an AUX interface, a DTV interface and an ADC chip, wherein the digital audio processor is connected with the digital microphone, the digital power amplifier, the main control module, the Bluetooth chip and the ADC chip through I2S signals for transmission; the ADC chip is connected with the AUX interface and the DTV interface and converts analog signals received by the AUX interface and the DTV interface into digital signals; the loudspeaker is connected with the digital power amplifier.
Further, the portable digital audio system also comprises a radio chip, and the radio chip is connected with the digital audio processor through an I2S signal for transmission.
Further, the digital audio processor also comprises an S/PDIF interface for optical fiber and coaxial output, and the S/PDIF interface and the digital audio processor are transmitted through an S/PDIF signal connection.
The beneficial effects of the utility model are as follows: according to the utility model, all audio signals are changed into digital signals, so that the influence of external signals on audio is completely avoided, the anti-interference capability of the audio signals is improved, and the signal transmission is stable and reliable.
Drawings
Fig. 1 is a schematic block diagram of a signal chain transmission module of digital audio of an intelligent cabin of an automobile according to an embodiment of the utility model.
Detailed Description
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other, and the present utility model will be further described in detail with reference to the drawings and the specific embodiments.
In the embodiment of the present utility model, if there is a directional indication (such as up, down, left, right, front, and rear … …) only for explaining the relative positional relationship, movement condition, etc. between the components in a specific posture (as shown in the drawing), if the specific posture is changed, the directional indication is correspondingly changed.
In addition, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implying an indication of the number of features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.
Referring to fig. 1, a signal chain transmission module of digital audio of an intelligent cabin of an automobile in an embodiment of the utility model includes a digital audio processor, a digital microphone, a digital power amplifier, a loudspeaker, a main control module, a bluetooth chip, an AUX interface, a DTV interface, an ADC chip, a radio chip, and an S/PDIF interface.
The digital audio processor is connected with the digital microphone, the digital power amplifier, the main control module, the Bluetooth chip and the ADC chip through I2S signals for transmission. The digital audio processor carries multiple sets of I2S signals while supporting S/PDIF signals. The digital audio processor can mix the externally input microphone signal and the signal output by the DSP to the power amplifier and synchronously send the signals to the main control module and the Bluetooth chip through the I2S signal. The digital audio processor transmits microphone signals to the main control module through the I2S and signals output to the power amplifier through the DSP, and the main control module can perform voice recognition and noise reduction after receiving the signals, so that the voice recognition rate of the system is improved, and the tone quality effect is improved. The digital audio processor transmits microphone signals and signals output to the power amplifier by the DSP to the Bluetooth chip through the I2S, and after the Bluetooth chip receives the signals, the digital audio processor can perform echo elimination processing of voice call, thereby improving the tone quality effect of the Bluetooth call
The main control module also uses digital signal transmission, and transmits the digital signal to the digital audio processor through the I2S, and transmits the digital signal to the digital power amplifier after sound effect processing. The Bluetooth chip also uses digital signal transmission, MIC signals required by Bluetooth are forwarded to the Bluetooth chip through the digital audio processor, sound received by the Bluetooth chip is also transmitted back to the digital audio processor through I2S, and the sound effect is processed and then transmitted to the digital power amplifier.
The ADC chip is connected with the AUX interface and the DTV interface and converts analog signals received by the AUX interface and the DTV interface into digital signals. The externally input analog signals, such as analog audio of external devices such as AUX, TV and the like, are input into the module, are connected into the ADC chip, are converted into digital signals for transmission, enter into the digital audio processor for digital signal processing, reduce the interference and crosstalk introduction of other external digital signals, are transmitted back to the digital audio processor through I2S, and are transmitted to the digital power amplifier after being subjected to sound effect processing.
The loudspeaker is connected with the digital power amplifier. The digital audio signal of the digital audio processor is transmitted through the I2S signal to the digital power amplifier, and the digital power amplifier drives the loudspeaker of the original vehicle to sound.
The radio chip is connected with the digital audio processor through an I2S signal for transmission. The radio chip also uses digital signal transmission, and the FM/AM audio of the radio is transmitted back to the digital audio processor through the I2S, and is transmitted to the digital power amplifier after being subjected to sound effect processing.
The S/PDIF interface is used for optical fiber and coaxial output, and the S/PDIF interface and the digital audio processor are connected and transmitted through an S/PDIF signal.
The digital microphone directly outputs digital signals, so that interference of the outside on microphone signals is reduced.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the utility model as defined by the appended claims and their equivalents.
Claims (3)
1. The signal chain transmission module of the intelligent cabin digital audio of the automobile is characterized by comprising a digital audio processor, a digital microphone, a digital power amplifier, a loudspeaker, a main control module, a Bluetooth chip, an AUX interface, a DTV interface and an ADC chip, wherein the digital audio processor is connected with the digital microphone, the digital power amplifier, the main control module, the Bluetooth chip and the ADC chip through I2S signals for transmission; the ADC chip is connected with the AUX interface and the DTV interface and converts analog signals received by the AUX interface and the DTV interface into digital signals; the loudspeaker is connected with the digital power amplifier.
2. The signal chain transmission module of the digital audio of the intelligent cabin of the automobile according to claim 1, further comprising a radio chip, wherein the radio chip and the digital audio processor are connected and transmitted through an I2S signal.
3. The signal chain transmission module of digital audio of intelligent cabin of automobile according to claim 1, further comprising S/PDIF interface for optical fiber and coaxial output, and the S/PDIF interface and the digital audio processor are connected and transmitted through S/PDIF signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322594652.XU CN220823272U (en) | 2023-09-25 | 2023-09-25 | Signal chain transmission module of digital audio of intelligent cabin of automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322594652.XU CN220823272U (en) | 2023-09-25 | 2023-09-25 | Signal chain transmission module of digital audio of intelligent cabin of automobile |
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| Publication Number | Publication Date |
|---|---|
| CN220823272U true CN220823272U (en) | 2024-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322594652.XU Active CN220823272U (en) | 2023-09-25 | 2023-09-25 | Signal chain transmission module of digital audio of intelligent cabin of automobile |
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| Country | Link |
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| CN (1) | CN220823272U (en) |
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2023
- 2023-09-25 CN CN202322594652.XU patent/CN220823272U/en active Active
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