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Signal transmission system based on wireless MIC

A signal transmission system and wireless technology, which is applied in the field of wireless radio frequency, can solve the problems of mutual interference of wireless MIC systems, affecting the stability of sound transmission, etc., and achieve the effect of good linearity and solving the problem of crosstalk

Pending Publication Date: 2021-06-01
SHANGHAI HANGSHENG IND
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AI Technical Summary

Problems solved by technology

Now many large passenger cars are equipped with the right wireless MIC system. For example, in tourist vehicles, the tour guide introduces the corresponding matters to the tourists through the wireless MIC system in the car. However, once the tourist vehicle enters the tourist site, mutual interference between the wireless MIC systems is likely to occur. The situation greatly affects the stability of sound transmission

Method used

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  • Signal transmission system based on wireless MIC
  • Signal transmission system based on wireless MIC

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Embodiment Construction

[0025] A wireless MIC-based signal transmission system, specifically, including a wireless transmitting unit and a wireless receiving unit;

[0026] like figure 1 As shown, the wireless transmitting unit adopts 24Bit / 48KHz high-performance audio-specific Δ-Σ A / D to process the audio collected by the microphone and D / A to restore the received audio signal; it adopts 1 / 4πDQPSK digital modulation / demodulation mode , all-digital wireless transmission, different from the traditional FM modulation / demodulation method, no compression / expansion processing, no pre-emphasis / de-emphasis processing during audio transmission, retaining the original flavor of the sound, so the frequency of the sound Loudness, transient, linearity and other indicators are very good, very close to the sound quality of wired microphones. Specific: include,

[0027] The collecting device is used to obtain the analog sound signal, and outputs the collected sound analog signal; specifically, a collection circui...

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Abstract

The invention relates to a wireless radio frequency technology, in particular to a signal transmission system based on a wireless MIC, which comprises a wireless transmitting unit and a wireless receiving unit; the wireless transmitting unit comprises: an acquisition device which is used for acquiring a sound analog signal and outputting the acquired sound analog signal; a key forming device which is used for forming key data output; a modulation device which is respectively connected with the acquisition device and the secret key forming device, and is used for receiving the secret key data and the sound analog signal, performing digital processing on the sound analog signal to form a sound digital signal, and performing modulation processing on the sound digital signal according to the secret key data to form transmission data output; the wireless receiving unit comprises a demodulation device which is used for receiving the transmission data, judging whether the transmission data is matched with preset information or not, and demodulating the transmission data in the state that the transmission data is matched with the preset information so as to form a signal to be played and output the signal to be played.

Description

technical field [0001] The invention relates to wireless radio frequency technology, in particular to a signal transmission system based on a wireless MIC. Background technique [0002] The comfort of a car is one of the most basic and important performances of a car, especially with the continuous improvement of people's living standards, various pursuits have transitioned from the previous food and clothing to the quality of life, and the functions of cars are also constantly improving , from the initial analog radio to digital radio, and then to MP3 playing digital music at the back; from the small digital screen at the beginning to the intelligent audio-visual system at the back. Customers' pursuit in the spiritual world is gradually deepening, and our products are also changing with each passing day, bringing forth new ones. The audio-visual system has also made great progress. It has been several years since the original wired MIC was used for the subsequent wireless ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/20H04L27/22H04L29/06H04R3/00H04B1/04H04B1/16
CPCH04L27/20H04L27/22H04L63/0428H04B1/04H04B1/16H04R3/00
Inventor 余龙吴海为吴华建
Owner SHANGHAI HANGSHENG IND
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