Audio high-speed transmission system and method

Abstract

The invention relates to an audio high-speed transmission system and method. The audio high-speed transmission system comprises a transmitter and a receiver, wherein the transmitter consists of an audio input circuit, an AD (Analogue-to-Digital) conversion circuit, a transmitter MCU (Microprogrammed Control Unit) control circuit and a receiver RS485 (Remote Sensing485) transmission circuit; and the receiver consists of a receiver RS485 transmission circuit, a receiver MCU control circuit, a DA (Digital-to-Analogue) conversion circuit and an audio output circuit. The audio high-speed transmission system is used for transmitting an audio to the other end in high quality through an ordinary cable; and the cost is low and the high-quality transmission is convenient to control. As RS485 transmission is digital transmission, no sound quality is lost in the process of transmission. Minor sound quality loss is generated by digitalizing an analogue signal, but the sound quality loss is very small when the sampling rate and the resolution ratio reach to certain degrees. The digitalization of an audio signal is advantaged in convenience for signal processing, storage and transmission.

Description

technical field [0001] The invention relates to an audio transmission system and method. Background technique [0002] Most of the existing audio long-distance transmission uses a dedicated audio cable. Using a dedicated audio cable, the sound quality is okay if the distance is close, but the sound quality will be poor if the distance is far away, and the noise will come out. Besides, the price of the dedicated audio cable is also expensive. more expensive. Therefore, the existing audio long-distance transmission cannot be widely used in the field of remote monitoring. The digital transmission of audio signals has become a development trend of long-distance transmission. In terms of specific circuit implementation methods, there is another way, which is to use Ethernet physical transmission chips (PHY) to promote network cable transmission, and the sound quality is basically close. But the cost will rise a lot. First of all, the network transmission chip will be much more ...

AI Technical Summary

Problems solved by technology

[0002] Most of the existing audio long-distance transmission uses a dedicated audio cable. Using a dedicated audio cable, the sound quality is okay if the distance is close, but the sound quality will be poor if the distance is far away, and the noise will come out. Besides, the price of the dedicated audio cable is also expensive. more expensive

Therefore, the existing audio long-distance transmission cannot be widely used in the field of remote monitoring

The digital transmission of audio signals has become a development trend of long-distance transmission. In terms of specific circuit implementation methods, there is another way, which is to use Ethernet physical transmission chips (PHY) to promote network cable transmission, and the sound quality is basically close. But the cost will rise a lot. First of all, the network transmission chip will be much more expensive than the RS485 chip, and the control chip MCU connected to the network transmission chip must have MAC components or be implemented with a programmable logic device FPGA, which will lead to an increase in cost. The cost will increase a lot, and the scheme of using Ethernet physical transmission chip is relatively low cost performance, and the circuit is complicated

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