Multi-band audio playing unit, and system and method thereof

Abstract

The invention relates to a multi-band audio playing unit, and a system and method thereof. The unit comprises an MCU (microprogrammed control unit) and an audio IC (integrated circuit), wherein a playing module, a memory module and a WiFi module are arranged in the audio IC; the MCU is connected with the WiFi module; the WiFi module isconnected with the playing module and the memory module. The MCU receives an audio signal and transmits the audio signal to the audio IC; when the distance between different multi-band audio playing units is long, the nearest multi-band audio playing unit adopts the WiFi module and memory module to implement sectionalized short-distance connection, thereby achieving smaller volume, high temperature resistance and short time delay during one-to-many voice frequency transmission, accurately controlling the transmission distance of sound waves, and having smaller differences on sound intensity of different devices.

Description

technical field [0001] The present invention relates to the technical field of audio transmission, and more specifically refers to a multi-band audio playback unit and a system and method including the multi-band audio playback unit. Background technique [0002] Recently, short-distance electronic payment has developed rapidly, especially after the gradual popularization of smart terminals, O2O (Online To Offline) applications have promoted the development of various short-distance electronic payment technologies. The main technologies applied in this field are: NFC (Near Field Communication) technology based on 13.56MHz, RFID-SIM / RFID-SD technology based on 2.4GHz, QR (Quick Response) code, audio data transmission technology Wait. [0003] The disadvantage of audio data transmission technology is that the propagation distance of sound waves cannot be precisely controlled, and the sound intensity of different devices varies greatly. At present, most audio modules are integ...

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Problems solved by technology

[0003] The disadvantage of audio data transmission technology is that the propagation distance of sound waves cannot be accurately controlled, and the sound intensity of different devices varies greatly. At present, most audio modules are integrated with other video transmission modules and picture transmission modules. The audio transmission circuit board developed here is too large, and many small devices such as small speakers and earphones cannot be implanted. The module cost is too high, and only high-end products can be used. The delay of one-to-many audio transmission is too large, and the temperature resistance is low.

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