Audio emission chip, audio receiving chip and wireless microphone system

Abstract

The invention relates to an audio emission chip, an audio receiving chip and a wireless microphone system. The audio emission chip comprises an emission front-end processing module for performing dynamic range contraction processing on an audio signal, modulating auxiliary information, and superposing the processed audio signal and the modulated auxiliary information to obtain a composite signal, and a modulator for modulating the composite signal into a radio frequency signal according to a channel selection signal, wherein the frequency of the modulated auxiliary information is different from that of the audio signal; and the emission front-end processing module and the modulator are integrated in a single integrated circuit. The audio emission chip can emit and receive the audio signal and the auxiliary information at the same.

Description

technical field

[0001] The invention relates to the field of microelectronics, in particular to an audio transmitting chip, an audio receiving chip and a wireless microphone system. Background technique

[0002] When people communicate in large spaces such as conference rooms and stages, the sound energy emitted by natural sound sources (such as speeches, musical instruments, and singing) is limited, and the sound pressure level increases with the increase of the propagation distance. The rapid attenuation, coupled with the influence of environmental noise, makes the sound propagation distance shorter. Therefore, it is necessary to use a microphone to amplify the signal of the sound source, effectively increase the sound pressure level within the sound field range, and increase the sound propagation distance. There are two types of microphones: wired microphones and wireless microphones. Among them, wireless microphones are widely used because they are more convenient to car...

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