Application of A7121 in wireless transmission system of digital audio - 文章详情页

作者：

Sun, Guang-Min (Sun, Guang-Min.) (学者：孙光民) | Chen, De-Ming (Chen, De-Ming.) | Yu, Guang-Yu (Yu, Guang-Yu.) | Zhao, De-Qun (Zhao, De-Qun.) | Wang, Qiang (Wang, Qiang.)

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摘要：

Aiming　at　the　deficiency　of　the　most　short-range　wireless　transferring　systems　with　bad　sound　quality　and　high　cost,　this　paper　proposed　a　design　to　realize　a　high-fidelity　wireless　audio　digital　transferring　system　by　using　the　cheaper　chips,　such　as　A7121,　WM8725,　ATmega48,　etc.　Then　we　expatiated　the　detail　of　the　system＇s　architecture,　the　hardware　connection　and　software　design　in　the　paper.　The　experimental　results　show　that　this　resolution　has　lower　cost,　better　sound　quality　and　powerful　anti-jamming.　The　concrete　performance　parameters　of　the　system　are　up　to　the　total　harmonic　distortion　ratio　of　0.1%,　the　frequency　response　range　of　20　Hz~20　kHz,　the　signal-to-noise　ratio　(SNR)　of　95　dB,　the　effective　transmitting　distance　of　100　m　and　the　perfect　CD　sound　quality.

关键词：

Acoustic variables measurement Audio acoustics Audio signal processing Audio systems Data handling Frequency response Mobile telecommunication systems Radio communication Signal to noise ratio Software design Sound reproduction

作者机构：

[ 1 ] [Sun, Guang-Min]College of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100022, China
[ 2 ] [Chen, De-Ming]College of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100022, China
[ 3 ] [Yu, Guang-Yu]College of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100022, China
[ 4 ] [Zhao, De-Qun]College of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100022, China
[ 5 ] [Wang, Qiang]College of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100022, China

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