| A7121在数字音频无线传输系统中的应用 |
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| 引用本文： | 孙光民,陈德明,于光宇,赵德群,王强.A7121在数字音频无线传输系统中的应用[J].北京工业大学学报,2008,34(12). |
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| 作者姓名： | 孙光民 陈德明 于光宇 赵德群 王强 |
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| 作者单位： | 北京工业大学电子信息与控制工程学院,北京,100022 |
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| 基金项目： | 北京市教委科技发展计划项目 |
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| 摘 要： | 针对目前大多数短距离无线传输方案音质差、成本高的现状,提出了一套运用A7121、WM8725、ATmega48等低成本芯片来实现高保真数字音频无线传输系统的设计方案,具体阐述了系统的总体设计框图、硬件电路设计和软件编程.实验表明,该方案成本低、音质好、抗干扰性强,其主要技术指标达到总谐波失真仅0.1%,频率响应为20 Hz～20 kHz,信噪比为95 dB,有效传输距离达100 m,音频输出达到CD音质效果.
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| 关 键 词： | 数据通讯 音频信号处理 无线传输系统 射频通讯 单片机 |
Application of A7121 in Wireless Transmission System of Digital Audio |
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| SUN Guang-min,CHEN De-ming,YU Guang-yu,ZHAO De-qun,WANG Qiang.Application of A7121 in Wireless Transmission System of Digital Audio[J].Journal of Beijing Polytechnic University,2008,34(12). |
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| Authors: | SUN Guang-min CHEN De-ming YU Guang-yu ZHAO De-qun WANG Qiang |
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| Abstract: | 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. |
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| Keywords: | data communication audio signal processing wireless telecommunication systems radio communication single chip |
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