基于ARM7的以太网实时语音录放系统  

Design of Ethernet Real-time Voice Recording and Playback System Based on ARM7

作　　者：沈阳 Shen Yang(Zhejiang Holip Electronic Technology Co.,Ltd.,Jiaxing 314031,China)

机构地区：[1]浙江海利普电子科技有限公司,嘉兴314031

出　　处：《单片机与嵌入式系统应用》2022年第9期79-83,共5页Microcontrollers & Embedded Systems

摘　　要：设计了一种基于ARM7微控制器和以太网的实时语音录放系统。在局域网中,上位机采用广播的方式向各个下位机发送ADPCM语音数据包,下位机对接收到的数据包进行ADPCM解码,以DMA方式通过I2S总线发送给UDA1341语音模块进行播放。另外,可以将录制的PCM数据经过ADPCM压缩后上传至上位机进行保存。除了上位机可以对下位机进行音量和均衡器的调节外,各个下位机也可以通过键盘进行个性化的控制,并且通过TFT彩色液晶显示播放的状态。实验结果表明,本系统实现了局域网内的语音实时录放。In the paper,a real-time audio player based on the ARM7 and the Ethernet is designed.The hosts broadcast audio packets coded by ADPCM to each node in LAN.The node decodes the ADPCM packets,then transfers the PCM datas to UDA1341 audio module for playback through the I2S bus in the type of DMA.In addition,the recorded PCM can be compressed by ADPCM,then upload to the host for save.Not only the host computer could adjust the volume and EQ,each node can also adjust the items by the keyboard.Otherwise,TFT color liquid crystal can display the various states of the system.The practice results show that the system can process the realtime audio in the LAN well.

关 键 词：语音录放 ARM7 ADPCM UDA1341 

分 类 号：TP31[自动化与计算机技术—计算机软件与理论]