基于ARMCortex-M3数字音频网络广播终端的设计与实现

发布时间：2018-01-05 14:04

本文关键词：基于ARMCortex-M3数字音频网络广播终端的设计与实现　出处：《西安科技大学》2012年硕士论文　论文类型：学位论文

【摘要】：嵌入式和网络技术的飞速发展，给传统的音频处理和传输领域带来了极大的冲击。传统的模拟音频广播技术将逐步被基于以太网络传输的数字音频网络广播技术所取代。采用低成本、低功耗、体积小、应用灵活的嵌入式系统成为了数字音频网络广播系统的发展趋势。本文针对数字音频网络广播系统的应用需求，，提出了一种基于嵌入式系统的数字音频网络广播终端的设计方案。本终端以基于ARM Cortex-M3内核的微处理器LM3S9B96为核心，设计了主处理模块、外部存储模块、音频模块、网络接口模块和电源模块，实现了数字音频网络广播终端的硬件平台设计。本文提出了基于SafeRTOS实时操作系统的终端驱动程序实现方案。在参考实时传输协议(RTP)及实时传输控制协议(RTCP)的基础上，设计了基于UDP协议的适合数字音频网络广播的网络传输协议，解决了广播数据传输的实时性和可靠性问题。完成了基于嵌入式TCP/IP协议栈LwIP的音频数据传输及播放程序的设计。最后为确保数字音频网络广播终端符合工业化要求，对数字音频网络广播终端进行了驱动程序测试、音频性能指标测试和功能性测试。实验表明该系统同传统的广播系统相比，体现出了明显的优势，达到了设计要求。
[Abstract]:The rapid development of embedded technology and network technology, brings great impact to the audio processing and transmission field. The traditional analog audio broadcasting technology of traditional broadcasting technology will gradually be based on Ethernet network digital audio replaced. With low cost, low power consumption, small volume, flexible application of embedded system has become the development trend of network digital audio broadcasting system.
According to the application requirements of the network digital audio broadcasting system, this paper puts forward a design scheme of embedded system network digital audio broadcasting terminal based on Cortex-M3. The terminal uses ARM microprocessor based on LM3S9B96 as the core, design the main processing module, external storage module, audio module, network interface module and power supply module, realized the design of hardware platform of network digital audio broadcasting terminal.
This paper presents a design scheme of terminal SafeRTOS real-time operating system based on driver. In reference to the real-time transport protocol (RTP) and real time Transport Control Protocol (RTCP) based on the design of network protocol for network digital audio broadcasting system based on UDP protocol to solve the radio data transmission problem of real time and reliability. Complete the design of audio data transmission of embedded TCP/IP protocol stack LwIP and broadcast program based on.
Finally, in order to ensure the network digital audio broadcasting terminal in line with the industrialization requirements of network digital audio broadcasting terminal of audio driver testing, performance testing and functional testing. The experimental results show that compared with the traditional broadcasting system, the system reflects the obvious advantages, meet the design requirements.

【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TN934.3;TP368.12

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