论文标题:基于银河飞腾-DSP的音频与网络系统设计与实现
Design and Implementation of an Audio and Network System Based on YHFT-DSP
论文作者
论文导师 张民选,论文学位 硕士,论文专业 软件工程
论文单位 国防科学技术大学,点击次数 48,论文页数 96页File Size5888K
2006-03-01论文网 http://www.lw23.com/lunwen_728324367/
MP3;; TCP/IP;; DSP;; embedded system;; fast algorithm
银河飞腾-D4是国防科大计算机学院自主设计的新一代高性能32位定点DSP微处理器芯片,应用目标是无线基站、ADSL、雷达、图像及多媒体信息处理等高性能数字信号处理。在芯片成功推出后,基于银河飞腾-D4的嵌入式系统开发就成为一个很重要的课题。而音频和网络已经成为嵌入式开发中非常热门的两个应用,是多媒体信息处理不可缺少的部分。因此,通过开发基于银河飞腾-D4的音频和网络系统,可以极大推进银河飞腾-D4的应用前景。 本课题的主要目标就是以银河飞腾-D4定点DSP芯片为核心,研究MP3解码的快速算法并在定点DSP上实现,以及基于嵌入式系统的TCP/IP协议的开发和实现。本文首先介绍了MPEG系列国际标准音频编解码技术的发展,详细分析了MP3解码算法的各个模块;阐述了TCP/IP协议的基本概念,分析了嵌入式TCP/IP协议的实现。在此基础上,以银河飞腾-D4定点DSP芯片为核心设计了一个通用的音频信号处理和网络传输的硬件平台,用来进行MP3解压播放和运行嵌入式TCP/IP协议栈。最后,对MP3解码进行了算法上的优化以及针对银河飞腾-D4体系结构进行了cache、软件流水等方面的优化,实现了MP3实时解码播放;针对以太网通信控制理论以及嵌入式系统的特点,设计嵌入式TCP/IP协议栈,并在此基础上建立一个Telnet服务器,实现了以太网接入功能。整个系统具有完善的MP3解码和网络传输功能,可以通过软件编程实现多种音频信号的处理和网络点播等功能,具有很强的灵活性。
YHFT-D4 is a new generation of 32-bit fixed point DSP chip designed by the computer college of National University of Defense Technology. It will be applied to the high quality DS transactions such as wireless communication, ADSL, radar, image and multimedia information transaction. With the success of chip design, it becomes very important to develop the YHFT-D4 based embedded system. On the other hand, audio and network have become two popular applications of developing the embedded system and they are indispensable parts in multimedia information transaction. The development of the YHFT -D4 based audio and network systems can push greatly the application future of YHFT -D4. The goal of the thesis is to research and implement the MP3 decoding fast-algorithm on fixed point DSP and to research the development and implementation of the TCP/IP stack based on the YHFT-D4 chip. Firstly, the thesis introduced the development of international standard audio technology of the series of MPEG, the analyses about every module of MP3 decoding algorithm, the basic concept of TCP/IP stack, and the implementation of embedded TCP/IP stack. Secondly, the hardware system related to audio and network is designed to accomplish the TCP/IP"s running and data decoding and the control function by using YHFT-D4 chip. Finally, optimization to the algorithm of MP3 decoding, the using of cache and the using software pipeline is done to accomplish the real-time decoding, and the implementation of the Internet function is also done by create a telnet server using the embedded TCP/IP stack, which is designed based on the theory of Internet and the feature of embedded system. The whole system has the full function of MP3 decoding and network transfer, we can implement flexibly several audio signals" transactions and the function of ordering programme on network by software programming.
|
