文档介绍：基于 DSP 技术的便携式编码器的设计与应用上海交通大学工程硕士生学位论文
基于 DSP 技术的便携式编码器的设计与应用
摘要
目前,视音频编码技术是广播、网络领域普遍应用的技术。WM9 编
码技术凭借其优异的编码质量,在视音频领域逐渐开始了广泛的应用。
本论文的研究工作主要是针对广播领域的需求,开发一套基于 DSP
技术的 WM9 编码系统。论文的主要研究工作包括:高速数字信号处理器
(DSP)的应用;视、音频信号的采集设计以及基于 DSP 的 FAT32 文件
系统的设计实现。
本论文的关键技术包括:、音频信号的采集设计,在电路板布
局、布线等多方面给予了充分考虑;,考虑
到系统算法的复杂性及其对实时性的要求,选用了 TI 公司的主频高达
720MHz 的 TMS320DM642,其峰值处理能力高达 5760MIPS,极好的完成
了视音频编码以及 FAT32 文件系统的建立处理机制;
中,视音频模拟信号经模数转换器后的大量原始数据需要及时、准确的
传输给 DSP 进行后续处理,为此,系统在进行高速电路板的设计中,充
分的考虑了电磁干扰,传输信号处理等问题,为系统功能的实现提供了
可靠的保证。
在硬件系统设计中,着重考虑了系统对可靠性、噪声、相位一致性
等方面的要求,并相应的采用了优化措施,基本实现了一套能够满足设
计要求的系统。
关键字:WM9,数字信号处理器(DSP),FAT32,CF
第Ⅰ页
基于 DSP 技术的便携式编码器的设计与应用上海交通大学工程硕士生学位论文
CONVENIENT ENDODER DESIGN AND APPLICATION
BASED ON DSP TECHNOLOGY
ABSTRACT
The encoder technology of video and audio is applied to broadcast and
. WM9 has been found more and more applications because of it’s
excellent encoder quality.
The aim of this paper is to develop a hardware system which satisfies the
demand of the WM9 encoder arithmetic realization , including video and
audio receiver design, high speed Digital Signal Processor (DSP), as well as
high speed PCB and FAT32 file system based on DSP.
The main contribution is as follows: (1) video and audio receiver design.
In order to get excellence consistent phase, many factors are taken into
account ponent layout and line protracted. (2) Application of high
speed Digital Signal Processor. Considering of plexity of the system
arithmetics and the high requirements in time property, the Digital Signal
Processor was chosen TMS320DM642 (TI Corp).The processor supports
excellently the realization of WM9 encoder arithmetics and FAT32 file
system .(3) The hardware system adopt high speed PCB design, sufficiently
take into account ism disturb and signal transmission line
disposal, guarantee the stability of the whole system .
In the design of the hardware system, we lay e