基于TMS320DM643加解密实验系统视频加解密功能改进研究
关键字：数字信号处理、TMS320DM643、视频加解密、Hill 密码
Title The Improvement on Video Encryption & Decryption of Cryptosystem
Based on TMS320DM643
Abstract
Based on TMS320DM643, SEED-DEC643 is a platform designed to fulfill the
cryptosystem of different kinds of messages, including text, audio, image, and
video. This paper is concerned with the video encryption & decryption part of
SEED-DEC643 platform. The ultimate goal is to improve the demonstration of
encrypted video by optimizing encryption algorithm. Background knowledge is
introduced in the beginning, such as Digital Signal Processing, Internet
Information Security and Cryptography, and video encryption techniques. After
analyzing its hardware system and software system, an encryption method in
combination of permutation and Hill Password is transplanted into the platform.
Finally, several problems in this paper that needs further researching are listed.
Keywords: Digital Signal Processing, TMS320DM643, Video Encryption &
Decryption, Hill Password
目 次
1 绪论 1
1. 1 数字信号处理 · 1
1. 2 信息安全及密码学 2
1. 3 彩色数字图像基础 3
1. 4 视频加解密 · 4
1. 5 本文的主要任务 5
2 硬件系统分析 · 6
2. 1 主控模块 · 6
2. 2 视频解码电路 11
2. 3 视频编码电路 13
3 软件系统分析 · 15
3. 1 集成开发环境 16
3. 2 视频采集任务 20
3. 3 视频显示任务 21
3. 4 网络收发任务 · · 22
3. 5 加解密任务 24
4 系统实现及改善 · · · 27
4. 1 系统实现 · 27
4. 2 简单代换加密 29
4. 3 置换法加密 31
4. 4 Hill 密码加密 · · 33
5 总结与展望 · 38
5. 1 本文的贡献 38
5. 2 今后要做的工作 38
致谢 39
参考文献 40
1 绪 论
基于 TMS320DM643 的视频加解密实验系统属于嵌入式系统在视频领域的
应用，主要涉及了嵌入式系统、数字图像处理以及密码学等背景知识。