论文总字数：21012字

摘 要

随着视频技术(包括视频信号的压缩、传输及存储)和高性能大规模集成电路的发展，视频监控系统的应用越来越广泛。作为其核心的视频采集技术也口趋成熟，可用于视频采集卡设计的集成芯片种类繁多。基于HI3515的视频采集卡以其强大而灵活的功能，低廉的价格成为市场的主流产品。

在对当前技术仔细分析的基础上，本文设计了一块基于HI3515的视频采集卡。该视频采集卡的硬件设计主要包括视频信号采集和处理电路两部分。

本设计中采用HI3515芯片作为视频采集模块的主芯片，并采用与之相配套的A/D芯片。先用A/D芯片将音视频信号转化为数字音视频信号然后通过HI3515芯片对其进行处理，最后通过显示屏播放出来。

视频采集卡的硬件设计是在AD10环境下完成的。在系统地了解芯片的功能特性之后，设计出电路原理图，然后结合抗干扰性能及走线的整体布局完成印届口电路板设计。

本文完成了基于HI3515的视频采集卡的硬件设计，为图像的采集和传输提供了良好的硬件基础。该视频采集卡具有很高的实用价值，可用于多种视频图像采集场合。

关键词: 视频采集卡，HI3515, A/D，视频监控

ABSTRACT

With the high-speed development of video technology (including compression,transmission and storage of video signal) and VLSI, the video monitor system has been widely used in many fields. As the central part of video monitor system, the technology of image grab card has become more and more mature, and there are many kinds of chips that can be used in design. Among them, the image grab card based on HI3515 is the most popular product in the market because of its strength, flexibility and cheapness.

Based on the careful analysis of the current technology ,an image grab card is designed based on the HI3515 In this paper . The hardware design of image grab card mainly includes two modules: Video signal acquisition and processing circuit.

associated with the A/D chip , This design adopts HI3515 chips as the main chip of video acquisition module. the A/D chip first convert analog video signal into digital video signal and then chip processing by HI3515, finally they are displayed by the display screen.

The hardware of the image grab is designed in AD10. On the basis of thoroughly understanding the character of the chip by the datasheet, we devise the theoretical image. Then taking into account the performance of the antijam and the global distribution of lines, the printed circuit is designed.

this paper implements the design of image grab card based on HI3515 and this card provides excellent hardware for image acquisition and transfer. This image grab card has the sky-high practicality and could apply to many image grab fields.

KEY WORDS: Imgae Grab Card, HI3515, A/D, Video Monitor

目 录

目 录 2

第一章 绪论 1

1.1视频采集卡的简单介绍 1

1.1.1视频采集卡的发展历程 1

1.1.2视频采集卡的分类 2

1.1.3视频采集卡的原理 3

1.2视频采集卡设计的实际意义及任务 3

第二章视频信号采集原理 2

2. 1视频信号采集概述 2

2.2模拟视频基础 2

2.2.1电视的扫描 2

2.2.2视频信号的形式 3

2.3数字视频基础 4

2.3.1数字视频的采样格式 5

2.3.2数字视频压缩简介 5

第三章 硬件系统分析 6

3.1CPU模块 7

3.1.1 Hi3515 芯片特点 7

3.12视频处理单元 8

3.1.3多端口 DDR SDRAM 存储控制器 9

3.1.4音频接口 9

3.1.5 视频输入单元VIU 10

3.16视频输出单元VOU 11

3.2 A/D 转换模块 13

3.3 以太网接口模块 14

3.4 电源模块 15

3.5 存储模块 17

3.51 DDR2控制器 17

3.52 NAND Flash 控制器 18

3.6 本章小结 19

第四章 硬件电路设计 20

4. 1原理图设计 20

4.1.1视频输入接口设计 20

4.1.2视频输出接口设计 21

4.1.3音频接口设计 22

4.1.4 DDR2接口设计 23

4.1.5 Flash接口设计 24

4. 2 PCB板设计 24

4.2.1 PCB板布局原则 24

总结 26

参考文献 27

附录 29

第一章 绪论

1.1视频采集卡的简单介绍

近年来，视频监控在人们的生活中起着越来越重要的作用，相关的研究也取得了很大进步。国内外现有的数字硬盘录像机主要有两种，分别为基于PC的硬盘录像机和嵌入式硬盘录像机。

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