创作设计说明书
嵌入式音视频数据采集模块的设计
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目录
目 录
目 录 ............................................................................................................................. I 摘 要 ........................................................................................................................... 1 ABSTRACT .................................................................................................................. 2 第一章 序言 ................................................................................................................. 3
1.1 课题目的 ......................................................................................................... 3 1.2 资料调研分析 ................................................................................................. 3 1.3 设计简介 ......................................................................................................... 3 第二章 设计要求及方案的确定 ................................................................................. 5 2.1 设计要求 ......................................................................................................... 5 2.2 方案的确定 ..................................................................................................... 5 2.2.1 方案的实现 ............................................................................................... 5 2.2.2 设计流程 ................................................................................................... 6 第三章开发环境的搭建及硬件系统 ........................................................................... 9 3.1 软件开发环境的搭建 ..................................................................................... 9 3.2 硬件系统 ....................................................................................................... 10 3.2.1凌阳 cortex A8开发板简介 ................................................................... 10 3.2.2音频输出接口和麦克风 .......................................................................... 12 3.2.3 电容屏输出接口 ..................................................................................... 13 3.2.4 USB2.0 HOST 接口 ................................................................................ 15 3.2.5摄像头外设 .............................................................................................. 16 3.2.6串口及串口电路 ...................................................................................... 17 第四章 音视频程序的设计与功能实现 ................................................................... 19 4.1 主界面的设计及功能实现 ........................................................................... 19 4.1.1 主界面的设计 ......................................................................................... 19 4.1.2 功能实现 ................................................................................................. 19 4.2 录放音界面的设计及功能实现 ................................................................... 21 4.2.1 录音界面的设计 ..................................................................................... 21 4.2.2 录音界面功能的实现 ............................................................................. 22 4.2.3 放音界面的设计 ..................................................................................... 22 4.2.4 放音界面功能的实现 ............................................................................. 22 4.3 录像、拍照界面的设计及功能实现 ........................................................... 24 4.3.1 录像、拍照界面的设计 ......................................................................... 24 4.3.2 录像功能的实现 ..................................................................................... 24 4.3.3 拍照功能的实现 ..................................................................................... 25
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4.4 播放视频、图片界面设计及功能实现 ....................................................... 27 4.4.1 播放视频界面设计 ................................................................................. 27 4.4.2 播放视频界面功能的实现 ..................................................................... 27 4.4.3 图片浏览界面的设计 ............................................................................. 28 4.4.4 图片浏览界面功能的实现 ..................................................................... 28 第五章 功能测试与BUG分析 ................................................................................. 30 5.1 功能测 ........................................................................................................... 30 5.2 BUG分析与解决 ........................................................................................... 30 结论 ............................................................................................................................. 33 致谢 ............................................................................................................................. 34 参考文献 ..................................................................................................................... 35 附录 ............................................................................................................................. 36
摘要
摘 要
嵌入式音视频数据采集的设计，是以Linux系统为开发环境，cortoex A8开发板作为硬件开发平台，结合linux C语言开发而成的。使用麦克风、摄像头、扬声器和电容屏等硬件设备，通过linux c程序编程对开发板的麦克风进行录音，采集音频数据，存储录音文件，并使用扬声器播放录制的音频，完成对音频数据的采集功能。把摄像头插到开发板上，通过程序读写音视频设备使摄像头采集实时采集图像数据，存储为图片和视频，显示在电容屏上，并实现拍照，照片浏览、录像、播放录像等视频数据采集功能。
关键字 ：linux C 、cortex A8 开发板、麦克风、摄像头、扬声器、电容屏
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摘要
Abstract
The design of the embedded audio and video data collection is based on Linux system as the development environment , cortoex A8 development board as hardware development platform, combined with Linux C language development, The design uses the microphone, camera, speakers and capacitance screen devices of hardware to collect data .The first, using Linux c programs for the microphone of development board to collect the data of audio .the second the design will save the recording file, and use the speaker to play the recorded audio.Then it can complete the function of audio data acquisition.Pluging the camera into development board, it makes the camera to collect real-time acquisition with the program to read and write av equipment.the date of Image will be stored as images and video. It shows in the capacitance screen. It can realize function of the photo and photo browsing, video recording, video playing and video data acquisition .
Keywords： linux C, cortexA8 development board, microphone, camera, speaker,capacitive screen