基于TMS320DM355的MAV机载视频传输系统的设计与实现  

Design and Implementation of Video Transmission System of MAV Based on TMS320DM355

作　　者：姜蓉蓉[1] 周建江[1] 

机构地区：[1]南京航空航天大学电子信息工程学院,南京210016

出　　处：《电光与控制》2013年第1期56-60,共5页Electronics Optics & Control

摘　　要：为了提高微型飞行器(MAV)无线视频传输的质量、扩大传输距离,设计并实现了一种基于3G WCDMA无线网络的机载视频传输系统。采用TI公司的达芬奇处理器TMS320DM355作为核心处理器,给出了总体设计方案和硬件结构,并阐述了采用PPP协议拨号接入WCDMA网络的方法。采用嵌入式Linux操作系统作为软件开发平台,分析并设计了基于V4L2(Video For Linux Two)驱动的视频采集模块。通过调用TI提供的编解码引擎API,实现了视频MPEG-4压缩编码处理。针对视频传输的实时性要求,采用了实时传输协议RTP和实时传输控制协议RTCP,重点阐述了MPEG-4视频的RTP封包策略,并基于JRTPLIB库文件实现了视频的实时传输功能。实验结果表明,该系统可以满足视频清晰、实时的传输要求。A video transmission system based on 3G WCDMA wireless network used in Micro Air Vehicle （MAV） was designed and implemented in order to improve the quality of video transmission and extend the transmission distance. The overall design and hardware architecture of the system were given, using TI DaVinci processor TMS320DM355 as the core processor. The method for accessing WCDMA network using PPP dial-up was described. Video capture module based on V4L2 （Video For Linux Two） was analyzed and designed, using embedded Linux operating system as the software development platform. The MPEG-4 compression and encoding process was implemented by calling Codee Engine API provided by TI. Real-time Transport Protocol （RTP） and Real-time Transport Control Protocol （RTCP） were used for the real-time video transmission requirement. The RTP packet strategy for MPEG-4 videos was described in detail, and the real-time video transmission was implemented based on JRTPLIB library. Experiments showed that the system can satisfy the requirements for video transmission in clarity and real-time performance.

关 键 词：视频传输 微型飞行器 MPEG-4 3G无线网 RTP RTCP 

分 类 号：V271.4[航空宇航科学与技术—飞行器设计]