远程驾驶车辆车载视频传输系统的设计与实现  

Design and Implementation of In-vehicle Video Transmission System for Remote Driving Vehicles

作　　者：陈新 杨朝阳[1] 黄凯旋 付颖 CHEN Xin;YANG Zhaoyang;HUANG Kaixuan;FU Ying(School of Automotive Engineering,Hubei University of Automotive Technology,Shiyan,Hubei 442002,China)

机构地区：[1]湖北汽车工业学院汽车动力传动与电子控制湖北省重点实验室,湖北十堰442002

出　　处：《汽车零部件》2023年第11期4-10,共7页Automobile Parts

基　　金：湖北省汽车动力传动与控制工程技术研究中心创新平台建设(2019ZYYD019)。

摘　　要：为了使车辆在远程驾驶时回传至驾驶员处的视频画面流畅且延时尽可能小,基于NXP I.MX 8QuadMax车载嵌入式控制器设计了实时视频传输系统,该系统主要由视频采集、硬编码、视频推流以及驾驶舱端的视频拉流、解码几个部分组成。针对视频传输部分,实现了基于RTP协议的Socket-UDP和Socket-TCP两种推流技术,在公网环境下分别测试视频延时与画面的卡顿情况。实验表明:Socket-RTP协议下的视频延时要低于Socket-TCP协议,但丢包率要高于Socket-TCP协议。In order to make the vehicle in the remote driving back to the driver's video screen smooth and as small as possible delay,based on the NXP I.MX8 QuadMax in-vehicle embedded controller designed a real-time video transmission system,the main video stream acquisition,hard coding,video push stream,and the cockpit side of the video pull stream,decoding.The video transmission part of the design of the RTP protocol based on the Socket-UDP and Socket-TCP two kinds of push-flow technology,in the public network environment,respectively,to test the video delay and screen lagging situation.The test shows that the video delay under RTP protocol is lower than that of Socket-TCP protocol,but the packet loss rate is higher than that of Socket-TCP protocol.

关 键 词：远程驾驶 RTP UDP TCP 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]