Video Monitoring Solution to South-to-North Water Diversion Project Under Heterogeneous Network
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摘要: 针对南水北调中线工程在异构网络下的视频监控传输问题,提出了一套包括基于网络状况的带宽评估方法,以及参数可调的网络视频编码传输方式的异构网络视频监控解决方案. 该方案对南水北调工程异构网络环境下视频监控系统的整体架构进行了设计,并基于实时传输协议/实时传输控制协议(RTP/RTCP)对网络参数进行了评估. 在得出的网络带宽评估结果基础上,设计了一种码率可调的编码传输方案. 最后结合所实现的系统,对系统性能进行了详细测试和分析. 通过在南水北调中线工程的实际应用证明,本系统能够对当前带宽下的视频编码进行优化,提高异构网络下的视频编码传输效率,且性能指标达到了4路720P视频监控的设计要求.
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关键词:
- 异构网络 /
- 视频监控系统 /
- 实时传输协议/实时传输控制协议(RTP/RTCP) /
- H.264视频编码 /
- 带宽自适应
Abstract: A video monitoring scheme of video was proposed under a heterogeneous network, which included a network condition evaluation method and a video coding method under network with adjustable parameters. Firstly, a model of the video monitoring system for the south-to-north water diversion project under heterogeneous network was proposed. Secondly, a network parameters evaluating method based on the real-time transport protocol/real-time transport control protocol (RTP/RTCP) was presented to improve video coding efficiency with adjustable parameters. Finally, the performance of the video monitoring scheme was proved by the system deployed in the middle route of south-to-north water diversion project. The performance of the video coding in current bandwidth and the video transmission efficiency were improved under heterogeneous network. The video monitoring system met the design requirements of four channel 720P video monitoring. -
图 1 异构网络下的视频监控系统模型
Figure 1. Model of video surveillance system in heterogeneous networks
图 3 基于帧差图像的可调码率视频编码流程
Figure 3. Frame difference image based variable rate video coding process
图 6 基于RTP/RTCP的网络状况评估及码率调节结果
Figure 6. Network condition evaluation and rate adjustment result based on RTP/RTCP
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