摘要
设计光纤网络中视频数据双向传输系统,提升不同环境下双向传输效果,降低双向传输误差。发送端利用视频发射模块修补需传输的视频数据,获取基带视频数据;信号调理模块利用最小二乘曲线拟合方法,获取基带视频数据传输时的误差曲线,将该曲线与理论曲线相加,分析应输入信号调理模块的数据,补偿数据传输误差;利用模/数转换模块变更补偿后的数据,获取数字视频信号;通过复杂可编程逻辑器件处理数字视频信号,令发送端与接收端的时钟同步;确保发送端与接收端的时钟同步后,利用可编程器件压缩、编码与串并转换数字视频信号,获取高速串行数据流,传输至光收发一体化模块,经由光纤网络传输至接收端;接收端为发送端的逆过程,完成视频数据双向传输。实验证明:在不同环境下,该系统均可有效双向传输视频数据,且视频数据传输质量较高;该系统可精准转换视频数据;不同丢包率时,该系统双向传输的峰值信噪比均较高,双向传输效果较优。
The bidirectional video data transmission system in an optical fiber network is designed to improve the bidirectional transmission effect in different environments and reduce bidirectional transmission errors. The transmitting end uses the video transmitting module to repair the video data to be transmitted and obtain the baseband video data. The signal conditioning module uses the least square curve fitting method to obtain the error curve of baseband video data transmission, and then adds the curve with the theoretical curve to analyze the data that should be input into the signal conditioning module to compensate for the data transmission error. The digital video signal is obtained by using the compensated data of the analog/digital conversion module. Digital video signal is processed by a complex programmable logic device to synchronize the clocks of the sender and the receiver. After ensuring the clock synchronization, the digital video signal is compressed, encoded and converted into serial by programmable devices to obtain high-speed serial data flow, which is transmitted to the optical transceiver integrated module and transmitted to the receiver through the optical fiber network. The receiving end is the reverse process of the sending end to complete the two-way transmission of video data. Experimental results show that the system can effectively transmit two-way video data in different environments, and the video data transmission quality is high. The system can accurately convert video data. When the packet loss rate is different, the PSNR of bidirectional transmission is higher and the bidirectional transmission effect is better.
作者
陈阳
CHEN Yang(Zhengzhou Business University,Gongyi Henan 451200,China)
出处
《激光杂志》
CAS
北大核心
2022年第11期93-98,共6页
Laser Journal
基金
河南省高新技术领域科技攻关项目(No.162102210168)。
关键词
光纤网络
视频数据
双向传输
发送端
接收端
最小二乘曲线
optical fiber network
video data
bidirectional transmission
the sender
the receiver
least squares curve
