基于GTP收发器的水下高清视频光纤传输系统设计

为提升海底视频监测能力,提出了一种基于Xilinx高速串行收发器(GTP收发器)的水下高清视频光纤传输系统。该系统以GTP收发器为核心,实现了光纤传输中一系列的数据处理和转换,最终实现了高清视频和串口数据的光纤传输。     

便携式光纤动态传输系统技术研究

文章介绍了一种重量轻、体积小、便于人员携带的光纤动态传输系统,该系统以小型线团、单波长双向光端机为核心,实现了光纤动态释放与传输.实验结果表明,在便携式光纤动态传输系统中,光纤释放安全可靠,传输系统性能优良,可应用于人员携带的光纤传输领域.     

基于物理双通道的视频监控安全接入技术

根据视频监控系统可区分视频流和控制信息流,且视频流单向流动,控制信息流双向流动的特点,提出了基于物理双通道技术的视频监控安全接人技术,即利用单向通道传输视频流数据,双向数据交换通道传输控制流数据。辅以视频协议检查等其他技术,实现了安全的视频监控安全接人系统,并以目前流行的基于SIP协议的视频监控系统为例进行了分析和具体实现。     

基于FPGA的光纤与1.4标准HDMI接口转换方法

为实现高清视频的远距离传输,设计了一种基于FPGA实现高清视频在光纤和HDMI接口之间转换的方案.利用光纤通道接口控制芯片、HDMI收发处理芯片、FPGA等核心器件,通过FPGA编程对高清视频数据进行串行化处理,实现高清信号在光纤信道中的传输.方案可以有效延长高清信号传输距离并提高视频分辨率,广泛用于室外大型高清显示设备.     

双向混合信号光纤传输系统的设计与实现

介绍了一种新的多路信号光纤数字化传输方法,基于FPGA设计了混合信号光纤传输系统,并通过实验验证了系统的准确性.该系统不仅能传输模拟信号还能传输数字信号,不仅能传输低速数字信号还能传输高速脉冲信号,此外还能实现双向CAN通信.     

多路视频双向光纤传输系统的研究

为了满足多路视频信号安全可靠的传输,研究了一种多路视频双向光纤传输系统.该系统能够实现16路视频信号的双向传输,满足某些特定场合的应用需求.阐述了该系统的基本原理,并给出了其框架结构,同时对关键模块进行了相关设计.     

Blackfin DSP高效率视频数据采集机制的设计

视频数据的采集是实时视频编码系统中的主要任务之一,视频数据的采集机制决定着整个系统的性能.在研究了实时视频采集、编码和传输系统的特点后,针对Blackfin媒体信号处理器的硬件资源,提出了采集、编码、传输并行处理的方法,设计了一种实用、高效的视频数据采集机制.该机制已成功地应用于笔者基于Blackfin533开发的H.263和MPEG-4实时视频编码系统中,以及基于Blackfin561开发的H.264编码系统中.     

高清视频光纤传输技术

为了将一种基于通道链路(Channel Link)技术的专用接口格式的相机高清视频图像进行高速无压缩光纤传输,采用了对相机信号直接高速采样、数据无损处理和编码传输的设计方法.通过自制相机信号源进行传输验证和使用实物相机进行高清视频图像实时传输实验,获得了监视器视频图像显示正常、信号时序无变化的结果,从而表明传输系统满足高清视频图像传输要求,具有高速、无视频丢帧和链路同步快的特点.     

发射机

0320085远程视频传输和实时采集系统设计[刊]/张红霞//电视技术.—2003,(4).—75～77(L)设计一种基于 PCI (外设部件互连)总线的远程光纤视频传输和实时采集系统,视频传输采用光纤作为传输介质,模拟视频信号经光发射机转换为光信号后     

光纤混沌双向保密通信系统研究

本文提出光纤混沌双向保密通信设想,通过耦合光注入半导体激光器激光混沌全光耦合反馈同步系统和光纤传输信道,建立了光纤混沌双向通信系统模型,数值实现了该系统在长距离光纤传输中的同步,详细地分析了系统同步时间随光纤传输长度的关系.证明了光纤的交叉相位调制是限制激光混沌在光纤传输中同步的主要原因,导出了系统传输的非线性相移.数值模拟了具有正弦调制信号的调制频率0.5GHz混沌模拟通信和数字信号调制速率0.4Gbit/s以及20Gbit/s的混沌数字通信以及调制速率0.05Gbit/s 混沌键控通信的应用,计算出光纤混沌数字通信速率和同步误差等关系,还特别分析了系统解码特性和调制带宽,表明系统具有非常好的保密性能和具有高速率通信的能力.光纤混沌双向保密通信是可以实现的.     

Synchronous quantized subcarrier multiplexing for transport ofvideo, voice, and data

A quantized subcarrier multiplexing approach for the transmission of video, voice, and data information over optical fiber networks is explored. The basis of this technique is to utilize a single high-speed analog-to-digital converter to digitize a composite analog signal. Conventional subcarrier multiplexing methods are used to form the composite from multiple NTSC video, voice, and data signals. The process of synchronous multiplexing, quantization, serialization, transmission, and waveform recovery is explored for an experimental prototype system. Noise performance and the impact on laser linearity requirements are discussed     

A 1.3-µm 35-km fiber-optic microwave multicarrier transmission system for satellite earth stations

A field experiment that transmits a full bandwidth of C-band satellite downlink signals over 35 km of 1.3-μm single-mode fiber was demonstrated. The major requirements of this analog fiber-optic link for video transmission, including system linearity and carrier-to-noise ratio, were experimentally characterized. Assessment of the system performance was based on measurement of video signal quality. A complete system analysis is given and the results agree well with the measured data.     

数字时分系统设计

提出了一个时分复用传输系统收发两端的结构原理图,介绍了核心器件DSP和 CPLD,设计了一个基于特殊帧结构的时分复用传输系统来传输视频信号、语音信号和数据信号.整个系统由发射、接收2块电路单元和光纤传输单元组成,阐述了系统的工作原理.     

基于TMS320DM6437的4通道视频数据的高速传输

采用TMS320DM6437处理器和TVP5158视频解码器为主器件,在无需外加时序控制下,可实现器件的无缝连接并完成4路视频信号的采集。采集到的4通道模拟信号解码后压缩成1路复合视频数据流并输入到DSP视频前端,DSP处理器需将复合数据流分离成4个单路信号,以供显示图像信息,此过程伴随大量的数据搬移。实验结果表明:通过DSP库函数读取并搬移图像数据速度慢,图像实时性能差;而采用EDMA3传输方式能很好地实现大量视频数据的快速搬移,使得图像实时显示速度可达到23.2 f/s(帧/秒),较传统方法在系统实时性能方面提升了22.5%,从而满足视频信号处理系统的高速实时性要求。     

Optical Fiber Supertrunking--A Performance Report on a Real-World System

This is a review of a Specific application for video interconnection on single-mode optical fiber Over a 13.9 mi path, covering system design, aerial and underground plant construction, terminal equipment selection, and operating results. Both digital and analog circuits are used in the system, and the economics and performance of the two approaches are compared. The digital equipment in installed transports four video Channels on a single-mode fiber using both 1300 nm and 1550 nm lasers, and the analog system is tested transperting both 8 and 12 channels per fiber. To explore the potential of the system, tests are run on a fiber path 27.8 mi (44.7 km) in length. Using actual costs, an updated economic comparison between fiber optic systems and FM video coaxial systems is made. The conclusion is drawn that analog fiber video transmission systems have been developed to the point where they offer economics and performance generally superior to, and reliability substantially better than, FM video coaxial systems. Both analog and digital fiber systems are shown to be capable of excellent quality video transmission through a path loss of over 25 dB.     

Ultra-Wideband Radio Signals Distribution in FTTH Networks

The use of an ultra-wideband (UWB) radio technique is proposed as a viable solution for the distribution of high-definition audio/video content in fiber-to-the-home (FTTH) networks. The approach suitability is demonstrated by the transmission of standards-based UWB signals at 1.25 Gb/s along different FTTH fiber links with 25 km up to 60 km of standard single-mode fiber length in a laboratory experiment. Experimental results suggest that orthogonal frequency-division-multiplexed UWB signals exhibit better transmission performance in FFTH networks than impulse radio UWB signals.     

Wide-Band Interactive Services Experiment (WISE): A First Test of Future Video Services

An experiment of wide-band switched interactive services (video services) is presented. The experiment, named WISE (Wide-Band Interactive Services Experiment) is limited to a small number of subscribers but is representative of a future domestic environment. After a brief presentation of the scope of the activity, the video services that have been implemented, both unidirectional and bidirectional, are described. The system organization, based on a wide-band switching matrix and on the transmission of video signals on a single optical fiber by wavelength-division multiplexing, is then discussed, and the solutions adopted for the transmission equipment are examined. The structure of the service center is afterwards described, together with the subscriber procedures required to access the different services. Finally, some improvements and future possible developments of wide-band interactire systems are briefly highlighted.     

基于光纤光栅的超宽带信号产生与传输

针对现有方法功率利用率低与调制实现困难的问题,采用基于光纤光栅（FBG）的超宽带（UWB）调制信号产生方法,建立了UWB信号产生系统。不仅可以实现UWB信号的调制,而且提高了产生信号的信噪比。实现了二进制相位调制（BPM）、脉冲幅度调制（PAM）和脉冲位置调制（PPM）等UWB信号产生。分析了光纤传输对产生信号的影响,...     

Configuration and Characteristics of a Fiber-Optic Video Distribution System

A multiservice fiber-optic subscriber system using wavelength division multiplexing technology has been developed by Nippon Telegraph and Telephone Corporation to provide both 64 kbits/s and broad-band communication services on a single multimode fiber. The subscriber network is formed in a star topology to facilitate bidirectional connection. The system was put in service in March, 1985, as part of the information network system (INS) model system. This paper describes the configuration and characteristics of the video distribution system of this fiber-optic subscriber system. The distribution system uses analog baseband video transmission at a 0.89μm wavelength. The video channel selection is made by an FDM video tuner installed in a central office. The overall performance successfully met design objectives.     

无人值守变电站视频监控系统深度解析

文中提出了将变电站视频监控系统与周界报警系统、消防系统和门禁系统通过全面布防、相互联动进行整合;用宽带代替2 M光纤大幅度提高传输信道的带宽,解决窄带宽引发的瓶颈问题;数字信号和视频信号在传输中的抗干扰措施。变电站视频监控系统经过这些改造,功能将更趋完善,运行更加稳定可靠,才能实现真正意义上的无人值守。