中国空间科学技术

中国空间科学技术

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大容量信息实时传输技术研究

潘力均,许滨,张珩   

  1. 中国科学院力学研究所!北京100080,中国科学院力学研究所!北京100080,中国科学院力学研究所!北京100080
  • 发布日期:2000-04-25

Research of the Real-time Transmission Technology with Large Amount Data

Pan Lijun Xu Bin Zhang Heng (Institute of Mechanics,Chinese Academy of Science,Beijing 100080)   

  • Online:2000-04-25

被引次数

11

摘要： 在信道带宽受限的条件下 ,实现大容量信息的实时传输是面向空间应用的遥科学技术要解决的核心问题之一。提出了将双总线寻址与双 Buffer相结合的技术结构 ,从而实现了在规定的传输协议、规定的信道链路带宽的约束条件下 ,视频图像的实时无缝传输与主动遥操作。通过一些关键性技术难点的突破 ,达到了在 2 Mbit/ s码速率下按 CCSDS (空间数据系统协调委员会 )的位流协议在地基上实时复现出高质量的视频图像序列

关键词: 遥科学, 视频信号, 实时处理

Abstract: It is one of the key problems in the telescience technology of the space application that the real-time transmission of large amount data is achieved under the condition of the constrained message channel bandwith.A new idea is presented by combining double-bus with double-buffer.It is realized to provide the video image real-time seamless transmission and active teleoperation under the constrained condition of the fixed transmission protocol and message channel bandwith.As some key technologies have been solved,the high qualitative video image sequence can real-timely be redisplayed (when video image data is compressed to 20fold,the signal-to-noise rate is 38dB) at 2Mbit/s on ground according to CCSDS (Counsel Committee of Space Data System) bitflow protocol.