大容量信息实时传输技术研究

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、规定的信息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２Ｍｂｉｔ／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。

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

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.