空间数cb5f据和信息传输系统 - 数cb50716f字运动图像

[中文适用范围]： 本文件旨在为数字运动视频和影像提供一个共同的参考框架，推荐使用国际标准在航天器元素和地面系统之间共享或分发运动视频和影像。 该范围包括实时流媒体视频和电视，包括载人和机器人航天器之间的视频以及航天器与地面系统的视频。还包括记录后延迟分发的视频，无论是实时流还是文件传输。 本上下文中，实时流是指从航天器连续发送并在接收时立即使用的视频，无论传输路径的延迟如何。 其他专业运动影像应用（如高速科学视频和多光谱运动影像）不在本文件范围内。但如果一个专用影像摄像系统需要以视频模式与航天器系统接口，则必须符合这些接口要求。 地面系统之间的视频分发是整个视频系统的关键组成部分，但这不是本文件的主要关注点。 目前，不同空间机构在地面上交换任务视频产品的方式存在显著差异，这是由于各空间机构的网络拓扑结构和视频共享协议的不同所致。 在视频图像传输之前，应进行地面系统的设计审查和性能测试，以确保其互操作性。 [外文原描述]： The purpose of this document is to provide a common reference and framework of standards for digital motion video and imagery, and to provide recommendations for utilization of international standards for sharing or distributing motion video and imagery between spacecraft elements and ground systems. The scope of this document includes traditional real-time streaming video and television, including human and robotic spacecraft-to-spacecraft and spacecraft-to-ground systems, as well as video recorded and distributed later, either as a real-time stream or as a file transfer. In this context, real-time streaming includes all modes where video is sent from a spacecraft in a continuous stream and is intended for immediate use when received, regardless of the latency of the transmission path. Other specialized motion imagery applications, such as high-speed scientific motion imagery and multi-spectral motion imagery, are not addressed in this document. However, if a specialized imagery camera system has a requirement to interface to spacecraft systems in a video mode, it would be required to match these interfaces. Ground-systems-to-ground-systems video distribution is obviously a key component of the entire video system. However, this is not the primary focus of this document. Currently, there are significant differences in the ways mission video products are exchanged between the various space agencies on the ground. This is the result of differences in network topologies between space agencies, and agreements for video sharing. Those differences preclude there being a standard methodology for delivering video imagery between agencies. Prior to the commencement of video transmission between space agencies, system design reviews and performance testing should be done between the ground systems in use to assure operability when video imagery comes from spacecraft.