<title>Video switching, recording, and distribution for engineering flight simulation</title>

Abstract

In the engineering flight simulation environment, due to functional and flexibility requirements, it is often necessary to change video routing in real—time. As facilities grow to include multiple Image Generators (IGs), domes (including projectors), and System Control Stations (SCS), the requirements for video switching grow geometrically. Video recording is often required for studies and data collection purposes. However, due to the nature of computer generated Imagery (high line—rates and separate red, green, and blue (RGB}) most of the video is not in an acceptable format for recording. Therefore, various means are required to convert the video to commercial standards for recording. After the video is in the proper format, recording, editing, and playback can be performed. If playback is required on a monitor normally used for IG video (ie. RGB) the video needs to be converted back again. Sometimes a study will require recording of multiple sources from various formats, with various special effects (split screens, overlays, etc.) on multiple recorders. McDonnell Douglas Helicopter Company's approach to meeting the requirements of video switching, recording, and distribution for engineering flight simulation was to bring all the video sources into a central point called the Facility Video Switching and Distribution (FVSD) system. The FVSD allows the user to quickly configure the video system before and during a simulation with touch screens. It also permits mission related switching under computer control, video recording of multiple video formats with some special effects capability including time code, and video distribution. This paper will discuss the design and implementation of the FVSD system in the Simulation Systems Group at McDonnell Douglas.