电视摄像机视场的某一部分含有一个被跟踪的目标,而且被一跟踪门所套住,跟踪门由来自摄像机同步脉冲的信号构成。对应于跟踪门的中心产生一个窄的基准脉冲,而视频信号被箝位到基准脉冲的基准电平上。当目标偏离跟踪门的中心时,产生误差信号,用这些误差信号来移动波门以保持其中心对准目标。本发明阐述了用于跟踪快速运动目标的改进的电视跟踪系统。电视跟踪系统的工作能力在很大程度上取决于它对所选定的目标和背景之间或 A portion of the television camera’s field of view contains a tracked target and is trapped by a tracking gate made up of signals from the camera sync pulse. A narrow reference pulse is generated at the center corresponding to the tracking gate, and the video signal is clamped to the reference level of the reference pulse. When the target deviates from the center of the tracking gate, an error signal is generated, which is used to move the gate to keep its center aligned with the target. The present invention sets forth an improved television tracking system for tracking fast moving objects. The ability of a TV tracking system to work depends very much on its ability to choose between a target and a background or