为实现隔行扫描到逐行扫描的视频扫描格式转换，提出了一种时空权重和边缘自适应的去隔行算法，主要包括运动估计、小角度边缘搜索、时空权重计算、自适应插值等。该算法通过4场相邻像素的最大灰度变化与运动阈值比较实现对当前像素的运动估计，采用自适应搜索半径和并行搜索树的方法实现小角度边缘检测，并且增加对半像素边缘的考虑实现最小6°边缘的检测，最后通过时空权重自适应的插值算法实现去隔行处理，取得很好的处理效果。

This paper has analyzed deficiencies with the current aircrew escape system for sub-plateau regions and a proposal has been put forward that the ejection seat is to be equipped with a dual mode sequencer including mechanical and electrical sequencers, so as to ensure safe escape, under the condition that the current equipment configuration is kept unchanged,  in sub-plateau regions and without reducing escape performance at low altitude under adverse attitude conditions in plain regions.

苏炳君（1964－），男，河北故城县人，航宇救生装备有限公司研究员，北京航空航天大学博士研究生