去交错亦称“反交错”（deinterlacing）是将交错式（即隔行扫描）（interlace）影像信号转换为渐进式（逐行扫描）（progressive）影像信号的一种方法。

因为设备处理速度以及带宽的限制下，广播电视系统，例如NTSC或是PAL，都是使用交错式信号取代渐进式信号。但是现代新型的显示设备例如液晶显示器、电浆显示器、数字投影机或是数字微型反射镜（DLP，数字光处理）等，都只支持逐行扫描（progressive scan），因此在这些设备上需要有去交错的功能以将交错式信号转换为逐行信号。

Deinterlacing is the process of converting interlaced video, such as common analog television signals or 1080i format HDTV signals, into a non-interlaced form.

Interlaced video frame consists of two sub-fields taken in sequence, each sequentially scanned at odd then even lines of the image sensor; analog television employed this technique because it allowed for less transmission bandwidth and further eliminated the perceived flicker that a similar frame rate would give using progressive scan. CRT based displays were able to display interlaced video correctly due to its complete analogue nature. All of the newer displays are inherently digital in that the display comprises discrete pixels. Consequently the two fields need to be combined into a single frame, which leads to various visual defects which the deinterlacing process should try to minimise.