Bob

When watching DVD, video content encoded from an interlaced signal would use the bob mode, a deinterlacing technique as opposed to weave.

Bob plays video content at twice it's frame rate while each frame is displayed in only one of the fields. This makes the image appear to bob up and down a bit, especially when text is displayed, but doing so eliminates horizontal streaking. The bob mode is only useful for NTSC/PAL content such as movie trailers.