Next the DV video decoder might convert the interlaced video fields presented by the camcorder into non-interlaced video images. Using interlacing, a single frame of video imagery is actually broken down into two fields. The first field contains all the odd-numbered lines of video information, while the second field contains all the even-numbered lines. The two fields must be combined—that is, de-interlaced—to produce the non-interlaced (also known as progressive scan) image used on nearly all computer displays.
What's the benifit that a camcorder prefers interlaced format?