As mister Hatt says, DV is interlaced...
DV was based around recording SD TV broadcasts (NTSC, PAL, etc) which are interlacedhttp://en.wikipedia.org/wiki/DV
"Closely following ITU-R Rec. 601 standard, DV video employs interlaced video scanning with the luminance sampling frequency of 13.5 MHz. This results in 480 scanlines per complete frame for the 60 Hz system, and 576 scanlines per complete frame for the 50 Hz system. In both systems the active area contains 720 pixels per scanline, with 704 pixels used for content and 16 pixels on the sides left for digital blanking. The same frame size is used for 4:3 and 16:9 frame aspect ratios, resulting in different pixel aspect ratios for fullscreen and widescreen video."
"All DV variants except for DVCPRO Progressive are recorded to tape within interlaced video stream. Film-like frame rates are possible by using pulldown. DVCPRO HD supports native progressive format when recorded to P2 memory cards."