HDV

From MITVWiki

From wikipedia:

High Definition Video (HDV) is a video format designed to record compressed HDTV video on standard DV or MiniDV cassette tapes. However, many HDV users purchase either "master" quality Mini-DV tapes or specially formulated HDV tapes.

Although HDV and DV share the same tape format and the same recorded datarate, they use completely different video compression technology. HDV is able to achieve a much higher compression ratio than DV, but at the cost of motion-induced artifacts in scenes of complex motion. These are imperceptible for static shots and gentle pans, but may become increasingly detracting as motion complexity increases. For example, a moving riverbed may exhibit regions of picture breakup, depending on its portion of the total screen area. It is important to view these limitations in the proper context. Lighting, chroma content, camera motion, etc all play a role in the potential for artifacts.

On the other hand, DV is free of motion-induced artifacts, but DV tends to look fuzzy when scaled up to HD resolutions. Subjectively, most observers are willing to accept HDV's visual artifacts in exchange for a more detailed picture on HD displays.