| There are currently three major variations of the video format definitions for analog and digital video delivery.
DV – is a digital compressed format that takes the incoming image from the camera image CCD(s) and compresses it when written on the tape cassette as a 5:1 compressed format. The 4:1:1 color space is slightly less sampling than the uncompressed formats.
The DV Format is explained here
SD – Standard Def is the format that has been used in television since 1949 in the United States and later in other countries. The uncompressed format uses a 4:2:2 color space when captured as a digital format and maximum chrominance and luminance when captured as an analog format. The digital format is typically known as SDI or Serial Digital Interface
HD – High Def is the latest of the delivery formats to come and is the future for television and other forms of video delivery. There are several pixel image size formats that supercede all other common formats. Available are 720p (Progressive scan), 1080i (Interlaced) and 1080p (Progressive scan). There are both 4:2:2 and 4:4:4 color spaces available within HD content and both 8 and 10 bit digital video streams.
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