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Digital video is a type of video recording system that works by using a digital, rather than analog, representation of the video signal. This generic term is not to be confused with the name DV, which is a specific type of digital video. Digital video is most often recorded on tape, then distributed on optical discs, usually DVDs. There are exceptions, such as camcorders that record directly to DVDs, and Digital8 camcorders which encode digital video on conventional analog tapes.

The terms "camera", "video camera", and "camcorder" are used interchangeably in this article.

Introduction


Video cameras come in two different image capture formats: interlaced and progressive scan. Interlaced cameras record the image in alternating sets of lines: the odd-numbered lines are scanned, and then the even-numbered lines are scanned, then the odd-numbered lines are scanned again, and so on. One set of odd or even lines is referred to as a “field”, and a consecutive pairing of two fields of opposite parity is called a frame.

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