Are MiniDV tapes all the same?
November 18, 2005

Submitted by: Bconnors, via e-mail
Are there any differences between the various name brands of MiniDV tapes, especially in terms of color saturation?

Lori Grunin, senior editor
Short answer: there are no differences at all among the various tapes when it comes to any aspect of digital video quality, including color saturation. Unlike analog video, the digital-video quality is solely determined by your camcorder. Think of the tape as a long, flat hard drive--which it is, kind of. If you were recording to disc, you wouldn't expect, say, a Seagate drive to have better video quality than a Western Digital. The real differentiator between tapes is the stability and durability characteristics as you go down the line.

At the top of any manufacturer's line, you'll find DVCam tapes, which come in a MiniDV-size cassette and can be used in consumer camcorders. As professional media, they are manufacturered with tighter quality control than consumer media and tend to have a base film layer less prone to stretching, as well as a more sophisticated metallic coating for an enhanced ability to retain the magnetic charge. They also incorporate features to help reduce friction during recording and playback. You may also see references to cassettes with or without a chip--the former being more expensive, of course--but useful only if your camcorder supports it. (For specific features supported, you'll have to check your manual.)

The spec most frequently cited as an indicator of DV tape quality is the carrier-to-noise ratio (CNR or C/N), which is a measure of bit error--like signal-to-noise ratio, higher is better, since the error is in the denominator of the equation--and seems to vary as much as 4dB across the various tapes.

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