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January 24, 2005

Everything there is to know about Digital Video tape
As part of the HDV workflow presentation, I learned more than I ever wanted to know about how digital tape is made. Digital Master Media is made by evaporating metal and getting it to adhere (in two layers) to the Mylar base. The particles are laid down in the direction of the heads. According to technical director Wayne Desmond, that means better carrier-to-noise ratio, reduced dropouts (when the head doesn't touch the tape) and fewer errors (misreading of the data). In HDV recording, 25 million bits of data are read per second. The high end tape has a 4dB greater carrier-to-noise ratio. I guess that explains why it costs four times as much. While it may seem costly, it's certainly worth it if you're mastering your film on DV.

(Continued at Cinema Minima)
Posted by yatta at 12:39 PM