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Now when you are authoring DVDs, it's important to know the difference between duplication versus replication. Both are ways of creating DVDs, but here's the long and short of it. Duplication is basically when you duplicate a disc and you do it at home, like if you are burning it from your computer, that's referred to as duplication, or making a duplicate. The benefit of this, of course, is that it's very low cost, and it's very convenient. It's right there at your house, typically, and you could just make a bunch of a short copies, or a short order run. If you want, you could make one copy or 10, really, no big deal.
Now Replication is typically what we mean when referring to professional disc duplication. This is typically done at a very professional facility, often called a replication house or a replication facility, and this is much more expensive than just duplicating the discs on your own. However, the benefit of using a replication facility is that you'll have access to greater features, such as copy protection, which we'll look at in the next movie, and also reliable region encoding. Now one of things I should probably point out about exporting for a replication facility, that's why we create a DVD Masters and the DDP Image that we talked about when we were talking about building discs.
The DDP Image is something that many replication facilities require, and the DVD Master is something you have to actually record straight to DLT, or Digital Linear Tape, from your computer, so that's typically done for Replication. Another thing that's beneficial here is that if you're going to export on your own computer, you are going to duplicate DVDs, sometimes there's compatibility issues with like older DVD players or just quirky DVD players. Sometimes things will work in my Xbox 360 DVD player that won't work in a couple of other of my set top boxes, and vice versa.
It's kind of unpredictable, but when you have a professionally replicated disc, you're almost guaranteed pretty much universal playback on most set top players. So again, Duplication, amateur, done at home, cheap - Replication much more expensive and also much more powerful.
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