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While it's easy to explain what high-definition is,
when we start to implement it, things get wildly out of control.
For instance, here are just 10 HD formats which are commonly available, starting with
HDV and DVCPro HD working through ProRes and HDCAM SR at the high end and some
of the new formats of AVC-Intra and AVCHD. These HD formats divide into two broad categories,
those which are I-frame based and those which are GOP-based.
And we'll be talking more about this compression a little bit later in this training.
There's four that are I-frame compressed DVCPro HD, ProRes, HDCAM and HDCAM SR and I-frame
is easier to edit and generally quicker, but the file sizes
are bigger. GOP files are smaller, but sometimes can be
much, much harder to edit, and that has an impact on us when we're trying
to meet deadlines using our high definition work.
But there's more than just different HD formats. There's also different file storage sizes
and we'll talk about those next.