Glossary
Throughout this book, specialized terms will be used that relate to video and audio technology and to nonlinear post-production in particular. If you are learning to edit for the first time, several of these may be new or perplexing to you. This glossary is designed to help. Return to it when you need an explanation or a reminder as you explore the lessons in this book.
Alpha channel: A nonvisible channel that defines the opacity of a pixel. This fourth channel is stored in a very similar way to the three visible color channels (see RGB color) and can be adjusted in a multitude of ways using manual adjustments or visual effects. When you create a greenscreen effect, for example, Premiere Pro adjusts the alpha channel level for your ...
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