The U on iTunes U - Terms

Non-linear Editing System (NLE)

A non-linear editing system (NLE) is a video editing (NLVE) or audio editing (NLAE) system which can perform random access on the source material.

n non-linear editing, the original source files are not lost or modified during editing. Professional editing software records the decisions of the editor in an edit decision list (EDL) which can be interchanged with other editing tools. Many generations and variations of the original source files can exist without needing to store many different copies, allowing for very flexible editing. It also makes it easy to change cuts and undo previous decisions simply by editing the edit decision list (without having to have the actual film data duplicated). Loss of quality is also avoided due to not having to repeatedly re-encode the data when different effects are applied.

A computer for non-linear editing of video will usually have a video capture card for capturing analog video or a FireWire connection for capturing digital video from a DV camera, as well as video editing software. Modern web based editing systems can take video directly from a camera phone over a GPRS or 3G mobile connection, and editing can take place through a web browser interface, so strictly speaking a computer for video editing does not require any installed hardware or software beyond a web browser and an internet connection.

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