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Grass Valley PROFILE FAMILY v.2.5 User Manual

Page 370

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Glossary

370

Profile Family

Drop-frame

In NTSC, you don’t actually get 30 frames per second; the real number is
about 29.97 fps. Timecode usually assumes 30 fps. To account for the
discrepancy, drop-frame timecode skips or drops two timecode values at the
beginning of every minute except every tenth minute. This allows timecode
to exactly match a real-time clock on 525/60 systems. This correction is not
needed on 625/50 systems because the frame rate is exactly 50 fps.

E to E (EE)

Electronics to Electronics mode routes audio and video input directly to
output.

Edit

The process of creating or refining a sequence of media (clips) in a specific
order.

EDL

An Edit Decision List is a list of events that include the source to be
recorded, and where to record it. In addition, an EDL can include
information about transitions (cuts, dissolves, wipes), transition durations,
effects, etc.

Factory default

The value assigned to a parameter as delivered from the factory. See Default.

Field

A part of the total number of lines that represent a video image, scanned in
two passes. For example, an NTSC 525-line frame is divided into 262.5-line
fields. See Frame.

Firmware

Software instructions that are permanently stored in the memory of a
computer and are not lost when you turn the power off.

fps

The abbreviation for frames per second, the standard way of measuring the
speed of video playback. Thirty fps is considered real-time playback in
NTSC, 25 fps in PAL. 24 fps is standard for film and is considered animation