Steinberg Nuendo Time Base, Operation Manual, Page: 89 / 92

TIME BASE
Glossary 9 – 89
Digital Audio An analog audio signal, which has been converted in a binary data
stream (via an A/D-Converter) for transfer and storage in a digital
medium.
Drop Frame DF is one of two SMPTE Time Code formats. It is used in connection
with the NTSC color TV standard. To make the Time Code compati-
ble to the video, 108 frames are dropped during each hour of play-
back.
Drop out A gap or interruption in an audio signal, e.g. incoming Time Code
usually caused by flaws in magnetic tape coating resulting in loss of
magnetic particles from the tape or any other recording medium.
EBU European Broadcast Union – EBU Time Code runs at 25 Frames per
Second (25 fps).
EXT VID External Video Sync signal (house sync) that Time Base can use as
its Timing Reference. Can be found as Composite Sync, Blackburst
or Composite Video.
Frame Individual frame of Film, or full TV frame made up of two half frames, a
complete Time Code word.
Frame rate Number of (full-) frames, which pass in a second of audio, film or
video (frames per second - fps). Film and various video systems
have different Frame Rates, for example:
30
30 fps US Monochrome TV
NTSC 29.97 fps US Color Video, TV
PAL 25 fps European TV,
B/W and Color
Film 24 fps Cinematic Film
Frequency The number of wave cycles that occur in one second.
The unit of measurement is Hertz (Hz).
Generate Running the system Time Code Generator, so that Time Code is
available at the LTC connector.
Generator Time Code Generator. This generator receives its speed reference
from an internal or external source.
HDR Hard Disk Recorder – Computer based recording system.
HH:MM:SS:FF Hours:Minutes:Seconds:Frames. A Time Code address (value).
Hold The ability of Time Base to continue generating Word Clock at the
same frequency as the incoming Word Clock if this is interrupted.
House sync Central Clock for all devices within a studio compound (House Sync).
Initialize Clears the Time Base RAM completely. Occurs only as a result of a
technical fault (i.e. battery empty).