automatically whenever high-
resolution MPEG HD data is
recorded.
Reference video signal
A video signal that contains a sync
signal or sync and burst signals, used
as a reference for synchronization of
video equipment.
SDSDI signal
SD Serial Digital Interface. An
interface standardized as SMPTE-
259M which enables the
transmission of an uncompressed
digital component stream.
S/N
Signal-to-Noise ratio. The relation of
the strength of the desired signal to
the accompanying electronic
interference, the noise. If S/N is high,
sounds are reproduced with less noise
and pictures are reproduced clearly
without snow.
Sub clip
One of the sections which make up a
clip list. A sub clip may be part of a
clip or an entire clip.
Thumbnail image
A reduced still picture of video for
display on a GUI screen. XDCAM
creates thumbnail images from proxy
video, and displays them as index
pictures on GUI screens.
Timecode
A digitally encoded signal which is
recorded with video data to identify
each frame of the video by hour,
minute, second and frame number.
SMPTE timecode is applied to NTSC
system, and EBU timecode to PAL
and SECAM systems.
UMID
Unique Material Identifier. A
standard (SMPTE-330M) for video
and audio metadata. The Basic
section of a UMID contains a
globally unique number and a
material number for the identification
of recorded material. An optional
section called the “Source Pack”
contains information such as the time
and location of recording. A UMID
with the Basic section only is called a
Basic UMID. A UMID with the
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