Glossary
© 2012 Harmonic Inc.
217
ProView 7000 v.2.6, Rev. E
unbalanced audio
Audio that has a single output with respect to ground; that is, the output is not transmitted
differentially.
.
Uploading configuration
Sending the configuration to the device.
V
VANC
Vertical Ancillary data space. During the vertical interval of each field or frame, the ancillary data space
located between SAV and EAV markers. Digital information can be transmitted efficiently in VANC (as
opposed to VBI), since only the direct bits are sent. There are SMPTE standards documenting the
carriage of most services originally carried in VBI.
VBI
Vertical Blanking Interval. This is the space between the end of the vertical synchronization pulses and
start of the active video (lines 10 to 21 for
, and lines 6 to 22 for
). Digital information can be
transmitted during this time when encoded as waveforms. Examples of signals transmitted in the VBI
include teletext, AMOL, and CEA-608 closed captions.
VI
Video Index
W
WSS
Wide Screen Signaling. WSS is an analog waveform carried in Line 23 of a 625-line (PAL) video signal. As
a type of
signaling, it conveys the aspect ratio of the image, and can be used by WSS-capable
televisions to determine the correct display mode. For example, standard (4:3), widescreen (16:9), or
<letterbox> (16:9 on 4:3). Strictly speaking. It is being obsoleted by AFD over time.
Y
Y (luminance)
Brightness component of a video signal.
YUV
YUV component signals used by analog composite systems. The Y is the luma component, U and V are
color difference components scaled for proper encoding into the composite signal. All three
components are derived from RGB.
