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Dictionary of Technical Terms - Num
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Numerals
110 Analog Video Switcher
A compact, low-cost analog video switcher made by
Grass Valley. Widely recognized as the industry standard for small
switchers.
1000/1200 Digital Video Switchers
Compact yet full-featured component digital video
switchers made by Grass Valley.
20-TEN™
Grass Valley one rack-unit routing switcher with 20
inputs and 10 outputs.
200/250 Series Switchers
A series of multiple M/E production and post
production analog and analog component video switchers made by
Grass Valley. The standard by which other analog switchers are
measured.
3.58MHz
The approximate frequency of the subcarrier used in
NTSC video to carry the color information. The actual frequency is
3.579545 MHz \xb1 10 Hz.
3000 Digital Video Switcher
A powerful, multiple M/E composite digital video
switcher made by GVG.
3800 Impedance Conversion Modules
A series of GVG video balun modules for converting
between balanced and unbalanced 75 ohm or 124 ohm video cable.
4.43 MHz
The approximate frequency of the subcarrier used in
PAL video to carry the color information. The actual frequency is
4.43361875 MHz +/- 5 Hz.
409
Grass Valley Group editor program that automatically
cleans the edit decision list to eliminate overlapping edits.
4000 Component Digital Switcher
A top-of-the-line multiple M/E component digital
video switcher made by GVG.
4-field sequence
See color field.
4fsc
Four times the frequency of SC (subcarrier). The
sampling rate of a D2 digital video signal with respect to the
subcarrier frequency of an NTSC or PAL analog video signal. The
4fsc frequency is 14.3 MHz in NTSC and 17.7 MHz in PAL.
4:2:2
A commonly-used term for a component digital video
format. The details of the format are specified in the ITU-R
BT.601-2 standard document. The numerals 4:2:2 denote the ratio of
the sampling frequencies of the single luminance channel to the two
color difference channels. For every four luminance samples, there
are two samples of each color difference channel. See ITU-R
BT.601-2.
4:2:2:4
Same as 4:2:2 but with the addition of a key channel
which is sampled four times for every four samples of the luminance
channel.
4:4:4
Similar to 4:2:2 except that for every four
luminance samples, the color channels are also sampled four
times.
4:4:4:4
Similar to 4:2:2:4 except that for every four
luminance samples, the color and key channels are also sampled four
times.
7000 Signal Management System
A sophisticated serial digital video and AES/EBU
digital audio routing switcher made by Grass Valley. Capable of
controlling component and composite analog video/audio and serial
component and composite digital video/audio within the same frame.
Offers frame sizes from 16 x 16 to 128 x 128 with expansion up to
1024 x 1024.
SMS 8000 Systemization Products
A series of compact digital-to-analog and
analog-to-digital video converters made by Grass Valley.
8-field sequence
See color field.
8281
A commonly-used type of precision, double-shielded,
75-ohm video cable manufactured by Belden Wire & Cable
Company.
8500/8800 Distribution Amplifiers
Modular video distribution products made by Grass
Valley.
90W Wideband IM Fiber Optic System
A cost-effective fiber distribution system for wide
bandwidth (HDTV) video.
MAX 900 Analog Systemization Products
A series of modular component analog video
distribution, translation, source selection, and timing/delay
products made by Grass Valley.
MAX 9000 Digital Systemization Products
A series of modular digital video and AES/EBU audio
products made by Grass Valley. Available modules include
serializers, deserializers, line delays, multiplexers,
demultiplexers, distribution amplifiers, and D/A and A/D
converters.
9500 Series Sync Generators
A series of synchronizing generators made by Grass
Valley.
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