Grass Valley Performer-HD - Manual (Page 55)

Performer-HD Instruction Manual Glossary-1
Glossary
1080i
An abbreviated term for a high definition
digital video signal as defined by SMPTE
274M. 1080i signals have 1920 horizontal
pixels per line, 1080 active lines, and are in-
terlace with two fields per frame.
720p
An abbreviated term for a high definition
digital video signal as defined by SMPTE
296M. 720p signals have 1280 horizontal
pixels per line, 720 active lines, and are pro-
gressive scan.
AC-3
A transport mechanism for multi-channel
audio, as defined by ATSC specification
A-52. AC-3 is used as the audio delivery
system for DTV programs.
Analog
Use of a continuously variable signal to
convey information. Conventional Defini-
tion Television (NTSC, PAL, etc.) is analog.
Aspect
The ratio of a picture’s horizontal and ver-
tical dimensions when correctly displayed
(16:9 for example).
ATSC
Advanced Television Systems Committee,
developer of the HDTV standards recom-
mended to the FCC for adoption.
Auto Ranging
AC input range selections of 90 to 132 VAC
and 180 to 260 VAC are automatic.
Bit Rate
The number of bits per second passed from
one point to another.
Black Burst
See Color Black.
Color Black
An analog synchronizing signal consisting
o f horizontal, vertical, and color synchro-
nizing information. This signal produces a
black screen on a Conventional Definition
television monitor.
Component Video
A video signal that keeps color and lumi-
nance information separate. RGB; Y, R-Y,
B-Y; and Y, Cr, Cb are examples of compo-
nent video.
Composite Video
An encoded video signal that combines
color information with luminance informa-
tion. NTSC, PAL, and D-2 are examples of
composite video.
Conventional Definition Television (CDTV)
The analog NTSC, PAL, SECAM, and relat-
ed television systems.
Delegate
To assign panel controls to a particular op-
erating function. Some panel controls (but-
tons, knobs, joystick) can affect more than
one function. The operator can choose an
alternative function by delegating the pan-
el controls to that function (typically by
pressing or holding down a panel button).