Video History/
Analog Video Signal/ CRTs
Analog Video Signal/ CRTs
How many fields are in one frame of analog video?
2 fields
Which two factors influence the fidelity of an analog to digital conversion?
(must have both answers)
Sampling
&
Quantization
What are the two main classification of data?
(must have both answers)
Symbolic
&
Numerical
Which antenna radiates power uniformly in all directions?
Isotropic antenna
A fully modulated wave is said to be _____.
100% modulated
What is the standard signal level of composite analog video?
1 Vpp
or
140 IRE
How many levels are created when using 10 bit quantization?
1024
What is the smallest block size called in the JPEG standard?
Data Unit (DU)
Which antenna radiates power uniformly in two axis?
Omni-directional
The extent of frequency changes in one direction from the carrier is called what?
Frequency Deviation
Color TV relies on what three light properties?
(must have all three answers)
Brightness
Hue
Saturation
What bit words are reserved for Timing Reference Signals (hexadecimal)?
000-003
&
3FC-3FF
What must each Group of Pictures (GOP) start with?
I frame
Who regulates interstate (between states) and international communications by radio, television, wire, satellite and cable in all of the 50 states, the District of Columbia and U.S. territories for non-federal agencies?
Federal Communications Commission (FCC)
Which signal actually forces the modulation?
(the intelligence or the carrier)
The intelligence
What is the illuminated area of the picture tube where a picture can be displayed?
Raster
What are the two sampling structures used in Standard Definition and their sampling rate?
(must have both answers)
Composite – 4fsc
Component - 4:2:2
True or False:
The wrapper specifies what codec the container format uses.
False
Who handles all spectrum analysis and frequency allocations for federal entities to include FBI, CIA, and DoD?
National Telecommunications and Information Agency (NTIA)
How much separation should there be between the visual and audio carriers?
4.5 MHz
What are the three primary colors and their percentages?
(must have all three with correct percentages)
Green - 59%
Red - 30%
Blue - 11%
What type of backlight do LCDs use?
Cold Cathode Fluorescent Lamp (CCFL)
What codec is the ATSC standard for digital television?
MPEG-2
What are the frequency allocations for both AM and FM?
(must have both answers)
AM: 535kHz - 1705kHz
FM: 88MHz - 108MHz
Give two ways to deliver baseband audio and video signals from the studio to the transmitter.
Microwave
Wideband cable
Landlines (leased from the telephone company)
Fiber-optic cable