Which of the following most accurately defines white balance?
A. The amount of white pixels that appear in a video frame
B. A feature that eliminates noises distributed uniformly over the frequency spectrum
C. A feature that splits the signal between the red, green, and blue components to make white
D. A feature that adjusts the signal between the red, green, and blue components that yield white video signals.
H.323 Visual Telephony related ITU-T Standards defines the Media Gateways as:
A. Packet to Channel Media Conversion.
B. Packet to ATM Broadband Conversion.
C. Packet to VSAT Satelite Communications.
D. All of the above
E. None of the above
Switched Channel Circuit Network by definition is network that provides:
A. Packet switching.
B. Cell Switching.
C. temporary half-duplex connection from point A to point B.
D. temporary full-duplex connection from point A to point B.
E. permanent half-duplex network connections from point A to point B.
F. permanent full-network connections from point A to point B.
G.722 uses which bit rate speeds for H.320 Visual Telephony?
A. 64, 32, and 56 kilobits per second
B. 64, 56, and 48 kilobits per second
C. 64, 56, and 48 kilobytes per second
D. 24 and 56 kilobits per second
E. 48 and 56 kilobits per second
F. 48 and 56 kilobytes per second
G. 16 and 32 kilobits per second
Which of the following apply to a Video Conferencing System? (Select three of the following options.)
A. Coder / Decoder
B. Audio Translator
C. Audio, Video, Content, and Data Translator
D. Analog to Digital and Digital to Analog Converter
E. Video, Audio, Content, and Data Multiplexer
The Bandwidth on Demand Interoperability Group created four modes for standardized Inverse Multiplexing. Which mode is best compatible with H.320/221 Video Conferencing?
A. Mode 1
B. Mode 2
C. Mode 3
D. Mode 4
Gatekeeper messages for registration and admission that are successful will always have the Generic
structure as:
(Note - "XX" - is a variable value that represents specific Gatekeeper names)
A. RequestXX, ReplyXX
B. RequestXX, DenyXXC
C. XXRequest, XXReply
D. XXRequest, XXConfirm
E. XXRequest, XXAcnowledged
A mic-level audio signal will measure as:
A. 10 kiloVolt.
B. 10 miliVolt.
C. 10 gigaVolt.
D. 10 Watt.
E. 10 Amp.
What are the termination impedance and the signal level for PAL video?
A. 50 Ohms and 1 Vpp
B. 50 Ohms and 2 Vrms
C. 75 Ohms and 1 Vpp
D. 75 Ohms and 1 Vrms
Which of the following audio coding provides a frequency response bandwidth range of 50- 7000Hertz?
A. G.711 and G.721
B. G.723.1 and G.729
C. G.721 and G.725
D. G.726 and G.729
E. G.722 and G.722.1
