This set of Video Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Signal Processing in Plasma TV Receivers”.
1. Before the audio signals are fed as an input to the audio processor, the signals need to be sampled in plasma TV receivers.
a) True
b) False
View Answer
Explanation: The above statement is true. In audio signal processing, the signal needs to be sampled before the audio signals are fed as an input to the audio processor. Sampling is the process of converting a continuous time signal to a discrete time signal. Sampling sets up a single stream signal.
2. Which channel is used to control the picture quality in plasma TV receiver?
a) Tuner
b) Chrominance
c) Luminance
d) Demodulation
View Answer
Explanation: The video processor separates the video signals into two distinguished channels namely luminance and chrominance. The luminance channel is used to control the picture quality. The parameters include brightness and sharpness. The second channel chrominance controls the colorimetric difference between given colors in a television picture.
3. Which of the following is the chief micro-computer in plasma TV receivers?
a) AGC (Automatic Gain Control)
b) CCU (Central Control Unit)
c) IF section
d) UI (User Interface)
View Answer
Explanation: CCU (Central Control Unit) is the chief micro-computer. It receives the commands of the user as per his requirements and controls all other micro-computers in the system based on the conveyed commands. The program for the User Interface is contained in the ROM of the CCU.
4. Which of the following is the digital subsystem in plasma TV receivers?
a) Tuner
b) Demodulation
c) SYNC signals
d) RF input
View Answer
Explanation: A tuner is a digital subsystem. It receives the Radio Frequency (RF) from the receiver and converts the selected carrier frequency and its associated bandwidth into a fixed and lower frequency that is suitable for further processing. The frequency is selected by the user with the help of a controlling device (e.g. Remote Control).
Sanfoundry Global Education & Learning Series – Video Engineering.
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