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Wireless Mobile Communications
Wireless Mobile Communications Multiple Choice
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Q.1
Frequency domain coders divides the speech signal into __________
a) A set of frequency components
b) A set of different amplitudes
c) A set of time delays
d) A set of phase components
Q.2
In frequency domain coding of speech, the number of bits used to encode each frequency component is constant.
a) True
b) False
Q.3
Quantization is a ________ process.
a) Linear
b) Direct
c) Non-linear
d) Indirect
Q.4
Sub band coding codes the short time transform of a windowed signal.
a) True
b) False
Q.5
Which of the following is one of the most frequently used transform in speech coding?
a) Fourier transform
b) Wavelet transform
c) Shearlet transform
d) Discrete cosine transform
Q.6
What does ATC stands for in speech coders?
a) Automatic transform code
b) Air traffic controller
c) Active thermal convection
d) Adaptive transform coding
Q.7
Waveform coders and Vocoders are the types of ____________
a) Speech coders
b) Modulation technique
c) Frequency translation methods
d) Channel allocation for transmission
Q.8
The type of frequency domain coding that divides the speech signal into sub bands is _____
a) Waveform coding
b) Vocoders
c) Block transform coding
d) Sub-band coding
Q.9
Speech coders are categorized on the basis of __________
a) Signal compression techniques
b) Frequency of signal
c) Bandwidth of the signal
d) Phase of the signal
Q.10
The speech coding technique that is dependent on the prior knowledge of the signal is __________
a) Waveform coders
b) Vocoders
c) Sub band coding
d) Block transform
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