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Chapter 12 : Noise in Pulse Code Modulation and Delta Modulation Systems





1Does probability distribution of quantization noise depend on time?
A)Yes
B)No


2The thermal noise is white, Gaussian. Is it true?
A)Yes
B)No


3In principle, the transmitter of a DM system can simply be a bistable multivibrator. Is that correct?
A)Yes
B)No


4Is it experimentally observed that quantization noise in DM is white in the frequency range of interest?
A)Yes
B)No


5In DM, signal to quantization noise ratio increases eight fold if bit rate is doubled. Explain if true.
A)Yes. Substituting in Eq. 12.39 as done in Example 1
B)No


6Is it true that in DM the thermal noise depends on low frequency cut-off of the message signal and not high frequency cut-off?
A)Yes
B)No


7Is it true that for companded PCM the output SNR is comparable to DM?
A)Yes
B)No


8Understable speech is produced in some ADM upto error probability 0.1 while this is 0.01 and 0.0001 for DM and PCM respectively. Is the statement correct?
A)Yes
B)No


9Can thermal noise cause more serious problem in ADM compared to DM?
A)Yes
B)No





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