1
GATE ECE 2008
MCQ (Single Correct Answer)
+2
-0.6
A speech signal, band limited to 4 kHz and peak voltage varying between + 5V and - 5V is sampled at the Nyquist rate. Each sample is quantized and represented by 8 bits.

Assuming the signal to be uniformly distributed between its peak values, the signal to noise ratio at the quantizer output is

A
16 dB
B
32 dB
C
48 dB
D
64 dB
2
GATE ECE 2008
MCQ (Single Correct Answer)
+2
-0.6
A speech signal, band limited to 4 kHz and peak voltage varying between + 5V and - 5V is sampled at the Nyquist rate. Each sample is quantized and represented by 8 bits.

If the bits 0 and 1 are transmitted using bipolar pulses, the minimum bandwidth required for distortion free transmission is

A
64 kHz
B
32 kHz
C
8 kHz
D
4 kHz.
3
GATE ECE 2008
MCQ (Single Correct Answer)
+2
-0.6
A speech signal, band limited to 4kHz and peak voltage varying between +5V and -5V is sampled at the Nyquist rate. Each sample is quantized and represented by 8 bits.

The number of quantitization levels required to reduce the quantization noise by a factor of 4 would be

A
1024
B
512
C
256
D
64
4
GATE ECE 2007
MCQ (Single Correct Answer)
+2
-0.6
In delta modulation, the slope overload distortion can be reduced by
A
decreasing the step size
B
decreasing the granular noise
C
decreasing the sampling rate
D
increasing the step size
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