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Exam Questions Papers - Engineering
Q1: 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 quantization levels required to reduce the quantization noise by a factor of 4 would beA
1024
B
512
C
256
D
64
ANS:B - 512 To reduce quantization noise by 4 No. of levels should increase by 2 Thus 512 levels are required. |


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