hw13 - 2 12 , where is the analog-to-digital converters...

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ECE 332 Homework 13 Spring 2010 Due: Tuesday. 05/05/2010 Page 1 of 1 For the following problem’s you must show your work for full credit. 1. What is the relationship between σ , the standard deviation and 2 , the variance? 2. Explain why the error (noise) introduced during the quantization process is uniformly distributed. 3. The analog-to-digital conversion process occurs in three steps; sample, quantize, and encode. Explain which of these three steps introduces noise to the signal. 4. Use the 6 dB/bit rule to explain why listening to an audio recording from a CD player usually sounds much better than the same audio recording listened to over a long distance telephone line. 5. Given that the variance of a uniformly distributed quantization process is equal to
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Unformatted text preview: 2 12 , where is the analog-to-digital converters step size, explain why increasing the number of bits-per-sample results in an increased signal-to-quantization-noise ratio (SQNR). 6. Explain the relationship between the variance of the noise introduced during the quantization process and the noise power introduced during the same quantization process? 7. If using an analog-to-digital converter with a larger number of bits-per-sample, results in less quantization noise, explain why we dont always use a converter with a very large number of bits-per-sample, for example, a 24-bit analog-to-digital converter?...
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This document was uploaded on 11/02/2011 for the course ECE 332 at Boise State.

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