Date Available
12-7-2011
Year of Publication
2006
Document Type
Thesis
College
Engineering
Department
Electrical Engineering
First Advisor
William Dieter
Abstract
In modern digital audio applications, a continuous audio signal stream is sampled at a fixed sampling rate, which is always greater than twice the highest frequency of the input signal, to prevent aliasing. A more energy efficient approach is to dynamically change the sampling rate based on the input signal. In the dynamic sampling rate technique, fewer samples are processed when there is little frequency content in the samples. The perceived quality of the signal is unchanged in this technique. Processing fewer samples involves less computation work; therefore processor speed and voltage can be reduced. This reduction in processor speed and voltage has been shown to reduce power consumption by up to 40% less than if the audio stream had been run at a fixed sampling rate.
Recommended Citation
Datta, Srabosti, "POWER REDUCTION BY DYNAMICALLY VARYING SAMPLING RATE" (2006). University of Kentucky Master's Theses. 275.
https://uknowledge.uky.edu/gradschool_theses/275
