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http://dx.doi.org/10.7840/kics.2012.37A.12.1122

A Study on the Reconstruction of a Frame Based Speech Signal through Dictionary Learning and Adaptive Compressed Sensing  

Jeong, Seongmoon (경상대학교 전자공학과)
Lim, Dongmin (경상대학교 전자공학과)
Abstract
Compressed sensing has been applied to many fields such as images, speech signals, radars, etc. It has been mainly applied to stationary signals, and reconstruction error could grow as compression ratios are increased by decreasing measurements. To resolve the problem, speech signals are divided into frames and processed in parallel. The frames are made sparse by dictionary learning, and adaptive compressed sensing is applied which designs the compressed sensing reconstruction matrix adaptively by using the difference between the sparse coefficient vector and its reconstruction. Through the proposed method, we could see that fast and accurate reconstruction of non-stationary signals is possible with compressed sensing.
Keywords
adaptive compressed sensing; dictionary learning; frame based speech signal processing;
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