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'''Signal processing''' is an [[electrical engineering]] subfield that focuses on [[analyzing]], [[modifying]] and synthesizing ''[[signal]]s'', such as [[audio signal processing|sound]], [[image processing|images]], [[Scalar potential|potential fields]], [[Seismic tomography|seismic signals]], [[Altimeter|altimetry processing]], and [[scientific measurements]].<ref>{{cite journal|last=Sengupta|first=Nandini|author2=Sahidullah, Md|author3=Saha, Goutam|date=August 2016|title=Lung sound classification using cepstral-based statistical features|journal=Computers in Biology and Medicine|volume=75|issue=1|pages=118–129|doi=10.1016/j.compbiomed.2016.05.013|pmid=27286184}}</ref> Signal processing techniques are used to optimize transmissions, [[Data storage|digital storage efficiency]], correcting distorted signals, [[subjective video quality]], and to also detect or pinpoint components of interest in a measured signal.<ref>{{cite book|title=Discrete-Time Signal Processing|author=Alan V. Oppenheim and Ronald W. Schafer|publisher=Prentice Hall|year=1989|isbn=0-13-216771-9|page=1}}</ref>
==History==
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