Signal processing is the process of analyzing, manipulating and transforming signals to obtain specific information or perform a desired function. There are several synonyms used for signal processing that give a better description of the field. These synonyms include digital signal processing which involves processing signals using mathematical algorithms, communication signal processing which focuses on processing signals in telecommunications, image processing which deals with processing digital images, audio signal processing which focuses on audio signals, and speech signal processing which deals with processing speech signals. Regardless of the synonym used, signal processing plays a crucial role in various applications, from processing images to analyzing sounds, to processing data.