What is Signal processing?
'''Signal processing''' is the [[analysis]], [[interpretation]] and [[:wikt:manipulation|manipulation]] of signals. Signals of interest include [[Digital signal processing|sound]], [[image processing|images]], biological signals such as [[ECG]], [[radar]] signals, and many others. Processing of such signals includes [[storage]] and [[reconstruction]], separation of information from [[noise]] (e.g., aircraft identification by radar), [[data compression|compression]] (e.g., [[Image processing|image compression]]), and feature extraction (e.g., converting [[Text to Speech|text to speech]]). == Signal classification == For analog signals, signal processing may involve the [[amplification]] and [[filter]]ing of audio signals for audio equipment or the modulation and demodulation of signals for [[telecommunication]]. For digital signals, signal processing may involve the [[compression]], error checking and error detection of digital signals. * [[Analog signal processing]]—for signals that have not been digitized, as in classical radio, telephone, radar, and television systems * [[Digital signal processing]]—for signals that have been digitized. Processing is done by digital circuits such as [[ASIC]]s, [[FPGA]]s, general-purpose [[microprocessors]] or [[computer]]s, or specialized [[digital signal processor]] chips. * [[Statistical signal processing]]—analyzing and extracting information from signals based on their statistical properties * [[Audio signal processing]]—for electrical signals representing sound, such as music * [[Speech signal processing]]—for processing and interpreting spoken words * [[Image processing]]—in digital cameras, computers, and various imaging systems * [[Video]] signal processing—for interpreting moving pictures * [[Array processing]]—for processing signals from arrays of sensors == Method of Signal processing== Signal processing is the analysis, interpretation and manipulation of acquired signals. Acquired signals must to be processed depending on the purpose of measurement, a metho