Editing Electrical engineering (section)

===Signal processing===
{{Main|Signal processing}}
[[File:Bayer pattern on sensor.svg|thumb|left|A [[Bayer filter]] on a [[Charge-coupled device|CCD]] requires signal processing to get a red, green, and blue value at each pixel.]]
[[Signal processing]] deals with the analysis and manipulation of [[signal]]s.{{Sfn|Tuzlukov|2010|p=20}} Signals can be either [[analog signal|analog]], in which case the signal varies continuously according to the information, or [[Digital signal (signal processing)|digital]], in which case the signal varies according to a series of discrete values representing the information. For analog signals, signal processing may involve the [[amplifier|amplification]] and [[Filter (signal processing)|filtering]] of audio signals for audio equipment or the [[modulation]] and [[demodulation]] of signals for telecommunications. For digital signals, signal processing may involve the [[Data compression|compression]], [[error detection]] and [[error correction]] of digitally sampled signals.{{Sfn|Manolakis|Ingle|2011|p=17}}

Signal processing is a very mathematically oriented and intensive area forming the core of [[digital signal processing]] and it is rapidly expanding with new applications in every field of electrical engineering such as communications, control, radar, [[audio engineer]]ing, [[broadcast engineering]], power electronics, and [[biomedical engineering]] as many already existing analog systems are replaced with their digital counterparts. [[Analog signal processing]] is still important in the design of many [[control system]]s.

DSP processor ICs are found in many types of modern electronic devices, such as digital [[television set]]s,{{sfn|Bayoumi|Swartzlander|1994|p=25}} radios, [[hi-fi]] audio equipment, mobile phones, [[Portable Media Player|multimedia player]]s, camcorders and digital cameras, automobile control systems, [[noise cancelling]] headphones, digital [[spectrum analyzer]]s, missile guidance systems, [[radar]] systems, and [[telematics]] systems. In such products, DSP may be responsible for [[noise reduction]], [[speech recognition]] or [[Speech synthesis|synthesis]], [[Codec|encoding or decoding]] digital media, wirelessly [[Transceiver|transmitting or receiving]] data, triangulating positions using [[GPS]], and other kinds of [[image processing]], [[video processing]], [[audio signal processing|audio processing]], and [[speech processing]].{{Sfn|Khanna|2009|p=297}}