Nonlinear signal processing is closely related to nonlinear system identification and can be implemented in the time, frequency, and spatio-temporal domains. DSP applications include audio and speech processing, sonar, radar and other sensor array processing, spectral density estimation, statistical signal processing, digital image processing, data compression, video coding, audio coding, image compression, signal processing for telecommunications, control systems, biomedical engineering, and seismology, among others.ĭSP can involve linear or nonlinear operations. ĭigital signal processing and analog signal processing are subfields of signal processing. In digital electronics, a digital signal is represented as a pulse train, which is typically generated by the switching of a transistor. The digital signals processed in this manner are a sequence of numbers that represent samples of a continuous variable in a domain such as time, space, or frequency.
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