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Audio Signal Processing: Analog Devices
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For analog signals, signal processing may involve the amplification and filtering of audio signals for audio equipment or the modulation and demodulation of signals for telecommunications. For digital signals, signal processing may involve the compression, error checking and error detection of digital signals.
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Speech signals are commonly found surrounded or superimposed with other types of audio signals in many application areas. The former are often mixed with musical signals or background noise. Moreover, audio signals frequently exhibit a composite nature, in the sense that they were originally obtained by combining several audio tracks with an audio mixing device. Audio signals are ... prone to suffer from all kinds of degradations –ranging from non-ideal recording conditions to transmission errors– after having travelled through a complete signal processing chain.
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Analog Devices