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Comb Filter

In signal processing, a comb filter adds a delayed version of a signal to itself, causing constructive and destructive interference. Comb filtering is a digital process designed for the separation of Y and C from a composite video signal, based on 'combing' out the chrominance signal from the luminance. The frequency response of a comb filter consists of a series of regularly-spaced spikes, giving the appearance of a comb.

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