Question

explain multi rate digital signal processing​

Answer 1

Multi rate DSP : Multi rate simply means "multiple sampling rates". A multi rate DSP system uses multiple sampling rates within the system. Whenever a signal at one rate has to be used by a system that expects a different rate, the rate has to be increased or decreased, and some processing is required to do so.

Answer 2

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In multirate digital signal processing the sampling rate of a signal is changed in or- der to increase the efficiency of various signal processing operations. This technique is used in audio CD, where the sampling frequency 44.1 kHz is increased fourfold to 176.4 kHz before D/A conversion.

Digital Signal Processing is important because it significantly increases the overall value of hearing protection. Unlike passive protection, DSP suppresses noise without blocking the speech signal. ... Real world signals are converted into a domain where abstract scientific and mathematical models are then applied.