Question

Which of the following methods are used in sampling rate conversion of a digital signal?

(a) D/A convertor and A/D convertor

(b) Performing entirely in digital domain

(c) None of the mentioned

(d) D/A convertor, A/D convertor & Performing entirely in digital domain

The question was asked in an interview for internship.

My question comes from Multirate Digital Signal Processing in portion Multirate Digital Signal Procesing of Digital Signal Processing

Answer 1

Right option is (d) D/A convertor, A/D convertor & Performing entirely in digital domain

The best explanation: Sampling rate conversion of a digital signal can be accomplished in one of the two general methods. One method is to pass the signal through D/A converter, filter it if necessary, and then to resample the resulting analog signal at the desired rate. The second method is to perform the sampling rate conversion entirely in the digital domain.