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Wrong, zero stuffing and filtering do exactly the right thing

Howdy

You need to read and understand a basic digital signal processing book or take a class in the subject.

The interpolation you talk about is the digital filter I'm talking about.

The process of zero stuffing followed by (digital) filtering at 1/2 the input clock freq is exactly the correct way to raise sample rates by an integer.

The process of filtering at 1/2 the output clock rate and throwing out all but every Nth sample is exactly the correct way to lower sample rates by an integer N.

The process of zero stuffing followed by (digital) filtering at 1/2 the lowest of the input and output clock freqs and then throwing out all but every Nth sample is exactly the correct way to synchronously sample rate convert by an integer ratio.

If this isn't clear I'm sorry but I'm dumbfounded in that I don't know where to start to make it any clearer.

-Ted


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