In Reply to: They're One and the Same!!!! posted by Todd Krieger on February 24, 2007 at 19:10:58:
HowdyYou 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
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Wrong, zero stuffing and filtering do exactly the right thing - Ted Smith 02:22:38 02/25/07 (9)
- The Problem is Context and Confusion..... - Todd Krieger 11:58:45 02/25/07 (8)
- Re: The Problem is Context and Confusion..... - Ted Smith 14:04:16 02/25/07 (0)
- And Most-Importantly..... - Todd Krieger 12:11:30 02/25/07 (6)
- Re: And Most-Importantly..... - Ted Smith 13:55:47 02/25/07 (5)
- I can see why he drove real_jj mad :-) (nt) - Christine Tham 13:59:36 02/25/07 (4)
- Yep :-) - Ted Smith 14:07:26 02/25/07 (3)
- Including me, I presume? (nt) - Christine Tham 14:26:24 02/25/07 (2)
- Hmmm, I don't remember :) [nt] - Ted Smith 14:29:43 02/25/07 (1)
- Very diplomatic :-) - Christine Tham 14:35:01 02/25/07 (0)