In Reply to: RE: Question about "upsampling" posted by Tony Lauck on February 11, 2009 at 11:57:03:
I've seen conflicting information on what the filter requirements are when doing sample rate conversion to a higher rate. Some say that you need to apply the anti-alias filter for the original Nyquist frequency, while I think the more correct answer is that the slope of the filter can now be reduced since the stop band is wider, stretching to the new sample rate Nyquist frequency. Is this the correct answer? If so, that seems like a big advantage, especially if you skip any additional "standard" digital filtering.
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Follow Ups
- No brickwall filter then? - Slider 12:11:50 02/12/09 (4)
- No Free Lunch! - Charles Hansen 20:30:32 02/12/09 (0)
- RE: No brickwall filter then? - Tony Lauck 13:52:34 02/12/09 (2)
- So, is that a yes? - Slider 23:56:53 02/12/09 (1)
- One of the few posts by Ted that is wrong. - Charles Hansen 10:42:34 02/13/09 (0)