The second point there is a technique called windowing. There are several types of windows (Hamming, HaNNing, Square, etc). The purpose of windowing is to create the least amount of discontinuity between samples. This way there's a more natural progression of the frequency spectrum. The different windows basically shape the amplitude of the adjacent frequencies, because since they weren't from the same continuity, they shouldn't "matter" as much.Al Stevens said:Here's what I do not understand:
- If a waveform has a frequency occurring more than once but at different phases, how does the frequency domain represent these data? Or does it need to?
- Many algorithms operate on the time domain buffer and then save some part of the end of the filtered time domain buffer to combine with the next buffer occuring in time. I hope that makes sense as I explained it because I do not fully understand what is going on there.
I've taken signal processing classes, way back in the day (ok ok, so only 4 years ago). My conversing on this topic may be off, and I would welcome anyone to please set me straight. When I get home, I'm pretty tempted to break open that systems/signals book! Whoever thought that this forum would drive me to something like that?