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Results tagged with signal-analysis
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user 5762
The processing of signals for the purpose of extracting a parameter or property embedded in a signal. Signal goes in and far fewer numbers come out.
5
votes
3
answers
2k
views
how were DTMF frequencies determined exactly and how can I extend them?
I've been playing with DTMF frequencies and the Goertzel algorithm, and would like to know exactly HOW the DTMF frequencies were determined. I understand that they were chosen such that none of the fr …
- 187
1
vote
1
answer
1k
views
relationship between block size and detected frequencies in goertzel algorithm
I'm trying to use the goertzel algorithm to detect a pair of frequencies in a signal.
The sample rate I'm using is 8000 hz, and the size of the incoming sample buffer is 60 samples.
I have a large …
- 187
0
votes
1
answer
495
views
Change of bin magnitude when phase of signal changes when doing FFT?
I am working on an implementation in which I need to apply an FFT to determine which of 4 frequencies are present in a signal.
I am doing a 64 point FFT on a buffer which only is partly filled (the …
- 187