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*drinks coffee*

cry my friends.

My phone broked

Cheer me up with anything

getting away with murder~!

longcat

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I have implemented an improvement to the laryngograph onset detection procedure.

In typical laryngograph signals, like most signals, there is high-frequency noise. However, in addition to this high-frequency noise, there is also an abundance of low-frequency noise, usually much more than the high-frequency noise. This is due shifting of the neck and laryngograph. The standard DSP solution to this problem would be to use a highpass filter. However, the frequency of this noise, and thus the required transition band, are so low that it would render a standard single-stage FIR highpass filter impractical.

The complete procedure I have implemented is follows:
1. The signal is lowpass-filtered (to filter out the high-frequency noise).
2. Peaks (which correspond to glottal closure instants) are detected and interpolated using quadratic interpolation. The topographical prominence is also calculated for each peak, and peaks below a minimum prominence are discarded.
3. In between each adjacent pair of peaks, the minimum valley is found (also using quadratic interpolation).
4. An envelope is created using the natural cubic spline algorithm from this set of minimum valleys.
5. This envelope is subtracted from the original signal.
6. The signal is filtered again, replacing the old filtered signal.
7. Peaks are detected again, replacing the old set of peaks.
8. These peaks are grouped into regions using two heuristics: distance between subsequent peaks and change in subsequent distances.
9. Regions with only one peak are discarded.

Another approach would be to use two-stage downsampling. Then, it could be further lowpass-filtered to obtain fine-control (the new sample rate is chosen to be efficient, not necessarily precisely what is desired). These values could then be used in the same interpolation procedure; alternatively, they can be upsampled back to the original sampling rate (also using a two-stage process for efficiency reasons) and this signal subtracted from the laryngograph signal.

This approach is more correct in theory. On the other hand, this assumes a perfectly periodic signal. In reality, the laryngograph pulses vary. Furthermore, they are most definitely not period around the start and end of voiced regions. This aperiodicity will distort any filtering operation. On the other hand, the valleys in between pulse generally vary much less than the signal overall. Two stage downsampling is also less efficient than the spline approach.

Comment too long, view post No.196560 to see the full comment.

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this is the best metaphor for PENIS ive ever seen

reply under so I can fucking ban you!

Hi guys!
I liked Happy Sugar Life subject but I didn't anime.
Especially the final very rushed.

What do you think I should read the manga?
Or do you have other series like this?

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you better not coming to school tomorrow.

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mods i went on tiktok today can i show heyuri what i saw there?

3 hours until the cytube stream, don't miss it! ヽ(´ー｀)ノ
>>>/a/7326

We will watch Sola (2007) on the next Saturday (10th), starting 18:00 UTC

Join from here when the time comes: https://watch.heyuri.lol/r/stream

We had a poll on whether we should hold an anime stream this month or not, there were some opinions that 2 streams in a month would be excessive but the result was 60% positive - so we will hold this anime stream, which would be 21 days before the Halloween stream.
It's about a guy who likes taking picz of the sky (sola=read as sora=JP for "sky") and a girl that only comes out at night. It's said to have a ronery atmosphere, but that's around all we need to know about it

For newcomers, you can find the detailed information and our previous streams from here: https://wiki.heyuri.net/index.php?title=Heyuri_Cytube
Heyuri's rules apply in the CyTube channel.

Also please fill our nominations page where we pick these shows from: https://cgi.heyuri.net/nominate/ - you must log in at least once every 4~ months to keep your votes intact!