COVID and statistics

Started by Steve Pope in comp.dsp2 years ago 1 reply

I hope everyone is well. This one is long and possibly boring. Since now we are apparently all epidimologists I thought I'd give it a try...

I hope everyone is well. This one is long and possibly boring. Since now we are apparently all epidimologists I thought I'd give it a try along with everyone else. And I have three technical questions in the below. USA total, and USA by state statistics are available at the COVID Tracking Project among other places. I've seen a lot of actors draw conclusions from such data using pure...


seeking scipy examples of swept-coefficient (time varying) filters

Started by Robert Poor in comp.dsp2 years ago 5 replies

I've been pleased with ease of use of the scipy.signal package for implementing bandpass filters: the `signal.butterworth()`,...

I've been pleased with ease of use of the scipy.signal package for implementing bandpass filters: the `signal.butterworth()`, `signal.sosfilt_zi()` and `signal.sosfilt()` functions do just what I expect for a filter with constant center frequency and bandwidth. But now I'd like to make the frequency and bandwidth settings be time varying functions themselves, and I'm not sure how to


looking for early TI DSP evaluation kits

Started by Al Kossow in comp.dsp2 years ago

I'd like to find examples of early TI DSP evaluation kits like the TMDS3200026 for the Computer History Museum collection. Anyone have any...

I'd like to find examples of early TI DSP evaluation kits like the TMDS3200026 for the Computer History Museum collection. Anyone have any kicking around?


Dolph-Chebyshev Window (octave+maxima)

Started by Johann Klammer in comp.dsp2 years ago 10 replies

I have followed rick lyons article on this ,and using the example values he gives, the output matches. But using different parameters the...

I have followed rick lyons article on this ,and using the example values he gives, the output matches. But using different parameters the filter kenel ends up strangely wiggly. I must be doing something wrong. Here is what i've tried: in maxima: > N:32; > gamma:48/20; > M:N+1; > alpha:cosh(acosh(10^gamma)/N); > A(m):=abs(alpha*cos(%pi


Call for Tutorials @ The 11th International Conference on Computational Creativity (ICCC'20)

Started by Anonymous in comp.dsp2 years ago

(Apologies for cross-posting) Call for Tutorials @ The 11th International Conference on Computational Creativity (ICCC'20) June 29 – July...

(Apologies for cross-posting) Call for Tutorials @ The 11th International Conference on Computational Creativity (ICCC'20) June 29 – July 3 2020, Coimbra, Portugal 
 Tutorials held during 29th - 30th June The 11th International Conference on Computational Creativity (ICCC) is looking for tutorial proposals to be held along with the main conference in the historic


[Complete Moonshot] Afterburner MSD models?

Started by MatthewA in comp.dsp2 years ago

MOONSHOT: Look, I'm not saying I know anything about FPGAs or physics engines but... Anyone in NY wanna pool some dough and try and run a...

MOONSHOT: Look, I'm not saying I know anything about FPGAs or physics engines but... Anyone in NY wanna pool some dough and try and run a physics engine at 44.1kHz through that new afterburner card? I've started projects with less knowledge. Famouse last words: How hard could it be? https://ieeexplore.ieee.org/document/8892162


Why don't we just zero out FFT bins?

Started by bmh161 in comp.dsp2 years ago 32 replies
FFT

This is probably a stupid question but, well, I'm not all that smart... Instead of going through all the trouble of designing complicated...

This is probably a stupid question but, well, I'm not all that smart... Instead of going through all the trouble of designing complicated digital filters, why don't we just pick the frequencies that we want to supress and replace those bins in the FFT with zeros?


magical Black Hole image

Started by Steve Pope in comp.dsp2 years ago 6 replies

The Event Horizon Telescope team of course deserves a huge amount of credit for their results. But it's interesting how they got there. ...

The Event Horizon Telescope team of course deserves a huge amount of credit for their results. But it's interesting how they got there. Here's an article with some non-technical discussion: https://fivethirtyeight.com/features/forget-the-black-hole-picture-check-out-the-sweet-technolog y-that-made-it-possible/ Their data is too noisy to actually create a black hole image. So they a


history of coding

Started by RichD in comp.dsp2 years ago 10 replies

Recently I attended a coding seminar. The speaker very briefly reviewed the relevant history; first Hamming codes, ~1960: BCH codes, ~1970:...

Recently I attended a coding seminar. The speaker very briefly reviewed the relevant history; first Hamming codes, ~1960: BCH codes, ~1970: convolutional, 1995: polar, 2002: LDPC Clue me in - what was the advance in each case? I worked on a BCH project once, that seemed fairly efficient, how is it, or other algorithms, deficient? -- Rich


Naive question(s) about DTV

Started by Richard Owlett in comp.dsp2 years ago 16 replies

In the 60's I spent time as a BSEE student. Took a course using _Signals, Systems and Communication_ , Lathi , 1965 A generation later I found...

In the 60's I spent time as a BSEE student. Took a course using _Signals, Systems and Communication_ , Lathi , 1965 A generation later I found comp.dsp and obtained a copy of _Understanding Digital Signal Processing_ , Lyons, 2004 May I answers suitable for a bright high school student who reads eclectically {will account for what I've forgotten &/or never knew ;}. I've a germ of an ide...


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