February 2020 Publications Announcements :International Journal of Wireless & Mobile Networks (IJWMN)

Started by Anonymous in comp.dsp2 weeks ago

International Journal of Wireless & Mobile Networks (IJWMN) ISSN:0975-3834 [Online]; 0975-4679 [Print] http://airccse.org/journal/ijwmn.html ...

International Journal of Wireless & Mobile Networks (IJWMN) ISSN:0975-3834 [Online]; 0975-4679 [Print] http://airccse.org/journal/ijwmn.html ********************************************************************* Scope & Topics ============== The International Journal of Wireless & Mobile Networks (IJWMN) is a bi monthly open access peer-reviewed journal that publishes...


Call for Workshop Proposals for the 11th International Conference on Computational Creativity (ICCC'20)

Started by Int. Conference on Computational Creativity in comp.dsp3 weeks ago

------------------------------------------------ =E2=80=A8 The 11th International Conference on Computational Creativity (ICCC'20) June 29...

------------------------------------------------ =E2=80=A8 The 11th International Conference on Computational Creativity (ICCC'20) June 29 =E2=80=93 July 3 2020, Coimbra, Portugal =E2=80=A8 Call for Workshop Proposals =E2=80=A8 Held: during 29th - 30th June at ICCC'20 =E2=80=A8 workshops-iccc20@computationalcreativity.net http://computationalcreativity.net/iccc20/=E2=80=A8 =E2=80=A8 Pl...


mirroring a signal before FFT - why?

Started by Anonymous in comp.dsp4 weeks ago 32 replies

I am trying to make sense of some awful MATLAB code. The first thing it does is mirror the signal. By that I mean it doubles the array length,...

I am trying to make sense of some awful MATLAB code. The first thing it does is mirror the signal. By that I mean it doubles the array length, then puts a time-reversed signal at the newly created back half. So this would have the same amplitude spectum, but what else is going on? Possibly it increases the frequency resolution, as the time length is doubled. I wonder if the algorithm had som...


Holiday Greetings

Started by Richard (Rick) Lyons in comp.dsp1 month ago 17 replies

Here's wishin' all of you guys a very Merry Christmas and a Happy New Year! Of course, these good wishes are also directed at those of you...

Here's wishin' all of you guys a very Merry Christmas and a Happy New Year! Of course, these good wishes are also directed at those of you who do not celebrate Christmas such as: Muslims, Hindus, atheists, Buddhists, software engineers, Sikhs, Jews, filthy IIR filter designers, Shinto, Bolsheviks, Democrats, U.S. senator Mitch McConnell, Neo-Pagans, transsexual lesbians, Government Emp...


Band Stop Filter

Started by Rick C in comp.dsp1 month ago 20 replies

Someone is using this algorithm for high, low and band pass filter coefficients and wants to adapt it for band stop filters. ( y% is an...

Someone is using this algorithm for high, low and band pass filter coefficients and wants to adapt it for band stop filters. ( y% is an integer value that goes from filter length / 2 to +filter length / 2 ) IF y% = 0 THEN c = 1 ELSE IF BandPass THEN th1 = (fh - fl) * pi * y% ' Fhigh and Flow of passband th2 = (fh + fl) * pi * y% c = SIN(th1) * COS(th2) / th1 ...


is there a name for setting weak amplitudes to zero?

Started by Anonymous in comp.dsp1 month ago 7 replies

Clipping is when you set a strong amplitude to some fixed limit. But what about the other end - when it is small, and those tiny amplitudes are...

Clipping is when you set a strong amplitude to some fixed limit. But what about the other end - when it is small, and those tiny amplitudes are replaced by zero?


Jeremiah Y Avins "Jerry"

Started by Anonymous in comp.dsp1 month ago 7 replies

I found out today that Jerry had passed away last April at the age of 85. (= 17 Apr 2018). Jerry was a true polymath and had been quite a...

I found out today that Jerry had passed away last April at the age of 85. (= 17 Apr 2018). Jerry was a true polymath and had been quite a frequent and k= nowledgeable contributor to comp.dsp. Without formal training in the field,= his ability to dig deep and reason out details was simply astounding. Jerr= y will be missed. Clay


U.S. Television Polarization

Started by Randy Yates in comp.dsp2 months ago 15 replies

Hey Folks, I did some googling on this and couldn't get a satisfying answer. 1. What polarization is used to transmit? 2. What...

Hey Folks, I did some googling on this and couldn't get a satisfying answer. 1. What polarization is used to transmit? 2. What polarization is used to receive? The answer to question 2 would seem to be horizontal since that is the orientation of the antennas I've seen. But most broadcast TV antennas are (I believe) vertical. If I've got it right, then why do the tx/rx polarizati...


non-recursive fft

Started by MatthewA in comp.dsp2 months ago 13 replies

Is there any info on how to implement fft and ifft algorithms that aren't recursive? I'd like to possibly calculate a really long on inside a...

Is there any info on how to implement fft and ifft algorithms that aren't recursive? I'd like to possibly calculate a really long on inside a signal chain so attempting to compute a 2 second fft in one function call would probably be disastrous. -Matt


Watermark/fingerprint image for detecing transforms

Started by Gert in comp.dsp2 months ago 1 reply

Hi DSP people, I have a black-box system that ingests digital images, can perform a number of transformations on it, and later spits some of...

Hi DSP people, I have a black-box system that ingests digital images, can perform a number of transformations on it, and later spits some of them out in random order. My goal is to create an algorithm to generate digital images I sent into the system so that I can identify them when/if they come out, and tell which kind of transformations they have undergone. The images I put in have a n...


Ask a Question to the DSPRelated community

To significantly increase your chances of receiving answers, please make sure to:

  1. Use a meaningful title
  2. Express your question clearly and well
  3. Do not use this forum to promote your product, service or business
  4. Write in clear, grammatical, correctly-spelled language
  5. Do not post content that violates a copyright