Recent content by raminee

Thank you "Berkeman" ! I already did some research and the two methods that I came across is a cover for the USB and also putting a diode between the power lines on the USB lines. But I was wondering if there are other techniques that they use. We do have BTLE but adding a wireless charger and...

I am actually trying to build a wearable product for kids which has a USB connection for charging as well as data connectivity just like many wearable/mobile devices. We envision that kids are not careful enough and may accidentally get the device wet through rain, just like your own experience...

Hello All, I would like to know how mobile devices or EE devices that use mini/micro USB ports are protected from any water contacts ? i.e. how can you protect against any electrical shorting/damages when such devices are immersed in water ? R.

OK I think I found the answer. For those of you that are interested here are the 2 correct terminologies for this: Lexicographical Elements of Combinations and Combinadic. The links to the following two sites is where it is all explained. https://planetcalc.com/8594/...

Believe it or not the index approach is the most optimized way of preserving the combinations info. I know there is a procedure to encode and decode any combination sets into a unique index. I had come across this problem a long time ago and I remember reading about it in a paper. But I can...

I am not looking to store any combinations. In my project I find the combinations C1,C2 and C3. For simplicity we can order these so that, in your example say 6,3,4 is in ascending order, 3,4,6. What I need is to come up with an index that is mapped only to the combinations of C1,C2,C3...

Hi, I am looking for the psuedo code. In your example numbers that are the same are not allowed ! So 000, 223 and so on are not valid combinations. The order of the numbers is not important. What is important that the index points to a combination of 3 digit code. Also I used a simple...

Hello All, Not sure if this belongs in general math but lets start here and see where it takes us. In mathematics, a combination is a way of selecting items from a collection where the order of selection does not matter. As an example , say we have digits 1 to 10. And we want to select 3...

For anyone interested I tried both windows and it is very very hard to tell the difference in the outputs. At least with the audio signals I tried they both performed equally well under subjective testing. Thx

I used Hamming window with 50% overlap. Any reasons Hann function would be better ?

Thank you "FactChecker" for that info. I have implemented the procedure as in the phase vocoder description and it works !! THANKS AGAIN !! Raminee

Hello All, I am somewhat familiar with FFT and iFFT and its uses. However I have an issue when I edit in Freq domain and try to get back to time domain . I have an audio signal in time domain that I transform to frequency domain using an FFT routine in block sizes of N points. (in my case 256...

Thank you DrClaude for this formula. Given the example I posted I assume n=5, S2 is S(i+1) and S1 is S(i) where (i) is the sample position from 0 to 4. You formula works for the example that I have given and the index goes from 1 to 10 which is fine. But I was looking for more of a generic...

In the example I have chosen we have 5 samples in our data set. So n =5. I have selected r to be 2. So we are looking at 2 sample combinations out of 5. As shown in the attached picture in my original post the 2 sample combinations are indicated as 1s. So in the table first 2 samples...

The Combinations formulae will find the number of possible combinations that can be obtained by taking a sample of items from a larger set. C = n! / [r! * (n-r)! ] Where n is the number of set samples and r is the number of desired selected samples. So as an example say we have n=5...