Logarithmically spaced bins

Started by December16 in comp.dsp11 years ago 13 replies

Hi everybody, I got stuck with a simple DSP problem, and I'm not able to find a any resource that might help me. I was reading a well known...

Hi everybody, I got stuck with a simple DSP problem, and I'm not able to find a any resource that might help me. I was reading a well known article (Content Fingerprinting Using Wavelets, M.Covell, S.Baluja), in which there is a small description of audio processing: "We start our processing by converting the audio input (sampled at 5512 Hz) into a spectrogram. We create our spectrograms using ...


Wavelets Question

Started by aadeb in comp.dsp11 years ago 5 replies

Hi I know this question may be rather simple but I am sturggling to understand I am trying to understand wavelets and I have the following...

Hi I know this question may be rather simple but I am sturggling to understand I am trying to understand wavelets and I have the following question I am looking at various DWT schemes and if I understood correctly The Image is filtered through the low and high frequencies along the rows and coloumns respectively to produce the 4 combinations LL,HL,LH,HH. After each stage say after high ...


Frequency bin in wavelets transform

Started by shinchan75034 in comp.dsp10 years ago 1 reply

Dear DSP experts, I would like to know how to calculate the actual range of the frequency bins in the frequency axis. It must have to something...

Dear DSP experts, I would like to know how to calculate the actual range of the frequency bins in the frequency axis. It must have to something to do with the sampling frequency Fs, So I think the top of the top frequency bin must be the half of the Fs, correct? However I don't know the rest of frequency axis, how do you determine the actual Hz where the bands are divided? Thank you for your ...


Wavelets? Dufuslets?

Started by Tim Wescott in comp.dsp5 years ago 5 replies

Given a complex-valued signal, extending from some negative frequency to some positive frequency. Is there some way to separate that signal...

Given a complex-valued signal, extending from some negative frequency to some positive frequency. Is there some way to separate that signal into a bunch of overlapping channels, regularly spaced, other than to have a bunch of filters all running in parallel? I'm thinking there has to be something clever involving FFTs, but I keep utterly failing to figure it out. To make it more c...