A more clear question, sorry for two posts; what happens when I send an audio of size larger than SpectrumConfig.WindowSize() ?
On Tue, Sep 8, 2009 at 12:27 AM, paul simmons<[email protected]> wrote: > Hi, > I think the problem is about my SpectralAnalysis config. Just to > clarify; I send an audio as the code below, at each while() iteration, > it reads a chunk of audio (in size of Audio.SetSize()) and returns > just one spectrum, melspectrum and mfcc vector (ok, let's put > overlapping for a moment). But if you say SpectralAnalysis handles > everything (and I configure right), I think I should get an array of > spectrum (and others) vector according to the HopSize right? What is > my mistake here? > > > > > > On Tue, Sep 8, 2009 at 12:01 AM, Xavier Amatriain<[email protected]> wrote: >> I don't think there is a simple example of this. However, if I remember >> right, there are two ways to do the loop if you want to have overlapping >> windows or frames: >> >> 1) Read the whole audio from the audio file into a CLAM::Audio and manage >> the "chunk" you send to the SpectralAnalysis Do by advancing your read >> pointer by "hopsize" (which, if overlapping, will be less than windowSize) >> >> 2) Use ports and let them manage this for you. This is what you can see if >> you analyze the code in SMSAnalysisCore.cxx >> >> http://clam-project.org/doc/CLAM-doxygen/SMSAnalysisCore_8cxx-source.html >> >> If you don't need overlap, SpectralAnalysis will take care of everything >> (windowing, etc...) as long as you configure the parameters right so you >> don't need to worry about 1 or 2. >> >> X >> >> paul simmons wrote: >>> >>> well, let me change the question then. is there a "code" sample for >>> doing spectral analysis with overlapping windows (ie using windowsize >>> and hopsize parameters)? >>> >>> >>> >>> On Mon, Sep 7, 2009 at 8:24 PM, Pau Arumí<[email protected]> >>> wrote: >>> >>>> >>>> Hi Paul, >>>> I didn't understand exactly where the problem is. >>>> (However I think the most qualified to answer you is David Garcia who is >>>> currently on holidays. He'll be back in a week or two.) >>>> >>>> Cheers >>>> P >>>> >>>> El dl 07 de 09 de 2009 a les 16:54 +0200, en/na paul simmons va >>>> escriure: >>>> >>>>> >>>>> Hi, >>>>> I am trying to do MFCC extraction. As far as I get; the steps are >>>>> >>>>> Read an "Audio" >>>>> Run "SpectralAnalysis" on output of "Audio" >>>>> Run "MelFilterBank" on output of "SpectralAnalysis" >>>>> Run "CepstralTransform" on output of "MelFilterBank" >>>>> >>>>> right? >>>>> >>>>> If so; I cannot understand where to do looping, for example if I do: >>>>> >>>>> while(mReader.Do(audio)) >>>>> { >>>>> spectralAnalysis.Do(audio, spectrum); >>>>> melFilterBank.Do(spectrum, melSpectrum); >>>>> cepstralTransform.Do(melSpectrum, melCepstrum); >>>>> >>>>> CLAM::XMLStorage::Dump(audio,"Audio",a); >>>>> CLAM::XMLStorage::Dump(spectrum, "Spectrum",s); >>>>> CLAM::XMLStorage::Dump(melSpectrum, "MelSpectrum",m); >>>>> CLAM::XMLStorage::Dump(melCepstrum, "MelCepstrum",n); >>>>> } >>>>> >>>>> it applies mfcc to each read audio patch (mentioned by Audio.SetSize) >>>>> and got one MFCC feature vector. But I cannot understand how >>>>> WindowSize or HopSize is applied in this fashion. Because since Audio >>>>> is read in non-overlapping windows with mReader.Do(), overlapped >>>>> windows are run only for current audio part >>>>> >>>>> I think there must be another , more correct way to get overlapping >>>>> windows continuesly in whole audio, but cannot find it. Any ideas? >>>>> >>>>> Thanks... >>>>> >>>>> _______________________________________________ >>>>> Clam-devel mailing list >>>>> [email protected] >>>>> >>>>> https://llistes.projectes.lafarga.org/cgi-bin/mailman/listinfo/clam-devel >>>>> >>>> >>>> _______________________________________________ >>>> Clam-devel mailing list >>>> [email protected] >>>> https://llistes.projectes.lafarga.org/cgi-bin/mailman/listinfo/clam-devel >>>> >>>> >>> >>> _______________________________________________ >>> Clam-devel mailing list >>> [email protected] >>> https://llistes.projectes.lafarga.org/cgi-bin/mailman/listinfo/clam-devel >>> >> >> >> _______________________________________________ >> Clam-devel mailing list >> [email protected] >> https://llistes.projectes.lafarga.org/cgi-bin/mailman/listinfo/clam-devel >> > _______________________________________________ Clam-devel mailing list [email protected] https://llistes.projectes.lafarga.org/cgi-bin/mailman/listinfo/clam-devel
