Re: psychoacoustically driven temporal approximation (Joachim Thiemann )

Subject: Re: psychoacoustically driven temporal approximation
From:    Joachim Thiemann  <joachim.thiemann@xxxxxxxx>
Date:    Wed, 5 Mar 2014 11:01:07 +0100

Hello Alberto, I'm not entirely sure, but this sounds a bit like my thoughts when I started my Ph.D. many years ago: can I synthesize an audio waveform from a perceptual representation of another audio signal? (and what does that imply about that particular perceptual representation?) My answer was to so by iterative resynthesis: make a first good guess of the inverse perceptual transform, then correct for the error. Key point is that the correction needs to go in the right direction. My perceptual transform was a set of sparsely sampled hilbert envelopes of the outputs of a gammatone filterbank. If you want you can have a look at my thesis "A Sparse Auditory Envelope Representation with Iterative Reconstruction for Audio Coding", linked from my homepage (, you can find the MATLAB code on that page too. Of course, in my thesis I refer to work that others have done in a similar vein. Cheers, Joachim. On 4 March 2014 12:05, JesterN Alberto Novello <jestern77@xxxxxxxx> wrote: > Hi all, > i'm trying to find a way to approximate the sample values of an audio > waveform in time domain. > I want a method that takes care of approximating perceptually-relevant audio > bands better than others. > Basically a spectral-weighted temporal approximation method. > In my head it's not clear how to connect frequency components to specific > samples in the time domain. > Any DSP wizard out there with a good idea/papers ? > Best regards > Alberto > -- Joachim Thiemann :: ::

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