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Re: psychoacoustically driven temporal approximation

Alberto, the question is not clear.  When you say "in the time domain" do you mean you are looking for alternatives to the widely used perceptual audio coders that use filterbanks? 

If "a spectral-weighted temporal approximation method" is what you want, don't try to "connect frequency components to specific samples in the time domain".  Frequency components are not a relevant concept in the time domain. 

Possibly what you want is something like LPC whitening with residual coding.  See for example:
Singhal, Sharad. "High quality audio coding using multipulse LPC." ICASSP, 1990.


On Tue, Mar 4, 2014 at 3:05 AM, 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

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