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aperiodic sampling

Can anyone point me towards software or documentation that does lossless aperiodic sampling, ie using different sampling rates for different parts of a signal?

aperiodic sampling

Reply #1
Can anyone point me towards software or documentation that does lossless aperiodic sampling, ie using different sampling rates for different parts of a signal?

There isn't even a method that's widely agreed upon for reconstructing such a sampled signal. So, it's no surprise that you have a hard time finding anything on this that's also "lossless".

You could try reversible integer-wavelet transforms or the IntMDCT hoping for upper subbands or frequency coefficients to be zero. The idea is that when the upper subbands / transform coefficients are zero you don't need to store these -- effectivly limiting the bandwith = lower sampling rate. But they won't be exactly zero most of the time. So, you still have to code these samples in order to make your system lossless.

Cheers,
SG

 
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