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From: toma@hpsad.HP.COM (Tom Anderson)
Newsgroups: comp.dsp
Subject: Re: 48k to 44.1k sample rate conversion
Message-ID: <9520018@hpsad.HP.COM>
Date: 31 May 91 00:28:53 GMT
References: <5826@media-lab.media.mit.edu.MEDIA.MIT.EDU>
Organization: HP Signal Analysis Division - Rohnert Park, CA
Lines: 17

>   How bad is interpolation?  Clearly, the signal probably did not look
>   like the linear interpolation of the samples (I know, look is not
>   important; hear or dB is), but it seems to be a "reasonable" 
>   approximation.

  I have been using interpolation in a sampled system with irregularly
spaced time points.  This is a different and more data dependent problem
than the sample rate conversion being discussed here, but my conclusions
are:

1. Linear interpolation can be real bad.
2. Interpolation by Gauss' method is good for time domain data.
3. Pade interpolation should be good for frequency domain data, but I 
   haven't verified this yet.
4. Interpolation by Gauss' method and Pade interpolation are really slow.

Tom Anderson    toma@hpsad.hp.com     "It's only hardware"