> For example, going from 22050 to 44100, just make every other sample a zero,
> then apply a lowpass (however you like) with a cutoff just below 11.025 kHz.
> Now downsampling is needed in this case (well, the downsample factor is 1).
someone please correct me if im massively confused here... the first
thing you do to the input when encoding is convert it to frequency
spectra, right? so why not just treat 22khz input exactly the same
as 44khz, except half all computed frequencies and fft windows? why
ever convert back to pcm?
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