[vorbis] Low bitrate encoding

[Monty]

On Tue, Jan 09, 2001 at 04:41:49PM +0100, Joerg Bergmann wrote:
> On Tue, 9 Jan 2001 10:19:54 -0500, Gregory Maxwell wrote:
> 
> >> To get good quality downsampling (or A/Ding) you must filter first. This is
> >> non-trivial especially when the rates in noninteger.
> >
> >To get a mental handle on this: Imagine sampling a 15KHz signal at 8KHz.
> >Would you get all zeros?
> >
> Low-pass cannot meen: _No_ frequencies above a limit.

Correct.  Your practical filter can't be perfect.  If it were, you'd
get all zeroes, in the real world though, you can only approach
getting all zeroes.

Monty

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