28 Jul
2003
28 Jul
'03
1:29 p.m.
On Mon, Jul 28, 2003 at 04:01:31PM +0200, Anders Torger wrote:
On Monday 28 July 2003 14.59, Alfons Adriaensen
wrote:
Yes, in that sence you are absolutely right. The point I wanted to make
is that sampling by itself does not introduce any quantisation of the
time axis - in the reconstructed signal, the places that correspond to
the sample points are not 'better' than the parts in between.
Some people *do* believe such things...
--
FA
On Mon, Jul 28, 2003 at 02:00:41PM +0200, Anders
Torger wrote:
Well, not exactly. I'm am by no means an expert on dither, so if I have
wrong, let me know.
Think that you are sampling a sine wave, without dither. Truncating to
an even sample can result in a small phase shift after the
reconstruction, which is not there if you make a properly dithered
recording. Thus - dither improves temporal resolution, through
improvement of amplitude resolution.
Am I right? It becomes even more interesting when you bring
in dither. Then you
can represent signals whose amplitude is less than one bit, and you
can increase time resolution to infinity.
Time (phase) resolution *is* already infinite, even without dither.
The quantisation of time and amplitude are two completely different
beasts.