From: Patent Tactics, George Brock-Nannestad
Hi Marie,
you wrote:
> Could someone please explain to me what Square, Oblong and Rectangular
> mean in relation to Bit Rate?
----- I have never heard the expressions before, but it is imagery that I
would use myself when discussing the information content of a sampled signal.
If I were to use it, the bit depth would be the height of a Rectangle, and
the number of samples per second the width. Dependent on tradition, I suppose
that you could say that 16 bit, 44.1 kSamples/second could be called Square,
because everybody for a time was convinced that this was what you needed. I
would rather say historically it was 12 bit and 50 kHz, because that is what
was used in measurement technology before someone started mixing audio and
video frame rate requirements.
Now, using that language, I would say that Oblong would be having a higher
sample rate but the same bit depth. In acutal fact, any bits above 16 is
different today from what it was yesterday or in an hour: the resolution is
not at all absulute at such a high sample rate. Agilent (used to be Hewlett-
Packard) make some fine multi (decimal)-digit voltmeters, and their sample
rate to obtain the high measurement precision cannot go above a few tenths of
Hertz. And I would say that a flash A/D converter (1-bit converter) would be
the most oblong of them all.
If there is to be a trade-off, I would go for higher sample rate, if you can
contain your jitter.
----- this is, as Tom Fine usually says, one man's opinion, but I would
defend it as being logical.
Kind regards,
George
>
> Cheers
> Marie
|