26 Jul
2005
26 Jul
'05
2:25 p.m.
On Tue, Jul 26, 2005 at 05:51:09 +0200, Alfons Adriaensen wrote:
On Tue, Jul 26, 2005 at 09:45:45AM +0100, Steve Harris
wrote:
True, but I'm casting it to a float, so the LS 7-ish bits will be lost
anyway, and the ones above should have sufficiently long period that they
won't be noticable, even if it weren't used for dithering :)
- Steve
Yes, note that its not much good as a random
number generator as
its easily predictable,
All 'psuedoramdom' generators are predictable, that doesn't make
them less 'good', except for cryptographic applications.
but in this case all thats required is that it
produces noise that is approximatly white (ie. equal energy in each
frequency band), and its efficient.
It's a perfectly good choice for this application. Its only problem
is when you use it to generate random *bits*. Witm m = 2^N, the
lower n bits will form of cycle of lenght 2^n, so e.g. the LS bit is
just altermating 0,1,0,1,0,1 -- not very random.