Messages in this thread | | | Date | Tue, 15 Sep 1998 10:05:58 +0200 (CEST) | From | Geert Uytterhoeven <> | Subject | Re: NEWSFLASH! Linux ported to Commodore VIC-20!! |
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On 15 Sep 1998, Michael Shields wrote: > In article <6tk3em$can$1@palladium.transmeta.com>, > hpa@transmeta.com (H. Peter Anvin) wrote: > > With what, 3 dB of noise margin? (I think the quantization noise > > floor is -3.32 dB per bit.) > > It must be more than that, or else have another variable; 16-bit CD > players are routinely speced at 90 dB.
Yes, it's about the double. For signal power you need the square of the amplitude. For 1 bit you have:
10*log10(2^2) = 20*log10(2) = 6.02 dB
Since 16 bit CDDA is signed, the SNR is 20*log10(2^15) = 90.31 dB.
Greetings,
Geert
-- Geert Uytterhoeven Geert.Uytterhoeven@cs.kuleuven.ac.be Wavelets, Linux/{m68k~Amiga,PPC~CHRP} http://www.cs.kuleuven.ac.be/~geert/ Department of Computer Science -- Katholieke Universiteit Leuven -- Belgium
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