TerryS;676216 Wrote: > Here is a discussion of distortion vs number of bits: > http://en.wikipedia.org/wiki/Signal-to-noise_ratio > > and here: > http://en.wikipedia.org/wiki/Quantization_error > > The key equation you will find over and over is: > > Signal to noise Quanitzation Noise Ratio(SQNR)is: > > SQNR = 1.761 _ 6.02 * (Q) (in dB), where Q is the number of bits that > are used to digitize the signal. > > Terry Oh and it says "At lower amplitudes the quantization error becomes dependent on the input signal, resulting in distortion. This distortion is created after the anti-aliasing filter, and if these distortions are above 1/2 the sample rate they will alias back into the audio band. In order to make the quantization error independent of the input signal, noise with an amplitude of 2 least significant bits is added to the signal. This slightly reduces signal to noise ratio, but, ideally, completely eliminates the distortion. It is known as dither"
Which is exactly what I have been saying. That's it. I am now vowing never to reply to a posting of yours again. -- adamdea ------------------------------------------------------------------------ adamdea's Profile: http://forums.slimdevices.com/member.php?userid=37603 View this thread: http://forums.slimdevices.com/showthread.php?t=89733 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
