Difference between revisions of "Dither"

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-=Overview=
-The term <nowiki>dither</nowiki> is used to describe a special form of wide-band noise that is added to a digital audio signal after the [[wordlength]] is reduced. The purpose is to randomize quantization error of low level signals.
-=Basics=
-In digital audio, the original analog signal [[amplitude]] must be encoded in discrete "steps." The number of possible steps is determined by the [[wordlength]]. For high level (large amplitude) signals, the "step size" relative to the signal is small and the resulting quantization error caused by "rounding up or rounding down" to the closest discrete step is small.
-At very low signal levels (small amplitude); the error becomes quite significant and the audible effect is a very "non-harmonic" distortion that increases in level as signal level approaches the least significant bit ([[lsb]]) level.
-[http://en.wikipedia.org/wiki/Dither For more detailed information click here]

Revision as of 16:47, 3 July 2012