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Tom.Reding (talk | contribs) m -redundant class param; cleanup |
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{{Merged-to|Quantization (signal processing)|date=2013-05-19}}
"Many physical quantities are actually quantized by physical entities. Examples of fields where this limitation applies include electronics (due to electrons), optics (due to photons), and chemistry (due to molecules). This is sometimes known as the "quantum noise limit" of systems in those fields. This is a different manifestation of "quantization error," in which theoretical models may be analog but physics occurs digitally. Around the quantum limit, the distinction between analog and digital quantities vanishes."
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:In other words, in the signal processing realm, quantization error is added to a signal when it is first digitized, and round-off error is added as you do computations on that already-digital signal. Maybe they are the same thing with different names, but I think they are different enough to have different articles. Maybe, maybe not. — [[User:Omegatron|Omegatron]] 14:14, 18 October 2005 (UTC)
== merge complete ==
<s>See discussion at [[Talk:Quantization_noise#Don.27t_Merge]].</s>▼
:Merge complete.
▲See discussion at [[Talk:Quantization_noise#Don.27t_Merge]].
== Copying discussion from quantization noise article (now merged) to this talk page. ==
▲{{physics|class=|importance=}}
"The noise is additive and independent of the signal when the number of bits <math> Q </math> is greater than 4, that is, more than 16 digitizing levels, <math> L = 2^Q </math>."
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:Wonderful. Thank you. — [[User:Omegatron|Omegatron]] 14:44, 6 December 2005 (UTC)
∞ How about adding that to the page? This is a pretty fundamental and relevant equation to people who use ADCs. [[User:Guerberj|Guerberj]] ([[User talk:Guerberj|talk]]) 16:49, 14 May 2010 (UTC)
== Don't Merge ==
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--[[User:68.0.120.35|68.0.120.35]] 01:05, 25 May 2007 (UTC)
== Why modulation? ==
I'm removing the first line of this article, which says that quantization error has to do with the conversion from PAM to PCM. If an analog signal is in a PAM form, there's already quantization error. --'''[[User:TedPavlic|TedPavlic]]''' | [[User_talk:TedPavlic|talk]] 16:08, 18 February 2008 (UTC)
== Spanish version ==
I would suggest translating the spanish version: [[:es:Ruido de cuantificación|Ruido de cuantificación]]. --[[Special:Contributions/213.37.235.41|213.37.235.41]] ([[User talk:213.37.235.41|talk]]) 19:12, 2 May 2008 (UTC)
== Redirection ==
The link to quantization noise redirect to itself ( = this page ). Since I'm not a regular wiki user I prefer just telling and letting someone "who knows" doing it [[Special:Contributions/213.121.242.200|213.121.242.200]] ([[User talk:213.121.242.200|talk]]) 22:46, 14 May 2008 (UTC)
== Misleading figure ==
The graphical representation of quantization error does not take into account how the digital signal is reconstructed. Quantization error is the difference between the [[signal reconstruction|reconstructed signal]] and the [[band limited]] original. --[[User:Kvng|Kvng]] ([[User talk:Kvng|talk]]) 19:20, 23 December 2010 (UTC)
:You are wrong, only offects sampling rate are affected by signal reconstruction. The example seems to use infinite sampling rate, so there is nothing to reconstruct. It is a bit misleading however, such signal is invalid, noise should be added prior to sampling.--[[Special:Contributions/90.179.235.249|90.179.235.249]] ([[User talk:90.179.235.249|talk]]) 19:20, 19 February 2011 (UTC)
::I did assume a finite sample rate. I can see how the figure is correct for a system with infinite sample rate. Infinite sample rate is not practical so I'm not convinced that this is a good illustration. --[[User:Kvng|Kvng]] ([[User talk:Kvng|talk]]) 03:12, 20 February 2011 (UTC)
:::It's an illustration of quantization error, not sample rate.--[[Special:Contributions/90.179.235.249|90.179.235.249]] ([[User talk:90.179.235.249|talk]]) 23:21, 20 February 2011 (UTC)
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